./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/popl20-bad-counter-queue2.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-bad-counter-queue2.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 7c615a04683f0f8050243ec529c03e20511a5c93f5e823175650f11e9fefc562 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-17 22:52:12,373 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-17 22:52:12,375 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-17 22:52:12,417 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-17 22:52:12,417 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-17 22:52:12,421 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-17 22:52:12,422 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-17 22:52:12,425 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-17 22:52:12,427 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-17 22:52:12,430 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-17 22:52:12,431 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-17 22:52:12,432 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-17 22:52:12,432 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-17 22:52:12,435 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-17 22:52:12,436 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-17 22:52:12,440 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-17 22:52:12,441 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-17 22:52:12,442 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-17 22:52:12,444 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-17 22:52:12,446 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-17 22:52:12,448 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-17 22:52:12,449 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-17 22:52:12,450 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-17 22:52:12,451 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-17 22:52:12,458 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-17 22:52:12,458 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-17 22:52:12,459 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-17 22:52:12,459 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-17 22:52:12,460 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-17 22:52:12,460 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-17 22:52:12,461 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-17 22:52:12,461 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-17 22:52:12,462 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-17 22:52:12,462 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-17 22:52:12,463 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-17 22:52:12,463 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-17 22:52:12,464 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-17 22:52:12,464 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-17 22:52:12,465 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-17 22:52:12,465 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-17 22:52:12,466 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-17 22:52:12,470 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-17 22:52:12,499 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-17 22:52:12,499 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-17 22:52:12,500 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-17 22:52:12,500 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-17 22:52:12,501 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-17 22:52:12,501 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-17 22:52:12,502 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-17 22:52:12,502 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-17 22:52:12,502 INFO L138 SettingsManager]: * Use SBE=true [2021-12-17 22:52:12,503 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-17 22:52:12,504 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-17 22:52:12,504 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-17 22:52:12,504 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-17 22:52:12,504 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-17 22:52:12,504 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-17 22:52:12,504 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-17 22:52:12,505 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-17 22:52:12,505 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-17 22:52:12,505 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-17 22:52:12,505 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-17 22:52:12,505 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-17 22:52:12,505 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-17 22:52:12,506 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-17 22:52:12,506 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-17 22:52:12,506 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 22:52:12,506 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-17 22:52:12,507 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-17 22:52:12,508 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-17 22:52:12,508 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-17 22:52:12,508 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-17 22:52:12,508 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-17 22:52:12,508 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-17 22:52:12,509 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-17 22:52:12,509 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-17 22:52:12,509 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7c615a04683f0f8050243ec529c03e20511a5c93f5e823175650f11e9fefc562 [2021-12-17 22:52:12,772 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-17 22:52:12,795 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-17 22:52:12,797 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-17 22:52:12,798 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-17 22:52:12,798 INFO L275 PluginConnector]: CDTParser initialized [2021-12-17 22:52:12,800 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-bad-counter-queue2.wvr.c [2021-12-17 22:52:12,848 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3b7a5745a/fb9700e470fb4ab3972debddc4821d61/FLAG1f5cd6711 [2021-12-17 22:52:13,268 INFO L306 CDTParser]: Found 1 translation units. [2021-12-17 22:52:13,269 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-bad-counter-queue2.wvr.c [2021-12-17 22:52:13,278 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3b7a5745a/fb9700e470fb4ab3972debddc4821d61/FLAG1f5cd6711 [2021-12-17 22:52:13,288 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3b7a5745a/fb9700e470fb4ab3972debddc4821d61 [2021-12-17 22:52:13,290 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-17 22:52:13,295 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-17 22:52:13,298 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-17 22:52:13,298 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-17 22:52:13,301 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-17 22:52:13,301 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 10:52:13" (1/1) ... [2021-12-17 22:52:13,302 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@29522a5a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 10:52:13, skipping insertion in model container [2021-12-17 22:52:13,306 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 10:52:13" (1/1) ... [2021-12-17 22:52:13,316 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-17 22:52:13,354 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-17 22:52:13,620 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-bad-counter-queue2.wvr.c[2271,2284] [2021-12-17 22:52:13,668 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 22:52:13,675 INFO L203 MainTranslator]: Completed pre-run [2021-12-17 22:52:13,704 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-bad-counter-queue2.wvr.c[2271,2284] [2021-12-17 22:52:13,708 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 22:52:13,723 INFO L208 MainTranslator]: Completed translation [2021-12-17 22:52:13,723 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 10:52:13 WrapperNode [2021-12-17 22:52:13,723 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-17 22:52:13,724 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-17 22:52:13,724 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-17 22:52:13,724 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-17 22:52:13,733 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 10:52:13" (1/1) ... [2021-12-17 22:52:13,755 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 10:52:13" (1/1) ... [2021-12-17 22:52:13,792 INFO L137 Inliner]: procedures = 26, calls = 36, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 138 [2021-12-17 22:52:13,797 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-17 22:52:13,798 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-17 22:52:13,798 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-17 22:52:13,798 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-17 22:52:13,804 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 10:52:13" (1/1) ... [2021-12-17 22:52:13,804 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 10:52:13" (1/1) ... [2021-12-17 22:52:13,818 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 10:52:13" (1/1) ... [2021-12-17 22:52:13,818 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 10:52:13" (1/1) ... [2021-12-17 22:52:13,825 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 10:52:13" (1/1) ... [2021-12-17 22:52:13,843 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 10:52:13" (1/1) ... [2021-12-17 22:52:13,844 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 10:52:13" (1/1) ... [2021-12-17 22:52:13,846 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-17 22:52:13,851 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-17 22:52:13,851 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-17 22:52:13,851 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-17 22:52:13,852 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 10:52:13" (1/1) ... [2021-12-17 22:52:13,858 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 22:52:13,869 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 22:52:13,910 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 22:52:13,935 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 22:52:13,980 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-17 22:52:13,981 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-17 22:52:13,981 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-17 22:52:13,982 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-17 22:52:13,982 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-12-17 22:52:13,982 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-12-17 22:52:13,995 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-12-17 22:52:13,995 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-12-17 22:52:13,996 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-17 22:52:13,996 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-12-17 22:52:13,996 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-12-17 22:52:13,996 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-17 22:52:13,997 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-17 22:52:13,997 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-17 22:52:13,997 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-17 22:52:13,998 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 22:52:14,129 INFO L236 CfgBuilder]: Building ICFG [2021-12-17 22:52:14,130 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-17 22:52:14,367 INFO L277 CfgBuilder]: Performing block encoding [2021-12-17 22:52:14,441 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-17 22:52:14,442 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-12-17 22:52:14,444 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 10:52:14 BoogieIcfgContainer [2021-12-17 22:52:14,444 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-17 22:52:14,445 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-17 22:52:14,445 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-17 22:52:14,457 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-17 22:52:14,457 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.12 10:52:13" (1/3) ... [2021-12-17 22:52:14,458 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33f40d87 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 10:52:14, skipping insertion in model container [2021-12-17 22:52:14,458 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 10:52:13" (2/3) ... [2021-12-17 22:52:14,458 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33f40d87 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 10:52:14, skipping insertion in model container [2021-12-17 22:52:14,458 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 10:52:14" (3/3) ... [2021-12-17 22:52:14,459 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-bad-counter-queue2.wvr.c [2021-12-17 22:52:14,463 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-12-17 22:52:14,463 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-17 22:52:14,463 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-17 22:52:14,463 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-12-17 22:52:14,503 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:52:14,504 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:52:14,504 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:52:14,504 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:52:14,504 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:52:14,504 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:52:14,504 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:52:14,505 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:52:14,505 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:52:14,505 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:52:14,505 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:52:14,505 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:52:14,505 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_plus_~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:52:14,505 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_plus_#in~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:52:14,506 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:52:14,506 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_plus_~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:52:14,506 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ret3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:52:14,506 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:52:14,506 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_plus_#res#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:52:14,506 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_plus_#in~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:52:14,507 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:52:14,507 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:52:14,507 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_plus_~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:52:14,507 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_plus_#in~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:52:14,507 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:52:14,507 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_plus_~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:52:14,507 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ret3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:52:14,508 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:52:14,508 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_plus_#res#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:52:14,508 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_plus_#in~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:52:14,508 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:52:14,508 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:52:14,508 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:52:14,509 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:52:14,509 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:52:14,509 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:52:14,509 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:52:14,509 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:52:14,509 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:52:14,509 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:52:14,510 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:52:14,510 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:52:14,510 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:52:14,510 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:52:14,510 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:52:14,510 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:52:14,511 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:52:14,511 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:52:14,511 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:52:14,511 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:52:14,511 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:52:14,511 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:52:14,512 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_minus_#in~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:52:14,512 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_minus_~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:52:14,512 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:52:14,512 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~ret6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:52:14,512 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_minus_#in~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:52:14,512 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_minus_#res#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:52:14,512 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_minus_~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:52:14,512 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:52:14,513 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:52:14,513 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:52:14,513 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_minus_#in~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:52:14,513 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_minus_~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:52:14,513 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:52:14,513 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~ret6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:52:14,514 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_minus_#in~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:52:14,514 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_minus_#res#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:52:14,514 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_minus_~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:52:14,514 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:52:14,514 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:52:14,514 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:52:14,514 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:52:14,515 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:52:14,515 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:52:14,515 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:52:14,515 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:52:14,515 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:52:14,515 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:52:14,515 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:52:14,517 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:52:14,517 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_plus_~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:52:14,518 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ret3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:52:14,518 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_plus_#in~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:52:14,518 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_plus_~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:52:14,518 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:52:14,518 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:52:14,518 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:52:14,519 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:52:14,519 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:52:14,519 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_plus_#in~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:52:14,519 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_plus_#res#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:52:14,519 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:52:14,520 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:52:14,520 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_minus_~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:52:14,520 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:52:14,520 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:52:14,521 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_minus_#res#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:52:14,521 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:52:14,521 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_minus_~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:52:14,521 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:52:14,521 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:52:14,521 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_minus_#in~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:52:14,521 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:52:14,522 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_minus_#in~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:52:14,522 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~ret6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:52:14,523 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-12-17 22:52:14,576 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-17 22:52:14,581 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 22:52:14,581 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-12-17 22:52:14,588 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 115 places, 117 transitions, 250 flow [2021-12-17 22:52:14,616 INFO L129 PetriNetUnfolder]: 9/115 cut-off events. [2021-12-17 22:52:14,616 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-12-17 22:52:14,618 INFO L84 FinitePrefix]: Finished finitePrefix Result has 124 conditions, 115 events. 9/115 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 63 event pairs, 0 based on Foata normal form. 0/105 useless extension candidates. Maximal degree in co-relation 80. Up to 2 conditions per place. [2021-12-17 22:52:14,619 INFO L82 GeneralOperation]: Start removeDead. Operand has 115 places, 117 transitions, 250 flow [2021-12-17 22:52:14,622 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 104 places, 106 transitions, 224 flow [2021-12-17 22:52:14,638 INFO L129 PetriNetUnfolder]: 9/105 cut-off events. [2021-12-17 22:52:14,638 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-12-17 22:52:14,639 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 22:52:14,639 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 22:52:14,640 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 22:52:14,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 22:52:14,643 INFO L85 PathProgramCache]: Analyzing trace with hash -1137316496, now seen corresponding path program 1 times [2021-12-17 22:52:14,649 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 22:52:14,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346704058] [2021-12-17 22:52:14,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 22:52:14,650 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 22:52:14,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 22:52:14,768 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 22:52:14,768 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 22:52:14,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346704058] [2021-12-17 22:52:14,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346704058] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 22:52:14,769 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 22:52:14,769 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 22:52:14,770 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458099512] [2021-12-17 22:52:14,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 22:52:14,776 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-17 22:52:14,776 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 22:52:14,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-17 22:52:14,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-17 22:52:14,796 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 117 [2021-12-17 22:52:14,799 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 106 transitions, 224 flow. Second operand has 2 states, 2 states have (on average 107.5) internal successors, (215), 2 states have internal predecessors, (215), 0 states have call successors, (0), 0 states 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 22:52:14,799 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 22:52:14,800 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 117 [2021-12-17 22:52:14,800 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 22:52:14,857 INFO L129 PetriNetUnfolder]: 12/133 cut-off events. [2021-12-17 22:52:14,861 INFO L130 PetriNetUnfolder]: For 21/22 co-relation queries the response was YES. [2021-12-17 22:52:14,862 INFO L84 FinitePrefix]: Finished finitePrefix Result has 167 conditions, 133 events. 12/133 cut-off events. For 21/22 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 166 event pairs, 3 based on Foata normal form. 13/135 useless extension candidates. Maximal degree in co-relation 78. Up to 19 conditions per place. [2021-12-17 22:52:14,863 INFO L132 encePairwiseOnDemand]: 111/117 looper letters, 6 selfloop transitions, 0 changer transitions 3/100 dead transitions. [2021-12-17 22:52:14,864 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 100 transitions, 224 flow [2021-12-17 22:52:14,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-17 22:52:14,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2021-12-17 22:52:14,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 220 transitions. [2021-12-17 22:52:14,874 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9401709401709402 [2021-12-17 22:52:14,875 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 220 transitions. [2021-12-17 22:52:14,875 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 220 transitions. [2021-12-17 22:52:14,876 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 22:52:14,878 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 220 transitions. [2021-12-17 22:52:14,882 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 110.0) internal successors, (220), 2 states have internal predecessors, (220), 0 states have call successors, (0), 0 states 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 22:52:14,887 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 117.0) internal successors, (351), 3 states have internal predecessors, (351), 0 states have call successors, (0), 0 states 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 22:52:14,887 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 117.0) internal successors, (351), 3 states have internal predecessors, (351), 0 states have call successors, (0), 0 states 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 22:52:14,889 INFO L186 Difference]: Start difference. First operand has 104 places, 106 transitions, 224 flow. Second operand 2 states and 220 transitions. [2021-12-17 22:52:14,889 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 100 transitions, 224 flow [2021-12-17 22:52:14,892 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 100 transitions, 216 flow, removed 0 selfloop flow, removed 4 redundant places. [2021-12-17 22:52:14,894 INFO L242 Difference]: Finished difference. Result has 101 places, 97 transitions, 198 flow [2021-12-17 22:52:14,896 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=204, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=198, PETRI_PLACES=101, PETRI_TRANSITIONS=97} [2021-12-17 22:52:14,898 INFO L334 CegarLoopForPetriNet]: 104 programPoint places, -3 predicate places. [2021-12-17 22:52:14,898 INFO L470 AbstractCegarLoop]: Abstraction has has 101 places, 97 transitions, 198 flow [2021-12-17 22:52:14,898 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 107.5) internal successors, (215), 2 states have internal predecessors, (215), 0 states have call successors, (0), 0 states 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 22:52:14,899 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 22:52:14,899 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 22:52:14,899 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-17 22:52:14,899 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 22:52:14,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 22:52:14,900 INFO L85 PathProgramCache]: Analyzing trace with hash 1204015377, now seen corresponding path program 1 times [2021-12-17 22:52:14,900 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 22:52:14,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537773735] [2021-12-17 22:52:14,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 22:52:14,901 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 22:52:14,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 22:52:15,112 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 22:52:15,112 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 22:52:15,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537773735] [2021-12-17 22:52:15,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537773735] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 22:52:15,113 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 22:52:15,114 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 22:52:15,114 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766441732] [2021-12-17 22:52:15,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 22:52:15,115 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 22:52:15,115 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 22:52:15,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 22:52:15,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 22:52:15,118 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 117 [2021-12-17 22:52:15,119 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 97 transitions, 198 flow. Second operand has 5 states, 5 states have (on average 91.4) internal successors, (457), 5 states have internal predecessors, (457), 0 states have call successors, (0), 0 states 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 22:52:15,119 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 22:52:15,119 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 117 [2021-12-17 22:52:15,119 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 22:52:15,197 INFO L129 PetriNetUnfolder]: 13/150 cut-off events. [2021-12-17 22:52:15,197 INFO L130 PetriNetUnfolder]: For 7/8 co-relation queries the response was YES. [2021-12-17 22:52:15,198 INFO L84 FinitePrefix]: Finished finitePrefix Result has 195 conditions, 150 events. 13/150 cut-off events. For 7/8 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 245 event pairs, 0 based on Foata normal form. 1/141 useless extension candidates. Maximal degree in co-relation 192. Up to 24 conditions per place. [2021-12-17 22:52:15,199 INFO L132 encePairwiseOnDemand]: 111/117 looper letters, 20 selfloop transitions, 3 changer transitions 4/105 dead transitions. [2021-12-17 22:52:15,199 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 105 transitions, 271 flow [2021-12-17 22:52:15,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 22:52:15,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-12-17 22:52:15,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 468 transitions. [2021-12-17 22:52:15,204 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8 [2021-12-17 22:52:15,204 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 468 transitions. [2021-12-17 22:52:15,205 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 468 transitions. [2021-12-17 22:52:15,206 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 22:52:15,207 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 468 transitions. [2021-12-17 22:52:15,208 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 93.6) internal successors, (468), 5 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 22:52:15,211 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 117.0) internal successors, (702), 6 states have internal predecessors, (702), 0 states have call successors, (0), 0 states 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 22:52:15,211 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 117.0) internal successors, (702), 6 states have internal predecessors, (702), 0 states have call successors, (0), 0 states 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 22:52:15,211 INFO L186 Difference]: Start difference. First operand has 101 places, 97 transitions, 198 flow. Second operand 5 states and 468 transitions. [2021-12-17 22:52:15,211 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 105 transitions, 271 flow [2021-12-17 22:52:15,212 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 105 transitions, 271 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-12-17 22:52:15,215 INFO L242 Difference]: Finished difference. Result has 105 places, 99 transitions, 221 flow [2021-12-17 22:52:15,230 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=198, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=221, PETRI_PLACES=105, PETRI_TRANSITIONS=99} [2021-12-17 22:52:15,231 INFO L334 CegarLoopForPetriNet]: 104 programPoint places, 1 predicate places. [2021-12-17 22:52:15,231 INFO L470 AbstractCegarLoop]: Abstraction has has 105 places, 99 transitions, 221 flow [2021-12-17 22:52:15,232 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 91.4) internal successors, (457), 5 states have internal predecessors, (457), 0 states have call successors, (0), 0 states 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 22:52:15,232 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 22:52:15,232 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 22:52:15,232 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-17 22:52:15,233 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 22:52:15,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 22:52:15,233 INFO L85 PathProgramCache]: Analyzing trace with hash -791054983, now seen corresponding path program 1 times [2021-12-17 22:52:15,233 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 22:52:15,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040574320] [2021-12-17 22:52:15,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 22:52:15,234 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 22:52:15,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 22:52:15,384 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 22:52:15,385 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 22:52:15,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040574320] [2021-12-17 22:52:15,385 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040574320] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 22:52:15,385 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 22:52:15,385 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 22:52:15,386 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935473850] [2021-12-17 22:52:15,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 22:52:15,387 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 22:52:15,387 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 22:52:15,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 22:52:15,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-17 22:52:15,389 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 117 [2021-12-17 22:52:15,389 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 99 transitions, 221 flow. Second operand has 7 states, 7 states have (on average 86.0) internal successors, (602), 7 states have internal predecessors, (602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:52:15,389 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 22:52:15,390 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 117 [2021-12-17 22:52:15,390 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 22:52:15,581 INFO L129 PetriNetUnfolder]: 83/368 cut-off events. [2021-12-17 22:52:15,582 INFO L130 PetriNetUnfolder]: For 33/33 co-relation queries the response was YES. [2021-12-17 22:52:15,584 INFO L84 FinitePrefix]: Finished finitePrefix Result has 622 conditions, 368 events. 83/368 cut-off events. For 33/33 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1518 event pairs, 34 based on Foata normal form. 0/321 useless extension candidates. Maximal degree in co-relation 615. Up to 125 conditions per place. [2021-12-17 22:52:15,585 INFO L132 encePairwiseOnDemand]: 108/117 looper letters, 41 selfloop transitions, 8 changer transitions 0/119 dead transitions. [2021-12-17 22:52:15,585 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 119 transitions, 374 flow [2021-12-17 22:52:15,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-17 22:52:15,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-12-17 22:52:15,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 710 transitions. [2021-12-17 22:52:15,588 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7585470085470085 [2021-12-17 22:52:15,588 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 710 transitions. [2021-12-17 22:52:15,588 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 710 transitions. [2021-12-17 22:52:15,588 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 22:52:15,589 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 710 transitions. [2021-12-17 22:52:15,590 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 88.75) internal successors, (710), 8 states have internal predecessors, (710), 0 states have call successors, (0), 0 states 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 22:52:15,591 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 117.0) internal successors, (1053), 9 states have internal predecessors, (1053), 0 states have call successors, (0), 0 states 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 22:52:15,592 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 117.0) internal successors, (1053), 9 states have internal predecessors, (1053), 0 states have call successors, (0), 0 states 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 22:52:15,592 INFO L186 Difference]: Start difference. First operand has 105 places, 99 transitions, 221 flow. Second operand 8 states and 710 transitions. [2021-12-17 22:52:15,592 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 119 transitions, 374 flow [2021-12-17 22:52:15,594 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 119 transitions, 365 flow, removed 2 selfloop flow, removed 3 redundant places. [2021-12-17 22:52:15,596 INFO L242 Difference]: Finished difference. Result has 110 places, 102 transitions, 250 flow [2021-12-17 22:52:15,596 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=214, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=250, PETRI_PLACES=110, PETRI_TRANSITIONS=102} [2021-12-17 22:52:15,597 INFO L334 CegarLoopForPetriNet]: 104 programPoint places, 6 predicate places. [2021-12-17 22:52:15,597 INFO L470 AbstractCegarLoop]: Abstraction has has 110 places, 102 transitions, 250 flow [2021-12-17 22:52:15,597 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 86.0) internal successors, (602), 7 states have internal predecessors, (602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:52:15,597 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 22:52:15,598 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 22:52:15,598 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-17 22:52:15,598 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 22:52:15,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 22:52:15,598 INFO L85 PathProgramCache]: Analyzing trace with hash -1100554709, now seen corresponding path program 1 times [2021-12-17 22:52:15,599 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 22:52:15,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794402605] [2021-12-17 22:52:15,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 22:52:15,599 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 22:52:15,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 22:52:15,659 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 22:52:15,659 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 22:52:15,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794402605] [2021-12-17 22:52:15,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794402605] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 22:52:15,660 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 22:52:15,660 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 22:52:15,660 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611392409] [2021-12-17 22:52:15,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 22:52:15,661 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 22:52:15,661 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 22:52:15,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 22:52:15,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-17 22:52:15,662 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 117 [2021-12-17 22:52:15,663 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 102 transitions, 250 flow. Second operand has 7 states, 7 states have (on average 86.0) internal successors, (602), 7 states have internal predecessors, (602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:52:15,663 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 22:52:15,663 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 117 [2021-12-17 22:52:15,663 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 22:52:16,007 INFO L129 PetriNetUnfolder]: 67/286 cut-off events. [2021-12-17 22:52:16,008 INFO L130 PetriNetUnfolder]: For 51/54 co-relation queries the response was YES. [2021-12-17 22:52:16,008 INFO L84 FinitePrefix]: Finished finitePrefix Result has 510 conditions, 286 events. 67/286 cut-off events. For 51/54 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1008 event pairs, 36 based on Foata normal form. 3/268 useless extension candidates. Maximal degree in co-relation 502. Up to 124 conditions per place. [2021-12-17 22:52:16,010 INFO L132 encePairwiseOnDemand]: 108/117 looper letters, 27 selfloop transitions, 6 changer transitions 11/114 dead transitions. [2021-12-17 22:52:16,011 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 114 transitions, 365 flow [2021-12-17 22:52:16,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-17 22:52:16,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-12-17 22:52:16,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 706 transitions. [2021-12-17 22:52:16,013 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7542735042735043 [2021-12-17 22:52:16,013 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 706 transitions. [2021-12-17 22:52:16,013 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 706 transitions. [2021-12-17 22:52:16,013 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 22:52:16,013 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 706 transitions. [2021-12-17 22:52:16,015 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 88.25) internal successors, (706), 8 states have internal predecessors, (706), 0 states have call successors, (0), 0 states 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 22:52:16,017 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 117.0) internal successors, (1053), 9 states have internal predecessors, (1053), 0 states have call successors, (0), 0 states 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 22:52:16,017 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 117.0) internal successors, (1053), 9 states have internal predecessors, (1053), 0 states have call successors, (0), 0 states 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 22:52:16,017 INFO L186 Difference]: Start difference. First operand has 110 places, 102 transitions, 250 flow. Second operand 8 states and 706 transitions. [2021-12-17 22:52:16,017 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 114 transitions, 365 flow [2021-12-17 22:52:16,019 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 114 transitions, 355 flow, removed 0 selfloop flow, removed 4 redundant places. [2021-12-17 22:52:16,021 INFO L242 Difference]: Finished difference. Result has 115 places, 100 transitions, 244 flow [2021-12-17 22:52:16,021 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=240, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=244, PETRI_PLACES=115, PETRI_TRANSITIONS=100} [2021-12-17 22:52:16,023 INFO L334 CegarLoopForPetriNet]: 104 programPoint places, 11 predicate places. [2021-12-17 22:52:16,023 INFO L470 AbstractCegarLoop]: Abstraction has has 115 places, 100 transitions, 244 flow [2021-12-17 22:52:16,023 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 86.0) internal successors, (602), 7 states have internal predecessors, (602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:52:16,023 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 22:52:16,024 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 22:52:16,024 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-17 22:52:16,024 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 22:52:16,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 22:52:16,032 INFO L85 PathProgramCache]: Analyzing trace with hash -1474470436, now seen corresponding path program 1 times [2021-12-17 22:52:16,032 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 22:52:16,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383540798] [2021-12-17 22:52:16,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 22:52:16,033 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 22:52:16,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 22:52:16,199 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-17 22:52:16,200 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 22:52:16,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383540798] [2021-12-17 22:52:16,200 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383540798] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 22:52:16,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1253532643] [2021-12-17 22:52:16,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 22:52:16,201 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 22:52:16,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 22:52:16,239 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 22:52:16,267 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 22:52:16,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 22:52:16,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-17 22:52:16,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 22:52:16,775 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-17 22:52:16,775 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 22:52:17,096 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-17 22:52:17,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1253532643] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-17 22:52:17,097 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-17 22:52:17,097 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8, 7] total 14 [2021-12-17 22:52:17,097 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963867332] [2021-12-17 22:52:17,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 22:52:17,098 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 22:52:17,098 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 22:52:17,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 22:52:17,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-12-17 22:52:17,099 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 117 [2021-12-17 22:52:17,100 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 100 transitions, 244 flow. Second operand has 7 states, 7 states have (on average 86.28571428571429) internal successors, (604), 7 states have internal predecessors, (604), 0 states have call successors, (0), 0 states 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 22:52:17,100 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 22:52:17,100 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 117 [2021-12-17 22:52:17,100 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 22:52:17,179 INFO L129 PetriNetUnfolder]: 58/226 cut-off events. [2021-12-17 22:52:17,180 INFO L130 PetriNetUnfolder]: For 57/57 co-relation queries the response was YES. [2021-12-17 22:52:17,180 INFO L84 FinitePrefix]: Finished finitePrefix Result has 442 conditions, 226 events. 58/226 cut-off events. For 57/57 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 635 event pairs, 13 based on Foata normal form. 8/229 useless extension candidates. Maximal degree in co-relation 432. Up to 65 conditions per place. [2021-12-17 22:52:17,181 INFO L132 encePairwiseOnDemand]: 109/117 looper letters, 30 selfloop transitions, 7 changer transitions 0/107 dead transitions. [2021-12-17 22:52:17,181 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 107 transitions, 341 flow [2021-12-17 22:52:17,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 22:52:17,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-12-17 22:52:17,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 615 transitions. [2021-12-17 22:52:17,183 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7509157509157509 [2021-12-17 22:52:17,183 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 615 transitions. [2021-12-17 22:52:17,183 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 615 transitions. [2021-12-17 22:52:17,183 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 22:52:17,183 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 615 transitions. [2021-12-17 22:52:17,184 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 87.85714285714286) internal successors, (615), 7 states have internal predecessors, (615), 0 states have call successors, (0), 0 states 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 22:52:17,185 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 117.0) internal successors, (936), 8 states have internal predecessors, (936), 0 states have call successors, (0), 0 states 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 22:52:17,186 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 117.0) internal successors, (936), 8 states have internal predecessors, (936), 0 states have call successors, (0), 0 states 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 22:52:17,186 INFO L186 Difference]: Start difference. First operand has 115 places, 100 transitions, 244 flow. Second operand 7 states and 615 transitions. [2021-12-17 22:52:17,186 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 107 transitions, 341 flow [2021-12-17 22:52:17,188 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 107 transitions, 315 flow, removed 7 selfloop flow, removed 9 redundant places. [2021-12-17 22:52:17,189 INFO L242 Difference]: Finished difference. Result has 111 places, 102 transitions, 255 flow [2021-12-17 22:52:17,189 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=222, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=255, PETRI_PLACES=111, PETRI_TRANSITIONS=102} [2021-12-17 22:52:17,190 INFO L334 CegarLoopForPetriNet]: 104 programPoint places, 7 predicate places. [2021-12-17 22:52:17,190 INFO L470 AbstractCegarLoop]: Abstraction has has 111 places, 102 transitions, 255 flow [2021-12-17 22:52:17,190 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 86.28571428571429) internal successors, (604), 7 states have internal predecessors, (604), 0 states have call successors, (0), 0 states 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 22:52:17,190 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 22:52:17,190 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 22:52:17,212 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 22:52:17,423 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 22:52:17,427 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 22:52:17,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 22:52:17,427 INFO L85 PathProgramCache]: Analyzing trace with hash 448445266, now seen corresponding path program 1 times [2021-12-17 22:52:17,427 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 22:52:17,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598340546] [2021-12-17 22:52:17,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 22:52:17,428 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 22:52:17,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 22:52:17,534 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-17 22:52:17,535 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 22:52:17,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598340546] [2021-12-17 22:52:17,535 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598340546] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 22:52:17,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838599858] [2021-12-17 22:52:17,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 22:52:17,535 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 22:52:17,536 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 22:52:17,537 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 22:52:17,537 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 22:52:17,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 22:52:17,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-17 22:52:17,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 22:52:17,806 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-17 22:52:17,806 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 22:52:18,065 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-17 22:52:18,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1838599858] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-17 22:52:18,066 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-17 22:52:18,066 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8, 7] total 14 [2021-12-17 22:52:18,066 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335185641] [2021-12-17 22:52:18,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 22:52:18,067 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 22:52:18,067 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 22:52:18,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 22:52:18,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-12-17 22:52:18,068 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 117 [2021-12-17 22:52:18,069 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 102 transitions, 255 flow. Second operand has 7 states, 7 states have (on average 86.28571428571429) internal successors, (604), 7 states have internal predecessors, (604), 0 states have call successors, (0), 0 states 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 22:52:18,069 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 22:52:18,069 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 117 [2021-12-17 22:52:18,069 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 22:52:18,139 INFO L129 PetriNetUnfolder]: 46/209 cut-off events. [2021-12-17 22:52:18,140 INFO L130 PetriNetUnfolder]: For 65/80 co-relation queries the response was YES. [2021-12-17 22:52:18,140 INFO L84 FinitePrefix]: Finished finitePrefix Result has 406 conditions, 209 events. 46/209 cut-off events. For 65/80 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 520 event pairs, 9 based on Foata normal form. 15/211 useless extension candidates. Maximal degree in co-relation 397. Up to 54 conditions per place. [2021-12-17 22:52:18,141 INFO L132 encePairwiseOnDemand]: 109/117 looper letters, 32 selfloop transitions, 7 changer transitions 0/109 dead transitions. [2021-12-17 22:52:18,141 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 109 transitions, 360 flow [2021-12-17 22:52:18,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 22:52:18,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-12-17 22:52:18,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 615 transitions. [2021-12-17 22:52:18,143 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7509157509157509 [2021-12-17 22:52:18,143 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 615 transitions. [2021-12-17 22:52:18,143 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 615 transitions. [2021-12-17 22:52:18,143 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 22:52:18,143 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 615 transitions. [2021-12-17 22:52:18,144 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 87.85714285714286) internal successors, (615), 7 states have internal predecessors, (615), 0 states have call successors, (0), 0 states 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 22:52:18,145 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 117.0) internal successors, (936), 8 states have internal predecessors, (936), 0 states have call successors, (0), 0 states 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 22:52:18,145 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 117.0) internal successors, (936), 8 states have internal predecessors, (936), 0 states have call successors, (0), 0 states 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 22:52:18,146 INFO L186 Difference]: Start difference. First operand has 111 places, 102 transitions, 255 flow. Second operand 7 states and 615 transitions. [2021-12-17 22:52:18,146 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 109 transitions, 360 flow [2021-12-17 22:52:18,147 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 109 transitions, 351 flow, removed 0 selfloop flow, removed 4 redundant places. [2021-12-17 22:52:18,148 INFO L242 Difference]: Finished difference. Result has 115 places, 103 transitions, 274 flow [2021-12-17 22:52:18,148 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=247, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=274, PETRI_PLACES=115, PETRI_TRANSITIONS=103} [2021-12-17 22:52:18,149 INFO L334 CegarLoopForPetriNet]: 104 programPoint places, 11 predicate places. [2021-12-17 22:52:18,149 INFO L470 AbstractCegarLoop]: Abstraction has has 115 places, 103 transitions, 274 flow [2021-12-17 22:52:18,149 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 86.28571428571429) internal successors, (604), 7 states have internal predecessors, (604), 0 states have call successors, (0), 0 states 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 22:52:18,149 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 22:52:18,149 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 22:52:18,181 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-17 22:52:18,363 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,SelfDestructingSolverStorable5 [2021-12-17 22:52:18,363 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 22:52:18,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 22:52:18,364 INFO L85 PathProgramCache]: Analyzing trace with hash 273222300, now seen corresponding path program 1 times [2021-12-17 22:52:18,364 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 22:52:18,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071682564] [2021-12-17 22:52:18,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 22:52:18,364 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 22:52:18,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 22:52:18,717 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-17 22:52:18,718 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 22:52:18,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071682564] [2021-12-17 22:52:18,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071682564] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 22:52:18,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945197472] [2021-12-17 22:52:18,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 22:52:18,718 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 22:52:18,718 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 22:52:18,719 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 22:52:18,720 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 22:52:18,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 22:52:18,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 45 conjunts are in the unsatisfiable core [2021-12-17 22:52:18,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 22:52:19,187 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-17 22:52:19,187 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 22:52:19,274 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-17 22:52:19,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 22 [2021-12-17 22:52:19,413 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-17 22:52:19,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [945197472] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 22:52:19,414 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 22:52:19,414 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 8] total 17 [2021-12-17 22:52:19,414 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444881930] [2021-12-17 22:52:19,414 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 22:52:19,414 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-17 22:52:19,415 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 22:52:19,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-17 22:52:19,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-12-17 22:52:19,417 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 117 [2021-12-17 22:52:19,417 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 103 transitions, 274 flow. Second operand has 17 states, 17 states have (on average 64.11764705882354) internal successors, (1090), 17 states have internal predecessors, (1090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:52:19,418 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 22:52:19,418 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 117 [2021-12-17 22:52:19,418 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 22:52:19,761 INFO L129 PetriNetUnfolder]: 325/771 cut-off events. [2021-12-17 22:52:19,761 INFO L130 PetriNetUnfolder]: For 502/502 co-relation queries the response was YES. [2021-12-17 22:52:19,763 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1856 conditions, 771 events. 325/771 cut-off events. For 502/502 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 3856 event pairs, 96 based on Foata normal form. 1/764 useless extension candidates. Maximal degree in co-relation 1845. Up to 326 conditions per place. [2021-12-17 22:52:19,766 INFO L132 encePairwiseOnDemand]: 100/117 looper letters, 79 selfloop transitions, 25 changer transitions 4/160 dead transitions. [2021-12-17 22:52:19,766 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 160 transitions, 693 flow [2021-12-17 22:52:19,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-17 22:52:19,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2021-12-17 22:52:19,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1247 transitions. [2021-12-17 22:52:19,768 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5609536662168241 [2021-12-17 22:52:19,769 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1247 transitions. [2021-12-17 22:52:19,769 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1247 transitions. [2021-12-17 22:52:19,769 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 22:52:19,769 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1247 transitions. [2021-12-17 22:52:19,771 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 65.63157894736842) internal successors, (1247), 19 states have internal predecessors, (1247), 0 states have call successors, (0), 0 states 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 22:52:19,774 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 117.0) internal successors, (2340), 20 states have internal predecessors, (2340), 0 states have call successors, (0), 0 states 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 22:52:19,774 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 117.0) internal successors, (2340), 20 states have internal predecessors, (2340), 0 states have call successors, (0), 0 states 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 22:52:19,774 INFO L186 Difference]: Start difference. First operand has 115 places, 103 transitions, 274 flow. Second operand 19 states and 1247 transitions. [2021-12-17 22:52:19,774 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 160 transitions, 693 flow [2021-12-17 22:52:19,776 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 160 transitions, 675 flow, removed 0 selfloop flow, removed 5 redundant places. [2021-12-17 22:52:19,778 INFO L242 Difference]: Finished difference. Result has 135 places, 118 transitions, 417 flow [2021-12-17 22:52:19,778 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=264, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=417, PETRI_PLACES=135, PETRI_TRANSITIONS=118} [2021-12-17 22:52:19,779 INFO L334 CegarLoopForPetriNet]: 104 programPoint places, 31 predicate places. [2021-12-17 22:52:19,779 INFO L470 AbstractCegarLoop]: Abstraction has has 135 places, 118 transitions, 417 flow [2021-12-17 22:52:19,780 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 64.11764705882354) internal successors, (1090), 17 states have internal predecessors, (1090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:52:19,780 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 22:52:19,780 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 22:52:19,802 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 22:52:20,000 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 22:52:20,001 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 22:52:20,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 22:52:20,002 INFO L85 PathProgramCache]: Analyzing trace with hash 678588484, now seen corresponding path program 2 times [2021-12-17 22:52:20,002 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 22:52:20,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959005093] [2021-12-17 22:52:20,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 22:52:20,002 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 22:52:20,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 22:52:20,274 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-17 22:52:20,275 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 22:52:20,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959005093] [2021-12-17 22:52:20,275 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959005093] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 22:52:20,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017499787] [2021-12-17 22:52:20,275 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 22:52:20,275 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 22:52:20,275 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 22:52:20,288 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 22:52:20,290 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 22:52:20,361 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 22:52:20,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 22:52:20,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 56 conjunts are in the unsatisfiable core [2021-12-17 22:52:20,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 22:52:20,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 22:52:20,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-17 22:52:20,952 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-17 22:52:20,952 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 22:52:21,034 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_137 (Array Int Int))) (= c_~counter~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_137) c_~A~0.base) c_~A~0.offset))) is different from false [2021-12-17 22:52:21,045 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-17 22:52:21,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 34 [2021-12-17 22:52:21,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-12-17 22:52:21,358 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-17 22:52:21,358 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1017499787] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 22:52:21,358 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 22:52:21,359 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15, 15] total 34 [2021-12-17 22:52:21,359 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745894685] [2021-12-17 22:52:21,359 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 22:52:21,359 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-12-17 22:52:21,359 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 22:52:21,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-12-17 22:52:21,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=937, Unknown=1, NotChecked=62, Total=1122 [2021-12-17 22:52:21,362 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 117 [2021-12-17 22:52:21,363 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 118 transitions, 417 flow. Second operand has 34 states, 34 states have (on average 57.94117647058823) internal successors, (1970), 34 states have internal predecessors, (1970), 0 states have call successors, (0), 0 states 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 22:52:21,363 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 22:52:21,363 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 117 [2021-12-17 22:52:21,363 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 22:52:22,137 INFO L129 PetriNetUnfolder]: 533/1183 cut-off events. [2021-12-17 22:52:22,137 INFO L130 PetriNetUnfolder]: For 1329/1329 co-relation queries the response was YES. [2021-12-17 22:52:22,140 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3263 conditions, 1183 events. 533/1183 cut-off events. For 1329/1329 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 7006 event pairs, 48 based on Foata normal form. 1/1171 useless extension candidates. Maximal degree in co-relation 3245. Up to 522 conditions per place. [2021-12-17 22:52:22,144 INFO L132 encePairwiseOnDemand]: 96/117 looper letters, 99 selfloop transitions, 52 changer transitions 4/204 dead transitions. [2021-12-17 22:52:22,144 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 204 transitions, 1076 flow [2021-12-17 22:52:22,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-17 22:52:22,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2021-12-17 22:52:22,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1459 transitions. [2021-12-17 22:52:22,147 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5195868945868946 [2021-12-17 22:52:22,147 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1459 transitions. [2021-12-17 22:52:22,147 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1459 transitions. [2021-12-17 22:52:22,148 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 22:52:22,148 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1459 transitions. [2021-12-17 22:52:22,150 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 60.791666666666664) internal successors, (1459), 24 states have internal predecessors, (1459), 0 states have call successors, (0), 0 states 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 22:52:22,153 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 117.0) internal successors, (2925), 25 states have internal predecessors, (2925), 0 states have call successors, (0), 0 states 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 22:52:22,153 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 117.0) internal successors, (2925), 25 states have internal predecessors, (2925), 0 states have call successors, (0), 0 states 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 22:52:22,153 INFO L186 Difference]: Start difference. First operand has 135 places, 118 transitions, 417 flow. Second operand 24 states and 1459 transitions. [2021-12-17 22:52:22,154 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 204 transitions, 1076 flow [2021-12-17 22:52:22,157 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 204 transitions, 1004 flow, removed 22 selfloop flow, removed 11 redundant places. [2021-12-17 22:52:22,159 INFO L242 Difference]: Finished difference. Result has 155 places, 152 transitions, 698 flow [2021-12-17 22:52:22,159 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=371, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=698, PETRI_PLACES=155, PETRI_TRANSITIONS=152} [2021-12-17 22:52:22,159 INFO L334 CegarLoopForPetriNet]: 104 programPoint places, 51 predicate places. [2021-12-17 22:52:22,160 INFO L470 AbstractCegarLoop]: Abstraction has has 155 places, 152 transitions, 698 flow [2021-12-17 22:52:22,160 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 57.94117647058823) internal successors, (1970), 34 states have internal predecessors, (1970), 0 states have call successors, (0), 0 states 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 22:52:22,160 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 22:52:22,161 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 22:52:22,194 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-17 22:52:22,377 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 22:52:22,378 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 22:52:22,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 22:52:22,378 INFO L85 PathProgramCache]: Analyzing trace with hash 646765682, now seen corresponding path program 3 times [2021-12-17 22:52:22,378 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 22:52:22,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338510349] [2021-12-17 22:52:22,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 22:52:22,379 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 22:52:22,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 22:52:22,652 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-17 22:52:22,652 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 22:52:22,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338510349] [2021-12-17 22:52:22,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338510349] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 22:52:22,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [3785933] [2021-12-17 22:52:22,653 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-17 22:52:22,653 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 22:52:22,653 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 22:52:22,654 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 22:52:22,655 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 22:52:22,724 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-12-17 22:52:22,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 22:52:22,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 58 conjunts are in the unsatisfiable core [2021-12-17 22:52:22,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 22:52:23,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-17 22:52:23,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-17 22:52:23,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 22:52:23,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-17 22:52:23,369 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 22:52:23,370 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 22:52:23,435 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_165 (Array Int Int))) (= c_~counter~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_165) c_~A~0.base) c_~A~0.offset))) is different from false [2021-12-17 22:52:23,460 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_165 (Array Int Int))) (= (+ c_~counter~0 (select (select |c_#memory_int| c_~A~0.base) (+ c_~A~0.offset (* |c_thread1Thread1of1ForFork0_~i~0#1| 4)))) (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_165) c_~A~0.base) c_~A~0.offset))) is different from false [2021-12-17 22:52:23,467 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_165 (Array Int Int))) (= (+ c_~counter~0 (select (select |c_#memory_int| c_~A~0.base) c_~A~0.offset)) (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_165) c_~A~0.base) c_~A~0.offset))) is different from false [2021-12-17 22:52:23,491 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_164 (Array Int Int)) (v_ArrVal_165 (Array Int Int))) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_164))) (= (+ (select (select .cse0 c_~A~0.base) c_~A~0.offset) c_~counter~0) (select (select (store .cse0 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_165) c_~A~0.base) c_~A~0.offset)))) is different from false [2021-12-17 22:52:23,505 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_164 (Array Int Int)) (v_ArrVal_165 (Array Int Int))) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_164))) (= (+ c_~counter~0 (select (select .cse0 |c_ULTIMATE.start_main_#t~ret8#1.base|) |c_ULTIMATE.start_main_#t~ret8#1.offset|)) (select (select (store .cse0 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_165) |c_ULTIMATE.start_main_#t~ret8#1.base|) |c_ULTIMATE.start_main_#t~ret8#1.offset|)))) is different from false [2021-12-17 22:52:23,514 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_164 (Array Int Int)) (v_ArrVal_165 (Array Int Int))) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_164))) (= (+ c_~counter~0 (select (select .cse0 |c_ULTIMATE.start_create_fresh_int_array_#res#1.base|) |c_ULTIMATE.start_create_fresh_int_array_#res#1.offset|)) (select (select (store .cse0 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_165) |c_ULTIMATE.start_create_fresh_int_array_#res#1.base|) |c_ULTIMATE.start_create_fresh_int_array_#res#1.offset|)))) is different from false [2021-12-17 22:52:23,521 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_164 (Array Int Int)) (v_ArrVal_165 (Array Int Int))) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_164))) (= (+ c_~counter~0 (select (select .cse0 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) (select (select (store .cse0 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_165) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)))) is different from false [2021-12-17 22:52:23,555 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-17 22:52:23,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 35 [2021-12-17 22:52:23,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 318 treesize of output 270 [2021-12-17 22:52:23,561 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 270 treesize of output 246 [2021-12-17 22:52:23,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 246 treesize of output 230 [2021-12-17 22:52:23,837 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2021-12-17 22:52:23,837 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [3785933] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 22:52:23,837 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 22:52:23,837 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 17] total 41 [2021-12-17 22:52:23,837 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797438936] [2021-12-17 22:52:23,837 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 22:52:23,838 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-12-17 22:52:23,838 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 22:52:23,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-12-17 22:52:23,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=1019, Unknown=7, NotChecked=490, Total=1640 [2021-12-17 22:52:23,841 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 117 [2021-12-17 22:52:23,842 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 152 transitions, 698 flow. Second operand has 41 states, 41 states have (on average 48.26829268292683) internal successors, (1979), 41 states have internal predecessors, (1979), 0 states have call successors, (0), 0 states 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 22:52:23,842 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 22:52:23,842 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 117 [2021-12-17 22:52:23,842 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 22:52:25,485 INFO L129 PetriNetUnfolder]: 922/2013 cut-off events. [2021-12-17 22:52:25,486 INFO L130 PetriNetUnfolder]: For 3892/3925 co-relation queries the response was YES. [2021-12-17 22:52:25,491 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6659 conditions, 2013 events. 922/2013 cut-off events. For 3892/3925 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 14081 event pairs, 184 based on Foata normal form. 19/2013 useless extension candidates. Maximal degree in co-relation 6633. Up to 836 conditions per place. [2021-12-17 22:52:25,499 INFO L132 encePairwiseOnDemand]: 91/117 looper letters, 149 selfloop transitions, 93 changer transitions 5/286 dead transitions. [2021-12-17 22:52:25,500 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 286 transitions, 1927 flow [2021-12-17 22:52:25,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-17 22:52:25,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-12-17 22:52:25,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 1592 transitions. [2021-12-17 22:52:25,503 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.43893024538185826 [2021-12-17 22:52:25,503 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 1592 transitions. [2021-12-17 22:52:25,504 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 1592 transitions. [2021-12-17 22:52:25,504 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 22:52:25,504 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 1592 transitions. [2021-12-17 22:52:25,507 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 51.354838709677416) internal successors, (1592), 31 states have internal predecessors, (1592), 0 states have call successors, (0), 0 states 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 22:52:25,510 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 117.0) internal successors, (3744), 32 states have internal predecessors, (3744), 0 states have call successors, (0), 0 states 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 22:52:25,511 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 117.0) internal successors, (3744), 32 states have internal predecessors, (3744), 0 states have call successors, (0), 0 states 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 22:52:25,511 INFO L186 Difference]: Start difference. First operand has 155 places, 152 transitions, 698 flow. Second operand 31 states and 1592 transitions. [2021-12-17 22:52:25,511 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 286 transitions, 1927 flow [2021-12-17 22:52:25,519 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 286 transitions, 1853 flow, removed 26 selfloop flow, removed 11 redundant places. [2021-12-17 22:52:25,522 INFO L242 Difference]: Finished difference. Result has 179 places, 200 transitions, 1238 flow [2021-12-17 22:52:25,523 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=656, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=1238, PETRI_PLACES=179, PETRI_TRANSITIONS=200} [2021-12-17 22:52:25,523 INFO L334 CegarLoopForPetriNet]: 104 programPoint places, 75 predicate places. [2021-12-17 22:52:25,523 INFO L470 AbstractCegarLoop]: Abstraction has has 179 places, 200 transitions, 1238 flow [2021-12-17 22:52:25,524 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 48.26829268292683) internal successors, (1979), 41 states have internal predecessors, (1979), 0 states have call successors, (0), 0 states 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 22:52:25,524 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 22:52:25,524 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 22:52:25,541 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-17 22:52:25,741 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 22:52:25,741 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 22:52:25,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 22:52:25,742 INFO L85 PathProgramCache]: Analyzing trace with hash -10911420, now seen corresponding path program 4 times [2021-12-17 22:52:25,742 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 22:52:25,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590424075] [2021-12-17 22:52:25,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 22:52:25,742 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 22:52:25,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 22:52:25,994 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-17 22:52:25,994 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 22:52:25,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590424075] [2021-12-17 22:52:25,994 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590424075] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 22:52:25,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325177906] [2021-12-17 22:52:25,994 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-17 22:52:25,995 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 22:52:25,995 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 22:52:25,996 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 22:52:25,999 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 22:52:26,083 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-17 22:52:26,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 22:52:26,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 65 conjunts are in the unsatisfiable core [2021-12-17 22:52:26,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 22:52:26,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-17 22:52:26,138 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-17 22:52:26,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-12-17 22:52:26,338 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-17 22:52:26,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-12-17 22:52:26,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-17 22:52:26,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-17 22:52:26,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-17 22:52:26,886 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 22:52:26,886 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 22:52:26,990 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_195 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_195) c_~A~0.base))) (= (+ c_~counter~0 (select .cse0 (+ c_~A~0.offset (* |c_thread1Thread1of1ForFork0_~i~0#1| 4)))) (select .cse0 c_~A~0.offset)))) is different from false [2021-12-17 22:52:27,277 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-17 22:52:27,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [325177906] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 22:52:27,278 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 22:52:27,278 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 18, 11] total 33 [2021-12-17 22:52:27,278 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802328950] [2021-12-17 22:52:27,278 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 22:52:27,279 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-17 22:52:27,279 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 22:52:27,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-17 22:52:27,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=855, Unknown=1, NotChecked=60, Total=1056 [2021-12-17 22:52:27,280 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 117 [2021-12-17 22:52:27,282 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 200 transitions, 1238 flow. Second operand has 33 states, 33 states have (on average 49.15151515151515) internal successors, (1622), 33 states have internal predecessors, (1622), 0 states have call successors, (0), 0 states 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 22:52:27,282 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 22:52:27,282 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 117 [2021-12-17 22:52:27,282 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 22:52:28,394 INFO L129 PetriNetUnfolder]: 1707/3686 cut-off events. [2021-12-17 22:52:28,394 INFO L130 PetriNetUnfolder]: For 10550/10609 co-relation queries the response was YES. [2021-12-17 22:52:28,408 INFO L84 FinitePrefix]: Finished finitePrefix Result has 13705 conditions, 3686 events. 1707/3686 cut-off events. For 10550/10609 co-relation queries the response was YES. Maximal size of possible extension queue 314. Compared 30146 event pairs, 597 based on Foata normal form. 21/3669 useless extension candidates. Maximal degree in co-relation 13674. Up to 1778 conditions per place. [2021-12-17 22:52:28,427 INFO L132 encePairwiseOnDemand]: 94/117 looper letters, 227 selfloop transitions, 104 changer transitions 5/375 dead transitions. [2021-12-17 22:52:28,428 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 375 transitions, 3196 flow [2021-12-17 22:52:28,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-12-17 22:52:28,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2021-12-17 22:52:28,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 1281 transitions. [2021-12-17 22:52:28,431 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.4379487179487179 [2021-12-17 22:52:28,431 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 1281 transitions. [2021-12-17 22:52:28,431 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 1281 transitions. [2021-12-17 22:52:28,432 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 22:52:28,432 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 1281 transitions. [2021-12-17 22:52:28,436 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 51.24) internal successors, (1281), 25 states have internal predecessors, (1281), 0 states have call successors, (0), 0 states 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 22:52:28,440 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 117.0) internal successors, (3042), 26 states have internal predecessors, (3042), 0 states have call successors, (0), 0 states 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 22:52:28,441 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 117.0) internal successors, (3042), 26 states have internal predecessors, (3042), 0 states have call successors, (0), 0 states 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 22:52:28,441 INFO L186 Difference]: Start difference. First operand has 179 places, 200 transitions, 1238 flow. Second operand 25 states and 1281 transitions. [2021-12-17 22:52:28,441 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 375 transitions, 3196 flow [2021-12-17 22:52:28,462 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 375 transitions, 3077 flow, removed 33 selfloop flow, removed 16 redundant places. [2021-12-17 22:52:28,543 INFO L242 Difference]: Finished difference. Result has 196 places, 289 transitions, 2344 flow [2021-12-17 22:52:28,543 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=1163, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=2344, PETRI_PLACES=196, PETRI_TRANSITIONS=289} [2021-12-17 22:52:28,544 INFO L334 CegarLoopForPetriNet]: 104 programPoint places, 92 predicate places. [2021-12-17 22:52:28,544 INFO L470 AbstractCegarLoop]: Abstraction has has 196 places, 289 transitions, 2344 flow [2021-12-17 22:52:28,544 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 49.15151515151515) internal successors, (1622), 33 states have internal predecessors, (1622), 0 states have call successors, (0), 0 states 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 22:52:28,544 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 22:52:28,544 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 22:52:28,586 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-17 22:52:28,755 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 22:52:28,755 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 22:52:28,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 22:52:28,756 INFO L85 PathProgramCache]: Analyzing trace with hash 360099050, now seen corresponding path program 5 times [2021-12-17 22:52:28,756 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 22:52:28,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294487082] [2021-12-17 22:52:28,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 22:52:28,756 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 22:52:28,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 22:52:29,241 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-17 22:52:29,241 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 22:52:29,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294487082] [2021-12-17 22:52:29,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294487082] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 22:52:29,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601169709] [2021-12-17 22:52:29,242 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-17 22:52:29,242 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 22:52:29,242 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 22:52:29,243 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 22:52:29,244 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 22:52:29,322 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 22:52:29,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 22:52:29,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 61 conjunts are in the unsatisfiable core [2021-12-17 22:52:29,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 22:52:29,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-17 22:52:29,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-17 22:52:29,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 22:52:29,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-17 22:52:30,138 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 22:52:30,138 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 22:52:30,268 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_223 (Array Int Int))) (= c_~counter~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_223) c_~A~0.base) c_~A~0.offset))) is different from false [2021-12-17 22:52:30,274 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_223 (Array Int Int))) (= (+ c_~counter~0 (select (select |c_#memory_int| c_~A~0.base) (+ c_~A~0.offset (* |c_thread1Thread1of1ForFork0_~i~0#1| 4)))) (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_223) c_~A~0.base) c_~A~0.offset))) is different from false [2021-12-17 22:52:30,281 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_223 (Array Int Int))) (= (+ c_~counter~0 (select (select |c_#memory_int| c_~A~0.base) c_~A~0.offset)) (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_223) c_~A~0.base) c_~A~0.offset))) is different from false [2021-12-17 22:52:30,298 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_223 (Array Int Int)) (v_ArrVal_222 (Array Int Int))) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_222))) (= (+ c_~counter~0 (select (select .cse0 c_~A~0.base) c_~A~0.offset)) (select (select (store .cse0 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_223) c_~A~0.base) c_~A~0.offset)))) is different from false [2021-12-17 22:52:30,310 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_223 (Array Int Int)) (v_ArrVal_222 (Array Int Int))) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_222))) (= (+ c_~counter~0 (select (select .cse0 |c_ULTIMATE.start_main_#t~ret8#1.base|) |c_ULTIMATE.start_main_#t~ret8#1.offset|)) (select (select (store .cse0 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_223) |c_ULTIMATE.start_main_#t~ret8#1.base|) |c_ULTIMATE.start_main_#t~ret8#1.offset|)))) is different from false [2021-12-17 22:52:30,318 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_223 (Array Int Int)) (v_ArrVal_222 (Array Int Int))) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_222))) (= (+ c_~counter~0 (select (select .cse0 |c_ULTIMATE.start_create_fresh_int_array_#res#1.base|) |c_ULTIMATE.start_create_fresh_int_array_#res#1.offset|)) (select (select (store .cse0 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_223) |c_ULTIMATE.start_create_fresh_int_array_#res#1.base|) |c_ULTIMATE.start_create_fresh_int_array_#res#1.offset|)))) is different from false [2021-12-17 22:52:30,322 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_223 (Array Int Int)) (v_ArrVal_222 (Array Int Int))) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_222))) (= (+ c_~counter~0 (select (select .cse0 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) (select (select (store .cse0 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_223) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)))) is different from false [2021-12-17 22:52:30,339 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-17 22:52:30,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 35 [2021-12-17 22:52:30,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 154 treesize of output 130 [2021-12-17 22:52:30,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 130 treesize of output 118 [2021-12-17 22:52:30,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 118 treesize of output 110 [2021-12-17 22:52:30,578 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2021-12-17 22:52:30,579 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [601169709] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 22:52:30,579 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 22:52:30,579 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 17] total 41 [2021-12-17 22:52:30,579 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512123315] [2021-12-17 22:52:30,579 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 22:52:30,580 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-12-17 22:52:30,580 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 22:52:30,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-12-17 22:52:30,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=1004, Unknown=7, NotChecked=490, Total=1640 [2021-12-17 22:52:30,582 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 117 [2021-12-17 22:52:30,584 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 289 transitions, 2344 flow. Second operand has 41 states, 41 states have (on average 51.34146341463415) internal successors, (2105), 41 states have internal predecessors, (2105), 0 states have call successors, (0), 0 states 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 22:52:30,592 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 22:52:30,593 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 117 [2021-12-17 22:52:30,593 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 22:52:32,033 INFO L129 PetriNetUnfolder]: 1777/3850 cut-off events. [2021-12-17 22:52:32,034 INFO L130 PetriNetUnfolder]: For 14269/14335 co-relation queries the response was YES. [2021-12-17 22:52:32,051 INFO L84 FinitePrefix]: Finished finitePrefix Result has 15395 conditions, 3850 events. 1777/3850 cut-off events. For 14269/14335 co-relation queries the response was YES. Maximal size of possible extension queue 333. Compared 31881 event pairs, 78 based on Foata normal form. 26/3865 useless extension candidates. Maximal degree in co-relation 15354. Up to 862 conditions per place. [2021-12-17 22:52:32,072 INFO L132 encePairwiseOnDemand]: 96/117 looper letters, 127 selfloop transitions, 201 changer transitions 4/374 dead transitions. [2021-12-17 22:52:32,072 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 374 transitions, 3652 flow [2021-12-17 22:52:32,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-12-17 22:52:32,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2021-12-17 22:52:32,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 1388 transitions. [2021-12-17 22:52:32,075 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.45627876397107164 [2021-12-17 22:52:32,075 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 1388 transitions. [2021-12-17 22:52:32,075 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 1388 transitions. [2021-12-17 22:52:32,076 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 22:52:32,076 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 1388 transitions. [2021-12-17 22:52:32,078 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 53.38461538461539) internal successors, (1388), 26 states have internal predecessors, (1388), 0 states have call successors, (0), 0 states 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 22:52:32,082 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 117.0) internal successors, (3159), 27 states have internal predecessors, (3159), 0 states have call successors, (0), 0 states 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 22:52:32,082 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 117.0) internal successors, (3159), 27 states have internal predecessors, (3159), 0 states have call successors, (0), 0 states 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 22:52:32,082 INFO L186 Difference]: Start difference. First operand has 196 places, 289 transitions, 2344 flow. Second operand 26 states and 1388 transitions. [2021-12-17 22:52:32,082 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 374 transitions, 3652 flow [2021-12-17 22:52:32,119 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 374 transitions, 3564 flow, removed 34 selfloop flow, removed 11 redundant places. [2021-12-17 22:52:32,123 INFO L242 Difference]: Finished difference. Result has 211 places, 321 transitions, 3057 flow [2021-12-17 22:52:32,125 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=2258, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=289, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=173, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=3057, PETRI_PLACES=211, PETRI_TRANSITIONS=321} [2021-12-17 22:52:32,125 INFO L334 CegarLoopForPetriNet]: 104 programPoint places, 107 predicate places. [2021-12-17 22:52:32,125 INFO L470 AbstractCegarLoop]: Abstraction has has 211 places, 321 transitions, 3057 flow [2021-12-17 22:52:32,126 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 51.34146341463415) internal successors, (2105), 41 states have internal predecessors, (2105), 0 states have call successors, (0), 0 states 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 22:52:32,126 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 22:52:32,126 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 22:52:32,144 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-12-17 22:52:32,339 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 22:52:32,339 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 22:52:32,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 22:52:32,340 INFO L85 PathProgramCache]: Analyzing trace with hash 430332340, now seen corresponding path program 6 times [2021-12-17 22:52:32,341 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 22:52:32,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722862626] [2021-12-17 22:52:32,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 22:52:32,341 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 22:52:32,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 22:52:32,594 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-17 22:52:32,595 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 22:52:32,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722862626] [2021-12-17 22:52:32,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722862626] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 22:52:32,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891609043] [2021-12-17 22:52:32,595 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-17 22:52:32,595 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 22:52:32,595 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 22:52:32,608 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 22:52:32,609 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-17 22:52:32,680 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-12-17 22:52:32,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 22:52:32,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 45 conjunts are in the unsatisfiable core [2021-12-17 22:52:32,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 22:52:33,041 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-17 22:52:33,041 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 22:52:33,171 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-17 22:52:33,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 22 [2021-12-17 22:52:33,366 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-17 22:52:33,367 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [891609043] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 22:52:33,371 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 22:52:33,371 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 8] total 17 [2021-12-17 22:52:33,371 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168067046] [2021-12-17 22:52:33,377 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 22:52:33,378 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-17 22:52:33,378 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 22:52:33,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-17 22:52:33,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-12-17 22:52:33,379 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 117 [2021-12-17 22:52:33,380 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 321 transitions, 3057 flow. Second operand has 17 states, 17 states have (on average 64.29411764705883) internal successors, (1093), 17 states have internal predecessors, (1093), 0 states have call successors, (0), 0 states 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 22:52:33,380 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 22:52:33,380 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 117 [2021-12-17 22:52:33,380 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 22:52:34,141 INFO L129 PetriNetUnfolder]: 1892/4100 cut-off events. [2021-12-17 22:52:34,142 INFO L130 PetriNetUnfolder]: For 19225/19292 co-relation queries the response was YES. [2021-12-17 22:52:34,156 INFO L84 FinitePrefix]: Finished finitePrefix Result has 17364 conditions, 4100 events. 1892/4100 cut-off events. For 19225/19292 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 34666 event pairs, 815 based on Foata normal form. 18/4072 useless extension candidates. Maximal degree in co-relation 17321. Up to 3020 conditions per place. [2021-12-17 22:52:34,174 INFO L132 encePairwiseOnDemand]: 100/117 looper letters, 281 selfloop transitions, 32 changer transitions 4/369 dead transitions. [2021-12-17 22:52:34,174 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 369 transitions, 4046 flow [2021-12-17 22:52:34,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-17 22:52:34,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2021-12-17 22:52:34,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1245 transitions. [2021-12-17 22:52:34,176 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5600539811066126 [2021-12-17 22:52:34,176 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1245 transitions. [2021-12-17 22:52:34,176 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1245 transitions. [2021-12-17 22:52:34,176 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 22:52:34,177 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1245 transitions. [2021-12-17 22:52:34,178 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 65.52631578947368) internal successors, (1245), 19 states have internal predecessors, (1245), 0 states have call successors, (0), 0 states 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 22:52:34,192 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 117.0) internal successors, (2340), 20 states have internal predecessors, (2340), 0 states have call successors, (0), 0 states 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 22:52:34,193 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 117.0) internal successors, (2340), 20 states have internal predecessors, (2340), 0 states have call successors, (0), 0 states 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 22:52:34,193 INFO L186 Difference]: Start difference. First operand has 211 places, 321 transitions, 3057 flow. Second operand 19 states and 1245 transitions. [2021-12-17 22:52:34,193 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 369 transitions, 4046 flow [2021-12-17 22:52:34,241 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 369 transitions, 3883 flow, removed 53 selfloop flow, removed 17 redundant places. [2021-12-17 22:52:34,245 INFO L242 Difference]: Finished difference. Result has 215 places, 331 transitions, 3121 flow [2021-12-17 22:52:34,246 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=2946, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=321, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=295, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=3121, PETRI_PLACES=215, PETRI_TRANSITIONS=331} [2021-12-17 22:52:34,247 INFO L334 CegarLoopForPetriNet]: 104 programPoint places, 111 predicate places. [2021-12-17 22:52:34,247 INFO L470 AbstractCegarLoop]: Abstraction has has 215 places, 331 transitions, 3121 flow [2021-12-17 22:52:34,248 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 64.29411764705883) internal successors, (1093), 17 states have internal predecessors, (1093), 0 states have call successors, (0), 0 states 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 22:52:34,248 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 22:52:34,248 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 22:52:34,264 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-17 22:52:34,469 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-12-17 22:52:34,469 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 22:52:34,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 22:52:34,469 INFO L85 PathProgramCache]: Analyzing trace with hash -1092071530, now seen corresponding path program 7 times [2021-12-17 22:52:34,469 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 22:52:34,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674413411] [2021-12-17 22:52:34,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 22:52:34,470 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 22:52:34,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 22:52:34,788 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-17 22:52:34,789 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 22:52:34,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674413411] [2021-12-17 22:52:34,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674413411] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 22:52:34,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951815241] [2021-12-17 22:52:34,789 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-17 22:52:34,789 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 22:52:34,789 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 22:52:34,790 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 22:52:34,802 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-17 22:52:34,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 22:52:34,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 63 conjunts are in the unsatisfiable core [2021-12-17 22:52:34,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 22:52:34,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-17 22:52:34,943 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-17 22:52:34,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2021-12-17 22:52:35,187 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-17 22:52:35,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-12-17 22:52:35,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-17 22:52:35,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-17 22:52:35,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-17 22:52:35,600 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 22:52:35,600 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 22:52:38,023 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-17 22:52:38,024 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1951815241] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 22:52:38,024 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 22:52:38,024 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17, 10] total 32 [2021-12-17 22:52:38,024 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340223912] [2021-12-17 22:52:38,024 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 22:52:38,025 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-12-17 22:52:38,025 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 22:52:38,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-12-17 22:52:38,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=848, Unknown=1, NotChecked=0, Total=992 [2021-12-17 22:52:38,030 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 117 [2021-12-17 22:52:38,032 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 331 transitions, 3121 flow. Second operand has 32 states, 32 states have (on average 49.25) internal successors, (1576), 32 states have internal predecessors, (1576), 0 states have call successors, (0), 0 states 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 22:52:38,040 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 22:52:38,040 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 117 [2021-12-17 22:52:38,040 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 22:52:39,528 INFO L129 PetriNetUnfolder]: 2109/4576 cut-off events. [2021-12-17 22:52:39,528 INFO L130 PetriNetUnfolder]: For 18995/19062 co-relation queries the response was YES. [2021-12-17 22:52:39,549 INFO L84 FinitePrefix]: Finished finitePrefix Result has 18823 conditions, 4576 events. 2109/4576 cut-off events. For 18995/19062 co-relation queries the response was YES. Maximal size of possible extension queue 416. Compared 39676 event pairs, 827 based on Foata normal form. 19/4552 useless extension candidates. Maximal degree in co-relation 18777. Up to 3082 conditions per place. [2021-12-17 22:52:39,566 INFO L132 encePairwiseOnDemand]: 96/117 looper letters, 306 selfloop transitions, 58 changer transitions 8/411 dead transitions. [2021-12-17 22:52:39,566 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 411 transitions, 4415 flow [2021-12-17 22:52:39,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-12-17 22:52:39,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2021-12-17 22:52:39,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 1361 transitions. [2021-12-17 22:52:39,569 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.43083254194365306 [2021-12-17 22:52:39,569 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 1361 transitions. [2021-12-17 22:52:39,569 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 1361 transitions. [2021-12-17 22:52:39,569 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 22:52:39,569 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 1361 transitions. [2021-12-17 22:52:39,571 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 50.407407407407405) internal successors, (1361), 27 states have internal predecessors, (1361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:52:39,574 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 117.0) internal successors, (3276), 28 states have internal predecessors, (3276), 0 states have call successors, (0), 0 states 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 22:52:39,575 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 117.0) internal successors, (3276), 28 states have internal predecessors, (3276), 0 states have call successors, (0), 0 states 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 22:52:39,575 INFO L186 Difference]: Start difference. First operand has 215 places, 331 transitions, 3121 flow. Second operand 27 states and 1361 transitions. [2021-12-17 22:52:39,575 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 411 transitions, 4415 flow [2021-12-17 22:52:39,617 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 411 transitions, 4325 flow, removed 22 selfloop flow, removed 13 redundant places. [2021-12-17 22:52:39,622 INFO L242 Difference]: Finished difference. Result has 232 places, 352 transitions, 3411 flow [2021-12-17 22:52:39,623 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=3039, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=331, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=290, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=3411, PETRI_PLACES=232, PETRI_TRANSITIONS=352} [2021-12-17 22:52:39,623 INFO L334 CegarLoopForPetriNet]: 104 programPoint places, 128 predicate places. [2021-12-17 22:52:39,623 INFO L470 AbstractCegarLoop]: Abstraction has has 232 places, 352 transitions, 3411 flow [2021-12-17 22:52:39,624 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 49.25) internal successors, (1576), 32 states have internal predecessors, (1576), 0 states have call successors, (0), 0 states 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 22:52:39,624 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 22:52:39,624 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 22:52:39,653 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-17 22:52:39,841 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-12-17 22:52:39,841 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 22:52:39,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 22:52:39,841 INFO L85 PathProgramCache]: Analyzing trace with hash -1888463954, now seen corresponding path program 8 times [2021-12-17 22:52:39,841 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 22:52:39,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871816965] [2021-12-17 22:52:39,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 22:52:39,841 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 22:52:39,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 22:52:40,029 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-17 22:52:40,029 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 22:52:40,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871816965] [2021-12-17 22:52:40,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871816965] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 22:52:40,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760440281] [2021-12-17 22:52:40,029 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 22:52:40,029 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 22:52:40,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 22:52:40,036 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 22:52:40,074 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-17 22:52:40,174 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 22:52:40,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 22:52:40,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 45 conjunts are in the unsatisfiable core [2021-12-17 22:52:40,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 22:52:40,517 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-17 22:52:40,517 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 22:52:40,655 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-17 22:52:40,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 18 [2021-12-17 22:52:40,771 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-17 22:52:40,771 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1760440281] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 22:52:40,771 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 22:52:40,771 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 8] total 18 [2021-12-17 22:52:40,772 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130579057] [2021-12-17 22:52:40,772 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 22:52:40,772 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-17 22:52:40,772 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 22:52:40,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-17 22:52:40,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-12-17 22:52:40,773 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 117 [2021-12-17 22:52:40,774 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 352 transitions, 3411 flow. Second operand has 18 states, 18 states have (on average 64.05555555555556) internal successors, (1153), 18 states have internal predecessors, (1153), 0 states have call successors, (0), 0 states 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 22:52:40,774 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 22:52:40,774 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 117 [2021-12-17 22:52:40,774 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 22:52:41,942 INFO L129 PetriNetUnfolder]: 2239/4857 cut-off events. [2021-12-17 22:52:41,942 INFO L130 PetriNetUnfolder]: For 21167/21234 co-relation queries the response was YES. [2021-12-17 22:52:41,962 INFO L84 FinitePrefix]: Finished finitePrefix Result has 20195 conditions, 4857 events. 2239/4857 cut-off events. For 21167/21234 co-relation queries the response was YES. Maximal size of possible extension queue 445. Compared 42452 event pairs, 811 based on Foata normal form. 18/4834 useless extension candidates. Maximal degree in co-relation 20144. Up to 3104 conditions per place. [2021-12-17 22:52:42,017 INFO L132 encePairwiseOnDemand]: 100/117 looper letters, 289 selfloop transitions, 70 changer transitions 4/415 dead transitions. [2021-12-17 22:52:42,018 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 415 transitions, 4616 flow [2021-12-17 22:52:42,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-17 22:52:42,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2021-12-17 22:52:42,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1500 transitions. [2021-12-17 22:52:42,020 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5574136008918618 [2021-12-17 22:52:42,020 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 1500 transitions. [2021-12-17 22:52:42,020 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 1500 transitions. [2021-12-17 22:52:42,021 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 22:52:42,021 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 1500 transitions. [2021-12-17 22:52:42,023 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 65.21739130434783) internal successors, (1500), 23 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states 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 22:52:42,025 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 117.0) internal successors, (2808), 24 states have internal predecessors, (2808), 0 states have call successors, (0), 0 states 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 22:52:42,025 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 117.0) internal successors, (2808), 24 states have internal predecessors, (2808), 0 states have call successors, (0), 0 states 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 22:52:42,026 INFO L186 Difference]: Start difference. First operand has 232 places, 352 transitions, 3411 flow. Second operand 23 states and 1500 transitions. [2021-12-17 22:52:42,026 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 415 transitions, 4616 flow [2021-12-17 22:52:42,080 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 415 transitions, 4430 flow, removed 72 selfloop flow, removed 17 redundant places. [2021-12-17 22:52:42,085 INFO L242 Difference]: Finished difference. Result has 236 places, 368 transitions, 3606 flow [2021-12-17 22:52:42,086 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=3265, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=352, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=293, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=3606, PETRI_PLACES=236, PETRI_TRANSITIONS=368} [2021-12-17 22:52:42,087 INFO L334 CegarLoopForPetriNet]: 104 programPoint places, 132 predicate places. [2021-12-17 22:52:42,087 INFO L470 AbstractCegarLoop]: Abstraction has has 236 places, 368 transitions, 3606 flow [2021-12-17 22:52:42,088 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 64.05555555555556) internal successors, (1153), 18 states have internal predecessors, (1153), 0 states have call successors, (0), 0 states 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 22:52:42,088 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 22:52:42,088 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 22:52:42,109 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-17 22:52:42,306 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-12-17 22:52:42,307 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 22:52:42,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 22:52:42,307 INFO L85 PathProgramCache]: Analyzing trace with hash 760377528, now seen corresponding path program 9 times [2021-12-17 22:52:42,307 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 22:52:42,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882089716] [2021-12-17 22:52:42,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 22:52:42,308 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 22:52:42,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 22:52:42,433 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-17 22:52:42,439 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 22:52:42,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882089716] [2021-12-17 22:52:42,439 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882089716] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 22:52:42,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2016724575] [2021-12-17 22:52:42,439 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-17 22:52:42,440 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 22:52:42,440 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 22:52:42,456 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 22:52:42,489 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-17 22:52:42,676 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-17 22:52:42,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 22:52:42,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-17 22:52:42,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 22:52:42,879 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-17 22:52:42,880 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 22:52:42,993 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-17 22:52:42,994 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2016724575] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 22:52:42,994 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 22:52:42,994 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 21 [2021-12-17 22:52:42,994 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845038711] [2021-12-17 22:52:42,994 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 22:52:42,995 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-17 22:52:42,995 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 22:52:42,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-17 22:52:43,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-12-17 22:52:43,012 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 117 [2021-12-17 22:52:43,013 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 368 transitions, 3606 flow. Second operand has 21 states, 21 states have (on average 80.80952380952381) internal successors, (1697), 21 states have internal predecessors, (1697), 0 states have call successors, (0), 0 states 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 22:52:43,013 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 22:52:43,013 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 117 [2021-12-17 22:52:43,013 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 22:52:45,410 INFO L129 PetriNetUnfolder]: 2889/7215 cut-off events. [2021-12-17 22:52:45,410 INFO L130 PetriNetUnfolder]: For 27905/28586 co-relation queries the response was YES. [2021-12-17 22:52:45,439 INFO L84 FinitePrefix]: Finished finitePrefix Result has 28243 conditions, 7215 events. 2889/7215 cut-off events. For 27905/28586 co-relation queries the response was YES. Maximal size of possible extension queue 434. Compared 67007 event pairs, 159 based on Foata normal form. 336/7427 useless extension candidates. Maximal degree in co-relation 28192. Up to 1255 conditions per place. [2021-12-17 22:52:45,464 INFO L132 encePairwiseOnDemand]: 96/117 looper letters, 729 selfloop transitions, 367 changer transitions 0/1169 dead transitions. [2021-12-17 22:52:45,464 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 1169 transitions, 14505 flow [2021-12-17 22:52:45,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-12-17 22:52:45,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2021-12-17 22:52:45,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 3946 transitions. [2021-12-17 22:52:45,475 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7026353276353277 [2021-12-17 22:52:45,475 INFO L72 ComplementDD]: Start complementDD. Operand 48 states and 3946 transitions. [2021-12-17 22:52:45,475 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 3946 transitions. [2021-12-17 22:52:45,477 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 22:52:45,477 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 48 states and 3946 transitions. [2021-12-17 22:52:45,484 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 49 states, 48 states have (on average 82.20833333333333) internal successors, (3946), 48 states have internal predecessors, (3946), 0 states have call successors, (0), 0 states 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 22:52:45,491 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 49 states, 49 states have (on average 117.0) internal successors, (5733), 49 states have internal predecessors, (5733), 0 states have call successors, (0), 0 states 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 22:52:45,492 INFO L81 ComplementDD]: Finished complementDD. Result has 49 states, 49 states have (on average 117.0) internal successors, (5733), 49 states have internal predecessors, (5733), 0 states have call successors, (0), 0 states 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 22:52:45,492 INFO L186 Difference]: Start difference. First operand has 236 places, 368 transitions, 3606 flow. Second operand 48 states and 3946 transitions. [2021-12-17 22:52:45,492 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 1169 transitions, 14505 flow [2021-12-17 22:52:45,575 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 1169 transitions, 13905 flow, removed 236 selfloop flow, removed 16 redundant places. [2021-12-17 22:52:45,585 INFO L242 Difference]: Finished difference. Result has 286 places, 652 transitions, 7443 flow [2021-12-17 22:52:45,586 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=3428, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=368, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=262, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=7443, PETRI_PLACES=286, PETRI_TRANSITIONS=652} [2021-12-17 22:52:45,586 INFO L334 CegarLoopForPetriNet]: 104 programPoint places, 182 predicate places. [2021-12-17 22:52:45,586 INFO L470 AbstractCegarLoop]: Abstraction has has 286 places, 652 transitions, 7443 flow [2021-12-17 22:52:45,587 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 80.80952380952381) internal successors, (1697), 21 states have internal predecessors, (1697), 0 states have call successors, (0), 0 states 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 22:52:45,587 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 22:52:45,587 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 22:52:45,621 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-17 22:52:45,801 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-17 22:52:45,802 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 22:52:45,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 22:52:45,802 INFO L85 PathProgramCache]: Analyzing trace with hash 1350711022, now seen corresponding path program 10 times [2021-12-17 22:52:45,802 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 22:52:45,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525716950] [2021-12-17 22:52:45,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 22:52:45,802 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 22:52:45,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 22:52:45,901 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 22:52:45,902 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 22:52:45,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525716950] [2021-12-17 22:52:45,902 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525716950] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 22:52:45,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1095911207] [2021-12-17 22:52:45,902 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-17 22:52:45,902 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 22:52:45,903 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 22:52:45,903 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 22:52:45,904 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-17 22:52:45,963 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-17 22:52:45,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 22:52:45,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-17 22:52:45,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 22:52:46,170 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 22:52:46,170 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 22:52:46,409 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 22:52:46,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1095911207] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 22:52:46,409 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 22:52:46,409 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2021-12-17 22:52:46,409 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048261171] [2021-12-17 22:52:46,409 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 22:52:46,410 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-12-17 22:52:46,410 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 22:52:46,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-12-17 22:52:46,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=434, Unknown=0, NotChecked=0, Total=552 [2021-12-17 22:52:46,411 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 117 [2021-12-17 22:52:46,412 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 652 transitions, 7443 flow. Second operand has 24 states, 24 states have (on average 83.75) internal successors, (2010), 24 states have internal predecessors, (2010), 0 states have call successors, (0), 0 states 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 22:52:46,412 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 22:52:46,412 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 117 [2021-12-17 22:52:46,412 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 22:52:47,723 INFO L129 PetriNetUnfolder]: 2142/5899 cut-off events. [2021-12-17 22:52:47,723 INFO L130 PetriNetUnfolder]: For 36591/37273 co-relation queries the response was YES. [2021-12-17 22:52:47,755 INFO L84 FinitePrefix]: Finished finitePrefix Result has 28253 conditions, 5899 events. 2142/5899 cut-off events. For 36591/37273 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 57363 event pairs, 373 based on Foata normal form. 316/6009 useless extension candidates. Maximal degree in co-relation 28185. Up to 2546 conditions per place. [2021-12-17 22:52:47,769 INFO L132 encePairwiseOnDemand]: 101/117 looper letters, 380 selfloop transitions, 12 changer transitions 219/764 dead transitions. [2021-12-17 22:52:47,770 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 764 transitions, 9693 flow [2021-12-17 22:52:47,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-17 22:52:47,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2021-12-17 22:52:47,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1370 transitions. [2021-12-17 22:52:47,772 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7318376068376068 [2021-12-17 22:52:47,772 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1370 transitions. [2021-12-17 22:52:47,772 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1370 transitions. [2021-12-17 22:52:47,772 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 22:52:47,772 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1370 transitions. [2021-12-17 22:52:47,774 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 85.625) internal successors, (1370), 16 states have internal predecessors, (1370), 0 states have call successors, (0), 0 states 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 22:52:47,775 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 117.0) internal successors, (1989), 17 states have internal predecessors, (1989), 0 states have call successors, (0), 0 states 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 22:52:47,776 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 117.0) internal successors, (1989), 17 states have internal predecessors, (1989), 0 states have call successors, (0), 0 states 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 22:52:47,776 INFO L186 Difference]: Start difference. First operand has 286 places, 652 transitions, 7443 flow. Second operand 16 states and 1370 transitions. [2021-12-17 22:52:47,776 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 764 transitions, 9693 flow [2021-12-17 22:52:48,009 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 764 transitions, 9588 flow, removed 29 selfloop flow, removed 5 redundant places. [2021-12-17 22:52:48,017 INFO L242 Difference]: Finished difference. Result has 300 places, 514 transitions, 5560 flow [2021-12-17 22:52:48,017 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=7040, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=626, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=614, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=5560, PETRI_PLACES=300, PETRI_TRANSITIONS=514} [2021-12-17 22:52:48,018 INFO L334 CegarLoopForPetriNet]: 104 programPoint places, 196 predicate places. [2021-12-17 22:52:48,018 INFO L470 AbstractCegarLoop]: Abstraction has has 300 places, 514 transitions, 5560 flow [2021-12-17 22:52:48,018 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 83.75) internal successors, (2010), 24 states have internal predecessors, (2010), 0 states have call successors, (0), 0 states 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 22:52:48,019 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 22:52:48,019 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 22:52:48,035 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-12-17 22:52:48,225 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-12-17 22:52:48,225 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 22:52:48,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 22:52:48,225 INFO L85 PathProgramCache]: Analyzing trace with hash -438882637, now seen corresponding path program 11 times [2021-12-17 22:52:48,225 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 22:52:48,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616696965] [2021-12-17 22:52:48,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 22:52:48,226 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 22:52:48,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 22:52:48,333 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-17 22:52:48,333 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 22:52:48,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616696965] [2021-12-17 22:52:48,333 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616696965] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 22:52:48,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608413844] [2021-12-17 22:52:48,334 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-17 22:52:48,334 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 22:52:48,334 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 22:52:48,340 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 22:52:48,385 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-17 22:52:48,428 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-12-17 22:52:48,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 22:52:48,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-17 22:52:48,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 22:52:48,637 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-17 22:52:48,638 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 22:52:48,780 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-17 22:52:48,781 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1608413844] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 22:52:48,781 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 22:52:48,781 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 21 [2021-12-17 22:52:48,781 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491891440] [2021-12-17 22:52:48,781 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 22:52:48,781 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-17 22:52:48,781 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 22:52:48,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-17 22:52:48,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2021-12-17 22:52:48,782 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 117 [2021-12-17 22:52:48,783 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 514 transitions, 5560 flow. Second operand has 21 states, 21 states have (on average 80.71428571428571) internal successors, (1695), 21 states have internal predecessors, (1695), 0 states have call successors, (0), 0 states 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 22:52:48,783 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 22:52:48,783 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 117 [2021-12-17 22:52:48,783 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 22:52:49,937 INFO L129 PetriNetUnfolder]: 1700/3675 cut-off events. [2021-12-17 22:52:49,937 INFO L130 PetriNetUnfolder]: For 26580/26880 co-relation queries the response was YES. [2021-12-17 22:52:49,960 INFO L84 FinitePrefix]: Finished finitePrefix Result has 21270 conditions, 3675 events. 1700/3675 cut-off events. For 26580/26880 co-relation queries the response was YES. Maximal size of possible extension queue 232. Compared 27055 event pairs, 172 based on Foata normal form. 306/3856 useless extension candidates. Maximal degree in co-relation 21199. Up to 898 conditions per place. [2021-12-17 22:52:49,989 INFO L132 encePairwiseOnDemand]: 98/117 looper letters, 457 selfloop transitions, 254 changer transitions 0/784 dead transitions. [2021-12-17 22:52:49,989 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 784 transitions, 9821 flow [2021-12-17 22:52:49,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-12-17 22:52:49,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2021-12-17 22:52:49,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 2639 transitions. [2021-12-17 22:52:49,992 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7048611111111112 [2021-12-17 22:52:49,992 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 2639 transitions. [2021-12-17 22:52:49,992 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 2639 transitions. [2021-12-17 22:52:49,993 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 22:52:49,993 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 2639 transitions. [2021-12-17 22:52:49,995 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 82.46875) internal successors, (2639), 32 states have internal predecessors, (2639), 0 states have call successors, (0), 0 states 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 22:52:49,998 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 117.0) internal successors, (3861), 33 states have internal predecessors, (3861), 0 states have call successors, (0), 0 states 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 22:52:49,998 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 117.0) internal successors, (3861), 33 states have internal predecessors, (3861), 0 states have call successors, (0), 0 states 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 22:52:49,999 INFO L186 Difference]: Start difference. First operand has 300 places, 514 transitions, 5560 flow. Second operand 32 states and 2639 transitions. [2021-12-17 22:52:49,999 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 784 transitions, 9821 flow [2021-12-17 22:52:50,085 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 784 transitions, 9322 flow, removed 86 selfloop flow, removed 21 redundant places. [2021-12-17 22:52:50,093 INFO L242 Difference]: Finished difference. Result has 305 places, 595 transitions, 6944 flow [2021-12-17 22:52:50,093 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=5010, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=496, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=161, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=320, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=6944, PETRI_PLACES=305, PETRI_TRANSITIONS=595} [2021-12-17 22:52:50,094 INFO L334 CegarLoopForPetriNet]: 104 programPoint places, 201 predicate places. [2021-12-17 22:52:50,094 INFO L470 AbstractCegarLoop]: Abstraction has has 305 places, 595 transitions, 6944 flow [2021-12-17 22:52:50,094 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 80.71428571428571) internal successors, (1695), 21 states have internal predecessors, (1695), 0 states have call successors, (0), 0 states 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 22:52:50,094 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 22:52:50,095 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 22:52:50,113 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-12-17 22:52:50,308 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-12-17 22:52:50,308 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 22:52:50,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 22:52:50,308 INFO L85 PathProgramCache]: Analyzing trace with hash 1565463753, now seen corresponding path program 12 times [2021-12-17 22:52:50,309 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 22:52:50,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113471140] [2021-12-17 22:52:50,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 22:52:50,309 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 22:52:50,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 22:52:50,424 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 22:52:50,424 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 22:52:50,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113471140] [2021-12-17 22:52:50,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113471140] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 22:52:50,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40563456] [2021-12-17 22:52:50,425 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-17 22:52:50,425 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 22:52:50,425 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 22:52:50,426 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 22:52:50,427 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-17 22:52:50,509 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-12-17 22:52:50,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 22:52:50,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-17 22:52:50,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 22:52:50,715 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 22:52:50,728 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 22:52:51,009 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 22:52:51,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [40563456] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 22:52:51,009 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 22:52:51,009 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2021-12-17 22:52:51,009 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548245451] [2021-12-17 22:52:51,009 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 22:52:51,010 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-12-17 22:52:51,010 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 22:52:51,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-12-17 22:52:51,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=435, Unknown=0, NotChecked=0, Total=552 [2021-12-17 22:52:51,012 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 117 [2021-12-17 22:52:51,013 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 595 transitions, 6944 flow. Second operand has 24 states, 24 states have (on average 84.08333333333333) internal successors, (2018), 24 states have internal predecessors, (2018), 0 states have call successors, (0), 0 states 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 22:52:51,013 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 22:52:51,013 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 117 [2021-12-17 22:52:51,013 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 22:52:51,974 INFO L129 PetriNetUnfolder]: 1666/3545 cut-off events. [2021-12-17 22:52:51,974 INFO L130 PetriNetUnfolder]: For 34150/34329 co-relation queries the response was YES. [2021-12-17 22:52:52,002 INFO L84 FinitePrefix]: Finished finitePrefix Result has 21499 conditions, 3545 events. 1666/3545 cut-off events. For 34150/34329 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 24498 event pairs, 183 based on Foata normal form. 153/3584 useless extension candidates. Maximal degree in co-relation 21430. Up to 1009 conditions per place. [2021-12-17 22:52:52,018 INFO L132 encePairwiseOnDemand]: 104/117 looper letters, 312 selfloop transitions, 192 changer transitions 0/707 dead transitions. [2021-12-17 22:52:52,018 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 707 transitions, 9041 flow [2021-12-17 22:52:52,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-17 22:52:52,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2021-12-17 22:52:52,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1280 transitions. [2021-12-17 22:52:52,020 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7293447293447294 [2021-12-17 22:52:52,020 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1280 transitions. [2021-12-17 22:52:52,021 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1280 transitions. [2021-12-17 22:52:52,021 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 22:52:52,021 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1280 transitions. [2021-12-17 22:52:52,022 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 85.33333333333333) internal successors, (1280), 15 states have internal predecessors, (1280), 0 states have call successors, (0), 0 states 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 22:52:52,024 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 117.0) internal successors, (1872), 16 states have internal predecessors, (1872), 0 states have call successors, (0), 0 states 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 22:52:52,024 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 117.0) internal successors, (1872), 16 states have internal predecessors, (1872), 0 states have call successors, (0), 0 states 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 22:52:52,024 INFO L186 Difference]: Start difference. First operand has 305 places, 595 transitions, 6944 flow. Second operand 15 states and 1280 transitions. [2021-12-17 22:52:52,024 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 707 transitions, 9041 flow [2021-12-17 22:52:52,244 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 707 transitions, 8434 flow, removed 154 selfloop flow, removed 17 redundant places. [2021-12-17 22:52:52,252 INFO L242 Difference]: Finished difference. Result has 306 places, 622 transitions, 7427 flow [2021-12-17 22:52:52,253 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=6432, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=592, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=162, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=411, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=7427, PETRI_PLACES=306, PETRI_TRANSITIONS=622} [2021-12-17 22:52:52,253 INFO L334 CegarLoopForPetriNet]: 104 programPoint places, 202 predicate places. [2021-12-17 22:52:52,253 INFO L470 AbstractCegarLoop]: Abstraction has has 306 places, 622 transitions, 7427 flow [2021-12-17 22:52:52,254 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 84.08333333333333) internal successors, (2018), 24 states have internal predecessors, (2018), 0 states have call successors, (0), 0 states 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 22:52:52,254 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 22:52:52,254 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 22:52:52,271 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2021-12-17 22:52:52,467 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 22:52:52,467 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 22:52:52,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 22:52:52,468 INFO L85 PathProgramCache]: Analyzing trace with hash -920988055, now seen corresponding path program 13 times [2021-12-17 22:52:52,468 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 22:52:52,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177137907] [2021-12-17 22:52:52,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 22:52:52,468 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 22:52:52,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 22:52:52,800 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-17 22:52:52,800 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 22:52:52,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177137907] [2021-12-17 22:52:52,800 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177137907] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 22:52:52,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280276196] [2021-12-17 22:52:52,800 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-17 22:52:52,801 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 22:52:52,801 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 22:52:52,801 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 22:52:52,802 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-17 22:52:52,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 22:52:52,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 83 conjunts are in the unsatisfiable core [2021-12-17 22:52:52,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 22:52:53,330 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-17 22:52:53,331 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 22:52:53,570 INFO L354 Elim1Store]: treesize reduction 39, result has 52.4 percent of original size [2021-12-17 22:52:53,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 51 [2021-12-17 22:52:53,740 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-17 22:52:53,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1280276196] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 22:52:53,740 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 22:52:53,740 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21, 14] total 32 [2021-12-17 22:52:53,740 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420922268] [2021-12-17 22:52:53,740 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 22:52:53,741 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-12-17 22:52:53,741 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 22:52:53,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-12-17 22:52:53,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=904, Unknown=0, NotChecked=0, Total=992 [2021-12-17 22:52:53,742 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 117 [2021-12-17 22:52:53,743 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 622 transitions, 7427 flow. Second operand has 32 states, 32 states have (on average 55.53125) internal successors, (1777), 32 states have internal predecessors, (1777), 0 states have call successors, (0), 0 states 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 22:52:53,743 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 22:52:53,743 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 117 [2021-12-17 22:52:53,743 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 22:52:55,786 INFO L129 PetriNetUnfolder]: 3864/6773 cut-off events. [2021-12-17 22:52:55,787 INFO L130 PetriNetUnfolder]: For 52360/52414 co-relation queries the response was YES. [2021-12-17 22:52:55,824 INFO L84 FinitePrefix]: Finished finitePrefix Result has 40591 conditions, 6773 events. 3864/6773 cut-off events. For 52360/52414 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 49521 event pairs, 316 based on Foata normal form. 28/6781 useless extension candidates. Maximal degree in co-relation 40528. Up to 3899 conditions per place. [2021-12-17 22:52:55,848 INFO L132 encePairwiseOnDemand]: 91/117 looper letters, 624 selfloop transitions, 279 changer transitions 4/949 dead transitions. [2021-12-17 22:52:55,848 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 949 transitions, 12652 flow [2021-12-17 22:52:55,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-12-17 22:52:55,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2021-12-17 22:52:55,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 1992 transitions. [2021-12-17 22:52:55,852 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5007541478129713 [2021-12-17 22:52:55,852 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 1992 transitions. [2021-12-17 22:52:55,852 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 1992 transitions. [2021-12-17 22:52:55,852 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 22:52:55,852 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 1992 transitions. [2021-12-17 22:52:55,854 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 58.588235294117645) internal successors, (1992), 34 states have internal predecessors, (1992), 0 states have call successors, (0), 0 states 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 22:52:55,857 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 117.0) internal successors, (4095), 35 states have internal predecessors, (4095), 0 states have call successors, (0), 0 states 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 22:52:55,857 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 117.0) internal successors, (4095), 35 states have internal predecessors, (4095), 0 states have call successors, (0), 0 states 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 22:52:55,857 INFO L186 Difference]: Start difference. First operand has 306 places, 622 transitions, 7427 flow. Second operand 34 states and 1992 transitions. [2021-12-17 22:52:55,857 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 949 transitions, 12652 flow [2021-12-17 22:52:56,115 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 949 transitions, 12528 flow, removed 36 selfloop flow, removed 12 redundant places. [2021-12-17 22:52:56,126 INFO L242 Difference]: Finished difference. Result has 345 places, 749 transitions, 10054 flow [2021-12-17 22:52:56,126 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=7354, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=622, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=160, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=395, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=10054, PETRI_PLACES=345, PETRI_TRANSITIONS=749} [2021-12-17 22:52:56,127 INFO L334 CegarLoopForPetriNet]: 104 programPoint places, 241 predicate places. [2021-12-17 22:52:56,127 INFO L470 AbstractCegarLoop]: Abstraction has has 345 places, 749 transitions, 10054 flow [2021-12-17 22:52:56,127 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 55.53125) internal successors, (1777), 32 states have internal predecessors, (1777), 0 states have call successors, (0), 0 states 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 22:52:56,127 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 22:52:56,128 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 22:52:56,144 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-12-17 22:52:56,334 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 22:52:56,334 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 22:52:56,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 22:52:56,335 INFO L85 PathProgramCache]: Analyzing trace with hash -2085642153, now seen corresponding path program 14 times [2021-12-17 22:52:56,335 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 22:52:56,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70951362] [2021-12-17 22:52:56,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 22:52:56,335 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 22:52:56,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 22:52:57,004 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 22:52:57,004 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 22:52:57,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70951362] [2021-12-17 22:52:57,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70951362] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 22:52:57,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479322294] [2021-12-17 22:52:57,004 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 22:52:57,004 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 22:52:57,004 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 22:52:57,020 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 22:52:57,080 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-17 22:52:57,137 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 22:52:57,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 22:52:57,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 77 conjunts are in the unsatisfiable core [2021-12-17 22:52:57,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 22:52:57,766 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-17 22:52:57,768 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-17 22:52:57,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 14 [2021-12-17 22:52:57,805 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-17 22:52:57,805 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 22:52:58,092 INFO L354 Elim1Store]: treesize reduction 39, result has 52.4 percent of original size [2021-12-17 22:52:58,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 51 [2021-12-17 22:52:58,380 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-17 22:52:58,380 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [479322294] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 22:52:58,380 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 22:52:58,380 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 19, 15] total 50 [2021-12-17 22:52:58,380 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774779408] [2021-12-17 22:52:58,380 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 22:52:58,380 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-12-17 22:52:58,381 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 22:52:58,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-12-17 22:52:58,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=2275, Unknown=0, NotChecked=0, Total=2450 [2021-12-17 22:52:58,382 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 117 [2021-12-17 22:52:58,384 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 345 places, 749 transitions, 10054 flow. Second operand has 50 states, 50 states have (on average 51.08) internal successors, (2554), 50 states have internal predecessors, (2554), 0 states have call successors, (0), 0 states 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 22:52:58,384 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 22:52:58,384 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 117 [2021-12-17 22:52:58,384 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 22:53:02,561 INFO L129 PetriNetUnfolder]: 5622/9937 cut-off events. [2021-12-17 22:53:02,563 INFO L130 PetriNetUnfolder]: For 87543/87620 co-relation queries the response was YES. [2021-12-17 22:53:02,631 INFO L84 FinitePrefix]: Finished finitePrefix Result has 63003 conditions, 9937 events. 5622/9937 cut-off events. For 87543/87620 co-relation queries the response was YES. Maximal size of possible extension queue 686. Compared 77992 event pairs, 478 based on Foata normal form. 39/9940 useless extension candidates. Maximal degree in co-relation 62927. Up to 4836 conditions per place. [2021-12-17 22:53:02,670 INFO L132 encePairwiseOnDemand]: 83/117 looper letters, 859 selfloop transitions, 533 changer transitions 8/1438 dead transitions. [2021-12-17 22:53:02,670 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 409 places, 1438 transitions, 21296 flow [2021-12-17 22:53:02,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-12-17 22:53:02,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2021-12-17 22:53:02,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 3586 transitions. [2021-12-17 22:53:02,689 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.4574563082025769 [2021-12-17 22:53:02,689 INFO L72 ComplementDD]: Start complementDD. Operand 67 states and 3586 transitions. [2021-12-17 22:53:02,690 INFO L73 IsDeterministic]: Start isDeterministic. Operand 67 states and 3586 transitions. [2021-12-17 22:53:02,692 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 22:53:02,692 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 67 states and 3586 transitions. [2021-12-17 22:53:02,697 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 68 states, 67 states have (on average 53.52238805970149) internal successors, (3586), 67 states have internal predecessors, (3586), 0 states have call successors, (0), 0 states 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 22:53:02,704 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 68 states, 68 states have (on average 117.0) internal successors, (7956), 68 states have internal predecessors, (7956), 0 states have call successors, (0), 0 states 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 22:53:02,706 INFO L81 ComplementDD]: Finished complementDD. Result has 68 states, 68 states have (on average 117.0) internal successors, (7956), 68 states have internal predecessors, (7956), 0 states have call successors, (0), 0 states 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 22:53:02,706 INFO L186 Difference]: Start difference. First operand has 345 places, 749 transitions, 10054 flow. Second operand 67 states and 3586 transitions. [2021-12-17 22:53:02,706 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 409 places, 1438 transitions, 21296 flow [2021-12-17 22:53:03,455 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 395 places, 1438 transitions, 21045 flow, removed 93 selfloop flow, removed 14 redundant places. [2021-12-17 22:53:03,472 INFO L242 Difference]: Finished difference. Result has 416 places, 1038 transitions, 15570 flow [2021-12-17 22:53:03,473 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=9892, PETRI_DIFFERENCE_MINUEND_PLACES=329, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=749, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=256, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=458, PETRI_DIFFERENCE_SUBTRAHEND_STATES=67, PETRI_FLOW=15570, PETRI_PLACES=416, PETRI_TRANSITIONS=1038} [2021-12-17 22:53:03,473 INFO L334 CegarLoopForPetriNet]: 104 programPoint places, 312 predicate places. [2021-12-17 22:53:03,473 INFO L470 AbstractCegarLoop]: Abstraction has has 416 places, 1038 transitions, 15570 flow [2021-12-17 22:53:03,474 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 51.08) internal successors, (2554), 50 states have internal predecessors, (2554), 0 states have call successors, (0), 0 states 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 22:53:03,474 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 22:53:03,474 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 22:53:03,490 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2021-12-17 22:53:03,687 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 22:53:03,687 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 22:53:03,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 22:53:03,688 INFO L85 PathProgramCache]: Analyzing trace with hash -2007384311, now seen corresponding path program 15 times [2021-12-17 22:53:03,688 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 22:53:03,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922624323] [2021-12-17 22:53:03,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 22:53:03,688 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 22:53:03,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 22:53:04,240 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 22:53:04,240 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 22:53:04,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922624323] [2021-12-17 22:53:04,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922624323] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 22:53:04,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702051215] [2021-12-17 22:53:04,241 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-17 22:53:04,241 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 22:53:04,241 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 22:53:04,242 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 22:53:04,243 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-12-17 22:53:04,332 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-17 22:53:04,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 22:53:04,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 83 conjunts are in the unsatisfiable core [2021-12-17 22:53:04,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 22:53:04,865 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-17 22:53:04,865 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 22:53:05,153 INFO L354 Elim1Store]: treesize reduction 39, result has 52.4 percent of original size [2021-12-17 22:53:05,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 51 [2021-12-17 22:53:05,410 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-17 22:53:05,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1702051215] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 22:53:05,410 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 22:53:05,410 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 21, 15] total 50 [2021-12-17 22:53:05,410 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976292734] [2021-12-17 22:53:05,410 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 22:53:05,411 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-12-17 22:53:05,411 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 22:53:05,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-12-17 22:53:05,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=2269, Unknown=0, NotChecked=0, Total=2450 [2021-12-17 22:53:05,415 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 117 [2021-12-17 22:53:05,417 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 416 places, 1038 transitions, 15570 flow. Second operand has 50 states, 50 states have (on average 51.12) internal successors, (2556), 50 states have internal predecessors, (2556), 0 states have call successors, (0), 0 states 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 22:53:05,417 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 22:53:05,417 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 117 [2021-12-17 22:53:05,417 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 22:53:09,940 INFO L129 PetriNetUnfolder]: 6145/10893 cut-off events. [2021-12-17 22:53:09,941 INFO L130 PetriNetUnfolder]: For 154250/154341 co-relation queries the response was YES. [2021-12-17 22:53:10,313 INFO L84 FinitePrefix]: Finished finitePrefix Result has 80748 conditions, 10893 events. 6145/10893 cut-off events. For 154250/154341 co-relation queries the response was YES. Maximal size of possible extension queue 735. Compared 86717 event pairs, 557 based on Foata normal form. 38/10887 useless extension candidates. Maximal degree in co-relation 80652. Up to 5954 conditions per place. [2021-12-17 22:53:10,370 INFO L132 encePairwiseOnDemand]: 88/117 looper letters, 878 selfloop transitions, 539 changer transitions 4/1459 dead transitions. [2021-12-17 22:53:10,370 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 472 places, 1459 transitions, 23987 flow [2021-12-17 22:53:10,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-12-17 22:53:10,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2021-12-17 22:53:10,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 3245 transitions. [2021-12-17 22:53:10,373 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.45467283172201206 [2021-12-17 22:53:10,373 INFO L72 ComplementDD]: Start complementDD. Operand 61 states and 3245 transitions. [2021-12-17 22:53:10,373 INFO L73 IsDeterministic]: Start isDeterministic. Operand 61 states and 3245 transitions. [2021-12-17 22:53:10,374 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 22:53:10,374 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 61 states and 3245 transitions. [2021-12-17 22:53:10,377 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 62 states, 61 states have (on average 53.19672131147541) internal successors, (3245), 61 states have internal predecessors, (3245), 0 states have call successors, (0), 0 states 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 22:53:10,384 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 62 states, 62 states have (on average 117.0) internal successors, (7254), 62 states have internal predecessors, (7254), 0 states have call successors, (0), 0 states 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 22:53:10,384 INFO L81 ComplementDD]: Finished complementDD. Result has 62 states, 62 states have (on average 117.0) internal successors, (7254), 62 states have internal predecessors, (7254), 0 states have call successors, (0), 0 states 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 22:53:10,385 INFO L186 Difference]: Start difference. First operand has 416 places, 1038 transitions, 15570 flow. Second operand 61 states and 3245 transitions. [2021-12-17 22:53:10,385 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 472 places, 1459 transitions, 23987 flow [2021-12-17 22:53:11,687 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 449 places, 1459 transitions, 22993 flow, removed 230 selfloop flow, removed 23 redundant places. [2021-12-17 22:53:11,708 INFO L242 Difference]: Finished difference. Result has 462 places, 1134 transitions, 17661 flow [2021-12-17 22:53:11,709 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=14580, PETRI_DIFFERENCE_MINUEND_PLACES=389, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1038, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=454, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=557, PETRI_DIFFERENCE_SUBTRAHEND_STATES=61, PETRI_FLOW=17661, PETRI_PLACES=462, PETRI_TRANSITIONS=1134} [2021-12-17 22:53:11,709 INFO L334 CegarLoopForPetriNet]: 104 programPoint places, 358 predicate places. [2021-12-17 22:53:11,710 INFO L470 AbstractCegarLoop]: Abstraction has has 462 places, 1134 transitions, 17661 flow [2021-12-17 22:53:11,710 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 51.12) internal successors, (2556), 50 states have internal predecessors, (2556), 0 states have call successors, (0), 0 states 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 22:53:11,710 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 22:53:11,710 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 22:53:11,729 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-12-17 22:53:11,921 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 22:53:11,921 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 22:53:11,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 22:53:11,922 INFO L85 PathProgramCache]: Analyzing trace with hash 1154698957, now seen corresponding path program 16 times [2021-12-17 22:53:11,922 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 22:53:11,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631614030] [2021-12-17 22:53:11,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 22:53:11,922 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 22:53:11,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 22:53:12,585 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 22:53:12,586 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 22:53:12,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631614030] [2021-12-17 22:53:12,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631614030] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 22:53:12,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704466266] [2021-12-17 22:53:12,586 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-17 22:53:12,586 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 22:53:12,587 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 22:53:12,588 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 22:53:12,589 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-12-17 22:53:12,680 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-17 22:53:12,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 22:53:12,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 83 conjunts are in the unsatisfiable core [2021-12-17 22:53:12,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 22:53:13,324 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-17 22:53:13,326 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-17 22:53:13,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 14 [2021-12-17 22:53:13,373 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-17 22:53:13,373 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 22:53:13,690 INFO L354 Elim1Store]: treesize reduction 39, result has 52.4 percent of original size [2021-12-17 22:53:13,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 51 [2021-12-17 22:53:13,876 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-17 22:53:13,876 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1704466266] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 22:53:13,877 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 22:53:13,877 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 21, 14] total 48 [2021-12-17 22:53:13,877 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464656769] [2021-12-17 22:53:13,877 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 22:53:13,877 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-12-17 22:53:13,877 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 22:53:13,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-12-17 22:53:13,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=2084, Unknown=0, NotChecked=0, Total=2256 [2021-12-17 22:53:13,879 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 117 [2021-12-17 22:53:13,880 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 462 places, 1134 transitions, 17661 flow. Second operand has 48 states, 48 states have (on average 51.229166666666664) internal successors, (2459), 48 states have internal predecessors, (2459), 0 states have call successors, (0), 0 states 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 22:53:13,880 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 22:53:13,880 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 117 [2021-12-17 22:53:13,880 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 22:53:19,767 INFO L129 PetriNetUnfolder]: 6827/12148 cut-off events. [2021-12-17 22:53:19,767 INFO L130 PetriNetUnfolder]: For 181521/181612 co-relation queries the response was YES. [2021-12-17 22:53:19,980 INFO L84 FinitePrefix]: Finished finitePrefix Result has 91867 conditions, 12148 events. 6827/12148 cut-off events. For 181521/181612 co-relation queries the response was YES. Maximal size of possible extension queue 796. Compared 98460 event pairs, 597 based on Foata normal form. 43/12141 useless extension candidates. Maximal degree in co-relation 91761. Up to 6396 conditions per place. [2021-12-17 22:53:20,056 INFO L132 encePairwiseOnDemand]: 88/117 looper letters, 871 selfloop transitions, 612 changer transitions 8/1529 dead transitions. [2021-12-17 22:53:20,056 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 524 places, 1529 transitions, 25607 flow [2021-12-17 22:53:20,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-12-17 22:53:20,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2021-12-17 22:53:20,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 3463 transitions. [2021-12-17 22:53:20,072 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.4553583168967784 [2021-12-17 22:53:20,072 INFO L72 ComplementDD]: Start complementDD. Operand 65 states and 3463 transitions. [2021-12-17 22:53:20,072 INFO L73 IsDeterministic]: Start isDeterministic. Operand 65 states and 3463 transitions. [2021-12-17 22:53:20,073 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 22:53:20,083 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 65 states and 3463 transitions. [2021-12-17 22:53:20,103 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 66 states, 65 states have (on average 53.276923076923076) internal successors, (3463), 65 states have internal predecessors, (3463), 0 states have call successors, (0), 0 states 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 22:53:20,118 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 66 states, 66 states have (on average 117.0) internal successors, (7722), 66 states have internal predecessors, (7722), 0 states have call successors, (0), 0 states 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 22:53:20,133 INFO L81 ComplementDD]: Finished complementDD. Result has 66 states, 66 states have (on average 117.0) internal successors, (7722), 66 states have internal predecessors, (7722), 0 states have call successors, (0), 0 states 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 22:53:20,133 INFO L186 Difference]: Start difference. First operand has 462 places, 1134 transitions, 17661 flow. Second operand 65 states and 3463 transitions. [2021-12-17 22:53:20,138 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 524 places, 1529 transitions, 25607 flow [2021-12-17 22:53:21,523 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 483 places, 1529 transitions, 24741 flow, removed 173 selfloop flow, removed 41 redundant places. [2021-12-17 22:53:21,544 INFO L242 Difference]: Finished difference. Result has 492 places, 1213 transitions, 19617 flow [2021-12-17 22:53:21,545 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=16817, PETRI_DIFFERENCE_MINUEND_PLACES=419, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=547, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=580, PETRI_DIFFERENCE_SUBTRAHEND_STATES=65, PETRI_FLOW=19617, PETRI_PLACES=492, PETRI_TRANSITIONS=1213} [2021-12-17 22:53:21,545 INFO L334 CegarLoopForPetriNet]: 104 programPoint places, 388 predicate places. [2021-12-17 22:53:21,546 INFO L470 AbstractCegarLoop]: Abstraction has has 492 places, 1213 transitions, 19617 flow [2021-12-17 22:53:21,546 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 51.229166666666664) internal successors, (2459), 48 states have internal predecessors, (2459), 0 states have call successors, (0), 0 states 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 22:53:21,546 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 22:53:21,547 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 22:53:21,565 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-12-17 22:53:21,763 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 22:53:21,763 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 22:53:21,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 22:53:21,764 INFO L85 PathProgramCache]: Analyzing trace with hash -232065619, now seen corresponding path program 17 times [2021-12-17 22:53:21,764 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 22:53:21,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175746161] [2021-12-17 22:53:21,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 22:53:21,764 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 22:53:21,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 22:53:22,601 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 22:53:22,602 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 22:53:22,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175746161] [2021-12-17 22:53:22,602 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175746161] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 22:53:22,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1233693763] [2021-12-17 22:53:22,603 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-17 22:53:22,603 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 22:53:22,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 22:53:22,604 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 22:53:22,631 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-12-17 22:53:22,718 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-12-17 22:53:22,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 22:53:22,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 67 conjunts are in the unsatisfiable core [2021-12-17 22:53:22,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 22:53:23,207 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-17 22:53:23,208 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 22:53:23,488 INFO L354 Elim1Store]: treesize reduction 39, result has 52.4 percent of original size [2021-12-17 22:53:23,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 51 [2021-12-17 22:53:23,670 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-17 22:53:23,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1233693763] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 22:53:23,670 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 22:53:23,670 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 14, 14] total 45 [2021-12-17 22:53:23,670 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963585135] [2021-12-17 22:53:23,671 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 22:53:23,671 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-12-17 22:53:23,671 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 22:53:23,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-12-17 22:53:23,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=1829, Unknown=0, NotChecked=0, Total=1980 [2021-12-17 22:53:23,672 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 117 [2021-12-17 22:53:23,674 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 492 places, 1213 transitions, 19617 flow. Second operand has 45 states, 45 states have (on average 51.0) internal successors, (2295), 45 states have internal predecessors, (2295), 0 states have call successors, (0), 0 states 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 22:53:23,674 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 22:53:23,674 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 117 [2021-12-17 22:53:23,674 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 22:53:30,495 INFO L129 PetriNetUnfolder]: 7674/13629 cut-off events. [2021-12-17 22:53:30,495 INFO L130 PetriNetUnfolder]: For 217863/217957 co-relation queries the response was YES. [2021-12-17 22:53:30,617 INFO L84 FinitePrefix]: Finished finitePrefix Result has 106290 conditions, 13629 events. 7674/13629 cut-off events. For 217863/217957 co-relation queries the response was YES. Maximal size of possible extension queue 839. Compared 112547 event pairs, 1002 based on Foata normal form. 38/13604 useless extension candidates. Maximal degree in co-relation 106176. Up to 9329 conditions per place. [2021-12-17 22:53:30,676 INFO L132 encePairwiseOnDemand]: 88/117 looper letters, 993 selfloop transitions, 520 changer transitions 4/1555 dead transitions. [2021-12-17 22:53:30,676 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 540 places, 1555 transitions, 27505 flow [2021-12-17 22:53:30,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-12-17 22:53:30,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2021-12-17 22:53:30,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 2847 transitions. [2021-12-17 22:53:30,679 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.4591194968553459 [2021-12-17 22:53:30,679 INFO L72 ComplementDD]: Start complementDD. Operand 53 states and 2847 transitions. [2021-12-17 22:53:30,679 INFO L73 IsDeterministic]: Start isDeterministic. Operand 53 states and 2847 transitions. [2021-12-17 22:53:30,680 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 22:53:30,680 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 53 states and 2847 transitions. [2021-12-17 22:53:30,689 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 54 states, 53 states have (on average 53.716981132075475) internal successors, (2847), 53 states have internal predecessors, (2847), 0 states have call successors, (0), 0 states 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 22:53:30,705 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 54 states, 54 states have (on average 117.0) internal successors, (6318), 54 states have internal predecessors, (6318), 0 states have call successors, (0), 0 states 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 22:53:30,706 INFO L81 ComplementDD]: Finished complementDD. Result has 54 states, 54 states have (on average 117.0) internal successors, (6318), 54 states have internal predecessors, (6318), 0 states have call successors, (0), 0 states 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 22:53:30,706 INFO L186 Difference]: Start difference. First operand has 492 places, 1213 transitions, 19617 flow. Second operand 53 states and 2847 transitions. [2021-12-17 22:53:30,706 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 540 places, 1555 transitions, 27505 flow [2021-12-17 22:53:32,374 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 498 places, 1555 transitions, 26818 flow, removed 87 selfloop flow, removed 42 redundant places. [2021-12-17 22:53:32,445 INFO L242 Difference]: Finished difference. Result has 503 places, 1331 transitions, 22735 flow [2021-12-17 22:53:32,446 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=19056, PETRI_DIFFERENCE_MINUEND_PLACES=446, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=404, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=801, PETRI_DIFFERENCE_SUBTRAHEND_STATES=53, PETRI_FLOW=22735, PETRI_PLACES=503, PETRI_TRANSITIONS=1331} [2021-12-17 22:53:32,446 INFO L334 CegarLoopForPetriNet]: 104 programPoint places, 399 predicate places. [2021-12-17 22:53:32,446 INFO L470 AbstractCegarLoop]: Abstraction has has 503 places, 1331 transitions, 22735 flow [2021-12-17 22:53:32,446 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 51.0) internal successors, (2295), 45 states have internal predecessors, (2295), 0 states have call successors, (0), 0 states 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 22:53:32,446 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 22:53:32,447 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 22:53:32,465 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-12-17 22:53:32,649 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 22:53:32,649 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 22:53:32,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 22:53:32,649 INFO L85 PathProgramCache]: Analyzing trace with hash 1309195947, now seen corresponding path program 18 times [2021-12-17 22:53:32,649 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 22:53:32,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538344269] [2021-12-17 22:53:32,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 22:53:32,649 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 22:53:32,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 22:53:33,259 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 22:53:33,259 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 22:53:33,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538344269] [2021-12-17 22:53:33,259 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538344269] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 22:53:33,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265874631] [2021-12-17 22:53:33,260 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-17 22:53:33,260 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 22:53:33,260 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 22:53:33,261 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 22:53:33,262 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-12-17 22:53:33,385 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-12-17 22:53:33,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 22:53:33,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 79 conjunts are in the unsatisfiable core [2021-12-17 22:53:33,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 22:53:33,886 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-17 22:53:33,886 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 22:53:34,223 INFO L354 Elim1Store]: treesize reduction 39, result has 52.4 percent of original size [2021-12-17 22:53:34,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 51 [2021-12-17 22:53:34,458 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-17 22:53:34,459 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [265874631] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 22:53:34,459 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 22:53:34,459 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 16, 14] total 47 [2021-12-17 22:53:34,459 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347251013] [2021-12-17 22:53:34,459 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 22:53:34,460 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-12-17 22:53:34,460 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 22:53:34,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-12-17 22:53:34,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=2005, Unknown=0, NotChecked=0, Total=2162 [2021-12-17 22:53:34,462 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 117 [2021-12-17 22:53:34,463 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 503 places, 1331 transitions, 22735 flow. Second operand has 47 states, 47 states have (on average 50.97872340425532) internal successors, (2396), 47 states have internal predecessors, (2396), 0 states have call successors, (0), 0 states 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 22:53:34,463 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 22:53:34,463 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 117 [2021-12-17 22:53:34,471 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 22:53:41,498 INFO L129 PetriNetUnfolder]: 8107/14424 cut-off events. [2021-12-17 22:53:41,498 INFO L130 PetriNetUnfolder]: For 240161/240252 co-relation queries the response was YES. [2021-12-17 22:53:41,652 INFO L84 FinitePrefix]: Finished finitePrefix Result has 114287 conditions, 14424 events. 8107/14424 cut-off events. For 240161/240252 co-relation queries the response was YES. Maximal size of possible extension queue 865. Compared 120339 event pairs, 866 based on Foata normal form. 38/14402 useless extension candidates. Maximal degree in co-relation 114171. Up to 8245 conditions per place. [2021-12-17 22:53:41,725 INFO L132 encePairwiseOnDemand]: 88/117 looper letters, 1022 selfloop transitions, 664 changer transitions 4/1728 dead transitions. [2021-12-17 22:53:41,726 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 558 places, 1728 transitions, 31235 flow [2021-12-17 22:53:41,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-12-17 22:53:41,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2021-12-17 22:53:41,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 3126 transitions. [2021-12-17 22:53:41,738 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.46065428824049515 [2021-12-17 22:53:41,738 INFO L72 ComplementDD]: Start complementDD. Operand 58 states and 3126 transitions. [2021-12-17 22:53:41,738 INFO L73 IsDeterministic]: Start isDeterministic. Operand 58 states and 3126 transitions. [2021-12-17 22:53:41,738 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 22:53:41,738 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 58 states and 3126 transitions. [2021-12-17 22:53:41,757 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 59 states, 58 states have (on average 53.89655172413793) internal successors, (3126), 58 states have internal predecessors, (3126), 0 states have call successors, (0), 0 states 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 22:53:41,760 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 59 states, 59 states have (on average 117.0) internal successors, (6903), 59 states have internal predecessors, (6903), 0 states have call successors, (0), 0 states 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 22:53:41,776 INFO L81 ComplementDD]: Finished complementDD. Result has 59 states, 59 states have (on average 117.0) internal successors, (6903), 59 states have internal predecessors, (6903), 0 states have call successors, (0), 0 states 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 22:53:41,776 INFO L186 Difference]: Start difference. First operand has 503 places, 1331 transitions, 22735 flow. Second operand 58 states and 3126 transitions. [2021-12-17 22:53:41,776 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 558 places, 1728 transitions, 31235 flow [2021-12-17 22:53:44,104 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 518 places, 1728 transitions, 30544 flow, removed 49 selfloop flow, removed 40 redundant places. [2021-12-17 22:53:44,152 INFO L242 Difference]: Finished difference. Result has 528 places, 1383 transitions, 24736 flow [2021-12-17 22:53:44,153 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=22046, PETRI_DIFFERENCE_MINUEND_PLACES=461, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1331, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=623, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=687, PETRI_DIFFERENCE_SUBTRAHEND_STATES=58, PETRI_FLOW=24736, PETRI_PLACES=528, PETRI_TRANSITIONS=1383} [2021-12-17 22:53:44,154 INFO L334 CegarLoopForPetriNet]: 104 programPoint places, 424 predicate places. [2021-12-17 22:53:44,154 INFO L470 AbstractCegarLoop]: Abstraction has has 528 places, 1383 transitions, 24736 flow [2021-12-17 22:53:44,155 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 50.97872340425532) internal successors, (2396), 47 states have internal predecessors, (2396), 0 states have call successors, (0), 0 states 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 22:53:44,171 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 22:53:44,171 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 22:53:44,188 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-12-17 22:53:44,388 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-12-17 22:53:44,388 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 22:53:44,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 22:53:44,389 INFO L85 PathProgramCache]: Analyzing trace with hash 2052012019, now seen corresponding path program 19 times [2021-12-17 22:53:44,389 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 22:53:44,389 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499630479] [2021-12-17 22:53:44,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 22:53:44,389 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 22:53:44,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 22:53:45,053 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 22:53:45,053 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 22:53:45,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499630479] [2021-12-17 22:53:45,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499630479] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 22:53:45,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222933667] [2021-12-17 22:53:45,053 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-17 22:53:45,053 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 22:53:45,053 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 22:53:45,054 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 22:53:45,063 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-12-17 22:53:45,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 22:53:45,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 83 conjunts are in the unsatisfiable core [2021-12-17 22:53:45,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 22:53:45,876 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-17 22:53:45,877 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-17 22:53:45,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 14 [2021-12-17 22:53:45,915 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-17 22:53:45,915 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 22:53:46,220 INFO L354 Elim1Store]: treesize reduction 39, result has 52.4 percent of original size [2021-12-17 22:53:46,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 51 [2021-12-17 22:53:46,413 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-17 22:53:46,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [222933667] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 22:53:46,413 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 22:53:46,414 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 21, 14] total 51 [2021-12-17 22:53:46,414 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542693261] [2021-12-17 22:53:46,414 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 22:53:46,414 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-12-17 22:53:46,414 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 22:53:46,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-12-17 22:53:46,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=2372, Unknown=0, NotChecked=0, Total=2550 [2021-12-17 22:53:46,416 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 117 [2021-12-17 22:53:46,417 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 528 places, 1383 transitions, 24736 flow. Second operand has 51 states, 51 states have (on average 51.09803921568628) internal successors, (2606), 51 states have internal predecessors, (2606), 0 states have call successors, (0), 0 states 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 22:53:46,417 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 22:53:46,418 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 117 [2021-12-17 22:53:46,418 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 22:53:54,436 INFO L129 PetriNetUnfolder]: 9116/16411 cut-off events. [2021-12-17 22:53:54,437 INFO L130 PetriNetUnfolder]: For 289702/289819 co-relation queries the response was YES. [2021-12-17 22:53:54,692 INFO L84 FinitePrefix]: Finished finitePrefix Result has 130238 conditions, 16411 events. 