/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/popl20-horseshoe.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-b8dbc81 [2023-01-28 10:30:40,703 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-01-28 10:30:40,705 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-01-28 10:30:40,738 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-01-28 10:30:40,738 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-01-28 10:30:40,740 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-01-28 10:30:40,742 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-01-28 10:30:40,743 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-01-28 10:30:40,744 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-01-28 10:30:40,745 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-01-28 10:30:40,746 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-01-28 10:30:40,748 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-01-28 10:30:40,748 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-01-28 10:30:40,752 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-01-28 10:30:40,753 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-01-28 10:30:40,753 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-01-28 10:30:40,754 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-01-28 10:30:40,755 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-01-28 10:30:40,756 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-01-28 10:30:40,757 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-01-28 10:30:40,758 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-01-28 10:30:40,759 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-01-28 10:30:40,760 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-01-28 10:30:40,760 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-01-28 10:30:40,769 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-01-28 10:30:40,769 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-01-28 10:30:40,769 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-01-28 10:30:40,770 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-01-28 10:30:40,770 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-01-28 10:30:40,771 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-01-28 10:30:40,771 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-01-28 10:30:40,771 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-01-28 10:30:40,772 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-01-28 10:30:40,773 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-01-28 10:30:40,773 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-01-28 10:30:40,773 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-01-28 10:30:40,774 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-01-28 10:30:40,774 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-01-28 10:30:40,774 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-01-28 10:30:40,775 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-01-28 10:30:40,775 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-01-28 10:30:40,780 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf [2023-01-28 10:30:40,807 INFO L113 SettingsManager]: Loading preferences was successful [2023-01-28 10:30:40,807 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-01-28 10:30:40,808 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-01-28 10:30:40,808 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-01-28 10:30:40,809 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-01-28 10:30:40,809 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-01-28 10:30:40,809 INFO L138 SettingsManager]: * Use SBE=true [2023-01-28 10:30:40,809 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-01-28 10:30:40,809 INFO L138 SettingsManager]: * sizeof long=4 [2023-01-28 10:30:40,809 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-01-28 10:30:40,810 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-01-28 10:30:40,810 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-01-28 10:30:40,810 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-01-28 10:30:40,811 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-01-28 10:30:40,811 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-01-28 10:30:40,811 INFO L138 SettingsManager]: * sizeof long double=12 [2023-01-28 10:30:40,811 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-01-28 10:30:40,811 INFO L138 SettingsManager]: * Use constant arrays=true [2023-01-28 10:30:40,811 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-01-28 10:30:40,811 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-01-28 10:30:40,811 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-01-28 10:30:40,811 INFO L138 SettingsManager]: * To the following directory=./dump/ [2023-01-28 10:30:40,812 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-01-28 10:30:40,812 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-28 10:30:40,812 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-01-28 10:30:40,812 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-01-28 10:30:40,812 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-01-28 10:30:40,812 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-01-28 10:30:40,812 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-01-28 10:30:40,813 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-01-28 10:30:40,813 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-01-28 10:30:40,813 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-01-28 10:30:41,021 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-01-28 10:30:41,037 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-01-28 10:30:41,039 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-01-28 10:30:41,039 INFO L271 PluginConnector]: Initializing CDTParser... [2023-01-28 10:30:41,040 INFO L275 PluginConnector]: CDTParser initialized [2023-01-28 10:30:41,041 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-horseshoe.wvr.c [2023-01-28 10:30:42,088 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-01-28 10:30:42,252 INFO L351 CDTParser]: Found 1 translation units. [2023-01-28 10:30:42,253 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-horseshoe.wvr.c [2023-01-28 10:30:42,259 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/013da93ad/378f0d603bd94488b5f13afa88007a7c/FLAGaaaf04501 [2023-01-28 10:30:42,268 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/013da93ad/378f0d603bd94488b5f13afa88007a7c [2023-01-28 10:30:42,270 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-01-28 10:30:42,271 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2023-01-28 10:30:42,272 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-01-28 10:30:42,272 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-01-28 10:30:42,277 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-01-28 10:30:42,277 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.01 10:30:42" (1/1) ... [2023-01-28 10:30:42,278 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7dfca7b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 10:30:42, skipping insertion in model container [2023-01-28 10:30:42,278 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.01 10:30:42" (1/1) ... [2023-01-28 10:30:42,285 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-01-28 10:30:42,307 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-01-28 10:30:42,466 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-horseshoe.wvr.c[3424,3437] [2023-01-28 10:30:42,481 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-28 10:30:42,490 INFO L203 MainTranslator]: Completed pre-run [2023-01-28 10:30:42,524 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-horseshoe.wvr.c[3424,3437] [2023-01-28 10:30:42,526 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-28 10:30:42,536 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-01-28 10:30:42,537 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-01-28 10:30:42,543 INFO L208 MainTranslator]: Completed translation [2023-01-28 10:30:42,544 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 10:30:42 WrapperNode [2023-01-28 10:30:42,544 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-01-28 10:30:42,545 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-01-28 10:30:42,546 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-01-28 10:30:42,546 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-01-28 10:30:42,551 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 10:30:42" (1/1) ... [2023-01-28 10:30:42,567 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 10:30:42" (1/1) ... [2023-01-28 10:30:42,604 INFO L138 Inliner]: procedures = 25, calls = 55, calls flagged for inlining = 16, calls inlined = 18, statements flattened = 252 [2023-01-28 10:30:42,604 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-01-28 10:30:42,605 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-01-28 10:30:42,605 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-01-28 10:30:42,605 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-01-28 10:30:42,612 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 10:30:42" (1/1) ... [2023-01-28 10:30:42,613 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 10:30:42" (1/1) ... [2023-01-28 10:30:42,615 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 10:30:42" (1/1) ... [2023-01-28 10:30:42,615 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 10:30:42" (1/1) ... [2023-01-28 10:30:42,629 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 10:30:42" (1/1) ... [2023-01-28 10:30:42,633 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 10:30:42" (1/1) ... [2023-01-28 10:30:42,634 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 10:30:42" (1/1) ... [2023-01-28 10:30:42,636 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 10:30:42" (1/1) ... [2023-01-28 10:30:42,638 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-01-28 10:30:42,639 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-01-28 10:30:42,639 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-01-28 10:30:42,639 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-01-28 10:30:42,640 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 10:30:42" (1/1) ... [2023-01-28 10:30:42,644 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-28 10:30:42,655 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:30:42,674 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) [2023-01-28 10:30:42,713 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 [2023-01-28 10:30:42,728 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-01-28 10:30:42,728 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-01-28 10:30:42,728 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-01-28 10:30:42,728 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-01-28 10:30:42,728 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-01-28 10:30:42,728 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-01-28 10:30:42,729 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-01-28 10:30:42,729 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-01-28 10:30:42,729 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-01-28 10:30:42,729 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-01-28 10:30:42,729 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-01-28 10:30:42,729 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-01-28 10:30:42,729 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-01-28 10:30:42,729 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-01-28 10:30:42,729 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-01-28 10:30:42,729 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-01-28 10:30:42,730 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-01-28 10:30:42,731 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-01-28 10:30:42,853 INFO L236 CfgBuilder]: Building ICFG [2023-01-28 10:30:42,854 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-01-28 10:30:43,175 INFO L277 CfgBuilder]: Performing block encoding [2023-01-28 10:30:43,291 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-01-28 10:30:43,291 INFO L302 CfgBuilder]: Removed 5 assume(true) statements. [2023-01-28 10:30:43,293 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.01 10:30:43 BoogieIcfgContainer [2023-01-28 10:30:43,293 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-01-28 10:30:43,294 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-01-28 10:30:43,295 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-01-28 10:30:43,297 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-01-28 10:30:43,297 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.01 10:30:42" (1/3) ... [2023-01-28 10:30:43,298 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26d3322d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.01 10:30:43, skipping insertion in model container [2023-01-28 10:30:43,298 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 10:30:42" (2/3) ... [2023-01-28 10:30:43,298 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26d3322d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.01 10:30:43, skipping insertion in model container [2023-01-28 10:30:43,298 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.01 10:30:43" (3/3) ... [2023-01-28 10:30:43,299 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-horseshoe.wvr.c [2023-01-28 10:30:43,311 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-01-28 10:30:43,311 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-01-28 10:30:43,312 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-01-28 10:30:43,383 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-01-28 10:30:43,413 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 193 places, 201 transitions, 426 flow [2023-01-28 10:30:43,495 INFO L130 PetriNetUnfolder]: 18/198 cut-off events. [2023-01-28 10:30:43,495 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-01-28 10:30:43,500 INFO L83 FinitePrefix]: Finished finitePrefix Result has 211 conditions, 198 events. 18/198 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 116 event pairs, 0 based on Foata normal form. 0/179 useless extension candidates. Maximal degree in co-relation 162. Up to 3 conditions per place. [2023-01-28 10:30:43,500 INFO L82 GeneralOperation]: Start removeDead. Operand has 193 places, 201 transitions, 426 flow [2023-01-28 10:30:43,508 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 180 places, 188 transitions, 394 flow [2023-01-28 10:30:43,511 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 10:30:43,519 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 180 places, 188 transitions, 394 flow [2023-01-28 10:30:43,522 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 180 places, 188 transitions, 394 flow [2023-01-28 10:30:43,522 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 180 places, 188 transitions, 394 flow [2023-01-28 10:30:43,580 INFO L130 PetriNetUnfolder]: 18/188 cut-off events. [2023-01-28 10:30:43,580 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-01-28 10:30:43,582 INFO L83 FinitePrefix]: Finished finitePrefix Result has 201 conditions, 188 events. 18/188 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 115 event pairs, 0 based on Foata normal form. 0/170 useless extension candidates. Maximal degree in co-relation 162. Up to 3 conditions per place. [2023-01-28 10:30:43,584 INFO L119 LiptonReduction]: Number of co-enabled transitions 1456 [2023-01-28 10:30:49,730 INFO L134 LiptonReduction]: Checked pairs total: 2169 [2023-01-28 10:30:49,730 INFO L136 LiptonReduction]: Total number of compositions: 199 [2023-01-28 10:30:49,741 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-28 10:30:49,746 INFO L357 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=false, 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@63f8e0c5, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 10:30:49,747 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-01-28 10:30:49,753 INFO L130 PetriNetUnfolder]: 6/27 cut-off events. [2023-01-28 10:30:49,753 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-01-28 10:30:49,754 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:30:49,754 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:30:49,755 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 10:30:49,758 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:30:49,759 INFO L85 PathProgramCache]: Analyzing trace with hash -1991589664, now seen corresponding path program 1 times [2023-01-28 10:30:49,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:30:49,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602965927] [2023-01-28 10:30:49,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:30:49,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:30:49,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:30:49,986 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:30:49,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:30:49,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602965927] [2023-01-28 10:30:49,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602965927] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 10:30:49,987 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 10:30:49,987 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-28 10:30:49,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95169947] [2023-01-28 10:30:49,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 10:30:49,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-01-28 10:30:49,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:30:50,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-01-28 10:30:50,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-01-28 10:30:50,016 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 176 out of 400 [2023-01-28 10:30:50,018 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 28 transitions, 74 flow. Second operand has 2 states, 2 states have (on average 185.0) internal successors, (370), 2 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:30:50,018 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:30:50,018 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 176 of 400 [2023-01-28 10:30:50,019 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:30:50,151 INFO L130 PetriNetUnfolder]: 321/458 cut-off events. [2023-01-28 10:30:50,151 INFO L131 PetriNetUnfolder]: For 31/31 co-relation queries the response was YES. [2023-01-28 10:30:50,154 INFO L83 FinitePrefix]: Finished finitePrefix Result has 959 conditions, 458 events. 321/458 cut-off events. For 31/31 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1470 event pairs, 166 based on Foata normal form. 0/294 useless extension candidates. Maximal degree in co-relation 732. Up to 449 conditions per place. [2023-01-28 10:30:50,159 INFO L137 encePairwiseOnDemand]: 399/400 looper letters, 24 selfloop transitions, 0 changer transitions 0/27 dead transitions. [2023-01-28 10:30:50,159 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 27 transitions, 120 flow [2023-01-28 10:30:50,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-01-28 10:30:50,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-01-28 10:30:50,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 377 transitions. [2023-01-28 10:30:50,180 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47125 [2023-01-28 10:30:50,181 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 377 transitions. [2023-01-28 10:30:50,181 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 377 transitions. [2023-01-28 10:30:50,185 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:30:50,187 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 377 transitions. [2023-01-28 10:30:50,192 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 188.5) internal successors, (377), 2 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:30:50,203 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 400.0) internal successors, (1200), 3 states have internal predecessors, (1200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:30:50,204 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 400.0) internal successors, (1200), 3 states have internal predecessors, (1200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:30:50,206 INFO L175 Difference]: Start difference. First operand has 32 places, 28 transitions, 74 flow. Second operand 2 states and 377 transitions. [2023-01-28 10:30:50,207 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 27 transitions, 120 flow [2023-01-28 10:30:50,211 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 27 transitions, 108 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-01-28 10:30:50,213 INFO L231 Difference]: Finished difference. Result has 27 places, 27 transitions, 60 flow [2023-01-28 10:30:50,214 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=400, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=60, PETRI_PLACES=27, PETRI_TRANSITIONS=27} [2023-01-28 10:30:50,219 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, -5 predicate places. [2023-01-28 10:30:50,220 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 27 transitions, 60 flow [2023-01-28 10:30:50,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 185.0) internal successors, (370), 2 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:30:50,220 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:30:50,220 INFO L208 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] [2023-01-28 10:30:50,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-01-28 10:30:50,221 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 10:30:50,221 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:30:50,221 INFO L85 PathProgramCache]: Analyzing trace with hash 1850484059, now seen corresponding path program 1 times [2023-01-28 10:30:50,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:30:50,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139524258] [2023-01-28 10:30:50,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:30:50,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:30:50,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:30:50,579 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:30:50,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:30:50,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139524258] [2023-01-28 10:30:50,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139524258] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 10:30:50,586 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 10:30:50,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-01-28 10:30:50,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902230619] [2023-01-28 10:30:50,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 10:30:50,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-01-28 10:30:50,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:30:50,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-01-28 10:30:50,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-01-28 10:30:50,590 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 400 [2023-01-28 10:30:50,590 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 27 transitions, 60 flow. Second operand has 4 states, 4 states have (on average 155.75) internal successors, (623), 4 states have internal predecessors, (623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:30:50,591 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:30:50,591 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 400 [2023-01-28 10:30:50,591 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:30:50,699 INFO L130 PetriNetUnfolder]: 326/478 cut-off events. [2023-01-28 10:30:50,699 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-01-28 10:30:50,700 INFO L83 FinitePrefix]: Finished finitePrefix Result has 965 conditions, 478 events. 326/478 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1521 event pairs, 167 based on Foata normal form. 16/336 useless extension candidates. Maximal degree in co-relation 962. Up to 449 conditions per place. [2023-01-28 10:30:50,702 INFO L137 encePairwiseOnDemand]: 394/400 looper letters, 23 selfloop transitions, 2 changer transitions 11/39 dead transitions. [2023-01-28 10:30:50,702 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 39 transitions, 159 flow [2023-01-28 10:30:50,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-01-28 10:30:50,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-01-28 10:30:50,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 643 transitions. [2023-01-28 10:30:50,706 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.401875 [2023-01-28 10:30:50,706 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 643 transitions. [2023-01-28 10:30:50,706 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 643 transitions. [2023-01-28 10:30:50,706 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:30:50,706 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 643 transitions. [2023-01-28 10:30:50,708 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 160.75) internal successors, (643), 4 states have internal predecessors, (643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:30:50,713 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 400.0) internal successors, (2000), 5 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) [2023-01-28 10:30:50,714 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 400.0) internal successors, (2000), 5 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) [2023-01-28 10:30:50,714 INFO L175 Difference]: Start difference. First operand has 27 places, 27 transitions, 60 flow. Second operand 4 states and 643 transitions. [2023-01-28 10:30:50,714 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 39 transitions, 159 flow [2023-01-28 10:30:50,715 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 39 transitions, 159 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-01-28 10:30:50,717 INFO L231 Difference]: Finished difference. Result has 32 places, 28 transitions, 78 flow [2023-01-28 10:30:50,717 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=400, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=78, PETRI_PLACES=32, PETRI_TRANSITIONS=28} [2023-01-28 10:30:50,717 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 0 predicate places. [2023-01-28 10:30:50,717 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 28 transitions, 78 flow [2023-01-28 10:30:50,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 155.75) internal successors, (623), 4 states have internal predecessors, (623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:30:50,718 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:30:50,718 INFO L208 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] [2023-01-28 10:30:50,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-01-28 10:30:50,719 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 10:30:50,721 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:30:50,721 INFO L85 PathProgramCache]: Analyzing trace with hash 1330974784, now seen corresponding path program 1 times [2023-01-28 10:30:50,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:30:50,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268438125] [2023-01-28 10:30:50,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:30:50,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:30:50,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:30:50,900 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 10:30:50,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:30:50,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268438125] [2023-01-28 10:30:50,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268438125] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 10:30:50,901 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 10:30:50,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-01-28 10:30:50,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446050294] [2023-01-28 10:30:50,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 10:30:50,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-01-28 10:30:50,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:30:50,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-01-28 10:30:50,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-01-28 10:30:50,905 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 400 [2023-01-28 10:30:50,906 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 28 transitions, 78 flow. Second operand has 4 states, 4 states have (on average 156.0) internal successors, (624), 4 states have internal predecessors, (624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:30:50,906 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:30:50,906 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 400 [2023-01-28 10:30:50,906 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:30:51,030 INFO L130 PetriNetUnfolder]: 368/551 cut-off events. [2023-01-28 10:30:51,031 INFO L131 PetriNetUnfolder]: For 137/137 co-relation queries the response was YES. [2023-01-28 10:30:51,032 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1347 conditions, 551 events. 368/551 cut-off events. For 137/137 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 1947 event pairs, 194 based on Foata normal form. 24/403 useless extension candidates. Maximal degree in co-relation 1341. Up to 447 conditions per place. [2023-01-28 10:30:51,035 INFO L137 encePairwiseOnDemand]: 392/400 looper letters, 23 selfloop transitions, 3 changer transitions 12/41 dead transitions. [2023-01-28 10:30:51,035 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 41 transitions, 190 flow [2023-01-28 10:30:51,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-28 10:30:51,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-28 10:30:51,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 796 transitions. [2023-01-28 10:30:51,040 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.398 [2023-01-28 10:30:51,040 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 796 transitions. [2023-01-28 10:30:51,040 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 796 transitions. [2023-01-28 10:30:51,040 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:30:51,040 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 796 transitions. [2023-01-28 10:30:51,042 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 159.2) internal successors, (796), 5 states have internal predecessors, (796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:30:51,045 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 400.0) internal successors, (2400), 6 states have internal predecessors, (2400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:30:51,047 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 400.0) internal successors, (2400), 6 states have internal predecessors, (2400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:30:51,047 INFO L175 Difference]: Start difference. First operand has 32 places, 28 transitions, 78 flow. Second operand 5 states and 796 transitions. [2023-01-28 10:30:51,047 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 41 transitions, 190 flow [2023-01-28 10:30:51,048 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 41 transitions, 186 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-01-28 10:30:51,049 INFO L231 Difference]: Finished difference. Result has 36 places, 29 transitions, 96 flow [2023-01-28 10:30:51,049 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=400, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=96, PETRI_PLACES=36, PETRI_TRANSITIONS=29} [2023-01-28 10:30:51,050 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 4 predicate places. [2023-01-28 10:30:51,053 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 29 transitions, 96 flow [2023-01-28 10:30:51,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 156.0) internal successors, (624), 4 states have internal predecessors, (624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:30:51,054 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:30:51,054 INFO L208 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] [2023-01-28 10:30:51,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-01-28 10:30:51,055 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 10:30:51,055 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:30:51,055 INFO L85 PathProgramCache]: Analyzing trace with hash 80366818, now seen corresponding path program 1 times [2023-01-28 10:30:51,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:30:51,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225443797] [2023-01-28 10:30:51,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:30:51,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:30:51,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:30:51,230 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 10:30:51,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:30:51,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225443797] [2023-01-28 10:30:51,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225443797] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 10:30:51,231 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 10:30:51,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-28 10:30:51,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318449766] [2023-01-28 10:30:51,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 10:30:51,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-28 10:30:51,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:30:51,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-28 10:30:51,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-28 10:30:51,235 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 400 [2023-01-28 10:30:51,235 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 29 transitions, 96 flow. Second operand has 3 states, 3 states have (on average 179.0) internal successors, (537), 3 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:30:51,236 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:30:51,236 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 400 [2023-01-28 10:30:51,236 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:30:51,355 INFO L130 PetriNetUnfolder]: 340/486 cut-off events. [2023-01-28 10:30:51,355 INFO L131 PetriNetUnfolder]: For 145/169 co-relation queries the response was YES. [2023-01-28 10:30:51,356 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1368 conditions, 486 events. 340/486 cut-off events. For 145/169 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1458 event pairs, 48 based on Foata normal form. 10/329 useless extension candidates. Maximal degree in co-relation 1360. Up to 390 conditions per place. [2023-01-28 10:30:51,358 INFO L137 encePairwiseOnDemand]: 395/400 looper letters, 33 selfloop transitions, 3 changer transitions 0/39 dead transitions. [2023-01-28 10:30:51,359 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 39 transitions, 200 flow [2023-01-28 10:30:51,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-28 10:30:51,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-28 10:30:51,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 552 transitions. [2023-01-28 10:30:51,364 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46 [2023-01-28 10:30:51,364 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 552 transitions. [2023-01-28 10:30:51,365 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 552 transitions. [2023-01-28 10:30:51,365 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:30:51,366 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 552 transitions. [2023-01-28 10:30:51,367 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 184.0) internal successors, (552), 3 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:30:51,369 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 400.0) internal successors, (1600), 4 states have internal predecessors, (1600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:30:51,370 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 400.0) internal successors, (1600), 4 states have internal predecessors, (1600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:30:51,370 INFO L175 Difference]: Start difference. First operand has 36 places, 29 transitions, 96 flow. Second operand 3 states and 552 transitions. [2023-01-28 10:30:51,370 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 39 transitions, 200 flow [2023-01-28 10:30:51,371 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 39 transitions, 194 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-01-28 10:30:51,372 INFO L231 Difference]: Finished difference. Result has 36 places, 31 transitions, 115 flow [2023-01-28 10:30:51,372 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=400, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=115, PETRI_PLACES=36, PETRI_TRANSITIONS=31} [2023-01-28 10:30:51,374 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 4 predicate places. [2023-01-28 10:30:51,374 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 31 transitions, 115 flow [2023-01-28 10:30:51,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 179.0) internal successors, (537), 3 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:30:51,374 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:30:51,374 INFO L208 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] [2023-01-28 10:30:51,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-01-28 10:30:51,375 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 10:30:51,375 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:30:51,375 INFO L85 PathProgramCache]: Analyzing trace with hash -1541808918, now seen corresponding path program 2 times [2023-01-28 10:30:51,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:30:51,375 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977824391] [2023-01-28 10:30:51,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:30:51,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:30:51,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:30:53,386 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:30:53,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:30:53,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977824391] [2023-01-28 10:30:53,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977824391] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:30:53,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1284412497] [2023-01-28 10:30:53,387 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 10:30:53,387 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:30:53,387 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:30:53,390 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) [2023-01-28 10:30:53,391 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-01-28 10:30:53,565 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-01-28 10:30:53,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:30:53,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 38 conjunts are in the unsatisfiable core [2023-01-28 10:30:53,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:30:53,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 10:30:53,873 INFO L350 Elim1Store]: Elim1 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 18 treesize of output 20 [2023-01-28 10:30:54,074 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 10:30:54,074 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-01-28 10:30:54,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1284412497] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 10:30:54,075 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-01-28 10:30:54,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [11] total 18 [2023-01-28 10:30:54,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256293008] [2023-01-28 10:30:54,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 10:30:54,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-01-28 10:30:54,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:30:54,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-01-28 10:30:54,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=338, Unknown=0, NotChecked=0, Total=380 [2023-01-28 10:30:54,077 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 400 [2023-01-28 10:30:54,079 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 31 transitions, 115 flow. Second operand has 9 states, 9 states have (on average 138.44444444444446) internal successors, (1246), 9 states have internal predecessors, (1246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:30:54,079 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:30:54,079 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 400 [2023-01-28 10:30:54,079 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:30:54,342 INFO L130 PetriNetUnfolder]: 282/446 cut-off events. [2023-01-28 10:30:54,343 INFO L131 PetriNetUnfolder]: For 162/162 co-relation queries the response was YES. [2023-01-28 10:30:54,344 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1397 conditions, 446 events. 282/446 cut-off events. For 162/162 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1383 event pairs, 57 based on Foata normal form. 5/330 useless extension candidates. Maximal degree in co-relation 1388. Up to 360 conditions per place. [2023-01-28 10:30:54,346 INFO L137 encePairwiseOnDemand]: 389/400 looper letters, 36 selfloop transitions, 8 changer transitions 22/68 dead transitions. [2023-01-28 10:30:54,346 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 68 transitions, 349 flow [2023-01-28 10:30:54,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-01-28 10:30:54,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-01-28 10:30:54,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1154 transitions. [2023-01-28 10:30:54,350 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.360625 [2023-01-28 10:30:54,350 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1154 transitions. [2023-01-28 10:30:54,350 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1154 transitions. [2023-01-28 10:30:54,351 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:30:54,351 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1154 transitions. [2023-01-28 10:30:54,353 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 144.25) internal successors, (1154), 8 states have internal predecessors, (1154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:30:54,358 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 400.0) internal successors, (3600), 9 states have internal predecessors, (3600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:30:54,359 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 400.0) internal successors, (3600), 9 states have internal predecessors, (3600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:30:54,359 INFO L175 Difference]: Start difference. First operand has 36 places, 31 transitions, 115 flow. Second operand 8 states and 1154 transitions. [2023-01-28 10:30:54,359 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 68 transitions, 349 flow [2023-01-28 10:30:54,361 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 68 transitions, 329 flow, removed 8 selfloop flow, removed 2 redundant places. [2023-01-28 10:30:54,362 INFO L231 Difference]: Finished difference. Result has 46 places, 37 transitions, 168 flow [2023-01-28 10:30:54,362 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=400, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=168, PETRI_PLACES=46, PETRI_TRANSITIONS=37} [2023-01-28 10:30:54,362 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 14 predicate places. [2023-01-28 10:30:54,362 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 37 transitions, 168 flow [2023-01-28 10:30:54,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 138.44444444444446) internal successors, (1246), 9 states have internal predecessors, (1246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:30:54,363 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:30:54,363 INFO L208 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] [2023-01-28 10:30:54,375 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-01-28 10:30:54,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:30:54,570 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 10:30:54,570 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:30:54,570 INFO L85 PathProgramCache]: Analyzing trace with hash -1719258706, now seen corresponding path program 3 times [2023-01-28 10:30:54,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:30:54,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175916971] [2023-01-28 10:30:54,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:30:54,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:30:54,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:30:56,253 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:30:56,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:30:56,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175916971] [2023-01-28 10:30:56,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175916971] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:30:56,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530060344] [2023-01-28 10:30:56,254 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 10:30:56,254 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:30:56,254 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:30:56,255 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) [2023-01-28 10:30:56,289 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-01-28 10:30:56,425 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-01-28 10:30:56,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:30:56,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 35 conjunts are in the unsatisfiable core [2023-01-28 10:30:56,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:30:56,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 10:30:56,615 INFO L350 Elim1Store]: Elim1 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 18 treesize of output 20 [2023-01-28 10:30:56,850 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 10:30:56,850 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-01-28 10:30:56,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [530060344] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 10:30:56,850 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-01-28 10:30:56,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10] total 17 [2023-01-28 10:30:56,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575720566] [2023-01-28 10:30:56,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 10:30:56,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-01-28 10:30:56,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:30:56,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-01-28 10:30:56,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=302, Unknown=0, NotChecked=0, Total=342 [2023-01-28 10:30:56,853 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 400 [2023-01-28 10:30:56,855 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 37 transitions, 168 flow. Second operand has 9 states, 9 states have (on average 138.44444444444446) internal successors, (1246), 9 states have internal predecessors, (1246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:30:56,855 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:30:56,855 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 400 [2023-01-28 10:30:56,855 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:30:57,118 INFO L130 PetriNetUnfolder]: 297/503 cut-off events. [2023-01-28 10:30:57,118 INFO L131 PetriNetUnfolder]: For 513/513 co-relation queries the response was YES. [2023-01-28 10:30:57,119 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1735 conditions, 503 events. 297/503 cut-off events. For 513/513 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1833 event pairs, 61 based on Foata normal form. 1/394 useless extension candidates. Maximal degree in co-relation 1722. Up to 380 conditions per place. [2023-01-28 10:30:57,122 INFO L137 encePairwiseOnDemand]: 388/400 looper letters, 39 selfloop transitions, 8 changer transitions 25/74 dead transitions. [2023-01-28 10:30:57,122 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 74 transitions, 439 flow [2023-01-28 10:30:57,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-01-28 10:30:57,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-01-28 10:30:57,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1153 transitions. [2023-01-28 10:30:57,126 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3603125 [2023-01-28 10:30:57,126 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1153 transitions. [2023-01-28 10:30:57,126 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1153 transitions. [2023-01-28 10:30:57,127 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:30:57,127 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1153 transitions. [2023-01-28 10:30:57,129 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 144.125) internal successors, (1153), 8 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) [2023-01-28 10:30:57,134 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 400.0) internal successors, (3600), 9 states have internal predecessors, (3600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:30:57,134 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 400.0) internal successors, (3600), 9 states have internal predecessors, (3600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:30:57,134 INFO L175 Difference]: Start difference. First operand has 46 places, 37 transitions, 168 flow. Second operand 8 states and 1153 transitions. [2023-01-28 10:30:57,134 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 74 transitions, 439 flow [2023-01-28 10:30:57,136 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 74 transitions, 421 flow, removed 5 selfloop flow, removed 3 redundant places. [2023-01-28 10:30:57,137 INFO L231 Difference]: Finished difference. Result has 53 places, 41 transitions, 219 flow [2023-01-28 10:30:57,138 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=400, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=219, PETRI_PLACES=53, PETRI_TRANSITIONS=41} [2023-01-28 10:30:57,138 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 21 predicate places. [2023-01-28 10:30:57,138 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 41 transitions, 219 flow [2023-01-28 10:30:57,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 138.44444444444446) internal successors, (1246), 9 states have internal predecessors, (1246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:30:57,139 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:30:57,139 INFO L208 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] [2023-01-28 10:30:57,148 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-01-28 10:30:57,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-01-28 10:30:57,344 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 10:30:57,345 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:30:57,345 INFO L85 PathProgramCache]: Analyzing trace with hash 1871079068, now seen corresponding path program 4 times [2023-01-28 10:30:57,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:30:57,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340066934] [2023-01-28 10:30:57,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:30:57,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:30:57,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:30:59,078 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:30:59,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:30:59,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340066934] [2023-01-28 10:30:59,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340066934] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:30:59,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [255199110] [2023-01-28 10:30:59,079 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 10:30:59,079 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:30:59,079 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:30:59,081 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) [2023-01-28 10:30:59,107 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-01-28 10:30:59,199 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 10:30:59,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:30:59,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 81 conjunts are in the unsatisfiable core [2023-01-28 10:30:59,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:30:59,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 10:30:59,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 10:30:59,254 INFO L321 Elim1Store]: treesize reduction 47, result has 36.5 percent of original size [2023-01-28 10:30:59,254 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 3 case distinctions, treesize of input 15 treesize of output 32 [2023-01-28 10:30:59,331 INFO L350 Elim1Store]: Elim1 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 15 treesize of output 11 [2023-01-28 10:30:59,418 INFO L321 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2023-01-28 10:30:59,418 INFO L350 Elim1Store]: Elim1 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 16 treesize of output 18 [2023-01-28 10:30:59,493 INFO L350 Elim1Store]: Elim1 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 [2023-01-28 10:30:59,575 INFO L350 Elim1Store]: Elim1 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 [2023-01-28 10:30:59,650 INFO L350 Elim1Store]: Elim1 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 [2023-01-28 10:31:00,118 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-01-28 10:31:00,118 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 53 [2023-01-28 10:31:00,137 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-01-28 10:31:00,138 INFO L350 Elim1Store]: Elim1 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 36 treesize of output 21 [2023-01-28 10:31:00,436 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 10:31:00,438 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:31:00,438 INFO L350 Elim1Store]: Elim1 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 12 [2023-01-28 10:31:00,484 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:31:00,485 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:31:00,615 WARN L839 $PredicateComparison]: unable to prove that (or (<= c_~n2~0 c_~q2_front~0) (< c_~q2_front~0 0) (let ((.cse0 (* c_~t~0 2)) (.cse1 (+ c_~q2~0.offset (* c_~q2_front~0 4)))) (and (forall ((v_ArrVal_262 (Array Int Int))) (< (+ .cse0 (* 2 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_262) c_~q2~0.base) .cse1)) 1) c_~s~0)) (forall ((v_ArrVal_262 (Array Int Int))) (<= c_~s~0 (+ .cse0 2 (* 2 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_262) c_~q2~0.base) .cse1)))))))) is different from false [2023-01-28 10:31:00,773 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (select (select |c_#memory_int| c_~q2~0.base) (+ (* c_~q2_back~0 4) c_~q2~0.offset)))) (or (< c_~q2_back~0 0) (<= c_~n2~0 c_~q2_back~0) (forall ((~q1_front~0 Int)) (or (< ~q1_front~0 0) (<= c_~n1~0 ~q1_front~0) (not (= (select (select |c_#memory_int| c_~q1~0.base) (+ c_~q1~0.offset (* ~q1_front~0 4))) (+ .cse0 1))))) (<= c_~n2~0 c_~q2_front~0) (let ((.cse3 (+ c_~s~0 .cse0)) (.cse1 (* c_~t~0 2)) (.cse2 (+ c_~q2~0.offset (* c_~q2_front~0 4)))) (and (forall ((v_ArrVal_262 (Array Int Int))) (< (+ .cse1 (* 2 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_262) c_~q2~0.base) .cse2))) .cse3)) (forall ((v_ArrVal_262 (Array Int Int))) (<= .cse3 (+ .cse1 (* 2 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_262) c_~q2~0.base) .cse2)) 1))))) (< c_~q2_front~0 0))) is different from false [2023-01-28 10:31:00,843 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (select |c_#memory_int| c_~q1~0.base)) (.cse1 (select (select |c_#memory_int| c_~q2~0.base) (+ (* c_~q2_back~0 4) c_~q2~0.offset)))) (or (< c_~q2_back~0 0) (forall ((~q1_back~0 Int)) (or (<= c_~n1~0 ~q1_back~0) (not (= (select .cse0 (+ (* ~q1_back~0 4) c_~q1~0.offset)) 0)) (< ~q1_back~0 0))) (<= c_~n2~0 c_~q2_back~0) (forall ((~q1_front~0 Int)) (or (< ~q1_front~0 0) (<= c_~n1~0 ~q1_front~0) (not (= (select .cse0 (+ c_~q1~0.offset (* ~q1_front~0 4))) (+ .cse1 1))))) (<= c_~n2~0 c_~q2_front~0) (let ((.cse4 (+ c_~s~0 .cse1)) (.cse2 (* c_~t~0 2)) (.cse3 (+ c_~q2~0.offset (* c_~q2_front~0 4)))) (and (forall ((v_ArrVal_262 (Array Int Int))) (< (+ .cse2 (* 2 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_262) c_~q2~0.base) .cse3))) .cse4)) (forall ((v_ArrVal_262 (Array Int Int))) (<= .cse4 (+ .cse2 (* 2 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_262) c_~q2~0.base) .cse3)) 1))))) (< c_~q2_front~0 0))) is different from false [2023-01-28 10:31:13,346 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:31:13,346 INFO L350 Elim1Store]: Elim1 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 165 treesize of output 117 [2023-01-28 10:31:13,379 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:31:13,380 INFO L350 Elim1Store]: Elim1 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 3894 treesize of output 3822 [2023-01-28 10:31:13,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 10:31:13,587 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:31:13,587 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 1172 treesize of output 992 [2023-01-28 10:31:13,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 10:31:13,645 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:31:13,645 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 956 treesize of output 884 [2023-01-28 10:31:13,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 10:31:13,702 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:31:13,703 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 848 treesize of output 806 [2023-01-28 10:31:13,745 INFO L350 Elim1Store]: Elim1 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 98 treesize of output 82 [2023-01-28 10:31:19,218 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:31:19,219 INFO L350 Elim1Store]: Elim1 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 164 treesize of output 116 [2023-01-28 10:31:19,229 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 10:31:19,244 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:31:19,244 INFO L350 Elim1Store]: Elim1 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 4442 treesize of output 4290 [2023-01-28 10:31:19,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 10:31:19,424 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:31:19,425 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 995 treesize of output 927 [2023-01-28 10:31:19,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 10:31:19,472 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:31:19,473 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 904 treesize of output 866 [2023-01-28 10:31:19,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 10:31:19,520 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:31:19,520 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 870 treesize of output 698 [2023-01-28 10:31:25,437 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:31:25,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [255199110] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:31:25,437 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:31:25,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 32 [2023-01-28 10:31:25,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976815029] [2023-01-28 10:31:25,438 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:31:25,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-01-28 10:31:25,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:31:25,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-01-28 10:31:25,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=842, Unknown=5, NotChecked=180, Total=1122 [2023-01-28 10:31:25,441 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 400 [2023-01-28 10:31:25,445 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 41 transitions, 219 flow. Second operand has 34 states, 34 states have (on average 103.73529411764706) internal successors, (3527), 34 states have internal predecessors, (3527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:31:25,445 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:31:25,445 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 400 [2023-01-28 10:31:25,445 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:31:38,636 WARN L222 SmtUtils]: Spent 13.05s on a formula simplification. DAG size of input: 177 DAG size of output: 169 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-01-28 10:32:13,884 WARN L222 SmtUtils]: Spent 22.29s on a formula simplification. DAG size of input: 290 DAG size of output: 247 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-01-28 10:32:38,022 WARN L222 SmtUtils]: Spent 23.65s on a formula simplification that was a NOOP. DAG size: 204 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-01-28 10:33:11,048 WARN L222 SmtUtils]: Spent 28.79s on a formula simplification. DAG size of input: 277 DAG size of output: 241 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-01-28 10:33:36,063 WARN L222 SmtUtils]: Spent 19.82s on a formula simplification that was a NOOP. DAG size: 185 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-01-28 10:33:38,392 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.88s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-01-28 10:33:40,398 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-01-28 10:33:42,419 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-01-28 10:34:07,302 WARN L222 SmtUtils]: Spent 18.47s on a formula simplification that was a NOOP. DAG size: 269 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-01-28 10:34:42,135 WARN L222 SmtUtils]: Spent 25.77s on a formula simplification. DAG size of input: 278 DAG size of output: 239 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-01-28 10:34:59,230 WARN L222 SmtUtils]: Spent 10.45s on a formula simplification. DAG size of input: 273 DAG size of output: 231 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-01-28 10:35:02,129 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 10:35:04,176 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 10:35:06,202 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 10:35:07,419 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 10:35:37,814 WARN L222 SmtUtils]: Spent 22.00s on a formula simplification that was a NOOP. DAG size: 263 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-01-28 10:36:15,609 WARN L222 SmtUtils]: Spent 33.57s on a formula simplification. DAG size of input: 273 DAG size of output: 262 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-01-28 10:36:41,726 WARN L222 SmtUtils]: Spent 18.69s on a formula simplification. DAG size of input: 261 DAG size of output: 223 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-01-28 10:37:26,421 WARN L222 SmtUtils]: Spent 44.27s on a formula simplification. DAG size of input: 255 DAG size of output: 244 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-01-28 10:38:24,703 WARN L222 SmtUtils]: Spent 57.72s on a formula simplification. DAG size of input: 215 DAG size of output: 203 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-01-28 10:38:27,076 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 10:38:29,083 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 10:38:31,111 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 10:38:33,113 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 10:38:35,130 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 10:38:37,374 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 10:38:39,379 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 10:38:42,760 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 10:38:46,498 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 10:38:48,501 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 10:38:52,086 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 10:38:54,910 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 10:38:56,913 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 10:38:58,974 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 10:39:00,978 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 10:39:03,099 INFO L130 PetriNetUnfolder]: 763/1324 cut-off events. [2023-01-28 10:39:03,099 INFO L131 PetriNetUnfolder]: For 2296/2298 co-relation queries the response was YES. [2023-01-28 10:39:03,103 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4959 conditions, 1324 events. 763/1324 cut-off events. For 2296/2298 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 6381 event pairs, 62 based on Foata normal form. 2/1041 useless extension candidates. Maximal degree in co-relation 4943. Up to 481 conditions per place. [2023-01-28 10:39:03,108 INFO L137 encePairwiseOnDemand]: 378/400 looper letters, 123 selfloop transitions, 62 changer transitions 96/283 dead transitions. [2023-01-28 10:39:03,108 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 283 transitions, 1843 flow [2023-01-28 10:39:03,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-01-28 10:39:03,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2023-01-28 10:39:03,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 4360 transitions. [2023-01-28 10:39:03,121 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2725 [2023-01-28 10:39:03,121 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 4360 transitions. [2023-01-28 10:39:03,121 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 4360 transitions. [2023-01-28 10:39:03,123 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:39:03,123 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 4360 transitions. [2023-01-28 10:39:03,132 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 109.0) internal successors, (4360), 40 states have internal predecessors, (4360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:39:03,149 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 400.0) internal successors, (16400), 41 states have internal predecessors, (16400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:39:03,152 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 400.0) internal successors, (16400), 41 states have internal predecessors, (16400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:39:03,153 INFO L175 Difference]: Start difference. First operand has 53 places, 41 transitions, 219 flow. Second operand 40 states and 4360 transitions. [2023-01-28 10:39:03,153 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 283 transitions, 1843 flow [2023-01-28 10:39:03,160 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 283 transitions, 1731 flow, removed 48 selfloop flow, removed 5 redundant places. [2023-01-28 10:39:03,164 INFO L231 Difference]: Finished difference. Result has 108 places, 97 transitions, 818 flow [2023-01-28 10:39:03,165 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=400, PETRI_DIFFERENCE_MINUEND_FLOW=198, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=818, PETRI_PLACES=108, PETRI_TRANSITIONS=97} [2023-01-28 10:39:03,165 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 76 predicate places. [2023-01-28 10:39:03,165 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 97 transitions, 818 flow [2023-01-28 10:39:03,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 103.73529411764706) internal successors, (3527), 34 states have internal predecessors, (3527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:39:03,167 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:39:03,167 INFO L208 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] [2023-01-28 10:39:03,175 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-01-28 10:39:03,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:39:03,373 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 10:39:03,373 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:39:03,373 INFO L85 PathProgramCache]: Analyzing trace with hash 1105249356, now seen corresponding path program 5 times [2023-01-28 10:39:03,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:39:03,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521996096] [2023-01-28 10:39:03,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:39:03,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:39:03,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:39:04,997 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:39:04,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:39:04,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521996096] [2023-01-28 10:39:04,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521996096] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:39:04,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1949607740] [2023-01-28 10:39:04,998 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 10:39:04,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:39:04,998 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:39:05,001 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) [2023-01-28 10:39:05,007 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-01-28 10:39:05,115 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 10:39:05,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:39:05,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 61 conjunts are in the unsatisfiable core [2023-01-28 10:39:05,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:39:05,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 10:39:05,552 INFO L350 Elim1Store]: Elim1 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 16 treesize of output 18 [2023-01-28 10:39:05,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 10:39:05,621 INFO L350 Elim1Store]: Elim1 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 16 treesize of output 18 [2023-01-28 10:39:05,988 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 10:39:05,993 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-01-28 10:39:05,994 INFO L350 Elim1Store]: Elim1 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 30 treesize of output 16 [2023-01-28 10:39:06,034 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:39:06,034 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:39:06,521 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:39:06,521 INFO L350 Elim1Store]: Elim1 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 1102 treesize of output 1034 [2023-01-28 10:39:06,580 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:39:06,581 INFO L350 Elim1Store]: Elim1 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 554 treesize of output 462 [2023-01-28 10:39:06,613 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:39:06,613 INFO L350 Elim1Store]: Elim1 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 358 treesize of output 332 [2023-01-28 10:39:24,496 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:39:24,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1949607740] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:39:24,497 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:39:24,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 31 [2023-01-28 10:39:24,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496856467] [2023-01-28 10:39:24,497 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:39:24,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-01-28 10:39:24,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:39:24,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-01-28 10:39:24,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=929, Unknown=12, NotChecked=0, Total=1056 [2023-01-28 10:39:24,501 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 400 [2023-01-28 10:39:24,504 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 97 transitions, 818 flow. Second operand has 33 states, 33 states have (on average 110.93939393939394) internal successors, (3661), 33 states have internal predecessors, (3661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:39:24,504 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:39:24,504 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 400 [2023-01-28 10:39:24,504 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:39:30,607 INFO L130 PetriNetUnfolder]: 1720/2756 cut-off events. [2023-01-28 10:39:30,607 INFO L131 PetriNetUnfolder]: For 16510/16512 co-relation queries the response was YES. [2023-01-28 10:39:30,614 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15395 conditions, 2756 events. 1720/2756 cut-off events. For 16510/16512 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 14028 event pairs, 103 based on Foata normal form. 4/2275 useless extension candidates. Maximal degree in co-relation 15359. Up to 1021 conditions per place. [2023-01-28 10:39:30,629 INFO L137 encePairwiseOnDemand]: 385/400 looper letters, 217 selfloop transitions, 172 changer transitions 52/443 dead transitions. [2023-01-28 10:39:30,629 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 443 transitions, 5019 flow [2023-01-28 10:39:30,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-01-28 10:39:30,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2023-01-28 10:39:30,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 4912 transitions. [2023-01-28 10:39:30,641 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2923809523809524 [2023-01-28 10:39:30,641 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 4912 transitions. [2023-01-28 10:39:30,641 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 4912 transitions. [2023-01-28 10:39:30,643 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:39:30,644 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 4912 transitions. [2023-01-28 10:39:30,652 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 43 states, 42 states have (on average 116.95238095238095) internal successors, (4912), 42 states have internal predecessors, (4912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:39:30,668 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 43 states, 43 states have (on average 400.0) internal successors, (17200), 43 states have internal predecessors, (17200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:39:30,671 INFO L81 ComplementDD]: Finished complementDD. Result has 43 states, 43 states have (on average 400.0) internal successors, (17200), 43 states have internal predecessors, (17200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:39:30,671 INFO L175 Difference]: Start difference. First operand has 108 places, 97 transitions, 818 flow. Second operand 42 states and 4912 transitions. [2023-01-28 10:39:30,671 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 443 transitions, 5019 flow [2023-01-28 10:39:30,711 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 443 transitions, 3816 flow, removed 576 selfloop flow, removed 11 redundant places. [2023-01-28 10:39:30,752 INFO L231 Difference]: Finished difference. Result has 140 places, 245 transitions, 2512 flow [2023-01-28 10:39:30,753 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=400, PETRI_DIFFERENCE_MINUEND_FLOW=595, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=2512, PETRI_PLACES=140, PETRI_TRANSITIONS=245} [2023-01-28 10:39:30,753 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 108 predicate places. [2023-01-28 10:39:30,753 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 245 transitions, 2512 flow [2023-01-28 10:39:30,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 110.93939393939394) internal successors, (3661), 33 states have internal predecessors, (3661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:39:30,755 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:39:30,755 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:39:30,763 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-01-28 10:39:30,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:39:30,955 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 10:39:30,956 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:39:30,956 INFO L85 PathProgramCache]: Analyzing trace with hash 1562981495, now seen corresponding path program 6 times [2023-01-28 10:39:30,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:39:30,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38512384] [2023-01-28 10:39:30,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:39:30,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:39:31,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:39:33,852 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:39:33,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:39:33,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38512384] [2023-01-28 10:39:33,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38512384] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:39:33,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [142259890] [2023-01-28 10:39:33,853 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-28 10:39:33,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:39:33,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:39:33,864 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) [2023-01-28 10:39:33,866 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-01-28 10:39:33,986 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2023-01-28 10:39:33,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:39:33,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 39 conjunts are in the unsatisfiable core [2023-01-28 10:39:33,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:39:34,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 10:39:34,279 INFO L321 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2023-01-28 10:39:34,279 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 40 [2023-01-28 10:39:34,361 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-28 10:39:34,362 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-01-28 10:39:34,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [142259890] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 10:39:34,362 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-01-28 10:39:34,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [12] total 20 [2023-01-28 10:39:34,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712487261] [2023-01-28 10:39:34,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 10:39:34,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-01-28 10:39:34,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:39:34,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-01-28 10:39:34,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=413, Unknown=0, NotChecked=0, Total=462 [2023-01-28 10:39:34,363 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 131 out of 400 [2023-01-28 10:39:34,364 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 245 transitions, 2512 flow. Second operand has 10 states, 10 states have (on average 133.2) internal successors, (1332), 10 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:39:34,364 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:39:34,365 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 131 of 400 [2023-01-28 10:39:34,365 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:39:34,991 INFO L130 PetriNetUnfolder]: 1634/2596 cut-off events. [2023-01-28 10:39:34,992 INFO L131 PetriNetUnfolder]: For 19871/19881 co-relation queries the response was YES. [2023-01-28 10:39:35,001 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15254 conditions, 2596 events. 1634/2596 cut-off events. For 19871/19881 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 12811 event pairs, 223 based on Foata normal form. 1/2368 useless extension candidates. Maximal degree in co-relation 15210. Up to 2376 conditions per place. [2023-01-28 10:39:35,017 INFO L137 encePairwiseOnDemand]: 390/400 looper letters, 235 selfloop transitions, 8 changer transitions 36/281 dead transitions. [2023-01-28 10:39:35,018 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 281 transitions, 3288 flow [2023-01-28 10:39:35,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-01-28 10:39:35,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-01-28 10:39:35,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1117 transitions. [2023-01-28 10:39:35,020 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3490625 [2023-01-28 10:39:35,020 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1117 transitions. [2023-01-28 10:39:35,020 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1117 transitions. [2023-01-28 10:39:35,020 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:39:35,021 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1117 transitions. [2023-01-28 10:39:35,023 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 139.625) internal successors, (1117), 8 states have internal predecessors, (1117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:39:35,026 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 400.0) internal successors, (3600), 9 states have internal predecessors, (3600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:39:35,026 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 400.0) internal successors, (3600), 9 states have internal predecessors, (3600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:39:35,026 INFO L175 Difference]: Start difference. First operand has 140 places, 245 transitions, 2512 flow. Second operand 8 states and 1117 transitions. [2023-01-28 10:39:35,026 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 281 transitions, 3288 flow [2023-01-28 10:39:35,120 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 281 transitions, 2704 flow, removed 271 selfloop flow, removed 13 redundant places. [2023-01-28 10:39:35,123 INFO L231 Difference]: Finished difference. Result has 130 places, 239 transitions, 1886 flow [2023-01-28 10:39:35,123 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=400, PETRI_DIFFERENCE_MINUEND_FLOW=1938, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1886, PETRI_PLACES=130, PETRI_TRANSITIONS=239} [2023-01-28 10:39:35,124 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 98 predicate places. [2023-01-28 10:39:35,124 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 239 transitions, 1886 flow [2023-01-28 10:39:35,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 133.2) internal successors, (1332), 10 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:39:35,125 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:39:35,125 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:39:35,130 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-01-28 10:39:35,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:39:35,326 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 10:39:35,326 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:39:35,327 INFO L85 PathProgramCache]: Analyzing trace with hash 1215612886, now seen corresponding path program 7 times [2023-01-28 10:39:35,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:39:35,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276208168] [2023-01-28 10:39:35,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:39:35,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:39:35,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:39:37,216 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:39:37,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:39:37,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276208168] [2023-01-28 10:39:37,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276208168] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:39:37,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [319513610] [2023-01-28 10:39:37,216 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-28 10:39:37,216 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:39:37,216 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:39:37,217 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) [2023-01-28 10:39:37,220 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-01-28 10:39:37,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:39:37,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 68 conjunts are in the unsatisfiable core [2023-01-28 10:39:37,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:39:37,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 10:39:37,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 10:39:37,386 INFO L321 Elim1Store]: treesize reduction 47, result has 36.5 percent of original size [2023-01-28 10:39:37,387 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 3 case distinctions, treesize of input 15 treesize of output 32 [2023-01-28 10:39:37,447 INFO L350 Elim1Store]: Elim1 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 15 treesize of output 11 [2023-01-28 10:39:37,521 INFO L321 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2023-01-28 10:39:37,521 INFO L350 Elim1Store]: Elim1 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 16 treesize of output 18 [2023-01-28 10:39:37,573 INFO L350 Elim1Store]: Elim1 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 [2023-01-28 10:39:37,618 INFO L350 Elim1Store]: Elim1 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 [2023-01-28 10:39:37,642 INFO L350 Elim1Store]: Elim1 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 [2023-01-28 10:39:37,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 10:39:37,776 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-01-28 10:39:37,985 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-01-28 10:39:37,985 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 40 [2023-01-28 10:39:37,992 INFO L350 Elim1Store]: Elim1 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 9 treesize of output 3 [2023-01-28 10:39:38,075 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 10:39:38,076 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:39:38,118 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_440 (Array Int Int))) (= c_~s~0 (+ (* c_~t~0 2) (* 2 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_440) c_~q2~0.base) (+ c_~q2~0.offset (* c_~q2_front~0 4)))) 2))) is different from false [2023-01-28 10:39:38,226 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_439 (Array Int Int)) (~q2~0.offset Int) (v_ArrVal_440 (Array Int Int))) (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_439))) (let ((.cse0 (select (select .cse1 c_~q1~0.base) (+ (* c_~q1_front~0 4) c_~q1~0.offset)))) (or (= (+ c_~s~0 .cse0) (+ (* c_~t~0 2) 2 (* (select (select (store .cse1 |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_440) c_~q2~0.base) (+ ~q2~0.offset (* c_~q2_front~0 4))) 2))) (not (= .cse0 (+ (select (select .cse1 c_~q2~0.base) (+ ~q2~0.offset (* c_~q2_back~0 4))) 1))))))) is different from false [2023-01-28 10:39:38,668 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:39:38,668 INFO L350 Elim1Store]: Elim1 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 168 treesize of output 120 [2023-01-28 10:39:38,691 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:39:38,693 INFO L350 Elim1Store]: Elim1 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 12518 treesize of output 12126 [2023-01-28 10:39:39,000 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:39:39,000 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 3044 treesize of output 2950 [2023-01-28 10:39:39,033 INFO L350 Elim1Store]: Elim1 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 2022 treesize of output 1830 [2023-01-28 10:39:39,110 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:39:39,110 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 2678 treesize of output 2506 [2023-01-28 10:39:39,165 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:39:39,166 INFO L350 Elim1Store]: Elim1 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 2380 treesize of output 1940 [2023-01-28 10:40:14,951 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 2 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 10:40:14,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [319513610] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:40:14,952 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:40:14,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 33 [2023-01-28 10:40:14,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156736109] [2023-01-28 10:40:14,952 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:40:14,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-01-28 10:40:14,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:40:14,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-01-28 10:40:14,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=961, Unknown=6, NotChecked=126, Total=1190 [2023-01-28 10:40:14,955 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 400 [2023-01-28 10:40:14,957 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 239 transitions, 1886 flow. Second operand has 35 states, 35 states have (on average 103.77142857142857) internal successors, (3632), 35 states have internal predecessors, (3632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:40:14,957 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:40:14,957 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 400 [2023-01-28 10:40:14,957 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:40:21,497 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (forall ((v_ArrVal_439 (Array Int Int)) (~q2~0.offset Int) (v_ArrVal_440 (Array Int Int))) (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_439))) (let ((.cse1 (select (select .cse2 c_~q1~0.base) (+ (* c_~q1_front~0 4) c_~q1~0.offset)))) (or (= (+ c_~s~0 .cse1) (+ (* c_~t~0 2) 2 (* (select (select (store .cse2 |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_440) c_~q2~0.base) (+ ~q2~0.offset (* c_~q2_front~0 4))) 2))) (not (= .cse1 (+ (select (select .cse2 c_~q2~0.base) (+ ~q2~0.offset (* c_~q2_back~0 4))) 1))))))))) (and (or (<= c_~n1~0 c_~q1_back~0) (< c_~q1_back~0 0) (not (= (select (select |c_#memory_int| c_~q1~0.base) (+ (* c_~q1_back~0 4) c_~q1~0.offset)) 0)) .cse0) .cse0)) is different from false [2023-01-28 10:40:29,381 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 10:40:31,593 INFO L130 PetriNetUnfolder]: 1976/3279 cut-off events. [2023-01-28 10:40:31,593 INFO L131 PetriNetUnfolder]: For 23009/23011 co-relation queries the response was YES. [2023-01-28 10:40:31,600 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17239 conditions, 3279 events. 1976/3279 cut-off events. For 23009/23011 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 18246 event pairs, 274 based on Foata normal form. 41/3026 useless extension candidates. Maximal degree in co-relation 17198. Up to 2530 conditions per place. [2023-01-28 10:40:31,612 INFO L137 encePairwiseOnDemand]: 378/400 looper letters, 280 selfloop transitions, 138 changer transitions 94/514 dead transitions. [2023-01-28 10:40:31,612 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 514 transitions, 5166 flow [2023-01-28 10:40:31,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2023-01-28 10:40:31,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2023-01-28 10:40:31,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 4982 transitions. [2023-01-28 10:40:31,618 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2707608695652174 [2023-01-28 10:40:31,618 INFO L72 ComplementDD]: Start complementDD. Operand 46 states and 4982 transitions. [2023-01-28 10:40:31,618 INFO L73 IsDeterministic]: Start isDeterministic. Operand 46 states and 4982 transitions. [2023-01-28 10:40:31,622 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:40:31,622 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 46 states and 4982 transitions. [2023-01-28 10:40:31,628 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 47 states, 46 states have (on average 108.30434782608695) internal successors, (4982), 46 states have internal predecessors, (4982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:40:31,644 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 47 states, 47 states have (on average 400.0) internal successors, (18800), 47 states have internal predecessors, (18800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:40:31,646 INFO L81 ComplementDD]: Finished complementDD. Result has 47 states, 47 states have (on average 400.0) internal successors, (18800), 47 states have internal predecessors, (18800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:40:31,647 INFO L175 Difference]: Start difference. First operand has 130 places, 239 transitions, 1886 flow. Second operand 46 states and 4982 transitions. [2023-01-28 10:40:31,647 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 514 transitions, 5166 flow [2023-01-28 10:40:31,727 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 514 transitions, 4970 flow, removed 79 selfloop flow, removed 7 redundant places. [2023-01-28 10:40:31,736 INFO L231 Difference]: Finished difference. Result has 189 places, 333 transitions, 3354 flow [2023-01-28 10:40:31,736 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=400, PETRI_DIFFERENCE_MINUEND_FLOW=1832, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=3354, PETRI_PLACES=189, PETRI_TRANSITIONS=333} [2023-01-28 10:40:31,736 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 157 predicate places. [2023-01-28 10:40:31,737 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 333 transitions, 3354 flow [2023-01-28 10:40:31,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 103.77142857142857) internal successors, (3632), 35 states have internal predecessors, (3632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:40:31,737 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:40:31,737 INFO L208 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] [2023-01-28 10:40:31,742 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-01-28 10:40:31,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:40:31,938 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 10:40:31,938 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:40:31,938 INFO L85 PathProgramCache]: Analyzing trace with hash 1668641668, now seen corresponding path program 1 times [2023-01-28 10:40:31,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:40:31,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411307995] [2023-01-28 10:40:31,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:40:31,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:40:31,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:40:32,052 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 10:40:32,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:40:32,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411307995] [2023-01-28 10:40:32,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411307995] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:40:32,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291542633] [2023-01-28 10:40:32,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:40:32,053 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:40:32,053 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:40:32,057 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) [2023-01-28 10:40:32,061 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-01-28 10:40:32,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:40:32,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 8 conjunts are in the unsatisfiable core [2023-01-28 10:40:32,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:40:32,249 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 10:40:32,250 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:40:32,330 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 10:40:32,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [291542633] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:40:32,330 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:40:32,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-01-28 10:40:32,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277313465] [2023-01-28 10:40:32,330 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:40:32,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-01-28 10:40:32,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:40:32,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-01-28 10:40:32,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-01-28 10:40:32,332 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 149 out of 400 [2023-01-28 10:40:32,333 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 333 transitions, 3354 flow. Second operand has 12 states, 12 states have (on average 152.66666666666666) internal successors, (1832), 12 states have internal predecessors, (1832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:40:32,333 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:40:32,333 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 149 of 400 [2023-01-28 10:40:32,333 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:40:32,758 INFO L130 PetriNetUnfolder]: 1036/1769 cut-off events. [2023-01-28 10:40:32,758 INFO L131 PetriNetUnfolder]: For 22371/22495 co-relation queries the response was YES. [2023-01-28 10:40:32,767 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11436 conditions, 1769 events. 1036/1769 cut-off events. For 22371/22495 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 8897 event pairs, 244 based on Foata normal form. 212/1826 useless extension candidates. Maximal degree in co-relation 11372. Up to 1016 conditions per place. [2023-01-28 10:40:32,774 INFO L137 encePairwiseOnDemand]: 395/400 looper letters, 130 selfloop transitions, 6 changer transitions 69/208 dead transitions. [2023-01-28 10:40:32,774 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 208 transitions, 2500 flow [2023-01-28 10:40:32,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-28 10:40:32,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-28 10:40:32,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 949 transitions. [2023-01-28 10:40:32,776 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3954166666666667 [2023-01-28 10:40:32,776 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 949 transitions. [2023-01-28 10:40:32,776 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 949 transitions. [2023-01-28 10:40:32,776 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:40:32,776 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 949 transitions. [2023-01-28 10:40:32,777 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 158.16666666666666) internal successors, (949), 6 states have internal predecessors, (949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:40:32,779 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 400.0) internal successors, (2800), 7 states have internal predecessors, (2800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:40:32,779 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 400.0) internal successors, (2800), 7 states have internal predecessors, (2800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:40:32,779 INFO L175 Difference]: Start difference. First operand has 189 places, 333 transitions, 3354 flow. Second operand 6 states and 949 transitions. [2023-01-28 10:40:32,779 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 208 transitions, 2500 flow [2023-01-28 10:40:32,835 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 208 transitions, 2066 flow, removed 189 selfloop flow, removed 26 redundant places. [2023-01-28 10:40:32,837 INFO L231 Difference]: Finished difference. Result has 135 places, 116 transitions, 990 flow [2023-01-28 10:40:32,838 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=400, PETRI_DIFFERENCE_MINUEND_FLOW=1420, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=990, PETRI_PLACES=135, PETRI_TRANSITIONS=116} [2023-01-28 10:40:32,838 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 103 predicate places. [2023-01-28 10:40:32,838 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 116 transitions, 990 flow [2023-01-28 10:40:32,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 152.66666666666666) internal successors, (1832), 12 states have internal predecessors, (1832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:40:32,839 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:40:32,839 INFO L208 CegarLoopForPetriNet]: trace histogram [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] [2023-01-28 10:40:32,847 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-01-28 10:40:33,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:40:33,045 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 10:40:33,045 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:40:33,045 INFO L85 PathProgramCache]: Analyzing trace with hash -987712730, now seen corresponding path program 1 times [2023-01-28 10:40:33,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:40:33,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54210997] [2023-01-28 10:40:33,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:40:33,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:40:33,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:40:33,139 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-28 10:40:33,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:40:33,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54210997] [2023-01-28 10:40:33,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54210997] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 10:40:33,139 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 10:40:33,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-01-28 10:40:33,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559434751] [2023-01-28 10:40:33,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 10:40:33,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-01-28 10:40:33,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:40:33,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-01-28 10:40:33,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-01-28 10:40:33,141 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 400 [2023-01-28 10:40:33,142 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 116 transitions, 990 flow. Second operand has 4 states, 4 states have (on average 177.5) internal successors, (710), 4 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) [2023-01-28 10:40:33,142 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:40:33,142 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 400 [2023-01-28 10:40:33,142 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:40:33,452 INFO L130 PetriNetUnfolder]: 1397/2284 cut-off events. [2023-01-28 10:40:33,452 INFO L131 PetriNetUnfolder]: For 11530/11579 co-relation queries the response was YES. [2023-01-28 10:40:33,458 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12055 conditions, 2284 events. 1397/2284 cut-off events. For 11530/11579 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 11246 event pairs, 171 based on Foata normal form. 128/2091 useless extension candidates. Maximal degree in co-relation 12008. Up to 894 conditions per place. [2023-01-28 10:40:33,490 INFO L137 encePairwiseOnDemand]: 395/400 looper letters, 130 selfloop transitions, 24 changer transitions 9/166 dead transitions. [2023-01-28 10:40:33,490 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 166 transitions, 1716 flow [2023-01-28 10:40:33,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-01-28 10:40:33,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-01-28 10:40:33,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 744 transitions. [2023-01-28 10:40:33,494 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.465 [2023-01-28 10:40:33,494 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 744 transitions. [2023-01-28 10:40:33,494 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 744 transitions. [2023-01-28 10:40:33,494 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:40:33,494 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 744 transitions. [2023-01-28 10:40:33,495 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 186.0) internal successors, (744), 4 states have internal predecessors, (744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:40:33,496 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 400.0) internal successors, (2000), 5 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) [2023-01-28 10:40:33,496 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 400.0) internal successors, (2000), 5 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) [2023-01-28 10:40:33,497 INFO L175 Difference]: Start difference. First operand has 135 places, 116 transitions, 990 flow. Second operand 4 states and 744 transitions. [2023-01-28 10:40:33,497 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 166 transitions, 1716 flow [2023-01-28 10:40:33,524 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 166 transitions, 1593 flow, removed 54 selfloop flow, removed 14 redundant places. [2023-01-28 10:40:33,526 INFO L231 Difference]: Finished difference. Result has 110 places, 119 transitions, 1056 flow [2023-01-28 10:40:33,526 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=400, PETRI_DIFFERENCE_MINUEND_FLOW=909, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1056, PETRI_PLACES=110, PETRI_TRANSITIONS=119} [2023-01-28 10:40:33,527 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 78 predicate places. [2023-01-28 10:40:33,527 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 119 transitions, 1056 flow [2023-01-28 10:40:33,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 177.5) internal successors, (710), 4 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) [2023-01-28 10:40:33,527 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:40:33,527 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:40:33,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-01-28 10:40:33,527 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 10:40:33,528 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:40:33,528 INFO L85 PathProgramCache]: Analyzing trace with hash -1130956623, now seen corresponding path program 8 times [2023-01-28 10:40:33,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:40:33,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491407154] [2023-01-28 10:40:33,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:40:33,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:40:33,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:40:35,836 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:40:35,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:40:35,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491407154] [2023-01-28 10:40:35,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491407154] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:40:35,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559025297] [2023-01-28 10:40:35,837 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 10:40:35,837 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:40:35,837 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:40:35,838 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) [2023-01-28 10:40:35,839 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-01-28 10:40:35,959 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-01-28 10:40:35,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:40:35,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 37 conjunts are in the unsatisfiable core [2023-01-28 10:40:35,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:40:36,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 10:40:36,148 INFO L350 Elim1Store]: Elim1 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 18 treesize of output 20 [2023-01-28 10:40:36,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 10:40:36,202 INFO L350 Elim1Store]: Elim1 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 18 treesize of output 20 [2023-01-28 10:40:36,397 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 10:40:36,397 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-01-28 10:40:36,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1559025297] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 10:40:36,397 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-01-28 10:40:36,397 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [12] total 20 [2023-01-28 10:40:36,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554474218] [2023-01-28 10:40:36,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 10:40:36,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-01-28 10:40:36,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:40:36,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-01-28 10:40:36,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2023-01-28 10:40:36,399 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 400 [2023-01-28 10:40:36,400 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 119 transitions, 1056 flow. Second operand has 10 states, 10 states have (on average 135.2) internal successors, (1352), 10 states have internal predecessors, (1352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:40:36,400 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:40:36,400 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 400 [2023-01-28 10:40:36,400 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:40:36,784 INFO L130 PetriNetUnfolder]: 1234/2031 cut-off events. [2023-01-28 10:40:36,784 INFO L131 PetriNetUnfolder]: For 11053/11053 co-relation queries the response was YES. [2023-01-28 10:40:36,789 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11201 conditions, 2031 events. 1234/2031 cut-off events. For 11053/11053 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 9580 event pairs, 141 based on Foata normal form. 27/1755 useless extension candidates. Maximal degree in co-relation 11162. Up to 1691 conditions per place. [2023-01-28 10:40:36,797 INFO L137 encePairwiseOnDemand]: 389/400 looper letters, 92 selfloop transitions, 12 changer transitions 46/152 dead transitions. [2023-01-28 10:40:36,797 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 152 transitions, 1617 flow [2023-01-28 10:40:36,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-01-28 10:40:36,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-01-28 10:40:36,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1129 transitions. [2023-01-28 10:40:36,802 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3528125 [2023-01-28 10:40:36,802 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1129 transitions. [2023-01-28 10:40:36,802 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1129 transitions. [2023-01-28 10:40:36,802 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:40:36,803 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1129 transitions. [2023-01-28 10:40:36,804 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 141.125) internal successors, (1129), 8 states have internal predecessors, (1129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:40:36,806 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 400.0) internal successors, (3600), 9 states have internal predecessors, (3600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:40:36,806 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 400.0) internal successors, (3600), 9 states have internal predecessors, (3600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:40:36,806 INFO L175 Difference]: Start difference. First operand has 110 places, 119 transitions, 1056 flow. Second operand 8 states and 1129 transitions. [2023-01-28 10:40:36,806 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 152 transitions, 1617 flow [2023-01-28 10:40:36,822 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 152 transitions, 1579 flow, removed 17 selfloop flow, removed 5 redundant places. [2023-01-28 10:40:36,824 INFO L231 Difference]: Finished difference. Result has 111 places, 98 transitions, 842 flow [2023-01-28 10:40:36,824 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=400, PETRI_DIFFERENCE_MINUEND_FLOW=996, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=842, PETRI_PLACES=111, PETRI_TRANSITIONS=98} [2023-01-28 10:40:36,825 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 79 predicate places. [2023-01-28 10:40:36,825 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 98 transitions, 842 flow [2023-01-28 10:40:36,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 135.2) internal successors, (1352), 10 states have internal predecessors, (1352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:40:36,826 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:40:36,826 INFO L208 CegarLoopForPetriNet]: trace histogram [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] [2023-01-28 10:40:36,833 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-01-28 10:40:37,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-01-28 10:40:37,031 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 10:40:37,032 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:40:37,032 INFO L85 PathProgramCache]: Analyzing trace with hash 955094469, now seen corresponding path program 2 times [2023-01-28 10:40:37,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:40:37,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35034875] [2023-01-28 10:40:37,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:40:37,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:40:37,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:40:37,655 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 10:40:37,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:40:37,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35034875] [2023-01-28 10:40:37,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35034875] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:40:37,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [973823432] [2023-01-28 10:40:37,656 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 10:40:37,656 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:40:37,656 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:40:37,661 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) [2023-01-28 10:40:37,664 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-01-28 10:40:37,850 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 10:40:37,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:40:37,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 35 conjunts are in the unsatisfiable core [2023-01-28 10:40:37,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:40:37,866 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-01-28 10:40:37,866 INFO L350 Elim1Store]: Elim1 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 23 treesize of output 19 [2023-01-28 10:40:38,027 INFO L350 Elim1Store]: Elim1 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 11 treesize of output 7 [2023-01-28 10:40:38,060 INFO L350 Elim1Store]: Elim1 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 [2023-01-28 10:40:38,185 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 10:40:38,186 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:40:38,368 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:40:38,369 INFO L350 Elim1Store]: Elim1 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 38 [2023-01-28 10:40:38,375 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-01-28 10:40:38,375 INFO L350 Elim1Store]: Elim1 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 62 treesize of output 49 [2023-01-28 10:40:38,381 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-01-28 10:40:38,382 INFO L350 Elim1Store]: Elim1 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 38 treesize of output 26 [2023-01-28 10:40:38,550 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 10:40:38,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [973823432] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:40:38,550 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:40:38,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 10] total 27 [2023-01-28 10:40:38,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497763961] [2023-01-28 10:40:38,550 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:40:38,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-01-28 10:40:38,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:40:38,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-01-28 10:40:38,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=605, Unknown=1, NotChecked=0, Total=756 [2023-01-28 10:40:38,553 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 400 [2023-01-28 10:40:38,555 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 98 transitions, 842 flow. Second operand has 28 states, 28 states have (on average 120.96428571428571) internal successors, (3387), 28 states have internal predecessors, (3387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:40:38,555 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:40:38,555 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 400 [2023-01-28 10:40:38,555 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:40:40,900 INFO L130 PetriNetUnfolder]: 6541/9645 cut-off events. [2023-01-28 10:40:40,900 INFO L131 PetriNetUnfolder]: For 49374/49374 co-relation queries the response was YES. [2023-01-28 10:40:40,922 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52851 conditions, 9645 events. 6541/9645 cut-off events. For 49374/49374 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 52169 event pairs, 287 based on Foata normal form. 556/8250 useless extension candidates. Maximal degree in co-relation 52811. Up to 3136 conditions per place. [2023-01-28 10:40:40,965 INFO L137 encePairwiseOnDemand]: 390/400 looper letters, 449 selfloop transitions, 177 changer transitions 12/640 dead transitions. [2023-01-28 10:40:40,965 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 640 transitions, 7050 flow [2023-01-28 10:40:40,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-01-28 10:40:40,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-01-28 10:40:40,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 3100 transitions. [2023-01-28 10:40:40,969 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3229166666666667 [2023-01-28 10:40:40,969 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 3100 transitions. [2023-01-28 10:40:40,969 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 3100 transitions. [2023-01-28 10:40:40,970 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:40:40,970 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 3100 transitions. [2023-01-28 10:40:40,973 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 129.16666666666666) internal successors, (3100), 24 states have internal predecessors, (3100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:40:40,980 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 400.0) internal successors, (10000), 25 states have internal predecessors, (10000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:40:40,980 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 400.0) internal successors, (10000), 25 states have internal predecessors, (10000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:40:40,981 INFO L175 Difference]: Start difference. First operand has 111 places, 98 transitions, 842 flow. Second operand 24 states and 3100 transitions. [2023-01-28 10:40:40,981 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 640 transitions, 7050 flow [2023-01-28 10:40:41,095 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 640 transitions, 6609 flow, removed 194 selfloop flow, removed 15 redundant places. [2023-01-28 10:40:41,101 INFO L231 Difference]: Finished difference. Result has 119 places, 285 transitions, 3215 flow [2023-01-28 10:40:41,101 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=400, PETRI_DIFFERENCE_MINUEND_FLOW=749, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=3215, PETRI_PLACES=119, PETRI_TRANSITIONS=285} [2023-01-28 10:40:41,101 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 87 predicate places. [2023-01-28 10:40:41,101 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 285 transitions, 3215 flow [2023-01-28 10:40:41,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 120.96428571428571) internal successors, (3387), 28 states have internal predecessors, (3387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:40:41,102 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:40:41,102 INFO L208 CegarLoopForPetriNet]: trace histogram [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] [2023-01-28 10:40:41,111 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-01-28 10:40:41,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-01-28 10:40:41,311 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 10:40:41,312 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:40:41,312 INFO L85 PathProgramCache]: Analyzing trace with hash 144872851, now seen corresponding path program 3 times [2023-01-28 10:40:41,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:40:41,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284240280] [2023-01-28 10:40:41,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:40:41,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:40:41,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:40:41,768 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 10:40:41,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:40:41,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284240280] [2023-01-28 10:40:41,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284240280] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:40:41,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1444028679] [2023-01-28 10:40:41,768 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 10:40:41,768 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:40:41,768 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:40:41,770 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) [2023-01-28 10:40:41,773 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-01-28 10:40:41,931 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-01-28 10:40:41,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:40:41,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 22 conjunts are in the unsatisfiable core [2023-01-28 10:40:41,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:40:42,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 10:40:42,019 INFO L350 Elim1Store]: Elim1 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 18 treesize of output 20 [2023-01-28 10:40:42,060 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-28 10:40:42,060 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:40:42,143 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:40:42,143 INFO L350 Elim1Store]: Elim1 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 [2023-01-28 10:40:42,150 INFO L350 Elim1Store]: Elim1 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 9 treesize of output 3 [2023-01-28 10:40:42,195 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-28 10:40:42,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1444028679] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:40:42,195 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:40:42,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6, 6] total 19 [2023-01-28 10:40:42,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047580235] [2023-01-28 10:40:42,196 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:40:42,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-01-28 10:40:42,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:40:42,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-01-28 10:40:42,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=324, Unknown=2, NotChecked=0, Total=380 [2023-01-28 10:40:42,198 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 400 [2023-01-28 10:40:42,199 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 285 transitions, 3215 flow. Second operand has 20 states, 20 states have (on average 127.8) internal successors, (2556), 20 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) [2023-01-28 10:40:42,199 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:40:42,199 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 400 [2023-01-28 10:40:42,199 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:40:43,862 INFO L130 PetriNetUnfolder]: 7135/10552 cut-off events. [2023-01-28 10:40:43,862 INFO L131 PetriNetUnfolder]: For 101364/101364 co-relation queries the response was YES. [2023-01-28 10:40:43,890 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70484 conditions, 10552 events. 7135/10552 cut-off events. For 101364/101364 co-relation queries the response was YES. Maximal size of possible extension queue 441. Compared 58290 event pairs, 399 based on Foata normal form. 44/9376 useless extension candidates. Maximal degree in co-relation 70440. Up to 5265 conditions per place. [2023-01-28 10:40:43,928 INFO L137 encePairwiseOnDemand]: 391/400 looper letters, 319 selfloop transitions, 174 changer transitions 3/498 dead transitions. [2023-01-28 10:40:43,928 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 498 transitions, 6530 flow [2023-01-28 10:40:43,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-01-28 10:40:43,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-01-28 10:40:43,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1725 transitions. [2023-01-28 10:40:43,930 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3317307692307692 [2023-01-28 10:40:43,931 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1725 transitions. [2023-01-28 10:40:43,931 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1725 transitions. [2023-01-28 10:40:43,931 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:40:43,931 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1725 transitions. [2023-01-28 10:40:43,933 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 132.69230769230768) internal successors, (1725), 13 states have internal predecessors, (1725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:40:43,936 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 400.0) internal successors, (5600), 14 states have internal predecessors, (5600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:40:43,937 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 400.0) internal successors, (5600), 14 states have internal predecessors, (5600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:40:43,937 INFO L175 Difference]: Start difference. First operand has 119 places, 285 transitions, 3215 flow. Second operand 13 states and 1725 transitions. [2023-01-28 10:40:43,937 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 498 transitions, 6530 flow [2023-01-28 10:40:44,454 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 498 transitions, 5929 flow, removed 296 selfloop flow, removed 5 redundant places. [2023-01-28 10:40:44,459 INFO L231 Difference]: Finished difference. Result has 131 places, 343 transitions, 4136 flow [2023-01-28 10:40:44,459 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=400, PETRI_DIFFERENCE_MINUEND_FLOW=2866, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=283, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=4136, PETRI_PLACES=131, PETRI_TRANSITIONS=343} [2023-01-28 10:40:44,459 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 99 predicate places. [2023-01-28 10:40:44,460 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 343 transitions, 4136 flow [2023-01-28 10:40:44,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 127.8) internal successors, (2556), 20 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) [2023-01-28 10:40:44,460 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:40:44,460 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:40:44,465 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-01-28 10:40:44,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-01-28 10:40:44,661 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 10:40:44,661 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:40:44,661 INFO L85 PathProgramCache]: Analyzing trace with hash 1981649645, now seen corresponding path program 4 times [2023-01-28 10:40:44,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:40:44,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268614674] [2023-01-28 10:40:44,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:40:44,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:40:44,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:40:45,854 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:40:45,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:40:45,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268614674] [2023-01-28 10:40:45,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268614674] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:40:45,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884411183] [2023-01-28 10:40:45,854 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 10:40:45,854 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:40:45,855 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:40:45,857 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) [2023-01-28 10:40:45,865 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-01-28 10:40:45,984 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 10:40:45,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:40:45,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 24 conjunts are in the unsatisfiable core [2023-01-28 10:40:45,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:40:46,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 10:40:46,217 INFO L350 Elim1Store]: Elim1 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 18 treesize of output 20 [2023-01-28 10:40:46,275 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 10:40:46,275 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:40:46,411 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:40:46,411 INFO L350 Elim1Store]: Elim1 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 [2023-01-28 10:40:46,418 INFO L350 Elim1Store]: Elim1 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 9 treesize of output 3 [2023-01-28 10:40:46,633 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 10:40:46,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [884411183] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:40:46,633 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:40:46,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9, 9] total 30 [2023-01-28 10:40:46,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655267961] [2023-01-28 10:40:46,633 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:40:46,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-01-28 10:40:46,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:40:46,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-01-28 10:40:46,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=823, Unknown=4, NotChecked=0, Total=930 [2023-01-28 10:40:46,636 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 400 [2023-01-28 10:40:46,637 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 343 transitions, 4136 flow. Second operand has 31 states, 31 states have (on average 116.0) internal successors, (3596), 31 states have internal predecessors, (3596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:40:46,637 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:40:46,637 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 400 [2023-01-28 10:40:46,638 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:40:49,841 WARN L839 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_763 (Array Int Int))) (< 0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_763) c_~q1~0.base) (+ (* c_~q1_front~0 4) c_~q1~0.offset)))) (< 0 |c_thread2Thread1of1ForFork1_~j~0#1|)) is different from false [2023-01-28 10:40:54,889 INFO L130 PetriNetUnfolder]: 19409/28735 cut-off events. [2023-01-28 10:40:54,889 INFO L131 PetriNetUnfolder]: For 321838/321838 co-relation queries the response was YES. [2023-01-28 10:40:54,977 INFO L83 FinitePrefix]: Finished finitePrefix Result has 187710 conditions, 28735 events. 19409/28735 cut-off events. For 321838/321838 co-relation queries the response was YES. Maximal size of possible extension queue 1339. Compared 188689 event pairs, 1385 based on Foata normal form. 392/26931 useless extension candidates. Maximal degree in co-relation 187663. Up to 9027 conditions per place. [2023-01-28 10:40:55,090 INFO L137 encePairwiseOnDemand]: 382/400 looper letters, 937 selfloop transitions, 707 changer transitions 2/1647 dead transitions. [2023-01-28 10:40:55,090 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 1647 transitions, 22260 flow [2023-01-28 10:40:55,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-01-28 10:40:55,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2023-01-28 10:40:55,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 5443 transitions. [2023-01-28 10:40:55,097 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30926136363636364 [2023-01-28 10:40:55,097 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 5443 transitions. [2023-01-28 10:40:55,097 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 5443 transitions. [2023-01-28 10:40:55,098 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:40:55,098 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 5443 transitions. [2023-01-28 10:40:55,104 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 123.70454545454545) internal successors, (5443), 44 states have internal predecessors, (5443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:40:55,114 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 400.0) internal successors, (18000), 45 states have internal predecessors, (18000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:40:55,116 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 400.0) internal successors, (18000), 45 states have internal predecessors, (18000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:40:55,116 INFO L175 Difference]: Start difference. First operand has 131 places, 343 transitions, 4136 flow. Second operand 44 states and 5443 transitions. [2023-01-28 10:40:55,116 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 1647 transitions, 22260 flow [2023-01-28 10:40:56,034 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 1647 transitions, 21756 flow, removed 236 selfloop flow, removed 6 redundant places. [2023-01-28 10:40:56,047 INFO L231 Difference]: Finished difference. Result has 193 places, 984 transitions, 15247 flow [2023-01-28 10:40:56,047 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=400, PETRI_DIFFERENCE_MINUEND_FLOW=4012, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=343, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=161, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=15247, PETRI_PLACES=193, PETRI_TRANSITIONS=984} [2023-01-28 10:40:56,047 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 161 predicate places. [2023-01-28 10:40:56,048 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 984 transitions, 15247 flow [2023-01-28 10:40:56,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 116.0) internal successors, (3596), 31 states have internal predecessors, (3596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:40:56,048 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:40:56,048 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:40:56,053 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-01-28 10:40:56,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-01-28 10:40:56,249 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 10:40:56,249 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:40:56,249 INFO L85 PathProgramCache]: Analyzing trace with hash -2094903761, now seen corresponding path program 5 times [2023-01-28 10:40:56,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:40:56,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066234995] [2023-01-28 10:40:56,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:40:56,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:40:56,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:40:56,837 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 10:40:56,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:40:56,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066234995] [2023-01-28 10:40:56,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066234995] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:40:56,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372282975] [2023-01-28 10:40:56,838 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 10:40:56,838 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:40:56,838 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:40:56,841 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) [2023-01-28 10:40:56,869 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-01-28 10:40:56,975 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 10:40:56,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:40:56,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 38 conjunts are in the unsatisfiable core [2023-01-28 10:40:56,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:40:57,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 10:40:57,264 INFO L350 Elim1Store]: Elim1 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 16 treesize of output 18 [2023-01-28 10:40:57,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 10:40:57,318 INFO L350 Elim1Store]: Elim1 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 16 treesize of output 18 [2023-01-28 10:40:57,428 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 10:40:57,429 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:40:57,470 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_825 (Array Int Int))) (< 0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_825) c_~q1~0.base) (+ (* c_~q1_front~0 4) c_~q1~0.offset)))) is different from false [2023-01-28 10:40:57,477 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_825 (Array Int Int)) (v_ArrVal_824 (Array Int Int))) (< 0 (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_824) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_825) c_~q1~0.base) (+ (* c_~q1_front~0 4) c_~q1~0.offset)))) is different from false [2023-01-28 10:40:57,523 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:40:57,523 INFO L350 Elim1Store]: Elim1 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 158 treesize of output 142 [2023-01-28 10:40:57,529 INFO L350 Elim1Store]: Elim1 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 28 treesize of output 16 [2023-01-28 10:40:57,533 INFO L350 Elim1Store]: Elim1 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 27 treesize of output 21 [2023-01-28 10:40:57,845 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 10:40:57,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [372282975] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:40:57,846 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:40:57,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 12] total 32 [2023-01-28 10:40:57,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484704178] [2023-01-28 10:40:57,846 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:40:57,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-01-28 10:40:57,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:40:57,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-01-28 10:40:57,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=798, Unknown=2, NotChecked=118, Total=1056 [2023-01-28 10:40:57,850 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 400 [2023-01-28 10:40:57,852 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 984 transitions, 15247 flow. Second operand has 33 states, 33 states have (on average 115.96969696969697) internal successors, (3827), 33 states have internal predecessors, (3827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:40:57,852 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:40:57,852 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 400 [2023-01-28 10:40:57,852 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:41:00,825 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 10:41:17,965 INFO L130 PetriNetUnfolder]: 44774/66202 cut-off events. [2023-01-28 10:41:17,965 INFO L131 PetriNetUnfolder]: For 1088696/1088696 co-relation queries the response was YES. [2023-01-28 10:41:18,604 INFO L83 FinitePrefix]: Finished finitePrefix Result has 517873 conditions, 66202 events. 44774/66202 cut-off events. For 1088696/1088696 co-relation queries the response was YES. Maximal size of possible extension queue 2984. Compared 486719 event pairs, 2759 based on Foata normal form. 969/61849 useless extension candidates. Maximal degree in co-relation 517800. Up to 25416 conditions per place. [2023-01-28 10:41:18,972 INFO L137 encePairwiseOnDemand]: 381/400 looper letters, 1660 selfloop transitions, 2314 changer transitions 4/3979 dead transitions. [2023-01-28 10:41:18,973 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 3979 transitions, 68983 flow [2023-01-28 10:41:18,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-01-28 10:41:18,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2023-01-28 10:41:18,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 5173 transitions. [2023-01-28 10:41:18,981 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30791666666666667 [2023-01-28 10:41:18,981 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 5173 transitions. [2023-01-28 10:41:18,981 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 5173 transitions. [2023-01-28 10:41:18,982 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:41:18,982 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 5173 transitions. [2023-01-28 10:41:18,989 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 43 states, 42 states have (on average 123.16666666666667) internal successors, (5173), 42 states have internal predecessors, (5173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:41:19,001 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 43 states, 43 states have (on average 400.0) internal successors, (17200), 43 states have internal predecessors, (17200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:41:19,003 INFO L81 ComplementDD]: Finished complementDD. Result has 43 states, 43 states have (on average 400.0) internal successors, (17200), 43 states have internal predecessors, (17200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:41:19,003 INFO L175 Difference]: Start difference. First operand has 193 places, 984 transitions, 15247 flow. Second operand 42 states and 5173 transitions. [2023-01-28 10:41:19,003 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 3979 transitions, 68983 flow [2023-01-28 10:41:31,894 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 3979 transitions, 66874 flow, removed 1038 selfloop flow, removed 6 redundant places. [2023-01-28 10:41:31,934 INFO L231 Difference]: Finished difference. Result has 258 places, 2740 transitions, 51676 flow [2023-01-28 10:41:31,935 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=400, PETRI_DIFFERENCE_MINUEND_FLOW=14446, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=980, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=646, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=51676, PETRI_PLACES=258, PETRI_TRANSITIONS=2740} [2023-01-28 10:41:31,935 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 226 predicate places. [2023-01-28 10:41:31,935 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 2740 transitions, 51676 flow [2023-01-28 10:41:31,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 115.96969696969697) internal successors, (3827), 33 states have internal predecessors, (3827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:41:31,936 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:41:31,936 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:41:31,941 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-01-28 10:41:32,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-01-28 10:41:32,137 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 10:41:32,137 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:41:32,137 INFO L85 PathProgramCache]: Analyzing trace with hash -1449519811, now seen corresponding path program 9 times [2023-01-28 10:41:32,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:41:32,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756576008] [2023-01-28 10:41:32,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:41:32,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:41:32,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:41:35,053 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:41:35,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:41:35,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756576008] [2023-01-28 10:41:35,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756576008] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:41:35,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1865758798] [2023-01-28 10:41:35,053 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 10:41:35,053 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:41:35,054 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:41:35,054 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) [2023-01-28 10:41:35,056 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-01-28 10:41:35,195 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-01-28 10:41:35,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:41:35,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 40 conjunts are in the unsatisfiable core [2023-01-28 10:41:35,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:41:35,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 10:41:35,513 INFO L350 Elim1Store]: Elim1 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 18 treesize of output 20 [2023-01-28 10:41:35,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 10:41:35,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 10:41:35,709 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-01-28 10:41:35,709 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 36 [2023-01-28 10:41:35,826 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-01-28 10:41:35,826 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-01-28 10:41:35,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1865758798] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 10:41:35,827 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-01-28 10:41:35,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [14] total 23 [2023-01-28 10:41:35,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28391764] [2023-01-28 10:41:35,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 10:41:35,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-01-28 10:41:35,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:41:35,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-01-28 10:41:35,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=547, Unknown=0, NotChecked=0, Total=600 [2023-01-28 10:41:35,828 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 400 [2023-01-28 10:41:35,829 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 2740 transitions, 51676 flow. Second operand has 11 states, 11 states have (on average 131.0) internal successors, (1441), 11 states have internal predecessors, (1441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:41:35,829 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:41:35,829 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 400 [2023-01-28 10:41:35,829 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:42:04,652 INFO L130 PetriNetUnfolder]: 44980/66366 cut-off events. [2023-01-28 10:42:04,652 INFO L131 PetriNetUnfolder]: For 1567192/1567197 co-relation queries the response was YES. [2023-01-28 10:42:05,449 INFO L83 FinitePrefix]: Finished finitePrefix Result has 614720 conditions, 66366 events. 44980/66366 cut-off events. For 1567192/1567197 co-relation queries the response was YES. Maximal size of possible extension queue 2995. Compared 485655 event pairs, 7196 based on Foata normal form. 7/60999 useless extension candidates. Maximal degree in co-relation 614619. Up to 65763 conditions per place. [2023-01-28 10:42:05,790 INFO L137 encePairwiseOnDemand]: 392/400 looper letters, 2723 selfloop transitions, 12 changer transitions 25/2763 dead transitions. [2023-01-28 10:42:05,790 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 2763 transitions, 57383 flow [2023-01-28 10:42:05,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-01-28 10:42:05,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-01-28 10:42:05,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 961 transitions. [2023-01-28 10:42:05,791 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3432142857142857 [2023-01-28 10:42:05,791 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 961 transitions. [2023-01-28 10:42:05,791 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 961 transitions. [2023-01-28 10:42:05,791 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:42:05,791 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 961 transitions. [2023-01-28 10:42:05,792 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 137.28571428571428) internal successors, (961), 7 states have internal predecessors, (961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:42:05,793 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 400.0) internal successors, (3200), 8 states have internal predecessors, (3200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:42:05,794 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 400.0) internal successors, (3200), 8 states have internal predecessors, (3200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:42:05,794 INFO L175 Difference]: Start difference. First operand has 258 places, 2740 transitions, 51676 flow. Second operand 7 states and 961 transitions. [2023-01-28 10:42:05,794 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 2763 transitions, 57383 flow [2023-01-28 10:42:41,822 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 2763 transitions, 55768 flow, removed 796 selfloop flow, removed 6 redundant places. [2023-01-28 10:42:41,875 INFO L231 Difference]: Finished difference. Result has 260 places, 2734 transitions, 50013 flow [2023-01-28 10:42:41,877 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=400, PETRI_DIFFERENCE_MINUEND_FLOW=50061, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2740, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2728, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=50013, PETRI_PLACES=260, PETRI_TRANSITIONS=2734} [2023-01-28 10:42:41,877 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 228 predicate places. [2023-01-28 10:42:41,878 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 2734 transitions, 50013 flow [2023-01-28 10:42:41,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 131.0) internal successors, (1441), 11 states have internal predecessors, (1441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:42:41,878 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:42:41,878 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:42:41,888 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-01-28 10:42:42,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-01-28 10:42:42,083 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 10:42:42,084 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:42:42,084 INFO L85 PathProgramCache]: Analyzing trace with hash 806345314, now seen corresponding path program 6 times [2023-01-28 10:42:42,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:42:42,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487619885] [2023-01-28 10:42:42,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:42:42,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:42:42,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:42:43,003 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 10:42:43,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:42:43,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487619885] [2023-01-28 10:42:43,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487619885] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:42:43,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694301009] [2023-01-28 10:42:43,003 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-28 10:42:43,004 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:42:43,004 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:42:43,005 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) [2023-01-28 10:42:43,006 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-01-28 10:42:43,166 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-01-28 10:42:43,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:42:43,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 24 conjunts are in the unsatisfiable core [2023-01-28 10:42:43,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:42:43,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 10:42:43,300 INFO L350 Elim1Store]: Elim1 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 18 treesize of output 20 [2023-01-28 10:42:43,340 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-28 10:42:43,340 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:42:43,382 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_956 (Array Int Int))) (< 0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_956) c_~q1~0.base) (+ (* c_~q1_front~0 4) c_~q1~0.offset)))) is different from false [2023-01-28 10:42:43,476 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:42:43,476 INFO L350 Elim1Store]: Elim1 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 [2023-01-28 10:42:43,482 INFO L350 Elim1Store]: Elim1 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 9 treesize of output 3 [2023-01-28 10:42:43,545 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-01-28 10:42:43,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [694301009] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:42:43,546 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:42:43,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 6] total 22 [2023-01-28 10:42:43,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563052931] [2023-01-28 10:42:43,546 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:42:43,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-01-28 10:42:43,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:42:43,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-01-28 10:42:43,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=400, Unknown=1, NotChecked=40, Total=506 [2023-01-28 10:42:43,548 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 400 [2023-01-28 10:42:43,549 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 2734 transitions, 50013 flow. Second operand has 23 states, 23 states have (on average 127.65217391304348) internal successors, (2936), 23 states have internal predecessors, (2936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:42:43,549 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:42:43,549 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 400 [2023-01-28 10:42:43,549 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:43:14,110 INFO L130 PetriNetUnfolder]: 45503/67263 cut-off events. [2023-01-28 10:43:14,110 INFO L131 PetriNetUnfolder]: For 1467407/1467411 co-relation queries the response was YES. [2023-01-28 10:43:15,007 INFO L83 FinitePrefix]: Finished finitePrefix Result has 605566 conditions, 67263 events. 45503/67263 cut-off events. For 1467407/1467411 co-relation queries the response was YES. Maximal size of possible extension queue 3028. Compared 494909 event pairs, 3601 based on Foata normal form. 8/61851 useless extension candidates. Maximal degree in co-relation 605462. Up to 30043 conditions per place. [2023-01-28 10:43:15,357 INFO L137 encePairwiseOnDemand]: 391/400 looper letters, 1235 selfloop transitions, 1748 changer transitions 0/2986 dead transitions. [2023-01-28 10:43:15,358 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 2986 transitions, 60036 flow [2023-01-28 10:43:15,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-01-28 10:43:15,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-01-28 10:43:15,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1850 transitions. [2023-01-28 10:43:15,359 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33035714285714285 [2023-01-28 10:43:15,360 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1850 transitions. [2023-01-28 10:43:15,360 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1850 transitions. [2023-01-28 10:43:15,360 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:43:15,360 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1850 transitions. [2023-01-28 10:43:15,362 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 132.14285714285714) internal successors, (1850), 14 states have internal predecessors, (1850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:43:15,365 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 400.0) internal successors, (6000), 15 states have internal predecessors, (6000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:43:15,366 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 400.0) internal successors, (6000), 15 states have internal predecessors, (6000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:43:15,366 INFO L175 Difference]: Start difference. First operand has 260 places, 2734 transitions, 50013 flow. Second operand 14 states and 1850 transitions. [2023-01-28 10:43:15,366 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 2986 transitions, 60036 flow [2023-01-28 10:43:42,034 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 2986 transitions, 59900 flow, removed 55 selfloop flow, removed 7 redundant places. [2023-01-28 10:43:42,084 INFO L231 Difference]: Finished difference. Result has 262 places, 2798 transitions, 57015 flow [2023-01-28 10:43:42,085 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=400, PETRI_DIFFERENCE_MINUEND_FLOW=49921, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2734, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1686, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1028, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=57015, PETRI_PLACES=262, PETRI_TRANSITIONS=2798} [2023-01-28 10:43:42,086 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 230 predicate places. [2023-01-28 10:43:42,086 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 2798 transitions, 57015 flow [2023-01-28 10:43:42,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 127.65217391304348) internal successors, (2936), 23 states have internal predecessors, (2936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:43:42,086 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:43:42,086 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:43:42,092 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-01-28 10:43:42,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:43:42,293 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 10:43:42,293 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:43:42,293 INFO L85 PathProgramCache]: Analyzing trace with hash 1639463054, now seen corresponding path program 7 times [2023-01-28 10:43:42,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:43:42,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020659365] [2023-01-28 10:43:42,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:43:42,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:43:42,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:43:43,006 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 10:43:43,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:43:43,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020659365] [2023-01-28 10:43:43,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020659365] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:43:43,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076020771] [2023-01-28 10:43:43,007 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-28 10:43:43,007 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:43:43,007 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:43:43,008 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) [2023-01-28 10:43:43,010 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-01-28 10:43:43,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:43:43,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 32 conjunts are in the unsatisfiable core [2023-01-28 10:43:43,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:43:43,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 10:43:43,305 INFO L350 Elim1Store]: Elim1 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 18 treesize of output 20 [2023-01-28 10:43:43,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 10:43:43,335 INFO L350 Elim1Store]: Elim1 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 18 treesize of output 20 [2023-01-28 10:43:43,356 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-28 10:43:43,356 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:43:43,392 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1022 (Array Int Int))) (< 0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1022) c_~q1~0.base) (+ (* c_~q1_front~0 4) c_~q1~0.offset)))) is different from false [2023-01-28 10:43:45,460 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:43:45,461 INFO L350 Elim1Store]: Elim1 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 80 treesize of output 72 [2023-01-28 10:43:45,470 INFO L350 Elim1Store]: Elim1 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 60 treesize of output 48 [2023-01-28 10:43:45,474 INFO L350 Elim1Store]: Elim1 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 26 treesize of output 20 [2023-01-28 10:43:45,645 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 1 not checked. [2023-01-28 10:43:45,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2076020771] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:43:45,646 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:43:45,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 28 [2023-01-28 10:43:45,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451777819] [2023-01-28 10:43:45,646 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:43:45,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-01-28 10:43:45,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:43:45,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-01-28 10:43:45,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=656, Unknown=4, NotChecked=52, Total=812 [2023-01-28 10:43:45,648 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 400 [2023-01-28 10:43:45,649 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 2798 transitions, 57015 flow. Second operand has 29 states, 29 states have (on average 116.13793103448276) internal successors, (3368), 29 states have internal predecessors, (3368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:43:45,649 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:43:45,649 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 400 [2023-01-28 10:43:45,649 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Received shutdown request... [2023-01-28 10:44:14,576 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-01-28 10:44:14,614 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-01-28 10:44:15,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-01-28 10:44:15,378 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 4 remaining) [2023-01-28 10:44:15,383 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-01-28 10:44:15,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:44:15,579 WARN L619 AbstractCegarLoop]: Verification canceled: while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (29states, 114/400 universal loopers) in iteration 20,while PetriNetUnfolder was constructing finite prefix that currently has 573472 conditions, 60864 events (41265/60863 cut-off events. For 1538686/1538686 co-relation queries the response was YES. Maximal size of possible extension queue 3080. Compared 457178 event pairs, 2461 based on Foata normal form. 8/57410 useless extension candidates. Maximal degree in co-relation 573370. Up to 22876 conditions per place.). [2023-01-28 10:44:15,581 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 4 remaining) [2023-01-28 10:44:15,581 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2023-01-28 10:44:15,581 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2023-01-28 10:44:15,582 INFO L445 BasicCegarLoop]: Path program histogram: [9, 7, 1, 1, 1, 1] [2023-01-28 10:44:15,585 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-01-28 10:44:15,585 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-01-28 10:44:15,598 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.01 10:44:15 BasicIcfg [2023-01-28 10:44:15,598 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-01-28 10:44:15,602 INFO L158 Benchmark]: Toolchain (without parser) took 813327.58ms. Allocated memory was 513.8MB in the beginning and 12.1GB in the end (delta: 11.6GB). Free memory was 465.4MB in the beginning and 6.4GB in the end (delta: -5.9GB). Peak memory consumption was 6.6GB. Max. memory is 16.0GB. [2023-01-28 10:44:15,602 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 350.2MB. Free memory was 299.2MB in the beginning and 299.0MB in the end (delta: 139.9kB). There was no memory consumed. Max. memory is 16.0GB. [2023-01-28 10:44:15,602 INFO L158 Benchmark]: CACSL2BoogieTranslator took 271.86ms. Allocated memory is still 513.8MB. Free memory was 465.0MB in the beginning and 453.1MB in the end (delta: 11.9MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. [2023-01-28 10:44:15,603 INFO L158 Benchmark]: Boogie Procedure Inliner took 58.77ms. Allocated memory is still 513.8MB. Free memory was 453.1MB in the beginning and 450.7MB in the end (delta: 2.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-01-28 10:44:15,603 INFO L158 Benchmark]: Boogie Preprocessor took 33.65ms. Allocated memory is still 513.8MB. Free memory was 450.7MB in the beginning and 448.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-01-28 10:44:15,603 INFO L158 Benchmark]: RCFGBuilder took 653.83ms. Allocated memory is still 513.8MB. Free memory was 448.6MB in the beginning and 415.0MB in the end (delta: 33.6MB). Peak memory consumption was 33.6MB. Max. memory is 16.0GB. [2023-01-28 10:44:15,604 INFO L158 Benchmark]: TraceAbstraction took 812303.97ms. Allocated memory was 513.8MB in the beginning and 12.1GB in the end (delta: 11.6GB). Free memory was 414.3MB in the beginning and 6.4GB in the end (delta: -5.9GB). Peak memory consumption was 6.5GB. Max. memory is 16.0GB. [2023-01-28 10:44:15,606 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 350.2MB. Free memory was 299.2MB in the beginning and 299.0MB in the end (delta: 139.9kB). There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 271.86ms. Allocated memory is still 513.8MB. Free memory was 465.0MB in the beginning and 453.1MB in the end (delta: 11.9MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 58.77ms. Allocated memory is still 513.8MB. Free memory was 453.1MB in the beginning and 450.7MB in the end (delta: 2.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 33.65ms. Allocated memory is still 513.8MB. Free memory was 450.7MB in the beginning and 448.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 653.83ms. Allocated memory is still 513.8MB. Free memory was 448.6MB in the beginning and 415.0MB in the end (delta: 33.6MB). Peak memory consumption was 33.6MB. Max. memory is 16.0GB. * TraceAbstraction took 812303.97ms. Allocated memory was 513.8MB in the beginning and 12.1GB in the end (delta: 11.6GB). Free memory was 414.3MB in the beginning and 6.4GB in the end (delta: -5.9GB). Peak memory consumption was 6.5GB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 6.2s, 180 PlacesBefore, 32 PlacesAfterwards, 188 TransitionsBefore, 28 TransitionsAfterwards, 1456 CoEnabledTransitionPairs, 7 FixpointIterations, 122 TrivialSequentialCompositions, 27 ConcurrentSequentialCompositions, 26 TrivialYvCompositions, 12 ConcurrentYvCompositions, 12 ChoiceCompositions, 199 TotalNumberOfCompositions, 2169 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 1643, independent: 1586, independent conditional: 0, independent unconditional: 1586, dependent: 57, dependent conditional: 0, dependent unconditional: 57, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 838, independent: 818, independent conditional: 0, independent unconditional: 818, dependent: 20, dependent conditional: 0, dependent unconditional: 20, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 1643, independent: 768, independent conditional: 0, independent unconditional: 768, dependent: 37, dependent conditional: 0, dependent unconditional: 37, unknown: 838, unknown conditional: 0, unknown unconditional: 838] , Statistics on independence cache: Total cache size (in pairs): 64, Positive cache size: 58, Positive conditional cache size: 0, Positive unconditional cache size: 58, Negative cache size: 6, Negative conditional cache size: 0, Negative unconditional cache size: 6, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - TimeoutResultAtElement [Line: 127]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (29states, 114/400 universal loopers) in iteration 20,while PetriNetUnfolder was constructing finite prefix that currently has 573472 conditions, 60864 events (41265/60863 cut-off events. For 1538686/1538686 co-relation queries the response was YES. Maximal size of possible extension queue 3080. Compared 457178 event pairs, 2461 based on Foata normal form. 8/57410 useless extension candidates. Maximal degree in co-relation 573370. Up to 22876 conditions per place.). - TimeoutResultAtElement [Line: 119]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (29states, 114/400 universal loopers) in iteration 20,while PetriNetUnfolder was constructing finite prefix that currently has 573472 conditions, 60864 events (41265/60863 cut-off events. For 1538686/1538686 co-relation queries the response was YES. Maximal size of possible extension queue 3080. Compared 457178 event pairs, 2461 based on Foata normal form. 8/57410 useless extension candidates. Maximal degree in co-relation 573370. Up to 22876 conditions per place.). - TimeoutResultAtElement [Line: 120]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (29states, 114/400 universal loopers) in iteration 20,while PetriNetUnfolder was constructing finite prefix that currently has 573472 conditions, 60864 events (41265/60863 cut-off events. For 1538686/1538686 co-relation queries the response was YES. Maximal size of possible extension queue 3080. Compared 457178 event pairs, 2461 based on Foata normal form. 8/57410 useless extension candidates. Maximal degree in co-relation 573370. Up to 22876 conditions per place.). - TimeoutResultAtElement [Line: 121]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (29states, 114/400 universal loopers) in iteration 20,while PetriNetUnfolder was constructing finite prefix that currently has 573472 conditions, 60864 events (41265/60863 cut-off events. For 1538686/1538686 co-relation queries the response was YES. Maximal size of possible extension queue 3080. Compared 457178 event pairs, 2461 based on Foata normal form. 8/57410 useless extension candidates. Maximal degree in co-relation 573370. Up to 22876 conditions per place.). - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 214 locations, 4 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 812.2s, OverallIterations: 20, TraceHistogramMax: 4, PathProgramHistogramMax: 9, EmptinessCheckTime: 0.0s, AutomataDifference: 686.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 6.3s, HoareTripleCheckerStatistics: 497 mSolverCounterUnknown, 2928 SdHoareTripleChecker+Valid, 72.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2928 mSDsluCounter, 667 SdHoareTripleChecker+Invalid, 71.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 2999 IncrementalHoareTripleChecker+Unchecked, 618 mSDsCounter, 611 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 16581 IncrementalHoareTripleChecker+Invalid, 20688 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 611 mSolverCounterUnsat, 49 mSDtfsCounter, 16581 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 497 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1021 GetRequests, 436 SyntacticMatches, 20 SemanticMatches, 565 ConstructedPredicates, 11 IntricatePredicates, 4 DeprecatedPredicates, 5110 ImplicationChecksByTransitivity, 444.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=57015occurred in iteration=19, InterpolantAutomatonStates: 328, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 1.9s SatisfiabilityAnalysisTime, 112.6s InterpolantComputationTime, 888 NumberOfCodeBlocks, 872 NumberOfCodeBlocksAsserted, 43 NumberOfCheckSat, 1103 ConstructedInterpolants, 95 QuantifiedInterpolants, 33493 SizeOfPredicates, 242 NumberOfNonLiveVariables, 4604 ConjunctsInSsa, 582 ConjunctsInUnsatCore, 45 InterpolantComputations, 10 PerfectInterpolantSequences, 98/223 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown