/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-bad-threaded-sum-2.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.repeated-lipton-8d0d62b [2022-12-05 21:27:26,346 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-05 21:27:26,348 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-05 21:27:26,376 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-05 21:27:26,378 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-05 21:27:26,380 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-05 21:27:26,382 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-05 21:27:26,385 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-05 21:27:26,388 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-05 21:27:26,392 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-05 21:27:26,392 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-05 21:27:26,394 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-05 21:27:26,394 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-05 21:27:26,396 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-05 21:27:26,396 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-05 21:27:26,399 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-05 21:27:26,399 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-05 21:27:26,400 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-05 21:27:26,402 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-05 21:27:26,405 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-05 21:27:26,406 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-05 21:27:26,406 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-05 21:27:26,407 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-05 21:27:26,408 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-05 21:27:26,412 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-05 21:27:26,413 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-05 21:27:26,413 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-05 21:27:26,414 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-05 21:27:26,414 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-05 21:27:26,415 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-05 21:27:26,415 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-05 21:27:26,419 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-05 21:27:26,420 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-05 21:27:26,420 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-05 21:27:26,421 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-05 21:27:26,421 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-05 21:27:26,440 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-05 21:27:26,440 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-05 21:27:26,440 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-05 21:27:26,440 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-05 21:27:26,441 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-05 21:27:26,444 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 21:27:26,461 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-05 21:27:26,461 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-05 21:27:26,462 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-05 21:27:26,462 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-05 21:27:26,462 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-05 21:27:26,462 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-05 21:27:26,462 INFO L138 SettingsManager]: * Use SBE=true [2022-12-05 21:27:26,462 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-05 21:27:26,463 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-05 21:27:26,463 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-05 21:27:26,463 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-05 21:27:26,463 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-05 21:27:26,463 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-05 21:27:26,463 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-05 21:27:26,463 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-05 21:27:26,463 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-05 21:27:26,463 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-05 21:27:26,463 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-05 21:27:26,464 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-05 21:27:26,464 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-05 21:27:26,464 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-05 21:27:26,464 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-12-05 21:27:26,464 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-05 21:27:26,464 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-05 21:27:26,464 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-05 21:27:26,464 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-05 21:27:26,464 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-05 21:27:26,464 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-05 21:27:26,465 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-05 21:27:26,465 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-05 21:27:26,465 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-12-05 21:27:26,688 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-05 21:27:26,702 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-05 21:27:26,704 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-05 21:27:26,704 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-05 21:27:26,705 INFO L275 PluginConnector]: CDTParser initialized [2022-12-05 21:27:26,706 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-bad-threaded-sum-2.wvr.c [2022-12-05 21:27:27,640 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-05 21:27:27,801 INFO L351 CDTParser]: Found 1 translation units. [2022-12-05 21:27:27,802 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-threaded-sum-2.wvr.c [2022-12-05 21:27:27,807 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6d6c6640a/fffecf1b7216474ab6dfde3ddcca1b10/FLAGff05727b0 [2022-12-05 21:27:27,826 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6d6c6640a/fffecf1b7216474ab6dfde3ddcca1b10 [2022-12-05 21:27:27,828 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-05 21:27:27,829 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-12-05 21:27:27,830 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-05 21:27:27,830 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-05 21:27:27,832 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-05 21:27:27,833 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.12 09:27:27" (1/1) ... [2022-12-05 21:27:27,834 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@59109259 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:27:27, skipping insertion in model container [2022-12-05 21:27:27,834 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.12 09:27:27" (1/1) ... [2022-12-05 21:27:27,838 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-05 21:27:27,854 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-05 21:27:27,973 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 21:27:27,975 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 21:27:27,975 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 21:27:27,978 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 21:27:27,978 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 21:27:27,979 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 21:27:27,981 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 21:27:27,982 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 21:27:27,983 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 21:27:27,983 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 21:27:27,983 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 21:27:27,984 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 21:27:27,984 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 21:27:27,984 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 21:27:27,996 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-bad-threaded-sum-2.wvr.c[2476,2489] [2022-12-05 21:27:27,999 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-05 21:27:28,009 INFO L203 MainTranslator]: Completed pre-run [2022-12-05 21:27:28,020 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 21:27:28,021 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 21:27:28,021 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 21:27:28,022 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 21:27:28,023 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 21:27:28,024 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 21:27:28,026 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 21:27:28,026 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 21:27:28,027 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 21:27:28,027 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 21:27:28,028 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 21:27:28,030 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 21:27:28,030 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 21:27:28,031 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 21:27:28,042 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-bad-threaded-sum-2.wvr.c[2476,2489] [2022-12-05 21:27:28,043 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-05 21:27:28,053 INFO L208 MainTranslator]: Completed translation [2022-12-05 21:27:28,053 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:27:28 WrapperNode [2022-12-05 21:27:28,054 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-05 21:27:28,055 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-05 21:27:28,055 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-05 21:27:28,056 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-05 21:27:28,060 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:27:28" (1/1) ... [2022-12-05 21:27:28,072 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:27:28" (1/1) ... [2022-12-05 21:27:28,089 INFO L138 Inliner]: procedures = 21, calls = 34, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 59 [2022-12-05 21:27:28,089 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-05 21:27:28,090 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-05 21:27:28,090 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-05 21:27:28,090 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-05 21:27:28,096 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:27:28" (1/1) ... [2022-12-05 21:27:28,096 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:27:28" (1/1) ... [2022-12-05 21:27:28,100 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:27:28" (1/1) ... [2022-12-05 21:27:28,100 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:27:28" (1/1) ... [2022-12-05 21:27:28,113 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:27:28" (1/1) ... [2022-12-05 21:27:28,115 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:27:28" (1/1) ... [2022-12-05 21:27:28,116 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:27:28" (1/1) ... [2022-12-05 21:27:28,116 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:27:28" (1/1) ... [2022-12-05 21:27:28,117 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-05 21:27:28,118 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-05 21:27:28,118 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-05 21:27:28,118 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-05 21:27:28,119 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:27:28" (1/1) ... [2022-12-05 21:27:28,122 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-05 21:27:28,131 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:27:28,140 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 21:27:28,159 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 21:27:28,169 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-05 21:27:28,170 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-12-05 21:27:28,170 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-12-05 21:27:28,170 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-12-05 21:27:28,170 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-12-05 21:27:28,170 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-05 21:27:28,170 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-05 21:27:28,170 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-05 21:27:28,170 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-12-05 21:27:28,170 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-12-05 21:27:28,170 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-05 21:27:28,170 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-05 21:27:28,170 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-05 21:27:28,170 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-05 21:27:28,171 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 21:27:28,248 INFO L236 CfgBuilder]: Building ICFG [2022-12-05 21:27:28,249 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-05 21:27:28,381 INFO L277 CfgBuilder]: Performing block encoding [2022-12-05 21:27:28,409 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-05 21:27:28,409 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2022-12-05 21:27:28,410 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.12 09:27:28 BoogieIcfgContainer [2022-12-05 21:27:28,411 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-05 21:27:28,412 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-05 21:27:28,412 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-05 21:27:28,414 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-05 21:27:28,414 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.12 09:27:27" (1/3) ... [2022-12-05 21:27:28,415 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59240612 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.12 09:27:28, skipping insertion in model container [2022-12-05 21:27:28,415 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:27:28" (2/3) ... [2022-12-05 21:27:28,415 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59240612 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.12 09:27:28, skipping insertion in model container [2022-12-05 21:27:28,415 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.12 09:27:28" (3/3) ... [2022-12-05 21:27:28,416 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-threaded-sum-2.wvr.c [2022-12-05 21:27:28,428 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-05 21:27:28,428 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-05 21:27:28,428 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-05 21:27:28,472 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-12-05 21:27:28,497 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 82 places, 81 transitions, 178 flow [2022-12-05 21:27:28,527 INFO L130 PetriNetUnfolder]: 6/79 cut-off events. [2022-12-05 21:27:28,527 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-05 21:27:28,530 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88 conditions, 79 events. 6/79 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 41 event pairs, 0 based on Foata normal form. 0/72 useless extension candidates. Maximal degree in co-relation 47. Up to 2 conditions per place. [2022-12-05 21:27:28,530 INFO L82 GeneralOperation]: Start removeDead. Operand has 82 places, 81 transitions, 178 flow [2022-12-05 21:27:28,533 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 72 places, 71 transitions, 154 flow [2022-12-05 21:27:28,534 INFO L195 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-05 21:27:28,546 INFO L167 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 72 places, 71 transitions, 154 flow [2022-12-05 21:27:28,549 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 72 places, 71 transitions, 154 flow [2022-12-05 21:27:28,579 INFO L130 PetriNetUnfolder]: 6/71 cut-off events. [2022-12-05 21:27:28,579 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-05 21:27:28,580 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80 conditions, 71 events. 6/71 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 40 event pairs, 0 based on Foata normal form. 0/65 useless extension candidates. Maximal degree in co-relation 47. Up to 2 conditions per place. [2022-12-05 21:27:28,581 INFO L184 LiptonReduction]: Starting Lipton reduction on Petri net that has 72 places, 71 transitions, 154 flow [2022-12-05 21:27:28,581 INFO L188 LiptonReduction]: Number of co-enabled transitions 396 [2022-12-05 21:27:30,662 INFO L203 LiptonReduction]: Total number of compositions: 54 [2022-12-05 21:27:30,673 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-05 21:27:30,677 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;@79b36973, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, Conditionality=CONDITIONAL_DISJUNCTIVE, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-05 21:27:30,677 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-12-05 21:27:30,681 INFO L130 PetriNetUnfolder]: 2/16 cut-off events. [2022-12-05 21:27:30,681 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-05 21:27:30,681 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:27:30,682 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:27:30,682 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:27:30,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:27:30,685 INFO L85 PathProgramCache]: Analyzing trace with hash 1895754169, now seen corresponding path program 1 times [2022-12-05 21:27:30,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:27:30,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903853745] [2022-12-05 21:27:30,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:27:30,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:27:30,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:27:31,065 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 21:27:31,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:27:31,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903853745] [2022-12-05 21:27:31,066 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903853745] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-05 21:27:31,066 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-05 21:27:31,066 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-05 21:27:31,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481070213] [2022-12-05 21:27:31,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 21:27:31,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-05 21:27:31,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:27:31,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-05 21:27:31,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-05 21:27:31,086 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 17 [2022-12-05 21:27:31,087 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 17 transitions, 46 flow. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 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 21:27:31,087 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:27:31,087 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 17 [2022-12-05 21:27:31,088 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:27:31,174 INFO L130 PetriNetUnfolder]: 93/164 cut-off events. [2022-12-05 21:27:31,174 INFO L131 PetriNetUnfolder]: For 20/20 co-relation queries the response was YES. [2022-12-05 21:27:31,175 INFO L83 FinitePrefix]: Finished finitePrefix Result has 349 conditions, 164 events. 93/164 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 435 event pairs, 9 based on Foata normal form. 0/140 useless extension candidates. Maximal degree in co-relation 280. Up to 85 conditions per place. [2022-12-05 21:27:31,177 INFO L137 encePairwiseOnDemand]: 13/17 looper letters, 30 selfloop transitions, 3 changer transitions 0/33 dead transitions. [2022-12-05 21:27:31,177 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 33 transitions, 150 flow [2022-12-05 21:27:31,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-05 21:27:31,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-05 21:27:31,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 34 transitions. [2022-12-05 21:27:31,186 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.5 [2022-12-05 21:27:31,187 INFO L175 Difference]: Start difference. First operand has 22 places, 17 transitions, 46 flow. Second operand 4 states and 34 transitions. [2022-12-05 21:27:31,188 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 33 transitions, 150 flow [2022-12-05 21:27:31,190 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 33 transitions, 138 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-12-05 21:27:31,191 INFO L231 Difference]: Finished difference. Result has 22 places, 18 transitions, 52 flow [2022-12-05 21:27:31,193 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=17, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=52, PETRI_PLACES=22, PETRI_TRANSITIONS=18} [2022-12-05 21:27:31,196 INFO L294 CegarLoopForPetriNet]: 22 programPoint places, 0 predicate places. [2022-12-05 21:27:31,197 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 18 transitions, 52 flow [2022-12-05 21:27:31,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 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 21:27:31,197 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:27:31,197 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:27:31,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-05 21:27:31,197 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:27:31,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:27:31,198 INFO L85 PathProgramCache]: Analyzing trace with hash -1814883146, now seen corresponding path program 1 times [2022-12-05 21:27:31,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:27:31,198 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651862543] [2022-12-05 21:27:31,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:27:31,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:27:31,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:27:31,357 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-05 21:27:31,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:27:31,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651862543] [2022-12-05 21:27:31,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651862543] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-05 21:27:31,357 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-05 21:27:31,357 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-05 21:27:31,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110461802] [2022-12-05 21:27:31,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 21:27:31,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-05 21:27:31,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:27:31,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-05 21:27:31,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-05 21:27:31,359 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 17 [2022-12-05 21:27:31,359 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 18 transitions, 52 flow. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 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 21:27:31,359 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:27:31,359 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 17 [2022-12-05 21:27:31,359 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:27:31,438 INFO L130 PetriNetUnfolder]: 76/133 cut-off events. [2022-12-05 21:27:31,438 INFO L131 PetriNetUnfolder]: For 28/28 co-relation queries the response was YES. [2022-12-05 21:27:31,438 INFO L83 FinitePrefix]: Finished finitePrefix Result has 313 conditions, 133 events. 76/133 cut-off events. For 28/28 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 311 event pairs, 10 based on Foata normal form. 0/127 useless extension candidates. Maximal degree in co-relation 101. Up to 81 conditions per place. [2022-12-05 21:27:31,439 INFO L137 encePairwiseOnDemand]: 13/17 looper letters, 25 selfloop transitions, 4 changer transitions 0/29 dead transitions. [2022-12-05 21:27:31,439 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 29 transitions, 139 flow [2022-12-05 21:27:31,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-05 21:27:31,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-05 21:27:31,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 30 transitions. [2022-12-05 21:27:31,441 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.4411764705882353 [2022-12-05 21:27:31,441 INFO L175 Difference]: Start difference. First operand has 22 places, 18 transitions, 52 flow. Second operand 4 states and 30 transitions. [2022-12-05 21:27:31,441 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 29 transitions, 139 flow [2022-12-05 21:27:31,441 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 29 transitions, 133 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-05 21:27:31,442 INFO L231 Difference]: Finished difference. Result has 25 places, 20 transitions, 71 flow [2022-12-05 21:27:31,442 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=17, PETRI_DIFFERENCE_MINUEND_FLOW=48, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=71, PETRI_PLACES=25, PETRI_TRANSITIONS=20} [2022-12-05 21:27:31,443 INFO L294 CegarLoopForPetriNet]: 22 programPoint places, 3 predicate places. [2022-12-05 21:27:31,443 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 20 transitions, 71 flow [2022-12-05 21:27:31,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 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 21:27:31,443 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:27:31,443 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:27:31,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-05 21:27:31,443 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:27:31,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:27:31,444 INFO L85 PathProgramCache]: Analyzing trace with hash -1774834238, now seen corresponding path program 2 times [2022-12-05 21:27:31,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:27:31,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237144390] [2022-12-05 21:27:31,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:27:31,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:27:31,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:27:31,532 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:27:31,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:27:31,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237144390] [2022-12-05 21:27:31,533 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237144390] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:27:31,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747314474] [2022-12-05 21:27:31,533 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-05 21:27:31,533 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:27:31,533 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:27:31,536 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 21:27:31,541 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 21:27:31,598 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-05 21:27:31,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:27:31,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-05 21:27:31,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:27:31,733 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:27:31,734 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:27:31,820 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:27:31,820 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1747314474] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:27:31,820 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:27:31,821 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4, 5] total 8 [2022-12-05 21:27:31,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300408437] [2022-12-05 21:27:31,822 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:27:31,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-05 21:27:31,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:27:31,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-05 21:27:31,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-12-05 21:27:31,823 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 17 [2022-12-05 21:27:31,823 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 20 transitions, 71 flow. Second operand has 8 states, 8 states have (on average 4.125) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 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 21:27:31,823 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:27:31,823 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 17 [2022-12-05 21:27:31,823 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:27:31,980 INFO L130 PetriNetUnfolder]: 94/163 cut-off events. [2022-12-05 21:27:31,980 INFO L131 PetriNetUnfolder]: For 56/56 co-relation queries the response was YES. [2022-12-05 21:27:31,982 INFO L83 FinitePrefix]: Finished finitePrefix Result has 417 conditions, 163 events. 94/163 cut-off events. For 56/56 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 409 event pairs, 11 based on Foata normal form. 6/169 useless extension candidates. Maximal degree in co-relation 145. Up to 46 conditions per place. [2022-12-05 21:27:31,986 INFO L137 encePairwiseOnDemand]: 9/17 looper letters, 32 selfloop transitions, 19 changer transitions 0/51 dead transitions. [2022-12-05 21:27:31,986 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 51 transitions, 255 flow [2022-12-05 21:27:31,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-05 21:27:31,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-12-05 21:27:31,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 52 transitions. [2022-12-05 21:27:31,988 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.3058823529411765 [2022-12-05 21:27:31,988 INFO L175 Difference]: Start difference. First operand has 25 places, 20 transitions, 71 flow. Second operand 10 states and 52 transitions. [2022-12-05 21:27:31,988 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 51 transitions, 255 flow [2022-12-05 21:27:31,989 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 51 transitions, 252 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-05 21:27:31,990 INFO L231 Difference]: Finished difference. Result has 37 places, 35 transitions, 189 flow [2022-12-05 21:27:31,990 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=17, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=10, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=189, PETRI_PLACES=37, PETRI_TRANSITIONS=35} [2022-12-05 21:27:31,991 INFO L294 CegarLoopForPetriNet]: 22 programPoint places, 15 predicate places. [2022-12-05 21:27:31,991 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 35 transitions, 189 flow [2022-12-05 21:27:31,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 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 21:27:31,992 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:27:31,992 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:27:31,999 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 21:27:32,199 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 21:27:32,200 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:27:32,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:27:32,200 INFO L85 PathProgramCache]: Analyzing trace with hash 384197232, now seen corresponding path program 3 times [2022-12-05 21:27:32,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:27:32,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062171867] [2022-12-05 21:27:32,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:27:32,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:27:32,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:27:32,626 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:27:32,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:27:32,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062171867] [2022-12-05 21:27:32,627 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062171867] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:27:32,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1706914386] [2022-12-05 21:27:32,627 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-05 21:27:32,627 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:27:32,627 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:27:32,629 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 21:27:32,631 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 21:27:32,690 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-05 21:27:32,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:27:32,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 26 conjunts are in the unsatisfiable core [2022-12-05 21:27:32,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:27:32,996 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:27:32,996 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:27:33,242 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:27:33,243 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1706914386] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:27:33,243 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:27:33,243 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 17 [2022-12-05 21:27:33,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159243504] [2022-12-05 21:27:33,243 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:27:33,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-05 21:27:33,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:27:33,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-05 21:27:33,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2022-12-05 21:27:33,246 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 17 [2022-12-05 21:27:33,246 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 35 transitions, 189 flow. Second operand has 19 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 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 21:27:33,246 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:27:33,246 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 17 [2022-12-05 21:27:33,247 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:27:36,676 INFO L130 PetriNetUnfolder]: 463/802 cut-off events. [2022-12-05 21:27:36,676 INFO L131 PetriNetUnfolder]: For 1069/1069 co-relation queries the response was YES. [2022-12-05 21:27:36,678 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2833 conditions, 802 events. 463/802 cut-off events. For 1069/1069 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 3434 event pairs, 10 based on Foata normal form. 10/812 useless extension candidates. Maximal degree in co-relation 1081. Up to 191 conditions per place. [2022-12-05 21:27:36,680 INFO L137 encePairwiseOnDemand]: 7/17 looper letters, 114 selfloop transitions, 132 changer transitions 58/304 dead transitions. [2022-12-05 21:27:36,681 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 304 transitions, 2114 flow [2022-12-05 21:27:36,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-12-05 21:27:36,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2022-12-05 21:27:36,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 242 transitions. [2022-12-05 21:27:36,683 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.309462915601023 [2022-12-05 21:27:36,683 INFO L175 Difference]: Start difference. First operand has 37 places, 35 transitions, 189 flow. Second operand 46 states and 242 transitions. [2022-12-05 21:27:36,683 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 304 transitions, 2114 flow [2022-12-05 21:27:36,688 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 304 transitions, 2036 flow, removed 28 selfloop flow, removed 3 redundant places. [2022-12-05 21:27:36,691 INFO L231 Difference]: Finished difference. Result has 108 places, 166 transitions, 1461 flow [2022-12-05 21:27:36,691 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=17, PETRI_DIFFERENCE_MINUEND_FLOW=175, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=1461, PETRI_PLACES=108, PETRI_TRANSITIONS=166} [2022-12-05 21:27:36,691 INFO L294 CegarLoopForPetriNet]: 22 programPoint places, 86 predicate places. [2022-12-05 21:27:36,692 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 166 transitions, 1461 flow [2022-12-05 21:27:36,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 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 21:27:36,692 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:27:36,692 INFO L213 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:27:36,699 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 21:27:36,897 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 21:27:36,897 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:27:36,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:27:36,898 INFO L85 PathProgramCache]: Analyzing trace with hash 2144957456, now seen corresponding path program 1 times [2022-12-05 21:27:36,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:27:36,898 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512869429] [2022-12-05 21:27:36,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:27:36,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:27:36,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:27:37,782 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:27:37,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:27:37,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512869429] [2022-12-05 21:27:37,783 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512869429] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:27:37,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047861206] [2022-12-05 21:27:37,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:27:37,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:27:37,783 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:27:37,785 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 21:27:37,787 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 21:27:37,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:27:37,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 28 conjunts are in the unsatisfiable core [2022-12-05 21:27:37,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:27:38,292 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:27:38,293 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:27:39,360 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:27:39,360 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1047861206] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:27:39,361 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:27:39,361 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 25 [2022-12-05 21:27:39,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255418710] [2022-12-05 21:27:39,361 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:27:39,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-12-05 21:27:39,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:27:39,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-12-05 21:27:39,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=567, Unknown=0, NotChecked=0, Total=702 [2022-12-05 21:27:39,362 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 17 [2022-12-05 21:27:39,362 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 166 transitions, 1461 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 21:27:39,362 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:27:39,362 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 17 [2022-12-05 21:27:39,362 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:27:49,505 INFO L130 PetriNetUnfolder]: 1070/1886 cut-off events. [2022-12-05 21:27:49,505 INFO L131 PetriNetUnfolder]: For 21935/21935 co-relation queries the response was YES. [2022-12-05 21:27:49,512 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10293 conditions, 1886 events. 1070/1886 cut-off events. For 21935/21935 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 10040 event pairs, 2 based on Foata normal form. 13/1899 useless extension candidates. Maximal degree in co-relation 10198. Up to 449 conditions per place. [2022-12-05 21:27:49,520 INFO L137 encePairwiseOnDemand]: 7/17 looper letters, 269 selfloop transitions, 292 changer transitions 90/651 dead transitions. [2022-12-05 21:27:49,520 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 651 transitions, 6784 flow [2022-12-05 21:27:49,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-12-05 21:27:49,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2022-12-05 21:27:49,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 328 transitions. [2022-12-05 21:27:49,523 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.29683257918552036 [2022-12-05 21:27:49,523 INFO L175 Difference]: Start difference. First operand has 108 places, 166 transitions, 1461 flow. Second operand 65 states and 328 transitions. [2022-12-05 21:27:49,524 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 651 transitions, 6784 flow [2022-12-05 21:27:49,578 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 651 transitions, 6436 flow, removed 167 selfloop flow, removed 9 redundant places. [2022-12-05 21:27:49,591 INFO L231 Difference]: Finished difference. Result has 188 places, 405 transitions, 4592 flow [2022-12-05 21:27:49,592 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=17, PETRI_DIFFERENCE_MINUEND_FLOW=1329, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=65, PETRI_FLOW=4592, PETRI_PLACES=188, PETRI_TRANSITIONS=405} [2022-12-05 21:27:49,593 INFO L294 CegarLoopForPetriNet]: 22 programPoint places, 166 predicate places. [2022-12-05 21:27:49,593 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 405 transitions, 4592 flow [2022-12-05 21:27:49,594 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 21:27:49,594 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:27:49,594 INFO L213 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:27:49,598 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 21:27:49,798 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 21:27:49,798 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:27:49,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:27:49,799 INFO L85 PathProgramCache]: Analyzing trace with hash -1687316806, now seen corresponding path program 2 times [2022-12-05 21:27:49,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:27:49,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663909030] [2022-12-05 21:27:49,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:27:49,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:27:49,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:27:50,330 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:27:50,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:27:50,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663909030] [2022-12-05 21:27:50,330 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663909030] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:27:50,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1460262026] [2022-12-05 21:27:50,331 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-05 21:27:50,331 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:27:50,331 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:27:50,332 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 21:27:50,334 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 21:27:50,427 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-05 21:27:50,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:27:50,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 28 conjunts are in the unsatisfiable core [2022-12-05 21:27:50,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:27:50,794 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:27:50,795 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:27:51,653 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:27:51,654 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1460262026] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:27:51,654 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:27:51,654 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 21 [2022-12-05 21:27:51,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398469763] [2022-12-05 21:27:51,654 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:27:51,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-12-05 21:27:51,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:27:51,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-12-05 21:27:51,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=398, Unknown=0, NotChecked=0, Total=506 [2022-12-05 21:27:51,655 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 17 [2022-12-05 21:27:51,655 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 405 transitions, 4592 flow. Second operand has 23 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 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 21:27:51,656 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:27:51,656 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 17 [2022-12-05 21:27:51,656 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:28:02,650 INFO L130 PetriNetUnfolder]: 1538/2705 cut-off events. [2022-12-05 21:28:02,651 INFO L131 PetriNetUnfolder]: For 31601/31601 co-relation queries the response was YES. [2022-12-05 21:28:02,659 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16586 conditions, 2705 events. 1538/2705 cut-off events. For 31601/31601 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 15528 event pairs, 23 based on Foata normal form. 10/2715 useless extension candidates. Maximal degree in co-relation 16451. Up to 625 conditions per place. [2022-12-05 21:28:02,671 INFO L137 encePairwiseOnDemand]: 7/17 looper letters, 228 selfloop transitions, 557 changer transitions 70/855 dead transitions. [2022-12-05 21:28:02,671 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 855 transitions, 11235 flow [2022-12-05 21:28:02,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-12-05 21:28:02,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2022-12-05 21:28:02,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 312 transitions. [2022-12-05 21:28:02,681 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.25849212924606463 [2022-12-05 21:28:02,681 INFO L175 Difference]: Start difference. First operand has 188 places, 405 transitions, 4592 flow. Second operand 71 states and 312 transitions. [2022-12-05 21:28:02,681 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 855 transitions, 11235 flow [2022-12-05 21:28:02,802 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 855 transitions, 10637 flow, removed 291 selfloop flow, removed 16 redundant places. [2022-12-05 21:28:02,812 INFO L231 Difference]: Finished difference. Result has 267 places, 669 transitions, 9269 flow [2022-12-05 21:28:02,812 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=17, PETRI_DIFFERENCE_MINUEND_FLOW=4300, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=405, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=315, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=71, PETRI_FLOW=9269, PETRI_PLACES=267, PETRI_TRANSITIONS=669} [2022-12-05 21:28:02,812 INFO L294 CegarLoopForPetriNet]: 22 programPoint places, 245 predicate places. [2022-12-05 21:28:02,813 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 669 transitions, 9269 flow [2022-12-05 21:28:02,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 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 21:28:02,813 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:28:02,813 INFO L213 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:28:02,817 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 21:28:03,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:28:03,015 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:28:03,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:28:03,016 INFO L85 PathProgramCache]: Analyzing trace with hash -288540808, now seen corresponding path program 3 times [2022-12-05 21:28:03,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:28:03,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930028518] [2022-12-05 21:28:03,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:28:03,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:28:03,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:28:03,799 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:28:03,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:28:03,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930028518] [2022-12-05 21:28:03,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930028518] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:28:03,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1157200665] [2022-12-05 21:28:03,800 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-05 21:28:03,800 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:28:03,800 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:28:03,801 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 21:28:03,831 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 21:28:03,932 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-05 21:28:03,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:28:03,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 28 conjunts are in the unsatisfiable core [2022-12-05 21:28:03,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:28:04,581 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:28:04,581 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:28:05,292 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:28:05,292 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1157200665] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:28:05,292 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:28:05,293 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 24 [2022-12-05 21:28:05,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197373747] [2022-12-05 21:28:05,293 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:28:05,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-12-05 21:28:05,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:28:05,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-12-05 21:28:05,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=533, Unknown=0, NotChecked=0, Total=650 [2022-12-05 21:28:05,295 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 17 [2022-12-05 21:28:05,295 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 669 transitions, 9269 flow. Second operand has 26 states, 25 states have (on average 2.12) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 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 21:28:05,295 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:28:05,295 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 17 [2022-12-05 21:28:05,295 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:28:35,174 INFO L130 PetriNetUnfolder]: 2077/3692 cut-off events. [2022-12-05 21:28:35,175 INFO L131 PetriNetUnfolder]: For 83475/83475 co-relation queries the response was YES. [2022-12-05 21:28:35,224 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26975 conditions, 3692 events. 2077/3692 cut-off events. For 83475/83475 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 22792 event pairs, 4 based on Foata normal form. 26/3718 useless extension candidates. Maximal degree in co-relation 26804. Up to 910 conditions per place. [2022-12-05 21:28:35,243 INFO L137 encePairwiseOnDemand]: 7/17 looper letters, 370 selfloop transitions, 709 changer transitions 146/1225 dead transitions. [2022-12-05 21:28:35,243 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 1225 transitions, 18547 flow [2022-12-05 21:28:35,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2022-12-05 21:28:35,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2022-12-05 21:28:35,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 431 transitions. [2022-12-05 21:28:35,250 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.26687306501547986 [2022-12-05 21:28:35,250 INFO L175 Difference]: Start difference. First operand has 267 places, 669 transitions, 9269 flow. Second operand 95 states and 431 transitions. [2022-12-05 21:28:35,250 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 1225 transitions, 18547 flow [2022-12-05 21:28:35,706 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 1225 transitions, 17069 flow, removed 429 selfloop flow, removed 28 redundant places. [2022-12-05 21:28:35,721 INFO L231 Difference]: Finished difference. Result has 377 places, 923 transitions, 14387 flow [2022-12-05 21:28:35,722 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=17, PETRI_DIFFERENCE_MINUEND_FLOW=8415, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=669, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=485, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=95, PETRI_FLOW=14387, PETRI_PLACES=377, PETRI_TRANSITIONS=923} [2022-12-05 21:28:35,723 INFO L294 CegarLoopForPetriNet]: 22 programPoint places, 355 predicate places. [2022-12-05 21:28:35,723 INFO L495 AbstractCegarLoop]: Abstraction has has 377 places, 923 transitions, 14387 flow [2022-12-05 21:28:35,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.12) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 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 21:28:35,723 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:28:35,723 INFO L213 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:28:35,728 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 21:28:35,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:28:35,928 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:28:35,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:28:35,928 INFO L85 PathProgramCache]: Analyzing trace with hash 1048122568, now seen corresponding path program 4 times [2022-12-05 21:28:35,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:28:35,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182057048] [2022-12-05 21:28:35,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:28:35,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:28:35,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:28:39,913 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:28:39,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:28:39,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182057048] [2022-12-05 21:28:39,913 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182057048] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:28:39,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1691852694] [2022-12-05 21:28:39,914 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-05 21:28:39,914 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:28:39,914 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:28:39,916 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 21:28:39,918 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 21:28:40,137 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-05 21:28:40,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:28:40,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 31 conjunts are in the unsatisfiable core [2022-12-05 21:28:40,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:28:41,344 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:28:41,344 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:28:46,363 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:28:46,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1691852694] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:28:46,363 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:28:46,364 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 26 [2022-12-05 21:28:46,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333381895] [2022-12-05 21:28:46,364 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:28:46,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-12-05 21:28:46,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:28:46,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-12-05 21:28:46,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=624, Unknown=1, NotChecked=0, Total=756 [2022-12-05 21:28:46,365 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 17 [2022-12-05 21:28:46,365 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 377 places, 923 transitions, 14387 flow. Second operand has 28 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 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 21:28:46,365 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:28:46,365 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 17 [2022-12-05 21:28:46,365 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:28:52,395 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-05 21:29:11,605 WARN L233 SmtUtils]: Spent 8.40s on a formula simplification. DAG size of input: 101 DAG size of output: 69 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-05 21:29:13,662 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-05 21:29:45,046 WARN L233 SmtUtils]: Spent 12.16s on a formula simplification. DAG size of input: 94 DAG size of output: 54 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-05 21:29:47,443 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-05 21:30:17,942 INFO L130 PetriNetUnfolder]: 2769/4831 cut-off events. [2022-12-05 21:30:17,942 INFO L131 PetriNetUnfolder]: For 95823/95823 co-relation queries the response was YES. [2022-12-05 21:30:17,971 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38356 conditions, 4831 events. 2769/4831 cut-off events. For 95823/95823 co-relation queries the response was YES. Maximal size of possible extension queue 301. Compared 31318 event pairs, 10 based on Foata normal form. 16/4847 useless extension candidates. Maximal degree in co-relation 37928. Up to 1280 conditions per place. [2022-12-05 21:30:18,025 INFO L137 encePairwiseOnDemand]: 6/17 looper letters, 468 selfloop transitions, 1028 changer transitions 94/1590 dead transitions. [2022-12-05 21:30:18,025 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 453 places, 1590 transitions, 27305 flow [2022-12-05 21:30:18,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-12-05 21:30:18,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2022-12-05 21:30:18,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 427 transitions. [2022-12-05 21:30:18,027 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.2511764705882353 [2022-12-05 21:30:18,027 INFO L175 Difference]: Start difference. First operand has 377 places, 923 transitions, 14387 flow. Second operand 100 states and 427 transitions. [2022-12-05 21:30:18,027 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 453 places, 1590 transitions, 27305 flow [2022-12-05 21:30:19,012 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 407 places, 1590 transitions, 26157 flow, removed 514 selfloop flow, removed 46 redundant places. [2022-12-05 21:30:19,033 INFO L231 Difference]: Finished difference. Result has 446 places, 1303 transitions, 23160 flow [2022-12-05 21:30:19,033 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=17, PETRI_DIFFERENCE_MINUEND_FLOW=13871, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=923, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=684, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=200, PETRI_DIFFERENCE_SUBTRAHEND_STATES=100, PETRI_FLOW=23160, PETRI_PLACES=446, PETRI_TRANSITIONS=1303} [2022-12-05 21:30:19,034 INFO L294 CegarLoopForPetriNet]: 22 programPoint places, 424 predicate places. [2022-12-05 21:30:19,034 INFO L495 AbstractCegarLoop]: Abstraction has has 446 places, 1303 transitions, 23160 flow [2022-12-05 21:30:19,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 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 21:30:19,034 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:30:19,035 INFO L213 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:30:19,042 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 21:30:19,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:30:19,238 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:30:19,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:30:19,239 INFO L85 PathProgramCache]: Analyzing trace with hash -1006607540, now seen corresponding path program 5 times [2022-12-05 21:30:19,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:30:19,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839153824] [2022-12-05 21:30:19,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:30:19,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:30:19,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:30:19,880 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:30:19,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:30:19,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839153824] [2022-12-05 21:30:19,881 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839153824] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:30:19,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [540739909] [2022-12-05 21:30:19,881 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-05 21:30:19,881 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:30:19,881 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:30:19,887 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 21:30:19,889 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 21:30:19,970 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-12-05 21:30:19,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:30:19,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 29 conjunts are in the unsatisfiable core [2022-12-05 21:30:19,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:30:20,684 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:30:20,685 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:30:21,574 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:30:21,574 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [540739909] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:30:21,574 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:30:21,574 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2022-12-05 21:30:21,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428993887] [2022-12-05 21:30:21,575 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:30:21,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-12-05 21:30:21,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:30:21,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-12-05 21:30:21,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=538, Unknown=0, NotChecked=0, Total=650 [2022-12-05 21:30:21,576 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 17 [2022-12-05 21:30:21,576 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 446 places, 1303 transitions, 23160 flow. Second operand has 26 states, 25 states have (on average 1.8) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 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 21:30:21,576 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:30:21,576 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 17 [2022-12-05 21:30:21,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:30:55,315 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-05 21:30:58,764 INFO L130 PetriNetUnfolder]: 4494/7894 cut-off events. [2022-12-05 21:30:58,765 INFO L131 PetriNetUnfolder]: For 165926/165926 co-relation queries the response was YES. [2022-12-05 21:30:58,817 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69645 conditions, 7894 events. 4494/7894 cut-off events. For 165926/165926 co-relation queries the response was YES. Maximal size of possible extension queue 491. Compared 55582 event pairs, 16 based on Foata normal form. 36/7930 useless extension candidates. Maximal degree in co-relation 69364. Up to 1820 conditions per place. [2022-12-05 21:30:58,871 INFO L137 encePairwiseOnDemand]: 6/17 looper letters, 252 selfloop transitions, 2054 changer transitions 188/2494 dead transitions. [2022-12-05 21:30:58,871 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 540 places, 2494 transitions, 49190 flow [2022-12-05 21:30:58,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2022-12-05 21:30:58,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2022-12-05 21:30:58,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 490 transitions. [2022-12-05 21:30:58,873 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.2668845315904139 [2022-12-05 21:30:58,873 INFO L175 Difference]: Start difference. First operand has 446 places, 1303 transitions, 23160 flow. Second operand 108 states and 490 transitions. [2022-12-05 21:30:58,873 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 540 places, 2494 transitions, 49190 flow [2022-12-05 21:31:01,528 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 511 places, 2494 transitions, 46438 flow, removed 1256 selfloop flow, removed 29 redundant places. [2022-12-05 21:31:01,563 INFO L231 Difference]: Finished difference. Result has 551 places, 2171 transitions, 43174 flow [2022-12-05 21:31:01,564 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=17, PETRI_DIFFERENCE_MINUEND_FLOW=22056, PETRI_DIFFERENCE_MINUEND_PLACES=404, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1302, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1225, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=108, PETRI_FLOW=43174, PETRI_PLACES=551, PETRI_TRANSITIONS=2171} [2022-12-05 21:31:01,565 INFO L294 CegarLoopForPetriNet]: 22 programPoint places, 529 predicate places. [2022-12-05 21:31:01,565 INFO L495 AbstractCegarLoop]: Abstraction has has 551 places, 2171 transitions, 43174 flow [2022-12-05 21:31:01,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 1.8) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 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 21:31:01,565 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:31:01,565 INFO L213 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:31:01,569 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 21:31:01,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:31:01,769 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:31:01,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:31:01,769 INFO L85 PathProgramCache]: Analyzing trace with hash 1773926574, now seen corresponding path program 6 times [2022-12-05 21:31:01,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:31:01,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164551359] [2022-12-05 21:31:01,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:31:01,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:31:01,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:31:02,672 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:31:02,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:31:02,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164551359] [2022-12-05 21:31:02,673 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164551359] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:31:02,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558655397] [2022-12-05 21:31:02,673 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-05 21:31:02,673 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:31:02,673 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:31:02,674 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 21:31:02,675 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 21:31:02,777 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-12-05 21:31:02,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:31:02,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 25 conjunts are in the unsatisfiable core [2022-12-05 21:31:02,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:31:03,368 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:31:03,368 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:31:04,547 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:31:04,548 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [558655397] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:31:04,548 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:31:04,548 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 20 [2022-12-05 21:31:04,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243160978] [2022-12-05 21:31:04,548 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:31:04,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-12-05 21:31:04,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:31:04,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-12-05 21:31:04,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2022-12-05 21:31:04,549 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 17 [2022-12-05 21:31:04,549 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 551 places, 2171 transitions, 43174 flow. Second operand has 22 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 21 states have internal predecessors, (53), 0 states have call successors, (0), 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 21:31:04,549 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:31:04,549 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 17 [2022-12-05 21:31:04,549 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:31:19,476 INFO L130 PetriNetUnfolder]: 4735/8230 cut-off events. [2022-12-05 21:31:19,476 INFO L131 PetriNetUnfolder]: For 186632/186632 co-relation queries the response was YES. [2022-12-05 21:31:19,538 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79404 conditions, 8230 events. 4735/8230 cut-off events. For 186632/186632 co-relation queries the response was YES. Maximal size of possible extension queue 540. Compared 57685 event pairs, 87 based on Foata normal form. 11/8241 useless extension candidates. Maximal degree in co-relation 79175. Up to 3526 conditions per place. [2022-12-05 21:31:19,575 INFO L137 encePairwiseOnDemand]: 9/17 looper letters, 900 selfloop transitions, 1578 changer transitions 61/2539 dead transitions. [2022-12-05 21:31:19,575 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 567 places, 2539 transitions, 55278 flow [2022-12-05 21:31:19,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-12-05 21:31:19,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-12-05 21:31:19,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 214 transitions. [2022-12-05 21:31:19,576 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.2797385620915033 [2022-12-05 21:31:19,576 INFO L175 Difference]: Start difference. First operand has 551 places, 2171 transitions, 43174 flow. Second operand 45 states and 214 transitions. [2022-12-05 21:31:19,577 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 567 places, 2539 transitions, 55278 flow [2022-12-05 21:31:23,544 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 530 places, 2539 transitions, 53587 flow, removed 758 selfloop flow, removed 37 redundant places. [2022-12-05 21:31:23,588 INFO L231 Difference]: Finished difference. Result has 558 places, 2365 transitions, 49912 flow [2022-12-05 21:31:23,589 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=17, PETRI_DIFFERENCE_MINUEND_FLOW=41928, PETRI_DIFFERENCE_MINUEND_PLACES=486, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1398, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=731, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=49912, PETRI_PLACES=558, PETRI_TRANSITIONS=2365} [2022-12-05 21:31:23,590 INFO L294 CegarLoopForPetriNet]: 22 programPoint places, 536 predicate places. [2022-12-05 21:31:23,590 INFO L495 AbstractCegarLoop]: Abstraction has has 558 places, 2365 transitions, 49912 flow [2022-12-05 21:31:23,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 21 states have internal predecessors, (53), 0 states have call successors, (0), 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 21:31:23,590 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:31:23,590 INFO L213 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:31:23,596 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-05 21:31:23,794 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,SelfDestructingSolverStorable9 [2022-12-05 21:31:23,794 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:31:23,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:31:23,795 INFO L85 PathProgramCache]: Analyzing trace with hash 1549652735, now seen corresponding path program 7 times [2022-12-05 21:31:23,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:31:23,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368784158] [2022-12-05 21:31:23,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:31:23,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:31:23,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:31:26,709 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:31:26,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:31:26,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368784158] [2022-12-05 21:31:26,710 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368784158] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:31:26,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212912038] [2022-12-05 21:31:26,710 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-05 21:31:26,710 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:31:26,710 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:31:26,711 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 21:31:26,712 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 21:31:26,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:31:26,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 29 conjunts are in the unsatisfiable core [2022-12-05 21:31:26,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:31:29,367 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:31:29,367 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:31:44,283 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:31:44,284 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1212912038] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:31:44,284 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:31:44,284 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 26 [2022-12-05 21:31:44,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185176576] [2022-12-05 21:31:44,284 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:31:44,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-12-05 21:31:44,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:31:44,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-12-05 21:31:44,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=607, Unknown=3, NotChecked=0, Total=756 [2022-12-05 21:31:44,285 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 17 [2022-12-05 21:31:44,285 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 558 places, 2365 transitions, 49912 flow. Second operand has 28 states, 27 states have (on average 2.185185185185185) internal successors, (59), 27 states have internal predecessors, (59), 0 states have call successors, (0), 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 21:31:44,286 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:31:44,286 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 17 [2022-12-05 21:31:44,286 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:32:28,077 INFO L130 PetriNetUnfolder]: 5582/9772 cut-off events. [2022-12-05 21:32:28,077 INFO L131 PetriNetUnfolder]: For 285466/285466 co-relation queries the response was YES. [2022-12-05 21:32:28,155 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96767 conditions, 9772 events. 5582/9772 cut-off events. For 285466/285466 co-relation queries the response was YES. Maximal size of possible extension queue 627. Compared 70784 event pairs, 7 based on Foata normal form. 20/9792 useless extension candidates. Maximal degree in co-relation 96376. Up to 3461 conditions per place. [2022-12-05 21:32:28,198 INFO L137 encePairwiseOnDemand]: 8/17 looper letters, 1073 selfloop transitions, 1885 changer transitions 92/3050 dead transitions. [2022-12-05 21:32:28,198 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 619 places, 3050 transitions, 68712 flow [2022-12-05 21:32:28,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-12-05 21:32:28,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2022-12-05 21:32:28,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 369 transitions. [2022-12-05 21:32:28,200 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.3145780051150895 [2022-12-05 21:32:28,200 INFO L175 Difference]: Start difference. First operand has 558 places, 2365 transitions, 49912 flow. Second operand 69 states and 369 transitions. [2022-12-05 21:32:28,200 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 619 places, 3050 transitions, 68712 flow [2022-12-05 21:32:33,831 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 599 places, 3050 transitions, 68057 flow, removed 286 selfloop flow, removed 20 redundant places. [2022-12-05 21:32:33,883 INFO L231 Difference]: Finished difference. Result has 624 places, 2706 transitions, 61916 flow [2022-12-05 21:32:33,885 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=17, PETRI_DIFFERENCE_MINUEND_FLOW=49488, PETRI_DIFFERENCE_MINUEND_PLACES=531, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2365, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1569, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=757, PETRI_DIFFERENCE_SUBTRAHEND_STATES=69, PETRI_FLOW=61916, PETRI_PLACES=624, PETRI_TRANSITIONS=2706} [2022-12-05 21:32:33,886 INFO L294 CegarLoopForPetriNet]: 22 programPoint places, 602 predicate places. [2022-12-05 21:32:33,886 INFO L495 AbstractCegarLoop]: Abstraction has has 624 places, 2706 transitions, 61916 flow [2022-12-05 21:32:33,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.185185185185185) internal successors, (59), 27 states have internal predecessors, (59), 0 states have call successors, (0), 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 21:32:33,886 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:32:33,886 INFO L213 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:32:33,892 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-05 21:32:34,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:32:34,090 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:32:34,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:32:34,091 INFO L85 PathProgramCache]: Analyzing trace with hash -1460746835, now seen corresponding path program 8 times [2022-12-05 21:32:34,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:32:34,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135622103] [2022-12-05 21:32:34,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:32:34,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:32:34,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:32:34,560 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-05 21:32:34,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:32:34,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135622103] [2022-12-05 21:32:34,560 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135622103] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:32:34,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1283558530] [2022-12-05 21:32:34,560 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-05 21:32:34,560 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:32:34,561 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:32:34,568 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 21:32:34,572 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 21:32:34,703 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-05 21:32:34,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:32:34,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 44 conjunts are in the unsatisfiable core [2022-12-05 21:32:34,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:32:35,293 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:32:35,293 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:32:36,061 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:32:36,061 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1283558530] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:32:36,061 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:32:36,061 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13, 13] total 35 [2022-12-05 21:32:36,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713296768] [2022-12-05 21:32:36,062 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:32:36,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-12-05 21:32:36,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:32:36,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-12-05 21:32:36,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=256, Invalid=1076, Unknown=0, NotChecked=0, Total=1332 [2022-12-05 21:32:36,063 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 17 [2022-12-05 21:32:36,063 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 624 places, 2706 transitions, 61916 flow. Second operand has 37 states, 36 states have (on average 1.6388888888888888) internal successors, (59), 36 states have internal predecessors, (59), 0 states have call successors, (0), 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 21:32:36,063 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:32:36,063 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 17 [2022-12-05 21:32:36,063 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:32:52,173 INFO L130 PetriNetUnfolder]: 5713/9978 cut-off events. [2022-12-05 21:32:52,173 INFO L131 PetriNetUnfolder]: For 234553/234553 co-relation queries the response was YES. [2022-12-05 21:32:52,259 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101859 conditions, 9978 events. 5713/9978 cut-off events. For 234553/234553 co-relation queries the response was YES. Maximal size of possible extension queue 664. Compared 72935 event pairs, 10 based on Foata normal form. 53/10031 useless extension candidates. Maximal degree in co-relation 101677. Up to 2568 conditions per place. [2022-12-05 21:32:52,274 INFO L137 encePairwiseOnDemand]: 7/17 looper letters, 0 selfloop transitions, 0 changer transitions 3055/3055 dead transitions. [2022-12-05 21:32:52,274 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 666 places, 3055 transitions, 75630 flow [2022-12-05 21:32:52,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-12-05 21:32:52,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2022-12-05 21:32:52,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 213 transitions. [2022-12-05 21:32:52,276 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.22780748663101605 [2022-12-05 21:32:52,276 INFO L175 Difference]: Start difference. First operand has 624 places, 2706 transitions, 61916 flow. Second operand 55 states and 213 transitions. [2022-12-05 21:32:52,276 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 666 places, 3055 transitions, 75630 flow [2022-12-05 21:32:58,089 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 658 places, 3055 transitions, 74400 flow, removed 600 selfloop flow, removed 8 redundant places. [2022-12-05 21:32:58,119 INFO L231 Difference]: Finished difference. Result has 658 places, 0 transitions, 0 flow [2022-12-05 21:32:58,120 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=17, PETRI_DIFFERENCE_MINUEND_FLOW=61132, PETRI_DIFFERENCE_MINUEND_PLACES=604, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2705, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2705, PETRI_DIFFERENCE_SUBTRAHEND_STATES=55, PETRI_FLOW=0, PETRI_PLACES=658, PETRI_TRANSITIONS=0} [2022-12-05 21:32:58,121 INFO L294 CegarLoopForPetriNet]: 22 programPoint places, 636 predicate places. [2022-12-05 21:32:58,121 INFO L495 AbstractCegarLoop]: Abstraction has has 658 places, 0 transitions, 0 flow [2022-12-05 21:32:58,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 1.6388888888888888) internal successors, (59), 36 states have internal predecessors, (59), 0 states have call successors, (0), 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 21:32:58,123 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2022-12-05 21:32:58,123 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2022-12-05 21:32:58,123 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2022-12-05 21:32:58,128 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-12-05 21:32:58,324 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,SelfDestructingSolverStorable11 [2022-12-05 21:32:58,325 INFO L458 BasicCegarLoop]: Path program histogram: [8, 3, 1] [2022-12-05 21:32:58,327 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-12-05 21:32:58,327 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-12-05 21:32:58,329 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.12 09:32:58 BasicIcfg [2022-12-05 21:32:58,329 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-12-05 21:32:58,329 INFO L158 Benchmark]: Toolchain (without parser) took 330500.56ms. Allocated memory was 202.4MB in the beginning and 2.7GB in the end (delta: 2.5GB). Free memory was 170.3MB in the beginning and 1.5GB in the end (delta: -1.3GB). Peak memory consumption was 1.8GB. Max. memory is 8.0GB. [2022-12-05 21:32:58,329 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 202.4MB. Free memory is still 179.9MB. There was no memory consumed. Max. memory is 8.0GB. [2022-12-05 21:32:58,329 INFO L158 Benchmark]: CACSL2BoogieTranslator took 224.21ms. Allocated memory is still 202.4MB. Free memory was 170.3MB in the beginning and 157.7MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. [2022-12-05 21:32:58,330 INFO L158 Benchmark]: Boogie Procedure Inliner took 34.25ms. Allocated memory is still 202.4MB. Free memory was 157.7MB in the beginning and 156.2MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-12-05 21:32:58,330 INFO L158 Benchmark]: Boogie Preprocessor took 27.22ms. Allocated memory is still 202.4MB. Free memory was 156.2MB in the beginning and 154.6MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-12-05 21:32:58,330 INFO L158 Benchmark]: RCFGBuilder took 292.66ms. Allocated memory is still 202.4MB. Free memory was 154.6MB in the beginning and 139.4MB in the end (delta: 15.2MB). Peak memory consumption was 14.7MB. Max. memory is 8.0GB. [2022-12-05 21:32:58,330 INFO L158 Benchmark]: TraceAbstraction took 329916.67ms. Allocated memory was 202.4MB in the beginning and 2.7GB in the end (delta: 2.5GB). Free memory was 138.3MB in the beginning and 1.5GB in the end (delta: -1.3GB). Peak memory consumption was 1.8GB. Max. memory is 8.0GB. [2022-12-05 21:32:58,331 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 202.4MB. Free memory is still 179.9MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 224.21ms. Allocated memory is still 202.4MB. Free memory was 170.3MB in the beginning and 157.7MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 34.25ms. Allocated memory is still 202.4MB. Free memory was 157.7MB in the beginning and 156.2MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * Boogie Preprocessor took 27.22ms. Allocated memory is still 202.4MB. Free memory was 156.2MB in the beginning and 154.6MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 292.66ms. Allocated memory is still 202.4MB. Free memory was 154.6MB in the beginning and 139.4MB in the end (delta: 15.2MB). Peak memory consumption was 14.7MB. Max. memory is 8.0GB. * TraceAbstraction took 329916.67ms. Allocated memory was 202.4MB in the beginning and 2.7GB in the end (delta: 2.5GB). Free memory was 138.3MB in the beginning and 1.5GB in the end (delta: -1.3GB). Peak memory consumption was 1.8GB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2.1s, 72 PlacesBefore, 22 PlacesAfterwards, 71 TransitionsBefore, 17 TransitionsAfterwards, 396 CoEnabledTransitionPairs, 2 FixpointIterations, 0 TrivialSequentialCompositions, 0 ConcurrentSequentialCompositions, 36 TrivialYvCompositions, 14 ConcurrentYvCompositions, 4 ChoiceCompositions, 54 TotalNumberOfCompositions, Independence Relation Statistics: ConditionTransformingIndependenceRelation.Independence Queries: [ total: 188, independent: 179, independent conditional: 179, independent unconditional: 0, dependent: 9, dependent conditional: 9, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ConditionTransformingIndependenceRelation.Statistics on underlying relation: DisjunctiveConditionalIndependenceRelation.Independence Queries: [ total: 188, independent: 179, independent conditional: 0, independent unconditional: 179, dependent: 9, dependent conditional: 0, dependent unconditional: 9, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , DisjunctiveConditionalIndependenceRelation.Statistics on underlying relation: SemanticConditionEliminator.Independence Queries: [ total: 188, independent: 179, independent conditional: 0, independent unconditional: 179, dependent: 9, dependent conditional: 0, dependent unconditional: 9, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticConditionEliminator.Statistics on underlying relation: CachedIndependenceRelation.Independence Queries: [ total: 188, independent: 179, independent conditional: 0, independent unconditional: 179, dependent: 9, dependent conditional: 0, dependent unconditional: 9, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 177, independent: 172, independent conditional: 0, independent unconditional: 172, dependent: 5, dependent conditional: 0, dependent unconditional: 5, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 177, independent: 172, independent conditional: 0, independent unconditional: 172, dependent: 5, dependent conditional: 0, dependent unconditional: 5, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 5, independent: 0, independent conditional: 0, independent unconditional: 0, dependent: 5, dependent conditional: 0, dependent unconditional: 5, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 13, independent: 0, independent conditional: 0, independent unconditional: 0, dependent: 13, dependent conditional: 0, dependent unconditional: 13, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 188, independent: 7, independent conditional: 0, independent unconditional: 7, dependent: 4, dependent conditional: 0, dependent unconditional: 4, unknown: 177, unknown conditional: 0, unknown unconditional: 177] , Statistics on independence cache: Total cache size (in pairs): 257, Positive cache size: 252, Positive conditional cache size: 0, Positive unconditional cache size: 252, Negative cache size: 5, Negative conditional cache size: 0, Negative unconditional cache size: 5, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0, Eliminated conditions: 0, Maximal queried relation: -1 - PositiveResult [Line: 95]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 93 locations, 3 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: 329.8s, OverallIterations: 12, TraceHistogramMax: 3, PathProgramHistogramMax: 8, EmptinessCheckTime: 0.0s, AutomataDifference: 279.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.2s, HoareTripleCheckerStatistics: 2 mSolverCounterUnknown, 3493 SdHoareTripleChecker+Valid, 42.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 3493 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 40.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 982 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 12276 IncrementalHoareTripleChecker+Invalid, 13260 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 982 mSolverCounterUnsat, 0 mSDtfsCounter, 12276 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1005 GetRequests, 204 SyntacticMatches, 13 SemanticMatches, 788 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23790 ImplicationChecksByTransitivity, 228.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=61916occurred in iteration=11, InterpolantAutomatonStates: 672, 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: 0.1s SsaConstructionTime, 1.0s SatisfiabilityAnalysisTime, 44.9s InterpolantComputationTime, 400 NumberOfCodeBlocks, 400 NumberOfCodeBlocksAsserted, 33 NumberOfCheckSat, 554 ConstructedInterpolants, 0 QuantifiedInterpolants, 24919 SizeOfPredicates, 87 NumberOfNonLiveVariables, 1304 ConjunctsInSsa, 279 ConjunctsInUnsatCore, 32 InterpolantComputations, 2 PerfectInterpolantSequences, 2/157 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2022-12-05 21:32:58,348 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...