9116/16411 cut-off events. For 289702/289819 co-relation queries the response was YES. Maximal size of possible extension queue 906. Compared 140313 event pairs, 1021 based on Foata normal form. 67/16415 useless extension candidates. Maximal degree in co-relation 130113. Up to 8862 conditions per place. [2021-12-17 22:53:54,772 INFO L132 encePairwiseOnDemand]: 83/117 looper letters, 1120 selfloop transitions, 760 changer transitions 8/1926 dead transitions. [2021-12-17 22:53:54,773 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 588 places, 1926 transitions, 35297 flow [2021-12-17 22:53:54,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-12-17 22:53:54,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2021-12-17 22:53:54,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 3375 transitions. [2021-12-17 22:53:54,776 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.45787545787545786 [2021-12-17 22:53:54,776 INFO L72 ComplementDD]: Start complementDD. Operand 63 states and 3375 transitions. [2021-12-17 22:53:54,776 INFO L73 IsDeterministic]: Start isDeterministic. Operand 63 states and 3375 transitions. [2021-12-17 22:53:54,776 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 22:53:54,776 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 63 states and 3375 transitions. [2021-12-17 22:53:54,779 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 64 states, 63 states have (on average 53.57142857142857) internal successors, (3375), 63 states have internal predecessors, (3375), 0 states have call successors, (0), 0 states 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 22:53:54,783 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 64 states, 64 states have (on average 117.0) internal successors, (7488), 64 states have internal predecessors, (7488), 0 states have call successors, (0), 0 states 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 22:53:54,783 INFO L81 ComplementDD]: Finished complementDD. Result has 64 states, 64 states have (on average 117.0) internal successors, (7488), 64 states have internal predecessors, (7488), 0 states have call successors, (0), 0 states 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 22:53:54,783 INFO L186 Difference]: Start difference. First operand has 528 places, 1383 transitions, 24736 flow. Second operand 63 states and 3375 transitions. [2021-12-17 22:53:54,784 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 588 places, 1926 transitions, 35297 flow [2021-12-17 22:53:57,050 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 541 places, 1926 transitions, 34146 flow, removed 133 selfloop flow, removed 47 redundant places. [2021-12-17 22:53:57,079 INFO L242 Difference]: Finished difference. Result has 555 places, 1520 transitions, 27641 flow [2021-12-17 22:53:57,080 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=23589, PETRI_DIFFERENCE_MINUEND_PLACES=479, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1383, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=643, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=707, PETRI_DIFFERENCE_SUBTRAHEND_STATES=63, PETRI_FLOW=27641, PETRI_PLACES=555, PETRI_TRANSITIONS=1520} [2021-12-17 22:53:57,081 INFO L334 CegarLoopForPetriNet]: 104 programPoint places, 451 predicate places. [2021-12-17 22:53:57,081 INFO L470 AbstractCegarLoop]: Abstraction has has 555 places, 1520 transitions, 27641 flow [2021-12-17 22:53:57,082 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 51.09803921568628) internal successors, (2606), 51 states have internal predecessors, (2606), 0 states have call successors, (0), 0 states 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 22:53:57,082 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 22:53:57,082 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 22:53:57,099 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2021-12-17 22:53:57,295 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-12-17 22:53:57,295 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 22:53:57,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 22:53:57,296 INFO L85 PathProgramCache]: Analyzing trace with hash 696189221, now seen corresponding path program 20 times [2021-12-17 22:53:57,296 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 22:53:57,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623277492] [2021-12-17 22:53:57,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 22:53:57,296 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 22:53:57,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 22:53:57,775 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-17 22:53:57,775 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 22:53:57,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623277492] [2021-12-17 22:53:57,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623277492] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 22:53:57,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [672712074] [2021-12-17 22:53:57,775 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 22:53:57,775 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 22:53:57,775 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 22:53:57,776 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 22:53:57,778 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-12-17 22:53:57,863 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 22:53:57,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 22:53:57,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 77 conjunts are in the unsatisfiable core [2021-12-17 22:53:57,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 22:53:58,402 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-17 22:53:58,403 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 22:53:58,646 INFO L354 Elim1Store]: treesize reduction 39, result has 52.4 percent of original size [2021-12-17 22:53:58,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 51 [2021-12-17 22:53:58,932 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-17 22:53:58,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [672712074] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 22:53:58,932 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 22:53:58,932 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 14] total 30 [2021-12-17 22:53:58,933 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943018424] [2021-12-17 22:53:58,933 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 22:53:58,933 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-12-17 22:53:58,933 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 22:53:58,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-12-17 22:53:58,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=788, Unknown=0, NotChecked=0, Total=870 [2021-12-17 22:53:58,935 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 117 [2021-12-17 22:53:58,947 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 555 places, 1520 transitions, 27641 flow. Second operand has 30 states, 30 states have (on average 61.3) internal successors, (1839), 30 states have internal predecessors, (1839), 0 states have call successors, (0), 0 states 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 22:53:58,947 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 22:53:58,947 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 117 [2021-12-17 22:53:58,947 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 22:54:07,320 INFO L129 PetriNetUnfolder]: 9214/16587 cut-off events. [2021-12-17 22:54:07,320 INFO L130 PetriNetUnfolder]: For 409077/409230 co-relation queries the response was YES. [2021-12-17 22:54:07,538 INFO L84 FinitePrefix]: Finished finitePrefix Result has 147426 conditions, 16587 events. 9214/16587 cut-off events. For 409077/409230 co-relation queries the response was YES. Maximal size of possible extension queue 908. Compared 143065 event pairs, 891 based on Foata normal form. 102/16635 useless extension candidates. Maximal degree in co-relation 147289. Up to 8151 conditions per place. [2021-12-17 22:54:07,625 INFO L132 encePairwiseOnDemand]: 95/117 looper letters, 934 selfloop transitions, 748 changer transitions 4/1744 dead transitions. [2021-12-17 22:54:07,625 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 581 places, 1744 transitions, 34018 flow [2021-12-17 22:54:07,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-17 22:54:07,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-12-17 22:54:07,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 2000 transitions. [2021-12-17 22:54:07,627 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5514199062586159 [2021-12-17 22:54:07,627 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 2000 transitions. [2021-12-17 22:54:07,628 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 2000 transitions. [2021-12-17 22:54:07,628 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 22:54:07,628 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 2000 transitions. [2021-12-17 22:54:07,630 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 64.51612903225806) internal successors, (2000), 31 states have internal predecessors, (2000), 0 states have call successors, (0), 0 states 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 22:54:07,631 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 117.0) internal successors, (3744), 32 states have internal predecessors, (3744), 0 states have call successors, (0), 0 states 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 22:54:07,632 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 117.0) internal successors, (3744), 32 states have internal predecessors, (3744), 0 states have call successors, (0), 0 states 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 22:54:07,632 INFO L186 Difference]: Start difference. First operand has 555 places, 1520 transitions, 27641 flow. Second operand 31 states and 2000 transitions. [2021-12-17 22:54:07,633 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 581 places, 1744 transitions, 34018 flow [2021-12-17 22:54:10,774 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 532 places, 1744 transitions, 32663 flow, removed 298 selfloop flow, removed 49 redundant places. [2021-12-17 22:54:10,805 INFO L242 Difference]: Finished difference. Result has 536 places, 1534 transitions, 28483 flow [2021-12-17 22:54:10,807 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=26330, PETRI_DIFFERENCE_MINUEND_PLACES=502, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1520, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=736, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=777, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=28483, PETRI_PLACES=536, PETRI_TRANSITIONS=1534} [2021-12-17 22:54:10,807 INFO L334 CegarLoopForPetriNet]: 104 programPoint places, 432 predicate places. [2021-12-17 22:54:10,808 INFO L470 AbstractCegarLoop]: Abstraction has has 536 places, 1534 transitions, 28483 flow [2021-12-17 22:54:10,808 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 61.3) internal successors, (1839), 30 states have internal predecessors, (1839), 0 states have call successors, (0), 0 states 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 22:54:10,808 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 22:54:10,808 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 22:54:10,828 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-12-17 22:54:11,026 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-12-17 22:54:11,026 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 22:54:11,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 22:54:11,027 INFO L85 PathProgramCache]: Analyzing trace with hash -1829982089, now seen corresponding path program 21 times [2021-12-17 22:54:11,027 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 22:54:11,027 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968647594] [2021-12-17 22:54:11,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 22:54:11,028 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 22:54:11,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 22:54:11,625 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-17 22:54:11,626 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 22:54:11,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968647594] [2021-12-17 22:54:11,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968647594] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 22:54:11,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1339472268] [2021-12-17 22:54:11,626 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-17 22:54:11,626 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 22:54:11,626 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 22:54:11,639 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 22:54:11,661 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-12-17 22:54:11,770 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-17 22:54:11,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 22:54:11,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 98 conjunts are in the unsatisfiable core [2021-12-17 22:54:11,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 22:54:12,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 22:54:12,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-17 22:54:13,082 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:54:13,483 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-17 22:54:13,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 18 [2021-12-17 22:54:14,041 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 22:54:14,041 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 22:54:14,326 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:54:15,434 INFO L354 Elim1Store]: treesize reduction 60, result has 29.4 percent of original size [2021-12-17 22:54:15,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 76 treesize of output 64 [2021-12-17 22:54:15,450 INFO L354 Elim1Store]: treesize reduction 26, result has 36.6 percent of original size [2021-12-17 22:54:15,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 27 [2021-12-17 22:54:16,584 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 22:54:16,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1339472268] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 22:54:16,585 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 22:54:16,585 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 35, 36] total 82 [2021-12-17 22:54:16,585 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776871929] [2021-12-17 22:54:16,585 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 22:54:16,586 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2021-12-17 22:54:16,586 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 22:54:16,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2021-12-17 22:54:16,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=526, Invalid=6115, Unknown=1, NotChecked=0, Total=6642 [2021-12-17 22:54:16,600 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 117 [2021-12-17 22:54:16,602 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 536 places, 1534 transitions, 28483 flow. Second operand has 82 states, 82 states have (on average 45.41463414634146) internal successors, (3724), 82 states have internal predecessors, (3724), 0 states have call successors, (0), 0 states 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 22:54:16,603 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 22:54:16,603 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 117 [2021-12-17 22:54:16,603 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 22:54:54,172 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (+ |c_thread1Thread1of1ForFork0_~i~0#1| 1))) (and (or (<= c_~N~0 .cse0) (and (not (= c_~A~0.base |c_ULTIMATE.start_main_~#t2~0#1.base|)) (= 0 (* 4 |c_thread1Thread1of1ForFork0_~i~0#1|)) (= c_~counter~0 0))) (forall ((v_ArrVal_658 (Array Int Int)) (|v_thread1Thread1of1ForFork0_~i~0#1_90| Int) (|v_thread2Thread1of1ForFork1_~i~1#1_92| Int)) (or (<= c_~N~0 |v_thread1Thread1of1ForFork0_~i~0#1_90|) (<= c_~N~0 |v_thread2Thread1of1ForFork1_~i~1#1_92|) (< |v_thread1Thread1of1ForFork0_~i~0#1_90| (+ |c_thread1Thread1of1ForFork0_~i~0#1| 1)) (< (+ |v_thread2Thread1of1ForFork1_~i~1#1_92| 1) c_~N~0) (< (+ |v_thread1Thread1of1ForFork0_~i~0#1_90| 1) c_~N~0) (let ((.cse1 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_658) c_~A~0.base))) (= (+ c_~counter~0 (select .cse1 (+ c_~A~0.offset (* |v_thread1Thread1of1ForFork0_~i~0#1_90| 4)))) (+ (select .cse1 c_~A~0.offset) (select .cse1 (+ c_~A~0.offset (* |v_thread2Thread1of1ForFork1_~i~1#1_92| 4)))))))) (forall ((v_arrayElimCell_70 Int) (v_arrayElimCell_67 Int)) (or (and (not (= c_~A~0.base |c_ULTIMATE.start_main_~#t2~0#1.base|)) (= 0 (* 4 |c_thread1Thread1of1ForFork0_~i~0#1|)) (= c_~counter~0 0)) (let ((.cse2 (<= c_~N~0 (+ |c_thread1Thread1of1ForFork0_~i~0#1| 1)))) (and (or (<= c_~N~0 1) .cse2) (or .cse2 (<= 1 c_~N~0)) (or .cse2 (not (= v_arrayElimCell_67 v_arrayElimCell_70))))))) (or (forall ((|v_thread2Thread1of1ForFork1_~i~1#1_92| Int)) (or (<= c_~N~0 |v_thread2Thread1of1ForFork1_~i~1#1_92|) (= c_~counter~0 (let ((.cse3 (select |c_#memory_int| c_~A~0.base))) (+ (select .cse3 (+ c_~A~0.offset (* |c_thread2Thread1of1ForFork1_~i~1#1| 4))) (select .cse3 (+ c_~A~0.offset (* |v_thread2Thread1of1ForFork1_~i~1#1_92| 4)))))) (< (+ |v_thread2Thread1of1ForFork1_~i~1#1_92| 1) c_~N~0))) (< .cse0 c_~N~0)))) is different from false [2021-12-17 22:54:57,499 WARN L838 $PredicateComparison]: unable to prove that (and (or (< (+ |c_thread1Thread1of1ForFork0_#t~post1#1| 1) c_~N~0) (forall ((|v_thread2Thread1of1ForFork1_~i~1#1_92| Int)) (or (<= c_~N~0 |v_thread2Thread1of1ForFork1_~i~1#1_92|) (= c_~counter~0 (let ((.cse0 (select |c_#memory_int| c_~A~0.base))) (+ (select .cse0 (+ c_~A~0.offset (* |c_thread2Thread1of1ForFork1_~i~1#1| 4))) (select .cse0 (+ c_~A~0.offset (* |v_thread2Thread1of1ForFork1_~i~1#1_92| 4)))))) (< (+ |v_thread2Thread1of1ForFork1_~i~1#1_92| 1) c_~N~0)))) (forall ((|v_thread1Thread1of1ForFork0_~i~0#1_90| Int)) (or (<= c_~N~0 |v_thread1Thread1of1ForFork0_~i~0#1_90|) (< (+ |v_thread1Thread1of1ForFork0_~i~0#1_90| 1) c_~N~0) (forall ((v_ArrVal_658 (Array Int Int)) (|v_thread2Thread1of1ForFork1_~i~1#1_92| Int)) (or (<= c_~N~0 |v_thread2Thread1of1ForFork1_~i~1#1_92|) (< (+ |v_thread2Thread1of1ForFork1_~i~1#1_92| 1) c_~N~0) (let ((.cse1 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_658) c_~A~0.base))) (= (+ c_~counter~0 (select .cse1 (+ c_~A~0.offset (* |v_thread1Thread1of1ForFork0_~i~0#1_90| 4)))) (+ (select .cse1 c_~A~0.offset) (select .cse1 (+ c_~A~0.offset (* |v_thread2Thread1of1ForFork1_~i~1#1_92| 4)))))))) (< |v_thread1Thread1of1ForFork0_~i~0#1_90| (+ |c_thread1Thread1of1ForFork0_#t~post1#1| 1))))) is different from false [2021-12-17 22:56:27,902 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_658 (Array Int Int)) (|v_thread1Thread1of1ForFork0_~i~0#1_90| Int) (|v_thread2Thread1of1ForFork1_~i~1#1_92| Int)) (or (<= c_~N~0 |v_thread1Thread1of1ForFork0_~i~0#1_90|) (<= c_~N~0 |v_thread2Thread1of1ForFork1_~i~1#1_92|) (< |v_thread1Thread1of1ForFork0_~i~0#1_90| (+ |c_thread1Thread1of1ForFork0_~i~0#1| 1)) (< (+ |v_thread2Thread1of1ForFork1_~i~1#1_92| 1) c_~N~0) (< (+ |v_thread1Thread1of1ForFork0_~i~0#1_90| 1) c_~N~0) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_658) c_~A~0.base))) (= (+ c_~counter~0 (select .cse0 (+ c_~A~0.offset (* |v_thread1Thread1of1ForFork0_~i~0#1_90| 4)))) (+ (select .cse0 c_~A~0.offset) (select .cse0 (+ c_~A~0.offset (* |v_thread2Thread1of1ForFork1_~i~1#1_92| 4)))))))) (forall ((|v_thread1Thread1of1ForFork0_~i~0#1_90| Int)) (or (<= c_~N~0 |v_thread1Thread1of1ForFork0_~i~0#1_90|) (< (+ |v_thread1Thread1of1ForFork0_~i~0#1_90| 1) c_~N~0) (forall ((v_ArrVal_658 (Array Int Int)) (|v_thread2Thread1of1ForFork1_~i~1#1_92| Int)) (or (<= c_~N~0 |v_thread2Thread1of1ForFork1_~i~1#1_92|) (< (+ |v_thread2Thread1of1ForFork1_~i~1#1_92| 1) c_~N~0) (let ((.cse1 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_658) c_~A~0.base))) (= (+ c_~counter~0 (select .cse1 (+ c_~A~0.offset (* |v_thread1Thread1of1ForFork0_~i~0#1_90| 4)))) (+ (select .cse1 c_~A~0.offset) (select .cse1 (+ c_~A~0.offset (* |v_thread2Thread1of1ForFork1_~i~1#1_92| 4)))))))) (< |v_thread1Thread1of1ForFork0_~i~0#1_90| (+ |c_thread1Thread1of1ForFork0_#t~post1#1| 1)))) (or (< |c_thread2Thread1of1ForFork1_~i~1#1| c_~N~0) (= c_~counter~0 0))) is different from false [2021-12-17 22:56:44,496 INFO L129 PetriNetUnfolder]: 17469/31275 cut-off events. [2021-12-17 22:56:44,496 INFO L130 PetriNetUnfolder]: For 817475/817601 co-relation queries the response was YES. [2021-12-17 22:56:45,251 INFO L84 FinitePrefix]: Finished finitePrefix Result has 284220 conditions, 31275 events. 17469/31275 cut-off events. For 817475/817601 co-relation queries the response was YES. Maximal size of possible extension queue 1569. Compared 291340 event pairs, 1146 based on Foata normal form. 65/31285 useless extension candidates. Maximal degree in co-relation 284082. Up to 9917 conditions per place. [2021-12-17 22:56:45,577 INFO L132 encePairwiseOnDemand]: 79/117 looper letters, 1572 selfloop transitions, 3426 changer transitions 9/5042 dead transitions. [2021-12-17 22:56:45,578 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 793 places, 5042 transitions, 97329 flow [2021-12-17 22:56:45,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 260 states. [2021-12-17 22:56:45,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 260 states. [2021-12-17 22:56:45,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 12435 transitions. [2021-12-17 22:56:45,611 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.40877712031558183 [2021-12-17 22:56:45,611 INFO L72 ComplementDD]: Start complementDD. Operand 260 states and 12435 transitions. [2021-12-17 22:56:45,612 INFO L73 IsDeterministic]: Start isDeterministic. Operand 260 states and 12435 transitions. [2021-12-17 22:56:45,614 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 22:56:45,627 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 260 states and 12435 transitions. [2021-12-17 22:56:45,650 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 261 states, 260 states have (on average 47.82692307692308) internal successors, (12435), 260 states have internal predecessors, (12435), 0 states have call successors, (0), 0 states 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 22:56:45,713 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 261 states, 261 states have (on average 117.0) internal successors, (30537), 261 states have internal predecessors, (30537), 0 states have call successors, (0), 0 states 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 22:56:45,724 INFO L81 ComplementDD]: Finished complementDD. Result has 261 states, 261 states have (on average 117.0) internal successors, (30537), 261 states have internal predecessors, (30537), 0 states have call successors, (0), 0 states 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 22:56:45,724 INFO L186 Difference]: Start difference. First operand has 536 places, 1534 transitions, 28483 flow. Second operand 260 states and 12435 transitions. [2021-12-17 22:56:45,724 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 793 places, 5042 transitions, 97329 flow [2021-12-17 22:56:52,273 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 768 places, 5042 transitions, 95293 flow, removed 309 selfloop flow, removed 25 redundant places. [2021-12-17 22:56:52,356 INFO L242 Difference]: Finished difference. Result has 851 places, 4254 transitions, 84951 flow [2021-12-17 22:56:52,358 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=27582, PETRI_DIFFERENCE_MINUEND_PLACES=509, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1534, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=935, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=468, PETRI_DIFFERENCE_SUBTRAHEND_STATES=260, PETRI_FLOW=84951, PETRI_PLACES=851, PETRI_TRANSITIONS=4254} [2021-12-17 22:56:52,358 INFO L334 CegarLoopForPetriNet]: 104 programPoint places, 747 predicate places. [2021-12-17 22:56:52,359 INFO L470 AbstractCegarLoop]: Abstraction has has 851 places, 4254 transitions, 84951 flow [2021-12-17 22:56:52,359 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 45.41463414634146) internal successors, (3724), 82 states have internal predecessors, (3724), 0 states have call successors, (0), 0 states 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 22:56:52,359 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 22:56:52,359 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 22:56:52,376 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-12-17 22:56:52,583 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 22:56:52,583 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 22:56:52,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 22:56:52,584 INFO L85 PathProgramCache]: Analyzing trace with hash 1013685997, now seen corresponding path program 22 times [2021-12-17 22:56:52,584 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 22:56:52,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446111187] [2021-12-17 22:56:52,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 22:56:52,584 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 22:56:52,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 22:56:53,195 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 22:56:53,195 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 22:56:53,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446111187] [2021-12-17 22:56:53,195 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446111187] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 22:56:53,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557045331] [2021-12-17 22:56:53,195 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-17 22:56:53,195 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 22:56:53,195 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 22:56:53,196 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 22:56:53,197 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-12-17 22:56:53,308 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-17 22:56:53,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 22:56:53,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 94 conjunts are in the unsatisfiable core [2021-12-17 22:56:53,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 22:56:53,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 22:56:53,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2021-12-17 22:56:54,177 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-17 22:56:54,178 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 22:56:54,412 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_687 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_687) c_~A~0.base))) (= (+ c_~counter~0 (select .cse0 (+ c_~A~0.offset (* |c_thread1Thread1of1ForFork0_~i~0#1| 4)))) (+ (select .cse0 (+ c_~A~0.offset 4)) (select .cse0 c_~A~0.offset))))) is different from false [2021-12-17 22:56:54,436 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_687 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_687) c_~A~0.base))) (= (+ c_~counter~0 (select .cse0 (+ c_~A~0.offset (* |c_thread1Thread1of1ForFork0_#t~post1#1| 4) 4))) (+ (select .cse0 (+ c_~A~0.offset 4)) (select .cse0 c_~A~0.offset))))) is different from false [2021-12-17 22:56:54,442 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_687 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_687) c_~A~0.base))) (= (+ c_~counter~0 (select .cse0 (+ c_~A~0.offset (* |c_thread1Thread1of1ForFork0_~i~0#1| 4) 4))) (+ (select .cse0 (+ c_~A~0.offset 4)) (select .cse0 c_~A~0.offset))))) is different from false [2021-12-17 22:56:54,487 INFO L354 Elim1Store]: treesize reduction 39, result has 52.4 percent of original size [2021-12-17 22:56:54,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 74 treesize of output 81 [2021-12-17 22:56:54,507 INFO L354 Elim1Store]: treesize reduction 16, result has 59.0 percent of original size [2021-12-17 22:56:54,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 35 [2021-12-17 22:56:55,173 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 9 trivial. 3 not checked. [2021-12-17 22:56:55,173 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [557045331] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 22:56:55,173 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 22:56:55,173 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 23, 21] total 56 [2021-12-17 22:56:55,173 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992615755] [2021-12-17 22:56:55,173 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 22:56:55,174 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2021-12-17 22:56:55,174 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 22:56:55,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-12-17 22:56:55,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=2573, Unknown=3, NotChecked=312, Total=3080 [2021-12-17 22:56:55,182 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 117 [2021-12-17 22:56:55,183 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 851 places, 4254 transitions, 84951 flow. Second operand has 56 states, 56 states have (on average 48.035714285714285) internal successors, (2690), 56 states have internal predecessors, (2690), 0 states have call successors, (0), 0 states 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 22:56:55,183 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 22:56:55,183 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 117 [2021-12-17 22:56:55,183 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand