/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-ring.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.repeated-lipton-a802222-m [2022-12-12 15:44:24,954 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-12 15:44:24,956 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-12 15:44:24,995 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-12 15:44:24,995 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-12 15:44:24,998 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-12 15:44:25,001 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-12 15:44:25,021 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-12 15:44:25,022 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-12 15:44:25,023 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-12 15:44:25,024 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-12 15:44:25,025 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-12 15:44:25,025 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-12 15:44:25,026 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-12 15:44:25,027 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-12 15:44:25,028 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-12 15:44:25,029 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-12 15:44:25,029 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-12 15:44:25,031 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-12 15:44:25,033 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-12 15:44:25,034 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-12 15:44:25,042 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-12 15:44:25,043 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-12 15:44:25,045 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-12 15:44:25,050 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-12 15:44:25,050 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-12 15:44:25,050 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-12 15:44:25,051 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-12 15:44:25,051 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-12 15:44:25,052 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-12 15:44:25,052 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-12 15:44:25,053 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-12 15:44:25,054 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-12 15:44:25,054 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-12 15:44:25,055 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-12 15:44:25,055 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-12 15:44:25,056 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-12 15:44:25,056 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-12 15:44:25,056 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-12 15:44:25,057 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-12 15:44:25,058 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-12 15:44:25,064 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 [2022-12-12 15:44:25,097 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-12 15:44:25,097 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-12 15:44:25,098 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-12 15:44:25,098 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-12 15:44:25,099 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-12 15:44:25,100 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-12 15:44:25,100 INFO L138 SettingsManager]: * Use SBE=true [2022-12-12 15:44:25,100 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-12 15:44:25,100 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-12 15:44:25,100 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-12 15:44:25,101 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-12 15:44:25,101 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-12 15:44:25,101 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-12 15:44:25,101 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-12 15:44:25,102 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-12 15:44:25,102 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-12 15:44:25,102 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-12 15:44:25,102 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-12 15:44:25,102 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-12 15:44:25,102 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-12 15:44:25,102 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-12 15:44:25,102 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-12-12 15:44:25,103 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-12 15:44:25,103 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-12 15:44:25,103 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-12 15:44:25,103 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-12 15:44:25,103 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-12 15:44:25,103 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-12 15:44:25,104 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-12 15:44:25,104 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-12 15:44:25,104 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-12-12 15:44:25,399 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-12 15:44:25,421 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-12 15:44:25,423 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-12 15:44:25,424 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-12 15:44:25,424 INFO L275 PluginConnector]: CDTParser initialized [2022-12-12 15:44:25,425 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-bad-ring.wvr.c [2022-12-12 15:44:26,598 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-12 15:44:26,800 INFO L351 CDTParser]: Found 1 translation units. [2022-12-12 15:44:26,801 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-ring.wvr.c [2022-12-12 15:44:26,808 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9e50b604b/5c2d89b458204465aeb830a20415c066/FLAG9484e4ed7 [2022-12-12 15:44:26,826 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9e50b604b/5c2d89b458204465aeb830a20415c066 [2022-12-12 15:44:26,828 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-12 15:44:26,830 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-12-12 15:44:26,832 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-12 15:44:26,832 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-12 15:44:26,835 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-12 15:44:26,836 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.12 03:44:26" (1/1) ... [2022-12-12 15:44:26,836 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6cfde794 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 03:44:26, skipping insertion in model container [2022-12-12 15:44:26,837 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.12 03:44:26" (1/1) ... [2022-12-12 15:44:26,842 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-12 15:44:26,874 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-12 15:44:27,032 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-12 15:44:27,036 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-12 15:44:27,036 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-12 15:44:27,038 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-12 15:44:27,039 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-12 15:44:27,040 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-12 15:44:27,048 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-12 15:44:27,052 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-12 15:44:27,052 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-12 15:44:27,054 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-12 15:44:27,057 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-12 15:44:27,059 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-12 15:44:27,060 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-12 15:44:27,061 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-12 15:44:27,075 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-ring.wvr.c[3947,3960] [2022-12-12 15:44:27,082 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-12 15:44:27,096 INFO L203 MainTranslator]: Completed pre-run [2022-12-12 15:44:27,112 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-12 15:44:27,115 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-12 15:44:27,115 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-12 15:44:27,116 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-12 15:44:27,117 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-12 15:44:27,121 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-12 15:44:27,129 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-12 15:44:27,131 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-12 15:44:27,131 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-12 15:44:27,132 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-12 15:44:27,135 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-12 15:44:27,136 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-12 15:44:27,136 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-12 15:44:27,137 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-12 15:44:27,141 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-ring.wvr.c[3947,3960] [2022-12-12 15:44:27,143 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-12 15:44:27,162 INFO L208 MainTranslator]: Completed translation [2022-12-12 15:44:27,162 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 03:44:27 WrapperNode [2022-12-12 15:44:27,163 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-12 15:44:27,165 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-12 15:44:27,165 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-12 15:44:27,165 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-12 15:44:27,170 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 03:44:27" (1/1) ... [2022-12-12 15:44:27,189 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 03:44:27" (1/1) ... [2022-12-12 15:44:27,217 INFO L138 Inliner]: procedures = 25, calls = 61, calls flagged for inlining = 16, calls inlined = 20, statements flattened = 315 [2022-12-12 15:44:27,217 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-12 15:44:27,218 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-12 15:44:27,218 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-12 15:44:27,218 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-12 15:44:27,225 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 03:44:27" (1/1) ... [2022-12-12 15:44:27,225 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 03:44:27" (1/1) ... [2022-12-12 15:44:27,229 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 03:44:27" (1/1) ... [2022-12-12 15:44:27,229 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 03:44:27" (1/1) ... [2022-12-12 15:44:27,236 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 03:44:27" (1/1) ... [2022-12-12 15:44:27,240 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 03:44:27" (1/1) ... [2022-12-12 15:44:27,242 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 03:44:27" (1/1) ... [2022-12-12 15:44:27,244 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 03:44:27" (1/1) ... [2022-12-12 15:44:27,246 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-12 15:44:27,251 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-12 15:44:27,251 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-12 15:44:27,251 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-12 15:44:27,252 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 03:44:27" (1/1) ... [2022-12-12 15:44:27,257 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-12 15:44:27,280 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 15:44:27,294 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) [2022-12-12 15:44:27,296 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 [2022-12-12 15:44:27,321 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-12 15:44:27,321 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-12 15:44:27,322 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-12 15:44:27,322 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-12 15:44:27,322 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-12-12 15:44:27,322 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-12-12 15:44:27,322 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-12-12 15:44:27,322 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-12-12 15:44:27,322 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-12-12 15:44:27,322 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-12-12 15:44:27,322 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-12 15:44:27,323 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-12-12 15:44:27,323 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-12-12 15:44:27,323 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-12 15:44:27,323 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-12 15:44:27,323 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-12 15:44:27,323 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-12 15:44:27,324 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2022-12-12 15:44:27,427 INFO L236 CfgBuilder]: Building ICFG [2022-12-12 15:44:27,429 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-12 15:44:27,887 INFO L277 CfgBuilder]: Performing block encoding [2022-12-12 15:44:28,031 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-12 15:44:28,031 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2022-12-12 15:44:28,033 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.12 03:44:28 BoogieIcfgContainer [2022-12-12 15:44:28,033 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-12 15:44:28,036 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-12 15:44:28,036 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-12 15:44:28,038 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-12 15:44:28,038 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.12 03:44:26" (1/3) ... [2022-12-12 15:44:28,039 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7375f598 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.12 03:44:28, skipping insertion in model container [2022-12-12 15:44:28,039 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 03:44:27" (2/3) ... [2022-12-12 15:44:28,039 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7375f598 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.12 03:44:28, skipping insertion in model container [2022-12-12 15:44:28,039 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.12 03:44:28" (3/3) ... [2022-12-12 15:44:28,040 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-ring.wvr.c [2022-12-12 15:44:28,059 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-12 15:44:28,059 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-12 15:44:28,059 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-12 15:44:28,162 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-12-12 15:44:28,201 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 233 places, 245 transitions, 514 flow [2022-12-12 15:44:28,344 INFO L130 PetriNetUnfolder]: 22/242 cut-off events. [2022-12-12 15:44:28,344 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-12-12 15:44:28,350 INFO L83 FinitePrefix]: Finished finitePrefix Result has 255 conditions, 242 events. 22/242 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 158 event pairs, 0 based on Foata normal form. 0/219 useless extension candidates. Maximal degree in co-relation 204. Up to 3 conditions per place. [2022-12-12 15:44:28,350 INFO L82 GeneralOperation]: Start removeDead. Operand has 233 places, 245 transitions, 514 flow [2022-12-12 15:44:28,356 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 220 places, 232 transitions, 482 flow [2022-12-12 15:44:28,358 INFO L203 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-12 15:44:28,373 INFO L174 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 220 places, 232 transitions, 482 flow [2022-12-12 15:44:28,378 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 220 places, 232 transitions, 482 flow [2022-12-12 15:44:28,449 INFO L130 PetriNetUnfolder]: 22/232 cut-off events. [2022-12-12 15:44:28,450 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-12-12 15:44:28,452 INFO L83 FinitePrefix]: Finished finitePrefix Result has 245 conditions, 232 events. 22/232 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 155 event pairs, 0 based on Foata normal form. 0/210 useless extension candidates. Maximal degree in co-relation 204. Up to 3 conditions per place. [2022-12-12 15:44:28,456 INFO L222 LiptonReduction]: Starting Lipton reduction on Petri net that has 220 places, 232 transitions, 482 flow [2022-12-12 15:44:28,457 INFO L226 LiptonReduction]: Number of co-enabled transitions 1962 [2022-12-12 15:44:37,757 INFO L241 LiptonReduction]: Total number of compositions: 200 [2022-12-12 15:44:37,770 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-12 15:44:37,775 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;@2723a653, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, Conditionality=CONDITIONAL_DISJUNCTIVE, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-12 15:44:37,776 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-12-12 15:44:37,782 INFO L130 PetriNetUnfolder]: 7/30 cut-off events. [2022-12-12 15:44:37,782 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-12-12 15:44:37,782 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 15:44:37,783 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 15:44:37,783 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 15:44:37,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 15:44:37,787 INFO L85 PathProgramCache]: Analyzing trace with hash -32754915, now seen corresponding path program 1 times [2022-12-12 15:44:37,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 15:44:37,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616859738] [2022-12-12 15:44:37,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 15:44:37,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 15:44:37,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 15:44:38,289 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 15:44:38,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 15:44:38,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616859738] [2022-12-12 15:44:38,290 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616859738] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 15:44:38,291 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-12 15:44:38,291 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-12 15:44:38,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069551311] [2022-12-12 15:44:38,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 15:44:38,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-12 15:44:38,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 15:44:38,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-12 15:44:38,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-12 15:44:38,320 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 31 [2022-12-12 15:44:38,321 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 31 transitions, 80 flow. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 15:44:38,322 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 15:44:38,322 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 31 [2022-12-12 15:44:38,322 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 15:44:38,504 INFO L130 PetriNetUnfolder]: 472/690 cut-off events. [2022-12-12 15:44:38,504 INFO L131 PetriNetUnfolder]: For 63/63 co-relation queries the response was YES. [2022-12-12 15:44:38,508 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1462 conditions, 690 events. 472/690 cut-off events. For 63/63 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 2132 event pairs, 135 based on Foata normal form. 30/575 useless extension candidates. Maximal degree in co-relation 1216. Up to 449 conditions per place. [2022-12-12 15:44:38,513 INFO L137 encePairwiseOnDemand]: 25/31 looper letters, 40 selfloop transitions, 3 changer transitions 0/43 dead transitions. [2022-12-12 15:44:38,513 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 43 transitions, 196 flow [2022-12-12 15:44:38,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-12 15:44:38,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-12 15:44:38,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 47 transitions. [2022-12-12 15:44:38,526 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.5053763440860215 [2022-12-12 15:44:38,527 INFO L175 Difference]: Start difference. First operand has 34 places, 31 transitions, 80 flow. Second operand 3 states and 47 transitions. [2022-12-12 15:44:38,528 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 43 transitions, 196 flow [2022-12-12 15:44:38,532 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 43 transitions, 180 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-12-12 15:44:38,534 INFO L231 Difference]: Finished difference. Result has 31 places, 32 transitions, 87 flow [2022-12-12 15:44:38,536 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=87, PETRI_PLACES=31, PETRI_TRANSITIONS=32} [2022-12-12 15:44:38,542 INFO L295 CegarLoopForPetriNet]: 34 programPoint places, -3 predicate places. [2022-12-12 15:44:38,547 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 32 transitions, 87 flow [2022-12-12 15:44:38,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 15:44:38,547 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 15:44:38,547 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 15:44:38,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-12 15:44:38,548 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 15:44:38,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 15:44:38,549 INFO L85 PathProgramCache]: Analyzing trace with hash -2034944899, now seen corresponding path program 1 times [2022-12-12 15:44:38,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 15:44:38,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916974420] [2022-12-12 15:44:38,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 15:44:38,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 15:44:38,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 15:44:38,752 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 15:44:38,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 15:44:38,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916974420] [2022-12-12 15:44:38,753 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916974420] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 15:44:38,753 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-12 15:44:38,753 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-12 15:44:38,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030260212] [2022-12-12 15:44:38,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 15:44:38,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-12 15:44:38,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 15:44:38,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-12 15:44:38,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-12 15:44:38,756 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 31 [2022-12-12 15:44:38,756 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 32 transitions, 87 flow. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 15:44:38,756 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 15:44:38,756 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 31 [2022-12-12 15:44:38,756 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 15:44:38,935 INFO L130 PetriNetUnfolder]: 529/810 cut-off events. [2022-12-12 15:44:38,935 INFO L131 PetriNetUnfolder]: For 54/54 co-relation queries the response was YES. [2022-12-12 15:44:38,936 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1920 conditions, 810 events. 529/810 cut-off events. For 54/54 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 2610 event pairs, 371 based on Foata normal form. 52/712 useless extension candidates. Maximal degree in co-relation 753. Up to 691 conditions per place. [2022-12-12 15:44:38,939 INFO L137 encePairwiseOnDemand]: 22/31 looper letters, 31 selfloop transitions, 2 changer transitions 27/60 dead transitions. [2022-12-12 15:44:38,940 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 60 transitions, 269 flow [2022-12-12 15:44:38,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-12 15:44:38,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-12 15:44:38,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 64 transitions. [2022-12-12 15:44:38,941 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.4129032258064516 [2022-12-12 15:44:38,941 INFO L175 Difference]: Start difference. First operand has 31 places, 32 transitions, 87 flow. Second operand 5 states and 64 transitions. [2022-12-12 15:44:38,941 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 60 transitions, 269 flow [2022-12-12 15:44:38,942 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 60 transitions, 266 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-12 15:44:38,943 INFO L231 Difference]: Finished difference. Result has 37 places, 33 transitions, 114 flow [2022-12-12 15:44:38,943 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=114, PETRI_PLACES=37, PETRI_TRANSITIONS=33} [2022-12-12 15:44:38,944 INFO L295 CegarLoopForPetriNet]: 34 programPoint places, 3 predicate places. [2022-12-12 15:44:38,944 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 33 transitions, 114 flow [2022-12-12 15:44:38,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 15:44:38,944 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 15:44:38,944 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 15:44:38,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-12 15:44:38,945 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 15:44:38,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 15:44:38,945 INFO L85 PathProgramCache]: Analyzing trace with hash 1375945465, now seen corresponding path program 1 times [2022-12-12 15:44:38,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 15:44:38,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253405046] [2022-12-12 15:44:38,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 15:44:38,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 15:44:38,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 15:44:39,062 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 15:44:39,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 15:44:39,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253405046] [2022-12-12 15:44:39,063 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253405046] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 15:44:39,063 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-12 15:44:39,063 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-12 15:44:39,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359469476] [2022-12-12 15:44:39,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 15:44:39,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-12 15:44:39,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 15:44:39,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-12 15:44:39,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-12 15:44:39,064 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 31 [2022-12-12 15:44:39,064 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 33 transitions, 114 flow. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 15:44:39,064 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 15:44:39,064 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 31 [2022-12-12 15:44:39,065 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 15:44:39,285 INFO L130 PetriNetUnfolder]: 759/1167 cut-off events. [2022-12-12 15:44:39,285 INFO L131 PetriNetUnfolder]: For 637/637 co-relation queries the response was YES. [2022-12-12 15:44:39,287 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3193 conditions, 1167 events. 759/1167 cut-off events. For 637/637 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 4329 event pairs, 563 based on Foata normal form. 56/1040 useless extension candidates. Maximal degree in co-relation 3178. Up to 692 conditions per place. [2022-12-12 15:44:39,291 INFO L137 encePairwiseOnDemand]: 25/31 looper letters, 32 selfloop transitions, 2 changer transitions 35/69 dead transitions. [2022-12-12 15:44:39,292 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 69 transitions, 364 flow [2022-12-12 15:44:39,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-12 15:44:39,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-12 15:44:39,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 70 transitions. [2022-12-12 15:44:39,295 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.45161290322580644 [2022-12-12 15:44:39,295 INFO L175 Difference]: Start difference. First operand has 37 places, 33 transitions, 114 flow. Second operand 5 states and 70 transitions. [2022-12-12 15:44:39,295 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 69 transitions, 364 flow [2022-12-12 15:44:39,297 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 69 transitions, 346 flow, removed 8 selfloop flow, removed 1 redundant places. [2022-12-12 15:44:39,299 INFO L231 Difference]: Finished difference. Result has 41 places, 34 transitions, 126 flow [2022-12-12 15:44:39,299 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=126, PETRI_PLACES=41, PETRI_TRANSITIONS=34} [2022-12-12 15:44:39,300 INFO L295 CegarLoopForPetriNet]: 34 programPoint places, 7 predicate places. [2022-12-12 15:44:39,300 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 34 transitions, 126 flow [2022-12-12 15:44:39,300 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 15:44:39,300 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 15:44:39,300 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 15:44:39,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-12 15:44:39,301 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 15:44:39,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 15:44:39,301 INFO L85 PathProgramCache]: Analyzing trace with hash -1587390754, now seen corresponding path program 1 times [2022-12-12 15:44:39,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 15:44:39,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45879998] [2022-12-12 15:44:39,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 15:44:39,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 15:44:39,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 15:44:39,455 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-12 15:44:39,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 15:44:39,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45879998] [2022-12-12 15:44:39,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45879998] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 15:44:39,457 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-12 15:44:39,457 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-12 15:44:39,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777997853] [2022-12-12 15:44:39,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 15:44:39,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-12 15:44:39,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 15:44:39,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-12 15:44:39,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-12 15:44:39,460 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 31 [2022-12-12 15:44:39,461 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 34 transitions, 126 flow. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 15:44:39,461 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 15:44:39,461 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 31 [2022-12-12 15:44:39,461 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 15:44:39,700 INFO L130 PetriNetUnfolder]: 797/1199 cut-off events. [2022-12-12 15:44:39,700 INFO L131 PetriNetUnfolder]: For 869/869 co-relation queries the response was YES. [2022-12-12 15:44:39,702 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3581 conditions, 1199 events. 797/1199 cut-off events. For 869/869 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 4404 event pairs, 586 based on Foata normal form. 70/1032 useless extension candidates. Maximal degree in co-relation 3558. Up to 693 conditions per place. [2022-12-12 15:44:39,705 INFO L137 encePairwiseOnDemand]: 25/31 looper letters, 33 selfloop transitions, 2 changer transitions 21/56 dead transitions. [2022-12-12 15:44:39,705 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 56 transitions, 317 flow [2022-12-12 15:44:39,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-12 15:44:39,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-12 15:44:39,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 53 transitions. [2022-12-12 15:44:39,711 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.4274193548387097 [2022-12-12 15:44:39,711 INFO L175 Difference]: Start difference. First operand has 41 places, 34 transitions, 126 flow. Second operand 4 states and 53 transitions. [2022-12-12 15:44:39,711 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 56 transitions, 317 flow [2022-12-12 15:44:39,714 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 56 transitions, 281 flow, removed 17 selfloop flow, removed 4 redundant places. [2022-12-12 15:44:39,715 INFO L231 Difference]: Finished difference. Result has 40 places, 35 transitions, 124 flow [2022-12-12 15:44:39,716 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=124, PETRI_PLACES=40, PETRI_TRANSITIONS=35} [2022-12-12 15:44:39,717 INFO L295 CegarLoopForPetriNet]: 34 programPoint places, 6 predicate places. [2022-12-12 15:44:39,717 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 35 transitions, 124 flow [2022-12-12 15:44:39,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 15:44:39,717 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 15:44:39,717 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 15:44:39,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-12 15:44:39,718 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 15:44:39,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 15:44:39,718 INFO L85 PathProgramCache]: Analyzing trace with hash 1634171101, now seen corresponding path program 1 times [2022-12-12 15:44:39,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 15:44:39,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292868540] [2022-12-12 15:44:39,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 15:44:39,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 15:44:39,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 15:44:39,930 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 15:44:39,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 15:44:39,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292868540] [2022-12-12 15:44:39,931 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292868540] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 15:44:39,931 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-12 15:44:39,931 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-12 15:44:39,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296456329] [2022-12-12 15:44:39,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 15:44:39,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-12 15:44:39,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 15:44:39,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-12 15:44:39,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-12 15:44:39,932 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 31 [2022-12-12 15:44:39,932 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 35 transitions, 124 flow. Second operand has 3 states, 2 states have (on average 13.0) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 15:44:39,932 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 15:44:39,932 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 31 [2022-12-12 15:44:39,932 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 15:44:40,113 INFO L130 PetriNetUnfolder]: 839/1229 cut-off events. [2022-12-12 15:44:40,113 INFO L131 PetriNetUnfolder]: For 364/364 co-relation queries the response was YES. [2022-12-12 15:44:40,116 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3379 conditions, 1229 events. 839/1229 cut-off events. For 364/364 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 4517 event pairs, 317 based on Foata normal form. 1/965 useless extension candidates. Maximal degree in co-relation 3357. Up to 648 conditions per place. [2022-12-12 15:44:40,120 INFO L137 encePairwiseOnDemand]: 28/31 looper letters, 49 selfloop transitions, 2 changer transitions 6/57 dead transitions. [2022-12-12 15:44:40,120 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 57 transitions, 311 flow [2022-12-12 15:44:40,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-12 15:44:40,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-12 15:44:40,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 51 transitions. [2022-12-12 15:44:40,124 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.5483870967741935 [2022-12-12 15:44:40,124 INFO L175 Difference]: Start difference. First operand has 40 places, 35 transitions, 124 flow. Second operand 3 states and 51 transitions. [2022-12-12 15:44:40,124 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 57 transitions, 311 flow [2022-12-12 15:44:40,125 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 57 transitions, 307 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-12-12 15:44:40,126 INFO L231 Difference]: Finished difference. Result has 41 places, 36 transitions, 134 flow [2022-12-12 15:44:40,126 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=134, PETRI_PLACES=41, PETRI_TRANSITIONS=36} [2022-12-12 15:44:40,129 INFO L295 CegarLoopForPetriNet]: 34 programPoint places, 7 predicate places. [2022-12-12 15:44:40,129 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 36 transitions, 134 flow [2022-12-12 15:44:40,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 13.0) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 15:44:40,129 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 15:44:40,129 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 15:44:40,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-12 15:44:40,130 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 15:44:40,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 15:44:40,130 INFO L85 PathProgramCache]: Analyzing trace with hash 1253665788, now seen corresponding path program 1 times [2022-12-12 15:44:40,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 15:44:40,130 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460406430] [2022-12-12 15:44:40,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 15:44:40,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 15:44:40,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 15:44:40,314 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-12 15:44:40,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 15:44:40,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460406430] [2022-12-12 15:44:40,314 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460406430] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 15:44:40,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1837610990] [2022-12-12 15:44:40,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 15:44:40,315 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 15:44:40,315 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 15:44:40,318 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) [2022-12-12 15:44:40,364 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-12 15:44:40,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 15:44:40,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-12 15:44:40,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 15:44:40,670 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-12 15:44:40,671 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 15:44:40,758 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-12 15:44:40,758 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1837610990] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 15:44:40,758 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 15:44:40,759 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-12-12 15:44:40,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190761189] [2022-12-12 15:44:40,759 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 15:44:40,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-12 15:44:40,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 15:44:40,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-12 15:44:40,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2022-12-12 15:44:40,760 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 31 [2022-12-12 15:44:40,760 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 36 transitions, 134 flow. Second operand has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 15:44:40,760 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 15:44:40,760 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 31 [2022-12-12 15:44:40,760 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 15:44:41,080 INFO L130 PetriNetUnfolder]: 1307/1960 cut-off events. [2022-12-12 15:44:41,080 INFO L131 PetriNetUnfolder]: For 843/843 co-relation queries the response was YES. [2022-12-12 15:44:41,084 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5570 conditions, 1960 events. 1307/1960 cut-off events. For 843/843 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 8064 event pairs, 691 based on Foata normal form. 74/1636 useless extension candidates. Maximal degree in co-relation 3488. Up to 1229 conditions per place. [2022-12-12 15:44:41,090 INFO L137 encePairwiseOnDemand]: 25/31 looper letters, 34 selfloop transitions, 3 changer transitions 40/77 dead transitions. [2022-12-12 15:44:41,090 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 77 transitions, 423 flow [2022-12-12 15:44:41,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-12 15:44:41,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-12 15:44:41,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 70 transitions. [2022-12-12 15:44:41,091 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.3763440860215054 [2022-12-12 15:44:41,091 INFO L175 Difference]: Start difference. First operand has 41 places, 36 transitions, 134 flow. Second operand 6 states and 70 transitions. [2022-12-12 15:44:41,091 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 77 transitions, 423 flow [2022-12-12 15:44:41,093 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 77 transitions, 420 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-12 15:44:41,094 INFO L231 Difference]: Finished difference. Result has 48 places, 37 transitions, 158 flow [2022-12-12 15:44:41,094 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=158, PETRI_PLACES=48, PETRI_TRANSITIONS=37} [2022-12-12 15:44:41,094 INFO L295 CegarLoopForPetriNet]: 34 programPoint places, 14 predicate places. [2022-12-12 15:44:41,094 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 37 transitions, 158 flow [2022-12-12 15:44:41,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 15:44:41,095 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 15:44:41,095 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 15:44:41,106 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-12 15:44:41,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-12-12 15:44:41,301 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 15:44:41,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 15:44:41,301 INFO L85 PathProgramCache]: Analyzing trace with hash 179740240, now seen corresponding path program 2 times [2022-12-12 15:44:41,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 15:44:41,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104872902] [2022-12-12 15:44:41,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 15:44:41,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 15:44:41,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 15:44:41,500 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-12 15:44:41,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 15:44:41,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104872902] [2022-12-12 15:44:41,501 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104872902] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 15:44:41,501 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-12 15:44:41,501 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-12 15:44:41,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097169521] [2022-12-12 15:44:41,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 15:44:41,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-12 15:44:41,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 15:44:41,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-12 15:44:41,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-12 15:44:41,502 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 31 [2022-12-12 15:44:41,502 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 37 transitions, 158 flow. Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 15:44:41,503 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 15:44:41,503 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 31 [2022-12-12 15:44:41,503 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 15:44:41,648 INFO L130 PetriNetUnfolder]: 658/965 cut-off events. [2022-12-12 15:44:41,649 INFO L131 PetriNetUnfolder]: For 843/843 co-relation queries the response was YES. [2022-12-12 15:44:41,651 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3139 conditions, 965 events. 658/965 cut-off events. For 843/843 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 3029 event pairs, 269 based on Foata normal form. 38/758 useless extension candidates. Maximal degree in co-relation 3112. Up to 516 conditions per place. [2022-12-12 15:44:41,654 INFO L137 encePairwiseOnDemand]: 27/31 looper letters, 42 selfloop transitions, 3 changer transitions 5/50 dead transitions. [2022-12-12 15:44:41,654 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 50 transitions, 314 flow [2022-12-12 15:44:41,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-12 15:44:41,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-12 15:44:41,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 44 transitions. [2022-12-12 15:44:41,656 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.4731182795698925 [2022-12-12 15:44:41,656 INFO L175 Difference]: Start difference. First operand has 48 places, 37 transitions, 158 flow. Second operand 3 states and 44 transitions. [2022-12-12 15:44:41,656 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 50 transitions, 314 flow [2022-12-12 15:44:41,659 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 50 transitions, 286 flow, removed 12 selfloop flow, removed 4 redundant places. [2022-12-12 15:44:41,660 INFO L231 Difference]: Finished difference. Result has 45 places, 39 transitions, 167 flow [2022-12-12 15:44:41,660 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=167, PETRI_PLACES=45, PETRI_TRANSITIONS=39} [2022-12-12 15:44:41,661 INFO L295 CegarLoopForPetriNet]: 34 programPoint places, 11 predicate places. [2022-12-12 15:44:41,661 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 39 transitions, 167 flow [2022-12-12 15:44:41,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 15:44:41,661 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 15:44:41,661 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 15:44:41,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-12 15:44:41,662 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 15:44:41,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 15:44:41,662 INFO L85 PathProgramCache]: Analyzing trace with hash -134228376, now seen corresponding path program 3 times [2022-12-12 15:44:41,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 15:44:41,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751163913] [2022-12-12 15:44:41,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 15:44:41,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 15:44:41,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 15:44:42,579 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-12 15:44:42,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 15:44:42,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751163913] [2022-12-12 15:44:42,580 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751163913] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 15:44:42,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1463791677] [2022-12-12 15:44:42,580 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-12 15:44:42,580 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 15:44:42,580 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 15:44:42,582 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) [2022-12-12 15:44:42,584 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-12 15:44:42,750 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-12 15:44:42,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 15:44:42,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-12 15:44:42,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 15:44:42,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-12 15:44:42,981 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-12-12 15:44:43,025 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-12-12 15:44:43,054 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-12 15:44:43,054 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 15:44:43,187 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 15:44:43,188 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 38 [2022-12-12 15:44:43,213 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2022-12-12 15:44:43,385 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-12 15:44:43,385 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1463791677] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 15:44:43,385 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 15:44:43,385 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 10] total 26 [2022-12-12 15:44:43,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324577580] [2022-12-12 15:44:43,386 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 15:44:43,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-12-12 15:44:43,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 15:44:43,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-12-12 15:44:43,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=590, Unknown=2, NotChecked=0, Total=702 [2022-12-12 15:44:43,387 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 31 [2022-12-12 15:44:43,387 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 39 transitions, 167 flow. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 15:44:43,387 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 15:44:43,388 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 31 [2022-12-12 15:44:43,388 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 15:44:46,044 INFO L130 PetriNetUnfolder]: 2788/4141 cut-off events. [2022-12-12 15:44:46,044 INFO L131 PetriNetUnfolder]: For 2976/2976 co-relation queries the response was YES. [2022-12-12 15:44:46,051 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13577 conditions, 4141 events. 2788/4141 cut-off events. For 2976/2976 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 18907 event pairs, 445 based on Foata normal form. 56/3146 useless extension candidates. Maximal degree in co-relation 7052. Up to 1723 conditions per place. [2022-12-12 15:44:46,066 INFO L137 encePairwiseOnDemand]: 21/31 looper letters, 316 selfloop transitions, 61 changer transitions 23/400 dead transitions. [2022-12-12 15:44:46,066 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 400 transitions, 2569 flow [2022-12-12 15:44:46,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-12-12 15:44:46,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2022-12-12 15:44:46,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 361 transitions. [2022-12-12 15:44:46,068 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.35288367546432065 [2022-12-12 15:44:46,068 INFO L175 Difference]: Start difference. First operand has 45 places, 39 transitions, 167 flow. Second operand 33 states and 361 transitions. [2022-12-12 15:44:46,068 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 400 transitions, 2569 flow [2022-12-12 15:44:46,073 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 400 transitions, 2490 flow, removed 26 selfloop flow, removed 1 redundant places. [2022-12-12 15:44:46,077 INFO L231 Difference]: Finished difference. Result has 99 places, 106 transitions, 761 flow [2022-12-12 15:44:46,077 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=761, PETRI_PLACES=99, PETRI_TRANSITIONS=106} [2022-12-12 15:44:46,077 INFO L295 CegarLoopForPetriNet]: 34 programPoint places, 65 predicate places. [2022-12-12 15:44:46,078 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 106 transitions, 761 flow [2022-12-12 15:44:46,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 15:44:46,078 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 15:44:46,078 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 15:44:46,089 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-12-12 15:44:46,285 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,SelfDestructingSolverStorable7 [2022-12-12 15:44:46,285 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 15:44:46,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 15:44:46,285 INFO L85 PathProgramCache]: Analyzing trace with hash -808615586, now seen corresponding path program 4 times [2022-12-12 15:44:46,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 15:44:46,286 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421481284] [2022-12-12 15:44:46,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 15:44:46,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 15:44:46,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 15:44:47,022 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-12 15:44:47,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 15:44:47,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421481284] [2022-12-12 15:44:47,022 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421481284] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 15:44:47,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935707002] [2022-12-12 15:44:47,023 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-12 15:44:47,023 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 15:44:47,023 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 15:44:47,024 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) [2022-12-12 15:44:47,050 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-12 15:44:47,210 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-12 15:44:47,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 15:44:47,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-12 15:44:47,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 15:44:47,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-12 15:44:47,323 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-12-12 15:44:47,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-12 15:44:47,356 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-12-12 15:44:47,381 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-12-12 15:44:47,396 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-12 15:44:47,397 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-12 15:44:47,397 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1935707002] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 15:44:47,397 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-12 15:44:47,397 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10] total 17 [2022-12-12 15:44:47,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732143011] [2022-12-12 15:44:47,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 15:44:47,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-12 15:44:47,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 15:44:47,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-12 15:44:47,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2022-12-12 15:44:47,399 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 31 [2022-12-12 15:44:47,399 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 106 transitions, 761 flow. Second operand has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 15:44:47,400 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 15:44:47,400 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 31 [2022-12-12 15:44:47,400 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 15:44:47,922 INFO L130 PetriNetUnfolder]: 1630/2505 cut-off events. [2022-12-12 15:44:47,922 INFO L131 PetriNetUnfolder]: For 16506/16506 co-relation queries the response was YES. [2022-12-12 15:44:47,931 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11516 conditions, 2505 events. 1630/2505 cut-off events. For 16506/16506 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 10745 event pairs, 227 based on Foata normal form. 42/2249 useless extension candidates. Maximal degree in co-relation 9898. Up to 1813 conditions per place. [2022-12-12 15:44:47,942 INFO L137 encePairwiseOnDemand]: 25/31 looper letters, 109 selfloop transitions, 22 changer transitions 7/138 dead transitions. [2022-12-12 15:44:47,943 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 138 transitions, 1235 flow [2022-12-12 15:44:47,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-12 15:44:47,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-12 15:44:47,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 62 transitions. [2022-12-12 15:44:47,944 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.2857142857142857 [2022-12-12 15:44:47,944 INFO L175 Difference]: Start difference. First operand has 99 places, 106 transitions, 761 flow. Second operand 7 states and 62 transitions. [2022-12-12 15:44:47,944 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 138 transitions, 1235 flow [2022-12-12 15:44:47,999 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 138 transitions, 1069 flow, removed 71 selfloop flow, removed 11 redundant places. [2022-12-12 15:44:48,002 INFO L231 Difference]: Finished difference. Result has 91 places, 100 transitions, 664 flow [2022-12-12 15:44:48,002 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=531, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=664, PETRI_PLACES=91, PETRI_TRANSITIONS=100} [2022-12-12 15:44:48,003 INFO L295 CegarLoopForPetriNet]: 34 programPoint places, 57 predicate places. [2022-12-12 15:44:48,003 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 100 transitions, 664 flow [2022-12-12 15:44:48,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 15:44:48,003 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 15:44:48,003 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 15:44:48,011 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-12 15:44:48,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 15:44:48,209 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 15:44:48,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 15:44:48,210 INFO L85 PathProgramCache]: Analyzing trace with hash 1585214351, now seen corresponding path program 1 times [2022-12-12 15:44:48,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 15:44:48,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023381767] [2022-12-12 15:44:48,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 15:44:48,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 15:44:48,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 15:44:48,384 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-12 15:44:48,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 15:44:48,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023381767] [2022-12-12 15:44:48,385 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023381767] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 15:44:48,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703395053] [2022-12-12 15:44:48,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 15:44:48,385 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 15:44:48,385 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 15:44:48,387 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) [2022-12-12 15:44:48,389 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-12 15:44:48,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 15:44:48,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 441 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-12 15:44:48,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 15:44:48,609 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-12 15:44:48,609 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 15:44:48,668 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-12 15:44:48,669 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [703395053] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 15:44:48,669 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 15:44:48,669 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2022-12-12 15:44:48,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621956151] [2022-12-12 15:44:48,669 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 15:44:48,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-12 15:44:48,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 15:44:48,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-12 15:44:48,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2022-12-12 15:44:48,670 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 31 [2022-12-12 15:44:48,670 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 100 transitions, 664 flow. Second operand has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 11 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 15:44:48,670 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 15:44:48,670 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 31 [2022-12-12 15:44:48,671 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 15:44:49,249 INFO L130 PetriNetUnfolder]: 2128/3376 cut-off events. [2022-12-12 15:44:49,249 INFO L131 PetriNetUnfolder]: For 19080/19080 co-relation queries the response was YES. [2022-12-12 15:44:49,262 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14773 conditions, 3376 events. 2128/3376 cut-off events. For 19080/19080 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 15767 event pairs, 910 based on Foata normal form. 260/3236 useless extension candidates. Maximal degree in co-relation 12045. Up to 2234 conditions per place. [2022-12-12 15:44:49,285 INFO L137 encePairwiseOnDemand]: 26/31 looper letters, 94 selfloop transitions, 7 changer transitions 66/167 dead transitions. [2022-12-12 15:44:49,285 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 167 transitions, 1428 flow [2022-12-12 15:44:49,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-12 15:44:49,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-12 15:44:49,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 61 transitions. [2022-12-12 15:44:49,287 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.3279569892473118 [2022-12-12 15:44:49,287 INFO L175 Difference]: Start difference. First operand has 91 places, 100 transitions, 664 flow. Second operand 6 states and 61 transitions. [2022-12-12 15:44:49,287 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 167 transitions, 1428 flow [2022-12-12 15:44:49,317 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 167 transitions, 1378 flow, removed 13 selfloop flow, removed 5 redundant places. [2022-12-12 15:44:49,322 INFO L231 Difference]: Finished difference. Result has 94 places, 101 transitions, 680 flow [2022-12-12 15:44:49,323 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=632, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=680, PETRI_PLACES=94, PETRI_TRANSITIONS=101} [2022-12-12 15:44:49,324 INFO L295 CegarLoopForPetriNet]: 34 programPoint places, 60 predicate places. [2022-12-12 15:44:49,324 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 101 transitions, 680 flow [2022-12-12 15:44:49,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 11 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 15:44:49,324 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 15:44:49,324 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 15:44:49,332 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-12-12 15:44:49,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 15:44:49,531 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 15:44:49,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 15:44:49,531 INFO L85 PathProgramCache]: Analyzing trace with hash 1336602586, now seen corresponding path program 2 times [2022-12-12 15:44:49,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 15:44:49,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908772837] [2022-12-12 15:44:49,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 15:44:49,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 15:44:49,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 15:44:49,737 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-12 15:44:49,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 15:44:49,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908772837] [2022-12-12 15:44:49,738 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908772837] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 15:44:49,738 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-12 15:44:49,738 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-12 15:44:49,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539817419] [2022-12-12 15:44:49,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 15:44:49,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-12 15:44:49,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 15:44:49,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-12 15:44:49,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-12 15:44:49,739 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 31 [2022-12-12 15:44:49,739 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 101 transitions, 680 flow. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 15:44:49,739 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 15:44:49,739 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 31 [2022-12-12 15:44:49,739 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 15:44:50,209 INFO L130 PetriNetUnfolder]: 1950/3007 cut-off events. [2022-12-12 15:44:50,209 INFO L131 PetriNetUnfolder]: For 18417/18417 co-relation queries the response was YES. [2022-12-12 15:44:50,222 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14438 conditions, 3007 events. 1950/3007 cut-off events. For 18417/18417 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 12849 event pairs, 367 based on Foata normal form. 112/2709 useless extension candidates. Maximal degree in co-relation 7529. Up to 1395 conditions per place. [2022-12-12 15:44:50,237 INFO L137 encePairwiseOnDemand]: 27/31 looper letters, 122 selfloop transitions, 35 changer transitions 1/158 dead transitions. [2022-12-12 15:44:50,237 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 158 transitions, 1394 flow [2022-12-12 15:44:50,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-12 15:44:50,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-12 15:44:50,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 66 transitions. [2022-12-12 15:44:50,239 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.532258064516129 [2022-12-12 15:44:50,239 INFO L175 Difference]: Start difference. First operand has 94 places, 101 transitions, 680 flow. Second operand 4 states and 66 transitions. [2022-12-12 15:44:50,239 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 158 transitions, 1394 flow [2022-12-12 15:44:50,308 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 158 transitions, 1336 flow, removed 23 selfloop flow, removed 4 redundant places. [2022-12-12 15:44:50,311 INFO L231 Difference]: Finished difference. Result has 93 places, 123 transitions, 1010 flow [2022-12-12 15:44:50,311 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=631, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1010, PETRI_PLACES=93, PETRI_TRANSITIONS=123} [2022-12-12 15:44:50,311 INFO L295 CegarLoopForPetriNet]: 34 programPoint places, 59 predicate places. [2022-12-12 15:44:50,311 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 123 transitions, 1010 flow [2022-12-12 15:44:50,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 15:44:50,312 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 15:44:50,312 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 15:44:50,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-12-12 15:44:50,312 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 15:44:50,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 15:44:50,312 INFO L85 PathProgramCache]: Analyzing trace with hash -660615008, now seen corresponding path program 3 times [2022-12-12 15:44:50,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 15:44:50,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265659077] [2022-12-12 15:44:50,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 15:44:50,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 15:44:50,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 15:44:51,474 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 15:44:51,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 15:44:51,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265659077] [2022-12-12 15:44:51,475 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265659077] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 15:44:51,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926972231] [2022-12-12 15:44:51,475 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-12 15:44:51,475 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 15:44:51,475 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 15:44:51,480 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) [2022-12-12 15:44:51,483 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-12 15:44:51,852 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-12 15:44:51,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 15:44:51,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 450 conjuncts, 38 conjunts are in the unsatisfiable core [2022-12-12 15:44:51,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 15:44:52,178 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 7 [2022-12-12 15:44:52,302 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 15:44:52,302 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 15:44:52,400 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 15:44:52,400 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 22 [2022-12-12 15:44:52,553 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 15:44:52,554 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 28 [2022-12-12 15:44:52,685 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-12 15:44:52,686 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [926972231] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-12 15:44:52,686 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-12 15:44:52,686 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [14, 12] total 32 [2022-12-12 15:44:52,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281994610] [2022-12-12 15:44:52,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 15:44:52,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-12 15:44:52,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 15:44:52,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-12 15:44:52,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=872, Unknown=0, NotChecked=0, Total=992 [2022-12-12 15:44:52,689 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 31 [2022-12-12 15:44:52,689 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 123 transitions, 1010 flow. Second operand has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 15:44:52,689 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 15:44:52,689 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 31 [2022-12-12 15:44:52,689 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 15:44:53,334 INFO L130 PetriNetUnfolder]: 2084/3307 cut-off events. [2022-12-12 15:44:53,335 INFO L131 PetriNetUnfolder]: For 23364/23364 co-relation queries the response was YES. [2022-12-12 15:44:53,349 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16456 conditions, 3307 events. 2084/3307 cut-off events. For 23364/23364 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 15040 event pairs, 683 based on Foata normal form. 104/2995 useless extension candidates. Maximal degree in co-relation 8819. Up to 2767 conditions per place. [2022-12-12 15:44:53,365 INFO L137 encePairwiseOnDemand]: 21/31 looper letters, 135 selfloop transitions, 16 changer transitions 29/180 dead transitions. [2022-12-12 15:44:53,365 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 180 transitions, 1821 flow [2022-12-12 15:44:53,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-12 15:44:53,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-12 15:44:53,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 69 transitions. [2022-12-12 15:44:53,366 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.2782258064516129 [2022-12-12 15:44:53,366 INFO L175 Difference]: Start difference. First operand has 93 places, 123 transitions, 1010 flow. Second operand 8 states and 69 transitions. [2022-12-12 15:44:53,367 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 180 transitions, 1821 flow [2022-12-12 15:44:53,409 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 180 transitions, 1731 flow, removed 45 selfloop flow, removed 0 redundant places. [2022-12-12 15:44:53,412 INFO L231 Difference]: Finished difference. Result has 105 places, 133 transitions, 1126 flow [2022-12-12 15:44:53,413 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=964, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1126, PETRI_PLACES=105, PETRI_TRANSITIONS=133} [2022-12-12 15:44:53,413 INFO L295 CegarLoopForPetriNet]: 34 programPoint places, 71 predicate places. [2022-12-12 15:44:53,414 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 133 transitions, 1126 flow [2022-12-12 15:44:53,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 15:44:53,414 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 15:44:53,414 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 15:44:53,425 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-12-12 15:44:53,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-12-12 15:44:53,621 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 15:44:53,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 15:44:53,621 INFO L85 PathProgramCache]: Analyzing trace with hash 1426699540, now seen corresponding path program 4 times [2022-12-12 15:44:53,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 15:44:53,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890445109] [2022-12-12 15:44:53,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 15:44:53,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 15:44:53,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 15:44:55,039 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 15:44:55,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 15:44:55,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890445109] [2022-12-12 15:44:55,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890445109] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 15:44:55,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771063399] [2022-12-12 15:44:55,040 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-12 15:44:55,040 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 15:44:55,040 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 15:44:55,044 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) [2022-12-12 15:44:55,046 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-12 15:44:55,219 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-12 15:44:55,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 15:44:55,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 450 conjuncts, 46 conjunts are in the unsatisfiable core [2022-12-12 15:44:55,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 15:44:55,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-12 15:44:55,601 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-12-12 15:44:55,848 INFO L321 Elim1Store]: treesize reduction 10, result has 80.8 percent of original size [2022-12-12 15:44:55,849 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 53 [2022-12-12 15:44:55,950 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 15:44:55,950 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 15:44:56,498 INFO L321 Elim1Store]: treesize reduction 8, result has 92.1 percent of original size [2022-12-12 15:44:56,499 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 184 treesize of output 220 [2022-12-12 15:44:56,532 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 15:44:56,533 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 116 treesize of output 124 [2022-12-12 15:44:58,104 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 15:44:58,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1771063399] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 15:44:58,105 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 15:44:58,105 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 43 [2022-12-12 15:44:58,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228277610] [2022-12-12 15:44:58,105 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 15:44:58,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-12-12 15:44:58,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 15:44:58,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-12-12 15:44:58,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=1688, Unknown=10, NotChecked=0, Total=1892 [2022-12-12 15:44:58,107 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 31 [2022-12-12 15:44:58,107 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 133 transitions, 1126 flow. Second operand has 44 states, 44 states have (on average 1.9545454545454546) internal successors, (86), 43 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 15:44:58,107 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 15:44:58,107 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 31 [2022-12-12 15:44:58,107 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 15:45:23,434 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-12 15:45:30,503 INFO L130 PetriNetUnfolder]: 6046/9721 cut-off events. [2022-12-12 15:45:30,503 INFO L131 PetriNetUnfolder]: For 71214/71214 co-relation queries the response was YES. [2022-12-12 15:45:30,542 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48826 conditions, 9721 events. 6046/9721 cut-off events. For 71214/71214 co-relation queries the response was YES. Maximal size of possible extension queue 305. Compared 56950 event pairs, 846 based on Foata normal form. 364/8875 useless extension candidates. Maximal degree in co-relation 30891. Up to 4077 conditions per place. [2022-12-12 15:45:30,584 INFO L137 encePairwiseOnDemand]: 16/31 looper letters, 567 selfloop transitions, 330 changer transitions 191/1088 dead transitions. [2022-12-12 15:45:30,584 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 1088 transitions, 10669 flow [2022-12-12 15:45:30,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-12-12 15:45:30,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2022-12-12 15:45:30,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 712 transitions. [2022-12-12 15:45:30,588 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.25519713261648747 [2022-12-12 15:45:30,589 INFO L175 Difference]: Start difference. First operand has 105 places, 133 transitions, 1126 flow. Second operand 90 states and 712 transitions. [2022-12-12 15:45:30,589 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 1088 transitions, 10669 flow [2022-12-12 15:45:30,848 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 1088 transitions, 10454 flow, removed 96 selfloop flow, removed 4 redundant places. [2022-12-12 15:45:30,863 INFO L231 Difference]: Finished difference. Result has 215 places, 481 transitions, 5924 flow [2022-12-12 15:45:30,863 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1097, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=90, PETRI_FLOW=5924, PETRI_PLACES=215, PETRI_TRANSITIONS=481} [2022-12-12 15:45:30,864 INFO L295 CegarLoopForPetriNet]: 34 programPoint places, 181 predicate places. [2022-12-12 15:45:30,864 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 481 transitions, 5924 flow [2022-12-12 15:45:30,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.9545454545454546) internal successors, (86), 43 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 15:45:30,866 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 15:45:30,866 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 15:45:30,874 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-12-12 15:45:31,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 15:45:31,072 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 15:45:31,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 15:45:31,073 INFO L85 PathProgramCache]: Analyzing trace with hash 334456152, now seen corresponding path program 5 times [2022-12-12 15:45:31,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 15:45:31,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047331170] [2022-12-12 15:45:31,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 15:45:31,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 15:45:31,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 15:45:32,336 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 15:45:32,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 15:45:32,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047331170] [2022-12-12 15:45:32,337 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047331170] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 15:45:32,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246059816] [2022-12-12 15:45:32,337 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-12 15:45:32,337 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 15:45:32,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 15:45:32,339 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) [2022-12-12 15:45:32,341 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-12 15:45:32,518 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-12 15:45:32,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 15:45:32,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 450 conjuncts, 34 conjunts are in the unsatisfiable core [2022-12-12 15:45:32,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 15:45:32,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-12 15:45:32,988 INFO L321 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2022-12-12 15:45:32,988 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 46 [2022-12-12 15:45:32,999 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-12-12 15:45:33,095 INFO L321 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2022-12-12 15:45:33,096 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 15 [2022-12-12 15:45:33,199 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 15:45:33,200 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 15:45:33,570 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 15:45:33,570 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 63 treesize of output 131 [2022-12-12 15:45:33,578 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2022-12-12 15:45:34,215 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 15:45:34,216 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1246059816] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 15:45:34,216 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 15:45:34,216 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 15] total 42 [2022-12-12 15:45:34,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61804981] [2022-12-12 15:45:34,216 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 15:45:34,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-12-12 15:45:34,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 15:45:34,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-12-12 15:45:34,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1619, Unknown=2, NotChecked=0, Total=1806 [2022-12-12 15:45:34,218 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 31 [2022-12-12 15:45:34,218 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 481 transitions, 5924 flow. Second operand has 43 states, 43 states have (on average 2.046511627906977) internal successors, (88), 42 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 15:45:34,218 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 15:45:34,218 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 31 [2022-12-12 15:45:34,218 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 15:45:38,786 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.66s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-12 15:45:42,009 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-12 15:45:44,017 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-12 15:45:46,239 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-12 15:45:49,354 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-12 15:45:52,611 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-12-12 15:45:55,789 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-12-12 15:46:00,903 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-12-12 15:46:04,538 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-12-12 15:46:59,316 INFO L130 PetriNetUnfolder]: 11940/19455 cut-off events. [2022-12-12 15:46:59,316 INFO L131 PetriNetUnfolder]: For 181341/181341 co-relation queries the response was YES. [2022-12-12 15:46:59,418 INFO L83 FinitePrefix]: Finished finitePrefix Result has 112793 conditions, 19455 events. 11940/19455 cut-off events. For 181341/181341 co-relation queries the response was YES. Maximal size of possible extension queue 624. Compared 129817 event pairs, 1692 based on Foata normal form. 288/18301 useless extension candidates. Maximal degree in co-relation 110933. Up to 8731 conditions per place. [2022-12-12 15:46:59,502 INFO L137 encePairwiseOnDemand]: 15/31 looper letters, 1196 selfloop transitions, 795 changer transitions 168/2159 dead transitions. [2022-12-12 15:46:59,503 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 358 places, 2159 transitions, 26668 flow [2022-12-12 15:46:59,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 155 states. [2022-12-12 15:46:59,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2022-12-12 15:46:59,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 1176 transitions. [2022-12-12 15:46:59,508 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.24474505723204995 [2022-12-12 15:46:59,508 INFO L175 Difference]: Start difference. First operand has 215 places, 481 transitions, 5924 flow. Second operand 155 states and 1176 transitions. [2022-12-12 15:46:59,508 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 358 places, 2159 transitions, 26668 flow [2022-12-12 15:47:01,202 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 348 places, 2159 transitions, 21772 flow, removed 2429 selfloop flow, removed 10 redundant places. [2022-12-12 15:47:01,221 INFO L231 Difference]: Finished difference. Result has 397 places, 1027 transitions, 12203 flow [2022-12-12 15:47:01,221 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=4501, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=481, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=264, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=155, PETRI_FLOW=12203, PETRI_PLACES=397, PETRI_TRANSITIONS=1027} [2022-12-12 15:47:01,222 INFO L295 CegarLoopForPetriNet]: 34 programPoint places, 363 predicate places. [2022-12-12 15:47:01,222 INFO L495 AbstractCegarLoop]: Abstraction has has 397 places, 1027 transitions, 12203 flow [2022-12-12 15:47:01,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.046511627906977) internal successors, (88), 42 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 15:47:01,222 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 15:47:01,222 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 15:47:01,227 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-12-12 15:47:01,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 15:47:01,423 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 15:47:01,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 15:47:01,424 INFO L85 PathProgramCache]: Analyzing trace with hash 293898964, now seen corresponding path program 6 times [2022-12-12 15:47:01,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 15:47:01,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924501178] [2022-12-12 15:47:01,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 15:47:01,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 15:47:01,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 15:47:02,765 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 15:47:02,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 15:47:02,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924501178] [2022-12-12 15:47:02,766 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924501178] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 15:47:02,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [871449419] [2022-12-12 15:47:02,766 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-12 15:47:02,766 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 15:47:02,766 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 15:47:02,768 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) [2022-12-12 15:47:02,770 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-12 15:47:03,300 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-12-12 15:47:03,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 15:47:03,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 450 conjuncts, 42 conjunts are in the unsatisfiable core [2022-12-12 15:47:03,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 15:47:03,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-12 15:47:03,709 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-12-12 15:47:03,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-12 15:47:03,794 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-12-12 15:47:04,018 INFO L321 Elim1Store]: treesize reduction 20, result has 4.8 percent of original size [2022-12-12 15:47:04,018 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 12 [2022-12-12 15:47:04,020 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 15:47:04,020 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 15:47:04,451 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 15:47:04,451 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 517 treesize of output 537 [2022-12-12 15:47:04,476 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 15:47:04,476 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 433 treesize of output 369 [2022-12-12 15:47:04,507 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 15:47:04,508 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 304 treesize of output 294 [2022-12-12 15:47:28,968 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 15:47:28,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [871449419] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 15:47:28,968 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 15:47:28,968 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 16] total 43 [2022-12-12 15:47:28,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282380014] [2022-12-12 15:47:28,969 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 15:47:28,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-12-12 15:47:28,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 15:47:28,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-12-12 15:47:28,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=228, Invalid=1657, Unknown=7, NotChecked=0, Total=1892 [2022-12-12 15:47:28,970 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 31 [2022-12-12 15:47:28,971 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 397 places, 1027 transitions, 12203 flow. Second operand has 44 states, 44 states have (on average 2.0) internal successors, (88), 43 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 15:47:28,971 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 15:47:28,971 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 31 [2022-12-12 15:47:28,971 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 15:47:45,416 WARN L233 SmtUtils]: Spent 13.47s on a formula simplification. DAG size of input: 114 DAG size of output: 92 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-12 15:48:00,285 WARN L233 SmtUtils]: Spent 14.79s on a formula simplification. DAG size of input: 142 DAG size of output: 95 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-12 15:48:07,349 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-12 15:48:09,363 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-12 15:48:14,809 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-12 15:48:32,668 INFO L130 PetriNetUnfolder]: 14119/23739 cut-off events. [2022-12-12 15:48:32,669 INFO L131 PetriNetUnfolder]: For 203319/203319 co-relation queries the response was YES. [2022-12-12 15:48:32,910 INFO L83 FinitePrefix]: Finished finitePrefix Result has 128676 conditions, 23739 events. 14119/23739 cut-off events. For 203319/203319 co-relation queries the response was YES. Maximal size of possible extension queue 672. Compared 169733 event pairs, 1925 based on Foata normal form. 252/23261 useless extension candidates. Maximal degree in co-relation 128141. Up to 7223 conditions per place. [2022-12-12 15:48:33,011 INFO L137 encePairwiseOnDemand]: 16/31 looper letters, 693 selfloop transitions, 1174 changer transitions 64/1931 dead transitions. [2022-12-12 15:48:33,011 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 446 places, 1931 transitions, 24696 flow [2022-12-12 15:48:33,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-12-12 15:48:33,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2022-12-12 15:48:33,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 471 transitions. [2022-12-12 15:48:33,018 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.26195773081201335 [2022-12-12 15:48:33,018 INFO L175 Difference]: Start difference. First operand has 397 places, 1027 transitions, 12203 flow. Second operand 58 states and 471 transitions. [2022-12-12 15:48:33,018 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 446 places, 1931 transitions, 24696 flow [2022-12-12 15:48:35,886 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 425 places, 1931 transitions, 23572 flow, removed 463 selfloop flow, removed 21 redundant places. [2022-12-12 15:48:35,908 INFO L231 Difference]: Finished difference. Result has 446 places, 1553 transitions, 20677 flow [2022-12-12 15:48:35,909 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=11339, PETRI_DIFFERENCE_MINUEND_PLACES=368, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1027, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=667, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=304, PETRI_DIFFERENCE_SUBTRAHEND_STATES=58, PETRI_FLOW=20677, PETRI_PLACES=446, PETRI_TRANSITIONS=1553} [2022-12-12 15:48:35,910 INFO L295 CegarLoopForPetriNet]: 34 programPoint places, 412 predicate places. [2022-12-12 15:48:35,910 INFO L495 AbstractCegarLoop]: Abstraction has has 446 places, 1553 transitions, 20677 flow [2022-12-12 15:48:35,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.0) internal successors, (88), 43 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 15:48:35,910 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 15:48:35,910 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 15:48:35,916 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-12-12 15:48:36,110 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,SelfDestructingSolverStorable14 [2022-12-12 15:48:36,111 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 15:48:36,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 15:48:36,111 INFO L85 PathProgramCache]: Analyzing trace with hash -1626177964, now seen corresponding path program 7 times [2022-12-12 15:48:36,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 15:48:36,111 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601178368] [2022-12-12 15:48:36,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 15:48:36,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 15:48:36,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 15:48:37,564 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 15:48:37,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 15:48:37,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601178368] [2022-12-12 15:48:37,564 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601178368] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 15:48:37,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925230011] [2022-12-12 15:48:37,564 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-12 15:48:37,564 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 15:48:37,565 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 15:48:37,566 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) [2022-12-12 15:48:37,567 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-12 15:48:37,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 15:48:37,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 450 conjuncts, 41 conjunts are in the unsatisfiable core [2022-12-12 15:48:37,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 15:48:38,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-12 15:48:38,139 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-12-12 15:48:38,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-12 15:48:38,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-12 15:48:38,329 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-12-12 15:48:38,329 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 42 [2022-12-12 15:48:38,407 INFO L321 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2022-12-12 15:48:38,408 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 12 [2022-12-12 15:48:38,411 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-12 15:48:38,411 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 15:48:38,808 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 15:48:38,809 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 185 treesize of output 237 [2022-12-12 15:48:38,830 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 15:48:38,830 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 106 treesize of output 120 [2022-12-12 15:48:38,847 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-12-12 15:48:42,890 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-12 15:48:42,890 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [925230011] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 15:48:42,890 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 15:48:42,890 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13, 13] total 40 [2022-12-12 15:48:42,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926399316] [2022-12-12 15:48:42,891 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 15:48:42,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-12-12 15:48:42,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 15:48:42,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-12-12 15:48:42,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=1467, Unknown=26, NotChecked=0, Total=1640 [2022-12-12 15:48:42,892 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 31 [2022-12-12 15:48:42,892 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 446 places, 1553 transitions, 20677 flow. Second operand has 41 states, 41 states have (on average 2.024390243902439) internal successors, (83), 40 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 15:48:42,892 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 15:48:42,892 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 31 [2022-12-12 15:48:42,892 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 15:48:48,372 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-12 15:48:59,999 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-12 15:49:02,017 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-12 15:49:05,257 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-12 15:49:07,320 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-12 15:49:12,181 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-12 15:49:13,198 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-12 15:49:22,519 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-12 15:49:27,865 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-12 15:49:29,892 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-12 15:49:31,954 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-12 15:49:34,001 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-12 15:49:36,019 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-12 15:49:38,025 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-12 15:49:40,030 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-12 15:49:42,032 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-12 15:49:44,035 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-12 15:49:46,039 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-12 15:49:48,042 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-12 15:49:50,047 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-12 15:49:52,051 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-12 15:49:54,055 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-12 15:50:07,910 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-12 15:50:11,868 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-12 15:50:32,349 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-12-12 15:50:34,129 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-12-12 15:50:41,680 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-12 15:50:44,625 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-12-12 15:50:54,488 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-12 15:50:56,495 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-12 15:51:02,306 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-12 15:51:09,512 WARN L233 SmtUtils]: Spent 6.40s on a formula simplification. DAG size of input: 130 DAG size of output: 105 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-12 15:51:34,280 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-12 15:51:35,126 INFO L130 PetriNetUnfolder]: 26815/42692 cut-off events. [2022-12-12 15:51:35,126 INFO L131 PetriNetUnfolder]: For 385475/385475 co-relation queries the response was YES. [2022-12-12 15:51:36,343 INFO L83 FinitePrefix]: Finished finitePrefix Result has 249596 conditions, 42692 events. 26815/42692 cut-off events. For 385475/385475 co-relation queries the response was YES. Maximal size of possible extension queue 1341. Compared 314054 event pairs, 3203 based on Foata normal form. 1412/42156 useless extension candidates. Maximal degree in co-relation 248959. Up to 15963 conditions per place. [2022-12-12 15:51:36,578 INFO L137 encePairwiseOnDemand]: 16/31 looper letters, 1486 selfloop transitions, 1958 changer transitions 395/3839 dead transitions. [2022-12-12 15:51:36,579 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 519 places, 3839 transitions, 54318 flow [2022-12-12 15:51:36,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2022-12-12 15:51:36,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2022-12-12 15:51:36,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 885 transitions. [2022-12-12 15:51:36,601 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.2883675464320626 [2022-12-12 15:51:36,601 INFO L175 Difference]: Start difference. First operand has 446 places, 1553 transitions, 20677 flow. Second operand 99 states and 885 transitions. [2022-12-12 15:51:36,602 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 519 places, 3839 transitions, 54318 flow [2022-12-12 15:51:51,749 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 487 places, 3839 transitions, 51954 flow, removed 754 selfloop flow, removed 32 redundant places. [2022-12-12 15:51:51,792 INFO L231 Difference]: Finished difference. Result has 523 places, 2918 transitions, 44914 flow [2022-12-12 15:51:51,794 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=17925, PETRI_DIFFERENCE_MINUEND_PLACES=389, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1413, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=761, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=371, PETRI_DIFFERENCE_SUBTRAHEND_STATES=99, PETRI_FLOW=44914, PETRI_PLACES=523, PETRI_TRANSITIONS=2918} [2022-12-12 15:51:51,794 INFO L295 CegarLoopForPetriNet]: 34 programPoint places, 489 predicate places. [2022-12-12 15:51:51,794 INFO L495 AbstractCegarLoop]: Abstraction has has 523 places, 2918 transitions, 44914 flow [2022-12-12 15:51:51,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.024390243902439) internal successors, (83), 40 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 15:51:51,795 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 15:51:51,795 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 15:51:51,805 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-12-12 15:51:52,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-12-12 15:51:52,003 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 15:51:52,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 15:51:52,003 INFO L85 PathProgramCache]: Analyzing trace with hash -990324003, now seen corresponding path program 1 times [2022-12-12 15:51:52,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 15:51:52,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513392927] [2022-12-12 15:51:52,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 15:51:52,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 15:51:52,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 15:51:52,125 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-12 15:51:52,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 15:51:52,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513392927] [2022-12-12 15:51:52,126 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513392927] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 15:51:52,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767969460] [2022-12-12 15:51:52,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 15:51:52,126 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 15:51:52,126 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 15:51:52,128 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) [2022-12-12 15:51:52,135 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-12 15:51:52,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 15:51:52,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 470 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-12 15:51:52,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 15:51:52,412 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-12 15:51:52,412 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 15:51:52,476 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-12 15:51:52,476 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [767969460] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 15:51:52,476 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 15:51:52,476 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2022-12-12 15:51:52,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673567523] [2022-12-12 15:51:52,476 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 15:51:52,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-12 15:51:52,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 15:51:52,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-12 15:51:52,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2022-12-12 15:51:52,477 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 31 [2022-12-12 15:51:52,477 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 523 places, 2918 transitions, 44914 flow. Second operand has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 11 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) [2022-12-12 15:51:52,477 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 15:51:52,478 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 31 [2022-12-12 15:51:52,478 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 15:52:14,969 INFO L130 PetriNetUnfolder]: 25590/41823 cut-off events. [2022-12-12 15:52:14,969 INFO L131 PetriNetUnfolder]: For 474370/474370 co-relation queries the response was YES. [2022-12-12 15:52:16,326 INFO L83 FinitePrefix]: Finished finitePrefix Result has 267938 conditions, 41823 events. 25590/41823 cut-off events. For 474370/474370 co-relation queries the response was YES. Maximal size of possible extension queue 1250. Compared 314064 event pairs, 10285 based on Foata normal form. 2038/42581 useless extension candidates. Maximal degree in co-relation 267224. Up to 37330 conditions per place. [2022-12-12 15:52:16,479 INFO L137 encePairwiseOnDemand]: 26/31 looper letters, 2973 selfloop transitions, 14 changer transitions 309/3296 dead transitions. [2022-12-12 15:52:16,479 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 523 places, 3296 transitions, 57236 flow [2022-12-12 15:52:16,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-12 15:52:16,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-12 15:52:16,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 62 transitions. [2022-12-12 15:52:16,480 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.3333333333333333 [2022-12-12 15:52:16,480 INFO L175 Difference]: Start difference. First operand has 523 places, 2918 transitions, 44914 flow. Second operand 6 states and 62 transitions. [2022-12-12 15:52:16,480 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 523 places, 3296 transitions, 57236 flow [2022-12-12 15:52:36,343 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 497 places, 3296 transitions, 53661 flow, removed 1636 selfloop flow, removed 26 redundant places. [2022-12-12 15:52:36,394 INFO L231 Difference]: Finished difference. Result has 500 places, 2920 transitions, 42466 flow [2022-12-12 15:52:36,396 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=41908, PETRI_DIFFERENCE_MINUEND_PLACES=492, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2918, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2904, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=42466, PETRI_PLACES=500, PETRI_TRANSITIONS=2920} [2022-12-12 15:52:36,396 INFO L295 CegarLoopForPetriNet]: 34 programPoint places, 466 predicate places. [2022-12-12 15:52:36,396 INFO L495 AbstractCegarLoop]: Abstraction has has 500 places, 2920 transitions, 42466 flow [2022-12-12 15:52:36,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 11 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) [2022-12-12 15:52:36,397 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 15:52:36,397 INFO L214 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 15:52:36,405 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-12-12 15:52:36,602 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,SelfDestructingSolverStorable16 [2022-12-12 15:52:36,602 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 15:52:36,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 15:52:36,603 INFO L85 PathProgramCache]: Analyzing trace with hash 526670512, now seen corresponding path program 8 times [2022-12-12 15:52:36,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 15:52:36,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849580123] [2022-12-12 15:52:36,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 15:52:36,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 15:52:36,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 15:52:38,089 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 15:52:38,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 15:52:38,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849580123] [2022-12-12 15:52:38,090 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849580123] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 15:52:38,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669933702] [2022-12-12 15:52:38,090 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-12 15:52:38,090 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 15:52:38,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 15:52:38,091 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 15:52:38,093 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-12 15:52:38,310 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-12 15:52:38,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 15:52:38,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 459 conjuncts, 31 conjunts are in the unsatisfiable core [2022-12-12 15:52:38,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 15:52:38,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-12 15:52:38,549 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-12-12 15:52:38,597 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-12-12 15:52:38,684 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-12 15:52:38,684 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 15:52:38,752 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 15:52:38,752 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 22 [2022-12-12 15:52:38,961 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 15:52:38,961 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 47 [2022-12-12 15:52:38,968 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2022-12-12 15:52:39,236 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-12 15:52:39,236 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [669933702] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 15:52:39,236 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 15:52:39,236 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 11, 12] total 38 [2022-12-12 15:52:39,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718669847] [2022-12-12 15:52:39,236 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 15:52:39,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-12-12 15:52:39,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 15:52:39,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-12-12 15:52:39,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=1315, Unknown=0, NotChecked=0, Total=1482 [2022-12-12 15:52:39,237 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 31 [2022-12-12 15:52:39,238 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 500 places, 2920 transitions, 42466 flow. Second operand has 39 states, 39 states have (on average 2.230769230769231) internal successors, (87), 38 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 15:52:39,238 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 15:52:39,238 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 31 [2022-12-12 15:52:39,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 15:53:20,219 INFO L130 PetriNetUnfolder]: 38863/60633 cut-off events. [2022-12-12 15:53:20,220 INFO L131 PetriNetUnfolder]: For 852501/852501 co-relation queries the response was YES. [2022-12-12 15:53:22,349 INFO L83 FinitePrefix]: Finished finitePrefix Result has 394778 conditions, 60633 events. 38863/60633 cut-off events. For 852501/852501 co-relation queries the response was YES. Maximal size of possible extension queue 1974. Compared 453362 event pairs, 3620 based on Foata normal form. 1480/60319 useless extension candidates. Maximal degree in co-relation 394052. Up to 20609 conditions per place. [2022-12-12 15:53:22,580 INFO L137 encePairwiseOnDemand]: 17/31 looper letters, 1317 selfloop transitions, 2502 changer transitions 399/4218 dead transitions. [2022-12-12 15:53:22,580 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 568 places, 4218 transitions, 69545 flow [2022-12-12 15:53:22,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-12-12 15:53:22,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2022-12-12 15:53:22,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 523 transitions. [2022-12-12 15:53:22,583 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.2445067788686302 [2022-12-12 15:53:22,583 INFO L175 Difference]: Start difference. First operand has 500 places, 2920 transitions, 42466 flow. Second operand 69 states and 523 transitions. [2022-12-12 15:53:22,583 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 568 places, 4218 transitions, 69545 flow [2022-12-12 15:53:44,480 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 565 places, 4218 transitions, 68475 flow, removed 505 selfloop flow, removed 3 redundant places. [2022-12-12 15:53:44,542 INFO L231 Difference]: Finished difference. Result has 596 places, 3429 transitions, 58990 flow [2022-12-12 15:53:44,544 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=40318, PETRI_DIFFERENCE_MINUEND_PLACES=497, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2834, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1746, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1041, PETRI_DIFFERENCE_SUBTRAHEND_STATES=69, PETRI_FLOW=58990, PETRI_PLACES=596, PETRI_TRANSITIONS=3429} [2022-12-12 15:53:44,545 INFO L295 CegarLoopForPetriNet]: 34 programPoint places, 562 predicate places. [2022-12-12 15:53:44,545 INFO L495 AbstractCegarLoop]: Abstraction has has 596 places, 3429 transitions, 58990 flow [2022-12-12 15:53:44,545 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.230769230769231) internal successors, (87), 38 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 15:53:44,545 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 15:53:44,545 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 15:53:44,552 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-12-12 15:53:44,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-12-12 15:53:44,752 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 15:53:44,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 15:53:44,753 INFO L85 PathProgramCache]: Analyzing trace with hash -308509710, now seen corresponding path program 2 times [2022-12-12 15:53:44,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 15:53:44,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054716057] [2022-12-12 15:53:44,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 15:53:44,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 15:53:44,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 15:53:46,842 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 15:53:46,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 15:53:46,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054716057] [2022-12-12 15:53:46,843 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054716057] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 15:53:46,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [454472813] [2022-12-12 15:53:46,843 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-12 15:53:46,843 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 15:53:46,843 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 15:53:46,844 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 15:53:46,846 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-12 15:53:47,022 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-12 15:53:47,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 15:53:47,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 479 conjuncts, 53 conjunts are in the unsatisfiable core [2022-12-12 15:53:47,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 15:53:47,554 INFO L321 Elim1Store]: treesize reduction 9, result has 85.7 percent of original size [2022-12-12 15:53:47,555 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 83 treesize of output 76 [2022-12-12 15:53:47,645 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-12 15:53:47,645 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 15:53:52,697 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 15:53:52,697 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 155 treesize of output 839 Received shutdown request... [2022-12-12 15:57:41,401 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-12-12 15:57:41,402 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-12-12 15:57:41,409 WARN L249 SmtUtils]: Removed 2 from assertion stack [2022-12-12 15:57:41,411 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 4 remaining) [2022-12-12 15:57:41,416 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-12-12 15:57:41,612 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 15:57:41,612 WARN L619 AbstractCegarLoop]: Verification canceled: while CegarLoopForPetriNet was analyzing trace of length 35 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 5 for 27ms.. [2022-12-12 15:57:41,614 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 4 remaining) [2022-12-12 15:57:41,614 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2022-12-12 15:57:41,614 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2022-12-12 15:57:41,614 INFO L445 BasicCegarLoop]: Path program histogram: [8, 4, 2, 1, 1, 1, 1, 1] [2022-12-12 15:57:41,619 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-12-12 15:57:41,619 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-12-12 15:57:41,622 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.12 03:57:41 BasicIcfg [2022-12-12 15:57:41,622 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-12-12 15:57:41,623 INFO L158 Benchmark]: Toolchain (without parser) took 794793.27ms. Allocated memory was 198.2MB in the beginning and 5.8GB in the end (delta: 5.6GB). Free memory was 175.4MB in the beginning and 1.6GB in the end (delta: -1.5GB). Peak memory consumption was 5.1GB. Max. memory is 8.0GB. [2022-12-12 15:57:41,623 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 198.2MB. Free memory is still 175.1MB. There was no memory consumed. Max. memory is 8.0GB. [2022-12-12 15:57:41,623 INFO L158 Benchmark]: CACSL2BoogieTranslator took 331.50ms. Allocated memory is still 198.2MB. Free memory was 174.9MB in the beginning and 161.3MB in the end (delta: 13.6MB). Peak memory consumption was 13.6MB. Max. memory is 8.0GB. [2022-12-12 15:57:41,623 INFO L158 Benchmark]: Boogie Procedure Inliner took 52.26ms. Allocated memory is still 198.2MB. Free memory was 160.8MB in the beginning and 158.7MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-12-12 15:57:41,623 INFO L158 Benchmark]: Boogie Preprocessor took 28.87ms. Allocated memory is still 198.2MB. Free memory was 158.1MB in the beginning and 156.0MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-12-12 15:57:41,624 INFO L158 Benchmark]: RCFGBuilder took 782.40ms. Allocated memory is still 198.2MB. Free memory was 156.0MB in the beginning and 115.1MB in the end (delta: 40.9MB). Peak memory consumption was 40.9MB. Max. memory is 8.0GB. [2022-12-12 15:57:41,624 INFO L158 Benchmark]: TraceAbstraction took 793586.90ms. Allocated memory was 198.2MB in the beginning and 5.8GB in the end (delta: 5.6GB). Free memory was 114.1MB in the beginning and 1.6GB in the end (delta: -1.5GB). Peak memory consumption was 5.0GB. Max. memory is 8.0GB. [2022-12-12 15:57:41,625 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 198.2MB. Free memory is still 175.1MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 331.50ms. Allocated memory is still 198.2MB. Free memory was 174.9MB in the beginning and 161.3MB in the end (delta: 13.6MB). Peak memory consumption was 13.6MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 52.26ms. Allocated memory is still 198.2MB. Free memory was 160.8MB in the beginning and 158.7MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 28.87ms. Allocated memory is still 198.2MB. Free memory was 158.1MB in the beginning and 156.0MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 782.40ms. Allocated memory is still 198.2MB. Free memory was 156.0MB in the beginning and 115.1MB in the end (delta: 40.9MB). Peak memory consumption was 40.9MB. Max. memory is 8.0GB. * TraceAbstraction took 793586.90ms. Allocated memory was 198.2MB in the beginning and 5.8GB in the end (delta: 5.6GB). Free memory was 114.1MB in the beginning and 1.6GB in the end (delta: -1.5GB). Peak memory consumption was 5.0GB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 9.3s, 220 PlacesBefore, 34 PlacesAfterwards, 232 TransitionsBefore, 31 TransitionsAfterwards, 1962 CoEnabledTransitionPairs, 3 FixpointIterations, 0 TrivialSequentialCompositions, 0 ConcurrentSequentialCompositions, 151 TrivialYvCompositions, 35 ConcurrentYvCompositions, 14 ChoiceCompositions, 200 TotalNumberOfCompositions, Independence Relation Statistics: ConditionTransformingIndependenceRelation.Independence Queries: [ total: 1222, independent: 1198, independent conditional: 1198, independent unconditional: 0, dependent: 24, dependent conditional: 24, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ConditionTransformingIndependenceRelation.Statistics on underlying relation: DisjunctiveConditionalIndependenceRelation.Independence Queries: [ total: 1222, independent: 1198, independent conditional: 0, independent unconditional: 1198, dependent: 24, dependent conditional: 0, dependent unconditional: 24, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , DisjunctiveConditionalIndependenceRelation.Statistics on underlying relation: SemanticConditionEliminator.Independence Queries: [ total: 1222, independent: 1198, independent conditional: 0, independent unconditional: 1198, dependent: 24, dependent conditional: 0, dependent unconditional: 24, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticConditionEliminator.Statistics on underlying relation: CachedIndependenceRelation.Independence Queries: [ total: 1222, independent: 1198, independent conditional: 0, independent unconditional: 1198, dependent: 24, dependent conditional: 0, dependent unconditional: 24, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 1108, independent: 1094, independent conditional: 0, independent unconditional: 1094, dependent: 14, dependent conditional: 0, dependent unconditional: 14, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 1108, independent: 1087, independent conditional: 0, independent unconditional: 1087, dependent: 21, dependent conditional: 0, dependent unconditional: 21, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 21, independent: 7, independent conditional: 0, independent unconditional: 7, dependent: 14, dependent conditional: 0, dependent unconditional: 14, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 119, independent: 56, independent conditional: 0, independent unconditional: 56, dependent: 63, dependent conditional: 0, dependent unconditional: 63, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 1222, independent: 104, independent conditional: 0, independent unconditional: 104, dependent: 10, dependent conditional: 0, dependent unconditional: 10, unknown: 1108, unknown conditional: 0, unknown unconditional: 1108] , Statistics on independence cache: Total cache size (in pairs): 1836, Positive cache size: 1822, Positive conditional cache size: 0, Positive unconditional cache size: 1822, Negative cache size: 14, Negative conditional cache size: 0, Negative unconditional cache size: 14, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0, Eliminated conditions: 0, Maximal queried relation: -1 - TimeoutResultAtElement [Line: 150]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while CegarLoopForPetriNet was analyzing trace of length 35 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 5 for 27ms.. - TimeoutResultAtElement [Line: 144]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while CegarLoopForPetriNet was analyzing trace of length 35 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 5 for 27ms.. - TimeoutResultAtElement [Line: 143]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while CegarLoopForPetriNet was analyzing trace of length 35 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 5 for 27ms.. - TimeoutResultAtElement [Line: 142]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while CegarLoopForPetriNet was analyzing trace of length 35 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 5 for 27ms.. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 261 locations, 4 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 793.4s, OverallIterations: 19, TraceHistogramMax: 3, PathProgramHistogramMax: 8, EmptinessCheckTime: 0.0s, AutomataDifference: 491.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 9.6s, HoareTripleCheckerStatistics: 81 mSolverCounterUnknown, 7344 SdHoareTripleChecker+Valid, 109.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 7344 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 107.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 2093 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 18816 IncrementalHoareTripleChecker+Invalid, 20990 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 2093 mSolverCounterUnsat, 0 mSDtfsCounter, 18816 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1272 GetRequests, 474 SyntacticMatches, 7 SemanticMatches, 791 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26030 ImplicationChecksByTransitivity, 236.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=58990occurred in iteration=18, InterpolantAutomatonStates: 564, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 2.4s SatisfiabilityAnalysisTime, 48.9s InterpolantComputationTime, 867 NumberOfCodeBlocks, 867 NumberOfCodeBlocksAsserted, 36 NumberOfCheckSat, 1142 ConstructedInterpolants, 51 QuantifiedInterpolants, 17144 SizeOfPredicates, 122 NumberOfNonLiveVariables, 4862 ConjunctsInSsa, 289 ConjunctsInUnsatCore, 39 InterpolantComputations, 9 PerfectInterpolantSequences, 148/310 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown