/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-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/popl20-bad-ring.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-?-3902331-m [2022-09-20 23:05:39,066 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-09-20 23:05:39,067 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-09-20 23:05:39,103 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-09-20 23:05:39,104 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-09-20 23:05:39,106 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-09-20 23:05:39,110 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-09-20 23:05:39,115 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-09-20 23:05:39,118 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-09-20 23:05:39,122 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-09-20 23:05:39,123 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-09-20 23:05:39,125 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-09-20 23:05:39,125 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-09-20 23:05:39,127 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-09-20 23:05:39,128 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-09-20 23:05:39,129 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-09-20 23:05:39,130 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-09-20 23:05:39,130 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-09-20 23:05:39,134 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-09-20 23:05:39,139 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-09-20 23:05:39,140 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-09-20 23:05:39,141 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-09-20 23:05:39,143 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-09-20 23:05:39,144 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-09-20 23:05:39,148 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-09-20 23:05:39,149 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-09-20 23:05:39,149 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-09-20 23:05:39,149 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-09-20 23:05:39,150 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-09-20 23:05:39,150 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-09-20 23:05:39,151 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-09-20 23:05:39,151 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-09-20 23:05:39,153 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-09-20 23:05:39,153 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-09-20 23:05:39,154 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-09-20 23:05:39,154 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-09-20 23:05:39,155 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-09-20 23:05:39,155 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-09-20 23:05:39,155 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-09-20 23:05:39,156 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-09-20 23:05:39,156 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-09-20 23:05:39,157 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-NoLbe.epf [2022-09-20 23:05:39,185 INFO L113 SettingsManager]: Loading preferences was successful [2022-09-20 23:05:39,185 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-09-20 23:05:39,186 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-09-20 23:05:39,186 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-09-20 23:05:39,187 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-09-20 23:05:39,187 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-09-20 23:05:39,187 INFO L138 SettingsManager]: * Use SBE=true [2022-09-20 23:05:39,187 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-09-20 23:05:39,187 INFO L138 SettingsManager]: * sizeof long=4 [2022-09-20 23:05:39,187 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-09-20 23:05:39,187 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-09-20 23:05:39,188 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-09-20 23:05:39,188 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-09-20 23:05:39,188 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-09-20 23:05:39,188 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-09-20 23:05:39,188 INFO L138 SettingsManager]: * sizeof long double=12 [2022-09-20 23:05:39,188 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-09-20 23:05:39,188 INFO L138 SettingsManager]: * Use constant arrays=true [2022-09-20 23:05:39,188 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-09-20 23:05:39,189 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-09-20 23:05:39,189 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-09-20 23:05:39,189 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-09-20 23:05:39,189 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-09-20 23:05:39,189 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-09-20 23:05:39,189 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-09-20 23:05:39,190 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-09-20 23:05:39,190 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-09-20 23:05:39,190 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-09-20 23:05:39,190 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-09-20 23:05:39,190 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-09-20 23:05:39,190 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-09-20 23:05:39,190 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-09-20 23:05:39,443 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-09-20 23:05:39,464 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-09-20 23:05:39,467 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-09-20 23:05:39,468 INFO L271 PluginConnector]: Initializing CDTParser... [2022-09-20 23:05:39,471 INFO L275 PluginConnector]: CDTParser initialized [2022-09-20 23:05:39,473 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-bad-ring.wvr.c [2022-09-20 23:05:39,531 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2f87c7d3f/6b7a893febd54238a8fd87d744e0983e/FLAGd1b32a38e [2022-09-20 23:05:39,983 INFO L306 CDTParser]: Found 1 translation units. [2022-09-20 23:05:39,983 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-ring.wvr.c [2022-09-20 23:05:39,991 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2f87c7d3f/6b7a893febd54238a8fd87d744e0983e/FLAGd1b32a38e [2022-09-20 23:05:40,010 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2f87c7d3f/6b7a893febd54238a8fd87d744e0983e [2022-09-20 23:05:40,013 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-09-20 23:05:40,014 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-09-20 23:05:40,017 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-09-20 23:05:40,017 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-09-20 23:05:40,020 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-09-20 23:05:40,020 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 11:05:40" (1/1) ... [2022-09-20 23:05:40,021 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@54bfcd7e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 11:05:40, skipping insertion in model container [2022-09-20 23:05:40,021 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 11:05:40" (1/1) ... [2022-09-20 23:05:40,028 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-09-20 23:05:40,059 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-09-20 23:05:40,254 WARN L230 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] [2022-09-20 23:05:40,261 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-09-20 23:05:40,268 INFO L203 MainTranslator]: Completed pre-run [2022-09-20 23:05:40,291 WARN L230 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] [2022-09-20 23:05:40,294 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-09-20 23:05:40,307 INFO L208 MainTranslator]: Completed translation [2022-09-20 23:05:40,307 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 11:05:40 WrapperNode [2022-09-20 23:05:40,308 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-09-20 23:05:40,309 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-09-20 23:05:40,309 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-09-20 23:05:40,309 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-09-20 23:05:40,315 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 11:05:40" (1/1) ... [2022-09-20 23:05:40,323 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 11:05:40" (1/1) ... [2022-09-20 23:05:40,349 INFO L138 Inliner]: procedures = 25, calls = 61, calls flagged for inlining = 16, calls inlined = 20, statements flattened = 315 [2022-09-20 23:05:40,349 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-09-20 23:05:40,350 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-09-20 23:05:40,350 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-09-20 23:05:40,350 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-09-20 23:05:40,358 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 11:05:40" (1/1) ... [2022-09-20 23:05:40,358 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 11:05:40" (1/1) ... [2022-09-20 23:05:40,364 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 11:05:40" (1/1) ... [2022-09-20 23:05:40,365 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 11:05:40" (1/1) ... [2022-09-20 23:05:40,373 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 11:05:40" (1/1) ... [2022-09-20 23:05:40,383 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 11:05:40" (1/1) ... [2022-09-20 23:05:40,385 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 11:05:40" (1/1) ... [2022-09-20 23:05:40,391 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-09-20 23:05:40,392 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-09-20 23:05:40,392 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-09-20 23:05:40,392 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-09-20 23:05:40,393 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 11:05:40" (1/1) ... [2022-09-20 23:05:40,401 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-09-20 23:05:40,411 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 23:05:40,420 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) [2022-09-20 23:05:40,426 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 [2022-09-20 23:05:40,457 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-09-20 23:05:40,457 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-09-20 23:05:40,457 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-09-20 23:05:40,457 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-09-20 23:05:40,457 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-09-20 23:05:40,457 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-09-20 23:05:40,457 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-09-20 23:05:40,458 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-09-20 23:05:40,458 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-09-20 23:05:40,458 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-09-20 23:05:40,458 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-09-20 23:05:40,458 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-09-20 23:05:40,458 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-09-20 23:05:40,458 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-09-20 23:05:40,458 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-09-20 23:05:40,459 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-09-20 23:05:40,459 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-09-20 23:05:40,460 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-09-20 23:05:40,565 INFO L234 CfgBuilder]: Building ICFG [2022-09-20 23:05:40,567 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-09-20 23:05:40,959 INFO L275 CfgBuilder]: Performing block encoding [2022-09-20 23:05:41,149 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-09-20 23:05:41,149 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2022-09-20 23:05:41,154 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 11:05:41 BoogieIcfgContainer [2022-09-20 23:05:41,154 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-09-20 23:05:41,158 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-09-20 23:05:41,158 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-09-20 23:05:41,162 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-09-20 23:05:41,162 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.09 11:05:40" (1/3) ... [2022-09-20 23:05:41,163 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1aae3e09 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 11:05:41, skipping insertion in model container [2022-09-20 23:05:41,163 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 11:05:40" (2/3) ... [2022-09-20 23:05:41,163 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1aae3e09 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 11:05:41, skipping insertion in model container [2022-09-20 23:05:41,164 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 11:05:41" (3/3) ... [2022-09-20 23:05:41,165 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-ring.wvr.c [2022-09-20 23:05:41,184 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-09-20 23:05:41,185 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-09-20 23:05:41,185 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-09-20 23:05:41,284 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-09-20 23:05:41,333 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 255 places, 267 transitions, 558 flow [2022-09-20 23:05:41,472 INFO L130 PetriNetUnfolder]: 22/264 cut-off events. [2022-09-20 23:05:41,472 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-09-20 23:05:41,479 INFO L83 FinitePrefix]: Finished finitePrefix Result has 277 conditions, 264 events. 22/264 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 160 event pairs, 0 based on Foata normal form. 0/241 useless extension candidates. Maximal degree in co-relation 224. Up to 3 conditions per place. [2022-09-20 23:05:41,479 INFO L82 GeneralOperation]: Start removeDead. Operand has 255 places, 267 transitions, 558 flow [2022-09-20 23:05:41,489 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 241 places, 253 transitions, 524 flow [2022-09-20 23:05:41,504 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-09-20 23:05:41,512 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;@7686cf1e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-09-20 23:05:41,512 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-09-20 23:05:41,568 INFO L130 PetriNetUnfolder]: 22/252 cut-off events. [2022-09-20 23:05:41,568 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-09-20 23:05:41,568 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 23:05:41,570 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 23:05:41,570 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)] === [2022-09-20 23:05:41,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 23:05:41,575 INFO L85 PathProgramCache]: Analyzing trace with hash 285006188, now seen corresponding path program 1 times [2022-09-20 23:05:41,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 23:05:41,586 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091281063] [2022-09-20 23:05:41,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 23:05:41,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 23:05:41,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 23:05:41,858 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 23:05:41,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 23:05:41,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091281063] [2022-09-20 23:05:41,860 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091281063] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-20 23:05:41,860 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-20 23:05:41,860 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-09-20 23:05:41,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635990117] [2022-09-20 23:05:41,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-20 23:05:41,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-09-20 23:05:41,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 23:05:41,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-09-20 23:05:41,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-09-20 23:05:41,900 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 237 out of 267 [2022-09-20 23:05:41,903 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 253 transitions, 524 flow. Second operand has 2 states, 2 states have (on average 243.0) internal successors, (486), 2 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:05:41,904 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 23:05:41,904 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 237 of 267 [2022-09-20 23:05:41,904 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 23:05:42,070 INFO L130 PetriNetUnfolder]: 137/624 cut-off events. [2022-09-20 23:05:42,070 INFO L131 PetriNetUnfolder]: For 56/56 co-relation queries the response was YES. [2022-09-20 23:05:42,076 INFO L83 FinitePrefix]: Finished finitePrefix Result has 872 conditions, 624 events. 137/624 cut-off events. For 56/56 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 2454 event pairs, 74 based on Foata normal form. 97/654 useless extension candidates. Maximal degree in co-relation 622. Up to 197 conditions per place. [2022-09-20 23:05:42,080 INFO L137 encePairwiseOnDemand]: 251/267 looper letters, 13 selfloop transitions, 0 changer transitions 8/237 dead transitions. [2022-09-20 23:05:42,081 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 237 transitions, 518 flow [2022-09-20 23:05:42,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-09-20 23:05:42,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-09-20 23:05:42,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 503 transitions. [2022-09-20 23:05:42,097 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.9419475655430711 [2022-09-20 23:05:42,097 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 503 transitions. [2022-09-20 23:05:42,098 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 503 transitions. [2022-09-20 23:05:42,101 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 23:05:42,103 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 503 transitions. [2022-09-20 23:05:42,108 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 251.5) internal successors, (503), 2 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:05:42,115 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 267.0) internal successors, (801), 3 states have internal predecessors, (801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:05:42,116 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 267.0) internal successors, (801), 3 states have internal predecessors, (801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:05:42,118 INFO L175 Difference]: Start difference. First operand has 241 places, 253 transitions, 524 flow. Second operand 2 states and 503 transitions. [2022-09-20 23:05:42,118 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 237 transitions, 518 flow [2022-09-20 23:05:42,125 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 237 transitions, 506 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-09-20 23:05:42,130 INFO L231 Difference]: Finished difference. Result has 236 places, 229 transitions, 464 flow [2022-09-20 23:05:42,132 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=480, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=464, PETRI_PLACES=236, PETRI_TRANSITIONS=229} [2022-09-20 23:05:42,135 INFO L287 CegarLoopForPetriNet]: 241 programPoint places, -5 predicate places. [2022-09-20 23:05:42,136 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 229 transitions, 464 flow [2022-09-20 23:05:42,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 243.0) internal successors, (486), 2 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:05:42,137 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 23:05:42,137 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 23:05:42,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-09-20 23:05:42,138 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)] === [2022-09-20 23:05:42,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 23:05:42,139 INFO L85 PathProgramCache]: Analyzing trace with hash -2006322593, now seen corresponding path program 1 times [2022-09-20 23:05:42,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 23:05:42,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076693233] [2022-09-20 23:05:42,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 23:05:42,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 23:05:42,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 23:05:42,451 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 23:05:42,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 23:05:42,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076693233] [2022-09-20 23:05:42,452 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076693233] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-20 23:05:42,452 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-20 23:05:42,452 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-09-20 23:05:42,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765792209] [2022-09-20 23:05:42,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-20 23:05:42,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-09-20 23:05:42,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 23:05:42,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-09-20 23:05:42,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-09-20 23:05:42,456 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 230 out of 267 [2022-09-20 23:05:42,457 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 229 transitions, 464 flow. Second operand has 3 states, 3 states have (on average 236.0) internal successors, (708), 3 states have internal predecessors, (708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:05:42,458 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 23:05:42,458 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 230 of 267 [2022-09-20 23:05:42,458 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 23:05:42,581 INFO L130 PetriNetUnfolder]: 125/535 cut-off events. [2022-09-20 23:05:42,581 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2022-09-20 23:05:42,583 INFO L83 FinitePrefix]: Finished finitePrefix Result has 751 conditions, 535 events. 125/535 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1806 event pairs, 29 based on Foata normal form. 10/511 useless extension candidates. Maximal degree in co-relation 748. Up to 143 conditions per place. [2022-09-20 23:05:42,588 INFO L137 encePairwiseOnDemand]: 262/267 looper letters, 23 selfloop transitions, 4 changer transitions 0/236 dead transitions. [2022-09-20 23:05:42,589 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 236 transitions, 534 flow [2022-09-20 23:05:42,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-09-20 23:05:42,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-09-20 23:05:42,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 718 transitions. [2022-09-20 23:05:42,592 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8963795255930087 [2022-09-20 23:05:42,593 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 718 transitions. [2022-09-20 23:05:42,593 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 718 transitions. [2022-09-20 23:05:42,593 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 23:05:42,593 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 718 transitions. [2022-09-20 23:05:42,595 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 239.33333333333334) internal successors, (718), 3 states have internal predecessors, (718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:05:42,599 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 267.0) internal successors, (1068), 4 states have internal predecessors, (1068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:05:42,599 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 267.0) internal successors, (1068), 4 states have internal predecessors, (1068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:05:42,599 INFO L175 Difference]: Start difference. First operand has 236 places, 229 transitions, 464 flow. Second operand 3 states and 718 transitions. [2022-09-20 23:05:42,600 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 236 transitions, 534 flow [2022-09-20 23:05:42,602 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 236 transitions, 534 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-09-20 23:05:42,608 INFO L231 Difference]: Finished difference. Result has 231 places, 230 transitions, 482 flow [2022-09-20 23:05:42,609 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=464, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=482, PETRI_PLACES=231, PETRI_TRANSITIONS=230} [2022-09-20 23:05:42,610 INFO L287 CegarLoopForPetriNet]: 241 programPoint places, -10 predicate places. [2022-09-20 23:05:42,610 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 230 transitions, 482 flow [2022-09-20 23:05:42,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 236.0) internal successors, (708), 3 states have internal predecessors, (708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:05:42,624 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 23:05:42,625 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 23:05:42,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-09-20 23:05:42,626 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)] === [2022-09-20 23:05:42,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 23:05:42,626 INFO L85 PathProgramCache]: Analyzing trace with hash -1249829639, now seen corresponding path program 2 times [2022-09-20 23:05:42,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 23:05:42,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872431572] [2022-09-20 23:05:42,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 23:05:42,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 23:05:42,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 23:05:42,838 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 23:05:42,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 23:05:42,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872431572] [2022-09-20 23:05:42,839 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872431572] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-20 23:05:42,840 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-20 23:05:42,840 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-09-20 23:05:42,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743895068] [2022-09-20 23:05:42,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-20 23:05:42,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-09-20 23:05:42,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 23:05:42,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-09-20 23:05:42,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-09-20 23:05:42,844 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 195 out of 267 [2022-09-20 23:05:42,846 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 230 transitions, 482 flow. Second operand has 7 states, 7 states have (on average 200.85714285714286) internal successors, (1406), 7 states have internal predecessors, (1406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:05:42,846 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 23:05:42,846 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 195 of 267 [2022-09-20 23:05:42,846 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 23:05:43,104 INFO L130 PetriNetUnfolder]: 97/610 cut-off events. [2022-09-20 23:05:43,104 INFO L131 PetriNetUnfolder]: For 34/34 co-relation queries the response was YES. [2022-09-20 23:05:43,106 INFO L83 FinitePrefix]: Finished finitePrefix Result has 910 conditions, 610 events. 97/610 cut-off events. For 34/34 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 1793 event pairs, 37 based on Foata normal form. 10/586 useless extension candidates. Maximal degree in co-relation 905. Up to 170 conditions per place. [2022-09-20 23:05:43,108 INFO L137 encePairwiseOnDemand]: 253/267 looper letters, 52 selfloop transitions, 12 changer transitions 30/268 dead transitions. [2022-09-20 23:05:43,108 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 268 transitions, 751 flow [2022-09-20 23:05:43,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-09-20 23:05:43,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-09-20 23:05:43,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2047 transitions. [2022-09-20 23:05:43,113 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7666666666666667 [2022-09-20 23:05:43,113 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2047 transitions. [2022-09-20 23:05:43,113 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2047 transitions. [2022-09-20 23:05:43,114 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 23:05:43,115 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2047 transitions. [2022-09-20 23:05:43,119 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 204.7) internal successors, (2047), 10 states have internal predecessors, (2047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:05:43,126 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 267.0) internal successors, (2937), 11 states have internal predecessors, (2937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:05:43,128 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 267.0) internal successors, (2937), 11 states have internal predecessors, (2937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:05:43,128 INFO L175 Difference]: Start difference. First operand has 231 places, 230 transitions, 482 flow. Second operand 10 states and 2047 transitions. [2022-09-20 23:05:43,129 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 268 transitions, 751 flow [2022-09-20 23:05:43,131 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 268 transitions, 747 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-09-20 23:05:43,135 INFO L231 Difference]: Finished difference. Result has 242 places, 233 transitions, 533 flow [2022-09-20 23:05:43,136 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=478, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=533, PETRI_PLACES=242, PETRI_TRANSITIONS=233} [2022-09-20 23:05:43,136 INFO L287 CegarLoopForPetriNet]: 241 programPoint places, 1 predicate places. [2022-09-20 23:05:43,137 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 233 transitions, 533 flow [2022-09-20 23:05:43,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 200.85714285714286) internal successors, (1406), 7 states have internal predecessors, (1406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:05:43,138 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 23:05:43,138 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 23:05:43,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-09-20 23:05:43,138 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)] === [2022-09-20 23:05:43,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 23:05:43,139 INFO L85 PathProgramCache]: Analyzing trace with hash 1102114435, now seen corresponding path program 1 times [2022-09-20 23:05:43,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 23:05:43,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087484373] [2022-09-20 23:05:43,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 23:05:43,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 23:05:43,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 23:05:43,306 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-09-20 23:05:43,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 23:05:43,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087484373] [2022-09-20 23:05:43,307 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087484373] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-20 23:05:43,307 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-20 23:05:43,307 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-09-20 23:05:43,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827313825] [2022-09-20 23:05:43,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-20 23:05:43,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-09-20 23:05:43,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 23:05:43,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-09-20 23:05:43,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-09-20 23:05:43,310 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 194 out of 267 [2022-09-20 23:05:43,311 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 233 transitions, 533 flow. Second operand has 5 states, 5 states have (on average 203.0) internal successors, (1015), 5 states have internal predecessors, (1015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:05:43,311 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 23:05:43,311 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 194 of 267 [2022-09-20 23:05:43,312 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 23:05:43,544 INFO L130 PetriNetUnfolder]: 193/740 cut-off events. [2022-09-20 23:05:43,545 INFO L131 PetriNetUnfolder]: For 286/286 co-relation queries the response was YES. [2022-09-20 23:05:43,547 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1407 conditions, 740 events. 193/740 cut-off events. For 286/286 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 3229 event pairs, 44 based on Foata normal form. 1/702 useless extension candidates. Maximal degree in co-relation 1399. Up to 191 conditions per place. [2022-09-20 23:05:43,550 INFO L137 encePairwiseOnDemand]: 262/267 looper letters, 57 selfloop transitions, 2 changer transitions 7/248 dead transitions. [2022-09-20 23:05:43,550 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 248 transitions, 710 flow [2022-09-20 23:05:43,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-09-20 23:05:43,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-09-20 23:05:43,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1035 transitions. [2022-09-20 23:05:43,553 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7752808988764045 [2022-09-20 23:05:43,553 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1035 transitions. [2022-09-20 23:05:43,553 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1035 transitions. [2022-09-20 23:05:43,554 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 23:05:43,554 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1035 transitions. [2022-09-20 23:05:43,556 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 207.0) internal successors, (1035), 5 states have internal predecessors, (1035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:05:43,559 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 267.0) internal successors, (1602), 6 states have internal predecessors, (1602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:05:43,560 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 267.0) internal successors, (1602), 6 states have internal predecessors, (1602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:05:43,560 INFO L175 Difference]: Start difference. First operand has 242 places, 233 transitions, 533 flow. Second operand 5 states and 1035 transitions. [2022-09-20 23:05:43,560 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 248 transitions, 710 flow [2022-09-20 23:05:43,563 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 248 transitions, 693 flow, removed 0 selfloop flow, removed 5 redundant places. [2022-09-20 23:05:43,566 INFO L231 Difference]: Finished difference. Result has 242 places, 233 transitions, 528 flow [2022-09-20 23:05:43,567 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=516, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=528, PETRI_PLACES=242, PETRI_TRANSITIONS=233} [2022-09-20 23:05:43,568 INFO L287 CegarLoopForPetriNet]: 241 programPoint places, 1 predicate places. [2022-09-20 23:05:43,568 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 233 transitions, 528 flow [2022-09-20 23:05:43,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 203.0) internal successors, (1015), 5 states have internal predecessors, (1015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:05:43,576 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 23:05:43,577 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 23:05:43,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-09-20 23:05:43,577 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)] === [2022-09-20 23:05:43,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 23:05:43,578 INFO L85 PathProgramCache]: Analyzing trace with hash -1467219341, now seen corresponding path program 1 times [2022-09-20 23:05:43,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 23:05:43,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31788681] [2022-09-20 23:05:43,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 23:05:43,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 23:05:43,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 23:05:43,753 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-09-20 23:05:43,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 23:05:43,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31788681] [2022-09-20 23:05:43,754 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31788681] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-20 23:05:43,754 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-20 23:05:43,754 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-09-20 23:05:43,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979856726] [2022-09-20 23:05:43,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-20 23:05:43,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-09-20 23:05:43,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 23:05:43,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-09-20 23:05:43,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-09-20 23:05:43,757 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 230 out of 267 [2022-09-20 23:05:43,758 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 233 transitions, 528 flow. Second operand has 3 states, 3 states have (on average 236.66666666666666) internal successors, (710), 3 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:05:43,758 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 23:05:43,759 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 230 of 267 [2022-09-20 23:05:43,759 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 23:05:43,840 INFO L130 PetriNetUnfolder]: 64/372 cut-off events. [2022-09-20 23:05:43,840 INFO L131 PetriNetUnfolder]: For 96/96 co-relation queries the response was YES. [2022-09-20 23:05:43,841 INFO L83 FinitePrefix]: Finished finitePrefix Result has 608 conditions, 372 events. 64/372 cut-off events. For 96/96 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 636 event pairs, 17 based on Foata normal form. 11/368 useless extension candidates. Maximal degree in co-relation 597. Up to 80 conditions per place. [2022-09-20 23:05:43,843 INFO L137 encePairwiseOnDemand]: 262/267 looper letters, 22 selfloop transitions, 4 changer transitions 0/237 dead transitions. [2022-09-20 23:05:43,843 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 237 transitions, 596 flow [2022-09-20 23:05:43,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-09-20 23:05:43,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-09-20 23:05:43,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 716 transitions. [2022-09-20 23:05:43,847 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8938826466916354 [2022-09-20 23:05:43,850 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 716 transitions. [2022-09-20 23:05:43,850 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 716 transitions. [2022-09-20 23:05:43,851 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 23:05:43,851 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 716 transitions. [2022-09-20 23:05:43,852 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 238.66666666666666) internal successors, (716), 3 states have internal predecessors, (716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:05:43,854 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 267.0) internal successors, (1068), 4 states have internal predecessors, (1068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:05:43,854 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 267.0) internal successors, (1068), 4 states have internal predecessors, (1068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:05:43,855 INFO L175 Difference]: Start difference. First operand has 242 places, 233 transitions, 528 flow. Second operand 3 states and 716 transitions. [2022-09-20 23:05:43,855 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 237 transitions, 596 flow [2022-09-20 23:05:43,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 237 transitions, 588 flow, removed 3 selfloop flow, removed 3 redundant places. [2022-09-20 23:05:43,862 INFO L231 Difference]: Finished difference. Result has 240 places, 234 transitions, 538 flow [2022-09-20 23:05:43,863 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=520, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=229, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=538, PETRI_PLACES=240, PETRI_TRANSITIONS=234} [2022-09-20 23:05:43,865 INFO L287 CegarLoopForPetriNet]: 241 programPoint places, -1 predicate places. [2022-09-20 23:05:43,865 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 234 transitions, 538 flow [2022-09-20 23:05:43,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 236.66666666666666) internal successors, (710), 3 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:05:43,866 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 23:05:43,866 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 23:05:43,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-09-20 23:05:43,866 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)] === [2022-09-20 23:05:43,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 23:05:43,867 INFO L85 PathProgramCache]: Analyzing trace with hash -1825376933, now seen corresponding path program 2 times [2022-09-20 23:05:43,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 23:05:43,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614185801] [2022-09-20 23:05:43,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 23:05:43,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 23:05:43,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 23:05:44,002 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-09-20 23:05:44,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 23:05:44,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614185801] [2022-09-20 23:05:44,003 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614185801] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-20 23:05:44,003 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-20 23:05:44,003 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-09-20 23:05:44,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907980999] [2022-09-20 23:05:44,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-20 23:05:44,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-09-20 23:05:44,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 23:05:44,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-09-20 23:05:44,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-09-20 23:05:44,007 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 199 out of 267 [2022-09-20 23:05:44,008 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 234 transitions, 538 flow. Second operand has 6 states, 6 states have (on average 206.16666666666666) internal successors, (1237), 6 states have internal predecessors, (1237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:05:44,008 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 23:05:44,008 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 199 of 267 [2022-09-20 23:05:44,009 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 23:05:44,192 INFO L130 PetriNetUnfolder]: 73/464 cut-off events. [2022-09-20 23:05:44,192 INFO L131 PetriNetUnfolder]: For 125/125 co-relation queries the response was YES. [2022-09-20 23:05:44,194 INFO L83 FinitePrefix]: Finished finitePrefix Result has 815 conditions, 464 events. 73/464 cut-off events. For 125/125 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1004 event pairs, 35 based on Foata normal form. 2/445 useless extension candidates. Maximal degree in co-relation 805. Up to 108 conditions per place. [2022-09-20 23:05:44,195 INFO L137 encePairwiseOnDemand]: 259/267 looper letters, 53 selfloop transitions, 6 changer transitions 9/247 dead transitions. [2022-09-20 23:05:44,196 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 247 transitions, 715 flow [2022-09-20 23:05:44,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-09-20 23:05:44,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-09-20 23:05:44,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1457 transitions. [2022-09-20 23:05:44,200 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7795612627073302 [2022-09-20 23:05:44,200 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1457 transitions. [2022-09-20 23:05:44,200 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1457 transitions. [2022-09-20 23:05:44,201 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 23:05:44,201 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1457 transitions. [2022-09-20 23:05:44,204 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 208.14285714285714) internal successors, (1457), 7 states have internal predecessors, (1457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:05:44,207 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 267.0) internal successors, (2136), 8 states have internal predecessors, (2136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:05:44,208 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 267.0) internal successors, (2136), 8 states have internal predecessors, (2136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:05:44,208 INFO L175 Difference]: Start difference. First operand has 240 places, 234 transitions, 538 flow. Second operand 7 states and 1457 transitions. [2022-09-20 23:05:44,208 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 247 transitions, 715 flow [2022-09-20 23:05:44,211 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 247 transitions, 711 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-09-20 23:05:44,214 INFO L231 Difference]: Finished difference. Result has 247 places, 235 transitions, 556 flow [2022-09-20 23:05:44,214 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=534, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=556, PETRI_PLACES=247, PETRI_TRANSITIONS=235} [2022-09-20 23:05:44,215 INFO L287 CegarLoopForPetriNet]: 241 programPoint places, 6 predicate places. [2022-09-20 23:05:44,215 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 235 transitions, 556 flow [2022-09-20 23:05:44,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 206.16666666666666) internal successors, (1237), 6 states have internal predecessors, (1237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:05:44,216 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 23:05:44,216 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 23:05:44,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-09-20 23:05:44,216 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)] === [2022-09-20 23:05:44,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 23:05:44,217 INFO L85 PathProgramCache]: Analyzing trace with hash 438660929, now seen corresponding path program 1 times [2022-09-20 23:05:44,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 23:05:44,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260713229] [2022-09-20 23:05:44,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 23:05:44,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 23:05:44,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 23:05:44,352 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-09-20 23:05:44,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 23:05:44,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260713229] [2022-09-20 23:05:44,353 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260713229] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-20 23:05:44,353 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-20 23:05:44,353 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-09-20 23:05:44,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296952170] [2022-09-20 23:05:44,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-20 23:05:44,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-09-20 23:05:44,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 23:05:44,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-09-20 23:05:44,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-09-20 23:05:44,356 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 199 out of 267 [2022-09-20 23:05:44,357 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 235 transitions, 556 flow. Second operand has 6 states, 6 states have (on average 206.83333333333334) internal successors, (1241), 6 states have internal predecessors, (1241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:05:44,357 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 23:05:44,358 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 199 of 267 [2022-09-20 23:05:44,358 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 23:05:44,562 INFO L130 PetriNetUnfolder]: 68/486 cut-off events. [2022-09-20 23:05:44,562 INFO L131 PetriNetUnfolder]: For 125/125 co-relation queries the response was YES. [2022-09-20 23:05:44,564 INFO L83 FinitePrefix]: Finished finitePrefix Result has 847 conditions, 486 events. 68/486 cut-off events. For 125/125 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 980 event pairs, 32 based on Foata normal form. 2/472 useless extension candidates. Maximal degree in co-relation 835. Up to 131 conditions per place. [2022-09-20 23:05:44,566 INFO L137 encePairwiseOnDemand]: 257/267 looper letters, 52 selfloop transitions, 8 changer transitions 19/258 dead transitions. [2022-09-20 23:05:44,566 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 258 transitions, 783 flow [2022-09-20 23:05:44,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-09-20 23:05:44,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-09-20 23:05:44,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1865 transitions. [2022-09-20 23:05:44,570 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7761131918435289 [2022-09-20 23:05:44,570 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1865 transitions. [2022-09-20 23:05:44,570 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1865 transitions. [2022-09-20 23:05:44,571 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 23:05:44,571 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1865 transitions. [2022-09-20 23:05:44,574 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 207.22222222222223) internal successors, (1865), 9 states have internal predecessors, (1865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:05:44,578 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 267.0) internal successors, (2670), 10 states have internal predecessors, (2670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:05:44,579 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 267.0) internal successors, (2670), 10 states have internal predecessors, (2670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:05:44,579 INFO L175 Difference]: Start difference. First operand has 247 places, 235 transitions, 556 flow. Second operand 9 states and 1865 transitions. [2022-09-20 23:05:44,579 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 258 transitions, 783 flow [2022-09-20 23:05:44,582 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 258 transitions, 765 flow, removed 1 selfloop flow, removed 5 redundant places. [2022-09-20 23:05:44,585 INFO L231 Difference]: Finished difference. Result has 251 places, 236 transitions, 572 flow [2022-09-20 23:05:44,586 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=544, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=572, PETRI_PLACES=251, PETRI_TRANSITIONS=236} [2022-09-20 23:05:44,587 INFO L287 CegarLoopForPetriNet]: 241 programPoint places, 10 predicate places. [2022-09-20 23:05:44,587 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 236 transitions, 572 flow [2022-09-20 23:05:44,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 206.83333333333334) internal successors, (1241), 6 states have internal predecessors, (1241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:05:44,588 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 23:05:44,588 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 23:05:44,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-09-20 23:05:44,588 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)] === [2022-09-20 23:05:44,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 23:05:44,589 INFO L85 PathProgramCache]: Analyzing trace with hash -1132250473, now seen corresponding path program 1 times [2022-09-20 23:05:44,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 23:05:44,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597086936] [2022-09-20 23:05:44,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 23:05:44,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 23:05:44,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 23:05:44,767 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-09-20 23:05:44,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 23:05:44,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597086936] [2022-09-20 23:05:44,767 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597086936] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 23:05:44,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103798984] [2022-09-20 23:05:44,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 23:05:44,768 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 23:05:44,768 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 23:05:44,775 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) [2022-09-20 23:05:44,802 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-09-20 23:05:44,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 23:05:44,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 545 conjuncts, 20 conjunts are in the unsatisfiable core [2022-09-20 23:05:44,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 23:05:45,509 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-09-20 23:05:45,509 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-20 23:05:45,554 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 4 [2022-09-20 23:05:46,067 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-09-20 23:05:46,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2103798984] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-20 23:05:46,067 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-20 23:05:46,068 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 11] total 23 [2022-09-20 23:05:46,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019628748] [2022-09-20 23:05:46,068 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-20 23:05:46,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-09-20 23:05:46,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 23:05:46,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-09-20 23:05:46,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2022-09-20 23:05:46,074 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 192 out of 267 [2022-09-20 23:05:46,080 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 236 transitions, 572 flow. Second operand has 23 states, 23 states have (on average 196.34782608695653) internal successors, (4516), 23 states have internal predecessors, (4516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:05:46,080 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 23:05:46,080 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 192 of 267 [2022-09-20 23:05:46,080 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 23:05:46,645 INFO L130 PetriNetUnfolder]: 89/615 cut-off events. [2022-09-20 23:05:46,646 INFO L131 PetriNetUnfolder]: For 189/189 co-relation queries the response was YES. [2022-09-20 23:05:46,648 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1105 conditions, 615 events. 89/615 cut-off events. For 189/189 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1548 event pairs, 31 based on Foata normal form. 8/601 useless extension candidates. Maximal degree in co-relation 1092. Up to 120 conditions per place. [2022-09-20 23:05:46,650 INFO L137 encePairwiseOnDemand]: 246/267 looper letters, 52 selfloop transitions, 22 changer transitions 46/292 dead transitions. [2022-09-20 23:05:46,650 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 292 transitions, 988 flow [2022-09-20 23:05:46,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-09-20 23:05:46,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2022-09-20 23:05:46,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 3954 transitions. [2022-09-20 23:05:46,659 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7404494382022472 [2022-09-20 23:05:46,660 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 3954 transitions. [2022-09-20 23:05:46,660 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 3954 transitions. [2022-09-20 23:05:46,662 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 23:05:46,662 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 3954 transitions. [2022-09-20 23:05:46,671 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 197.7) internal successors, (3954), 20 states have internal predecessors, (3954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:05:46,683 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 267.0) internal successors, (5607), 21 states have internal predecessors, (5607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:05:46,685 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 267.0) internal successors, (5607), 21 states have internal predecessors, (5607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:05:46,685 INFO L175 Difference]: Start difference. First operand has 251 places, 236 transitions, 572 flow. Second operand 20 states and 3954 transitions. [2022-09-20 23:05:46,685 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 292 transitions, 988 flow [2022-09-20 23:05:46,688 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 292 transitions, 958 flow, removed 2 selfloop flow, removed 6 redundant places. [2022-09-20 23:05:46,694 INFO L231 Difference]: Finished difference. Result has 268 places, 240 transitions, 634 flow [2022-09-20 23:05:46,695 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=554, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=236, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=634, PETRI_PLACES=268, PETRI_TRANSITIONS=240} [2022-09-20 23:05:46,697 INFO L287 CegarLoopForPetriNet]: 241 programPoint places, 27 predicate places. [2022-09-20 23:05:46,697 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 240 transitions, 634 flow [2022-09-20 23:05:46,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 196.34782608695653) internal successors, (4516), 23 states have internal predecessors, (4516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:05:46,699 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 23:05:46,700 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 23:05:46,728 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-09-20 23:05:46,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 23:05:46,916 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)] === [2022-09-20 23:05:46,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 23:05:46,917 INFO L85 PathProgramCache]: Analyzing trace with hash -1048453403, now seen corresponding path program 2 times [2022-09-20 23:05:46,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 23:05:46,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797745949] [2022-09-20 23:05:46,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 23:05:46,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 23:05:47,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 23:05:47,063 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-09-20 23:05:47,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 23:05:47,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797745949] [2022-09-20 23:05:47,063 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797745949] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-20 23:05:47,063 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-20 23:05:47,063 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-09-20 23:05:47,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617737676] [2022-09-20 23:05:47,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-20 23:05:47,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-09-20 23:05:47,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 23:05:47,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-09-20 23:05:47,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-09-20 23:05:47,066 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 216 out of 267 [2022-09-20 23:05:47,073 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 240 transitions, 634 flow. Second operand has 5 states, 5 states have (on average 222.6) internal successors, (1113), 5 states have internal predecessors, (1113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:05:47,073 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 23:05:47,074 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 216 of 267 [2022-09-20 23:05:47,074 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 23:05:47,428 INFO L130 PetriNetUnfolder]: 562/1433 cut-off events. [2022-09-20 23:05:47,428 INFO L131 PetriNetUnfolder]: For 970/1002 co-relation queries the response was YES. [2022-09-20 23:05:47,433 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3161 conditions, 1433 events. 562/1433 cut-off events. For 970/1002 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 7473 event pairs, 259 based on Foata normal form. 0/1337 useless extension candidates. Maximal degree in co-relation 3143. Up to 539 conditions per place. [2022-09-20 23:05:47,440 INFO L137 encePairwiseOnDemand]: 261/267 looper letters, 58 selfloop transitions, 6 changer transitions 0/267 dead transitions. [2022-09-20 23:05:47,440 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 267 transitions, 856 flow [2022-09-20 23:05:47,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-09-20 23:05:47,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-09-20 23:05:47,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1142 transitions. [2022-09-20 23:05:47,443 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8554307116104869 [2022-09-20 23:05:47,443 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1142 transitions. [2022-09-20 23:05:47,443 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1142 transitions. [2022-09-20 23:05:47,443 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 23:05:47,444 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1142 transitions. [2022-09-20 23:05:47,446 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 228.4) internal successors, (1142), 5 states have internal predecessors, (1142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:05:47,448 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 267.0) internal successors, (1602), 6 states have internal predecessors, (1602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:05:47,448 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 267.0) internal successors, (1602), 6 states have internal predecessors, (1602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:05:47,448 INFO L175 Difference]: Start difference. First operand has 268 places, 240 transitions, 634 flow. Second operand 5 states and 1142 transitions. [2022-09-20 23:05:47,448 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 267 transitions, 856 flow [2022-09-20 23:05:47,453 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 267 transitions, 808 flow, removed 9 selfloop flow, removed 9 redundant places. [2022-09-20 23:05:47,457 INFO L231 Difference]: Finished difference. Result has 258 places, 244 transitions, 636 flow [2022-09-20 23:05:47,457 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=594, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=235, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=636, PETRI_PLACES=258, PETRI_TRANSITIONS=244} [2022-09-20 23:05:47,458 INFO L287 CegarLoopForPetriNet]: 241 programPoint places, 17 predicate places. [2022-09-20 23:05:47,458 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 244 transitions, 636 flow [2022-09-20 23:05:47,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 222.6) internal successors, (1113), 5 states have internal predecessors, (1113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:05:47,459 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 23:05:47,459 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 23:05:47,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-09-20 23:05:47,459 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)] === [2022-09-20 23:05:47,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 23:05:47,460 INFO L85 PathProgramCache]: Analyzing trace with hash 433707337, now seen corresponding path program 3 times [2022-09-20 23:05:47,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 23:05:47,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064786529] [2022-09-20 23:05:47,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 23:05:47,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 23:05:47,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 23:05:48,149 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-09-20 23:05:48,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 23:05:48,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064786529] [2022-09-20 23:05:48,150 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064786529] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 23:05:48,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761115262] [2022-09-20 23:05:48,150 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-09-20 23:05:48,150 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 23:05:48,150 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 23:05:48,152 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) [2022-09-20 23:05:48,153 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-09-20 23:05:48,388 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-09-20 23:05:48,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-09-20 23:05:48,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 545 conjuncts, 35 conjunts are in the unsatisfiable core [2022-09-20 23:05:48,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 23:05:48,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-09-20 23:05:48,920 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-09-20 23:05:49,134 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-09-20 23:05:49,134 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-09-20 23:05:49,134 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [761115262] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-20 23:05:49,134 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-09-20 23:05:49,134 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [22] total 32 [2022-09-20 23:05:49,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419366037] [2022-09-20 23:05:49,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-20 23:05:49,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-09-20 23:05:49,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 23:05:49,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-09-20 23:05:49,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=917, Unknown=0, NotChecked=0, Total=992 [2022-09-20 23:05:49,139 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 184 out of 267 [2022-09-20 23:05:49,141 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 244 transitions, 636 flow. Second operand has 12 states, 12 states have (on average 189.25) internal successors, (2271), 12 states have internal predecessors, (2271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:05:49,141 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 23:05:49,141 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 184 of 267 [2022-09-20 23:05:49,141 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 23:05:49,927 INFO L130 PetriNetUnfolder]: 604/1586 cut-off events. [2022-09-20 23:05:49,928 INFO L131 PetriNetUnfolder]: For 881/884 co-relation queries the response was YES. [2022-09-20 23:05:49,935 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3469 conditions, 1586 events. 604/1586 cut-off events. For 881/884 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 8755 event pairs, 144 based on Foata normal form. 7/1521 useless extension candidates. Maximal degree in co-relation 3451. Up to 810 conditions per place. [2022-09-20 23:05:49,944 INFO L137 encePairwiseOnDemand]: 236/267 looper letters, 62 selfloop transitions, 35 changer transitions 0/270 dead transitions. [2022-09-20 23:05:49,944 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 270 transitions, 918 flow [2022-09-20 23:05:49,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-09-20 23:05:49,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-09-20 23:05:49,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 3406 transitions. [2022-09-20 23:05:49,952 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7086974615064503 [2022-09-20 23:05:49,952 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 3406 transitions. [2022-09-20 23:05:49,952 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 3406 transitions. [2022-09-20 23:05:49,954 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 23:05:49,954 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 3406 transitions. [2022-09-20 23:05:49,960 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 189.22222222222223) internal successors, (3406), 18 states have internal predecessors, (3406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:05:49,968 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 267.0) internal successors, (5073), 19 states have internal predecessors, (5073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:05:49,969 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 267.0) internal successors, (5073), 19 states have internal predecessors, (5073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:05:49,969 INFO L175 Difference]: Start difference. First operand has 258 places, 244 transitions, 636 flow. Second operand 18 states and 3406 transitions. [2022-09-20 23:05:49,969 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 270 transitions, 918 flow [2022-09-20 23:05:50,000 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 270 transitions, 910 flow, removed 2 selfloop flow, removed 1 redundant places. [2022-09-20 23:05:50,004 INFO L231 Difference]: Finished difference. Result has 278 places, 256 transitions, 790 flow [2022-09-20 23:05:50,004 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=628, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=790, PETRI_PLACES=278, PETRI_TRANSITIONS=256} [2022-09-20 23:05:50,005 INFO L287 CegarLoopForPetriNet]: 241 programPoint places, 37 predicate places. [2022-09-20 23:05:50,005 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 256 transitions, 790 flow [2022-09-20 23:05:50,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 189.25) internal successors, (2271), 12 states have internal predecessors, (2271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:05:50,006 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 23:05:50,006 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 23:05:50,037 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-09-20 23:05:50,227 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,SelfDestructingSolverStorable9 [2022-09-20 23:05:50,228 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)] === [2022-09-20 23:05:50,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 23:05:50,228 INFO L85 PathProgramCache]: Analyzing trace with hash -1245771277, now seen corresponding path program 4 times [2022-09-20 23:05:50,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 23:05:50,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495266039] [2022-09-20 23:05:50,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 23:05:50,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 23:05:50,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 23:05:50,929 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-09-20 23:05:50,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 23:05:50,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495266039] [2022-09-20 23:05:50,930 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495266039] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 23:05:50,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1286083263] [2022-09-20 23:05:50,930 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-09-20 23:05:50,931 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 23:05:50,931 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 23:05:50,932 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) [2022-09-20 23:05:50,943 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-09-20 23:05:51,116 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-09-20 23:05:51,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-09-20 23:05:51,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 506 conjuncts, 50 conjunts are in the unsatisfiable core [2022-09-20 23:05:51,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 23:05:51,130 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-09-20 23:05:51,225 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-09-20 23:05:51,226 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-09-20 23:05:52,048 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-09-20 23:05:52,562 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-09-20 23:05:52,562 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-20 23:05:53,051 INFO L356 Elim1Store]: treesize reduction 37, result has 24.5 percent of original size [2022-09-20 23:05:53,052 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 74 treesize of output 62 [2022-09-20 23:05:53,060 INFO L356 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2022-09-20 23:05:53,061 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 26 [2022-09-20 23:05:54,751 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-09-20 23:05:54,752 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1286083263] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-20 23:05:54,752 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-20 23:05:54,752 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 21] total 57 [2022-09-20 23:05:54,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233542484] [2022-09-20 23:05:54,752 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-20 23:05:54,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-09-20 23:05:54,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 23:05:54,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-09-20 23:05:54,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=243, Invalid=2949, Unknown=0, NotChecked=0, Total=3192 [2022-09-20 23:05:54,762 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 267 [2022-09-20 23:05:54,768 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 256 transitions, 790 flow. Second operand has 57 states, 57 states have (on average 155.47368421052633) internal successors, (8862), 57 states have internal predecessors, (8862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:05:54,768 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 23:05:54,768 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 267 [2022-09-20 23:05:54,768 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 23:05:58,968 INFO L130 PetriNetUnfolder]: 866/2579 cut-off events. [2022-09-20 23:05:58,968 INFO L131 PetriNetUnfolder]: For 2416/2433 co-relation queries the response was YES. [2022-09-20 23:05:58,981 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6383 conditions, 2579 events. 866/2579 cut-off events. For 2416/2433 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 16445 event pairs, 123 based on Foata normal form. 16/2499 useless extension candidates. Maximal degree in co-relation 6360. Up to 992 conditions per place. [2022-09-20 23:05:59,007 INFO L137 encePairwiseOnDemand]: 204/267 looper letters, 184 selfloop transitions, 132 changer transitions 0/451 dead transitions. [2022-09-20 23:05:59,008 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 451 transitions, 2262 flow [2022-09-20 23:05:59,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-09-20 23:05:59,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2022-09-20 23:05:59,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 8741 transitions. [2022-09-20 23:05:59,034 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.5846040663456393 [2022-09-20 23:05:59,034 INFO L72 ComplementDD]: Start complementDD. Operand 56 states and 8741 transitions. [2022-09-20 23:05:59,034 INFO L73 IsDeterministic]: Start isDeterministic. Operand 56 states and 8741 transitions. [2022-09-20 23:05:59,038 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 23:05:59,039 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 56 states and 8741 transitions. [2022-09-20 23:05:59,059 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 57 states, 56 states have (on average 156.08928571428572) internal successors, (8741), 56 states have internal predecessors, (8741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:05:59,082 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 57 states, 57 states have (on average 267.0) internal successors, (15219), 57 states have internal predecessors, (15219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:05:59,087 INFO L81 ComplementDD]: Finished complementDD. Result has 57 states, 57 states have (on average 267.0) internal successors, (15219), 57 states have internal predecessors, (15219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:05:59,087 INFO L175 Difference]: Start difference. First operand has 278 places, 256 transitions, 790 flow. Second operand 56 states and 8741 transitions. [2022-09-20 23:05:59,087 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 451 transitions, 2262 flow [2022-09-20 23:05:59,095 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 451 transitions, 2160 flow, removed 15 selfloop flow, removed 12 redundant places. [2022-09-20 23:05:59,101 INFO L231 Difference]: Finished difference. Result has 349 places, 367 transitions, 1818 flow [2022-09-20 23:05:59,102 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=742, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=56, PETRI_FLOW=1818, PETRI_PLACES=349, PETRI_TRANSITIONS=367} [2022-09-20 23:05:59,102 INFO L287 CegarLoopForPetriNet]: 241 programPoint places, 108 predicate places. [2022-09-20 23:05:59,102 INFO L495 AbstractCegarLoop]: Abstraction has has 349 places, 367 transitions, 1818 flow [2022-09-20 23:05:59,105 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 155.47368421052633) internal successors, (8862), 57 states have internal predecessors, (8862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:05:59,105 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 23:05:59,105 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 23:05:59,132 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-09-20 23:05:59,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 23:05:59,320 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)] === [2022-09-20 23:05:59,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 23:05:59,320 INFO L85 PathProgramCache]: Analyzing trace with hash 476917993, now seen corresponding path program 5 times [2022-09-20 23:05:59,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 23:05:59,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416993166] [2022-09-20 23:05:59,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 23:05:59,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 23:05:59,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 23:05:59,509 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-09-20 23:05:59,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 23:05:59,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416993166] [2022-09-20 23:05:59,510 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416993166] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 23:05:59,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198041052] [2022-09-20 23:05:59,510 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-09-20 23:05:59,510 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 23:05:59,510 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 23:05:59,511 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) [2022-09-20 23:05:59,515 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-09-20 23:05:59,749 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-09-20 23:05:59,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-09-20 23:05:59,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 558 conjuncts, 38 conjunts are in the unsatisfiable core [2022-09-20 23:05:59,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 23:05:59,763 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-09-20 23:05:59,800 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-09-20 23:05:59,800 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-09-20 23:06:00,334 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-09-20 23:06:00,346 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-09-20 23:06:00,378 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-09-20 23:06:00,378 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-20 23:06:00,431 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_371 (Array Int Int))) (< 0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_371) c_~q1~0.base) (+ (* c_~q1_front~0 4) c_~q1~0.offset)))) is different from false [2022-09-20 23:06:00,452 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-09-20 23:06:00,453 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 42 [2022-09-20 23:06:00,456 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2022-09-20 23:06:00,921 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-09-20 23:06:00,921 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1198041052] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-20 23:06:00,921 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-20 23:06:00,921 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14, 12] total 20 [2022-09-20 23:06:00,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644213639] [2022-09-20 23:06:00,925 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-20 23:06:00,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-09-20 23:06:00,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 23:06:00,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-09-20 23:06:00,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=296, Unknown=1, NotChecked=34, Total=380 [2022-09-20 23:06:00,930 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 267 [2022-09-20 23:06:00,932 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 349 places, 367 transitions, 1818 flow. Second operand has 20 states, 20 states have (on average 170.75) internal successors, (3415), 20 states have internal predecessors, (3415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:06:00,932 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 23:06:00,932 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 267 [2022-09-20 23:06:00,932 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 23:06:02,070 INFO L130 PetriNetUnfolder]: 963/2654 cut-off events. [2022-09-20 23:06:02,070 INFO L131 PetriNetUnfolder]: For 9440/9582 co-relation queries the response was YES. [2022-09-20 23:06:02,094 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9269 conditions, 2654 events. 963/2654 cut-off events. For 9440/9582 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 17034 event pairs, 233 based on Foata normal form. 45/2605 useless extension candidates. Maximal degree in co-relation 9217. Up to 748 conditions per place. [2022-09-20 23:06:02,115 INFO L137 encePairwiseOnDemand]: 229/267 looper letters, 168 selfloop transitions, 78 changer transitions 0/396 dead transitions. [2022-09-20 23:06:02,115 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 368 places, 396 transitions, 2513 flow [2022-09-20 23:06:02,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-09-20 23:06:02,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-09-20 23:06:02,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 4095 transitions. [2022-09-20 23:06:02,120 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.6390449438202247 [2022-09-20 23:06:02,120 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 4095 transitions. [2022-09-20 23:06:02,120 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 4095 transitions. [2022-09-20 23:06:02,122 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 23:06:02,122 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 4095 transitions. [2022-09-20 23:06:02,127 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 170.625) internal successors, (4095), 24 states have internal predecessors, (4095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:06:02,135 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 267.0) internal successors, (6675), 25 states have internal predecessors, (6675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:06:02,137 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 267.0) internal successors, (6675), 25 states have internal predecessors, (6675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:06:02,137 INFO L175 Difference]: Start difference. First operand has 349 places, 367 transitions, 1818 flow. Second operand 24 states and 4095 transitions. [2022-09-20 23:06:02,137 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 368 places, 396 transitions, 2513 flow [2022-09-20 23:06:02,162 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 355 places, 396 transitions, 2417 flow, removed 37 selfloop flow, removed 13 redundant places. [2022-09-20 23:06:02,169 INFO L231 Difference]: Finished difference. Result has 359 places, 356 transitions, 1865 flow [2022-09-20 23:06:02,170 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=1611, PETRI_DIFFERENCE_MINUEND_PLACES=332, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=350, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=273, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=1865, PETRI_PLACES=359, PETRI_TRANSITIONS=356} [2022-09-20 23:06:02,171 INFO L287 CegarLoopForPetriNet]: 241 programPoint places, 118 predicate places. [2022-09-20 23:06:02,171 INFO L495 AbstractCegarLoop]: Abstraction has has 359 places, 356 transitions, 1865 flow [2022-09-20 23:06:02,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 170.75) internal successors, (3415), 20 states have internal predecessors, (3415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:06:02,172 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 23:06:02,172 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 23:06:02,197 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-09-20 23:06:02,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 23:06:02,396 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)] === [2022-09-20 23:06:02,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 23:06:02,396 INFO L85 PathProgramCache]: Analyzing trace with hash 268610701, now seen corresponding path program 6 times [2022-09-20 23:06:02,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 23:06:02,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482991769] [2022-09-20 23:06:02,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 23:06:02,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 23:06:02,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 23:06:02,574 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-09-20 23:06:02,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 23:06:02,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482991769] [2022-09-20 23:06:02,574 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482991769] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-20 23:06:02,574 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-20 23:06:02,574 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-09-20 23:06:02,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605973155] [2022-09-20 23:06:02,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-20 23:06:02,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-09-20 23:06:02,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 23:06:02,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-09-20 23:06:02,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2022-09-20 23:06:02,577 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 187 out of 267 [2022-09-20 23:06:02,579 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 359 places, 356 transitions, 1865 flow. Second operand has 12 states, 12 states have (on average 192.0) internal successors, (2304), 12 states have internal predecessors, (2304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:06:02,579 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 23:06:02,579 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 187 of 267 [2022-09-20 23:06:02,579 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 23:06:03,663 INFO L130 PetriNetUnfolder]: 1167/3114 cut-off events. [2022-09-20 23:06:03,663 INFO L131 PetriNetUnfolder]: For 10222/10331 co-relation queries the response was YES. [2022-09-20 23:06:03,683 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10834 conditions, 3114 events. 1167/3114 cut-off events. For 10222/10331 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 21011 event pairs, 422 based on Foata normal form. 34/3028 useless extension candidates. Maximal degree in co-relation 10779. Up to 999 conditions per place. [2022-09-20 23:06:03,700 INFO L137 encePairwiseOnDemand]: 242/267 looper letters, 140 selfloop transitions, 57 changer transitions 0/407 dead transitions. [2022-09-20 23:06:03,701 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 407 transitions, 2664 flow [2022-09-20 23:06:03,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-09-20 23:06:03,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2022-09-20 23:06:03,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 3267 transitions. [2022-09-20 23:06:03,705 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.719762062128222 [2022-09-20 23:06:03,705 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 3267 transitions. [2022-09-20 23:06:03,705 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 3267 transitions. [2022-09-20 23:06:03,706 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 23:06:03,707 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 3267 transitions. [2022-09-20 23:06:03,711 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 192.1764705882353) internal successors, (3267), 17 states have internal predecessors, (3267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:06:03,716 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 267.0) internal successors, (4806), 18 states have internal predecessors, (4806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:06:03,717 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 267.0) internal successors, (4806), 18 states have internal predecessors, (4806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:06:03,717 INFO L175 Difference]: Start difference. First operand has 359 places, 356 transitions, 1865 flow. Second operand 17 states and 3267 transitions. [2022-09-20 23:06:03,717 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 407 transitions, 2664 flow [2022-09-20 23:06:03,740 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 357 places, 407 transitions, 2536 flow, removed 11 selfloop flow, removed 18 redundant places. [2022-09-20 23:06:03,745 INFO L231 Difference]: Finished difference. Result has 359 places, 361 transitions, 1933 flow [2022-09-20 23:06:03,746 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=1739, PETRI_DIFFERENCE_MINUEND_PLACES=341, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=356, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=299, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1933, PETRI_PLACES=359, PETRI_TRANSITIONS=361} [2022-09-20 23:06:03,747 INFO L287 CegarLoopForPetriNet]: 241 programPoint places, 118 predicate places. [2022-09-20 23:06:03,747 INFO L495 AbstractCegarLoop]: Abstraction has has 359 places, 361 transitions, 1933 flow [2022-09-20 23:06:03,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 192.0) internal successors, (2304), 12 states have internal predecessors, (2304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:06:03,748 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 23:06:03,748 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 23:06:03,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-09-20 23:06:03,748 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)] === [2022-09-20 23:06:03,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 23:06:03,750 INFO L85 PathProgramCache]: Analyzing trace with hash -1779545397, now seen corresponding path program 7 times [2022-09-20 23:06:03,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 23:06:03,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172091160] [2022-09-20 23:06:03,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 23:06:03,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 23:06:03,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 23:06:04,094 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-09-20 23:06:04,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 23:06:04,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172091160] [2022-09-20 23:06:04,095 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172091160] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-20 23:06:04,095 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-20 23:06:04,095 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-09-20 23:06:04,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753603069] [2022-09-20 23:06:04,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-20 23:06:04,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-09-20 23:06:04,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 23:06:04,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-09-20 23:06:04,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2022-09-20 23:06:04,098 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 267 [2022-09-20 23:06:04,099 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 359 places, 361 transitions, 1933 flow. Second operand has 13 states, 13 states have (on average 189.6153846153846) internal successors, (2465), 13 states have internal predecessors, (2465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:06:04,099 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 23:06:04,099 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 267 [2022-09-20 23:06:04,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 23:06:05,392 INFO L130 PetriNetUnfolder]: 1346/3416 cut-off events. [2022-09-20 23:06:05,392 INFO L131 PetriNetUnfolder]: For 12322/12493 co-relation queries the response was YES. [2022-09-20 23:06:05,416 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12350 conditions, 3416 events. 1346/3416 cut-off events. For 12322/12493 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 23348 event pairs, 310 based on Foata normal form. 43/3327 useless extension candidates. Maximal degree in co-relation 12294. Up to 1259 conditions per place. [2022-09-20 23:06:05,432 INFO L137 encePairwiseOnDemand]: 242/267 looper letters, 109 selfloop transitions, 62 changer transitions 0/381 dead transitions. [2022-09-20 23:06:05,432 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 381 transitions, 2440 flow [2022-09-20 23:06:05,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-09-20 23:06:05,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-09-20 23:06:05,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 3417 transitions. [2022-09-20 23:06:05,437 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7109862671660424 [2022-09-20 23:06:05,437 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 3417 transitions. [2022-09-20 23:06:05,437 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 3417 transitions. [2022-09-20 23:06:05,438 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 23:06:05,438 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 3417 transitions. [2022-09-20 23:06:05,443 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 189.83333333333334) internal successors, (3417), 18 states have internal predecessors, (3417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:06:05,448 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 267.0) internal successors, (5073), 19 states have internal predecessors, (5073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:06:05,448 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 267.0) internal successors, (5073), 19 states have internal predecessors, (5073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:06:05,449 INFO L175 Difference]: Start difference. First operand has 359 places, 361 transitions, 1933 flow. Second operand 18 states and 3417 transitions. [2022-09-20 23:06:05,449 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 381 transitions, 2440 flow [2022-09-20 23:06:05,477 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 362 places, 381 transitions, 2345 flow, removed 3 selfloop flow, removed 14 redundant places. [2022-09-20 23:06:05,484 INFO L231 Difference]: Finished difference. Result has 363 places, 362 transitions, 1997 flow [2022-09-20 23:06:05,485 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=1838, PETRI_DIFFERENCE_MINUEND_PLACES=345, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=361, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=299, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1997, PETRI_PLACES=363, PETRI_TRANSITIONS=362} [2022-09-20 23:06:05,486 INFO L287 CegarLoopForPetriNet]: 241 programPoint places, 122 predicate places. [2022-09-20 23:06:05,486 INFO L495 AbstractCegarLoop]: Abstraction has has 363 places, 362 transitions, 1997 flow [2022-09-20 23:06:05,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 189.6153846153846) internal successors, (2465), 13 states have internal predecessors, (2465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:06:05,486 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 23:06:05,486 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 23:06:05,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-09-20 23:06:05,487 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)] === [2022-09-20 23:06:05,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 23:06:05,488 INFO L85 PathProgramCache]: Analyzing trace with hash -981692941, now seen corresponding path program 1 times [2022-09-20 23:06:05,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 23:06:05,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972977945] [2022-09-20 23:06:05,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 23:06:05,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 23:06:05,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 23:06:05,694 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-09-20 23:06:05,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 23:06:05,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972977945] [2022-09-20 23:06:05,695 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972977945] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 23:06:05,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1514604041] [2022-09-20 23:06:05,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 23:06:05,695 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 23:06:05,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 23:06:05,700 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) [2022-09-20 23:06:05,727 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-09-20 23:06:05,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 23:06:05,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 580 conjuncts, 20 conjunts are in the unsatisfiable core [2022-09-20 23:06:05,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 23:06:06,235 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-09-20 23:06:06,235 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-20 23:06:06,734 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-09-20 23:06:06,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1514604041] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-20 23:06:06,734 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-20 23:06:06,735 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-09-20 23:06:06,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607934029] [2022-09-20 23:06:06,735 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-20 23:06:06,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-09-20 23:06:06,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 23:06:06,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-09-20 23:06:06,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=480, Unknown=0, NotChecked=0, Total=600 [2022-09-20 23:06:06,739 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 192 out of 267 [2022-09-20 23:06:06,743 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 363 places, 362 transitions, 1997 flow. Second operand has 25 states, 25 states have (on average 196.32) internal successors, (4908), 25 states have internal predecessors, (4908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:06:06,743 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 23:06:06,743 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 192 of 267 [2022-09-20 23:06:06,743 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 23:06:08,295 INFO L130 PetriNetUnfolder]: 1611/4990 cut-off events. [2022-09-20 23:06:08,295 INFO L131 PetriNetUnfolder]: For 17819/18013 co-relation queries the response was YES. [2022-09-20 23:06:08,339 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16969 conditions, 4990 events. 1611/4990 cut-off events. For 17819/18013 co-relation queries the response was YES. Maximal size of possible extension queue 195. Compared 40878 event pairs, 529 based on Foata normal form. 50/4748 useless extension candidates. Maximal degree in co-relation 16912. Up to 1423 conditions per place. [2022-09-20 23:06:08,358 INFO L137 encePairwiseOnDemand]: 247/267 looper letters, 108 selfloop transitions, 45 changer transitions 92/462 dead transitions. [2022-09-20 23:06:08,358 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 382 places, 462 transitions, 3386 flow [2022-09-20 23:06:08,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-09-20 23:06:08,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2022-09-20 23:06:08,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 3945 transitions. [2022-09-20 23:06:08,364 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7387640449438202 [2022-09-20 23:06:08,364 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 3945 transitions. [2022-09-20 23:06:08,364 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 3945 transitions. [2022-09-20 23:06:08,365 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 23:06:08,365 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 3945 transitions. [2022-09-20 23:06:08,424 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 197.25) internal successors, (3945), 20 states have internal predecessors, (3945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:06:08,430 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 267.0) internal successors, (5607), 21 states have internal predecessors, (5607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:06:08,431 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 267.0) internal successors, (5607), 21 states have internal predecessors, (5607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:06:08,431 INFO L175 Difference]: Start difference. First operand has 363 places, 362 transitions, 1997 flow. Second operand 20 states and 3945 transitions. [2022-09-20 23:06:08,431 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 382 places, 462 transitions, 3386 flow [2022-09-20 23:06:08,475 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 462 transitions, 3238 flow, removed 9 selfloop flow, removed 16 redundant places. [2022-09-20 23:06:08,481 INFO L231 Difference]: Finished difference. Result has 370 places, 364 transitions, 2019 flow [2022-09-20 23:06:08,481 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=1886, PETRI_DIFFERENCE_MINUEND_PLACES=347, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=362, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=318, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=2019, PETRI_PLACES=370, PETRI_TRANSITIONS=364} [2022-09-20 23:06:08,482 INFO L287 CegarLoopForPetriNet]: 241 programPoint places, 129 predicate places. [2022-09-20 23:06:08,482 INFO L495 AbstractCegarLoop]: Abstraction has has 370 places, 364 transitions, 2019 flow [2022-09-20 23:06:08,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 196.32) internal successors, (4908), 25 states have internal predecessors, (4908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:06:08,483 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 23:06:08,483 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 23:06:08,514 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-09-20 23:06:08,695 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,SelfDestructingSolverStorable14 [2022-09-20 23:06:08,696 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)] === [2022-09-20 23:06:08,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 23:06:08,696 INFO L85 PathProgramCache]: Analyzing trace with hash -2048132399, now seen corresponding path program 2 times [2022-09-20 23:06:08,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 23:06:08,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877725706] [2022-09-20 23:06:08,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 23:06:08,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 23:06:08,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 23:06:08,792 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-09-20 23:06:08,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 23:06:08,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877725706] [2022-09-20 23:06:08,793 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877725706] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-20 23:06:08,793 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-20 23:06:08,793 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-09-20 23:06:08,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470007886] [2022-09-20 23:06:08,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-20 23:06:08,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-09-20 23:06:08,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 23:06:08,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-09-20 23:06:08,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-09-20 23:06:08,795 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 233 out of 267 [2022-09-20 23:06:08,796 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 370 places, 364 transitions, 2019 flow. Second operand has 4 states, 4 states have (on average 237.75) internal successors, (951), 4 states have internal predecessors, (951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:06:08,796 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 23:06:08,796 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 233 of 267 [2022-09-20 23:06:08,796 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 23:06:09,869 INFO L130 PetriNetUnfolder]: 1206/3847 cut-off events. [2022-09-20 23:06:09,869 INFO L131 PetriNetUnfolder]: For 14075/14262 co-relation queries the response was YES. [2022-09-20 23:06:09,966 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12574 conditions, 3847 events. 1206/3847 cut-off events. For 14075/14262 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 29768 event pairs, 277 based on Foata normal form. 68/3599 useless extension candidates. Maximal degree in co-relation 12514. Up to 1036 conditions per place. [2022-09-20 23:06:09,986 INFO L137 encePairwiseOnDemand]: 263/267 looper letters, 56 selfloop transitions, 29 changer transitions 0/389 dead transitions. [2022-09-20 23:06:09,987 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 389 transitions, 2386 flow [2022-09-20 23:06:09,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-09-20 23:06:09,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-09-20 23:06:09,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 971 transitions. [2022-09-20 23:06:09,989 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.9091760299625468 [2022-09-20 23:06:09,989 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 971 transitions. [2022-09-20 23:06:09,989 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 971 transitions. [2022-09-20 23:06:09,989 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 23:06:09,989 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 971 transitions. [2022-09-20 23:06:09,990 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 242.75) internal successors, (971), 4 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:06:09,994 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 267.0) internal successors, (1335), 5 states have internal predecessors, (1335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:06:09,994 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 267.0) internal successors, (1335), 5 states have internal predecessors, (1335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:06:09,995 INFO L175 Difference]: Start difference. First operand has 370 places, 364 transitions, 2019 flow. Second operand 4 states and 971 transitions. [2022-09-20 23:06:09,995 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 389 transitions, 2386 flow [2022-09-20 23:06:10,021 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 357 places, 389 transitions, 2298 flow, removed 13 selfloop flow, removed 9 redundant places. [2022-09-20 23:06:10,026 INFO L231 Difference]: Finished difference. Result has 359 places, 373 transitions, 2183 flow [2022-09-20 23:06:10,027 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=1943, PETRI_DIFFERENCE_MINUEND_PLACES=354, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=364, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=337, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=2183, PETRI_PLACES=359, PETRI_TRANSITIONS=373} [2022-09-20 23:06:10,027 INFO L287 CegarLoopForPetriNet]: 241 programPoint places, 118 predicate places. [2022-09-20 23:06:10,028 INFO L495 AbstractCegarLoop]: Abstraction has has 359 places, 373 transitions, 2183 flow [2022-09-20 23:06:10,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 237.75) internal successors, (951), 4 states have internal predecessors, (951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:06:10,028 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 23:06:10,028 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 23:06:10,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-09-20 23:06:10,029 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)] === [2022-09-20 23:06:10,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 23:06:10,029 INFO L85 PathProgramCache]: Analyzing trace with hash 1614049301, now seen corresponding path program 3 times [2022-09-20 23:06:10,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 23:06:10,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111855879] [2022-09-20 23:06:10,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 23:06:10,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 23:06:10,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 23:06:11,155 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-09-20 23:06:11,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 23:06:11,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111855879] [2022-09-20 23:06:11,155 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111855879] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 23:06:11,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824855954] [2022-09-20 23:06:11,155 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-09-20 23:06:11,155 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 23:06:11,156 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 23:06:11,157 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) [2022-09-20 23:06:11,158 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-09-20 23:06:11,441 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-09-20 23:06:11,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-09-20 23:06:11,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 567 conjuncts, 24 conjunts are in the unsatisfiable core [2022-09-20 23:06:11,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 23:06:11,814 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-09-20 23:06:11,815 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 32 [2022-09-20 23:06:11,851 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-09-20 23:06:11,852 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-20 23:06:14,174 INFO L356 Elim1Store]: treesize reduction 12, result has 89.0 percent of original size [2022-09-20 23:06:14,174 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 46 treesize of output 110 [2022-09-20 23:06:14,425 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-09-20 23:06:14,425 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [824855954] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-20 23:06:14,426 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-20 23:06:14,426 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 8, 8] total 46 [2022-09-20 23:06:14,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108738652] [2022-09-20 23:06:14,426 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-20 23:06:14,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-09-20 23:06:14,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 23:06:14,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-09-20 23:06:14,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=1930, Unknown=0, NotChecked=0, Total=2070 [2022-09-20 23:06:14,434 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 148 out of 267 [2022-09-20 23:06:14,438 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 359 places, 373 transitions, 2183 flow. Second operand has 46 states, 46 states have (on average 152.41304347826087) internal successors, (7011), 46 states have internal predecessors, (7011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:06:14,439 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 23:06:14,439 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 148 of 267 [2022-09-20 23:06:14,439 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 23:06:20,301 INFO L130 PetriNetUnfolder]: 6683/13551 cut-off events. [2022-09-20 23:06:20,301 INFO L131 PetriNetUnfolder]: For 71791/73660 co-relation queries the response was YES. [2022-09-20 23:06:20,382 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52184 conditions, 13551 events. 6683/13551 cut-off events. For 71791/73660 co-relation queries the response was YES. Maximal size of possible extension queue 544. Compared 110842 event pairs, 1814 based on Foata normal form. 36/12262 useless extension candidates. Maximal degree in co-relation 52124. Up to 5748 conditions per place. [2022-09-20 23:06:20,466 INFO L137 encePairwiseOnDemand]: 219/267 looper letters, 386 selfloop transitions, 144 changer transitions 0/658 dead transitions. [2022-09-20 23:06:20,467 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 429 places, 658 transitions, 5457 flow [2022-09-20 23:06:20,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-09-20 23:06:20,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2022-09-20 23:06:20,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 10852 transitions. [2022-09-20 23:06:20,483 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.5724534472754128 [2022-09-20 23:06:20,483 INFO L72 ComplementDD]: Start complementDD. Operand 71 states and 10852 transitions. [2022-09-20 23:06:20,483 INFO L73 IsDeterministic]: Start isDeterministic. Operand 71 states and 10852 transitions. [2022-09-20 23:06:20,488 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 23:06:20,489 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 71 states and 10852 transitions. [2022-09-20 23:06:20,507 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 72 states, 71 states have (on average 152.8450704225352) internal successors, (10852), 71 states have internal predecessors, (10852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:06:20,529 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 72 states, 72 states have (on average 267.0) internal successors, (19224), 72 states have internal predecessors, (19224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:06:20,532 INFO L81 ComplementDD]: Finished complementDD. Result has 72 states, 72 states have (on average 267.0) internal successors, (19224), 72 states have internal predecessors, (19224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:06:20,532 INFO L175 Difference]: Start difference. First operand has 359 places, 373 transitions, 2183 flow. Second operand 71 states and 10852 transitions. [2022-09-20 23:06:20,532 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 429 places, 658 transitions, 5457 flow [2022-09-20 23:06:20,702 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 429 places, 658 transitions, 5365 flow, removed 46 selfloop flow, removed 0 redundant places. [2022-09-20 23:06:20,710 INFO L231 Difference]: Finished difference. Result has 445 places, 454 transitions, 3347 flow [2022-09-20 23:06:20,711 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=2151, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=373, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=275, PETRI_DIFFERENCE_SUBTRAHEND_STATES=71, PETRI_FLOW=3347, PETRI_PLACES=445, PETRI_TRANSITIONS=454} [2022-09-20 23:06:20,711 INFO L287 CegarLoopForPetriNet]: 241 programPoint places, 204 predicate places. [2022-09-20 23:06:20,711 INFO L495 AbstractCegarLoop]: Abstraction has has 445 places, 454 transitions, 3347 flow [2022-09-20 23:06:20,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 152.41304347826087) internal successors, (7011), 46 states have internal predecessors, (7011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:06:20,712 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 23:06:20,713 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 23:06:20,719 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-09-20 23:06:20,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-09-20 23:06:20,920 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)] === [2022-09-20 23:06:20,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 23:06:20,920 INFO L85 PathProgramCache]: Analyzing trace with hash 332524653, now seen corresponding path program 4 times [2022-09-20 23:06:20,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 23:06:20,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236216493] [2022-09-20 23:06:20,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 23:06:20,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 23:06:21,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 23:06:22,139 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-09-20 23:06:22,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 23:06:22,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236216493] [2022-09-20 23:06:22,140 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236216493] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 23:06:22,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [397563054] [2022-09-20 23:06:22,140 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-09-20 23:06:22,140 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 23:06:22,140 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 23:06:22,141 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) [2022-09-20 23:06:22,143 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-09-20 23:06:22,328 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-09-20 23:06:22,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-09-20 23:06:22,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 539 conjuncts, 75 conjunts are in the unsatisfiable core [2022-09-20 23:06:22,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 23:06:24,775 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-09-20 23:06:24,776 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-20 23:06:25,432 INFO L356 Elim1Store]: treesize reduction 44, result has 75.4 percent of original size [2022-09-20 23:06:25,432 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 58 treesize of output 152 [2022-09-20 23:06:27,896 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-09-20 23:06:27,897 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [397563054] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-20 23:06:27,897 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-20 23:06:27,897 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 26, 26] total 83 [2022-09-20 23:06:27,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106801542] [2022-09-20 23:06:27,897 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-20 23:06:27,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2022-09-20 23:06:27,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 23:06:27,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2022-09-20 23:06:27,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=754, Invalid=6052, Unknown=0, NotChecked=0, Total=6806 [2022-09-20 23:06:27,907 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 148 out of 267 [2022-09-20 23:06:27,914 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 445 places, 454 transitions, 3347 flow. Second operand has 83 states, 83 states have (on average 151.56626506024097) internal successors, (12580), 83 states have internal predecessors, (12580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:06:27,914 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 23:06:27,914 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 148 of 267 [2022-09-20 23:06:27,914 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 23:06:36,575 INFO L130 PetriNetUnfolder]: 8646/18228 cut-off events. [2022-09-20 23:06:36,576 INFO L131 PetriNetUnfolder]: For 99581/100495 co-relation queries the response was YES. [2022-09-20 23:06:36,803 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73418 conditions, 18228 events. 8646/18228 cut-off events. For 99581/100495 co-relation queries the response was YES. Maximal size of possible extension queue 718. Compared 163984 event pairs, 1961 based on Foata normal form. 30/17037 useless extension candidates. Maximal degree in co-relation 73342. Up to 10412 conditions per place. [2022-09-20 23:06:36,932 INFO L137 encePairwiseOnDemand]: 203/267 looper letters, 349 selfloop transitions, 298 changer transitions 0/775 dead transitions. [2022-09-20 23:06:36,932 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 530 places, 775 transitions, 7319 flow [2022-09-20 23:06:36,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-09-20 23:06:36,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2022-09-20 23:06:36,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 13106 transitions. [2022-09-20 23:06:36,946 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.5707690967685741 [2022-09-20 23:06:36,947 INFO L72 ComplementDD]: Start complementDD. Operand 86 states and 13106 transitions. [2022-09-20 23:06:36,947 INFO L73 IsDeterministic]: Start isDeterministic. Operand 86 states and 13106 transitions. [2022-09-20 23:06:36,950 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 23:06:36,950 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 86 states and 13106 transitions. [2022-09-20 23:06:36,974 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 87 states, 86 states have (on average 152.3953488372093) internal successors, (13106), 86 states have internal predecessors, (13106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:06:36,995 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 87 states, 87 states have (on average 267.0) internal successors, (23229), 87 states have internal predecessors, (23229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:06:36,999 INFO L81 ComplementDD]: Finished complementDD. Result has 87 states, 87 states have (on average 267.0) internal successors, (23229), 87 states have internal predecessors, (23229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:06:36,999 INFO L175 Difference]: Start difference. First operand has 445 places, 454 transitions, 3347 flow. Second operand 86 states and 13106 transitions. [2022-09-20 23:06:37,000 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 530 places, 775 transitions, 7319 flow [2022-09-20 23:06:37,165 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 508 places, 775 transitions, 7137 flow, removed 50 selfloop flow, removed 22 redundant places. [2022-09-20 23:06:37,173 INFO L231 Difference]: Finished difference. Result has 524 places, 661 transitions, 6250 flow [2022-09-20 23:06:37,173 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=3200, PETRI_DIFFERENCE_MINUEND_PLACES=423, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=454, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=134, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=86, PETRI_FLOW=6250, PETRI_PLACES=524, PETRI_TRANSITIONS=661} [2022-09-20 23:06:37,174 INFO L287 CegarLoopForPetriNet]: 241 programPoint places, 283 predicate places. [2022-09-20 23:06:37,174 INFO L495 AbstractCegarLoop]: Abstraction has has 524 places, 661 transitions, 6250 flow [2022-09-20 23:06:37,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 151.56626506024097) internal successors, (12580), 83 states have internal predecessors, (12580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:06:37,175 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 23:06:37,176 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 23:06:37,193 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-09-20 23:06:37,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 23:06:37,377 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)] === [2022-09-20 23:06:37,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 23:06:37,377 INFO L85 PathProgramCache]: Analyzing trace with hash -1272166971, now seen corresponding path program 5 times [2022-09-20 23:06:37,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 23:06:37,378 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524211798] [2022-09-20 23:06:37,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 23:06:37,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 23:06:37,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 23:06:38,078 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-09-20 23:06:38,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 23:06:38,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524211798] [2022-09-20 23:06:38,078 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524211798] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 23:06:38,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1618583485] [2022-09-20 23:06:38,078 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-09-20 23:06:38,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 23:06:38,079 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 23:06:38,080 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) [2022-09-20 23:06:38,080 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-09-20 23:06:38,272 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-09-20 23:06:38,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-09-20 23:06:38,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 593 conjuncts, 57 conjunts are in the unsatisfiable core [2022-09-20 23:06:38,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 23:06:39,249 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-09-20 23:06:39,250 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-20 23:06:39,579 INFO L356 Elim1Store]: treesize reduction 12, result has 89.0 percent of original size [2022-09-20 23:06:39,580 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 46 treesize of output 110 [2022-09-20 23:06:40,198 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-09-20 23:06:40,199 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1618583485] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-20 23:06:40,199 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-20 23:06:40,199 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 17, 16] total 49 [2022-09-20 23:06:40,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488080906] [2022-09-20 23:06:40,199 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-20 23:06:40,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-09-20 23:06:40,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 23:06:40,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-09-20 23:06:40,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=2072, Unknown=0, NotChecked=0, Total=2352 [2022-09-20 23:06:40,213 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 267 [2022-09-20 23:06:40,216 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 524 places, 661 transitions, 6250 flow. Second operand has 49 states, 49 states have (on average 155.48979591836735) internal successors, (7619), 49 states have internal predecessors, (7619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:06:40,216 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 23:06:40,216 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 267 [2022-09-20 23:06:40,216 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 23:06:49,877 INFO L130 PetriNetUnfolder]: 10772/23241 cut-off events. [2022-09-20 23:06:49,878 INFO L131 PetriNetUnfolder]: For 255087/257880 co-relation queries the response was YES. [2022-09-20 23:06:50,489 INFO L83 FinitePrefix]: Finished finitePrefix Result has 118716 conditions, 23241 events. 10772/23241 cut-off events. For 255087/257880 co-relation queries the response was YES. Maximal size of possible extension queue 905. Compared 220278 event pairs, 2105 based on Foata normal form. 149/21876 useless extension candidates. Maximal degree in co-relation 118623. Up to 13915 conditions per place. [2022-09-20 23:06:50,653 INFO L137 encePairwiseOnDemand]: 213/267 looper letters, 543 selfloop transitions, 510 changer transitions 5/1190 dead transitions. [2022-09-20 23:06:50,653 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 588 places, 1190 transitions, 13837 flow [2022-09-20 23:06:50,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-09-20 23:06:50,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2022-09-20 23:06:50,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 10208 transitions. [2022-09-20 23:06:50,664 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.5881878421204264 [2022-09-20 23:06:50,665 INFO L72 ComplementDD]: Start complementDD. Operand 65 states and 10208 transitions. [2022-09-20 23:06:50,665 INFO L73 IsDeterministic]: Start isDeterministic. Operand 65 states and 10208 transitions. [2022-09-20 23:06:50,668 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 23:06:50,668 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 65 states and 10208 transitions. [2022-09-20 23:06:50,680 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 66 states, 65 states have (on average 157.04615384615386) internal successors, (10208), 65 states have internal predecessors, (10208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:06:50,697 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 66 states, 66 states have (on average 267.0) internal successors, (17622), 66 states have internal predecessors, (17622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:06:50,700 INFO L81 ComplementDD]: Finished complementDD. Result has 66 states, 66 states have (on average 267.0) internal successors, (17622), 66 states have internal predecessors, (17622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:06:50,700 INFO L175 Difference]: Start difference. First operand has 524 places, 661 transitions, 6250 flow. Second operand 65 states and 10208 transitions. [2022-09-20 23:06:50,700 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 588 places, 1190 transitions, 13837 flow [2022-09-20 23:06:51,543 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 529 places, 1190 transitions, 13161 flow, removed 261 selfloop flow, removed 59 redundant places. [2022-09-20 23:06:51,558 INFO L231 Difference]: Finished difference. Result has 564 places, 1089 transitions, 12324 flow [2022-09-20 23:06:51,559 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=5791, PETRI_DIFFERENCE_MINUEND_PLACES=465, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=661, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=156, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=401, PETRI_DIFFERENCE_SUBTRAHEND_STATES=65, PETRI_FLOW=12324, PETRI_PLACES=564, PETRI_TRANSITIONS=1089} [2022-09-20 23:06:51,559 INFO L287 CegarLoopForPetriNet]: 241 programPoint places, 323 predicate places. [2022-09-20 23:06:51,560 INFO L495 AbstractCegarLoop]: Abstraction has has 564 places, 1089 transitions, 12324 flow [2022-09-20 23:06:51,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 155.48979591836735) internal successors, (7619), 49 states have internal predecessors, (7619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:06:51,561 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 23:06:51,561 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 23:06:51,579 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-09-20 23:06:51,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 23:06:51,762 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-09-20 23:06:51,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 23:06:51,762 INFO L85 PathProgramCache]: Analyzing trace with hash -1467499475, now seen corresponding path program 6 times [2022-09-20 23:06:51,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 23:06:51,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276435290] [2022-09-20 23:06:51,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 23:06:51,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 23:06:51,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 23:06:53,093 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-09-20 23:06:53,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 23:06:53,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276435290] [2022-09-20 23:06:53,094 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276435290] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 23:06:53,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1961862503] [2022-09-20 23:06:53,094 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-09-20 23:06:53,094 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 23:06:53,094 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 23:06:53,095 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) [2022-09-20 23:06:53,096 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-09-20 23:06:53,279 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-09-20 23:06:53,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-09-20 23:06:53,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 593 conjuncts, 75 conjunts are in the unsatisfiable core [2022-09-20 23:06:53,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 23:06:54,547 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-09-20 23:06:54,548 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-20 23:06:55,026 INFO L356 Elim1Store]: treesize reduction 12, result has 89.0 percent of original size [2022-09-20 23:06:55,027 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 46 treesize of output 110 [2022-09-20 23:06:55,946 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-09-20 23:06:55,946 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1961862503] provided 1 perfect and 1 imperfect interpolant sequences [2022-09-20 23:06:55,946 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-09-20 23:06:55,946 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [39, 24] total 67 [2022-09-20 23:06:55,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718874486] [2022-09-20 23:06:55,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-20 23:06:55,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-09-20 23:06:55,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 23:06:55,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-09-20 23:06:55,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=318, Invalid=4104, Unknown=0, NotChecked=0, Total=4422 [2022-09-20 23:06:55,949 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 200 out of 267 [2022-09-20 23:06:55,950 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 564 places, 1089 transitions, 12324 flow. Second operand has 10 states, 10 states have (on average 205.2) internal successors, (2052), 10 states have internal predecessors, (2052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:06:55,950 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 23:06:55,950 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 200 of 267 [2022-09-20 23:06:55,950 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 23:07:08,216 INFO L130 PetriNetUnfolder]: 13075/28747 cut-off events. [2022-09-20 23:07:08,216 INFO L131 PetriNetUnfolder]: For 375942/382330 co-relation queries the response was YES. [2022-09-20 23:07:09,159 INFO L83 FinitePrefix]: Finished finitePrefix Result has 163318 conditions, 28747 events. 13075/28747 cut-off events. For 375942/382330 co-relation queries the response was YES. Maximal size of possible extension queue 1071. Compared 286138 event pairs, 1871 based on Foata normal form. 378/27534 useless extension candidates. Maximal degree in co-relation 163190. Up to 11594 conditions per place. [2022-09-20 23:07:09,354 INFO L137 encePairwiseOnDemand]: 249/267 looper letters, 778 selfloop transitions, 208 changer transitions 197/1470 dead transitions. [2022-09-20 23:07:09,354 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 576 places, 1470 transitions, 20172 flow [2022-09-20 23:07:09,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-09-20 23:07:09,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-09-20 23:07:09,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2711 transitions. [2022-09-20 23:07:09,357 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7810429271103428 [2022-09-20 23:07:09,357 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2711 transitions. [2022-09-20 23:07:09,357 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2711 transitions. [2022-09-20 23:07:09,358 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 23:07:09,358 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2711 transitions. [2022-09-20 23:07:09,360 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 208.53846153846155) internal successors, (2711), 13 states have internal predecessors, (2711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:07:09,363 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 267.0) internal successors, (3738), 14 states have internal predecessors, (3738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:07:09,363 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 267.0) internal successors, (3738), 14 states have internal predecessors, (3738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:07:09,363 INFO L175 Difference]: Start difference. First operand has 564 places, 1089 transitions, 12324 flow. Second operand 13 states and 2711 transitions. [2022-09-20 23:07:09,363 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 576 places, 1470 transitions, 20172 flow [2022-09-20 23:07:12,901 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 566 places, 1470 transitions, 18095 flow, removed 1019 selfloop flow, removed 10 redundant places. [2022-09-20 23:07:12,918 INFO L231 Difference]: Finished difference. Result has 573 places, 1120 transitions, 12847 flow [2022-09-20 23:07:12,919 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=11175, PETRI_DIFFERENCE_MINUEND_PLACES=554, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1087, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=134, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=879, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=12847, PETRI_PLACES=573, PETRI_TRANSITIONS=1120} [2022-09-20 23:07:12,919 INFO L287 CegarLoopForPetriNet]: 241 programPoint places, 332 predicate places. [2022-09-20 23:07:12,919 INFO L495 AbstractCegarLoop]: Abstraction has has 573 places, 1120 transitions, 12847 flow [2022-09-20 23:07:12,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 205.2) internal successors, (2052), 10 states have internal predecessors, (2052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:07:12,920 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 23:07:12,920 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 23:07:12,938 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-09-20 23:07:13,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 23:07:13,123 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-09-20 23:07:13,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 23:07:13,124 INFO L85 PathProgramCache]: Analyzing trace with hash 1761774213, now seen corresponding path program 7 times [2022-09-20 23:07:13,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 23:07:13,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198603515] [2022-09-20 23:07:13,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 23:07:13,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 23:07:13,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 23:07:13,753 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-09-20 23:07:13,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 23:07:13,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198603515] [2022-09-20 23:07:13,754 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198603515] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 23:07:13,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510441825] [2022-09-20 23:07:13,754 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-09-20 23:07:13,754 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 23:07:13,754 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 23:07:13,755 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) [2022-09-20 23:07:13,759 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-09-20 23:07:13,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 23:07:13,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 593 conjuncts, 86 conjunts are in the unsatisfiable core [2022-09-20 23:07:13,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 23:07:16,895 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-09-20 23:07:16,896 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-20 23:07:17,617 INFO L356 Elim1Store]: treesize reduction 46, result has 74.9 percent of original size [2022-09-20 23:07:17,617 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 59 treesize of output 154 [2022-09-20 23:07:19,025 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-09-20 23:07:19,026 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [510441825] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-20 23:07:19,026 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-20 23:07:19,026 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 30, 18] total 65 [2022-09-20 23:07:19,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651520392] [2022-09-20 23:07:19,026 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-20 23:07:19,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-09-20 23:07:19,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 23:07:19,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-09-20 23:07:19,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=355, Invalid=3804, Unknown=1, NotChecked=0, Total=4160 [2022-09-20 23:07:19,031 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 267 [2022-09-20 23:07:19,034 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 573 places, 1120 transitions, 12847 flow. Second operand has 65 states, 65 states have (on average 120.52307692307693) internal successors, (7834), 65 states have internal predecessors, (7834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:07:19,034 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 23:07:19,034 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 267 [2022-09-20 23:07:19,034 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 23:07:45,561 INFO L130 PetriNetUnfolder]: 18443/40345 cut-off events. [2022-09-20 23:07:45,561 INFO L131 PetriNetUnfolder]: For 547843/557686 co-relation queries the response was YES. [2022-09-20 23:07:47,240 INFO L83 FinitePrefix]: Finished finitePrefix Result has 236189 conditions, 40345 events. 18443/40345 cut-off events. For 547843/557686 co-relation queries the response was YES. Maximal size of possible extension queue 1596. Compared 425924 event pairs, 2019 based on Foata normal form. 1026/39184 useless extension candidates. Maximal degree in co-relation 236055. Up to 19627 conditions per place. [2022-09-20 23:07:47,556 INFO L137 encePairwiseOnDemand]: 204/267 looper letters, 1287 selfloop transitions, 1408 changer transitions 2/2802 dead transitions. [2022-09-20 23:07:47,557 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 701 places, 2802 transitions, 39157 flow [2022-09-20 23:07:47,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 137 states. [2022-09-20 23:07:47,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2022-09-20 23:07:47,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 16576 transitions. [2022-09-20 23:07:47,571 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.4531561825090899 [2022-09-20 23:07:47,572 INFO L72 ComplementDD]: Start complementDD. Operand 137 states and 16576 transitions. [2022-09-20 23:07:47,572 INFO L73 IsDeterministic]: Start isDeterministic. Operand 137 states and 16576 transitions. [2022-09-20 23:07:47,575 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 23:07:47,575 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 137 states and 16576 transitions. [2022-09-20 23:07:47,589 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 138 states, 137 states have (on average 120.99270072992701) internal successors, (16576), 137 states have internal predecessors, (16576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:07:47,619 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 138 states, 138 states have (on average 267.0) internal successors, (36846), 138 states have internal predecessors, (36846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:07:47,627 INFO L81 ComplementDD]: Finished complementDD. Result has 138 states, 138 states have (on average 267.0) internal successors, (36846), 138 states have internal predecessors, (36846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:07:47,627 INFO L175 Difference]: Start difference. First operand has 573 places, 1120 transitions, 12847 flow. Second operand 137 states and 16576 transitions. [2022-09-20 23:07:47,627 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 701 places, 2802 transitions, 39157 flow [2022-09-20 23:07:52,774 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 693 places, 2802 transitions, 38419 flow, removed 333 selfloop flow, removed 8 redundant places. [2022-09-20 23:07:52,835 INFO L231 Difference]: Finished difference. Result has 736 places, 2283 transitions, 33368 flow [2022-09-20 23:07:52,836 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=12616, PETRI_DIFFERENCE_MINUEND_PLACES=557, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=449, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=521, PETRI_DIFFERENCE_SUBTRAHEND_STATES=137, PETRI_FLOW=33368, PETRI_PLACES=736, PETRI_TRANSITIONS=2283} [2022-09-20 23:07:52,836 INFO L287 CegarLoopForPetriNet]: 241 programPoint places, 495 predicate places. [2022-09-20 23:07:52,836 INFO L495 AbstractCegarLoop]: Abstraction has has 736 places, 2283 transitions, 33368 flow [2022-09-20 23:07:52,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 120.52307692307693) internal successors, (7834), 65 states have internal predecessors, (7834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:07:52,837 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 23:07:52,838 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 23:07:52,856 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-09-20 23:07:53,038 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,SelfDestructingSolverStorable20 [2022-09-20 23:07:53,039 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-09-20 23:07:53,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 23:07:53,039 INFO L85 PathProgramCache]: Analyzing trace with hash 1465857685, now seen corresponding path program 8 times [2022-09-20 23:07:53,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 23:07:53,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67864372] [2022-09-20 23:07:53,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 23:07:53,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 23:07:53,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 23:07:53,265 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-09-20 23:07:53,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 23:07:53,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67864372] [2022-09-20 23:07:53,265 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67864372] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 23:07:53,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1339037247] [2022-09-20 23:07:53,265 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-09-20 23:07:53,265 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 23:07:53,265 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 23:07:53,268 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) [2022-09-20 23:07:53,273 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-09-20 23:07:53,496 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-09-20 23:07:53,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-09-20 23:07:53,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 593 conjuncts, 77 conjunts are in the unsatisfiable core [2022-09-20 23:07:53,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 23:07:55,853 INFO L356 Elim1Store]: treesize reduction 69, result has 38.4 percent of original size [2022-09-20 23:07:55,854 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 57 treesize of output 57 [2022-09-20 23:07:55,880 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-09-20 23:07:55,880 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-20 23:07:56,351 INFO L356 Elim1Store]: treesize reduction 44, result has 75.4 percent of original size [2022-09-20 23:07:56,352 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 58 treesize of output 152 [2022-09-20 23:07:57,789 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-09-20 23:07:57,789 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1339037247] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-20 23:07:57,789 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-20 23:07:57,790 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 26, 26] total 55 [2022-09-20 23:07:57,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974225444] [2022-09-20 23:07:57,790 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-20 23:07:57,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-09-20 23:07:57,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 23:07:57,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-09-20 23:07:57,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=494, Invalid=2475, Unknown=1, NotChecked=0, Total=2970 [2022-09-20 23:07:57,797 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 166 out of 267 [2022-09-20 23:07:57,801 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 736 places, 2283 transitions, 33368 flow. Second operand has 55 states, 55 states have (on average 170.3090909090909) internal successors, (9367), 55 states have internal predecessors, (9367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:07:57,801 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 23:07:57,802 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 166 of 267 [2022-09-20 23:07:57,803 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 23:08:30,308 INFO L130 PetriNetUnfolder]: 20952/45241 cut-off events. [2022-09-20 23:08:30,308 INFO L131 PetriNetUnfolder]: For 1121664/1145410 co-relation queries the response was YES. [2022-09-20 23:08:32,529 INFO L83 FinitePrefix]: Finished finitePrefix Result has 321939 conditions, 45241 events. 20952/45241 cut-off events. For 1121664/1145410 co-relation queries the response was YES. Maximal size of possible extension queue 1711. Compared 480485 event pairs, 2203 based on Foata normal form. 1200/44091 useless extension candidates. Maximal degree in co-relation 321765. Up to 25280 conditions per place. [2022-09-20 23:08:32,940 INFO L137 encePairwiseOnDemand]: 220/267 looper letters, 2000 selfloop transitions, 881 changer transitions 9/3061 dead transitions. [2022-09-20 23:08:32,940 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 795 places, 3061 transitions, 50291 flow [2022-09-20 23:08:32,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-09-20 23:08:32,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2022-09-20 23:08:32,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 10478 transitions. [2022-09-20 23:08:32,947 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.6433351752931786 [2022-09-20 23:08:32,947 INFO L72 ComplementDD]: Start complementDD. Operand 61 states and 10478 transitions. [2022-09-20 23:08:32,947 INFO L73 IsDeterministic]: Start isDeterministic. Operand 61 states and 10478 transitions. [2022-09-20 23:08:32,949 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 23:08:32,949 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 61 states and 10478 transitions. [2022-09-20 23:08:32,957 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 62 states, 61 states have (on average 171.7704918032787) internal successors, (10478), 61 states have internal predecessors, (10478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:08:32,968 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 62 states, 62 states have (on average 267.0) internal successors, (16554), 62 states have internal predecessors, (16554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:08:32,970 INFO L81 ComplementDD]: Finished complementDD. Result has 62 states, 62 states have (on average 267.0) internal successors, (16554), 62 states have internal predecessors, (16554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:08:32,971 INFO L175 Difference]: Start difference. First operand has 736 places, 2283 transitions, 33368 flow. Second operand 61 states and 10478 transitions. [2022-09-20 23:08:32,971 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 795 places, 3061 transitions, 50291 flow [2022-09-20 23:08:55,004 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 730 places, 3061 transitions, 47460 flow, removed 1290 selfloop flow, removed 65 redundant places. [2022-09-20 23:08:55,050 INFO L231 Difference]: Finished difference. Result has 747 places, 2740 transitions, 41777 flow [2022-09-20 23:08:55,052 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=31012, PETRI_DIFFERENCE_MINUEND_PLACES=670, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2280, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=476, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1529, PETRI_DIFFERENCE_SUBTRAHEND_STATES=61, PETRI_FLOW=41777, PETRI_PLACES=747, PETRI_TRANSITIONS=2740} [2022-09-20 23:08:55,052 INFO L287 CegarLoopForPetriNet]: 241 programPoint places, 506 predicate places. [2022-09-20 23:08:55,052 INFO L495 AbstractCegarLoop]: Abstraction has has 747 places, 2740 transitions, 41777 flow [2022-09-20 23:08:55,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 170.3090909090909) internal successors, (9367), 55 states have internal predecessors, (9367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:08:55,053 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 23:08:55,053 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 23:08:55,071 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-09-20 23:08:55,254 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,SelfDestructingSolverStorable21 [2022-09-20 23:08:55,254 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-09-20 23:08:55,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 23:08:55,255 INFO L85 PathProgramCache]: Analyzing trace with hash 789501013, now seen corresponding path program 9 times [2022-09-20 23:08:55,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 23:08:55,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847743510] [2022-09-20 23:08:55,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 23:08:55,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 23:08:55,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 23:08:55,742 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-09-20 23:08:55,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 23:08:55,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847743510] [2022-09-20 23:08:55,743 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847743510] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 23:08:55,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445885767] [2022-09-20 23:08:55,743 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-09-20 23:08:55,743 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 23:08:55,743 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 23:08:55,744 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) [2022-09-20 23:08:55,748 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-09-20 23:08:55,941 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-09-20 23:08:55,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-09-20 23:08:55,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 567 conjuncts, 45 conjunts are in the unsatisfiable core [2022-09-20 23:08:55,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 23:08:56,586 INFO L356 Elim1Store]: treesize reduction 3, result has 85.0 percent of original size [2022-09-20 23:08:56,586 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 29 [2022-09-20 23:08:56,698 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-09-20 23:08:56,699 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-20 23:08:57,070 INFO L356 Elim1Store]: treesize reduction 20, result has 81.7 percent of original size [2022-09-20 23:08:57,071 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 59 treesize of output 107 [2022-09-20 23:08:57,382 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-09-20 23:08:57,382 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1445885767] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-20 23:08:57,382 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-20 23:08:57,383 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 14, 10] total 42 [2022-09-20 23:08:57,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137213360] [2022-09-20 23:08:57,383 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-20 23:08:57,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-09-20 23:08:57,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 23:08:57,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-09-20 23:08:57,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=1598, Unknown=0, NotChecked=0, Total=1722 [2022-09-20 23:08:57,388 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 267 [2022-09-20 23:08:57,390 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 747 places, 2740 transitions, 41777 flow. Second operand has 42 states, 42 states have (on average 119.97619047619048) internal successors, (5039), 42 states have internal predecessors, (5039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:08:57,390 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 23:08:57,390 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 267 [2022-09-20 23:08:57,390 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand