/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-NoLbe.epf --traceabstraction.use.on-demand.petri.net.difference true --traceabstraction.size.reduction.to.apply.after.petri.net.difference REMOVE_REDUNDANT_FLOW -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/popl20-bad-threaded-sum-2.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.repeated-lipton-a802222-m [2022-12-12 13:06:12,391 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-12 13:06:12,393 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-12 13:06:12,413 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-12 13:06:12,413 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-12 13:06:12,414 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-12 13:06:12,415 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-12 13:06:12,416 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-12 13:06:12,417 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-12 13:06:12,418 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-12 13:06:12,419 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-12 13:06:12,419 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-12 13:06:12,420 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-12 13:06:12,421 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-12 13:06:12,421 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-12 13:06:12,422 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-12 13:06:12,423 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-12 13:06:12,423 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-12 13:06:12,424 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-12 13:06:12,426 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-12 13:06:12,426 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-12 13:06:12,431 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-12 13:06:12,432 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-12 13:06:12,433 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-12 13:06:12,435 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-12 13:06:12,435 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-12 13:06:12,435 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-12 13:06:12,436 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-12 13:06:12,436 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-12 13:06:12,437 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-12 13:06:12,437 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-12 13:06:12,438 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-12 13:06:12,438 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-12 13:06:12,438 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-12 13:06:12,439 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-12 13:06:12,439 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-12 13:06:12,440 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-12 13:06:12,440 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-12 13:06:12,440 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-12 13:06:12,440 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-12 13:06:12,441 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-12 13:06:12,442 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-NoLbe.epf [2022-12-12 13:06:12,457 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-12 13:06:12,458 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-12 13:06:12,458 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-12 13:06:12,458 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-12 13:06:12,459 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-12 13:06:12,459 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-12 13:06:12,459 INFO L138 SettingsManager]: * Use SBE=true [2022-12-12 13:06:12,459 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-12 13:06:12,459 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-12 13:06:12,459 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-12 13:06:12,459 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-12 13:06:12,460 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-12 13:06:12,460 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-12 13:06:12,460 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-12 13:06:12,460 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-12 13:06:12,460 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-12 13:06:12,460 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-12 13:06:12,460 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-12 13:06:12,460 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-12 13:06:12,460 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-12 13:06:12,460 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-12 13:06:12,461 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-12-12 13:06:12,461 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-12 13:06:12,461 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-12 13:06:12,461 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-12 13:06:12,461 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-12 13:06:12,461 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-12 13:06:12,461 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-12-12 13:06:12,461 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-12 13:06:12,461 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-12 13:06:12,462 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-12 13:06:12,462 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use on-demand Petri net difference -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Size reduction to apply after Petri net difference -> REMOVE_REDUNDANT_FLOW [2022-12-12 13:06:12,730 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-12 13:06:12,749 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-12 13:06:12,751 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-12 13:06:12,752 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-12 13:06:12,752 INFO L275 PluginConnector]: CDTParser initialized [2022-12-12 13:06:12,756 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-bad-threaded-sum-2.wvr.c [2022-12-12 13:06:13,742 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-12 13:06:13,912 INFO L351 CDTParser]: Found 1 translation units. [2022-12-12 13:06:13,912 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-threaded-sum-2.wvr.c [2022-12-12 13:06:13,918 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/17ef287fb/211d075fde7b4c4db80734eb100af498/FLAG77b5badcc [2022-12-12 13:06:13,930 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/17ef287fb/211d075fde7b4c4db80734eb100af498 [2022-12-12 13:06:13,932 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-12 13:06:13,933 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-12-12 13:06:13,933 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-12 13:06:13,933 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-12 13:06:13,935 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-12 13:06:13,936 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.12 01:06:13" (1/1) ... [2022-12-12 13:06:13,936 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@12907ba2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 01:06:13, skipping insertion in model container [2022-12-12 13:06:13,936 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.12 01:06:13" (1/1) ... [2022-12-12 13:06:13,941 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-12 13:06:13,952 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-12 13:06:14,077 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-12 13:06:14,079 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-12 13:06:14,079 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-12 13:06:14,083 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-12 13:06:14,083 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-12 13:06:14,084 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-12 13:06:14,086 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-12 13:06:14,087 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-12 13:06:14,087 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-12 13:06:14,088 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-12 13:06:14,088 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-12 13:06:14,088 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-12 13:06:14,088 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-12 13:06:14,089 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-12 13:06:14,103 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-threaded-sum-2.wvr.c[2476,2489] [2022-12-12 13:06:14,106 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-12 13:06:14,117 INFO L203 MainTranslator]: Completed pre-run [2022-12-12 13:06:14,128 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-12 13:06:14,129 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-12 13:06:14,129 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-12 13:06:14,130 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-12 13:06:14,131 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-12 13:06:14,133 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-12 13:06:14,134 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-12 13:06:14,135 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-12 13:06:14,135 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-12 13:06:14,136 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-12 13:06:14,136 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-12 13:06:14,138 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-12 13:06:14,139 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-12 13:06:14,140 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-12 13:06:14,150 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-threaded-sum-2.wvr.c[2476,2489] [2022-12-12 13:06:14,151 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-12 13:06:14,161 INFO L208 MainTranslator]: Completed translation [2022-12-12 13:06:14,161 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 01:06:14 WrapperNode [2022-12-12 13:06:14,161 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-12 13:06:14,163 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-12 13:06:14,163 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-12 13:06:14,163 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-12 13:06:14,168 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 01:06:14" (1/1) ... [2022-12-12 13:06:14,178 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 01:06:14" (1/1) ... [2022-12-12 13:06:14,195 INFO L138 Inliner]: procedures = 21, calls = 34, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 59 [2022-12-12 13:06:14,195 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-12 13:06:14,196 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-12 13:06:14,196 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-12 13:06:14,196 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-12 13:06:14,202 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 01:06:14" (1/1) ... [2022-12-12 13:06:14,202 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 01:06:14" (1/1) ... [2022-12-12 13:06:14,205 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 01:06:14" (1/1) ... [2022-12-12 13:06:14,206 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 01:06:14" (1/1) ... [2022-12-12 13:06:14,214 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 01:06:14" (1/1) ... [2022-12-12 13:06:14,216 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 01:06:14" (1/1) ... [2022-12-12 13:06:14,220 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 01:06:14" (1/1) ... [2022-12-12 13:06:14,221 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 01:06:14" (1/1) ... [2022-12-12 13:06:14,222 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-12 13:06:14,223 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-12 13:06:14,223 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-12 13:06:14,223 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-12 13:06:14,223 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 01:06:14" (1/1) ... [2022-12-12 13:06:14,227 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-12 13:06:14,237 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 13:06:14,248 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 13:06:14,255 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 13:06:14,276 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-12 13:06:14,276 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-12-12 13:06:14,276 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-12-12 13:06:14,276 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-12-12 13:06:14,276 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-12-12 13:06:14,276 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-12 13:06:14,277 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-12 13:06:14,277 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-12 13:06:14,277 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-12-12 13:06:14,277 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-12-12 13:06:14,277 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-12 13:06:14,277 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-12 13:06:14,277 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-12 13:06:14,277 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-12 13:06:14,278 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 13:06:14,352 INFO L236 CfgBuilder]: Building ICFG [2022-12-12 13:06:14,353 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-12 13:06:14,547 INFO L277 CfgBuilder]: Performing block encoding [2022-12-12 13:06:14,579 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-12 13:06:14,580 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2022-12-12 13:06:14,581 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.12 01:06:14 BoogieIcfgContainer [2022-12-12 13:06:14,581 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-12 13:06:14,583 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-12 13:06:14,583 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-12 13:06:14,585 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-12 13:06:14,585 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.12 01:06:13" (1/3) ... [2022-12-12 13:06:14,586 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a517b5e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.12 01:06:14, skipping insertion in model container [2022-12-12 13:06:14,586 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 01:06:14" (2/3) ... [2022-12-12 13:06:14,586 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a517b5e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.12 01:06:14, skipping insertion in model container [2022-12-12 13:06:14,586 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.12 01:06:14" (3/3) ... [2022-12-12 13:06:14,587 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-threaded-sum-2.wvr.c [2022-12-12 13:06:14,599 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-12 13:06:14,599 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-12 13:06:14,599 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-12 13:06:14,637 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-12-12 13:06:14,657 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 82 places, 81 transitions, 178 flow [2022-12-12 13:06:14,686 INFO L130 PetriNetUnfolder]: 6/79 cut-off events. [2022-12-12 13:06:14,687 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-12 13:06:14,690 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88 conditions, 79 events. 6/79 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 41 event pairs, 0 based on Foata normal form. 0/72 useless extension candidates. Maximal degree in co-relation 47. Up to 2 conditions per place. [2022-12-12 13:06:14,690 INFO L82 GeneralOperation]: Start removeDead. Operand has 82 places, 81 transitions, 178 flow [2022-12-12 13:06:14,693 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 72 places, 71 transitions, 154 flow [2022-12-12 13:06:14,700 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-12 13:06:14,704 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;@310497eb, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, Conditionality=CONDITIONAL_DISJUNCTIVE, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-12 13:06:14,704 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-12-12 13:06:14,718 INFO L130 PetriNetUnfolder]: 6/70 cut-off events. [2022-12-12 13:06:14,718 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-12 13:06:14,718 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 13:06:14,719 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:06:14,719 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 13:06:14,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 13:06:14,723 INFO L85 PathProgramCache]: Analyzing trace with hash 1572774383, now seen corresponding path program 1 times [2022-12-12 13:06:14,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 13:06:14,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727819740] [2022-12-12 13:06:14,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 13:06:14,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 13:06:14,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 13:06:15,424 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 13:06:15,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 13:06:15,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727819740] [2022-12-12 13:06:15,425 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727819740] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 13:06:15,426 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-12 13:06:15,426 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-12 13:06:15,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407591087] [2022-12-12 13:06:15,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 13:06:15,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-12 13:06:15,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 13:06:15,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-12 13:06:15,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-12 13:06:15,488 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 81 [2022-12-12 13:06:15,490 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 71 transitions, 154 flow. Second operand has 6 states, 6 states have (on average 53.0) internal successors, (318), 6 states have internal predecessors, (318), 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 13:06:15,490 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 13:06:15,490 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 81 [2022-12-12 13:06:15,491 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 13:06:15,661 INFO L130 PetriNetUnfolder]: 44/152 cut-off events. [2022-12-12 13:06:15,661 INFO L131 PetriNetUnfolder]: For 37/37 co-relation queries the response was YES. [2022-12-12 13:06:15,662 INFO L83 FinitePrefix]: Finished finitePrefix Result has 276 conditions, 152 events. 44/152 cut-off events. For 37/37 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 417 event pairs, 2 based on Foata normal form. 13/154 useless extension candidates. Maximal degree in co-relation 187. Up to 53 conditions per place. [2022-12-12 13:06:15,663 INFO L137 encePairwiseOnDemand]: 69/81 looper letters, 34 selfloop transitions, 6 changer transitions 2/83 dead transitions. [2022-12-12 13:06:15,663 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 83 transitions, 271 flow [2022-12-12 13:06:15,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-12 13:06:15,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-12 13:06:15,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 451 transitions. [2022-12-12 13:06:15,674 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.6959876543209876 [2022-12-12 13:06:15,676 INFO L295 CegarLoopForPetriNet]: 72 programPoint places, 7 predicate places. [2022-12-12 13:06:15,677 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 83 transitions, 271 flow [2022-12-12 13:06:15,680 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 83 transitions, 233 flow, removed 10 selfloop flow, removed 6 redundant places. [2022-12-12 13:06:15,681 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 83 transitions, 233 flow [2022-12-12 13:06:15,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 53.0) internal successors, (318), 6 states have internal predecessors, (318), 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 13:06:15,681 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 13:06:15,681 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:06:15,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-12 13:06:15,682 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 13:06:15,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 13:06:15,683 INFO L85 PathProgramCache]: Analyzing trace with hash 1336082922, now seen corresponding path program 1 times [2022-12-12 13:06:15,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 13:06:15,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818469267] [2022-12-12 13:06:15,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 13:06:15,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 13:06:15,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 13:06:15,979 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 13:06:15,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 13:06:15,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818469267] [2022-12-12 13:06:15,979 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818469267] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 13:06:15,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1372486365] [2022-12-12 13:06:15,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 13:06:15,980 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 13:06:15,980 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 13:06:15,983 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 13:06:15,984 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 13:06:16,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 13:06:16,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-12 13:06:16,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 13:06:16,357 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 13:06:16,357 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-12 13:06:16,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1372486365] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 13:06:16,357 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-12 13:06:16,358 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 11 [2022-12-12 13:06:16,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308891734] [2022-12-12 13:06:16,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 13:06:16,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-12 13:06:16,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 13:06:16,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-12 13:06:16,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2022-12-12 13:06:16,360 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 81 [2022-12-12 13:06:16,361 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 83 transitions, 233 flow. Second operand has 6 states, 6 states have (on average 51.0) internal successors, (306), 6 states have internal predecessors, (306), 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 13:06:16,361 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 13:06:16,361 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 81 [2022-12-12 13:06:16,361 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 13:06:16,539 INFO L130 PetriNetUnfolder]: 64/203 cut-off events. [2022-12-12 13:06:16,539 INFO L131 PetriNetUnfolder]: For 44/61 co-relation queries the response was YES. [2022-12-12 13:06:16,540 INFO L83 FinitePrefix]: Finished finitePrefix Result has 461 conditions, 203 events. 64/203 cut-off events. For 44/61 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 571 event pairs, 7 based on Foata normal form. 0/186 useless extension candidates. Maximal degree in co-relation 211. Up to 85 conditions per place. [2022-12-12 13:06:16,541 INFO L137 encePairwiseOnDemand]: 73/81 looper letters, 45 selfloop transitions, 10 changer transitions 2/96 dead transitions. [2022-12-12 13:06:16,541 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 96 transitions, 396 flow [2022-12-12 13:06:16,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-12 13:06:16,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-12 13:06:16,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 374 transitions. [2022-12-12 13:06:16,543 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.6596119929453262 [2022-12-12 13:06:16,544 INFO L295 CegarLoopForPetriNet]: 72 programPoint places, 7 predicate places. [2022-12-12 13:06:16,544 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 96 transitions, 396 flow [2022-12-12 13:06:16,546 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 96 transitions, 364 flow, removed 14 selfloop flow, removed 2 redundant places. [2022-12-12 13:06:16,546 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 96 transitions, 364 flow [2022-12-12 13:06:16,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 51.0) internal successors, (306), 6 states have internal predecessors, (306), 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 13:06:16,546 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 13:06:16,546 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:06:16,562 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-12-12 13:06:16,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 13:06:16,753 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 13:06:16,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 13:06:16,754 INFO L85 PathProgramCache]: Analyzing trace with hash 1204448716, now seen corresponding path program 2 times [2022-12-12 13:06:16,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 13:06:16,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069666714] [2022-12-12 13:06:16,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 13:06:16,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 13:06:16,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 13:06:17,014 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 13:06:17,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 13:06:17,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069666714] [2022-12-12 13:06:17,016 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069666714] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 13:06:17,016 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-12 13:06:17,016 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-12 13:06:17,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063577656] [2022-12-12 13:06:17,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 13:06:17,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-12 13:06:17,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 13:06:17,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-12 13:06:17,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-12-12 13:06:17,018 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 81 [2022-12-12 13:06:17,019 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 96 transitions, 364 flow. Second operand has 6 states, 6 states have (on average 57.166666666666664) internal successors, (343), 6 states have internal predecessors, (343), 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 13:06:17,019 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 13:06:17,019 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 81 [2022-12-12 13:06:17,019 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 13:06:17,226 INFO L130 PetriNetUnfolder]: 141/425 cut-off events. [2022-12-12 13:06:17,226 INFO L131 PetriNetUnfolder]: For 194/271 co-relation queries the response was YES. [2022-12-12 13:06:17,230 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1220 conditions, 425 events. 141/425 cut-off events. For 194/271 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1882 event pairs, 5 based on Foata normal form. 9/397 useless extension candidates. Maximal degree in co-relation 880. Up to 182 conditions per place. [2022-12-12 13:06:17,232 INFO L137 encePairwiseOnDemand]: 71/81 looper letters, 74 selfloop transitions, 54 changer transitions 2/173 dead transitions. [2022-12-12 13:06:17,232 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 173 transitions, 1039 flow [2022-12-12 13:06:17,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-12 13:06:17,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-12 13:06:17,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 445 transitions. [2022-12-12 13:06:17,234 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.7848324514991182 [2022-12-12 13:06:17,235 INFO L295 CegarLoopForPetriNet]: 72 programPoint places, 11 predicate places. [2022-12-12 13:06:17,235 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 173 transitions, 1039 flow [2022-12-12 13:06:17,240 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 173 transitions, 1023 flow, removed 8 selfloop flow, removed 0 redundant places. [2022-12-12 13:06:17,240 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 173 transitions, 1023 flow [2022-12-12 13:06:17,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 57.166666666666664) internal successors, (343), 6 states have internal predecessors, (343), 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 13:06:17,240 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 13:06:17,256 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:06:17,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-12 13:06:17,257 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 13:06:17,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 13:06:17,259 INFO L85 PathProgramCache]: Analyzing trace with hash 45142766, now seen corresponding path program 3 times [2022-12-12 13:06:17,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 13:06:17,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93270955] [2022-12-12 13:06:17,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 13:06:17,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 13:06:17,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 13:06:17,516 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 13:06:17,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 13:06:17,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93270955] [2022-12-12 13:06:17,517 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [93270955] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 13:06:17,517 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-12 13:06:17,517 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-12 13:06:17,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38862213] [2022-12-12 13:06:17,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 13:06:17,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-12 13:06:17,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 13:06:17,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-12 13:06:17,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-12 13:06:17,520 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 81 [2022-12-12 13:06:17,521 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 173 transitions, 1023 flow. Second operand has 7 states, 7 states have (on average 56.714285714285715) internal successors, (397), 7 states have internal predecessors, (397), 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 13:06:17,521 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 13:06:17,521 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 81 [2022-12-12 13:06:17,521 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 13:06:17,798 INFO L130 PetriNetUnfolder]: 219/670 cut-off events. [2022-12-12 13:06:17,798 INFO L131 PetriNetUnfolder]: For 572/817 co-relation queries the response was YES. [2022-12-12 13:06:17,799 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2411 conditions, 670 events. 219/670 cut-off events. For 572/817 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 3720 event pairs, 0 based on Foata normal form. 33/647 useless extension candidates. Maximal degree in co-relation 1739. Up to 325 conditions per place. [2022-12-12 13:06:17,803 INFO L137 encePairwiseOnDemand]: 72/81 looper letters, 123 selfloop transitions, 69 changer transitions 2/237 dead transitions. [2022-12-12 13:06:17,804 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 237 transitions, 1900 flow [2022-12-12 13:06:17,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-12 13:06:17,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-12-12 13:06:17,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 621 transitions. [2022-12-12 13:06:17,806 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.7666666666666667 [2022-12-12 13:06:17,807 INFO L295 CegarLoopForPetriNet]: 72 programPoint places, 20 predicate places. [2022-12-12 13:06:17,808 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 237 transitions, 1900 flow [2022-12-12 13:06:17,812 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 237 transitions, 1682 flow, removed 109 selfloop flow, removed 0 redundant places. [2022-12-12 13:06:17,814 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 237 transitions, 1682 flow [2022-12-12 13:06:17,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 56.714285714285715) internal successors, (397), 7 states have internal predecessors, (397), 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 13:06:17,815 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 13:06:17,819 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:06:17,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-12 13:06:17,820 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 13:06:17,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 13:06:17,820 INFO L85 PathProgramCache]: Analyzing trace with hash -436071434, now seen corresponding path program 4 times [2022-12-12 13:06:17,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 13:06:17,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261596731] [2022-12-12 13:06:17,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 13:06:17,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 13:06:17,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 13:06:18,151 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 13:06:18,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 13:06:18,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261596731] [2022-12-12 13:06:18,153 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261596731] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 13:06:18,153 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-12 13:06:18,153 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-12 13:06:18,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214404872] [2022-12-12 13:06:18,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 13:06:18,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-12 13:06:18,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 13:06:18,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-12 13:06:18,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-12-12 13:06:18,155 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 81 [2022-12-12 13:06:18,156 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 237 transitions, 1682 flow. Second operand has 7 states, 7 states have (on average 56.714285714285715) internal successors, (397), 7 states have internal predecessors, (397), 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 13:06:18,156 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 13:06:18,156 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 81 [2022-12-12 13:06:18,156 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 13:06:18,402 INFO L130 PetriNetUnfolder]: 227/688 cut-off events. [2022-12-12 13:06:18,403 INFO L131 PetriNetUnfolder]: For 557/748 co-relation queries the response was YES. [2022-12-12 13:06:18,404 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2741 conditions, 688 events. 227/688 cut-off events. For 557/748 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 3885 event pairs, 2 based on Foata normal form. 42/684 useless extension candidates. Maximal degree in co-relation 2028. Up to 310 conditions per place. [2022-12-12 13:06:18,407 INFO L137 encePairwiseOnDemand]: 72/81 looper letters, 139 selfloop transitions, 83 changer transitions 2/267 dead transitions. [2022-12-12 13:06:18,407 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 267 transitions, 2376 flow [2022-12-12 13:06:18,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-12 13:06:18,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-12-12 13:06:18,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 567 transitions. [2022-12-12 13:06:18,409 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.7777777777777778 [2022-12-12 13:06:18,411 INFO L295 CegarLoopForPetriNet]: 72 programPoint places, 28 predicate places. [2022-12-12 13:06:18,411 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 267 transitions, 2376 flow [2022-12-12 13:06:18,417 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 267 transitions, 2022 flow, removed 134 selfloop flow, removed 3 redundant places. [2022-12-12 13:06:18,417 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 267 transitions, 2022 flow [2022-12-12 13:06:18,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 56.714285714285715) internal successors, (397), 7 states have internal predecessors, (397), 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 13:06:18,417 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 13:06:18,418 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:06:18,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-12 13:06:18,418 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 13:06:18,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 13:06:18,418 INFO L85 PathProgramCache]: Analyzing trace with hash 491997964, now seen corresponding path program 5 times [2022-12-12 13:06:18,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 13:06:18,418 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289525831] [2022-12-12 13:06:18,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 13:06:18,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 13:06:18,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 13:06:18,691 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 13:06:18,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 13:06:18,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289525831] [2022-12-12 13:06:18,692 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289525831] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 13:06:18,692 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-12 13:06:18,692 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-12 13:06:18,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138005055] [2022-12-12 13:06:18,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 13:06:18,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-12 13:06:18,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 13:06:18,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-12 13:06:18,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-12 13:06:18,693 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 81 [2022-12-12 13:06:18,693 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 267 transitions, 2022 flow. Second operand has 7 states, 7 states have (on average 56.714285714285715) internal successors, (397), 7 states have internal predecessors, (397), 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 13:06:18,693 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 13:06:18,694 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 81 [2022-12-12 13:06:18,694 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 13:06:19,019 INFO L130 PetriNetUnfolder]: 227/679 cut-off events. [2022-12-12 13:06:19,019 INFO L131 PetriNetUnfolder]: For 643/834 co-relation queries the response was YES. [2022-12-12 13:06:19,020 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2821 conditions, 679 events. 227/679 cut-off events. For 643/834 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 3786 event pairs, 2 based on Foata normal form. 47/682 useless extension candidates. Maximal degree in co-relation 2098. Up to 223 conditions per place. [2022-12-12 13:06:19,024 INFO L137 encePairwiseOnDemand]: 72/81 looper letters, 136 selfloop transitions, 85 changer transitions 2/266 dead transitions. [2022-12-12 13:06:19,024 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 266 transitions, 2457 flow [2022-12-12 13:06:19,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-12 13:06:19,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-12-12 13:06:19,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 681 transitions. [2022-12-12 13:06:19,026 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.7643097643097643 [2022-12-12 13:06:19,028 INFO L295 CegarLoopForPetriNet]: 72 programPoint places, 35 predicate places. [2022-12-12 13:06:19,028 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 266 transitions, 2457 flow [2022-12-12 13:06:19,036 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 266 transitions, 2001 flow, removed 145 selfloop flow, removed 8 redundant places. [2022-12-12 13:06:19,036 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 266 transitions, 2001 flow [2022-12-12 13:06:19,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 56.714285714285715) internal successors, (397), 7 states have internal predecessors, (397), 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 13:06:19,037 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 13:06:19,037 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:06:19,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-12 13:06:19,037 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 13:06:19,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 13:06:19,037 INFO L85 PathProgramCache]: Analyzing trace with hash 1121696378, now seen corresponding path program 6 times [2022-12-12 13:06:19,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 13:06:19,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935548595] [2022-12-12 13:06:19,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 13:06:19,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 13:06:19,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 13:06:19,263 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 13:06:19,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 13:06:19,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935548595] [2022-12-12 13:06:19,263 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935548595] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 13:06:19,263 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-12 13:06:19,264 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-12 13:06:19,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010899212] [2022-12-12 13:06:19,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 13:06:19,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-12 13:06:19,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 13:06:19,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-12 13:06:19,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-12 13:06:19,265 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 81 [2022-12-12 13:06:19,265 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 266 transitions, 2001 flow. Second operand has 6 states, 6 states have (on average 59.666666666666664) internal successors, (358), 6 states have internal predecessors, (358), 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 13:06:19,265 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 13:06:19,265 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 81 [2022-12-12 13:06:19,265 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 13:06:19,420 INFO L130 PetriNetUnfolder]: 232/666 cut-off events. [2022-12-12 13:06:19,420 INFO L131 PetriNetUnfolder]: For 599/828 co-relation queries the response was YES. [2022-12-12 13:06:19,422 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2814 conditions, 666 events. 232/666 cut-off events. For 599/828 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 3720 event pairs, 2 based on Foata normal form. 25/650 useless extension candidates. Maximal degree in co-relation 1368. Up to 254 conditions per place. [2022-12-12 13:06:19,425 INFO L137 encePairwiseOnDemand]: 73/81 looper letters, 198 selfloop transitions, 48 changer transitions 2/294 dead transitions. [2022-12-12 13:06:19,425 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 294 transitions, 2721 flow [2022-12-12 13:06:19,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-12 13:06:19,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-12 13:06:19,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 445 transitions. [2022-12-12 13:06:19,427 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.7848324514991182 [2022-12-12 13:06:19,428 INFO L295 CegarLoopForPetriNet]: 72 programPoint places, 33 predicate places. [2022-12-12 13:06:19,428 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 294 transitions, 2721 flow [2022-12-12 13:06:19,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 294 transitions, 2565 flow, removed 78 selfloop flow, removed 0 redundant places. [2022-12-12 13:06:19,433 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 294 transitions, 2565 flow [2022-12-12 13:06:19,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 59.666666666666664) internal successors, (358), 6 states have internal predecessors, (358), 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 13:06:19,435 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 13:06:19,435 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:06:19,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-12 13:06:19,436 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 13:06:19,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 13:06:19,436 INFO L85 PathProgramCache]: Analyzing trace with hash 1691859762, now seen corresponding path program 7 times [2022-12-12 13:06:19,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 13:06:19,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569237438] [2022-12-12 13:06:19,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 13:06:19,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 13:06:19,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 13:06:19,984 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 13:06:19,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 13:06:19,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569237438] [2022-12-12 13:06:19,985 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569237438] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 13:06:19,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455407731] [2022-12-12 13:06:19,985 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-12 13:06:19,985 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 13:06:19,985 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 13:06:19,987 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 13:06:20,000 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 13:06:20,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 13:06:20,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 26 conjunts are in the unsatisfiable core [2022-12-12 13:06:20,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 13:06:20,653 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 13:06:20,653 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 13:06:21,250 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 13:06:21,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [455407731] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 13:06:21,250 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 13:06:21,250 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 14] total 31 [2022-12-12 13:06:21,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378542845] [2022-12-12 13:06:21,250 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 13:06:21,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-12-12 13:06:21,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 13:06:21,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-12-12 13:06:21,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=718, Unknown=0, NotChecked=0, Total=930 [2022-12-12 13:06:21,253 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 42 out of 81 [2022-12-12 13:06:21,254 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 294 transitions, 2565 flow. Second operand has 31 states, 31 states have (on average 44.25806451612903) internal successors, (1372), 31 states have internal predecessors, (1372), 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 13:06:21,254 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 13:06:21,254 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 42 of 81 [2022-12-12 13:06:21,254 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 13:06:25,174 INFO L130 PetriNetUnfolder]: 1169/3343 cut-off events. [2022-12-12 13:06:25,174 INFO L131 PetriNetUnfolder]: For 2842/3270 co-relation queries the response was YES. [2022-12-12 13:06:25,179 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15604 conditions, 3343 events. 1169/3343 cut-off events. For 2842/3270 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 29981 event pairs, 21 based on Foata normal form. 61/3131 useless extension candidates. Maximal degree in co-relation 5340. Up to 1274 conditions per place. [2022-12-12 13:06:25,194 INFO L137 encePairwiseOnDemand]: 59/81 looper letters, 774 selfloop transitions, 566 changer transitions 301/1674 dead transitions. [2022-12-12 13:06:25,194 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 1674 transitions, 19162 flow [2022-12-12 13:06:25,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-12-12 13:06:25,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2022-12-12 13:06:25,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 4037 transitions. [2022-12-12 13:06:25,201 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.5728678870441323 [2022-12-12 13:06:25,201 INFO L295 CegarLoopForPetriNet]: 72 programPoint places, 119 predicate places. [2022-12-12 13:06:25,202 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 1674 transitions, 19162 flow [2022-12-12 13:06:25,230 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 1674 transitions, 16472 flow, removed 1333 selfloop flow, removed 7 redundant places. [2022-12-12 13:06:25,230 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 1674 transitions, 16472 flow [2022-12-12 13:06:25,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 44.25806451612903) internal successors, (1372), 31 states have internal predecessors, (1372), 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 13:06:25,231 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 13:06:25,231 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:06:25,252 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-12-12 13:06:25,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-12-12 13:06:25,438 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 13:06:25,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 13:06:25,438 INFO L85 PathProgramCache]: Analyzing trace with hash -1696220568, now seen corresponding path program 1 times [2022-12-12 13:06:25,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 13:06:25,438 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655876536] [2022-12-12 13:06:25,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 13:06:25,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 13:06:25,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 13:06:26,655 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 13:06:26,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 13:06:26,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655876536] [2022-12-12 13:06:26,655 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655876536] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 13:06:26,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984922249] [2022-12-12 13:06:26,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 13:06:26,656 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 13:06:26,656 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 13:06:26,657 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 13:06:26,683 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 13:06:26,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 13:06:26,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 28 conjunts are in the unsatisfiable core [2022-12-12 13:06:26,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 13:06:27,378 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 13:06:27,379 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 13:06:29,083 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 13:06:29,083 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [984922249] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 13:06:29,083 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 13:06:29,084 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 17, 17] total 35 [2022-12-12 13:06:29,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747585890] [2022-12-12 13:06:29,084 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 13:06:29,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-12-12 13:06:29,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 13:06:29,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-12-12 13:06:29,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=982, Unknown=0, NotChecked=0, Total=1190 [2022-12-12 13:06:29,086 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 81 [2022-12-12 13:06:29,087 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 1674 transitions, 16472 flow. Second operand has 35 states, 35 states have (on average 46.25714285714286) internal successors, (1619), 35 states have internal predecessors, (1619), 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 13:06:29,087 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 13:06:29,087 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 81 [2022-12-12 13:06:29,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 13:06:42,740 INFO L130 PetriNetUnfolder]: 2258/6795 cut-off events. [2022-12-12 13:06:42,740 INFO L131 PetriNetUnfolder]: For 8347/9094 co-relation queries the response was YES. [2022-12-12 13:06:42,750 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31628 conditions, 6795 events. 2258/6795 cut-off events. For 8347/9094 co-relation queries the response was YES. Maximal size of possible extension queue 604. Compared 73045 event pairs, 34 based on Foata normal form. 134/6381 useless extension candidates. Maximal degree in co-relation 8221. Up to 2052 conditions per place. [2022-12-12 13:06:42,787 INFO L137 encePairwiseOnDemand]: 60/81 looper letters, 1073 selfloop transitions, 829 changer transitions 889/3091 dead transitions. [2022-12-12 13:06:42,787 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 3091 transitions, 36736 flow [2022-12-12 13:06:42,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2022-12-12 13:06:42,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2022-12-12 13:06:42,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 5281 transitions. [2022-12-12 13:06:42,797 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.5873651429206985 [2022-12-12 13:06:42,798 INFO L295 CegarLoopForPetriNet]: 72 programPoint places, 222 predicate places. [2022-12-12 13:06:42,798 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 3091 transitions, 36736 flow [2022-12-12 13:06:42,929 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 3091 transitions, 35856 flow, removed 400 selfloop flow, removed 15 redundant places. [2022-12-12 13:06:42,930 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 3091 transitions, 35856 flow [2022-12-12 13:06:42,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 46.25714285714286) internal successors, (1619), 35 states have internal predecessors, (1619), 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 13:06:42,930 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 13:06:42,931 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:06:42,937 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-12-12 13:06:43,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 13:06:43,135 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 13:06:43,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 13:06:43,137 INFO L85 PathProgramCache]: Analyzing trace with hash -519948064, now seen corresponding path program 2 times [2022-12-12 13:06:43,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 13:06:43,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71536194] [2022-12-12 13:06:43,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 13:06:43,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 13:06:43,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 13:06:44,238 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 13:06:44,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 13:06:44,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71536194] [2022-12-12 13:06:44,238 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71536194] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 13:06:44,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [403031887] [2022-12-12 13:06:44,238 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-12 13:06:44,238 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 13:06:44,239 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 13:06:44,248 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 13:06:44,250 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 13:06:44,379 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-12 13:06:44,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 13:06:44,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 28 conjunts are in the unsatisfiable core [2022-12-12 13:06:44,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 13:06:45,284 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 13:06:45,284 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 13:06:47,869 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 13:06:47,869 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [403031887] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 13:06:47,870 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 13:06:47,870 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17, 17] total 37 [2022-12-12 13:06:47,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617230181] [2022-12-12 13:06:47,870 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 13:06:47,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-12-12 13:06:47,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 13:06:47,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-12-12 13:06:47,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=1123, Unknown=0, NotChecked=0, Total=1332 [2022-12-12 13:06:47,872 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 42 out of 81 [2022-12-12 13:06:47,874 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 3091 transitions, 35856 flow. Second operand has 37 states, 37 states have (on average 44.2972972972973) internal successors, (1639), 37 states have internal predecessors, (1639), 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 13:06:47,874 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 13:06:47,874 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 42 of 81 [2022-12-12 13:06:47,874 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 13:07:26,788 INFO L130 PetriNetUnfolder]: 3600/11199 cut-off events. [2022-12-12 13:07:26,789 INFO L131 PetriNetUnfolder]: For 18000/19552 co-relation queries the response was YES. [2022-12-12 13:07:26,806 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59854 conditions, 11199 events. 3600/11199 cut-off events. For 18000/19552 co-relation queries the response was YES. Maximal size of possible extension queue 974. Compared 133450 event pairs, 30 based on Foata normal form. 231/10576 useless extension candidates. Maximal degree in co-relation 18242. Up to 3495 conditions per place. [2022-12-12 13:07:26,866 INFO L137 encePairwiseOnDemand]: 57/81 looper letters, 1966 selfloop transitions, 1505 changer transitions 1843/5347 dead transitions. [2022-12-12 13:07:26,866 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 450 places, 5347 transitions, 73927 flow [2022-12-12 13:07:26,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 172 states. [2022-12-12 13:07:26,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2022-12-12 13:07:26,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 7817 transitions. [2022-12-12 13:07:26,873 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.561082400229687 [2022-12-12 13:07:26,873 INFO L295 CegarLoopForPetriNet]: 72 programPoint places, 378 predicate places. [2022-12-12 13:07:26,873 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 450 places, 5347 transitions, 73927 flow [2022-12-12 13:07:26,994 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 407 places, 5347 transitions, 69493 flow, removed 1968 selfloop flow, removed 43 redundant places. [2022-12-12 13:07:26,994 INFO L495 AbstractCegarLoop]: Abstraction has has 407 places, 5347 transitions, 69493 flow [2022-12-12 13:07:26,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 44.2972972972973) internal successors, (1639), 37 states have internal predecessors, (1639), 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 13:07:26,995 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 13:07:26,995 INFO L214 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:07:27,000 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-12-12 13:07:27,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 13:07:27,200 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 13:07:27,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 13:07:27,201 INFO L85 PathProgramCache]: Analyzing trace with hash 242247128, now seen corresponding path program 8 times [2022-12-12 13:07:27,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 13:07:27,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128866754] [2022-12-12 13:07:27,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 13:07:27,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 13:07:27,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 13:07:27,922 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 13:07:27,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 13:07:27,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128866754] [2022-12-12 13:07:27,922 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128866754] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 13:07:27,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851194018] [2022-12-12 13:07:27,922 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-12 13:07:27,922 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 13:07:27,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 13:07:27,924 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 13:07:27,927 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 13:07:28,016 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-12 13:07:28,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 13:07:28,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 40 conjunts are in the unsatisfiable core [2022-12-12 13:07:28,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 13:07:29,270 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 13:07:29,270 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 13:07:30,262 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 13:07:30,263 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1851194018] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 13:07:30,263 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 13:07:30,263 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 23, 20] total 49 [2022-12-12 13:07:30,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511091040] [2022-12-12 13:07:30,263 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 13:07:30,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-12-12 13:07:30,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 13:07:30,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-12-12 13:07:30,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=445, Invalid=1907, Unknown=0, NotChecked=0, Total=2352 [2022-12-12 13:07:30,265 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 42 out of 81 [2022-12-12 13:07:30,267 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 407 places, 5347 transitions, 69493 flow. Second operand has 49 states, 49 states have (on average 43.91836734693877) internal successors, (2152), 49 states have internal predecessors, (2152), 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 13:07:30,267 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 13:07:30,267 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 42 of 81 [2022-12-12 13:07:30,267 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 13:08:11,766 INFO L130 PetriNetUnfolder]: 6153/18398 cut-off events. [2022-12-12 13:08:11,766 INFO L131 PetriNetUnfolder]: For 30281/33278 co-relation queries the response was YES. [2022-12-12 13:08:11,790 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107176 conditions, 18398 events. 6153/18398 cut-off events. For 30281/33278 co-relation queries the response was YES. Maximal size of possible extension queue 1326. Compared 225756 event pairs, 55 based on Foata normal form. 349/17168 useless extension candidates. Maximal degree in co-relation 79143. Up to 6306 conditions per place. [2022-12-12 13:08:11,934 INFO L137 encePairwiseOnDemand]: 57/81 looper letters, 2906 selfloop transitions, 3545 changer transitions 3019/9503 dead transitions. [2022-12-12 13:08:11,934 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 606 places, 9503 transitions, 140188 flow [2022-12-12 13:08:11,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 200 states. [2022-12-12 13:08:11,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2022-12-12 13:08:11,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 9161 transitions. [2022-12-12 13:08:11,940 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.5654938271604938 [2022-12-12 13:08:11,940 INFO L295 CegarLoopForPetriNet]: 72 programPoint places, 534 predicate places. [2022-12-12 13:08:11,941 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 606 places, 9503 transitions, 140188 flow [2022-12-12 13:08:12,183 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 581 places, 9503 transitions, 136143 flow, removed 1939 selfloop flow, removed 25 redundant places. [2022-12-12 13:08:12,184 INFO L495 AbstractCegarLoop]: Abstraction has has 581 places, 9503 transitions, 136143 flow [2022-12-12 13:08:12,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 43.91836734693877) internal successors, (2152), 49 states have internal predecessors, (2152), 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 13:08:12,185 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 13:08:12,185 INFO L214 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:08:12,204 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 13:08:12,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-12-12 13:08:12,391 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 13:08:12,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 13:08:12,391 INFO L85 PathProgramCache]: Analyzing trace with hash -1700471935, now seen corresponding path program 3 times [2022-12-12 13:08:12,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 13:08:12,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375091365] [2022-12-12 13:08:12,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 13:08:12,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 13:08:12,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 13:08:14,296 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 13:08:14,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 13:08:14,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375091365] [2022-12-12 13:08:14,296 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375091365] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 13:08:14,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748277639] [2022-12-12 13:08:14,296 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-12 13:08:14,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 13:08:14,297 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 13:08:14,298 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 13:08:14,300 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 13:08:14,476 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-12-12 13:08:14,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 13:08:14,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 29 conjunts are in the unsatisfiable core [2022-12-12 13:08:14,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 13:08:15,574 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 13:08:15,574 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 13:08:20,252 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 13:08:20,252 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [748277639] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 13:08:20,252 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 13:08:20,252 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 18] total 43 [2022-12-12 13:08:20,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122167057] [2022-12-12 13:08:20,253 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 13:08:20,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-12-12 13:08:20,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 13:08:20,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-12-12 13:08:20,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=261, Invalid=1545, Unknown=0, NotChecked=0, Total=1806 [2022-12-12 13:08:20,256 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 42 out of 81 [2022-12-12 13:08:20,257 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 581 places, 9503 transitions, 136143 flow. Second operand has 43 states, 43 states have (on average 44.27906976744186) internal successors, (1904), 43 states have internal predecessors, (1904), 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 13:08:20,257 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 13:08:20,257 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 42 of 81 [2022-12-12 13:08:20,257 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 13:09:53,176 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.58s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-12 13:10:37,967 INFO L130 PetriNetUnfolder]: 7746/24056 cut-off events. [2022-12-12 13:10:37,968 INFO L131 PetriNetUnfolder]: For 55078/60105 co-relation queries the response was YES. [2022-12-12 13:10:38,016 INFO L83 FinitePrefix]: Finished finitePrefix Result has 154480 conditions, 24056 events. 7746/24056 cut-off events. For 55078/60105 co-relation queries the response was YES. Maximal size of possible extension queue 1790. Compared 315102 event pairs, 61 based on Foata normal form. 605/22797 useless extension candidates. Maximal degree in co-relation 81202. Up to 7724 conditions per place. [2022-12-12 13:10:38,228 INFO L137 encePairwiseOnDemand]: 54/81 looper letters, 4847 selfloop transitions, 3172 changer transitions 4564/12616 dead transitions. [2022-12-12 13:10:38,228 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 750 places, 12616 transitions, 207838 flow [2022-12-12 13:10:38,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 170 states. [2022-12-12 13:10:38,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2022-12-12 13:10:38,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 7770 transitions. [2022-12-12 13:10:38,243 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.5642701525054467 [2022-12-12 13:10:38,243 INFO L295 CegarLoopForPetriNet]: 72 programPoint places, 678 predicate places. [2022-12-12 13:10:38,244 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 750 places, 12616 transitions, 207838 flow [2022-12-12 13:10:38,524 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 719 places, 12616 transitions, 201460 flow, removed 3066 selfloop flow, removed 31 redundant places. [2022-12-12 13:10:38,525 INFO L495 AbstractCegarLoop]: Abstraction has has 719 places, 12616 transitions, 201460 flow [2022-12-12 13:10:38,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 44.27906976744186) internal successors, (1904), 43 states have internal predecessors, (1904), 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 13:10:38,526 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 13:10:38,526 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 13:10:38,533 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-12-12 13:10:38,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 13:10:38,732 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 13:10:38,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 13:10:38,733 INFO L85 PathProgramCache]: Analyzing trace with hash -1603176415, now seen corresponding path program 4 times [2022-12-12 13:10:38,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 13:10:38,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268468742] [2022-12-12 13:10:38,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 13:10:38,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 13:10:38,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 13:10:38,911 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 13:10:38,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 13:10:38,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268468742] [2022-12-12 13:10:38,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268468742] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 13:10:38,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2048599756] [2022-12-12 13:10:38,912 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-12 13:10:38,912 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 13:10:38,912 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 13:10:38,933 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 13:10:38,934 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 13:10:39,014 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-12 13:10:39,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 13:10:39,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-12 13:10:39,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 13:10:39,256 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 13:10:39,256 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 13:10:39,559 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 13:10:39,561 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2048599756] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 13:10:39,561 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 13:10:39,561 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 12, 7] total 17 [2022-12-12 13:10:39,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370149772] [2022-12-12 13:10:39,562 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 13:10:39,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-12 13:10:39,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 13:10:39,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-12 13:10:39,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2022-12-12 13:10:39,565 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 81 [2022-12-12 13:10:39,565 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 719 places, 12616 transitions, 201460 flow. Second operand has 17 states, 17 states have (on average 50.411764705882355) internal successors, (857), 17 states have internal predecessors, (857), 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 13:10:39,566 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 13:10:39,566 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 81 [2022-12-12 13:10:39,566 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 13:11:25,225 INFO L130 PetriNetUnfolder]: 9884/29296 cut-off events. [2022-12-12 13:11:25,225 INFO L131 PetriNetUnfolder]: For 77975/83209 co-relation queries the response was YES. [2022-12-12 13:11:25,291 INFO L83 FinitePrefix]: Finished finitePrefix Result has 210223 conditions, 29296 events. 9884/29296 cut-off events. For 77975/83209 co-relation queries the response was YES. Maximal size of possible extension queue 1972. Compared 382031 event pairs, 60 based on Foata normal form. 608/27747 useless extension candidates. Maximal degree in co-relation 128295. Up to 10594 conditions per place. [2022-12-12 13:11:25,417 INFO L137 encePairwiseOnDemand]: 69/81 looper letters, 4860 selfloop transitions, 4828 changer transitions 4323/15501 dead transitions. [2022-12-12 13:11:25,417 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 735 places, 15501 transitions, 281652 flow [2022-12-12 13:11:25,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-12-12 13:11:25,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2022-12-12 13:11:25,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 1628 transitions. [2022-12-12 13:11:25,419 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.6699588477366255 [2022-12-12 13:11:25,419 INFO L295 CegarLoopForPetriNet]: 72 programPoint places, 663 predicate places. [2022-12-12 13:11:25,420 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 735 places, 15501 transitions, 281652 flow [2022-12-12 13:11:25,822 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 730 places, 15501 transitions, 277772 flow, removed 1915 selfloop flow, removed 5 redundant places. [2022-12-12 13:11:25,823 INFO L495 AbstractCegarLoop]: Abstraction has has 730 places, 15501 transitions, 277772 flow [2022-12-12 13:11:25,823 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 50.411764705882355) internal successors, (857), 17 states have internal predecessors, (857), 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 13:11:25,823 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 13:11:25,823 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 13:11:25,832 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-12-12 13:11:26,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 13:11:26,028 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 13:11:26,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 13:11:26,029 INFO L85 PathProgramCache]: Analyzing trace with hash 431346121, now seen corresponding path program 5 times [2022-12-12 13:11:26,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 13:11:26,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975045166] [2022-12-12 13:11:26,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 13:11:26,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 13:11:26,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 13:11:27,493 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 13:11:27,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 13:11:27,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975045166] [2022-12-12 13:11:27,494 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975045166] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 13:11:27,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1155145275] [2022-12-12 13:11:27,494 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-12 13:11:27,494 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 13:11:27,494 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 13:11:27,497 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 13:11:27,499 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 13:11:27,590 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-12-12 13:11:27,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 13:11:27,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 38 conjunts are in the unsatisfiable core [2022-12-12 13:11:27,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 13:11:29,289 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 13:11:29,289 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 13:11:35,667 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 13:11:35,667 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1155145275] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 13:11:35,667 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 13:11:35,668 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 22, 22] total 51 [2022-12-12 13:11:35,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600325785] [2022-12-12 13:11:35,668 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 13:11:35,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-12-12 13:11:35,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 13:11:35,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-12-12 13:11:35,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=390, Invalid=2159, Unknown=1, NotChecked=0, Total=2550 [2022-12-12 13:11:35,670 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 42 out of 81 [2022-12-12 13:11:35,672 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 730 places, 15501 transitions, 277772 flow. Second operand has 51 states, 51 states have (on average 43.92156862745098) internal successors, (2240), 51 states have internal predecessors, (2240), 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 13:11:35,672 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 13:11:35,672 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 42 of 81 [2022-12-12 13:11:35,672 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 13:13:25,272 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.58s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-12 13:15:08,901 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse4 (* (div c_~m~0 4294967296) 4294967296))) (let ((.cse0 (let ((.cse7 (* (div (+ c_~S~0 c_~T~0) 4294967296) 4294967296)) (.cse6 (+ c_~S~0 c_~T~0 .cse4))) (and (< .cse6 (+ c_~m~0 .cse7 1)) (<= (+ c_~m~0 .cse7) .cse6)))) (.cse1 (* (div (+ c_~S~0 (- 4294967294)) 4294967296) 4294967296)) (.cse3 (* (div (+ (- 8589934590) c_~S~0) 4294967296) 4294967296))) (and (or .cse0 (not (<= (mod c_thread2Thread1of1ForFork1_~cond~1 256) 0))) (or .cse0 (and (<= 1 c_thread1Thread1of1ForFork0_~cond~0) (<= (div c_thread1Thread1of1ForFork0_~cond~0 256) 0))) (or (let ((.cse2 (+ c_~S~0 .cse4))) (and (< (+ c_~m~0 .cse1 4294967293) .cse2) (< .cse2 (+ c_~m~0 .cse3 8589934591)))) (< 0 (mod (+ c_~s~0 2) 4294967296))) (or .cse0 (< 0 (mod c_~t~0 4294967296)) (< 0 (mod c_~s~0 4294967296))) (or (< 0 (mod (+ c_~s~0 1) 4294967296)) (let ((.cse5 (+ c_~S~0 (* (div (+ c_~m~0 1) 4294967296) 4294967296)))) (and (< (+ c_~m~0 4294967294 .cse1) .cse5) (< .cse5 (+ c_~m~0 8589934592 .cse3)))))))) is different from false [2022-12-12 13:16:23,094 INFO L130 PetriNetUnfolder]: 14046/41477 cut-off events. [2022-12-12 13:16:23,095 INFO L131 PetriNetUnfolder]: For 126948/135575 co-relation queries the response was YES. [2022-12-12 13:16:23,163 INFO L83 FinitePrefix]: Finished finitePrefix Result has 330834 conditions, 41477 events. 14046/41477 cut-off events. For 126948/135575 co-relation queries the response was YES. Maximal size of possible extension queue 2760. Compared 568474 event pairs, 59 based on Foata normal form. 1073/39499 useless extension candidates. Maximal degree in co-relation 211877. Up to 15201 conditions per place. [2022-12-12 13:16:23,344 INFO L137 encePairwiseOnDemand]: 55/81 looper letters, 7628 selfloop transitions, 10154 changer transitions 6490/24305 dead transitions. [2022-12-12 13:16:23,344 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1060 places, 24305 transitions, 494500 flow [2022-12-12 13:16:23,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 331 states. [2022-12-12 13:16:23,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 331 states. [2022-12-12 13:16:23,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 15066 transitions. [2022-12-12 13:16:23,355 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.5619335347432024 [2022-12-12 13:16:23,355 INFO L295 CegarLoopForPetriNet]: 72 programPoint places, 988 predicate places. [2022-12-12 13:16:23,355 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1060 places, 24305 transitions, 494500 flow [2022-12-12 13:16:23,939 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1020 places, 24305 transitions, 483012 flow, removed 5577 selfloop flow, removed 40 redundant places. [2022-12-12 13:16:23,939 INFO L495 AbstractCegarLoop]: Abstraction has has 1020 places, 24305 transitions, 483012 flow [2022-12-12 13:16:23,940 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 43.92156862745098) internal successors, (2240), 51 states have internal predecessors, (2240), 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 13:16:23,940 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 13:16:23,940 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 13:16:23,948 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 13:16:24,142 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,SelfDestructingSolverStorable13 [2022-12-12 13:16:24,142 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 13:16:24,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 13:16:24,143 INFO L85 PathProgramCache]: Analyzing trace with hash -618121847, now seen corresponding path program 6 times [2022-12-12 13:16:24,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 13:16:24,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9100563] [2022-12-12 13:16:24,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 13:16:24,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 13:16:24,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 13:16:24,578 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 13:16:24,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 13:16:24,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9100563] [2022-12-12 13:16:24,579 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9100563] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 13:16:24,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261036393] [2022-12-12 13:16:24,579 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-12 13:16:24,579 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 13:16:24,579 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 13:16:24,580 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 13:16:24,582 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 13:16:24,657 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-12-12 13:16:24,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 13:16:24,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-12 13:16:24,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 13:16:25,171 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 13:16:25,172 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 13:16:25,494 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 13:16:25,495 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [261036393] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 13:16:25,495 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 13:16:25,495 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14, 13] total 25 [2022-12-12 13:16:25,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276089169] [2022-12-12 13:16:25,495 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 13:16:25,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-12-12 13:16:25,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 13:16:25,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-12-12 13:16:25,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=505, Unknown=0, NotChecked=0, Total=600 [2022-12-12 13:16:25,496 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 81 [2022-12-12 13:16:25,497 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1020 places, 24305 transitions, 483012 flow. Second operand has 25 states, 25 states have (on average 47.6) internal successors, (1190), 25 states have internal predecessors, (1190), 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 13:16:25,497 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 13:16:25,497 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 81 [2022-12-12 13:16:25,497 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 13:19:36,069 INFO L130 PetriNetUnfolder]: 17941/51921 cut-off events. [2022-12-12 13:19:36,069 INFO L131 PetriNetUnfolder]: For 167461/177136 co-relation queries the response was YES. [2022-12-12 13:19:36,208 INFO L83 FinitePrefix]: Finished finitePrefix Result has 456417 conditions, 51921 events. 17941/51921 cut-off events. For 167461/177136 co-relation queries the response was YES. Maximal size of possible extension queue 3147. Compared 719945 event pairs, 64 based on Foata normal form. 1094/49322 useless extension candidates. Maximal degree in co-relation 361975. Up to 18918 conditions per place. [2022-12-12 13:19:36,512 INFO L137 encePairwiseOnDemand]: 63/81 looper letters, 13890 selfloop transitions, 10458 changer transitions 6793/31177 dead transitions. [2022-12-12 13:19:36,513 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1089 places, 31177 transitions, 693351 flow [2022-12-12 13:19:36,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-12-12 13:19:36,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2022-12-12 13:19:36,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 4215 transitions. [2022-12-12 13:19:36,515 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.6194885361552028 [2022-12-12 13:19:36,516 INFO L295 CegarLoopForPetriNet]: 72 programPoint places, 1017 predicate places. [2022-12-12 13:19:36,516 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1089 places, 31177 transitions, 693351 flow [2022-12-12 13:19:37,557 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1069 places, 31177 transitions, 681104 flow, removed 5985 selfloop flow, removed 20 redundant places. [2022-12-12 13:19:37,557 INFO L495 AbstractCegarLoop]: Abstraction has has 1069 places, 31177 transitions, 681104 flow [2022-12-12 13:19:37,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 47.6) internal successors, (1190), 25 states have internal predecessors, (1190), 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 13:19:37,557 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 13:19:37,558 INFO L214 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:19:37,563 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-12-12 13:19:37,762 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,SelfDestructingSolverStorable14 [2022-12-12 13:19:37,763 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 13:19:37,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 13:19:37,763 INFO L85 PathProgramCache]: Analyzing trace with hash -200946168, now seen corresponding path program 7 times [2022-12-12 13:19:37,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 13:19:37,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561291970] [2022-12-12 13:19:37,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 13:19:37,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 13:19:37,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 13:19:39,812 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 13:19:39,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 13:19:39,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561291970] [2022-12-12 13:19:39,813 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561291970] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 13:19:39,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252094776] [2022-12-12 13:19:39,813 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-12 13:19:39,813 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 13:19:39,813 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 13:19:39,814 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 13:19:39,816 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 13:19:39,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 13:19:39,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 33 conjunts are in the unsatisfiable core [2022-12-12 13:19:39,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 13:19:41,829 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 13:19:41,830 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 13:19:44,417 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 13:19:44,417 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1252094776] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 13:19:44,417 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 13:19:44,417 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 21, 20] total 47 [2022-12-12 13:19:44,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579849797] [2022-12-12 13:19:44,417 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 13:19:44,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-12-12 13:19:44,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 13:19:44,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-12-12 13:19:44,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=355, Invalid=1807, Unknown=0, NotChecked=0, Total=2162 [2022-12-12 13:19:44,435 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 81 [2022-12-12 13:19:44,437 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1069 places, 31177 transitions, 681104 flow. Second operand has 47 states, 47 states have (on average 46.06382978723404) internal successors, (2165), 47 states have internal predecessors, (2165), 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 13:19:44,437 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 13:19:44,437 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 81 [2022-12-12 13:19:44,437 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Received shutdown request... [2022-12-12 13:20:25,102 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-12-12 13:20:25,102 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-12-12 13:20:25,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-12-12 13:20:25,113 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2022-12-12 13:20:25,120 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-12-12 13:20:25,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-12-12 13:20:25,318 WARN L619 AbstractCegarLoop]: Verification canceled: while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (47states, 44/81 universal loopers) in iteration 16,while PetriNetUnfolder was constructing finite prefix that currently has 25586 conditions, 2648 events (892/2647 cut-off events. For 9468/9687 co-relation queries the response was YES. Maximal size of possible extension queue 774. Compared 28628 event pairs, 0 based on Foata normal form. 38/3235 useless extension candidates. Maximal degree in co-relation 16829. Up to 682 conditions per place.). [2022-12-12 13:20:25,320 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2022-12-12 13:20:25,320 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2022-12-12 13:20:25,321 INFO L445 BasicCegarLoop]: Path program histogram: [8, 7, 1] [2022-12-12 13:20:25,325 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-12-12 13:20:25,325 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-12-12 13:20:25,356 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.12 01:20:25 BasicIcfg [2022-12-12 13:20:25,356 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-12-12 13:20:25,356 INFO L158 Benchmark]: Toolchain (without parser) took 851423.87ms. Allocated memory was 198.2MB in the beginning and 2.0GB in the end (delta: 1.8GB). Free memory was 174.6MB in the beginning and 897.4MB in the end (delta: -722.8MB). Peak memory consumption was 1.7GB. Max. memory is 8.0GB. [2022-12-12 13:20:25,357 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 198.2MB. Free memory was 174.0MB in the beginning and 173.8MB in the end (delta: 152.2kB). There was no memory consumed. Max. memory is 8.0GB. [2022-12-12 13:20:25,357 INFO L158 Benchmark]: CACSL2BoogieTranslator took 228.40ms. Allocated memory is still 198.2MB. Free memory was 174.6MB in the beginning and 161.8MB in the end (delta: 12.7MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. [2022-12-12 13:20:25,357 INFO L158 Benchmark]: Boogie Procedure Inliner took 32.53ms. Allocated memory is still 198.2MB. Free memory was 161.8MB in the beginning and 160.3MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-12-12 13:20:25,357 INFO L158 Benchmark]: Boogie Preprocessor took 26.23ms. Allocated memory is still 198.2MB. Free memory was 160.3MB in the beginning and 158.7MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-12-12 13:20:25,358 INFO L158 Benchmark]: RCFGBuilder took 358.96ms. Allocated memory is still 198.2MB. Free memory was 158.7MB in the beginning and 143.0MB in the end (delta: 15.7MB). Peak memory consumption was 15.7MB. Max. memory is 8.0GB. [2022-12-12 13:20:25,358 INFO L158 Benchmark]: TraceAbstraction took 850772.96ms. Allocated memory was 198.2MB in the beginning and 2.0GB in the end (delta: 1.8GB). Free memory was 141.9MB in the beginning and 897.4MB in the end (delta: -755.4MB). Peak memory consumption was 1.7GB. Max. memory is 8.0GB. [2022-12-12 13:20:25,359 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 198.2MB. Free memory was 174.0MB in the beginning and 173.8MB in the end (delta: 152.2kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 228.40ms. Allocated memory is still 198.2MB. Free memory was 174.6MB in the beginning and 161.8MB in the end (delta: 12.7MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 32.53ms. Allocated memory is still 198.2MB. Free memory was 161.8MB in the beginning and 160.3MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 26.23ms. Allocated memory is still 198.2MB. Free memory was 160.3MB in the beginning and 158.7MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 358.96ms. Allocated memory is still 198.2MB. Free memory was 158.7MB in the beginning and 143.0MB in the end (delta: 15.7MB). Peak memory consumption was 15.7MB. Max. memory is 8.0GB. * TraceAbstraction took 850772.96ms. Allocated memory was 198.2MB in the beginning and 2.0GB in the end (delta: 1.8GB). Free memory was 141.9MB in the beginning and 897.4MB in the end (delta: -755.4MB). Peak memory consumption was 1.7GB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 95]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (47states, 44/81 universal loopers) in iteration 16,while PetriNetUnfolder was constructing finite prefix that currently has 25586 conditions, 2648 events (892/2647 cut-off events. For 9468/9687 co-relation queries the response was YES. Maximal size of possible extension queue 774. Compared 28628 event pairs, 0 based on Foata normal form. 38/3235 useless extension candidates. Maximal degree in co-relation 16829. Up to 682 conditions per place.). - TimeoutResultAtElement [Line: 89]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (47states, 44/81 universal loopers) in iteration 16,while PetriNetUnfolder was constructing finite prefix that currently has 25586 conditions, 2648 events (892/2647 cut-off events. For 9468/9687 co-relation queries the response was YES. Maximal size of possible extension queue 774. Compared 28628 event pairs, 0 based on Foata normal form. 38/3235 useless extension candidates. Maximal degree in co-relation 16829. Up to 682 conditions per place.). - TimeoutResultAtElement [Line: 90]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (47states, 44/81 universal loopers) in iteration 16,while PetriNetUnfolder was constructing finite prefix that currently has 25586 conditions, 2648 events (892/2647 cut-off events. For 9468/9687 co-relation queries the response was YES. Maximal size of possible extension queue 774. Compared 28628 event pairs, 0 based on Foata normal form. 38/3235 useless extension candidates. Maximal degree in co-relation 16829. Up to 682 conditions per place.). - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 93 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 2.9s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 850.7s, OverallIterations: 16, TraceHistogramMax: 4, PathProgramHistogramMax: 8, EmptinessCheckTime: 0.0s, AutomataDifference: 803.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 7818 SdHoareTripleChecker+Valid, 64.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 7818 mSDsluCounter, 4304 SdHoareTripleChecker+Invalid, 61.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 85 IncrementalHoareTripleChecker+Unchecked, 3915 mSDsCounter, 1460 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 19642 IncrementalHoareTripleChecker+Invalid, 21187 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1460 mSolverCounterUnsat, 389 mSDtfsCounter, 19642 mSolverCounterSat, 0.2s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2653 GetRequests, 1159 SyntacticMatches, 21 SemanticMatches, 1473 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 118991 ImplicationChecksByTransitivity, 371.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=681104occurred in iteration=15, InterpolantAutomatonStates: 1244, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 2.9s AutomataMinimizationTime, 15 MinimizatonAttempts, 47312 StatesRemovedByMinimization, 15 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 1.1s SatisfiabilityAnalysisTime, 40.3s InterpolantComputationTime, 1750 NumberOfCodeBlocks, 1750 NumberOfCodeBlocksAsserted, 36 NumberOfCheckSat, 2344 ConstructedInterpolants, 22 QuantifiedInterpolants, 48151 SizeOfPredicates, 140 NumberOfNonLiveVariables, 1623 ConjunctsInSsa, 270 ConjunctsInUnsatCore, 35 InterpolantComputations, 7 PerfectInterpolantSequences, 27/298 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown