/usr/bin/java -Xmx8000000000 -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-SemanticLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/popl20-more-array-sum-alt.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.repeated-lipton-8d0d62b [2022-12-05 21:40:04,924 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-05 21:40:04,926 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-05 21:40:04,955 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-05 21:40:04,957 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-05 21:40:04,959 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-05 21:40:04,963 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-05 21:40:04,966 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-05 21:40:04,969 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-05 21:40:04,972 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-05 21:40:04,973 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-05 21:40:04,974 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-05 21:40:04,974 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-05 21:40:04,976 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-05 21:40:04,977 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-05 21:40:04,979 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-05 21:40:04,979 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-05 21:40:04,980 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-05 21:40:04,982 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-05 21:40:04,985 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-05 21:40:04,986 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-05 21:40:04,987 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-05 21:40:04,987 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-05 21:40:04,988 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-05 21:40:04,991 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-05 21:40:04,992 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-05 21:40:04,992 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-05 21:40:04,993 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-05 21:40:04,993 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-05 21:40:04,994 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-05 21:40:04,994 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-05 21:40:04,998 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-05 21:40:04,998 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-05 21:40:04,999 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-05 21:40:04,999 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-05 21:40:05,000 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-05 21:40:05,000 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-05 21:40:05,000 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-05 21:40:05,000 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-05 21:40:05,001 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-05 21:40:05,001 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-05 21:40:05,003 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-SemanticLbe.epf [2022-12-05 21:40:05,026 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-05 21:40:05,026 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-05 21:40:05,027 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-05 21:40:05,027 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-05 21:40:05,028 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-05 21:40:05,028 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-05 21:40:05,028 INFO L138 SettingsManager]: * Use SBE=true [2022-12-05 21:40:05,047 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-05 21:40:05,048 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-05 21:40:05,048 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-05 21:40:05,048 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-05 21:40:05,048 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-05 21:40:05,048 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-05 21:40:05,049 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-05 21:40:05,049 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-05 21:40:05,049 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-05 21:40:05,049 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-05 21:40:05,049 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-05 21:40:05,049 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-05 21:40:05,049 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-05 21:40:05,049 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-05 21:40:05,049 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-12-05 21:40:05,049 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-05 21:40:05,050 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-05 21:40:05,050 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-05 21:40:05,050 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-05 21:40:05,050 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-05 21:40:05,050 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-05 21:40:05,050 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-05 21:40:05,050 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-05 21:40:05,050 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-12-05 21:40:05,306 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-05 21:40:05,325 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-05 21:40:05,327 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-05 21:40:05,327 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-05 21:40:05,332 INFO L275 PluginConnector]: CDTParser initialized [2022-12-05 21:40:05,333 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-more-array-sum-alt.wvr.c [2022-12-05 21:40:06,297 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-05 21:40:06,512 INFO L351 CDTParser]: Found 1 translation units. [2022-12-05 21:40:06,512 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-array-sum-alt.wvr.c [2022-12-05 21:40:06,544 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/61b1e3107/9a6671b7f3bf430a8a52f9a96a592504/FLAG73418b529 [2022-12-05 21:40:06,557 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/61b1e3107/9a6671b7f3bf430a8a52f9a96a592504 [2022-12-05 21:40:06,559 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-05 21:40:06,560 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-12-05 21:40:06,562 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-05 21:40:06,562 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-05 21:40:06,564 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-05 21:40:06,565 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.12 09:40:06" (1/1) ... [2022-12-05 21:40:06,565 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@489d7392 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:40:06, skipping insertion in model container [2022-12-05 21:40:06,565 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.12 09:40:06" (1/1) ... [2022-12-05 21:40:06,570 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-05 21:40:06,585 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-05 21:40:06,700 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 21:40:06,702 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 21:40:06,702 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 21:40:06,703 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 21:40:06,706 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 21:40:06,706 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 21:40:06,707 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 21:40:06,707 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 21:40:06,709 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 21:40:06,710 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 21:40:06,710 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 21:40:06,713 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 21:40:06,721 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-array-sum-alt.wvr.c[2761,2774] [2022-12-05 21:40:06,732 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-05 21:40:06,739 INFO L203 MainTranslator]: Completed pre-run [2022-12-05 21:40:06,749 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 21:40:06,751 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 21:40:06,751 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 21:40:06,752 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 21:40:06,753 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 21:40:06,754 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 21:40:06,754 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 21:40:06,755 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 21:40:06,755 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 21:40:06,757 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 21:40:06,758 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 21:40:06,762 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 21:40:06,769 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-array-sum-alt.wvr.c[2761,2774] [2022-12-05 21:40:06,776 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-05 21:40:06,787 INFO L208 MainTranslator]: Completed translation [2022-12-05 21:40:06,787 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:40:06 WrapperNode [2022-12-05 21:40:06,787 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-05 21:40:06,788 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-05 21:40:06,788 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-05 21:40:06,788 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-05 21:40:06,793 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:40:06" (1/1) ... [2022-12-05 21:40:06,807 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:40:06" (1/1) ... [2022-12-05 21:40:06,829 INFO L138 Inliner]: procedures = 25, calls = 51, calls flagged for inlining = 12, calls inlined = 16, statements flattened = 200 [2022-12-05 21:40:06,830 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-05 21:40:06,830 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-05 21:40:06,830 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-05 21:40:06,830 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-05 21:40:06,836 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:40:06" (1/1) ... [2022-12-05 21:40:06,836 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:40:06" (1/1) ... [2022-12-05 21:40:06,847 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:40:06" (1/1) ... [2022-12-05 21:40:06,847 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:40:06" (1/1) ... [2022-12-05 21:40:06,857 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:40:06" (1/1) ... [2022-12-05 21:40:06,859 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:40:06" (1/1) ... [2022-12-05 21:40:06,860 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:40:06" (1/1) ... [2022-12-05 21:40:06,861 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:40:06" (1/1) ... [2022-12-05 21:40:06,862 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-05 21:40:06,863 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-05 21:40:06,863 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-05 21:40:06,863 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-05 21:40:06,864 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:40:06" (1/1) ... [2022-12-05 21:40:06,867 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-05 21:40:06,886 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:40:06,906 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) [2022-12-05 21:40:06,908 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 [2022-12-05 21:40:06,932 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-05 21:40:06,932 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-05 21:40:06,932 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-05 21:40:06,932 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-05 21:40:06,932 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-12-05 21:40:06,932 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-12-05 21:40:06,933 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-12-05 21:40:06,933 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-12-05 21:40:06,933 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-12-05 21:40:06,933 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-12-05 21:40:06,933 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-05 21:40:06,933 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-12-05 21:40:06,933 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-12-05 21:40:06,933 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-05 21:40:06,933 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-05 21:40:06,933 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-05 21:40:06,933 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-05 21:40:06,934 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2022-12-05 21:40:07,058 INFO L236 CfgBuilder]: Building ICFG [2022-12-05 21:40:07,059 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-05 21:40:07,358 INFO L277 CfgBuilder]: Performing block encoding [2022-12-05 21:40:07,441 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-05 21:40:07,441 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2022-12-05 21:40:07,442 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.12 09:40:07 BoogieIcfgContainer [2022-12-05 21:40:07,442 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-05 21:40:07,444 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-05 21:40:07,444 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-05 21:40:07,446 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-05 21:40:07,446 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.12 09:40:06" (1/3) ... [2022-12-05 21:40:07,446 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@210e0d6d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.12 09:40:07, skipping insertion in model container [2022-12-05 21:40:07,446 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:40:06" (2/3) ... [2022-12-05 21:40:07,449 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@210e0d6d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.12 09:40:07, skipping insertion in model container [2022-12-05 21:40:07,449 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.12 09:40:07" (3/3) ... [2022-12-05 21:40:07,450 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-array-sum-alt.wvr.c [2022-12-05 21:40:07,462 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-05 21:40:07,463 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-05 21:40:07,463 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-05 21:40:07,525 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-12-05 21:40:07,558 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 142 places, 144 transitions, 312 flow [2022-12-05 21:40:07,620 INFO L130 PetriNetUnfolder]: 12/141 cut-off events. [2022-12-05 21:40:07,621 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-12-05 21:40:07,625 INFO L83 FinitePrefix]: Finished finitePrefix Result has 154 conditions, 141 events. 12/141 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 95 event pairs, 0 based on Foata normal form. 0/128 useless extension candidates. Maximal degree in co-relation 104. Up to 2 conditions per place. [2022-12-05 21:40:07,625 INFO L82 GeneralOperation]: Start removeDead. Operand has 142 places, 144 transitions, 312 flow [2022-12-05 21:40:07,627 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 129 places, 131 transitions, 280 flow [2022-12-05 21:40:07,629 INFO L195 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-05 21:40:07,639 INFO L167 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 129 places, 131 transitions, 280 flow [2022-12-05 21:40:07,642 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 129 places, 131 transitions, 280 flow [2022-12-05 21:40:07,662 INFO L130 PetriNetUnfolder]: 12/131 cut-off events. [2022-12-05 21:40:07,663 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-12-05 21:40:07,663 INFO L83 FinitePrefix]: Finished finitePrefix Result has 144 conditions, 131 events. 12/131 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 94 event pairs, 0 based on Foata normal form. 0/119 useless extension candidates. Maximal degree in co-relation 104. Up to 2 conditions per place. [2022-12-05 21:40:07,665 INFO L184 LiptonReduction]: Starting Lipton reduction on Petri net that has 129 places, 131 transitions, 280 flow [2022-12-05 21:40:07,665 INFO L188 LiptonReduction]: Number of co-enabled transitions 1518 [2022-12-05 21:40:12,274 INFO L203 LiptonReduction]: Total number of compositions: 105 [2022-12-05 21:40:12,286 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-05 21:40:12,290 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;@5bb51356, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, Conditionality=CONDITIONAL_DISJUNCTIVE, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-05 21:40:12,290 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-12-05 21:40:12,302 INFO L130 PetriNetUnfolder]: 4/25 cut-off events. [2022-12-05 21:40:12,302 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-12-05 21:40:12,302 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:40:12,303 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:40:12,304 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)] === [2022-12-05 21:40:12,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:40:12,307 INFO L85 PathProgramCache]: Analyzing trace with hash 1674226892, now seen corresponding path program 1 times [2022-12-05 21:40:12,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:40:12,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509982826] [2022-12-05 21:40:12,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:40:12,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:40:12,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:40:12,660 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:40:12,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:40:12,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509982826] [2022-12-05 21:40:12,661 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509982826] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-05 21:40:12,661 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-05 21:40:12,662 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-05 21:40:12,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935248285] [2022-12-05 21:40:12,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 21:40:12,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-05 21:40:12,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:40:12,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-05 21:40:12,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-05 21:40:12,684 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2022-12-05 21:40:12,685 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 26 transitions, 70 flow. Second operand has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:40:12,685 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:40:12,686 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2022-12-05 21:40:12,686 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:40:12,793 INFO L130 PetriNetUnfolder]: 619/869 cut-off events. [2022-12-05 21:40:12,794 INFO L131 PetriNetUnfolder]: For 63/63 co-relation queries the response was YES. [2022-12-05 21:40:12,795 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1812 conditions, 869 events. 619/869 cut-off events. For 63/63 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 3388 event pairs, 95 based on Foata normal form. 1/582 useless extension candidates. Maximal degree in co-relation 1365. Up to 688 conditions per place. [2022-12-05 21:40:12,799 INFO L137 encePairwiseOnDemand]: 21/26 looper letters, 36 selfloop transitions, 4 changer transitions 1/44 dead transitions. [2022-12-05 21:40:12,799 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 44 transitions, 203 flow [2022-12-05 21:40:12,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-05 21:40:12,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-05 21:40:12,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 51 transitions. [2022-12-05 21:40:12,807 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.6538461538461539 [2022-12-05 21:40:12,808 INFO L175 Difference]: Start difference. First operand has 32 places, 26 transitions, 70 flow. Second operand 3 states and 51 transitions. [2022-12-05 21:40:12,808 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 44 transitions, 203 flow [2022-12-05 21:40:12,817 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 44 transitions, 181 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-12-05 21:40:12,819 INFO L231 Difference]: Finished difference. Result has 29 places, 29 transitions, 84 flow [2022-12-05 21:40:12,820 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=58, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=84, PETRI_PLACES=29, PETRI_TRANSITIONS=29} [2022-12-05 21:40:12,824 INFO L294 CegarLoopForPetriNet]: 32 programPoint places, -3 predicate places. [2022-12-05 21:40:12,825 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 29 transitions, 84 flow [2022-12-05 21:40:12,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:40:12,826 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:40:12,828 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:40:12,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-05 21:40:12,832 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)] === [2022-12-05 21:40:12,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:40:12,834 INFO L85 PathProgramCache]: Analyzing trace with hash 693833528, now seen corresponding path program 1 times [2022-12-05 21:40:12,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:40:12,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633735566] [2022-12-05 21:40:12,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:40:12,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:40:12,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:40:12,944 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:40:12,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:40:12,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633735566] [2022-12-05 21:40:12,944 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633735566] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-05 21:40:12,944 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-05 21:40:12,944 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-05 21:40:12,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633010344] [2022-12-05 21:40:12,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 21:40:12,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-05 21:40:12,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:40:12,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-05 21:40:12,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-05 21:40:12,946 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 26 [2022-12-05 21:40:12,946 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 29 transitions, 84 flow. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:40:12,946 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:40:12,946 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 26 [2022-12-05 21:40:12,946 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:40:13,161 INFO L130 PetriNetUnfolder]: 1155/1690 cut-off events. [2022-12-05 21:40:13,162 INFO L131 PetriNetUnfolder]: For 273/273 co-relation queries the response was YES. [2022-12-05 21:40:13,164 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3871 conditions, 1690 events. 1155/1690 cut-off events. For 273/273 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 7700 event pairs, 608 based on Foata normal form. 62/1383 useless extension candidates. Maximal degree in co-relation 1013. Up to 880 conditions per place. [2022-12-05 21:40:13,169 INFO L137 encePairwiseOnDemand]: 21/26 looper letters, 60 selfloop transitions, 4 changer transitions 0/66 dead transitions. [2022-12-05 21:40:13,169 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 66 transitions, 316 flow [2022-12-05 21:40:13,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-05 21:40:13,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-05 21:40:13,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 68 transitions. [2022-12-05 21:40:13,170 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.5230769230769231 [2022-12-05 21:40:13,170 INFO L175 Difference]: Start difference. First operand has 29 places, 29 transitions, 84 flow. Second operand 5 states and 68 transitions. [2022-12-05 21:40:13,170 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 66 transitions, 316 flow [2022-12-05 21:40:13,171 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 66 transitions, 308 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-05 21:40:13,172 INFO L231 Difference]: Finished difference. Result has 35 places, 32 transitions, 110 flow [2022-12-05 21:40:13,172 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=110, PETRI_PLACES=35, PETRI_TRANSITIONS=32} [2022-12-05 21:40:13,172 INFO L294 CegarLoopForPetriNet]: 32 programPoint places, 3 predicate places. [2022-12-05 21:40:13,173 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 32 transitions, 110 flow [2022-12-05 21:40:13,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:40:13,173 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:40:13,173 INFO L213 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] [2022-12-05 21:40:13,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-05 21:40:13,173 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)] === [2022-12-05 21:40:13,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:40:13,174 INFO L85 PathProgramCache]: Analyzing trace with hash 784987016, now seen corresponding path program 1 times [2022-12-05 21:40:13,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:40:13,174 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163676871] [2022-12-05 21:40:13,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:40:13,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:40:13,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:40:13,263 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-05 21:40:13,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:40:13,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163676871] [2022-12-05 21:40:13,263 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163676871] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:40:13,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102064932] [2022-12-05 21:40:13,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:40:13,264 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:40:13,264 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:40:13,279 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) [2022-12-05 21:40:13,341 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-05 21:40:13,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:40:13,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-05 21:40:13,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:40:13,487 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-05 21:40:13,488 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:40:13,521 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-05 21:40:13,521 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1102064932] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-05 21:40:13,521 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-05 21:40:13,521 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 12 [2022-12-05 21:40:13,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549826453] [2022-12-05 21:40:13,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 21:40:13,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-05 21:40:13,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:40:13,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-05 21:40:13,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2022-12-05 21:40:13,522 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 26 [2022-12-05 21:40:13,522 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 32 transitions, 110 flow. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:40:13,523 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:40:13,523 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 26 [2022-12-05 21:40:13,523 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:40:13,849 INFO L130 PetriNetUnfolder]: 1377/2035 cut-off events. [2022-12-05 21:40:13,849 INFO L131 PetriNetUnfolder]: For 706/782 co-relation queries the response was YES. [2022-12-05 21:40:13,851 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4774 conditions, 2035 events. 1377/2035 cut-off events. For 706/782 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 9583 event pairs, 437 based on Foata normal form. 76/1813 useless extension candidates. Maximal degree in co-relation 3286. Up to 520 conditions per place. [2022-12-05 21:40:13,857 INFO L137 encePairwiseOnDemand]: 17/26 looper letters, 105 selfloop transitions, 23 changer transitions 0/130 dead transitions. [2022-12-05 21:40:13,857 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 130 transitions, 653 flow [2022-12-05 21:40:13,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-05 21:40:13,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-12-05 21:40:13,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 125 transitions. [2022-12-05 21:40:13,860 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.4807692307692308 [2022-12-05 21:40:13,860 INFO L175 Difference]: Start difference. First operand has 35 places, 32 transitions, 110 flow. Second operand 10 states and 125 transitions. [2022-12-05 21:40:13,860 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 130 transitions, 653 flow [2022-12-05 21:40:13,863 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 130 transitions, 649 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-12-05 21:40:13,864 INFO L231 Difference]: Finished difference. Result has 49 places, 51 transitions, 269 flow [2022-12-05 21:40:13,865 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=269, PETRI_PLACES=49, PETRI_TRANSITIONS=51} [2022-12-05 21:40:13,865 INFO L294 CegarLoopForPetriNet]: 32 programPoint places, 17 predicate places. [2022-12-05 21:40:13,865 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 51 transitions, 269 flow [2022-12-05 21:40:13,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:40:13,866 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:40:13,866 INFO L213 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] [2022-12-05 21:40:13,884 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-05 21:40:14,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:40:14,072 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)] === [2022-12-05 21:40:14,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:40:14,072 INFO L85 PathProgramCache]: Analyzing trace with hash 1356687604, now seen corresponding path program 2 times [2022-12-05 21:40:14,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:40:14,074 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109902037] [2022-12-05 21:40:14,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:40:14,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:40:14,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:40:14,176 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-05 21:40:14,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:40:14,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109902037] [2022-12-05 21:40:14,176 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109902037] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:40:14,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122119390] [2022-12-05 21:40:14,177 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-05 21:40:14,177 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:40:14,177 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:40:14,178 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) [2022-12-05 21:40:14,207 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-05 21:40:14,284 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-05 21:40:14,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:40:14,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-05 21:40:14,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:40:14,332 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-05 21:40:14,333 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:40:14,385 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-05 21:40:14,386 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2122119390] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-05 21:40:14,386 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-05 21:40:14,386 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 12 [2022-12-05 21:40:14,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706728897] [2022-12-05 21:40:14,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 21:40:14,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-05 21:40:14,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:40:14,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-05 21:40:14,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2022-12-05 21:40:14,388 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 26 [2022-12-05 21:40:14,389 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 51 transitions, 269 flow. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:40:14,389 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:40:14,389 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 26 [2022-12-05 21:40:14,389 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:40:14,795 INFO L130 PetriNetUnfolder]: 1639/2417 cut-off events. [2022-12-05 21:40:14,796 INFO L131 PetriNetUnfolder]: For 2776/2852 co-relation queries the response was YES. [2022-12-05 21:40:14,800 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7536 conditions, 2417 events. 1639/2417 cut-off events. For 2776/2852 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 11725 event pairs, 394 based on Foata normal form. 88/2501 useless extension candidates. Maximal degree in co-relation 5518. Up to 594 conditions per place. [2022-12-05 21:40:14,808 INFO L137 encePairwiseOnDemand]: 16/26 looper letters, 112 selfloop transitions, 48 changer transitions 0/162 dead transitions. [2022-12-05 21:40:14,808 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 162 transitions, 1037 flow [2022-12-05 21:40:14,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-05 21:40:14,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-12-05 21:40:14,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 135 transitions. [2022-12-05 21:40:14,811 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.4326923076923077 [2022-12-05 21:40:14,811 INFO L175 Difference]: Start difference. First operand has 49 places, 51 transitions, 269 flow. Second operand 12 states and 135 transitions. [2022-12-05 21:40:14,811 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 162 transitions, 1037 flow [2022-12-05 21:40:14,820 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 162 transitions, 1036 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-05 21:40:14,823 INFO L231 Difference]: Finished difference. Result has 65 places, 81 transitions, 631 flow [2022-12-05 21:40:14,823 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=268, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=631, PETRI_PLACES=65, PETRI_TRANSITIONS=81} [2022-12-05 21:40:14,824 INFO L294 CegarLoopForPetriNet]: 32 programPoint places, 33 predicate places. [2022-12-05 21:40:14,824 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 81 transitions, 631 flow [2022-12-05 21:40:14,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:40:14,824 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:40:14,824 INFO L213 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] [2022-12-05 21:40:14,843 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-12-05 21:40:15,029 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,SelfDestructingSolverStorable3 [2022-12-05 21:40:15,030 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)] === [2022-12-05 21:40:15,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:40:15,030 INFO L85 PathProgramCache]: Analyzing trace with hash 579628118, now seen corresponding path program 3 times [2022-12-05 21:40:15,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:40:15,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440642409] [2022-12-05 21:40:15,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:40:15,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:40:15,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:40:15,120 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-05 21:40:15,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:40:15,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440642409] [2022-12-05 21:40:15,123 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440642409] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:40:15,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1594382748] [2022-12-05 21:40:15,123 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-05 21:40:15,123 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:40:15,124 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:40:15,125 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) [2022-12-05 21:40:15,161 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-05 21:40:15,221 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-05 21:40:15,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:40:15,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-05 21:40:15,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:40:15,286 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-05 21:40:15,286 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:40:15,333 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-05 21:40:15,333 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1594382748] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-05 21:40:15,333 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-05 21:40:15,333 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 13 [2022-12-05 21:40:15,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720973935] [2022-12-05 21:40:15,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 21:40:15,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-05 21:40:15,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:40:15,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-05 21:40:15,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-12-05 21:40:15,334 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 26 [2022-12-05 21:40:15,334 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 81 transitions, 631 flow. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:40:15,334 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:40:15,334 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 26 [2022-12-05 21:40:15,334 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:40:15,760 INFO L130 PetriNetUnfolder]: 1990/2931 cut-off events. [2022-12-05 21:40:15,761 INFO L131 PetriNetUnfolder]: For 7441/7529 co-relation queries the response was YES. [2022-12-05 21:40:15,765 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11661 conditions, 2931 events. 1990/2931 cut-off events. For 7441/7529 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 14599 event pairs, 442 based on Foata normal form. 104/3031 useless extension candidates. Maximal degree in co-relation 9393. Up to 728 conditions per place. [2022-12-05 21:40:15,777 INFO L137 encePairwiseOnDemand]: 15/26 looper letters, 125 selfloop transitions, 66 changer transitions 0/193 dead transitions. [2022-12-05 21:40:15,777 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 193 transitions, 1555 flow [2022-12-05 21:40:15,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-05 21:40:15,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-12-05 21:40:15,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 148 transitions. [2022-12-05 21:40:15,778 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.5174825174825175 [2022-12-05 21:40:15,778 INFO L175 Difference]: Start difference. First operand has 65 places, 81 transitions, 631 flow. Second operand 11 states and 148 transitions. [2022-12-05 21:40:15,778 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 193 transitions, 1555 flow [2022-12-05 21:40:15,809 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 193 transitions, 1492 flow, removed 23 selfloop flow, removed 3 redundant places. [2022-12-05 21:40:15,811 INFO L231 Difference]: Finished difference. Result has 78 places, 107 transitions, 1055 flow [2022-12-05 21:40:15,812 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=592, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1055, PETRI_PLACES=78, PETRI_TRANSITIONS=107} [2022-12-05 21:40:15,812 INFO L294 CegarLoopForPetriNet]: 32 programPoint places, 46 predicate places. [2022-12-05 21:40:15,812 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 107 transitions, 1055 flow [2022-12-05 21:40:15,812 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:40:15,812 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:40:15,813 INFO L213 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] [2022-12-05 21:40:15,834 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-12-05 21:40:16,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:40:16,018 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)] === [2022-12-05 21:40:16,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:40:16,018 INFO L85 PathProgramCache]: Analyzing trace with hash -547763042, now seen corresponding path program 1 times [2022-12-05 21:40:16,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:40:16,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872339041] [2022-12-05 21:40:16,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:40:16,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:40:16,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:40:16,095 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:40:16,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:40:16,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872339041] [2022-12-05 21:40:16,095 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872339041] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-05 21:40:16,095 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-05 21:40:16,095 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-05 21:40:16,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192612546] [2022-12-05 21:40:16,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 21:40:16,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-05 21:40:16,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:40:16,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-05 21:40:16,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-05 21:40:16,096 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 26 [2022-12-05 21:40:16,096 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 107 transitions, 1055 flow. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:40:16,096 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:40:16,096 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 26 [2022-12-05 21:40:16,096 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:40:16,380 INFO L130 PetriNetUnfolder]: 1726/2553 cut-off events. [2022-12-05 21:40:16,380 INFO L131 PetriNetUnfolder]: For 12046/12094 co-relation queries the response was YES. [2022-12-05 21:40:16,385 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11824 conditions, 2553 events. 1726/2553 cut-off events. For 12046/12094 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 12307 event pairs, 757 based on Foata normal form. 94/2643 useless extension candidates. Maximal degree in co-relation 10363. Up to 2150 conditions per place. [2022-12-05 21:40:16,401 INFO L137 encePairwiseOnDemand]: 21/26 looper letters, 113 selfloop transitions, 4 changer transitions 0/119 dead transitions. [2022-12-05 21:40:16,402 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 119 transitions, 1300 flow [2022-12-05 21:40:16,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-05 21:40:16,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-05 21:40:16,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 62 transitions. [2022-12-05 21:40:16,402 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.47692307692307695 [2022-12-05 21:40:16,403 INFO L175 Difference]: Start difference. First operand has 78 places, 107 transitions, 1055 flow. Second operand 5 states and 62 transitions. [2022-12-05 21:40:16,403 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 119 transitions, 1300 flow [2022-12-05 21:40:16,449 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 119 transitions, 1227 flow, removed 14 selfloop flow, removed 6 redundant places. [2022-12-05 21:40:16,451 INFO L231 Difference]: Finished difference. Result has 73 places, 93 transitions, 903 flow [2022-12-05 21:40:16,452 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=895, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=903, PETRI_PLACES=73, PETRI_TRANSITIONS=93} [2022-12-05 21:40:16,452 INFO L294 CegarLoopForPetriNet]: 32 programPoint places, 41 predicate places. [2022-12-05 21:40:16,452 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 93 transitions, 903 flow [2022-12-05 21:40:16,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:40:16,452 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:40:16,452 INFO L213 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] [2022-12-05 21:40:16,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-05 21:40:16,453 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)] === [2022-12-05 21:40:16,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:40:16,453 INFO L85 PathProgramCache]: Analyzing trace with hash -1808795212, now seen corresponding path program 4 times [2022-12-05 21:40:16,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:40:16,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511642639] [2022-12-05 21:40:16,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:40:16,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:40:16,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:40:16,531 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-05 21:40:16,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:40:16,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511642639] [2022-12-05 21:40:16,532 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511642639] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:40:16,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405541654] [2022-12-05 21:40:16,532 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-05 21:40:16,532 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:40:16,532 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:40:16,533 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) [2022-12-05 21:40:16,555 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-05 21:40:16,619 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-05 21:40:16,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:40:16,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-05 21:40:16,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:40:16,686 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-05 21:40:16,686 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:40:16,727 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-05 21:40:16,727 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1405541654] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-05 21:40:16,727 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-05 21:40:16,727 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 13 [2022-12-05 21:40:16,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346652925] [2022-12-05 21:40:16,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 21:40:16,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-05 21:40:16,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:40:16,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-05 21:40:16,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2022-12-05 21:40:16,730 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 26 [2022-12-05 21:40:16,731 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 93 transitions, 903 flow. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:40:16,731 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:40:16,731 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 26 [2022-12-05 21:40:16,731 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:40:17,091 INFO L130 PetriNetUnfolder]: 1766/2617 cut-off events. [2022-12-05 21:40:17,091 INFO L131 PetriNetUnfolder]: For 9523/9571 co-relation queries the response was YES. [2022-12-05 21:40:17,096 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11622 conditions, 2617 events. 1766/2617 cut-off events. For 9523/9571 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 12844 event pairs, 406 based on Foata normal form. 64/2677 useless extension candidates. Maximal degree in co-relation 10267. Up to 772 conditions per place. [2022-12-05 21:40:17,106 INFO L137 encePairwiseOnDemand]: 15/26 looper letters, 107 selfloop transitions, 55 changer transitions 0/164 dead transitions. [2022-12-05 21:40:17,106 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 164 transitions, 1576 flow [2022-12-05 21:40:17,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-05 21:40:17,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-12-05 21:40:17,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 114 transitions. [2022-12-05 21:40:17,107 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.48717948717948717 [2022-12-05 21:40:17,107 INFO L175 Difference]: Start difference. First operand has 73 places, 93 transitions, 903 flow. Second operand 9 states and 114 transitions. [2022-12-05 21:40:17,107 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 164 transitions, 1576 flow [2022-12-05 21:40:17,131 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 164 transitions, 1528 flow, removed 4 selfloop flow, removed 4 redundant places. [2022-12-05 21:40:17,133 INFO L231 Difference]: Finished difference. Result has 80 places, 102 transitions, 1161 flow [2022-12-05 21:40:17,133 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=864, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1161, PETRI_PLACES=80, PETRI_TRANSITIONS=102} [2022-12-05 21:40:17,133 INFO L294 CegarLoopForPetriNet]: 32 programPoint places, 48 predicate places. [2022-12-05 21:40:17,133 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 102 transitions, 1161 flow [2022-12-05 21:40:17,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:40:17,134 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:40:17,134 INFO L213 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] [2022-12-05 21:40:17,139 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-12-05 21:40:17,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:40:17,339 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)] === [2022-12-05 21:40:17,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:40:17,339 INFO L85 PathProgramCache]: Analyzing trace with hash -384760878, now seen corresponding path program 1 times [2022-12-05 21:40:17,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:40:17,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554916677] [2022-12-05 21:40:17,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:40:17,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:40:17,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:40:17,432 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:40:17,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:40:17,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554916677] [2022-12-05 21:40:17,433 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554916677] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-05 21:40:17,433 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-05 21:40:17,433 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-05 21:40:17,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139085038] [2022-12-05 21:40:17,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 21:40:17,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-05 21:40:17,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:40:17,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-05 21:40:17,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-05 21:40:17,434 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 26 [2022-12-05 21:40:17,434 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 102 transitions, 1161 flow. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:40:17,434 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:40:17,434 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 26 [2022-12-05 21:40:17,434 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:40:17,680 INFO L130 PetriNetUnfolder]: 1490/2208 cut-off events. [2022-12-05 21:40:17,680 INFO L131 PetriNetUnfolder]: For 14197/14303 co-relation queries the response was YES. [2022-12-05 21:40:17,684 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11141 conditions, 2208 events. 1490/2208 cut-off events. For 14197/14303 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 10607 event pairs, 438 based on Foata normal form. 96/2270 useless extension candidates. Maximal degree in co-relation 10734. Up to 1413 conditions per place. [2022-12-05 21:40:17,693 INFO L137 encePairwiseOnDemand]: 20/26 looper letters, 103 selfloop transitions, 5 changer transitions 25/138 dead transitions. [2022-12-05 21:40:17,693 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 138 transitions, 1617 flow [2022-12-05 21:40:17,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-05 21:40:17,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-05 21:40:17,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 71 transitions. [2022-12-05 21:40:17,694 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.4551282051282051 [2022-12-05 21:40:17,694 INFO L175 Difference]: Start difference. First operand has 80 places, 102 transitions, 1161 flow. Second operand 6 states and 71 transitions. [2022-12-05 21:40:17,694 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 138 transitions, 1617 flow [2022-12-05 21:40:17,721 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 138 transitions, 1561 flow, removed 13 selfloop flow, removed 4 redundant places. [2022-12-05 21:40:17,723 INFO L231 Difference]: Finished difference. Result has 79 places, 95 transitions, 1071 flow [2022-12-05 21:40:17,723 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=1086, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1071, PETRI_PLACES=79, PETRI_TRANSITIONS=95} [2022-12-05 21:40:17,724 INFO L294 CegarLoopForPetriNet]: 32 programPoint places, 47 predicate places. [2022-12-05 21:40:17,724 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 95 transitions, 1071 flow [2022-12-05 21:40:17,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:40:17,724 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:40:17,724 INFO L213 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] [2022-12-05 21:40:17,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-05 21:40:17,725 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)] === [2022-12-05 21:40:17,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:40:17,725 INFO L85 PathProgramCache]: Analyzing trace with hash 251871502, now seen corresponding path program 5 times [2022-12-05 21:40:17,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:40:17,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122719547] [2022-12-05 21:40:17,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:40:17,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:40:17,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:40:17,796 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-05 21:40:17,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:40:17,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122719547] [2022-12-05 21:40:17,796 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122719547] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:40:17,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968642186] [2022-12-05 21:40:17,796 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-05 21:40:17,797 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:40:17,797 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:40:17,798 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) [2022-12-05 21:40:17,800 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-05 21:40:17,874 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-05 21:40:17,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:40:17,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-05 21:40:17,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:40:17,930 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-05 21:40:17,930 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:40:17,994 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-05 21:40:17,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1968642186] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:40:17,994 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:40:17,995 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 14 [2022-12-05 21:40:17,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822158275] [2022-12-05 21:40:17,995 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:40:17,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-05 21:40:17,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:40:17,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-05 21:40:17,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2022-12-05 21:40:17,997 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 26 [2022-12-05 21:40:17,997 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 95 transitions, 1071 flow. Second operand has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 14 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:40:17,997 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:40:17,997 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 26 [2022-12-05 21:40:17,997 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:40:18,617 INFO L130 PetriNetUnfolder]: 1888/2760 cut-off events. [2022-12-05 21:40:18,617 INFO L131 PetriNetUnfolder]: For 14665/14665 co-relation queries the response was YES. [2022-12-05 21:40:18,623 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14269 conditions, 2760 events. 1888/2760 cut-off events. For 14665/14665 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 12468 event pairs, 28 based on Foata normal form. 14/2773 useless extension candidates. Maximal degree in co-relation 14227. Up to 733 conditions per place. [2022-12-05 21:40:18,635 INFO L137 encePairwiseOnDemand]: 15/26 looper letters, 175 selfloop transitions, 147 changer transitions 0/322 dead transitions. [2022-12-05 21:40:18,636 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 322 transitions, 3843 flow [2022-12-05 21:40:18,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-12-05 21:40:18,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-12-05 21:40:18,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 188 transitions. [2022-12-05 21:40:18,637 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.3443223443223443 [2022-12-05 21:40:18,637 INFO L175 Difference]: Start difference. First operand has 79 places, 95 transitions, 1071 flow. Second operand 21 states and 188 transitions. [2022-12-05 21:40:18,637 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 322 transitions, 3843 flow [2022-12-05 21:40:18,723 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 322 transitions, 3740 flow, removed 17 selfloop flow, removed 5 redundant places. [2022-12-05 21:40:18,729 INFO L231 Difference]: Finished difference. Result has 98 places, 200 transitions, 2994 flow [2022-12-05 21:40:18,729 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=1041, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=2994, PETRI_PLACES=98, PETRI_TRANSITIONS=200} [2022-12-05 21:40:18,730 INFO L294 CegarLoopForPetriNet]: 32 programPoint places, 66 predicate places. [2022-12-05 21:40:18,730 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 200 transitions, 2994 flow [2022-12-05 21:40:18,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 14 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:40:18,730 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:40:18,730 INFO L213 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] [2022-12-05 21:40:18,735 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-12-05 21:40:18,935 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 [2022-12-05 21:40:18,936 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)] === [2022-12-05 21:40:18,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:40:18,937 INFO L85 PathProgramCache]: Analyzing trace with hash 1492755434, now seen corresponding path program 6 times [2022-12-05 21:40:18,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:40:18,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696790538] [2022-12-05 21:40:18,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:40:18,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:40:18,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:40:19,030 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-05 21:40:19,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:40:19,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696790538] [2022-12-05 21:40:19,030 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696790538] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:40:19,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951287898] [2022-12-05 21:40:19,031 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-05 21:40:19,031 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:40:19,031 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:40:19,032 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) [2022-12-05 21:40:19,048 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-05 21:40:19,145 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-12-05 21:40:19,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:40:19,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-05 21:40:19,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:40:19,212 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-05 21:40:19,212 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:40:19,278 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-05 21:40:19,279 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1951287898] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-05 21:40:19,279 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-05 21:40:19,279 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 14 [2022-12-05 21:40:19,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966274749] [2022-12-05 21:40:19,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 21:40:19,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-05 21:40:19,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:40:19,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-05 21:40:19,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2022-12-05 21:40:19,282 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 26 [2022-12-05 21:40:19,282 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 200 transitions, 2994 flow. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:40:19,282 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:40:19,282 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 26 [2022-12-05 21:40:19,282 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:40:19,648 INFO L130 PetriNetUnfolder]: 1811/2653 cut-off events. [2022-12-05 21:40:19,648 INFO L131 PetriNetUnfolder]: For 18980/18986 co-relation queries the response was YES. [2022-12-05 21:40:19,657 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15349 conditions, 2653 events. 1811/2653 cut-off events. For 18980/18986 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 11999 event pairs, 210 based on Foata normal form. 20/2670 useless extension candidates. Maximal degree in co-relation 15300. Up to 741 conditions per place. [2022-12-05 21:40:19,669 INFO L137 encePairwiseOnDemand]: 16/26 looper letters, 79 selfloop transitions, 148 changer transitions 0/236 dead transitions. [2022-12-05 21:40:19,669 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 236 transitions, 3584 flow [2022-12-05 21:40:19,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-05 21:40:19,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-05 21:40:19,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 82 transitions. [2022-12-05 21:40:19,670 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.3942307692307692 [2022-12-05 21:40:19,670 INFO L175 Difference]: Start difference. First operand has 98 places, 200 transitions, 2994 flow. Second operand 8 states and 82 transitions. [2022-12-05 21:40:19,670 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 236 transitions, 3584 flow [2022-12-05 21:40:19,747 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 236 transitions, 3513 flow, removed 34 selfloop flow, removed 2 redundant places. [2022-12-05 21:40:19,751 INFO L231 Difference]: Finished difference. Result has 106 places, 202 transitions, 3455 flow [2022-12-05 21:40:19,752 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=2925, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=146, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3455, PETRI_PLACES=106, PETRI_TRANSITIONS=202} [2022-12-05 21:40:19,752 INFO L294 CegarLoopForPetriNet]: 32 programPoint places, 74 predicate places. [2022-12-05 21:40:19,753 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 202 transitions, 3455 flow [2022-12-05 21:40:19,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:40:19,753 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:40:19,753 INFO L213 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] [2022-12-05 21:40:19,775 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-12-05 21:40:19,958 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 [2022-12-05 21:40:19,961 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)] === [2022-12-05 21:40:19,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:40:19,961 INFO L85 PathProgramCache]: Analyzing trace with hash 1958148396, now seen corresponding path program 1 times [2022-12-05 21:40:19,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:40:19,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854300437] [2022-12-05 21:40:19,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:40:19,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:40:19,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:40:20,027 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:40:20,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:40:20,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854300437] [2022-12-05 21:40:20,028 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854300437] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:40:20,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839124347] [2022-12-05 21:40:20,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:40:20,028 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:40:20,028 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:40:20,029 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) [2022-12-05 21:40:20,043 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-05 21:40:20,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:40:20,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-05 21:40:20,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:40:20,147 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:40:20,147 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:40:20,169 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:40:20,169 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [839124347] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-05 21:40:20,169 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-05 21:40:20,169 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2022-12-05 21:40:20,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287696453] [2022-12-05 21:40:20,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 21:40:20,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-05 21:40:20,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:40:20,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-05 21:40:20,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-12-05 21:40:20,170 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 26 [2022-12-05 21:40:20,170 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 202 transitions, 3455 flow. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:40:20,171 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:40:20,171 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 26 [2022-12-05 21:40:20,171 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:40:20,466 INFO L130 PetriNetUnfolder]: 1646/2376 cut-off events. [2022-12-05 21:40:20,466 INFO L131 PetriNetUnfolder]: For 29676/29978 co-relation queries the response was YES. [2022-12-05 21:40:20,472 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15267 conditions, 2376 events. 1646/2376 cut-off events. For 29676/29978 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 10778 event pairs, 444 based on Foata normal form. 307/2607 useless extension candidates. Maximal degree in co-relation 15214. Up to 1801 conditions per place. [2022-12-05 21:40:20,480 INFO L137 encePairwiseOnDemand]: 21/26 looper letters, 239 selfloop transitions, 13 changer transitions 0/271 dead transitions. [2022-12-05 21:40:20,480 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 271 transitions, 5023 flow [2022-12-05 21:40:20,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-05 21:40:20,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-05 21:40:20,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 48 transitions. [2022-12-05 21:40:20,481 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.36923076923076925 [2022-12-05 21:40:20,481 INFO L175 Difference]: Start difference. First operand has 106 places, 202 transitions, 3455 flow. Second operand 5 states and 48 transitions. [2022-12-05 21:40:20,481 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 271 transitions, 5023 flow [2022-12-05 21:40:20,544 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 271 transitions, 4859 flow, removed 10 selfloop flow, removed 6 redundant places. [2022-12-05 21:40:20,550 INFO L231 Difference]: Finished difference. Result has 105 places, 203 transitions, 3376 flow [2022-12-05 21:40:20,550 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=3331, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3376, PETRI_PLACES=105, PETRI_TRANSITIONS=203} [2022-12-05 21:40:20,550 INFO L294 CegarLoopForPetriNet]: 32 programPoint places, 73 predicate places. [2022-12-05 21:40:20,550 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 203 transitions, 3376 flow [2022-12-05 21:40:20,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:40:20,550 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:40:20,551 INFO L213 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] [2022-12-05 21:40:20,566 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-12-05 21:40:20,755 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 [2022-12-05 21:40:20,756 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)] === [2022-12-05 21:40:20,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:40:20,756 INFO L85 PathProgramCache]: Analyzing trace with hash 555698156, now seen corresponding path program 1 times [2022-12-05 21:40:20,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:40:20,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693784324] [2022-12-05 21:40:20,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:40:20,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:40:20,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:40:21,244 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:40:21,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:40:21,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693784324] [2022-12-05 21:40:21,245 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693784324] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:40:21,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [873113665] [2022-12-05 21:40:21,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:40:21,245 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:40:21,245 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:40:21,246 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) [2022-12-05 21:40:21,288 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-05 21:40:21,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:40:21,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 71 conjunts are in the unsatisfiable core [2022-12-05 21:40:21,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:40:21,437 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 11 treesize of output 7 [2022-12-05 21:40:21,481 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 [2022-12-05 21:40:21,539 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 [2022-12-05 21:40:21,576 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 [2022-12-05 21:40:21,679 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-05 21:40:21,681 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 21:40:21,681 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 17 treesize of output 10 [2022-12-05 21:40:21,706 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:40:21,706 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:40:22,081 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 21:40:22,081 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 61 treesize of output 50 [2022-12-05 21:40:22,099 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 21:40:22,100 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 806 treesize of output 768 [2022-12-05 21:40:22,129 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 21:40:22,129 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 758 treesize of output 704 [2022-12-05 21:40:22,144 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 21:40:22,144 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 694 treesize of output 576 [2022-12-05 21:40:22,157 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 21:40:22,158 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 566 treesize of output 544 [2022-12-05 21:40:22,565 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:40:22,565 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [873113665] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:40:22,565 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:40:22,565 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 26 [2022-12-05 21:40:22,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588086494] [2022-12-05 21:40:22,566 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:40:22,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-12-05 21:40:22,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:40:22,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-12-05 21:40:22,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=629, Unknown=6, NotChecked=0, Total=756 [2022-12-05 21:40:22,567 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 26 [2022-12-05 21:40:22,568 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 203 transitions, 3376 flow. Second operand has 28 states, 28 states have (on average 2.892857142857143) internal successors, (81), 28 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:40:22,568 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:40:22,568 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 26 [2022-12-05 21:40:22,568 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:40:24,842 INFO L130 PetriNetUnfolder]: 4144/6068 cut-off events. [2022-12-05 21:40:24,842 INFO L131 PetriNetUnfolder]: For 59873/60059 co-relation queries the response was YES. [2022-12-05 21:40:24,857 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38444 conditions, 6068 events. 4144/6068 cut-off events. For 59873/60059 co-relation queries the response was YES. Maximal size of possible extension queue 294. Compared 31416 event pairs, 269 based on Foata normal form. 164/6216 useless extension candidates. Maximal degree in co-relation 34802. Up to 2419 conditions per place. [2022-12-05 21:40:24,879 INFO L137 encePairwiseOnDemand]: 15/26 looper letters, 397 selfloop transitions, 403 changer transitions 3/811 dead transitions. [2022-12-05 21:40:24,880 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 811 transitions, 13397 flow [2022-12-05 21:40:24,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-12-05 21:40:24,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2022-12-05 21:40:24,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 277 transitions. [2022-12-05 21:40:24,881 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.3804945054945055 [2022-12-05 21:40:24,881 INFO L175 Difference]: Start difference. First operand has 105 places, 203 transitions, 3376 flow. Second operand 28 states and 277 transitions. [2022-12-05 21:40:24,881 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 811 transitions, 13397 flow [2022-12-05 21:40:25,091 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 811 transitions, 13288 flow, removed 17 selfloop flow, removed 3 redundant places. [2022-12-05 21:40:25,101 INFO L231 Difference]: Finished difference. Result has 145 places, 566 transitions, 11008 flow [2022-12-05 21:40:25,101 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=3357, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=11008, PETRI_PLACES=145, PETRI_TRANSITIONS=566} [2022-12-05 21:40:25,102 INFO L294 CegarLoopForPetriNet]: 32 programPoint places, 113 predicate places. [2022-12-05 21:40:25,102 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 566 transitions, 11008 flow [2022-12-05 21:40:25,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.892857142857143) internal successors, (81), 28 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:40:25,102 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:40:25,102 INFO L213 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] [2022-12-05 21:40:25,107 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-12-05 21:40:25,307 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,SelfDestructingSolverStorable11 [2022-12-05 21:40:25,307 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)] === [2022-12-05 21:40:25,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:40:25,308 INFO L85 PathProgramCache]: Analyzing trace with hash -1850805548, now seen corresponding path program 1 times [2022-12-05 21:40:25,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:40:25,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61909476] [2022-12-05 21:40:25,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:40:25,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:40:25,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:40:25,678 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-05 21:40:25,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:40:25,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61909476] [2022-12-05 21:40:25,679 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61909476] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:40:25,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599966591] [2022-12-05 21:40:25,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:40:25,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:40:25,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:40:25,710 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) [2022-12-05 21:40:25,775 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-05 21:40:25,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:40:25,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 62 conjunts are in the unsatisfiable core [2022-12-05 21:40:25,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:40:25,888 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 11 treesize of output 7 [2022-12-05 21:40:25,933 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 [2022-12-05 21:40:25,977 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 [2022-12-05 21:40:25,998 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 [2022-12-05 21:40:26,036 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-05 21:40:26,051 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:40:26,051 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:40:26,106 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-05 21:40:26,106 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [599966591] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:40:26,106 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:40:26,106 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10, 5] total 15 [2022-12-05 21:40:26,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266726872] [2022-12-05 21:40:26,107 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:40:26,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-05 21:40:26,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:40:26,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-05 21:40:26,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2022-12-05 21:40:26,108 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 26 [2022-12-05 21:40:26,108 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 566 transitions, 11008 flow. Second operand has 17 states, 17 states have (on average 3.7058823529411766) internal successors, (63), 17 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:40:26,108 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:40:26,108 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 26 [2022-12-05 21:40:26,108 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:40:27,770 INFO L130 PetriNetUnfolder]: 6143/9041 cut-off events. [2022-12-05 21:40:27,770 INFO L131 PetriNetUnfolder]: For 120871/121030 co-relation queries the response was YES. [2022-12-05 21:40:27,797 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64524 conditions, 9041 events. 6143/9041 cut-off events. For 120871/121030 co-relation queries the response was YES. Maximal size of possible extension queue 445. Compared 50144 event pairs, 842 based on Foata normal form. 141/9131 useless extension candidates. Maximal degree in co-relation 63731. Up to 6181 conditions per place. [2022-12-05 21:40:27,832 INFO L137 encePairwiseOnDemand]: 16/26 looper letters, 589 selfloop transitions, 323 changer transitions 1/934 dead transitions. [2022-12-05 21:40:27,832 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 934 transitions, 18916 flow [2022-12-05 21:40:27,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-05 21:40:27,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-12-05 21:40:27,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 151 transitions. [2022-12-05 21:40:27,833 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.483974358974359 [2022-12-05 21:40:27,833 INFO L175 Difference]: Start difference. First operand has 145 places, 566 transitions, 11008 flow. Second operand 12 states and 151 transitions. [2022-12-05 21:40:27,833 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 934 transitions, 18916 flow [2022-12-05 21:40:28,540 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 934 transitions, 18442 flow, removed 236 selfloop flow, removed 1 redundant places. [2022-12-05 21:40:28,552 INFO L231 Difference]: Finished difference. Result has 162 places, 762 transitions, 15752 flow [2022-12-05 21:40:28,553 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=10698, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=566, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=158, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=342, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=15752, PETRI_PLACES=162, PETRI_TRANSITIONS=762} [2022-12-05 21:40:28,553 INFO L294 CegarLoopForPetriNet]: 32 programPoint places, 130 predicate places. [2022-12-05 21:40:28,553 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 762 transitions, 15752 flow [2022-12-05 21:40:28,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.7058823529411766) internal successors, (63), 17 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:40:28,553 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:40:28,553 INFO L213 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] [2022-12-05 21:40:28,558 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-12-05 21:40:28,757 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,SelfDestructingSolverStorable12 [2022-12-05 21:40:28,758 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)] === [2022-12-05 21:40:28,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:40:28,758 INFO L85 PathProgramCache]: Analyzing trace with hash -1974676962, now seen corresponding path program 2 times [2022-12-05 21:40:28,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:40:28,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215829399] [2022-12-05 21:40:28,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:40:28,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:40:28,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:40:29,070 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-05 21:40:29,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:40:29,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215829399] [2022-12-05 21:40:29,070 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215829399] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:40:29,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1901002731] [2022-12-05 21:40:29,071 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-05 21:40:29,071 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:40:29,071 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:40:29,087 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) [2022-12-05 21:40:29,117 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-05 21:40:29,227 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-05 21:40:29,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:40:29,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 47 conjunts are in the unsatisfiable core [2022-12-05 21:40:29,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:40:29,287 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-05 21:40:29,302 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-05 21:40:29,303 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:40:29,342 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 21:40:29,342 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 19 treesize of output 18 [2022-12-05 21:40:29,363 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-05 21:40:29,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1901002731] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:40:29,363 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:40:29,363 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 5] total 11 [2022-12-05 21:40:29,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320475791] [2022-12-05 21:40:29,364 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:40:29,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-05 21:40:29,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:40:29,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-05 21:40:29,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-12-05 21:40:29,365 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 26 [2022-12-05 21:40:29,365 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 762 transitions, 15752 flow. Second operand has 13 states, 13 states have (on average 4.0) internal successors, (52), 13 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:40:29,365 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:40:29,365 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 26 [2022-12-05 21:40:29,365 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:40:31,684 INFO L130 PetriNetUnfolder]: 8047/11884 cut-off events. [2022-12-05 21:40:31,685 INFO L131 PetriNetUnfolder]: For 176525/176763 co-relation queries the response was YES. [2022-12-05 21:40:31,726 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89112 conditions, 11884 events. 8047/11884 cut-off events. For 176525/176763 co-relation queries the response was YES. Maximal size of possible extension queue 602. Compared 69790 event pairs, 792 based on Foata normal form. 193/11957 useless extension candidates. Maximal degree in co-relation 88125. Up to 7798 conditions per place. [2022-12-05 21:40:31,802 INFO L137 encePairwiseOnDemand]: 16/26 looper letters, 637 selfloop transitions, 413 changer transitions 1/1072 dead transitions. [2022-12-05 21:40:31,802 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 1072 transitions, 22691 flow [2022-12-05 21:40:31,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-05 21:40:31,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-12-05 21:40:31,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 156 transitions. [2022-12-05 21:40:31,803 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.5454545454545454 [2022-12-05 21:40:31,803 INFO L175 Difference]: Start difference. First operand has 162 places, 762 transitions, 15752 flow. Second operand 11 states and 156 transitions. [2022-12-05 21:40:31,803 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 1072 transitions, 22691 flow [2022-12-05 21:40:33,104 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 1072 transitions, 22423 flow, removed 58 selfloop flow, removed 2 redundant places. [2022-12-05 21:40:33,121 INFO L231 Difference]: Finished difference. Result has 176 places, 909 transitions, 19704 flow [2022-12-05 21:40:33,121 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=15484, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=762, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=298, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=410, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=19704, PETRI_PLACES=176, PETRI_TRANSITIONS=909} [2022-12-05 21:40:33,122 INFO L294 CegarLoopForPetriNet]: 32 programPoint places, 144 predicate places. [2022-12-05 21:40:33,122 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 909 transitions, 19704 flow [2022-12-05 21:40:33,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 13 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:40:33,124 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:40:33,124 INFO L213 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] [2022-12-05 21:40:33,131 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-12-05 21:40:33,329 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,SelfDestructingSolverStorable13 [2022-12-05 21:40:33,329 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)] === [2022-12-05 21:40:33,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:40:33,329 INFO L85 PathProgramCache]: Analyzing trace with hash 852360296, now seen corresponding path program 2 times [2022-12-05 21:40:33,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:40:33,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176594697] [2022-12-05 21:40:33,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:40:33,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:40:33,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:40:33,791 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:40:33,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:40:33,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176594697] [2022-12-05 21:40:33,791 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176594697] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:40:33,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982460904] [2022-12-05 21:40:33,791 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-05 21:40:33,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:40:33,792 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:40:33,795 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) [2022-12-05 21:40:33,798 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-05 21:40:33,891 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-05 21:40:33,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:40:33,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 58 conjunts are in the unsatisfiable core [2022-12-05 21:40:33,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:40:34,199 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-05 21:40:34,201 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 21:40:34,201 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 17 treesize of output 10 [2022-12-05 21:40:34,217 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:40:34,217 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:40:34,312 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 21:40:34,313 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 23 treesize of output 20 [2022-12-05 21:40:34,493 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:40:34,493 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [982460904] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:40:34,493 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:40:34,493 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 8] total 24 [2022-12-05 21:40:34,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714911684] [2022-12-05 21:40:34,494 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:40:34,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-12-05 21:40:34,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:40:34,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-12-05 21:40:34,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=565, Unknown=0, NotChecked=0, Total=650 [2022-12-05 21:40:34,495 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 26 [2022-12-05 21:40:34,495 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 909 transitions, 19704 flow. Second operand has 26 states, 25 states have (on average 2.56) internal successors, (64), 25 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:40:34,495 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:40:34,495 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 26 [2022-12-05 21:40:34,495 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:40:42,620 INFO L130 PetriNetUnfolder]: 13581/19931 cut-off events. [2022-12-05 21:40:42,621 INFO L131 PetriNetUnfolder]: For 321273/321273 co-relation queries the response was YES. [2022-12-05 21:40:42,699 INFO L83 FinitePrefix]: Finished finitePrefix Result has 160756 conditions, 19931 events. 13581/19931 cut-off events. For 321273/321273 co-relation queries the response was YES. Maximal size of possible extension queue 969. Compared 124469 event pairs, 524 based on Foata normal form. 8/19938 useless extension candidates. Maximal degree in co-relation 159574. Up to 8232 conditions per place. [2022-12-05 21:40:42,786 INFO L137 encePairwiseOnDemand]: 9/26 looper letters, 936 selfloop transitions, 1190 changer transitions 7/2133 dead transitions. [2022-12-05 21:40:42,786 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 2133 transitions, 42271 flow [2022-12-05 21:40:42,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-12-05 21:40:42,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2022-12-05 21:40:42,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 758 transitions. [2022-12-05 21:40:42,793 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.3599240265906933 [2022-12-05 21:40:42,793 INFO L175 Difference]: Start difference. First operand has 176 places, 909 transitions, 19704 flow. Second operand 81 states and 758 transitions. [2022-12-05 21:40:42,793 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 2133 transitions, 42271 flow [2022-12-05 21:40:46,411 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 2133 transitions, 41269 flow, removed 398 selfloop flow, removed 2 redundant places. [2022-12-05 21:40:46,442 INFO L231 Difference]: Finished difference. Result has 280 places, 1509 transitions, 35886 flow [2022-12-05 21:40:46,443 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=19174, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=909, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=645, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=81, PETRI_FLOW=35886, PETRI_PLACES=280, PETRI_TRANSITIONS=1509} [2022-12-05 21:40:46,443 INFO L294 CegarLoopForPetriNet]: 32 programPoint places, 248 predicate places. [2022-12-05 21:40:46,443 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 1509 transitions, 35886 flow [2022-12-05 21:40:46,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.56) internal successors, (64), 25 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:40:46,444 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:40:46,444 INFO L213 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] [2022-12-05 21:40:46,451 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-12-05 21:40:46,649 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,SelfDestructingSolverStorable14 [2022-12-05 21:40:46,649 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)] === [2022-12-05 21:40:46,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:40:46,650 INFO L85 PathProgramCache]: Analyzing trace with hash 1129633972, now seen corresponding path program 3 times [2022-12-05 21:40:46,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:40:46,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044277502] [2022-12-05 21:40:46,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:40:46,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:40:46,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:40:47,083 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-05 21:40:47,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:40:47,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044277502] [2022-12-05 21:40:47,083 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044277502] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:40:47,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [569813533] [2022-12-05 21:40:47,083 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-05 21:40:47,084 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:40:47,084 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:40:47,085 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) [2022-12-05 21:40:47,125 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-05 21:40:47,187 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-05 21:40:47,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:40:47,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 52 conjunts are in the unsatisfiable core [2022-12-05 21:40:47,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:40:47,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-05 21:40:47,276 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 14 treesize of output 16 [2022-12-05 21:40:47,298 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-05 21:40:47,314 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-05 21:40:47,314 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:40:47,348 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_619 (Array Int Int))) (= (+ c_~res2~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_619) c_~A~0.base) c_~A~0.offset)) c_~res1~0)) is different from false [2022-12-05 21:40:47,355 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 21:40:47,356 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 46 treesize of output 36 [2022-12-05 21:40:47,358 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 13 treesize of output 11 [2022-12-05 21:40:47,406 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 1 not checked. [2022-12-05 21:40:47,407 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [569813533] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:40:47,407 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:40:47,407 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2022-12-05 21:40:47,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365475869] [2022-12-05 21:40:47,407 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:40:47,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-05 21:40:47,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:40:47,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-05 21:40:47,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=311, Unknown=1, NotChecked=36, Total=420 [2022-12-05 21:40:47,408 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 26 [2022-12-05 21:40:47,408 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 1509 transitions, 35886 flow. Second operand has 21 states, 21 states have (on average 3.3333333333333335) internal successors, (70), 21 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:40:47,408 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:40:47,408 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 26 [2022-12-05 21:40:47,408 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:40:54,183 INFO L130 PetriNetUnfolder]: 14480/21318 cut-off events. [2022-12-05 21:40:54,184 INFO L131 PetriNetUnfolder]: For 471422/472072 co-relation queries the response was YES. [2022-12-05 21:40:54,307 INFO L83 FinitePrefix]: Finished finitePrefix Result has 194755 conditions, 21318 events. 14480/21318 cut-off events. For 471422/472072 co-relation queries the response was YES. Maximal size of possible extension queue 1100. Compared 136450 event pairs, 1431 based on Foata normal form. 485/21618 useless extension candidates. Maximal degree in co-relation 193621. Up to 12840 conditions per place. [2022-12-05 21:40:54,511 INFO L137 encePairwiseOnDemand]: 17/26 looper letters, 988 selfloop transitions, 791 changer transitions 2/1816 dead transitions. [2022-12-05 21:40:54,512 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 1816 transitions, 44776 flow [2022-12-05 21:40:54,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-05 21:40:54,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-12-05 21:40:54,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 180 transitions. [2022-12-05 21:40:54,513 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.5325443786982249 [2022-12-05 21:40:54,513 INFO L175 Difference]: Start difference. First operand has 280 places, 1509 transitions, 35886 flow. Second operand 13 states and 180 transitions. [2022-12-05 21:40:54,513 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 1816 transitions, 44776 flow [2022-12-05 21:41:01,621 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 1816 transitions, 43078 flow, removed 625 selfloop flow, removed 9 redundant places. [2022-12-05 21:41:01,652 INFO L231 Difference]: Finished difference. Result has 291 places, 1642 transitions, 39658 flow [2022-12-05 21:41:01,653 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=34222, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1509, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=683, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=791, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=39658, PETRI_PLACES=291, PETRI_TRANSITIONS=1642} [2022-12-05 21:41:01,653 INFO L294 CegarLoopForPetriNet]: 32 programPoint places, 259 predicate places. [2022-12-05 21:41:01,654 INFO L495 AbstractCegarLoop]: Abstraction has has 291 places, 1642 transitions, 39658 flow [2022-12-05 21:41:01,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.3333333333333335) internal successors, (70), 21 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:41:01,654 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:41:01,654 INFO L213 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] [2022-12-05 21:41:01,660 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-12-05 21:41:01,854 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,SelfDestructingSolverStorable15 [2022-12-05 21:41:01,854 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)] === [2022-12-05 21:41:01,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:41:01,855 INFO L85 PathProgramCache]: Analyzing trace with hash -1464322802, now seen corresponding path program 3 times [2022-12-05 21:41:01,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:41:01,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696829972] [2022-12-05 21:41:01,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:41:01,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:41:01,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:41:02,323 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:41:02,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:41:02,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696829972] [2022-12-05 21:41:02,324 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696829972] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:41:02,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213555327] [2022-12-05 21:41:02,324 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-05 21:41:02,324 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:41:02,324 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:41:02,336 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) [2022-12-05 21:41:02,336 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-05 21:41:02,426 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-05 21:41:02,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:41:02,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 65 conjunts are in the unsatisfiable core [2022-12-05 21:41:02,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:41:02,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-05 21:41:02,604 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 14 treesize of output 16 [2022-12-05 21:41:02,663 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-05 21:41:02,665 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 21:41:02,665 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 17 treesize of output 10 [2022-12-05 21:41:02,677 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:41:02,677 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:41:02,763 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 21:41:02,763 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 54 treesize of output 42 [2022-12-05 21:41:02,765 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 17 treesize of output 11 [2022-12-05 21:41:02,897 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:41:02,897 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1213555327] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:41:02,898 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:41:02,898 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 25 [2022-12-05 21:41:02,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824119477] [2022-12-05 21:41:02,898 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:41:02,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-12-05 21:41:02,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:41:02,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-12-05 21:41:02,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=610, Unknown=1, NotChecked=0, Total=702 [2022-12-05 21:41:02,899 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 26 [2022-12-05 21:41:02,899 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 1642 transitions, 39658 flow. Second operand has 27 states, 27 states have (on average 3.0) internal successors, (81), 27 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:41:02,899 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:41:02,899 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 26 [2022-12-05 21:41:02,899 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:41:12,220 INFO L130 PetriNetUnfolder]: 17521/25823 cut-off events. [2022-12-05 21:41:12,220 INFO L131 PetriNetUnfolder]: For 547607/548018 co-relation queries the response was YES. [2022-12-05 21:41:12,393 INFO L83 FinitePrefix]: Finished finitePrefix Result has 241643 conditions, 25823 events. 17521/25823 cut-off events. For 547607/548018 co-relation queries the response was YES. Maximal size of possible extension queue 1247. Compared 169040 event pairs, 919 based on Foata normal form. 266/25996 useless extension candidates. Maximal degree in co-relation 239868. Up to 11792 conditions per place. [2022-12-05 21:41:12,652 INFO L137 encePairwiseOnDemand]: 14/26 looper letters, 906 selfloop transitions, 1266 changer transitions 7/2209 dead transitions. [2022-12-05 21:41:12,653 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 2209 transitions, 54146 flow [2022-12-05 21:41:12,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-05 21:41:12,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-12-05 21:41:12,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 297 transitions. [2022-12-05 21:41:12,654 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.47596153846153844 [2022-12-05 21:41:12,654 INFO L175 Difference]: Start difference. First operand has 291 places, 1642 transitions, 39658 flow. Second operand 24 states and 297 transitions. [2022-12-05 21:41:12,654 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 2209 transitions, 54146 flow [2022-12-05 21:41:22,842 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 2209 transitions, 53364 flow, removed 288 selfloop flow, removed 2 redundant places. [2022-12-05 21:41:22,879 INFO L231 Difference]: Finished difference. Result has 320 places, 1871 transitions, 48997 flow [2022-12-05 21:41:22,880 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=39150, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1642, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1056, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=530, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=48997, PETRI_PLACES=320, PETRI_TRANSITIONS=1871} [2022-12-05 21:41:22,880 INFO L294 CegarLoopForPetriNet]: 32 programPoint places, 288 predicate places. [2022-12-05 21:41:22,880 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 1871 transitions, 48997 flow [2022-12-05 21:41:22,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.0) internal successors, (81), 27 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:41:22,880 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:41:22,881 INFO L213 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] [2022-12-05 21:41:22,886 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-12-05 21:41:23,085 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,SelfDestructingSolverStorable16 [2022-12-05 21:41:23,086 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)] === [2022-12-05 21:41:23,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:41:23,086 INFO L85 PathProgramCache]: Analyzing trace with hash 785402266, now seen corresponding path program 4 times [2022-12-05 21:41:23,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:41:23,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70209769] [2022-12-05 21:41:23,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:41:23,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:41:23,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:41:23,363 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-05 21:41:23,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:41:23,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70209769] [2022-12-05 21:41:23,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70209769] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:41:23,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1583898480] [2022-12-05 21:41:23,363 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-05 21:41:23,363 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:41:23,363 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:41:23,382 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) [2022-12-05 21:41:23,383 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-05 21:41:23,476 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-05 21:41:23,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:41:23,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 67 conjunts are in the unsatisfiable core [2022-12-05 21:41:23,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:41:23,487 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 18 treesize of output 16 [2022-12-05 21:41:23,508 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 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 [2022-12-05 21:41:23,533 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 [2022-12-05 21:41:23,559 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 [2022-12-05 21:41:23,586 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 [2022-12-05 21:41:23,618 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-05 21:41:23,642 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:41:23,642 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:41:23,701 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-05 21:41:23,701 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1583898480] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:41:23,701 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:41:23,701 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10, 5] total 16 [2022-12-05 21:41:23,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454096656] [2022-12-05 21:41:23,702 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:41:23,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-05 21:41:23,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:41:23,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-05 21:41:23,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2022-12-05 21:41:23,702 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 26 [2022-12-05 21:41:23,702 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 1871 transitions, 48997 flow. Second operand has 18 states, 18 states have (on average 3.7222222222222223) internal successors, (67), 18 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:41:23,702 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:41:23,703 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 26 [2022-12-05 21:41:23,703 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:41:34,713 INFO L130 PetriNetUnfolder]: 19745/29061 cut-off events. [2022-12-05 21:41:34,714 INFO L131 PetriNetUnfolder]: For 755433/756327 co-relation queries the response was YES. [2022-12-05 21:41:34,952 INFO L83 FinitePrefix]: Finished finitePrefix Result has 286849 conditions, 29061 events. 19745/29061 cut-off events. For 755433/756327 co-relation queries the response was YES. Maximal size of possible extension queue 1433. Compared 193569 event pairs, 5270 based on Foata normal form. 712/29546 useless extension candidates. Maximal degree in co-relation 284688. Up to 24581 conditions per place. [2022-12-05 21:41:35,212 INFO L137 encePairwiseOnDemand]: 16/26 looper letters, 1830 selfloop transitions, 416 changer transitions 1/2287 dead transitions. [2022-12-05 21:41:35,213 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 2287 transitions, 61788 flow [2022-12-05 21:41:35,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-05 21:41:35,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-12-05 21:41:35,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 151 transitions. [2022-12-05 21:41:35,214 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.4467455621301775 [2022-12-05 21:41:35,214 INFO L175 Difference]: Start difference. First operand has 320 places, 1871 transitions, 48997 flow. Second operand 13 states and 151 transitions. [2022-12-05 21:41:35,214 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 2287 transitions, 61788 flow [2022-12-05 21:41:50,327 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 323 places, 2287 transitions, 61319 flow, removed 97 selfloop flow, removed 9 redundant places. [2022-12-05 21:41:50,393 INFO L231 Difference]: Finished difference. Result has 330 places, 2068 transitions, 54390 flow [2022-12-05 21:41:50,394 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=48588, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1871, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=250, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1507, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=54390, PETRI_PLACES=330, PETRI_TRANSITIONS=2068} [2022-12-05 21:41:50,394 INFO L294 CegarLoopForPetriNet]: 32 programPoint places, 298 predicate places. [2022-12-05 21:41:50,395 INFO L495 AbstractCegarLoop]: Abstraction has has 330 places, 2068 transitions, 54390 flow [2022-12-05 21:41:50,395 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.7222222222222223) internal successors, (67), 18 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:41:50,395 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:41:50,395 INFO L213 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] [2022-12-05 21:41:50,408 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-12-05 21:41:50,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:41:50,595 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)] === [2022-12-05 21:41:50,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:41:50,596 INFO L85 PathProgramCache]: Analyzing trace with hash -1883032, now seen corresponding path program 4 times [2022-12-05 21:41:50,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:41:50,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23341145] [2022-12-05 21:41:50,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:41:50,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:41:50,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:41:51,083 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:41:51,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:41:51,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23341145] [2022-12-05 21:41:51,083 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23341145] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:41:51,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [766569063] [2022-12-05 21:41:51,083 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-05 21:41:51,084 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:41:51,084 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:41:51,085 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) [2022-12-05 21:41:51,111 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-05 21:41:51,197 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-05 21:41:51,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:41:51,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 56 conjunts are in the unsatisfiable core [2022-12-05 21:41:51,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:41:51,409 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2022-12-05 21:41:51,422 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-05 21:41:51,422 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:41:51,463 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 21:41:51,463 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 23 treesize of output 20 [2022-12-05 21:41:51,594 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-05 21:41:51,594 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [766569063] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:41:51,594 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:41:51,594 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 8] total 25 [2022-12-05 21:41:51,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398625866] [2022-12-05 21:41:51,594 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:41:51,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-12-05 21:41:51,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:41:51,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-12-05 21:41:51,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=607, Unknown=0, NotChecked=0, Total=702 [2022-12-05 21:41:51,597 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 26 [2022-12-05 21:41:51,597 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 330 places, 2068 transitions, 54390 flow. Second operand has 27 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 26 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:41:51,597 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:41:51,597 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 26 [2022-12-05 21:41:51,597 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:42:05,264 INFO L130 PetriNetUnfolder]: 21915/32248 cut-off events. [2022-12-05 21:42:05,264 INFO L131 PetriNetUnfolder]: For 820696/820696 co-relation queries the response was YES. [2022-12-05 21:42:05,517 INFO L83 FinitePrefix]: Finished finitePrefix Result has 324991 conditions, 32248 events. 21915/32248 cut-off events. For 820696/820696 co-relation queries the response was YES. Maximal size of possible extension queue 1541. Compared 215863 event pairs, 4978 based on Foata normal form. 4/32252 useless extension candidates. Maximal degree in co-relation 322177. Up to 25346 conditions per place. [2022-12-05 21:42:05,687 INFO L137 encePairwiseOnDemand]: 13/26 looper letters, 1480 selfloop transitions, 1071 changer transitions 1/2552 dead transitions. [2022-12-05 21:42:05,688 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 2552 transitions, 70829 flow [2022-12-05 21:42:05,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-12-05 21:42:05,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2022-12-05 21:42:05,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 148 transitions. [2022-12-05 21:42:05,688 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.2846153846153846 [2022-12-05 21:42:05,689 INFO L175 Difference]: Start difference. First operand has 330 places, 2068 transitions, 54390 flow. Second operand 20 states and 148 transitions. [2022-12-05 21:42:05,689 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 2552 transitions, 70829 flow [2022-12-05 21:42:26,158 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 346 places, 2552 transitions, 70155 flow, removed 261 selfloop flow, removed 3 redundant places. [2022-12-05 21:42:26,206 INFO L231 Difference]: Finished difference. Result has 353 places, 2415 transitions, 66416 flow [2022-12-05 21:42:26,207 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=53738, PETRI_DIFFERENCE_MINUEND_PLACES=327, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2068, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=741, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=66416, PETRI_PLACES=353, PETRI_TRANSITIONS=2415} [2022-12-05 21:42:26,207 INFO L294 CegarLoopForPetriNet]: 32 programPoint places, 321 predicate places. [2022-12-05 21:42:26,207 INFO L495 AbstractCegarLoop]: Abstraction has has 353 places, 2415 transitions, 66416 flow [2022-12-05 21:42:26,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 26 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:42:26,208 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:42:26,208 INFO L213 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] [2022-12-05 21:42:26,212 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-12-05 21:42:26,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:42:26,413 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)] === [2022-12-05 21:42:26,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:42:26,413 INFO L85 PathProgramCache]: Analyzing trace with hash -1691383584, now seen corresponding path program 5 times [2022-12-05 21:42:26,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:42:26,413 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9775578] [2022-12-05 21:42:26,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:42:26,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:42:26,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:42:26,652 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-05 21:42:26,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:42:26,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9775578] [2022-12-05 21:42:26,652 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9775578] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:42:26,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166472326] [2022-12-05 21:42:26,653 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-05 21:42:26,653 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:42:26,653 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:42:26,654 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 21:42:26,699 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-12-05 21:42:26,766 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-05 21:42:26,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:42:26,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 45 conjunts are in the unsatisfiable core [2022-12-05 21:42:26,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:42:26,853 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-05 21:42:26,861 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-05 21:42:26,861 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:42:26,898 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 21:42:26,899 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 23 treesize of output 20 [2022-12-05 21:42:26,930 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-05 21:42:26,930 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1166472326] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:42:26,931 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:42:26,931 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 5] total 16 [2022-12-05 21:42:26,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084296779] [2022-12-05 21:42:26,931 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:42:26,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-05 21:42:26,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:42:26,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-05 21:42:26,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2022-12-05 21:42:26,933 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 26 [2022-12-05 21:42:26,934 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 353 places, 2415 transitions, 66416 flow. Second operand has 18 states, 18 states have (on average 3.8333333333333335) internal successors, (69), 18 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:42:26,934 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:42:26,934 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 26 [2022-12-05 21:42:26,934 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:42:41,945 INFO L130 PetriNetUnfolder]: 22502/33146 cut-off events. [2022-12-05 21:42:41,946 INFO L131 PetriNetUnfolder]: For 987514/988457 co-relation queries the response was YES. [2022-12-05 21:42:42,299 INFO L83 FinitePrefix]: Finished finitePrefix Result has 348679 conditions, 33146 events. 22502/33146 cut-off events. For 987514/988457 co-relation queries the response was YES. Maximal size of possible extension queue 1721. Compared 226413 event pairs, 6556 based on Foata normal form. 718/33529 useless extension candidates. Maximal degree in co-relation 347885. Up to 30693 conditions per place. [2022-12-05 21:42:42,469 INFO L137 encePairwiseOnDemand]: 17/26 looper letters, 2202 selfloop transitions, 423 changer transitions 1/2668 dead transitions. [2022-12-05 21:42:42,470 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 363 places, 2668 transitions, 77136 flow [2022-12-05 21:42:42,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-05 21:42:42,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-12-05 21:42:42,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 127 transitions. [2022-12-05 21:42:42,472 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.44405594405594406 [2022-12-05 21:42:42,472 INFO L175 Difference]: Start difference. First operand has 353 places, 2415 transitions, 66416 flow. Second operand 11 states and 127 transitions. [2022-12-05 21:42:42,472 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 363 places, 2668 transitions, 77136 flow [2022-12-05 21:43:03,415 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 358 places, 2668 transitions, 76225 flow, removed 285 selfloop flow, removed 5 redundant places. [2022-12-05 21:43:03,471 INFO L231 Difference]: Finished difference. Result has 363 places, 2558 transitions, 70399 flow [2022-12-05 21:43:03,472 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=65597, PETRI_DIFFERENCE_MINUEND_PLACES=348, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2415, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=299, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2034, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=70399, PETRI_PLACES=363, PETRI_TRANSITIONS=2558} [2022-12-05 21:43:03,472 INFO L294 CegarLoopForPetriNet]: 32 programPoint places, 331 predicate places. [2022-12-05 21:43:03,472 INFO L495 AbstractCegarLoop]: Abstraction has has 363 places, 2558 transitions, 70399 flow [2022-12-05 21:43:03,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.8333333333333335) internal successors, (69), 18 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:43:03,473 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:43:03,473 INFO L213 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] [2022-12-05 21:43:03,480 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-12-05 21:43:03,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:43:03,678 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-05 21:43:03,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:43:03,679 INFO L85 PathProgramCache]: Analyzing trace with hash 2146620594, now seen corresponding path program 5 times [2022-12-05 21:43:03,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:43:03,679 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436890654] [2022-12-05 21:43:03,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:43:03,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:43:03,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:43:04,217 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:43:04,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:43:04,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436890654] [2022-12-05 21:43:04,217 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436890654] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:43:04,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068101663] [2022-12-05 21:43:04,217 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-05 21:43:04,217 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:43:04,218 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:43:04,233 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 21:43:04,234 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-12-05 21:43:04,326 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-05 21:43:04,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:43:04,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 56 conjunts are in the unsatisfiable core [2022-12-05 21:43:04,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:43:04,532 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-05 21:43:04,538 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-05 21:43:04,538 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:43:04,604 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 21:43:04,604 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 23 treesize of output 20 [2022-12-05 21:43:04,721 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-05 21:43:04,721 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1068101663] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:43:04,721 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:43:04,721 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 8] total 25 [2022-12-05 21:43:04,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31337366] [2022-12-05 21:43:04,721 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:43:04,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-12-05 21:43:04,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:43:04,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-12-05 21:43:04,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=610, Unknown=0, NotChecked=0, Total=702 [2022-12-05 21:43:04,723 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 26 [2022-12-05 21:43:04,723 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 363 places, 2558 transitions, 70399 flow. Second operand has 27 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 26 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:43:04,723 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:43:04,723 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 26 [2022-12-05 21:43:04,723 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:43:27,162 INFO L130 PetriNetUnfolder]: 26549/39054 cut-off events. [2022-12-05 21:43:27,162 INFO L131 PetriNetUnfolder]: For 1066472/1066472 co-relation queries the response was YES. [2022-12-05 21:43:27,805 INFO L83 FinitePrefix]: Finished finitePrefix Result has 411226 conditions, 39054 events. 26549/39054 cut-off events. For 1066472/1066472 co-relation queries the response was YES. Maximal size of possible extension queue 1938. Compared 268990 event pairs, 5139 based on Foata normal form. 8/39062 useless extension candidates. Maximal degree in co-relation 410373. Up to 27594 conditions per place. [2022-12-05 21:43:28,156 INFO L137 encePairwiseOnDemand]: 10/26 looper letters, 1635 selfloop transitions, 2065 changer transitions 2/3702 dead transitions. [2022-12-05 21:43:28,156 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 463 places, 3702 transitions, 101823 flow [2022-12-05 21:43:28,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2022-12-05 21:43:28,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2022-12-05 21:43:28,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 636 transitions. [2022-12-05 21:43:28,158 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.2421934501142422 [2022-12-05 21:43:28,158 INFO L175 Difference]: Start difference. First operand has 363 places, 2558 transitions, 70399 flow. Second operand 101 states and 636 transitions. [2022-12-05 21:43:28,159 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 463 places, 3702 transitions, 101823 flow [2022-12-05 21:43:58,537 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 461 places, 3702 transitions, 100860 flow, removed 346 selfloop flow, removed 2 redundant places. [2022-12-05 21:43:58,606 INFO L231 Difference]: Finished difference. Result has 493 places, 3361 transitions, 96196 flow [2022-12-05 21:43:58,607 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=69679, PETRI_DIFFERENCE_MINUEND_PLACES=361, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2558, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1356, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1050, PETRI_DIFFERENCE_SUBTRAHEND_STATES=101, PETRI_FLOW=96196, PETRI_PLACES=493, PETRI_TRANSITIONS=3361} [2022-12-05 21:43:58,608 INFO L294 CegarLoopForPetriNet]: 32 programPoint places, 461 predicate places. [2022-12-05 21:43:58,608 INFO L495 AbstractCegarLoop]: Abstraction has has 493 places, 3361 transitions, 96196 flow [2022-12-05 21:43:58,608 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 26 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:43:58,608 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:43:58,608 INFO L213 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] [2022-12-05 21:43:58,616 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-12-05 21:43:58,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:43:58,814 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-05 21:43:58,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:43:58,814 INFO L85 PathProgramCache]: Analyzing trace with hash -1474407054, now seen corresponding path program 6 times [2022-12-05 21:43:58,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:43:58,814 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210209267] [2022-12-05 21:43:58,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:43:58,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:43:58,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:43:59,396 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:43:59,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:43:59,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210209267] [2022-12-05 21:43:59,397 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210209267] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:43:59,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080660299] [2022-12-05 21:43:59,397 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-05 21:43:59,397 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:43:59,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:43:59,398 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 21:43:59,432 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-12-05 21:43:59,510 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-12-05 21:43:59,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:43:59,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 56 conjunts are in the unsatisfiable core [2022-12-05 21:43:59,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:43:59,621 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 21:43:59,621 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 17 treesize of output 17 [2022-12-05 21:43:59,666 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-05 21:43:59,667 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:43:59,738 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 21:43:59,739 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 23 treesize of output 20 [2022-12-05 21:43:59,824 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-05 21:43:59,825 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2080660299] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:43:59,825 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:43:59,825 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 8] total 25 [2022-12-05 21:43:59,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539140840] [2022-12-05 21:43:59,825 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:43:59,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-12-05 21:43:59,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:43:59,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-12-05 21:43:59,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=584, Unknown=0, NotChecked=0, Total=702 [2022-12-05 21:43:59,826 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 26 [2022-12-05 21:43:59,826 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 493 places, 3361 transitions, 96196 flow. Second operand has 27 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:43:59,826 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:43:59,826 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 26 [2022-12-05 21:43:59,826 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:44:31,484 INFO L130 PetriNetUnfolder]: 31323/46182 cut-off events. [2022-12-05 21:44:31,484 INFO L131 PetriNetUnfolder]: For 1423667/1423667 co-relation queries the response was YES. [2022-12-05 21:44:32,392 INFO L83 FinitePrefix]: Finished finitePrefix Result has 510868 conditions, 46182 events. 31323/46182 cut-off events. For 1423667/1423667 co-relation queries the response was YES. Maximal size of possible extension queue 2326. Compared 325603 event pairs, 4519 based on Foata normal form. 11/46193 useless extension candidates. Maximal degree in co-relation 509507. Up to 26887 conditions per place. [2022-12-05 21:44:32,806 INFO L137 encePairwiseOnDemand]: 12/26 looper letters, 1389 selfloop transitions, 3149 changer transitions 7/4545 dead transitions. [2022-12-05 21:44:32,806 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 566 places, 4545 transitions, 133098 flow [2022-12-05 21:44:32,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-12-05 21:44:32,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2022-12-05 21:44:32,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 516 transitions. [2022-12-05 21:44:32,814 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.2681912681912682 [2022-12-05 21:44:32,814 INFO L175 Difference]: Start difference. First operand has 493 places, 3361 transitions, 96196 flow. Second operand 74 states and 516 transitions. [2022-12-05 21:44:32,814 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 566 places, 4545 transitions, 133098 flow [2022-12-05 21:45:16,545 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 555 places, 4545 transitions, 129835 flow, removed 1303 selfloop flow, removed 11 redundant places. [2022-12-05 21:45:16,635 INFO L231 Difference]: Finished difference. Result has 577 places, 4235 transitions, 128722 flow [2022-12-05 21:45:16,637 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=93665, PETRI_DIFFERENCE_MINUEND_PLACES=482, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3361, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2355, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=879, PETRI_DIFFERENCE_SUBTRAHEND_STATES=74, PETRI_FLOW=128722, PETRI_PLACES=577, PETRI_TRANSITIONS=4235} [2022-12-05 21:45:16,637 INFO L294 CegarLoopForPetriNet]: 32 programPoint places, 545 predicate places. [2022-12-05 21:45:16,637 INFO L495 AbstractCegarLoop]: Abstraction has has 577 places, 4235 transitions, 128722 flow [2022-12-05 21:45:16,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:45:16,638 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:45:16,638 INFO L213 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] [2022-12-05 21:45:16,644 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-12-05 21:45:16,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:45:16,843 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-05 21:45:16,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:45:16,843 INFO L85 PathProgramCache]: Analyzing trace with hash -1567981630, now seen corresponding path program 6 times [2022-12-05 21:45:16,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:45:16,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313643800] [2022-12-05 21:45:16,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:45:16,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:45:16,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:45:17,125 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-05 21:45:17,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:45:17,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313643800] [2022-12-05 21:45:17,126 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313643800] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:45:17,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [58963067] [2022-12-05 21:45:17,126 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-05 21:45:17,126 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:45:17,126 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:45:17,141 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 21:45:17,144 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-12-05 21:45:17,243 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-12-05 21:45:17,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:45:17,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 52 conjunts are in the unsatisfiable core [2022-12-05 21:45:17,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:45:17,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-05 21:45:17,353 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 14 treesize of output 16 [2022-12-05 21:45:17,367 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-05 21:45:17,382 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-05 21:45:17,382 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:45:17,407 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_938 (Array Int Int))) (= (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_938) c_~A~0.base) (+ (* |c_thread2Thread1of1ForFork2_~i~1#1| 4) c_~A~0.offset)) c_~res2~0) c_~res1~0)) is different from false [2022-12-05 21:45:17,414 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 21:45:17,414 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 54 treesize of output 42 [2022-12-05 21:45:17,417 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 17 treesize of output 11 [2022-12-05 21:45:17,478 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 1 not checked. [2022-12-05 21:45:17,478 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [58963067] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:45:17,478 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:45:17,478 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2022-12-05 21:45:17,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064639164] [2022-12-05 21:45:17,478 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:45:17,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-12-05 21:45:17,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:45:17,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-12-05 21:45:17,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=335, Unknown=1, NotChecked=38, Total=462 [2022-12-05 21:45:17,479 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 26 [2022-12-05 21:45:17,479 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 577 places, 4235 transitions, 128722 flow. Second operand has 22 states, 22 states have (on average 3.227272727272727) internal successors, (71), 22 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:45:17,479 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:45:17,480 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 26 [2022-12-05 21:45:17,480 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:45:56,149 INFO L130 PetriNetUnfolder]: 32303/47568 cut-off events. [2022-12-05 21:45:56,149 INFO L131 PetriNetUnfolder]: For 1856991/1858093 co-relation queries the response was YES. [2022-12-05 21:45:57,221 INFO L83 FinitePrefix]: Finished finitePrefix Result has 569740 conditions, 47568 events. 32303/47568 cut-off events. For 1856991/1858093 co-relation queries the response was YES. Maximal size of possible extension queue 2490. Compared 339345 event pairs, 7473 based on Foata normal form. 887/47889 useless extension candidates. Maximal degree in co-relation 568422. Up to 39921 conditions per place. [2022-12-05 21:45:57,618 INFO L137 encePairwiseOnDemand]: 18/26 looper letters, 3581 selfloop transitions, 962 changer transitions 2/4610 dead transitions. [2022-12-05 21:45:57,618 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 589 places, 4610 transitions, 147770 flow [2022-12-05 21:45:57,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-05 21:45:57,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-12-05 21:45:57,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 173 transitions. [2022-12-05 21:45:57,619 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.5118343195266272 [2022-12-05 21:45:57,619 INFO L175 Difference]: Start difference. First operand has 577 places, 4235 transitions, 128722 flow. Second operand 13 states and 173 transitions. [2022-12-05 21:45:57,619 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 589 places, 4610 transitions, 147770 flow [2022-12-05 21:46:55,510 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 583 places, 4610 transitions, 145191 flow, removed 1253 selfloop flow, removed 6 redundant places. [2022-12-05 21:46:55,606 INFO L231 Difference]: Finished difference. Result has 591 places, 4397 transitions, 134677 flow [2022-12-05 21:46:55,608 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=126203, PETRI_DIFFERENCE_MINUEND_PLACES=571, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=819, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=3323, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=134677, PETRI_PLACES=591, PETRI_TRANSITIONS=4397} [2022-12-05 21:46:55,609 INFO L294 CegarLoopForPetriNet]: 32 programPoint places, 559 predicate places. [2022-12-05 21:46:55,609 INFO L495 AbstractCegarLoop]: Abstraction has has 591 places, 4397 transitions, 134677 flow [2022-12-05 21:46:55,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.227272727272727) internal successors, (71), 22 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:46:55,609 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:46:55,609 INFO L213 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] [2022-12-05 21:46:55,618 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-12-05 21:46:55,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:46:55,815 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-05 21:46:55,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:46:55,815 INFO L85 PathProgramCache]: Analyzing trace with hash 1178748944, now seen corresponding path program 7 times [2022-12-05 21:46:55,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:46:55,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535335378] [2022-12-05 21:46:55,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:46:55,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:46:55,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:46:56,109 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-05 21:46:56,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:46:56,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535335378] [2022-12-05 21:46:56,110 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535335378] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:46:56,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720124279] [2022-12-05 21:46:56,111 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-05 21:46:56,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:46:56,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:46:56,112 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 21:46:56,114 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-12-05 21:46:56,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:46:56,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 62 conjunts are in the unsatisfiable core [2022-12-05 21:46:56,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:46:56,273 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 11 treesize of output 7 [2022-12-05 21:46:56,296 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 [2022-12-05 21:46:56,323 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 [2022-12-05 21:46:56,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-05 21:46:56,414 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 14 treesize of output 16 [2022-12-05 21:46:56,462 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2022-12-05 21:46:56,476 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:46:56,476 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:46:56,538 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_987 (Array Int Int))) (= (+ c_~res2~0 (select (select |c_#memory_int| c_~A~0.base) (+ (* |c_thread2Thread1of1ForFork2_~i~1#1| 4) c_~A~0.offset))) (+ c_~res1~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_987) c_~A~0.base) (+ (* |c_thread1Thread1of1ForFork1_~i~0#1| 4) c_~A~0.offset))))) is different from false [2022-12-05 21:46:56,584 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_986 (Array Int Int)) (v_ArrVal_987 (Array Int Int))) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_986))) (= (+ (select (select .cse0 c_~A~0.base) c_~A~0.offset) c_~res2~0) (+ c_~res1~0 (select (select (store .cse0 |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_987) c_~A~0.base) c_~A~0.offset))))) is different from false [2022-12-05 21:46:56,634 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 21:46:56,634 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 54 treesize of output 43 [2022-12-05 21:46:56,637 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 634 treesize of output 594 [2022-12-05 21:46:56,642 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 594 treesize of output 562 [2022-12-05 21:46:56,650 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 562 treesize of output 530 [2022-12-05 21:46:56,655 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 530 treesize of output 510 [2022-12-05 21:46:58,868 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 1 times theorem prover too weak. 0 trivial. 1 not checked. [2022-12-05 21:46:58,868 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1720124279] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:46:58,868 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:46:58,868 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 25 [2022-12-05 21:46:58,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100762671] [2022-12-05 21:46:58,868 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:46:58,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-12-05 21:46:58,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:46:58,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-12-05 21:46:58,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=478, Unknown=22, NotChecked=94, Total=702 [2022-12-05 21:46:58,869 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 26 [2022-12-05 21:46:58,870 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 591 places, 4397 transitions, 134677 flow. Second operand has 27 states, 27 states have (on average 2.814814814814815) internal successors, (76), 27 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:46:58,870 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:46:58,870 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 26 [2022-12-05 21:46:58,870 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:47:41,264 INFO L130 PetriNetUnfolder]: 33459/49259 cut-off events. [2022-12-05 21:47:41,265 INFO L131 PetriNetUnfolder]: For 1939602/1940751 co-relation queries the response was YES. [2022-12-05 21:47:42,477 INFO L83 FinitePrefix]: Finished finitePrefix Result has 591075 conditions, 49259 events. 33459/49259 cut-off events. For 1939602/1940751 co-relation queries the response was YES. Maximal size of possible extension queue 2613. Compared 353888 event pairs, 8776 based on Foata normal form. 909/49513 useless extension candidates. Maximal degree in co-relation 589812. Up to 44082 conditions per place. [2022-12-05 21:47:42,784 INFO L137 encePairwiseOnDemand]: 11/26 looper letters, 3666 selfloop transitions, 1013 changer transitions 1/4745 dead transitions. [2022-12-05 21:47:42,785 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 604 places, 4745 transitions, 153251 flow [2022-12-05 21:47:42,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-05 21:47:42,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-12-05 21:47:42,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 150 transitions. [2022-12-05 21:47:42,786 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.41208791208791207 [2022-12-05 21:47:42,786 INFO L175 Difference]: Start difference. First operand has 591 places, 4397 transitions, 134677 flow. Second operand 14 states and 150 transitions. [2022-12-05 21:47:42,786 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 604 places, 4745 transitions, 153251 flow [2022-12-05 21:48:40,239 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 601 places, 4745 transitions, 151998 flow, removed 366 selfloop flow, removed 3 redundant places. [2022-12-05 21:48:40,336 INFO L231 Difference]: Finished difference. Result has 607 places, 4595 transitions, 142313 flow [2022-12-05 21:48:40,339 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=133445, PETRI_DIFFERENCE_MINUEND_PLACES=588, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4397, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=835, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=3447, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=142313, PETRI_PLACES=607, PETRI_TRANSITIONS=4595} [2022-12-05 21:48:40,339 INFO L294 CegarLoopForPetriNet]: 32 programPoint places, 575 predicate places. [2022-12-05 21:48:40,339 INFO L495 AbstractCegarLoop]: Abstraction has has 607 places, 4595 transitions, 142313 flow [2022-12-05 21:48:40,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.814814814814815) internal successors, (76), 27 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:48:40,340 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:48:40,340 INFO L213 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] [2022-12-05 21:48:40,344 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-12-05 21:48:40,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-12-05 21:48:40,544 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-05 21:48:40,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:48:40,545 INFO L85 PathProgramCache]: Analyzing trace with hash 1609650686, now seen corresponding path program 7 times [2022-12-05 21:48:40,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:48:40,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002501040] [2022-12-05 21:48:40,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:48:40,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:48:40,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:48:41,008 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:48:41,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:48:41,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002501040] [2022-12-05 21:48:41,009 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002501040] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:48:41,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712170676] [2022-12-05 21:48:41,009 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-05 21:48:41,009 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:48:41,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:48:41,011 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 21:48:41,012 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-12-05 21:48:41,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:48:41,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 71 conjunts are in the unsatisfiable core [2022-12-05 21:48:41,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:48:41,158 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 11 treesize of output 7 [2022-12-05 21:48:41,198 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 [2022-12-05 21:48:41,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-05 21:48:41,299 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 14 treesize of output 16 [2022-12-05 21:48:41,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-05 21:48:41,351 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 14 treesize of output 16 [2022-12-05 21:48:41,411 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-05 21:48:41,413 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 21:48:41,413 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 17 treesize of output 10 [2022-12-05 21:48:41,434 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:48:41,434 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:48:41,713 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 21:48:41,714 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 55 treesize of output 44 [2022-12-05 21:48:41,724 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 21:48:41,725 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 3350 treesize of output 2976 [2022-12-05 21:48:41,743 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 21:48:41,743 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 2966 treesize of output 2752 [2022-12-05 21:48:41,757 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 2742 treesize of output 2550 [2022-12-05 21:48:41,769 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 2550 treesize of output 2166 Received shutdown request... [2022-12-05 21:54:02,909 WARN L249 SmtUtils]: Removed 2 from assertion stack [2022-12-05 21:54:02,909 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 [2022-12-05 21:54:02,910 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 4 remaining) [2022-12-05 21:54:02,915 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-12-05 21:54:02,937 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-12-05 21:54:03,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-12-05 21:54:03,114 WARN L619 AbstractCegarLoop]: Verification canceled: while CegarLoopForPetriNet was analyzing trace of length 25 with TraceHistMax 1,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 7 for 6ms.. [2022-12-05 21:54:03,115 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 4 remaining) [2022-12-05 21:54:03,115 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2022-12-05 21:54:03,115 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2022-12-05 21:54:03,116 INFO L458 BasicCegarLoop]: Path program histogram: [7, 7, 6, 1, 1, 1, 1, 1] [2022-12-05 21:54:03,119 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-12-05 21:54:03,119 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-12-05 21:54:03,139 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.12 09:54:03 BasicIcfg [2022-12-05 21:54:03,139 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-12-05 21:54:03,140 INFO L158 Benchmark]: Toolchain (without parser) took 836579.31ms. Allocated memory was 199.2MB in the beginning and 5.5GB in the end (delta: 5.3GB). Free memory was 174.7MB in the beginning and 1.3GB in the end (delta: -1.1GB). Peak memory consumption was 4.9GB. Max. memory is 8.0GB. [2022-12-05 21:54:03,140 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 199.2MB. Free memory is still 176.4MB. There was no memory consumed. Max. memory is 8.0GB. [2022-12-05 21:54:03,140 INFO L158 Benchmark]: CACSL2BoogieTranslator took 225.24ms. Allocated memory is still 199.2MB. Free memory was 174.7MB in the beginning and 161.6MB in the end (delta: 13.1MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. [2022-12-05 21:54:03,140 INFO L158 Benchmark]: Boogie Procedure Inliner took 41.82ms. Allocated memory is still 199.2MB. Free memory was 161.6MB in the beginning and 159.5MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-12-05 21:54:03,140 INFO L158 Benchmark]: Boogie Preprocessor took 32.20ms. Allocated memory is still 199.2MB. Free memory was 159.5MB in the beginning and 157.4MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-12-05 21:54:03,140 INFO L158 Benchmark]: RCFGBuilder took 579.56ms. Allocated memory is still 199.2MB. Free memory was 157.4MB in the beginning and 125.9MB in the end (delta: 31.5MB). Peak memory consumption was 31.5MB. Max. memory is 8.0GB. [2022-12-05 21:54:03,140 INFO L158 Benchmark]: TraceAbstraction took 835695.42ms. Allocated memory was 199.2MB in the beginning and 5.5GB in the end (delta: 5.3GB). Free memory was 125.4MB in the beginning and 1.3GB in the end (delta: -1.2GB). Peak memory consumption was 4.9GB. Max. memory is 8.0GB. [2022-12-05 21:54:03,142 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13ms. Allocated memory is still 199.2MB. Free memory is still 176.4MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 225.24ms. Allocated memory is still 199.2MB. Free memory was 174.7MB in the beginning and 161.6MB in the end (delta: 13.1MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 41.82ms. Allocated memory is still 199.2MB. Free memory was 161.6MB in the beginning and 159.5MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 32.20ms. Allocated memory is still 199.2MB. Free memory was 159.5MB in the beginning and 157.4MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 579.56ms. Allocated memory is still 199.2MB. Free memory was 157.4MB in the beginning and 125.9MB in the end (delta: 31.5MB). Peak memory consumption was 31.5MB. Max. memory is 8.0GB. * TraceAbstraction took 835695.42ms. Allocated memory was 199.2MB in the beginning and 5.5GB in the end (delta: 5.3GB). Free memory was 125.4MB in the beginning and 1.3GB in the end (delta: -1.2GB). Peak memory consumption was 4.9GB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 4.6s, 129 PlacesBefore, 32 PlacesAfterwards, 131 TransitionsBefore, 26 TransitionsAfterwards, 1518 CoEnabledTransitionPairs, 3 FixpointIterations, 0 TrivialSequentialCompositions, 0 ConcurrentSequentialCompositions, 66 TrivialYvCompositions, 31 ConcurrentYvCompositions, 8 ChoiceCompositions, 105 TotalNumberOfCompositions, Independence Relation Statistics: ConditionTransformingIndependenceRelation.Independence Queries: [ total: 833, independent: 815, independent conditional: 815, independent unconditional: 0, dependent: 18, dependent conditional: 18, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ConditionTransformingIndependenceRelation.Statistics on underlying relation: DisjunctiveConditionalIndependenceRelation.Independence Queries: [ total: 833, independent: 815, independent conditional: 0, independent unconditional: 815, dependent: 18, dependent conditional: 0, dependent unconditional: 18, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , DisjunctiveConditionalIndependenceRelation.Statistics on underlying relation: SemanticConditionEliminator.Independence Queries: [ total: 833, independent: 815, independent conditional: 0, independent unconditional: 815, dependent: 18, dependent conditional: 0, dependent unconditional: 18, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticConditionEliminator.Statistics on underlying relation: CachedIndependenceRelation.Independence Queries: [ total: 833, independent: 815, independent conditional: 0, independent unconditional: 815, dependent: 18, dependent conditional: 0, dependent unconditional: 18, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 785, independent: 775, independent conditional: 0, independent unconditional: 775, dependent: 10, dependent conditional: 0, dependent unconditional: 10, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 785, independent: 775, independent conditional: 0, independent unconditional: 775, dependent: 10, dependent conditional: 0, dependent unconditional: 10, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 10, independent: 0, independent conditional: 0, independent unconditional: 0, dependent: 10, dependent conditional: 0, dependent unconditional: 10, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 24, independent: 0, independent conditional: 0, independent unconditional: 0, dependent: 24, dependent conditional: 0, dependent unconditional: 24, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 833, independent: 40, independent conditional: 0, independent unconditional: 40, dependent: 8, dependent conditional: 0, dependent unconditional: 8, unknown: 785, unknown conditional: 0, unknown unconditional: 785] , Statistics on independence cache: Total cache size (in pairs): 1250, Positive cache size: 1240, Positive conditional cache size: 0, Positive unconditional cache size: 1240, Negative cache size: 10, Negative conditional cache size: 0, Negative unconditional cache size: 10, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0, Eliminated conditions: 0, Maximal queried relation: -1 - TimeoutResultAtElement [Line: 104]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while CegarLoopForPetriNet was analyzing trace of length 25 with TraceHistMax 1,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 7 for 6ms.. - TimeoutResultAtElement [Line: 97]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while CegarLoopForPetriNet was analyzing trace of length 25 with TraceHistMax 1,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 7 for 6ms.. - TimeoutResultAtElement [Line: 96]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while CegarLoopForPetriNet was analyzing trace of length 25 with TraceHistMax 1,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 7 for 6ms.. - TimeoutResultAtElement [Line: 98]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while CegarLoopForPetriNet was analyzing trace of length 25 with TraceHistMax 1,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 7 for 6ms.. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 166 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: 835.6s, OverallIterations: 25, TraceHistogramMax: 1, PathProgramHistogramMax: 7, EmptinessCheckTime: 0.0s, AutomataDifference: 487.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 4.7s, HoareTripleCheckerStatistics: 10 mSolverCounterUnknown, 4209 SdHoareTripleChecker+Valid, 8.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 4209 mSDsluCounter, 723 SdHoareTripleChecker+Invalid, 7.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 313 IncrementalHoareTripleChecker+Unchecked, 617 mSDsCounter, 247 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 17974 IncrementalHoareTripleChecker+Invalid, 18544 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 247 mSolverCounterUnsat, 106 mSDtfsCounter, 17974 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1434 GetRequests, 679 SyntacticMatches, 28 SemanticMatches, 727 ConstructedPredicates, 4 IntricatePredicates, 1 DeprecatedPredicates, 12418 ImplicationChecksByTransitivity, 13.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=142313occurred in iteration=24, InterpolantAutomatonStates: 510, 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, 1.1s SatisfiabilityAnalysisTime, 13.6s InterpolantComputationTime, 1019 NumberOfCodeBlocks, 1019 NumberOfCodeBlocksAsserted, 60 NumberOfCheckSat, 1422 ConstructedInterpolants, 32 QuantifiedInterpolants, 12181 SizeOfPredicates, 393 NumberOfNonLiveVariables, 4959 ConjunctsInSsa, 801 ConjunctsInUnsatCore, 64 InterpolantComputations, 10 PerfectInterpolantSequences, 53/162 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