/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/parallel-parallel-sum-1.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.repeated-lipton-a802222-m [2022-12-12 15:37:36,235 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-12 15:37:36,236 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-12 15:37:36,272 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-12 15:37:36,273 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-12 15:37:36,275 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-12 15:37:36,277 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-12 15:37:36,281 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-12 15:37:36,284 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-12 15:37:36,287 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-12 15:37:36,288 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-12 15:37:36,289 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-12 15:37:36,289 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-12 15:37:36,289 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-12 15:37:36,290 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-12 15:37:36,290 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-12 15:37:36,291 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-12 15:37:36,291 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-12 15:37:36,292 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-12 15:37:36,293 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-12 15:37:36,294 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-12 15:37:36,298 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-12 15:37:36,299 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-12 15:37:36,300 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-12 15:37:36,309 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-12 15:37:36,309 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-12 15:37:36,310 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-12 15:37:36,311 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-12 15:37:36,311 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-12 15:37:36,312 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-12 15:37:36,312 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-12 15:37:36,313 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-12 15:37:36,315 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-12 15:37:36,315 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-12 15:37:36,316 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-12 15:37:36,316 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-12 15:37:36,316 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-12 15:37:36,317 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-12 15:37:36,317 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-12 15:37:36,318 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-12 15:37:36,318 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-12 15:37:36,319 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe.epf [2022-12-12 15:37:36,349 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-12 15:37:36,350 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-12 15:37:36,351 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-12 15:37:36,351 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-12 15:37:36,352 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-12 15:37:36,352 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-12 15:37:36,352 INFO L138 SettingsManager]: * Use SBE=true [2022-12-12 15:37:36,352 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-12 15:37:36,352 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-12 15:37:36,353 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-12 15:37:36,353 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-12 15:37:36,353 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-12 15:37:36,353 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-12 15:37:36,353 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-12 15:37:36,353 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-12 15:37:36,354 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-12 15:37:36,354 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-12 15:37:36,354 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-12 15:37:36,354 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-12 15:37:36,354 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-12 15:37:36,354 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-12 15:37:36,354 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-12-12 15:37:36,354 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-12 15:37:36,354 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-12 15:37:36,355 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-12 15:37:36,355 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-12 15:37:36,355 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-12 15:37:36,355 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-12 15:37:36,355 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-12 15:37:36,355 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-12 15:37:36,355 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-12-12 15:37:36,623 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-12 15:37:36,637 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-12 15:37:36,638 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-12 15:37:36,639 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-12 15:37:36,639 INFO L275 PluginConnector]: CDTParser initialized [2022-12-12 15:37:36,640 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/parallel-parallel-sum-1.wvr.c [2022-12-12 15:37:37,607 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-12 15:37:37,824 INFO L351 CDTParser]: Found 1 translation units. [2022-12-12 15:37:37,824 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-parallel-sum-1.wvr.c [2022-12-12 15:37:37,829 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/14bf28aef/5e5ea8ca4b5a4103b74ccb3fd3e8ad35/FLAG999cf22d9 [2022-12-12 15:37:37,845 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/14bf28aef/5e5ea8ca4b5a4103b74ccb3fd3e8ad35 [2022-12-12 15:37:37,868 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-12 15:37:37,870 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-12-12 15:37:37,872 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-12 15:37:37,872 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-12 15:37:37,874 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-12 15:37:37,874 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.12 03:37:37" (1/1) ... [2022-12-12 15:37:37,875 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@69746889 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 03:37:37, skipping insertion in model container [2022-12-12 15:37:37,875 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.12 03:37:37" (1/1) ... [2022-12-12 15:37:37,880 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-12 15:37:37,914 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-12 15:37:38,041 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-12 15:37:38,045 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-12 15:37:38,045 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-12 15:37:38,046 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-12 15:37:38,049 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-12 15:37:38,050 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-12 15:37:38,050 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-12 15:37:38,051 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-12 15:37:38,052 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-12 15:37:38,052 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-12 15:37:38,053 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-12 15:37:38,053 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-12 15:37:38,057 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-12 15:37:38,059 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-12 15:37:38,059 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-12 15:37:38,059 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-12 15:37:38,074 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-parallel-sum-1.wvr.c[3642,3655] [2022-12-12 15:37:38,086 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-12 15:37:38,093 INFO L203 MainTranslator]: Completed pre-run [2022-12-12 15:37:38,105 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-12 15:37:38,106 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-12 15:37:38,107 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-12 15:37:38,107 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-12 15:37:38,108 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-12 15:37:38,109 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-12 15:37:38,109 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-12 15:37:38,109 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-12 15:37:38,111 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-12 15:37:38,112 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-12 15:37:38,112 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-12 15:37:38,113 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-12 15:37:38,118 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-12 15:37:38,119 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-12 15:37:38,119 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-12 15:37:38,120 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-12 15:37:38,136 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-parallel-sum-1.wvr.c[3642,3655] [2022-12-12 15:37:38,138 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-12 15:37:38,156 INFO L208 MainTranslator]: Completed translation [2022-12-12 15:37:38,156 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 03:37:38 WrapperNode [2022-12-12 15:37:38,156 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-12 15:37:38,158 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-12 15:37:38,158 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-12 15:37:38,158 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-12 15:37:38,162 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 03:37:38" (1/1) ... [2022-12-12 15:37:38,178 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 03:37:38" (1/1) ... [2022-12-12 15:37:38,209 INFO L138 Inliner]: procedures = 27, calls = 68, calls flagged for inlining = 18, calls inlined = 24, statements flattened = 297 [2022-12-12 15:37:38,209 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-12 15:37:38,210 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-12 15:37:38,210 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-12 15:37:38,210 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-12 15:37:38,217 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 03:37:38" (1/1) ... [2022-12-12 15:37:38,217 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 03:37:38" (1/1) ... [2022-12-12 15:37:38,231 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 03:37:38" (1/1) ... [2022-12-12 15:37:38,232 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 03:37:38" (1/1) ... [2022-12-12 15:37:38,238 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 03:37:38" (1/1) ... [2022-12-12 15:37:38,240 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 03:37:38" (1/1) ... [2022-12-12 15:37:38,242 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 03:37:38" (1/1) ... [2022-12-12 15:37:38,243 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 03:37:38" (1/1) ... [2022-12-12 15:37:38,245 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-12 15:37:38,246 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-12 15:37:38,246 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-12 15:37:38,246 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-12 15:37:38,246 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 03:37:38" (1/1) ... [2022-12-12 15:37:38,267 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-12 15:37:38,275 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 15:37:38,312 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-12 15:37:38,314 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-12 15:37:38,351 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-12 15:37:38,351 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-12 15:37:38,351 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-12 15:37:38,351 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-12 15:37:38,351 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-12-12 15:37:38,351 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-12-12 15:37:38,351 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-12-12 15:37:38,351 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-12-12 15:37:38,357 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-12-12 15:37:38,357 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-12-12 15:37:38,357 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2022-12-12 15:37:38,357 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2022-12-12 15:37:38,357 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-12 15:37:38,357 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-12-12 15:37:38,357 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-12-12 15:37:38,357 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-12 15:37:38,357 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-12 15:37:38,357 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-12 15:37:38,357 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-12 15:37:38,359 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2022-12-12 15:37:38,499 INFO L236 CfgBuilder]: Building ICFG [2022-12-12 15:37:38,500 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-12 15:37:38,815 INFO L277 CfgBuilder]: Performing block encoding [2022-12-12 15:37:38,909 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-12 15:37:38,910 INFO L302 CfgBuilder]: Removed 5 assume(true) statements. [2022-12-12 15:37:38,911 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.12 03:37:38 BoogieIcfgContainer [2022-12-12 15:37:38,911 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-12 15:37:38,913 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-12 15:37:38,913 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-12 15:37:38,966 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-12 15:37:38,966 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.12 03:37:37" (1/3) ... [2022-12-12 15:37:38,966 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d7efef3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.12 03:37:38, skipping insertion in model container [2022-12-12 15:37:38,966 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 03:37:38" (2/3) ... [2022-12-12 15:37:38,967 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d7efef3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.12 03:37:38, skipping insertion in model container [2022-12-12 15:37:38,967 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.12 03:37:38" (3/3) ... [2022-12-12 15:37:38,975 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-parallel-sum-1.wvr.c [2022-12-12 15:37:38,989 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-12 15:37:38,989 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-12 15:37:38,989 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-12 15:37:39,056 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-12-12 15:37:39,092 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 190 places, 192 transitions, 416 flow [2022-12-12 15:37:39,168 INFO L130 PetriNetUnfolder]: 15/188 cut-off events. [2022-12-12 15:37:39,168 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-12-12 15:37:39,174 INFO L83 FinitePrefix]: Finished finitePrefix Result has 205 conditions, 188 events. 15/188 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 118 event pairs, 0 based on Foata normal form. 0/172 useless extension candidates. Maximal degree in co-relation 150. Up to 2 conditions per place. [2022-12-12 15:37:39,174 INFO L82 GeneralOperation]: Start removeDead. Operand has 190 places, 192 transitions, 416 flow [2022-12-12 15:37:39,180 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 174 places, 176 transitions, 376 flow [2022-12-12 15:37:39,181 INFO L203 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-12 15:37:39,196 INFO L174 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 174 places, 176 transitions, 376 flow [2022-12-12 15:37:39,202 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 174 places, 176 transitions, 376 flow [2022-12-12 15:37:39,242 INFO L130 PetriNetUnfolder]: 15/176 cut-off events. [2022-12-12 15:37:39,242 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-12-12 15:37:39,244 INFO L83 FinitePrefix]: Finished finitePrefix Result has 193 conditions, 176 events. 15/176 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 117 event pairs, 0 based on Foata normal form. 0/161 useless extension candidates. Maximal degree in co-relation 150. Up to 2 conditions per place. [2022-12-12 15:37:39,247 INFO L222 LiptonReduction]: Starting Lipton reduction on Petri net that has 174 places, 176 transitions, 376 flow [2022-12-12 15:37:39,247 INFO L226 LiptonReduction]: Number of co-enabled transitions 2160 [2022-12-12 15:37:46,506 INFO L241 LiptonReduction]: Total number of compositions: 145 [2022-12-12 15:37:46,521 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-12 15:37:46,526 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;@458bfdec, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, Conditionality=CONDITIONAL_DISJUNCTIVE, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-12 15:37:46,526 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-12-12 15:37:46,530 INFO L130 PetriNetUnfolder]: 5/30 cut-off events. [2022-12-12 15:37:46,530 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-12-12 15:37:46,530 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 15:37:46,530 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 15:37:46,531 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 2 more)] === [2022-12-12 15:37:46,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 15:37:46,535 INFO L85 PathProgramCache]: Analyzing trace with hash 557514244, now seen corresponding path program 1 times [2022-12-12 15:37:46,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 15:37:46,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439029927] [2022-12-12 15:37:46,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 15:37:46,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 15:37:46,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 15:37:47,020 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 15:37:47,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 15:37:47,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439029927] [2022-12-12 15:37:47,021 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439029927] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 15:37:47,021 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-12 15:37:47,021 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-12 15:37:47,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413054725] [2022-12-12 15:37:47,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 15:37:47,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-12 15:37:47,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 15:37:47,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-12 15:37:47,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-12 15:37:47,042 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 31 [2022-12-12 15:37:47,043 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 31 transitions, 86 flow. Second operand has 3 states, 2 states have (on average 11.0) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 15:37:47,043 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 15:37:47,043 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 31 [2022-12-12 15:37:47,043 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 15:37:47,308 INFO L130 PetriNetUnfolder]: 1952/2593 cut-off events. [2022-12-12 15:37:47,309 INFO L131 PetriNetUnfolder]: For 157/157 co-relation queries the response was YES. [2022-12-12 15:37:47,314 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5430 conditions, 2593 events. 1952/2593 cut-off events. For 157/157 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 9168 event pairs, 624 based on Foata normal form. 1/1889 useless extension candidates. Maximal degree in co-relation 4200. Up to 1650 conditions per place. [2022-12-12 15:37:47,324 INFO L137 encePairwiseOnDemand]: 25/31 looper letters, 51 selfloop transitions, 5 changer transitions 1/57 dead transitions. [2022-12-12 15:37:47,324 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 57 transitions, 273 flow [2022-12-12 15:37:47,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-12 15:37:47,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-12 15:37:47,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 58 transitions. [2022-12-12 15:37:47,335 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.6236559139784946 [2022-12-12 15:37:47,340 INFO L175 Difference]: Start difference. First operand has 39 places, 31 transitions, 86 flow. Second operand 3 states and 58 transitions. [2022-12-12 15:37:47,341 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 57 transitions, 273 flow [2022-12-12 15:37:47,346 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 57 transitions, 243 flow, removed 0 selfloop flow, removed 8 redundant places. [2022-12-12 15:37:47,347 INFO L231 Difference]: Finished difference. Result has 34 places, 35 transitions, 103 flow [2022-12-12 15:37:47,349 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=103, PETRI_PLACES=34, PETRI_TRANSITIONS=35} [2022-12-12 15:37:47,351 INFO L295 CegarLoopForPetriNet]: 39 programPoint places, -5 predicate places. [2022-12-12 15:37:47,352 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 35 transitions, 103 flow [2022-12-12 15:37:47,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 11.0) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 15:37:47,352 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 15:37:47,352 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 15:37:47,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-12 15:37:47,352 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 2 more)] === [2022-12-12 15:37:47,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 15:37:47,353 INFO L85 PathProgramCache]: Analyzing trace with hash 670638725, now seen corresponding path program 1 times [2022-12-12 15:37:47,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 15:37:47,353 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736580715] [2022-12-12 15:37:47,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 15:37:47,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 15:37:47,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 15:37:47,582 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 15:37:47,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 15:37:47,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736580715] [2022-12-12 15:37:47,583 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736580715] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 15:37:47,583 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-12 15:37:47,583 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-12 15:37:47,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637817876] [2022-12-12 15:37:47,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 15:37:47,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-12 15:37:47,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 15:37:47,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-12 15:37:47,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-12 15:37:47,585 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 31 [2022-12-12 15:37:47,586 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 35 transitions, 103 flow. Second operand has 4 states, 3 states have (on average 8.0) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 15:37:47,586 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 15:37:47,586 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 31 [2022-12-12 15:37:47,586 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 15:37:47,993 INFO L130 PetriNetUnfolder]: 4054/5355 cut-off events. [2022-12-12 15:37:47,993 INFO L131 PetriNetUnfolder]: For 949/949 co-relation queries the response was YES. [2022-12-12 15:37:47,998 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12916 conditions, 5355 events. 4054/5355 cut-off events. For 949/949 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 21790 event pairs, 810 based on Foata normal form. 1/3928 useless extension candidates. Maximal degree in co-relation 2468. Up to 2128 conditions per place. [2022-12-12 15:37:48,015 INFO L137 encePairwiseOnDemand]: 25/31 looper letters, 83 selfloop transitions, 8 changer transitions 1/92 dead transitions. [2022-12-12 15:37:48,015 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 92 transitions, 455 flow [2022-12-12 15:37:48,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-12 15:37:48,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-12 15:37:48,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 81 transitions. [2022-12-12 15:37:48,017 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.6532258064516129 [2022-12-12 15:37:48,017 INFO L175 Difference]: Start difference. First operand has 34 places, 35 transitions, 103 flow. Second operand 4 states and 81 transitions. [2022-12-12 15:37:48,017 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 92 transitions, 455 flow [2022-12-12 15:37:48,018 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 92 transitions, 442 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-12 15:37:48,019 INFO L231 Difference]: Finished difference. Result has 39 places, 42 transitions, 158 flow [2022-12-12 15:37:48,019 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=158, PETRI_PLACES=39, PETRI_TRANSITIONS=42} [2022-12-12 15:37:48,020 INFO L295 CegarLoopForPetriNet]: 39 programPoint places, 0 predicate places. [2022-12-12 15:37:48,020 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 42 transitions, 158 flow [2022-12-12 15:37:48,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 8.0) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 15:37:48,020 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 15:37:48,020 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 15:37:48,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-12 15:37:48,021 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 2 more)] === [2022-12-12 15:37:48,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 15:37:48,021 INFO L85 PathProgramCache]: Analyzing trace with hash 1224213684, now seen corresponding path program 1 times [2022-12-12 15:37:48,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 15:37:48,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824298406] [2022-12-12 15:37:48,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 15:37:48,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 15:37:48,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 15:37:48,170 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 15:37:48,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 15:37:48,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824298406] [2022-12-12 15:37:48,170 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824298406] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 15:37:48,170 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-12 15:37:48,170 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-12 15:37:48,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789411334] [2022-12-12 15:37:48,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 15:37:48,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-12 15:37:48,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 15:37:48,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-12 15:37:48,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-12 15:37:48,171 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 31 [2022-12-12 15:37:48,171 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 42 transitions, 158 flow. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 15:37:48,172 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 15:37:48,172 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 31 [2022-12-12 15:37:48,172 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 15:37:48,648 INFO L130 PetriNetUnfolder]: 4795/6436 cut-off events. [2022-12-12 15:37:48,648 INFO L131 PetriNetUnfolder]: For 4634/4634 co-relation queries the response was YES. [2022-12-12 15:37:48,653 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17256 conditions, 6436 events. 4795/6436 cut-off events. For 4634/4634 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 26662 event pairs, 2813 based on Foata normal form. 248/6684 useless extension candidates. Maximal degree in co-relation 8677. Up to 5356 conditions per place. [2022-12-12 15:37:48,674 INFO L137 encePairwiseOnDemand]: 26/31 looper letters, 41 selfloop transitions, 2 changer transitions 28/71 dead transitions. [2022-12-12 15:37:48,674 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 71 transitions, 392 flow [2022-12-12 15:37:48,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-12 15:37:48,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-12 15:37:48,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 58 transitions. [2022-12-12 15:37:48,675 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.46774193548387094 [2022-12-12 15:37:48,675 INFO L175 Difference]: Start difference. First operand has 39 places, 42 transitions, 158 flow. Second operand 4 states and 58 transitions. [2022-12-12 15:37:48,675 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 71 transitions, 392 flow [2022-12-12 15:37:48,683 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 71 transitions, 392 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-12 15:37:48,684 INFO L231 Difference]: Finished difference. Result has 44 places, 43 transitions, 178 flow [2022-12-12 15:37:48,684 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=178, PETRI_PLACES=44, PETRI_TRANSITIONS=43} [2022-12-12 15:37:48,685 INFO L295 CegarLoopForPetriNet]: 39 programPoint places, 5 predicate places. [2022-12-12 15:37:48,685 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 43 transitions, 178 flow [2022-12-12 15:37:48,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 15:37:48,685 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 15:37:48,685 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 15:37:48,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-12 15:37:48,685 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 2 more)] === [2022-12-12 15:37:48,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 15:37:48,686 INFO L85 PathProgramCache]: Analyzing trace with hash -463887657, now seen corresponding path program 1 times [2022-12-12 15:37:48,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 15:37:48,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167107161] [2022-12-12 15:37:48,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 15:37:48,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 15:37:48,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 15:37:48,846 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 15:37:48,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 15:37:48,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167107161] [2022-12-12 15:37:48,846 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167107161] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 15:37:48,847 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-12 15:37:48,847 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-12 15:37:48,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909724109] [2022-12-12 15:37:48,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 15:37:48,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-12 15:37:48,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 15:37:48,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-12 15:37:48,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-12 15:37:48,849 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 31 [2022-12-12 15:37:48,849 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 43 transitions, 178 flow. Second operand has 4 states, 3 states have (on average 8.333333333333334) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 15:37:48,849 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 15:37:48,849 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 31 [2022-12-12 15:37:48,849 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 15:37:49,431 INFO L130 PetriNetUnfolder]: 5996/7910 cut-off events. [2022-12-12 15:37:49,431 INFO L131 PetriNetUnfolder]: For 4169/4169 co-relation queries the response was YES. [2022-12-12 15:37:49,440 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21695 conditions, 7910 events. 5996/7910 cut-off events. For 4169/4169 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 33729 event pairs, 1001 based on Foata normal form. 1/7911 useless extension candidates. Maximal degree in co-relation 21679. Up to 4734 conditions per place. [2022-12-12 15:37:49,466 INFO L137 encePairwiseOnDemand]: 25/31 looper letters, 86 selfloop transitions, 13 changer transitions 5/104 dead transitions. [2022-12-12 15:37:49,466 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 104 transitions, 594 flow [2022-12-12 15:37:49,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-12 15:37:49,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-12 15:37:49,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 81 transitions. [2022-12-12 15:37:49,467 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.6532258064516129 [2022-12-12 15:37:49,467 INFO L175 Difference]: Start difference. First operand has 44 places, 43 transitions, 178 flow. Second operand 4 states and 81 transitions. [2022-12-12 15:37:49,467 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 104 transitions, 594 flow [2022-12-12 15:37:49,478 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 104 transitions, 578 flow, removed 7 selfloop flow, removed 2 redundant places. [2022-12-12 15:37:49,479 INFO L231 Difference]: Finished difference. Result has 47 places, 54 transitions, 294 flow [2022-12-12 15:37:49,480 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=294, PETRI_PLACES=47, PETRI_TRANSITIONS=54} [2022-12-12 15:37:49,480 INFO L295 CegarLoopForPetriNet]: 39 programPoint places, 8 predicate places. [2022-12-12 15:37:49,480 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 54 transitions, 294 flow [2022-12-12 15:37:49,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 8.333333333333334) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 15:37:49,480 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 15:37:49,481 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 15:37:49,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-12 15:37:49,481 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 2 more)] === [2022-12-12 15:37:49,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 15:37:49,481 INFO L85 PathProgramCache]: Analyzing trace with hash -1871942016, now seen corresponding path program 1 times [2022-12-12 15:37:49,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 15:37:49,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451625531] [2022-12-12 15:37:49,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 15:37:49,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 15:37:49,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 15:37:49,671 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 15:37:49,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 15:37:49,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451625531] [2022-12-12 15:37:49,672 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451625531] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 15:37:49,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1592053845] [2022-12-12 15:37:49,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 15:37:49,672 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 15:37:49,672 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 15:37:49,675 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 15:37:49,733 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-12 15:37:49,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 15:37:49,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-12 15:37:49,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 15:37:49,990 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 15:37:49,990 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 15:37:50,108 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 15:37:50,108 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1592053845] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 15:37:50,108 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 15:37:50,108 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2022-12-12 15:37:50,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907407692] [2022-12-12 15:37:50,108 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 15:37:50,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-12 15:37:50,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 15:37:50,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-12 15:37:50,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2022-12-12 15:37:50,109 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 31 [2022-12-12 15:37:50,110 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 54 transitions, 294 flow. Second operand has 13 states, 13 states have (on average 6.230769230769231) internal successors, (81), 12 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 15:37:50,110 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 15:37:50,110 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 31 [2022-12-12 15:37:50,110 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 15:37:50,799 INFO L130 PetriNetUnfolder]: 6113/8118 cut-off events. [2022-12-12 15:37:50,800 INFO L131 PetriNetUnfolder]: For 10687/10687 co-relation queries the response was YES. [2022-12-12 15:37:50,811 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24248 conditions, 8118 events. 6113/8118 cut-off events. For 10687/10687 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 34239 event pairs, 3432 based on Foata normal form. 132/8250 useless extension candidates. Maximal degree in co-relation 23784. Up to 7907 conditions per place. [2022-12-12 15:37:50,834 INFO L137 encePairwiseOnDemand]: 23/31 looper letters, 49 selfloop transitions, 6 changer transitions 20/75 dead transitions. [2022-12-12 15:37:50,834 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 75 transitions, 508 flow [2022-12-12 15:37:50,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-12 15:37:50,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-12 15:37:50,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 57 transitions. [2022-12-12 15:37:50,835 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.3064516129032258 [2022-12-12 15:37:50,835 INFO L175 Difference]: Start difference. First operand has 47 places, 54 transitions, 294 flow. Second operand 6 states and 57 transitions. [2022-12-12 15:37:50,835 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 75 transitions, 508 flow [2022-12-12 15:37:50,843 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 75 transitions, 504 flow, removed 2 selfloop flow, removed 0 redundant places. [2022-12-12 15:37:50,844 INFO L231 Difference]: Finished difference. Result has 54 places, 55 transitions, 320 flow [2022-12-12 15:37:50,845 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=290, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=320, PETRI_PLACES=54, PETRI_TRANSITIONS=55} [2022-12-12 15:37:50,845 INFO L295 CegarLoopForPetriNet]: 39 programPoint places, 15 predicate places. [2022-12-12 15:37:50,845 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 55 transitions, 320 flow [2022-12-12 15:37:50,845 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.230769230769231) internal successors, (81), 12 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 15:37:50,845 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 15:37:50,845 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 15:37:50,852 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-12 15:37:51,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 15:37:51,051 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 2 more)] === [2022-12-12 15:37:51,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 15:37:51,052 INFO L85 PathProgramCache]: Analyzing trace with hash 913864541, now seen corresponding path program 1 times [2022-12-12 15:37:51,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 15:37:51,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385795977] [2022-12-12 15:37:51,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 15:37:51,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 15:37:51,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 15:37:51,667 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 15:37:51,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 15:37:51,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385795977] [2022-12-12 15:37:51,668 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385795977] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 15:37:51,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1163134417] [2022-12-12 15:37:51,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 15:37:51,668 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 15:37:51,668 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 15:37:51,669 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 15:37:51,698 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-12 15:37:51,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 15:37:51,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 44 conjunts are in the unsatisfiable core [2022-12-12 15:37:51,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 15:37:51,893 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 15:37:51,893 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2022-12-12 15:37:52,023 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 15:37:52,023 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 15:37:52,257 INFO L321 Elim1Store]: treesize reduction 8, result has 33.3 percent of original size [2022-12-12 15:37:52,257 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 12 [2022-12-12 15:37:52,269 INFO L321 Elim1Store]: treesize reduction 8, result has 33.3 percent of original size [2022-12-12 15:37:52,269 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 12 [2022-12-12 15:37:52,306 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 15:37:52,307 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1163134417] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 15:37:52,307 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 15:37:52,307 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 15 [2022-12-12 15:37:52,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715459967] [2022-12-12 15:37:52,307 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 15:37:52,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-12 15:37:52,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 15:37:52,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-12 15:37:52,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2022-12-12 15:37:52,310 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 31 [2022-12-12 15:37:52,310 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 55 transitions, 320 flow. Second operand has 16 states, 15 states have (on average 3.933333333333333) internal successors, (59), 16 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 15:37:52,310 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 15:37:52,310 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 31 [2022-12-12 15:37:52,310 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 15:37:53,552 INFO L130 PetriNetUnfolder]: 7502/9887 cut-off events. [2022-12-12 15:37:53,552 INFO L131 PetriNetUnfolder]: For 10545/10545 co-relation queries the response was YES. [2022-12-12 15:37:53,564 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29646 conditions, 9887 events. 7502/9887 cut-off events. For 10545/10545 co-relation queries the response was YES. Maximal size of possible extension queue 394. Compared 43180 event pairs, 743 based on Foata normal form. 1/9888 useless extension candidates. Maximal degree in co-relation 29608. Up to 7709 conditions per place. [2022-12-12 15:37:53,585 INFO L137 encePairwiseOnDemand]: 18/31 looper letters, 113 selfloop transitions, 61 changer transitions 8/182 dead transitions. [2022-12-12 15:37:53,585 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 182 transitions, 1238 flow [2022-12-12 15:37:53,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-12 15:37:53,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-12-12 15:37:53,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 132 transitions. [2022-12-12 15:37:53,588 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.4258064516129032 [2022-12-12 15:37:53,588 INFO L175 Difference]: Start difference. First operand has 54 places, 55 transitions, 320 flow. Second operand 10 states and 132 transitions. [2022-12-12 15:37:53,588 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 182 transitions, 1238 flow [2022-12-12 15:37:53,603 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 182 transitions, 1219 flow, removed 6 selfloop flow, removed 3 redundant places. [2022-12-12 15:37:53,606 INFO L231 Difference]: Finished difference. Result has 64 places, 114 transitions, 904 flow [2022-12-12 15:37:53,606 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=301, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=904, PETRI_PLACES=64, PETRI_TRANSITIONS=114} [2022-12-12 15:37:53,608 INFO L295 CegarLoopForPetriNet]: 39 programPoint places, 25 predicate places. [2022-12-12 15:37:53,608 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 114 transitions, 904 flow [2022-12-12 15:37:53,608 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 3.933333333333333) internal successors, (59), 16 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 15:37:53,608 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 15:37:53,609 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 15:37:53,615 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-12 15:37:53,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-12-12 15:37:53,816 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 2 more)] === [2022-12-12 15:37:53,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 15:37:53,816 INFO L85 PathProgramCache]: Analyzing trace with hash -1668146011, now seen corresponding path program 2 times [2022-12-12 15:37:53,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 15:37:53,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911146078] [2022-12-12 15:37:53,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 15:37:53,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 15:37:53,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 15:37:54,298 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 15:37:54,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 15:37:54,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911146078] [2022-12-12 15:37:54,298 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911146078] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 15:37:54,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2047763072] [2022-12-12 15:37:54,299 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-12 15:37:54,299 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 15:37:54,299 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 15:37:54,300 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 15:37:54,302 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-12 15:37:54,423 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-12 15:37:54,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 15:37:54,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 46 conjunts are in the unsatisfiable core [2022-12-12 15:37:54,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 15:37:54,540 INFO L321 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-12-12 15:37:54,540 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2022-12-12 15:37:54,651 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 15:37:54,651 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 15:37:54,792 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-12 15:37:54,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2047763072] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 15:37:54,793 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 15:37:54,793 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 5] total 16 [2022-12-12 15:37:54,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825132961] [2022-12-12 15:37:54,793 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 15:37:54,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-12 15:37:54,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 15:37:54,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-12 15:37:54,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2022-12-12 15:37:54,794 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 31 [2022-12-12 15:37:54,794 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 114 transitions, 904 flow. Second operand has 17 states, 16 states have (on average 4.9375) internal successors, (79), 17 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 15:37:54,794 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 15:37:54,794 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 31 [2022-12-12 15:37:54,794 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 15:37:56,892 INFO L130 PetriNetUnfolder]: 12655/16666 cut-off events. [2022-12-12 15:37:56,892 INFO L131 PetriNetUnfolder]: For 27426/27426 co-relation queries the response was YES. [2022-12-12 15:37:56,924 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59364 conditions, 16666 events. 12655/16666 cut-off events. For 27426/27426 co-relation queries the response was YES. Maximal size of possible extension queue 588. Compared 77920 event pairs, 578 based on Foata normal form. 4/16670 useless extension candidates. Maximal degree in co-relation 59323. Up to 10567 conditions per place. [2022-12-12 15:37:56,971 INFO L137 encePairwiseOnDemand]: 17/31 looper letters, 267 selfloop transitions, 244 changer transitions 32/543 dead transitions. [2022-12-12 15:37:56,972 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 543 transitions, 4122 flow [2022-12-12 15:37:56,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-12-12 15:37:56,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2022-12-12 15:37:56,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 383 transitions. [2022-12-12 15:37:56,974 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.45758661887694146 [2022-12-12 15:37:56,974 INFO L175 Difference]: Start difference. First operand has 64 places, 114 transitions, 904 flow. Second operand 27 states and 383 transitions. [2022-12-12 15:37:56,974 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 543 transitions, 4122 flow [2022-12-12 15:37:57,074 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 543 transitions, 4036 flow, removed 13 selfloop flow, removed 3 redundant places. [2022-12-12 15:37:57,079 INFO L231 Difference]: Finished difference. Result has 93 places, 331 transitions, 3188 flow [2022-12-12 15:37:57,079 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=859, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=3188, PETRI_PLACES=93, PETRI_TRANSITIONS=331} [2022-12-12 15:37:57,079 INFO L295 CegarLoopForPetriNet]: 39 programPoint places, 54 predicate places. [2022-12-12 15:37:57,079 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 331 transitions, 3188 flow [2022-12-12 15:37:57,080 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 4.9375) internal successors, (79), 17 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 15:37:57,080 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 15:37:57,080 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 15:37:57,086 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-12 15:37:57,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 15:37:57,285 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 2 more)] === [2022-12-12 15:37:57,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 15:37:57,285 INFO L85 PathProgramCache]: Analyzing trace with hash -1680317943, now seen corresponding path program 1 times [2022-12-12 15:37:57,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 15:37:57,286 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686529957] [2022-12-12 15:37:57,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 15:37:57,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 15:37:57,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 15:37:57,700 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 15:37:57,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 15:37:57,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686529957] [2022-12-12 15:37:57,701 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686529957] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 15:37:57,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701623242] [2022-12-12 15:37:57,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 15:37:57,701 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 15:37:57,701 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 15:37:57,702 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 15:37:57,704 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-12 15:37:57,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 15:37:57,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 57 conjunts are in the unsatisfiable core [2022-12-12 15:37:57,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 15:37:57,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-12 15:37:57,984 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-12-12 15:37:58,053 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 15:37:58,053 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2022-12-12 15:37:58,166 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 15:37:58,167 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 15:37:58,321 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 26 [2022-12-12 15:37:58,435 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 15:37:58,436 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [701623242] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 15:37:58,436 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 15:37:58,436 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 25 [2022-12-12 15:37:58,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909250031] [2022-12-12 15:37:58,436 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 15:37:58,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-12-12 15:37:58,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 15:37:58,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-12-12 15:37:58,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=578, Unknown=3, NotChecked=0, Total=702 [2022-12-12 15:37:58,437 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 31 [2022-12-12 15:37:58,437 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 331 transitions, 3188 flow. Second operand has 27 states, 26 states have (on average 3.1923076923076925) internal successors, (83), 26 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 15:37:58,437 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 15:37:58,437 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 31 [2022-12-12 15:37:58,438 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 15:38:00,870 INFO L130 PetriNetUnfolder]: 14168/18668 cut-off events. [2022-12-12 15:38:00,871 INFO L131 PetriNetUnfolder]: For 45766/45766 co-relation queries the response was YES. [2022-12-12 15:38:00,917 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78257 conditions, 18668 events. 14168/18668 cut-off events. For 45766/45766 co-relation queries the response was YES. Maximal size of possible extension queue 646. Compared 88570 event pairs, 1338 based on Foata normal form. 1/18669 useless extension candidates. Maximal degree in co-relation 78210. Up to 15593 conditions per place. [2022-12-12 15:38:00,969 INFO L137 encePairwiseOnDemand]: 18/31 looper letters, 330 selfloop transitions, 212 changer transitions 13/555 dead transitions. [2022-12-12 15:38:00,969 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 555 transitions, 5674 flow [2022-12-12 15:38:00,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-12-12 15:38:00,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2022-12-12 15:38:00,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 229 transitions. [2022-12-12 15:38:00,970 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.38879456706281834 [2022-12-12 15:38:00,975 INFO L175 Difference]: Start difference. First operand has 93 places, 331 transitions, 3188 flow. Second operand 19 states and 229 transitions. [2022-12-12 15:38:00,975 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 555 transitions, 5674 flow [2022-12-12 15:38:01,342 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 555 transitions, 5225 flow, removed 224 selfloop flow, removed 1 redundant places. [2022-12-12 15:38:01,348 INFO L231 Difference]: Finished difference. Result has 119 places, 434 transitions, 4416 flow [2022-12-12 15:38:01,349 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2795, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=331, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=4416, PETRI_PLACES=119, PETRI_TRANSITIONS=434} [2022-12-12 15:38:01,349 INFO L295 CegarLoopForPetriNet]: 39 programPoint places, 80 predicate places. [2022-12-12 15:38:01,349 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 434 transitions, 4416 flow [2022-12-12 15:38:01,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 3.1923076923076925) internal successors, (83), 26 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 15:38:01,349 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 15:38:01,350 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 15:38:01,354 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-12 15:38:01,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 15:38:01,555 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 2 more)] === [2022-12-12 15:38:01,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 15:38:01,555 INFO L85 PathProgramCache]: Analyzing trace with hash 1887357357, now seen corresponding path program 3 times [2022-12-12 15:38:01,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 15:38:01,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005188860] [2022-12-12 15:38:01,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 15:38:01,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 15:38:01,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 15:38:02,552 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 15:38:02,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 15:38:02,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005188860] [2022-12-12 15:38:02,553 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005188860] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 15:38:02,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225784874] [2022-12-12 15:38:02,553 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-12 15:38:02,553 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 15:38:02,553 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 15:38:02,554 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 15:38:02,583 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-12 15:38:02,698 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-12 15:38:02,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 15:38:02,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 52 conjunts are in the unsatisfiable core [2022-12-12 15:38:02,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 15:38:02,886 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-12 15:38:02,887 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 15:38:02,887 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 12 [2022-12-12 15:38:02,950 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 15:38:02,951 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 15:38:03,122 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-12 15:38:03,122 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [225784874] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 15:38:03,122 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 15:38:03,122 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 5] total 23 [2022-12-12 15:38:03,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393425647] [2022-12-12 15:38:03,123 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 15:38:03,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-12-12 15:38:03,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 15:38:03,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-12-12 15:38:03,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2022-12-12 15:38:03,124 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 31 [2022-12-12 15:38:03,125 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 434 transitions, 4416 flow. Second operand has 24 states, 23 states have (on average 3.608695652173913) internal successors, (83), 24 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 15:38:03,125 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 15:38:03,125 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 31 [2022-12-12 15:38:03,125 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 15:38:12,853 INFO L130 PetriNetUnfolder]: 40465/53307 cut-off events. [2022-12-12 15:38:12,854 INFO L131 PetriNetUnfolder]: For 151465/151465 co-relation queries the response was YES. [2022-12-12 15:38:13,200 INFO L83 FinitePrefix]: Finished finitePrefix Result has 224595 conditions, 53307 events. 40465/53307 cut-off events. For 151465/151465 co-relation queries the response was YES. Maximal size of possible extension queue 1863. Compared 290046 event pairs, 2228 based on Foata normal form. 8/53315 useless extension candidates. Maximal degree in co-relation 219763. Up to 22041 conditions per place. [2022-12-12 15:38:13,359 INFO L137 encePairwiseOnDemand]: 16/31 looper letters, 1116 selfloop transitions, 791 changer transitions 88/1995 dead transitions. [2022-12-12 15:38:13,359 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 1995 transitions, 19832 flow [2022-12-12 15:38:13,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-12-12 15:38:13,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2022-12-12 15:38:13,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 1000 transitions. [2022-12-12 15:38:13,363 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.4608294930875576 [2022-12-12 15:38:13,363 INFO L175 Difference]: Start difference. First operand has 119 places, 434 transitions, 4416 flow. Second operand 70 states and 1000 transitions. [2022-12-12 15:38:13,363 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 1995 transitions, 19832 flow [2022-12-12 15:38:14,678 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 1995 transitions, 19515 flow, removed 156 selfloop flow, removed 3 redundant places. [2022-12-12 15:38:14,703 INFO L231 Difference]: Finished difference. Result has 216 places, 1184 transitions, 15171 flow [2022-12-12 15:38:14,705 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=4263, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=434, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=173, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=70, PETRI_FLOW=15171, PETRI_PLACES=216, PETRI_TRANSITIONS=1184} [2022-12-12 15:38:14,706 INFO L295 CegarLoopForPetriNet]: 39 programPoint places, 177 predicate places. [2022-12-12 15:38:14,706 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 1184 transitions, 15171 flow [2022-12-12 15:38:14,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 3.608695652173913) internal successors, (83), 24 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 15:38:14,706 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 15:38:14,710 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 15:38:14,717 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-12-12 15:38:14,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 15:38:14,915 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 2 more)] === [2022-12-12 15:38:14,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 15:38:14,916 INFO L85 PathProgramCache]: Analyzing trace with hash 1452875923, now seen corresponding path program 4 times [2022-12-12 15:38:14,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 15:38:14,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239267064] [2022-12-12 15:38:14,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 15:38:14,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 15:38:14,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 15:38:15,498 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 15:38:15,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 15:38:15,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239267064] [2022-12-12 15:38:15,499 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239267064] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 15:38:15,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467052235] [2022-12-12 15:38:15,499 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-12 15:38:15,499 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 15:38:15,499 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 15:38:15,503 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 15:38:15,510 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-12 15:38:15,608 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-12 15:38:15,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 15:38:15,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 51 conjunts are in the unsatisfiable core [2022-12-12 15:38:15,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 15:38:15,766 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 15:38:15,766 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2022-12-12 15:38:15,813 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 15:38:15,813 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 15:38:15,979 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 15:38:15,980 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1467052235] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 15:38:15,980 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 15:38:15,980 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 6] total 21 [2022-12-12 15:38:15,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222511854] [2022-12-12 15:38:15,980 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 15:38:15,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-12-12 15:38:15,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 15:38:15,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-12-12 15:38:15,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2022-12-12 15:38:15,983 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 31 [2022-12-12 15:38:15,983 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 1184 transitions, 15171 flow. Second operand has 22 states, 21 states have (on average 3.9523809523809526) internal successors, (83), 22 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 15:38:15,983 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 15:38:15,984 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 31 [2022-12-12 15:38:15,984 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 15:38:26,681 INFO L130 PetriNetUnfolder]: 38149/51062 cut-off events. [2022-12-12 15:38:26,682 INFO L131 PetriNetUnfolder]: For 245008/245008 co-relation queries the response was YES. [2022-12-12 15:38:27,332 INFO L83 FinitePrefix]: Finished finitePrefix Result has 237540 conditions, 51062 events. 38149/51062 cut-off events. For 245008/245008 co-relation queries the response was YES. Maximal size of possible extension queue 1793. Compared 288153 event pairs, 4179 based on Foata normal form. 2501/53563 useless extension candidates. Maximal degree in co-relation 237365. Up to 25011 conditions per place. [2022-12-12 15:38:27,489 INFO L137 encePairwiseOnDemand]: 16/31 looper letters, 1018 selfloop transitions, 643 changer transitions 109/1770 dead transitions. [2022-12-12 15:38:27,489 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 1770 transitions, 22041 flow [2022-12-12 15:38:27,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-12-12 15:38:27,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-12-12 15:38:27,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 607 transitions. [2022-12-12 15:38:27,492 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.4351254480286738 [2022-12-12 15:38:27,492 INFO L175 Difference]: Start difference. First operand has 216 places, 1184 transitions, 15171 flow. Second operand 45 states and 607 transitions. [2022-12-12 15:38:27,492 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 1770 transitions, 22041 flow [2022-12-12 15:38:33,099 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 1770 transitions, 20456 flow, removed 754 selfloop flow, removed 12 redundant places. [2022-12-12 15:38:33,117 INFO L231 Difference]: Finished difference. Result has 262 places, 1286 transitions, 17466 flow [2022-12-12 15:38:33,117 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=10642, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=940, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=339, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=519, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=17466, PETRI_PLACES=262, PETRI_TRANSITIONS=1286} [2022-12-12 15:38:33,118 INFO L295 CegarLoopForPetriNet]: 39 programPoint places, 223 predicate places. [2022-12-12 15:38:33,118 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 1286 transitions, 17466 flow [2022-12-12 15:38:33,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 3.9523809523809526) internal successors, (83), 22 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 15:38:33,118 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 15:38:33,118 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 15:38:33,123 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-12 15:38:33,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 15:38:33,323 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 2 more)] === [2022-12-12 15:38:33,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 15:38:33,323 INFO L85 PathProgramCache]: Analyzing trace with hash 1743015365, now seen corresponding path program 2 times [2022-12-12 15:38:33,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 15:38:33,323 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874276827] [2022-12-12 15:38:33,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 15:38:33,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 15:38:33,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 15:38:33,781 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 15:38:33,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 15:38:33,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874276827] [2022-12-12 15:38:33,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874276827] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 15:38:33,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799552546] [2022-12-12 15:38:33,782 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-12 15:38:33,782 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 15:38:33,782 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 15:38:33,796 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 15:38:33,798 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-12 15:38:33,925 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-12 15:38:33,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 15:38:33,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 51 conjunts are in the unsatisfiable core [2022-12-12 15:38:33,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 15:38:34,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-12 15:38:34,070 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2022-12-12 15:38:34,102 INFO L321 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-12-12 15:38:34,103 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 12 [2022-12-12 15:38:34,177 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 15:38:34,178 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 15:38:34,309 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 27 [2022-12-12 15:38:34,372 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 15:38:34,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1799552546] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 15:38:34,373 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 15:38:34,373 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 21 [2022-12-12 15:38:34,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908514096] [2022-12-12 15:38:34,373 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 15:38:34,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-12-12 15:38:34,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 15:38:34,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-12-12 15:38:34,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=405, Unknown=1, NotChecked=0, Total=506 [2022-12-12 15:38:34,374 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 31 [2022-12-12 15:38:34,374 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 1286 transitions, 17466 flow. Second operand has 23 states, 22 states have (on average 3.6818181818181817) internal successors, (81), 22 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 15:38:34,374 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 15:38:34,374 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 31 [2022-12-12 15:38:34,374 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 15:38:50,299 INFO L130 PetriNetUnfolder]: 54814/73196 cut-off events. [2022-12-12 15:38:50,299 INFO L131 PetriNetUnfolder]: For 432257/432257 co-relation queries the response was YES. [2022-12-12 15:38:51,679 INFO L83 FinitePrefix]: Finished finitePrefix Result has 367224 conditions, 73196 events. 54814/73196 cut-off events. For 432257/432257 co-relation queries the response was YES. Maximal size of possible extension queue 2507. Compared 429053 event pairs, 4662 based on Foata normal form. 8/73204 useless extension candidates. Maximal degree in co-relation 365338. Up to 51485 conditions per place. [2022-12-12 15:38:51,957 INFO L137 encePairwiseOnDemand]: 18/31 looper letters, 1156 selfloop transitions, 1006 changer transitions 43/2205 dead transitions. [2022-12-12 15:38:51,957 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 2205 transitions, 32324 flow [2022-12-12 15:38:51,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-12-12 15:38:51,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2022-12-12 15:38:51,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 501 transitions. [2022-12-12 15:38:51,959 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.5387096774193548 [2022-12-12 15:38:51,959 INFO L175 Difference]: Start difference. First operand has 262 places, 1286 transitions, 17466 flow. Second operand 30 states and 501 transitions. [2022-12-12 15:38:51,959 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 2205 transitions, 32324 flow [2022-12-12 15:39:05,657 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 2205 transitions, 30888 flow, removed 608 selfloop flow, removed 14 redundant places. [2022-12-12 15:39:05,682 INFO L231 Difference]: Finished difference. Result has 291 places, 1884 transitions, 28912 flow [2022-12-12 15:39:05,683 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=16602, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1286, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=495, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=705, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=28912, PETRI_PLACES=291, PETRI_TRANSITIONS=1884} [2022-12-12 15:39:05,684 INFO L295 CegarLoopForPetriNet]: 39 programPoint places, 252 predicate places. [2022-12-12 15:39:05,684 INFO L495 AbstractCegarLoop]: Abstraction has has 291 places, 1884 transitions, 28912 flow [2022-12-12 15:39:05,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 3.6818181818181817) internal successors, (81), 22 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 15:39:05,684 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 15:39:05,684 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 15:39:05,691 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-12 15:39:05,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 15:39:05,889 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 2 more)] === [2022-12-12 15:39:05,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 15:39:05,889 INFO L85 PathProgramCache]: Analyzing trace with hash 1188856095, now seen corresponding path program 5 times [2022-12-12 15:39:05,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 15:39:05,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965585470] [2022-12-12 15:39:05,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 15:39:05,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 15:39:05,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 15:39:06,531 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 15:39:06,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 15:39:06,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965585470] [2022-12-12 15:39:06,532 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965585470] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 15:39:06,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1906966030] [2022-12-12 15:39:06,532 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-12 15:39:06,532 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 15:39:06,532 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 15:39:06,533 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 15:39:06,535 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-12 15:39:06,656 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-12 15:39:06,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 15:39:06,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 57 conjunts are in the unsatisfiable core [2022-12-12 15:39:06,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 15:39:06,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-12 15:39:06,840 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-12-12 15:39:06,905 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-12 15:39:06,907 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 15:39:06,907 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 10 [2022-12-12 15:39:06,994 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 15:39:06,994 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 15:39:07,123 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 27 [2022-12-12 15:39:07,187 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 15:39:07,188 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1906966030] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 15:39:07,188 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 15:39:07,188 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 23 [2022-12-12 15:39:07,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967467740] [2022-12-12 15:39:07,188 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 15:39:07,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-12-12 15:39:07,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 15:39:07,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-12-12 15:39:07,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=503, Unknown=1, NotChecked=0, Total=600 [2022-12-12 15:39:07,189 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 31 [2022-12-12 15:39:07,189 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 1884 transitions, 28912 flow. Second operand has 25 states, 24 states have (on average 3.4583333333333335) internal successors, (83), 24 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 15:39:07,189 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 15:39:07,189 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 31 [2022-12-12 15:39:07,189 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 15:39:36,062 INFO L130 PetriNetUnfolder]: 62575/83388 cut-off events. [2022-12-12 15:39:36,062 INFO L131 PetriNetUnfolder]: For 602663/602663 co-relation queries the response was YES. [2022-12-12 15:39:37,691 INFO L83 FinitePrefix]: Finished finitePrefix Result has 457855 conditions, 83388 events. 62575/83388 cut-off events. For 602663/602663 co-relation queries the response was YES. Maximal size of possible extension queue 2961. Compared 495771 event pairs, 8587 based on Foata normal form. 19/83407 useless extension candidates. Maximal degree in co-relation 455960. Up to 39927 conditions per place. [2022-12-12 15:39:37,980 INFO L137 encePairwiseOnDemand]: 17/31 looper letters, 1864 selfloop transitions, 1024 changer transitions 41/2929 dead transitions. [2022-12-12 15:39:37,980 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 2929 transitions, 43721 flow [2022-12-12 15:39:37,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-12-12 15:39:37,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2022-12-12 15:39:37,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 948 transitions. [2022-12-12 15:39:37,982 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.4704714640198511 [2022-12-12 15:39:37,983 INFO L175 Difference]: Start difference. First operand has 291 places, 1884 transitions, 28912 flow. Second operand 65 states and 948 transitions. [2022-12-12 15:39:37,983 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 355 places, 2929 transitions, 43721 flow [2022-12-12 15:40:00,991 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 350 places, 2929 transitions, 40912 flow, removed 1177 selfloop flow, removed 5 redundant places. [2022-12-12 15:40:01,025 INFO L231 Difference]: Finished difference. Result has 370 places, 2298 transitions, 35903 flow [2022-12-12 15:40:01,026 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=26227, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1868, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=648, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=65, PETRI_FLOW=35903, PETRI_PLACES=370, PETRI_TRANSITIONS=2298} [2022-12-12 15:40:01,027 INFO L295 CegarLoopForPetriNet]: 39 programPoint places, 331 predicate places. [2022-12-12 15:40:01,027 INFO L495 AbstractCegarLoop]: Abstraction has has 370 places, 2298 transitions, 35903 flow [2022-12-12 15:40:01,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 3.4583333333333335) internal successors, (83), 24 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 15:40:01,027 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 15:40:01,027 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 15:40:01,034 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-12-12 15:40:01,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-12-12 15:40:01,234 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 2 more)] === [2022-12-12 15:40:01,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 15:40:01,234 INFO L85 PathProgramCache]: Analyzing trace with hash 121022267, now seen corresponding path program 6 times [2022-12-12 15:40:01,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 15:40:01,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832256251] [2022-12-12 15:40:01,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 15:40:01,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 15:40:01,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 15:40:01,601 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 15:40:01,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 15:40:01,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832256251] [2022-12-12 15:40:01,601 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832256251] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 15:40:01,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285728987] [2022-12-12 15:40:01,601 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-12 15:40:01,602 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 15:40:01,602 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 15:40:01,604 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 15:40:01,605 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-12 15:40:01,718 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-12-12 15:40:01,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 15:40:01,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 51 conjunts are in the unsatisfiable core [2022-12-12 15:40:01,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 15:40:01,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-12 15:40:01,832 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-12-12 15:40:01,884 INFO L321 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-12-12 15:40:01,884 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2022-12-12 15:40:01,955 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 15:40:01,955 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 15:40:02,126 INFO L321 Elim1Store]: treesize reduction 8, result has 33.3 percent of original size [2022-12-12 15:40:02,126 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 35 [2022-12-12 15:40:02,198 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 15:40:02,198 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [285728987] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 15:40:02,198 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 15:40:02,198 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 21 [2022-12-12 15:40:02,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842768879] [2022-12-12 15:40:02,198 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 15:40:02,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-12-12 15:40:02,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 15:40:02,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-12-12 15:40:02,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=396, Unknown=1, NotChecked=0, Total=506 [2022-12-12 15:40:02,199 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 31 [2022-12-12 15:40:02,199 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 370 places, 2298 transitions, 35903 flow. Second operand has 23 states, 22 states have (on average 3.6818181818181817) internal successors, (81), 22 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 15:40:02,199 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 15:40:02,200 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 31 [2022-12-12 15:40:02,200 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 15:40:32,731 INFO L130 PetriNetUnfolder]: 74519/99012 cut-off events. [2022-12-12 15:40:32,732 INFO L131 PetriNetUnfolder]: For 701744/701744 co-relation queries the response was YES. [2022-12-12 15:40:35,572 INFO L83 FinitePrefix]: Finished finitePrefix Result has 560935 conditions, 99012 events. 74519/99012 cut-off events. For 701744/701744 co-relation queries the response was YES. Maximal size of possible extension queue 3342. Compared 592864 event pairs, 9420 based on Foata normal form. 11/99023 useless extension candidates. Maximal degree in co-relation 558975. Up to 78508 conditions per place. [2022-12-12 15:40:35,959 INFO L137 encePairwiseOnDemand]: 18/31 looper letters, 1780 selfloop transitions, 1316 changer transitions 17/3113 dead transitions. [2022-12-12 15:40:35,960 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 404 places, 3113 transitions, 52548 flow [2022-12-12 15:40:35,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-12-12 15:40:35,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2022-12-12 15:40:35,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 499 transitions. [2022-12-12 15:40:35,961 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.4599078341013825 [2022-12-12 15:40:35,961 INFO L175 Difference]: Start difference. First operand has 370 places, 2298 transitions, 35903 flow. Second operand 35 states and 499 transitions. [2022-12-12 15:40:35,961 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 404 places, 3113 transitions, 52548 flow [2022-12-12 15:41:06,156 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 394 places, 3113 transitions, 48621 flow, removed 1632 selfloop flow, removed 10 redundant places. [2022-12-12 15:41:06,201 INFO L231 Difference]: Finished difference. Result has 409 places, 2831 transitions, 45587 flow [2022-12-12 15:41:06,202 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=32868, PETRI_DIFFERENCE_MINUEND_PLACES=360, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2298, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=893, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1321, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=45587, PETRI_PLACES=409, PETRI_TRANSITIONS=2831} [2022-12-12 15:41:06,203 INFO L295 CegarLoopForPetriNet]: 39 programPoint places, 370 predicate places. [2022-12-12 15:41:06,203 INFO L495 AbstractCegarLoop]: Abstraction has has 409 places, 2831 transitions, 45587 flow [2022-12-12 15:41:06,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 3.6818181818181817) internal successors, (81), 22 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 15:41:06,203 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 15:41:06,203 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 15:41:06,210 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-12 15:41:06,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-12-12 15:41:06,408 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 2 more)] === [2022-12-12 15:41:06,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 15:41:06,409 INFO L85 PathProgramCache]: Analyzing trace with hash 742731521, now seen corresponding path program 3 times [2022-12-12 15:41:06,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 15:41:06,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710922677] [2022-12-12 15:41:06,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 15:41:06,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 15:41:06,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 15:41:06,759 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 15:41:06,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 15:41:06,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710922677] [2022-12-12 15:41:06,759 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1710922677] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 15:41:06,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [952313726] [2022-12-12 15:41:06,759 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-12 15:41:06,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 15:41:06,760 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 15:41:06,761 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 15:41:06,776 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-12 15:41:06,892 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-12 15:41:06,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 15:41:06,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 52 conjunts are in the unsatisfiable core [2022-12-12 15:41:06,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 15:41:07,028 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-12 15:41:07,029 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 15:41:07,030 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 10 [2022-12-12 15:41:07,103 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 15:41:07,103 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 15:41:07,206 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-12 15:41:07,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [952313726] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 15:41:07,206 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 15:41:07,206 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 5] total 17 [2022-12-12 15:41:07,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127502251] [2022-12-12 15:41:07,206 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 15:41:07,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-12 15:41:07,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 15:41:07,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-12 15:41:07,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2022-12-12 15:41:07,207 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 31 [2022-12-12 15:41:07,207 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 409 places, 2831 transitions, 45587 flow. Second operand has 18 states, 17 states have (on average 4.764705882352941) internal successors, (81), 18 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 15:41:07,207 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 15:41:07,207 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 31 [2022-12-12 15:41:07,207 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand