/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe.epf --traceabstraction.use.on-demand.petri.net.difference true --traceabstraction.size.reduction.to.apply.after.petri.net.difference REMOVE_DEAD -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/popl20-more-multiply-verify.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.repeated-lipton-a802222-m [2022-12-12 23:25:27,444 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-12 23:25:27,447 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-12 23:25:27,496 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-12 23:25:27,498 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-12 23:25:27,501 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-12 23:25:27,504 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-12 23:25:27,507 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-12 23:25:27,511 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-12 23:25:27,515 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-12 23:25:27,516 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-12 23:25:27,518 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-12 23:25:27,518 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-12 23:25:27,520 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-12 23:25:27,521 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-12 23:25:27,524 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-12 23:25:27,525 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-12 23:25:27,525 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-12 23:25:27,528 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-12 23:25:27,532 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-12 23:25:27,533 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-12 23:25:27,534 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-12 23:25:27,535 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-12 23:25:27,536 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-12 23:25:27,542 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-12 23:25:27,543 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-12 23:25:27,543 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-12 23:25:27,545 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-12 23:25:27,545 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-12 23:25:27,546 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-12 23:25:27,546 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-12 23:25:27,552 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-12 23:25:27,553 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-12 23:25:27,554 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-12 23:25:27,554 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-12 23:25:27,555 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-12 23:25:27,555 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-12 23:25:27,555 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-12 23:25:27,556 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-12 23:25:27,557 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-12 23:25:27,557 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-12 23:25:27,558 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe.epf [2022-12-12 23:25:27,588 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-12 23:25:27,589 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-12 23:25:27,590 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-12 23:25:27,590 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-12 23:25:27,591 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-12 23:25:27,592 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-12 23:25:27,592 INFO L138 SettingsManager]: * Use SBE=true [2022-12-12 23:25:27,592 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-12 23:25:27,592 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-12 23:25:27,592 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-12 23:25:27,593 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-12 23:25:27,593 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-12 23:25:27,594 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-12 23:25:27,594 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-12 23:25:27,594 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-12 23:25:27,594 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-12 23:25:27,594 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-12 23:25:27,594 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-12 23:25:27,594 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-12 23:25:27,595 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-12 23:25:27,595 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-12 23:25:27,595 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-12-12 23:25:27,595 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-12 23:25:27,595 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-12 23:25:27,596 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-12 23:25:27,596 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-12 23:25:27,596 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-12 23:25:27,596 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-12 23:25:27,596 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-12 23:25:27,596 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-12 23:25:27,596 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use on-demand Petri net difference -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Size reduction to apply after Petri net difference -> REMOVE_DEAD [2022-12-12 23:25:27,929 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-12 23:25:27,954 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-12 23:25:27,956 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-12 23:25:27,957 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-12 23:25:27,958 INFO L275 PluginConnector]: CDTParser initialized [2022-12-12 23:25:27,959 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-more-multiply-verify.wvr.c [2022-12-12 23:25:29,061 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-12 23:25:29,234 INFO L351 CDTParser]: Found 1 translation units. [2022-12-12 23:25:29,235 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-multiply-verify.wvr.c [2022-12-12 23:25:29,246 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/119bd6a01/d467487a31334eafb9a93d4d076d030c/FLAGce2eb41d7 [2022-12-12 23:25:29,267 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/119bd6a01/d467487a31334eafb9a93d4d076d030c [2022-12-12 23:25:29,269 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-12 23:25:29,270 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-12-12 23:25:29,273 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-12 23:25:29,273 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-12 23:25:29,276 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-12 23:25:29,276 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.12 11:25:29" (1/1) ... [2022-12-12 23:25:29,277 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@42ddddd5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 11:25:29, skipping insertion in model container [2022-12-12 23:25:29,277 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.12 11:25:29" (1/1) ... [2022-12-12 23:25:29,283 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-12 23:25:29,308 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-12 23:25:29,445 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-12 23:25:29,446 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-12 23:25:29,448 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-12 23:25:29,450 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-12 23:25:29,455 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-12 23:25:29,456 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-12 23:25:29,456 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-12 23:25:29,463 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-12 23:25:29,464 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-12 23:25:29,466 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-12 23:25:29,480 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-more-multiply-verify.wvr.c[3042,3055] [2022-12-12 23:25:29,498 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-12 23:25:29,508 INFO L203 MainTranslator]: Completed pre-run [2022-12-12 23:25:29,526 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-12 23:25:29,526 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-12 23:25:29,527 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-12 23:25:29,529 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-12 23:25:29,531 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-12 23:25:29,532 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-12 23:25:29,532 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-12 23:25:29,538 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-12 23:25:29,539 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-12 23:25:29,541 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-12 23:25:29,549 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-more-multiply-verify.wvr.c[3042,3055] [2022-12-12 23:25:29,558 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-12 23:25:29,571 INFO L208 MainTranslator]: Completed translation [2022-12-12 23:25:29,572 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 11:25:29 WrapperNode [2022-12-12 23:25:29,572 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-12 23:25:29,574 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-12 23:25:29,574 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-12 23:25:29,574 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-12 23:25:29,580 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 11:25:29" (1/1) ... [2022-12-12 23:25:29,600 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 11:25:29" (1/1) ... [2022-12-12 23:25:29,635 INFO L138 Inliner]: procedures = 26, calls = 50, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 179 [2022-12-12 23:25:29,636 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-12 23:25:29,637 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-12 23:25:29,637 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-12 23:25:29,637 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-12 23:25:29,645 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 11:25:29" (1/1) ... [2022-12-12 23:25:29,645 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 11:25:29" (1/1) ... [2022-12-12 23:25:29,658 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 11:25:29" (1/1) ... [2022-12-12 23:25:29,659 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 11:25:29" (1/1) ... [2022-12-12 23:25:29,667 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 11:25:29" (1/1) ... [2022-12-12 23:25:29,676 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 11:25:29" (1/1) ... [2022-12-12 23:25:29,678 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 11:25:29" (1/1) ... [2022-12-12 23:25:29,679 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 11:25:29" (1/1) ... [2022-12-12 23:25:29,681 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-12 23:25:29,681 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-12 23:25:29,681 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-12 23:25:29,682 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-12 23:25:29,682 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 11:25:29" (1/1) ... [2022-12-12 23:25:29,687 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-12 23:25:29,705 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:25:29,721 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 23:25:29,743 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 23:25:29,761 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-12 23:25:29,761 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-12 23:25:29,761 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-12 23:25:29,761 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-12 23:25:29,761 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-12-12 23:25:29,761 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-12-12 23:25:29,761 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-12-12 23:25:29,761 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-12-12 23:25:29,762 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-12-12 23:25:29,762 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-12-12 23:25:29,762 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-12 23:25:29,762 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-12-12 23:25:29,762 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-12-12 23:25:29,762 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-12 23:25:29,762 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-12 23:25:29,762 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-12 23:25:29,762 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-12 23:25:29,763 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 23:25:29,920 INFO L236 CfgBuilder]: Building ICFG [2022-12-12 23:25:29,922 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-12 23:25:30,209 INFO L277 CfgBuilder]: Performing block encoding [2022-12-12 23:25:30,341 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-12 23:25:30,341 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2022-12-12 23:25:30,343 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.12 11:25:30 BoogieIcfgContainer [2022-12-12 23:25:30,343 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-12 23:25:30,360 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-12 23:25:30,360 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-12 23:25:30,363 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-12 23:25:30,363 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.12 11:25:29" (1/3) ... [2022-12-12 23:25:30,365 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79bbd9d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.12 11:25:30, skipping insertion in model container [2022-12-12 23:25:30,365 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 11:25:29" (2/3) ... [2022-12-12 23:25:30,365 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79bbd9d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.12 11:25:30, skipping insertion in model container [2022-12-12 23:25:30,365 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.12 11:25:30" (3/3) ... [2022-12-12 23:25:30,366 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-multiply-verify.wvr.c [2022-12-12 23:25:30,397 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-12 23:25:30,397 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-12 23:25:30,397 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-12 23:25:30,491 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-12-12 23:25:30,522 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 145 places, 144 transitions, 312 flow [2022-12-12 23:25:30,596 INFO L130 PetriNetUnfolder]: 9/141 cut-off events. [2022-12-12 23:25:30,596 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-12-12 23:25:30,605 INFO L83 FinitePrefix]: Finished finitePrefix Result has 154 conditions, 141 events. 9/141 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 86 event pairs, 0 based on Foata normal form. 0/131 useless extension candidates. Maximal degree in co-relation 107. Up to 2 conditions per place. [2022-12-12 23:25:30,605 INFO L82 GeneralOperation]: Start removeDead. Operand has 145 places, 144 transitions, 312 flow [2022-12-12 23:25:30,609 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 132 places, 131 transitions, 280 flow [2022-12-12 23:25:30,611 INFO L203 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-12 23:25:30,625 INFO L174 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 132 places, 131 transitions, 280 flow [2022-12-12 23:25:30,629 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 132 places, 131 transitions, 280 flow [2022-12-12 23:25:30,659 INFO L130 PetriNetUnfolder]: 9/131 cut-off events. [2022-12-12 23:25:30,660 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-12-12 23:25:30,661 INFO L83 FinitePrefix]: Finished finitePrefix Result has 144 conditions, 131 events. 9/131 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 85 event pairs, 0 based on Foata normal form. 0/122 useless extension candidates. Maximal degree in co-relation 107. Up to 2 conditions per place. [2022-12-12 23:25:30,663 INFO L222 LiptonReduction]: Starting Lipton reduction on Petri net that has 132 places, 131 transitions, 280 flow [2022-12-12 23:25:30,663 INFO L226 LiptonReduction]: Number of co-enabled transitions 1464 [2022-12-12 23:25:35,308 INFO L241 LiptonReduction]: Total number of compositions: 109 [2022-12-12 23:25:35,322 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-12 23:25:35,329 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;@39963dd0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, Conditionality=CONDITIONAL_DISJUNCTIVE, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-12 23:25:35,330 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-12-12 23:25:35,344 INFO L130 PetriNetUnfolder]: 3/21 cut-off events. [2022-12-12 23:25:35,344 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-12-12 23:25:35,344 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:25:35,345 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:25:35,345 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 23:25:35,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:25:35,351 INFO L85 PathProgramCache]: Analyzing trace with hash 1581976625, now seen corresponding path program 1 times [2022-12-12 23:25:35,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:25:35,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450712449] [2022-12-12 23:25:35,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:25:35,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:25:35,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:25:35,850 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 23:25:35,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:25:35,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450712449] [2022-12-12 23:25:35,852 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450712449] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 23:25:35,852 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-12 23:25:35,852 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-12 23:25:35,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493247556] [2022-12-12 23:25:35,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 23:25:35,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-12 23:25:35,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:25:35,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-12 23:25:35,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-12 23:25:35,884 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 22 [2022-12-12 23:25:35,885 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 22 transitions, 62 flow. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 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 23:25:35,886 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:25:35,886 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 22 [2022-12-12 23:25:35,887 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:25:36,027 INFO L130 PetriNetUnfolder]: 169/271 cut-off events. [2022-12-12 23:25:36,028 INFO L131 PetriNetUnfolder]: For 20/20 co-relation queries the response was YES. [2022-12-12 23:25:36,032 INFO L83 FinitePrefix]: Finished finitePrefix Result has 596 conditions, 271 events. 169/271 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 668 event pairs, 108 based on Foata normal form. 8/235 useless extension candidates. Maximal degree in co-relation 372. Up to 217 conditions per place. [2022-12-12 23:25:36,036 INFO L137 encePairwiseOnDemand]: 16/22 looper letters, 21 selfloop transitions, 2 changer transitions 11/34 dead transitions. [2022-12-12 23:25:36,037 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 34 transitions, 163 flow [2022-12-12 23:25:36,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-12 23:25:36,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-12 23:25:36,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 37 transitions. [2022-12-12 23:25:36,048 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.42045454545454547 [2022-12-12 23:25:36,051 INFO L295 CegarLoopForPetriNet]: 29 programPoint places, 3 predicate places. [2022-12-12 23:25:36,052 INFO L82 GeneralOperation]: Start removeDead. Operand has 32 places, 34 transitions, 163 flow [2022-12-12 23:25:36,053 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 31 places, 23 transitions, 110 flow [2022-12-12 23:25:36,054 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 23 transitions, 110 flow [2022-12-12 23:25:36,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 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 23:25:36,055 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:25:36,055 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] [2022-12-12 23:25:36,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-12 23:25:36,059 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 23:25:36,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:25:36,060 INFO L85 PathProgramCache]: Analyzing trace with hash 745907714, now seen corresponding path program 1 times [2022-12-12 23:25:36,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:25:36,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106096394] [2022-12-12 23:25:36,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:25:36,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:25:36,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:25:36,331 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 23:25:36,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:25:36,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106096394] [2022-12-12 23:25:36,332 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106096394] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 23:25:36,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100663571] [2022-12-12 23:25:36,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:25:36,333 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:25:36,333 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:25:36,343 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 23:25:36,351 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 23:25:36,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:25:36,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-12 23:25:36,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 23:25:36,605 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 23:25:36,605 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 23:25:36,670 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 23:25:36,671 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2100663571] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 23:25:36,671 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 23:25:36,671 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 10 [2022-12-12 23:25:36,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340178582] [2022-12-12 23:25:36,672 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 23:25:36,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-12 23:25:36,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:25:36,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-12 23:25:36,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2022-12-12 23:25:36,673 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 22 [2022-12-12 23:25:36,673 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 23 transitions, 110 flow. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 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 23:25:36,673 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:25:36,674 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 22 [2022-12-12 23:25:36,674 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:25:36,873 INFO L130 PetriNetUnfolder]: 203/328 cut-off events. [2022-12-12 23:25:36,873 INFO L131 PetriNetUnfolder]: For 20/20 co-relation queries the response was YES. [2022-12-12 23:25:36,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1051 conditions, 328 events. 203/328 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 917 event pairs, 108 based on Foata normal form. 20/286 useless extension candidates. Maximal degree in co-relation 546. Up to 328 conditions per place. [2022-12-12 23:25:36,876 INFO L137 encePairwiseOnDemand]: 16/22 looper letters, 21 selfloop transitions, 3 changer transitions 24/48 dead transitions. [2022-12-12 23:25:36,876 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 48 transitions, 324 flow [2022-12-12 23:25:36,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-12 23:25:36,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-12 23:25:36,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 52 transitions. [2022-12-12 23:25:36,878 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.3939393939393939 [2022-12-12 23:25:36,878 INFO L295 CegarLoopForPetriNet]: 29 programPoint places, 7 predicate places. [2022-12-12 23:25:36,878 INFO L82 GeneralOperation]: Start removeDead. Operand has 36 places, 48 transitions, 324 flow [2022-12-12 23:25:36,880 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 34 places, 24 transitions, 162 flow [2022-12-12 23:25:36,880 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 24 transitions, 162 flow [2022-12-12 23:25:36,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 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 23:25:36,880 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:25:36,881 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:25:36,894 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 23:25:37,087 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 23:25:37,088 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 23:25:37,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:25:37,089 INFO L85 PathProgramCache]: Analyzing trace with hash 14723391, now seen corresponding path program 2 times [2022-12-12 23:25:37,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:25:37,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151548574] [2022-12-12 23:25:37,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:25:37,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:25:37,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:25:38,883 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 23:25:38,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:25:38,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151548574] [2022-12-12 23:25:38,884 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151548574] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 23:25:38,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818903864] [2022-12-12 23:25:38,884 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-12 23:25:38,884 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:25:38,884 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:25:38,886 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 23:25:38,912 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 23:25:39,037 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-12-12 23:25:39,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 23:25:39,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 39 conjunts are in the unsatisfiable core [2022-12-12 23:25:39,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 23:25:39,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-12 23:25:39,228 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2022-12-12 23:25:39,352 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 23:25:39,352 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 89 treesize of output 35 [2022-12-12 23:25:39,379 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 23:25:39,379 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-12 23:25:39,379 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1818903864] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 23:25:39,379 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-12 23:25:39,380 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10] total 18 [2022-12-12 23:25:39,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127442563] [2022-12-12 23:25:39,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 23:25:39,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-12 23:25:39,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:25:39,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-12 23:25:39,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2022-12-12 23:25:39,382 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 22 [2022-12-12 23:25:39,383 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 24 transitions, 162 flow. Second operand has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 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 23:25:39,383 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:25:39,383 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 22 [2022-12-12 23:25:39,383 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:25:39,686 INFO L130 PetriNetUnfolder]: 169/288 cut-off events. [2022-12-12 23:25:39,686 INFO L131 PetriNetUnfolder]: For 45/45 co-relation queries the response was YES. [2022-12-12 23:25:39,687 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1218 conditions, 288 events. 169/288 cut-off events. For 45/45 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 863 event pairs, 32 based on Foata normal form. 25/252 useless extension candidates. Maximal degree in co-relation 900. Up to 288 conditions per place. [2022-12-12 23:25:39,689 INFO L137 encePairwiseOnDemand]: 11/22 looper letters, 50 selfloop transitions, 13 changer transitions 13/76 dead transitions. [2022-12-12 23:25:39,689 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 76 transitions, 671 flow [2022-12-12 23:25:39,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-12 23:25:39,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-12 23:25:39,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 79 transitions. [2022-12-12 23:25:39,692 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.44886363636363635 [2022-12-12 23:25:39,693 INFO L295 CegarLoopForPetriNet]: 29 programPoint places, 12 predicate places. [2022-12-12 23:25:39,693 INFO L82 GeneralOperation]: Start removeDead. Operand has 41 places, 76 transitions, 671 flow [2022-12-12 23:25:39,695 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 40 places, 63 transitions, 549 flow [2022-12-12 23:25:39,695 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 63 transitions, 549 flow [2022-12-12 23:25:39,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 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 23:25:39,696 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:25:39,696 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:25:39,704 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-12 23:25:39,902 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,SelfDestructingSolverStorable2 [2022-12-12 23:25:39,902 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 23:25:39,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:25:39,903 INFO L85 PathProgramCache]: Analyzing trace with hash -572530217, now seen corresponding path program 3 times [2022-12-12 23:25:39,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:25:39,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949686232] [2022-12-12 23:25:39,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:25:39,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:25:39,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:25:41,784 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 23:25:41,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:25:41,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949686232] [2022-12-12 23:25:41,785 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949686232] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 23:25:41,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553491371] [2022-12-12 23:25:41,785 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-12 23:25:41,785 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:25:41,788 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:25:41,790 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 23:25:41,792 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 23:25:41,958 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-12-12 23:25:41,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 23:25:41,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 31 conjunts are in the unsatisfiable core [2022-12-12 23:25:41,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 23:25:41,997 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-12 23:25:42,164 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 23:25:42,164 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 86 treesize of output 35 [2022-12-12 23:25:42,192 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 23:25:42,192 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-12 23:25:42,192 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [553491371] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 23:25:42,192 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-12 23:25:42,192 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [11] total 17 [2022-12-12 23:25:42,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964850893] [2022-12-12 23:25:42,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 23:25:42,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-12 23:25:42,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:25:42,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-12 23:25:42,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2022-12-12 23:25:42,194 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 22 [2022-12-12 23:25:42,194 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 63 transitions, 549 flow. Second operand has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 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 23:25:42,194 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:25:42,194 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 22 [2022-12-12 23:25:42,195 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:25:42,469 INFO L130 PetriNetUnfolder]: 241/396 cut-off events. [2022-12-12 23:25:42,470 INFO L131 PetriNetUnfolder]: For 43/43 co-relation queries the response was YES. [2022-12-12 23:25:42,470 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2062 conditions, 396 events. 241/396 cut-off events. For 43/43 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1292 event pairs, 37 based on Foata normal form. 5/302 useless extension candidates. Maximal degree in co-relation 1639. Up to 396 conditions per place. [2022-12-12 23:25:42,473 INFO L137 encePairwiseOnDemand]: 12/22 looper letters, 75 selfloop transitions, 24 changer transitions 13/112 dead transitions. [2022-12-12 23:25:42,473 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 112 transitions, 1201 flow [2022-12-12 23:25:42,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-12 23:25:42,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-12 23:25:42,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 74 transitions. [2022-12-12 23:25:42,476 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.42045454545454547 [2022-12-12 23:25:42,477 INFO L295 CegarLoopForPetriNet]: 29 programPoint places, 18 predicate places. [2022-12-12 23:25:42,477 INFO L82 GeneralOperation]: Start removeDead. Operand has 47 places, 112 transitions, 1201 flow [2022-12-12 23:25:42,481 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 46 places, 99 transitions, 1053 flow [2022-12-12 23:25:42,482 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 99 transitions, 1053 flow [2022-12-12 23:25:42,482 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 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 23:25:42,482 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:25:42,482 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:25:42,491 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 23:25:42,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:25:42,689 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 23:25:42,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:25:42,689 INFO L85 PathProgramCache]: Analyzing trace with hash -372827165, now seen corresponding path program 4 times [2022-12-12 23:25:42,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:25:42,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805473951] [2022-12-12 23:25:42,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:25:42,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:25:42,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:25:44,560 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 23:25:44,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:25:44,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805473951] [2022-12-12 23:25:44,561 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805473951] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 23:25:44,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [199032557] [2022-12-12 23:25:44,561 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-12 23:25:44,561 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:25:44,562 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:25:44,563 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 23:25:44,565 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 23:25:44,664 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-12 23:25:44,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 23:25:44,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 54 conjunts are in the unsatisfiable core [2022-12-12 23:25:44,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 23:25:45,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-12 23:25:45,085 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 34 [2022-12-12 23:25:45,171 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 23:25:45,172 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 83 treesize of output 35 [2022-12-12 23:25:45,207 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 23:25:45,207 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 23:25:45,561 INFO L321 Elim1Store]: treesize reduction 23, result has 14.8 percent of original size [2022-12-12 23:25:45,562 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 85 treesize of output 55 [2022-12-12 23:25:45,568 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 23:25:45,568 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 7 [2022-12-12 23:25:45,837 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 23:25:45,837 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [199032557] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 23:25:45,838 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 23:25:45,838 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 31 [2022-12-12 23:25:45,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241249677] [2022-12-12 23:25:45,838 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 23:25:45,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-12-12 23:25:45,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:25:45,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-12-12 23:25:45,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=868, Unknown=1, NotChecked=0, Total=1056 [2022-12-12 23:25:45,840 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 22 [2022-12-12 23:25:45,840 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 99 transitions, 1053 flow. Second operand has 33 states, 32 states have (on average 1.96875) internal successors, (63), 32 states have internal predecessors, (63), 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 23:25:45,840 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:25:45,840 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 22 [2022-12-12 23:25:45,840 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:25:54,167 INFO L130 PetriNetUnfolder]: 871/1526 cut-off events. [2022-12-12 23:25:54,167 INFO L131 PetriNetUnfolder]: For 223/223 co-relation queries the response was YES. [2022-12-12 23:25:54,169 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9464 conditions, 1526 events. 871/1526 cut-off events. For 223/223 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 7920 event pairs, 61 based on Foata normal form. 20/1175 useless extension candidates. Maximal degree in co-relation 3456. Up to 1526 conditions per place. [2022-12-12 23:25:54,178 INFO L137 encePairwiseOnDemand]: 9/22 looper letters, 330 selfloop transitions, 106 changer transitions 112/548 dead transitions. [2022-12-12 23:25:54,179 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 548 transitions, 6996 flow [2022-12-12 23:25:54,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-12-12 23:25:54,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2022-12-12 23:25:54,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 382 transitions. [2022-12-12 23:25:54,182 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.32154882154882153 [2022-12-12 23:25:54,184 INFO L295 CegarLoopForPetriNet]: 29 programPoint places, 70 predicate places. [2022-12-12 23:25:54,184 INFO L82 GeneralOperation]: Start removeDead. Operand has 99 places, 548 transitions, 6996 flow [2022-12-12 23:25:54,197 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 81 places, 436 transitions, 5553 flow [2022-12-12 23:25:54,198 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 436 transitions, 5553 flow [2022-12-12 23:25:54,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 1.96875) internal successors, (63), 32 states have internal predecessors, (63), 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 23:25:54,199 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:25:54,200 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:25:54,207 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 23:25:54,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:25:54,406 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 23:25:54,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:25:54,407 INFO L85 PathProgramCache]: Analyzing trace with hash 931890339, now seen corresponding path program 5 times [2022-12-12 23:25:54,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:25:54,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947335275] [2022-12-12 23:25:54,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:25:54,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:25:54,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:25:56,271 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 23:25:56,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:25:56,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947335275] [2022-12-12 23:25:56,271 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947335275] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 23:25:56,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891160037] [2022-12-12 23:25:56,272 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-12 23:25:56,272 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:25:56,272 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:25:56,276 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 23:25:56,303 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 23:25:56,403 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-12 23:25:56,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 23:25:56,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 41 conjunts are in the unsatisfiable core [2022-12-12 23:25:56,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 23:25:56,753 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 23:25:56,754 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 77 treesize of output 35 [2022-12-12 23:25:56,780 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 23:25:56,780 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 23:25:56,942 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 23:25:56,942 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 58 treesize of output 76 [2022-12-12 23:25:58,005 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 23:25:58,005 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1891160037] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 23:25:58,006 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 23:25:58,006 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 29 [2022-12-12 23:25:58,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175667350] [2022-12-12 23:25:58,006 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 23:25:58,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-12-12 23:25:58,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:25:58,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-12-12 23:25:58,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=777, Unknown=0, NotChecked=0, Total=930 [2022-12-12 23:25:58,008 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 22 [2022-12-12 23:25:58,008 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 436 transitions, 5553 flow. Second operand has 31 states, 30 states have (on average 2.1) internal successors, (63), 30 states have internal predecessors, (63), 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 23:25:58,008 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:25:58,008 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 22 [2022-12-12 23:25:58,008 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:26:02,012 INFO L130 PetriNetUnfolder]: 975/1684 cut-off events. [2022-12-12 23:26:02,012 INFO L131 PetriNetUnfolder]: For 260/260 co-relation queries the response was YES. [2022-12-12 23:26:02,014 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12151 conditions, 1684 events. 975/1684 cut-off events. For 260/260 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 8832 event pairs, 65 based on Foata normal form. 2/1291 useless extension candidates. Maximal degree in co-relation 4197. Up to 1684 conditions per place. [2022-12-12 23:26:02,025 INFO L137 encePairwiseOnDemand]: 8/22 looper letters, 434 selfloop transitions, 151 changer transitions 27/612 dead transitions. [2022-12-12 23:26:02,025 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 612 transitions, 9060 flow [2022-12-12 23:26:02,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-12 23:26:02,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-12-12 23:26:02,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 205 transitions. [2022-12-12 23:26:02,027 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.38825757575757575 [2022-12-12 23:26:02,028 INFO L295 CegarLoopForPetriNet]: 29 programPoint places, 75 predicate places. [2022-12-12 23:26:02,028 INFO L82 GeneralOperation]: Start removeDead. Operand has 104 places, 612 transitions, 9060 flow [2022-12-12 23:26:02,044 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 102 places, 585 transitions, 8646 flow [2022-12-12 23:26:02,044 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 585 transitions, 8646 flow [2022-12-12 23:26:02,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.1) internal successors, (63), 30 states have internal predecessors, (63), 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 23:26:02,045 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:26:02,045 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:26:02,051 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 23:26:02,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:26:02,251 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 23:26:02,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:26:02,252 INFO L85 PathProgramCache]: Analyzing trace with hash -1697856245, now seen corresponding path program 6 times [2022-12-12 23:26:02,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:26:02,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687025656] [2022-12-12 23:26:02,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:26:02,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:26:02,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:26:03,248 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 23:26:03,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:26:03,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687025656] [2022-12-12 23:26:03,248 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687025656] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 23:26:03,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195358460] [2022-12-12 23:26:03,249 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-12 23:26:03,249 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:26:03,249 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:26:03,250 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 23:26:03,251 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 23:26:03,384 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2022-12-12 23:26:03,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 23:26:03,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 25 conjunts are in the unsatisfiable core [2022-12-12 23:26:03,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 23:26:03,532 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 23:26:03,533 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 86 treesize of output 35 [2022-12-12 23:26:03,556 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 23:26:03,556 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-12 23:26:03,557 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1195358460] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 23:26:03,557 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-12 23:26:03,557 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 16 [2022-12-12 23:26:03,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826374764] [2022-12-12 23:26:03,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 23:26:03,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-12 23:26:03,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:26:03,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-12 23:26:03,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2022-12-12 23:26:03,558 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 22 [2022-12-12 23:26:03,558 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 585 transitions, 8646 flow. Second operand has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 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 23:26:03,558 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:26:03,559 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 22 [2022-12-12 23:26:03,559 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:26:04,025 INFO L130 PetriNetUnfolder]: 1018/1765 cut-off events. [2022-12-12 23:26:04,026 INFO L131 PetriNetUnfolder]: For 272/272 co-relation queries the response was YES. [2022-12-12 23:26:04,028 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14499 conditions, 1765 events. 1018/1765 cut-off events. For 272/272 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 9460 event pairs, 65 based on Foata normal form. 2/1347 useless extension candidates. Maximal degree in co-relation 4966. Up to 1765 conditions per place. [2022-12-12 23:26:04,044 INFO L137 encePairwiseOnDemand]: 12/22 looper letters, 546 selfloop transitions, 77 changer transitions 26/649 dead transitions. [2022-12-12 23:26:04,045 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 649 transitions, 10903 flow [2022-12-12 23:26:04,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-12 23:26:04,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-12 23:26:04,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 74 transitions. [2022-12-12 23:26:04,046 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.42045454545454547 [2022-12-12 23:26:04,046 INFO L295 CegarLoopForPetriNet]: 29 programPoint places, 80 predicate places. [2022-12-12 23:26:04,046 INFO L82 GeneralOperation]: Start removeDead. Operand has 109 places, 649 transitions, 10903 flow [2022-12-12 23:26:04,081 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 108 places, 623 transitions, 10451 flow [2022-12-12 23:26:04,082 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 623 transitions, 10451 flow [2022-12-12 23:26:04,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 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 23:26:04,082 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:26:04,082 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:26:04,088 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 23:26:04,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:26:04,283 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 23:26:04,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:26:04,284 INFO L85 PathProgramCache]: Analyzing trace with hash -411329551, now seen corresponding path program 7 times [2022-12-12 23:26:04,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:26:04,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146512176] [2022-12-12 23:26:04,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:26:04,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:26:04,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:26:06,106 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 23:26:06,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:26:06,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146512176] [2022-12-12 23:26:06,106 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146512176] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 23:26:06,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405680861] [2022-12-12 23:26:06,106 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-12 23:26:06,107 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:26:06,107 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:26:06,112 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 23:26:06,115 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 23:26:06,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:26:06,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 49 conjunts are in the unsatisfiable core [2022-12-12 23:26:06,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 23:26:06,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-12 23:26:06,500 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 35 [2022-12-12 23:26:06,627 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 23:26:06,628 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 89 treesize of output 35 [2022-12-12 23:26:06,657 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 23:26:06,657 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 23:26:06,934 INFO L321 Elim1Store]: treesize reduction 44, result has 17.0 percent of original size [2022-12-12 23:26:06,934 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 87 treesize of output 61 [2022-12-12 23:26:06,946 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 23:26:06,946 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 7 [2022-12-12 23:26:07,246 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 23:26:07,247 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1405680861] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 23:26:07,247 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 23:26:07,247 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 31 [2022-12-12 23:26:07,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119231852] [2022-12-12 23:26:07,247 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 23:26:07,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-12-12 23:26:07,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:26:07,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-12-12 23:26:07,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=885, Unknown=1, NotChecked=0, Total=1056 [2022-12-12 23:26:07,249 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 22 [2022-12-12 23:26:07,250 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 623 transitions, 10451 flow. Second operand has 33 states, 32 states have (on average 1.96875) internal successors, (63), 32 states have internal predecessors, (63), 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 23:26:07,250 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:26:07,250 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 22 [2022-12-12 23:26:07,250 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:26:11,650 INFO L130 PetriNetUnfolder]: 1060/1883 cut-off events. [2022-12-12 23:26:11,650 INFO L131 PetriNetUnfolder]: For 287/287 co-relation queries the response was YES. [2022-12-12 23:26:11,652 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17359 conditions, 1883 events. 1060/1883 cut-off events. For 287/287 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 10513 event pairs, 59 based on Foata normal form. 2/1448 useless extension candidates. Maximal degree in co-relation 5915. Up to 1883 conditions per place. [2022-12-12 23:26:11,662 INFO L137 encePairwiseOnDemand]: 8/22 looper letters, 523 selfloop transitions, 164 changer transitions 38/725 dead transitions. [2022-12-12 23:26:11,663 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 725 transitions, 13644 flow [2022-12-12 23:26:11,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-12-12 23:26:11,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2022-12-12 23:26:11,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 242 transitions. [2022-12-12 23:26:11,666 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.3333333333333333 [2022-12-12 23:26:11,668 INFO L295 CegarLoopForPetriNet]: 29 programPoint places, 111 predicate places. [2022-12-12 23:26:11,668 INFO L82 GeneralOperation]: Start removeDead. Operand has 140 places, 725 transitions, 13644 flow [2022-12-12 23:26:11,685 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 134 places, 687 transitions, 12915 flow [2022-12-12 23:26:11,685 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 687 transitions, 12915 flow [2022-12-12 23:26:11,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 1.96875) internal successors, (63), 32 states have internal predecessors, (63), 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 23:26:11,688 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:26:11,688 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:26:11,696 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 23:26:11,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:26:11,897 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 23:26:11,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:26:11,897 INFO L85 PathProgramCache]: Analyzing trace with hash -1041734115, now seen corresponding path program 8 times [2022-12-12 23:26:11,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:26:11,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545879709] [2022-12-12 23:26:11,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:26:11,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:26:11,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:26:13,294 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 23:26:13,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:26:13,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545879709] [2022-12-12 23:26:13,294 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545879709] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 23:26:13,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828221746] [2022-12-12 23:26:13,294 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-12 23:26:13,295 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:26:13,295 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:26:13,300 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 23:26:13,303 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 23:26:13,448 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-12-12 23:26:13,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 23:26:13,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 32 conjunts are in the unsatisfiable core [2022-12-12 23:26:13,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 23:26:13,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-12 23:26:13,604 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 23 [2022-12-12 23:26:13,701 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 23:26:13,701 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 86 treesize of output 35 [2022-12-12 23:26:13,726 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 23:26:13,726 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-12 23:26:13,727 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [828221746] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 23:26:13,727 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-12 23:26:13,727 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [11] total 19 [2022-12-12 23:26:13,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027088774] [2022-12-12 23:26:13,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 23:26:13,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-12 23:26:13,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:26:13,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-12 23:26:13,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2022-12-12 23:26:13,728 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 22 [2022-12-12 23:26:13,728 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 687 transitions, 12915 flow. Second operand has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 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 23:26:13,728 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:26:13,728 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 22 [2022-12-12 23:26:13,729 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:26:14,374 INFO L130 PetriNetUnfolder]: 1078/1902 cut-off events. [2022-12-12 23:26:14,375 INFO L131 PetriNetUnfolder]: For 299/299 co-relation queries the response was YES. [2022-12-12 23:26:14,377 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19439 conditions, 1902 events. 1078/1902 cut-off events. For 299/299 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 10542 event pairs, 61 based on Foata normal form. 4/1464 useless extension candidates. Maximal degree in co-relation 6598. Up to 1902 conditions per place. [2022-12-12 23:26:14,389 INFO L137 encePairwiseOnDemand]: 12/22 looper letters, 633 selfloop transitions, 72 changer transitions 28/733 dead transitions. [2022-12-12 23:26:14,389 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 733 transitions, 15263 flow [2022-12-12 23:26:14,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-12 23:26:14,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-12 23:26:14,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 75 transitions. [2022-12-12 23:26:14,390 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.42613636363636365 [2022-12-12 23:26:14,392 INFO L295 CegarLoopForPetriNet]: 29 programPoint places, 112 predicate places. [2022-12-12 23:26:14,392 INFO L82 GeneralOperation]: Start removeDead. Operand has 141 places, 733 transitions, 15263 flow [2022-12-12 23:26:14,410 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 140 places, 705 transitions, 14667 flow [2022-12-12 23:26:14,410 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 705 transitions, 14667 flow [2022-12-12 23:26:14,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 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 23:26:14,410 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:26:14,410 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:26:14,426 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 23:26:14,622 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,SelfDestructingSolverStorable8 [2022-12-12 23:26:14,623 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 23:26:14,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:26:14,623 INFO L85 PathProgramCache]: Analyzing trace with hash 31569589, now seen corresponding path program 9 times [2022-12-12 23:26:14,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:26:14,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563491155] [2022-12-12 23:26:14,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:26:14,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:26:14,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:26:15,475 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 23:26:15,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:26:15,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563491155] [2022-12-12 23:26:15,475 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563491155] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 23:26:15,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [480210075] [2022-12-12 23:26:15,475 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-12 23:26:15,476 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:26:15,476 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:26:15,477 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 23:26:15,479 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 23:26:15,619 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-12-12 23:26:15,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 23:26:15,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 35 conjunts are in the unsatisfiable core [2022-12-12 23:26:15,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 23:26:15,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-12 23:26:15,823 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 34 [2022-12-12 23:26:15,887 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 23:26:15,888 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 86 treesize of output 35 [2022-12-12 23:26:15,908 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 23:26:15,909 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-12 23:26:15,909 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [480210075] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 23:26:15,909 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-12 23:26:15,909 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10] total 18 [2022-12-12 23:26:15,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423822845] [2022-12-12 23:26:15,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 23:26:15,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-12 23:26:15,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:26:15,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-12 23:26:15,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2022-12-12 23:26:15,911 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 22 [2022-12-12 23:26:15,911 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 705 transitions, 14667 flow. Second operand has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 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 23:26:15,911 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:26:15,911 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 22 [2022-12-12 23:26:15,911 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:26:16,415 INFO L130 PetriNetUnfolder]: 1068/1892 cut-off events. [2022-12-12 23:26:16,415 INFO L131 PetriNetUnfolder]: For 283/283 co-relation queries the response was YES. [2022-12-12 23:26:16,417 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21232 conditions, 1892 events. 1068/1892 cut-off events. For 283/283 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 10528 event pairs, 55 based on Foata normal form. 2/1462 useless extension candidates. Maximal degree in co-relation 7210. Up to 1892 conditions per place. [2022-12-12 23:26:16,428 INFO L137 encePairwiseOnDemand]: 13/22 looper letters, 633 selfloop transitions, 67 changer transitions 31/731 dead transitions. [2022-12-12 23:26:16,429 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 731 transitions, 16685 flow [2022-12-12 23:26:16,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-12 23:26:16,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-12 23:26:16,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 74 transitions. [2022-12-12 23:26:16,430 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.42045454545454547 [2022-12-12 23:26:16,430 INFO L295 CegarLoopForPetriNet]: 29 programPoint places, 118 predicate places. [2022-12-12 23:26:16,430 INFO L82 GeneralOperation]: Start removeDead. Operand has 147 places, 731 transitions, 16685 flow [2022-12-12 23:26:16,448 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 143 places, 700 transitions, 15967 flow [2022-12-12 23:26:16,448 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 700 transitions, 15967 flow [2022-12-12 23:26:16,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 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 23:26:16,449 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:26:16,449 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:26:16,455 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 23:26:16,655 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,SelfDestructingSolverStorable9 [2022-12-12 23:26:16,655 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 23:26:16,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:26:16,656 INFO L85 PathProgramCache]: Analyzing trace with hash -424350347, now seen corresponding path program 10 times [2022-12-12 23:26:16,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:26:16,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271048650] [2022-12-12 23:26:16,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:26:16,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:26:16,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:26:18,040 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 23:26:18,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:26:18,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271048650] [2022-12-12 23:26:18,041 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271048650] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 23:26:18,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [378530670] [2022-12-12 23:26:18,041 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-12 23:26:18,041 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:26:18,041 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:26:18,042 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 23:26:18,047 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 23:26:18,138 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-12 23:26:18,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 23:26:18,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 45 conjunts are in the unsatisfiable core [2022-12-12 23:26:18,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 23:26:18,405 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 23:26:18,406 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 89 treesize of output 35 [2022-12-12 23:26:18,430 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 23:26:18,430 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 23:26:18,620 INFO L321 Elim1Store]: treesize reduction 44, result has 17.0 percent of original size [2022-12-12 23:26:18,620 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 58 treesize of output 32 [2022-12-12 23:26:18,712 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 23:26:18,712 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [378530670] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-12 23:26:18,712 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-12 23:26:18,712 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [11, 9] total 26 [2022-12-12 23:26:18,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629632932] [2022-12-12 23:26:18,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 23:26:18,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-12 23:26:18,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:26:18,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-12 23:26:18,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=605, Unknown=0, NotChecked=0, Total=702 [2022-12-12 23:26:18,713 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 22 [2022-12-12 23:26:18,714 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 700 transitions, 15967 flow. Second operand has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 7 states have internal predecessors, (20), 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 23:26:18,714 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:26:18,714 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 22 [2022-12-12 23:26:18,714 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:26:19,657 INFO L130 PetriNetUnfolder]: 1151/2014 cut-off events. [2022-12-12 23:26:19,658 INFO L131 PetriNetUnfolder]: For 305/305 co-relation queries the response was YES. [2022-12-12 23:26:19,660 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24614 conditions, 2014 events. 1151/2014 cut-off events. For 305/305 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 11177 event pairs, 50 based on Foata normal form. 2/1561 useless extension candidates. Maximal degree in co-relation 8170. Up to 2014 conditions per place. [2022-12-12 23:26:19,669 INFO L137 encePairwiseOnDemand]: 10/22 looper letters, 572 selfloop transitions, 195 changer transitions 26/793 dead transitions. [2022-12-12 23:26:19,670 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 793 transitions, 19689 flow [2022-12-12 23:26:19,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-12 23:26:19,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-12-12 23:26:19,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 96 transitions. [2022-12-12 23:26:19,676 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.48484848484848486 [2022-12-12 23:26:19,677 INFO L295 CegarLoopForPetriNet]: 29 programPoint places, 122 predicate places. [2022-12-12 23:26:19,677 INFO L82 GeneralOperation]: Start removeDead. Operand has 151 places, 793 transitions, 19689 flow [2022-12-12 23:26:19,696 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 150 places, 767 transitions, 19029 flow [2022-12-12 23:26:19,697 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 767 transitions, 19029 flow [2022-12-12 23:26:19,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 7 states have internal predecessors, (20), 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 23:26:19,697 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:26:19,697 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:26:19,703 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 23:26:19,899 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,SelfDestructingSolverStorable10 [2022-12-12 23:26:19,899 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 23:26:19,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:26:19,900 INFO L85 PathProgramCache]: Analyzing trace with hash -1481681071, now seen corresponding path program 11 times [2022-12-12 23:26:19,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:26:19,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507949050] [2022-12-12 23:26:19,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:26:19,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:26:19,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:26:21,441 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 23:26:21,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:26:21,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507949050] [2022-12-12 23:26:21,441 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507949050] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 23:26:21,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045766671] [2022-12-12 23:26:21,441 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-12 23:26:21,441 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:26:21,441 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:26:21,442 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 23:26:21,444 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-12 23:26:21,536 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-12 23:26:21,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 23:26:21,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 47 conjunts are in the unsatisfiable core [2022-12-12 23:26:21,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 23:26:21,860 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 23:26:21,860 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 89 treesize of output 35 [2022-12-12 23:26:21,883 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 23:26:21,883 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 23:26:22,097 INFO L321 Elim1Store]: treesize reduction 23, result has 14.8 percent of original size [2022-12-12 23:26:22,098 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 56 treesize of output 26 [2022-12-12 23:26:22,136 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 23:26:22,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2045766671] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-12 23:26:22,136 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-12 23:26:22,136 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [11, 9] total 26 [2022-12-12 23:26:22,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606280182] [2022-12-12 23:26:22,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 23:26:22,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-12 23:26:22,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:26:22,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-12 23:26:22,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=605, Unknown=0, NotChecked=0, Total=702 [2022-12-12 23:26:22,138 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 22 [2022-12-12 23:26:22,138 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 767 transitions, 19029 flow. Second operand has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 7 states have internal predecessors, (20), 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 23:26:22,138 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:26:22,138 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 22 [2022-12-12 23:26:22,138 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:26:23,272 INFO L130 PetriNetUnfolder]: 1169/2064 cut-off events. [2022-12-12 23:26:23,272 INFO L131 PetriNetUnfolder]: For 320/320 co-relation queries the response was YES. [2022-12-12 23:26:23,274 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27291 conditions, 2064 events. 1169/2064 cut-off events. For 320/320 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 11669 event pairs, 50 based on Foata normal form. 2/1603 useless extension candidates. Maximal degree in co-relation 8918. Up to 2064 conditions per place. [2022-12-12 23:26:23,285 INFO L137 encePairwiseOnDemand]: 10/22 looper letters, 581 selfloop transitions, 214 changer transitions 26/821 dead transitions. [2022-12-12 23:26:23,285 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 821 transitions, 22027 flow [2022-12-12 23:26:23,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-12 23:26:23,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-12-12 23:26:23,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 112 transitions. [2022-12-12 23:26:23,286 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.42424242424242425 [2022-12-12 23:26:23,286 INFO L295 CegarLoopForPetriNet]: 29 programPoint places, 132 predicate places. [2022-12-12 23:26:23,287 INFO L82 GeneralOperation]: Start removeDead. Operand has 161 places, 821 transitions, 22027 flow [2022-12-12 23:26:23,304 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 160 places, 795 transitions, 21315 flow [2022-12-12 23:26:23,304 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 795 transitions, 21315 flow [2022-12-12 23:26:23,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 7 states have internal predecessors, (20), 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 23:26:23,304 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:26:23,304 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:26:23,311 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-12-12 23:26:23,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-12-12 23:26:23,510 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 23:26:23,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:26:23,511 INFO L85 PathProgramCache]: Analyzing trace with hash 628532259, now seen corresponding path program 12 times [2022-12-12 23:26:23,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:26:23,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755169811] [2022-12-12 23:26:23,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:26:23,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:26:23,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:26:24,598 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 23:26:24,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:26:24,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755169811] [2022-12-12 23:26:24,599 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755169811] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 23:26:24,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709531122] [2022-12-12 23:26:24,599 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-12 23:26:24,599 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:26:24,599 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:26:24,600 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 23:26:24,602 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-12 23:26:24,716 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2022-12-12 23:26:24,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 23:26:24,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 34 conjunts are in the unsatisfiable core [2022-12-12 23:26:24,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 23:26:24,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-12 23:26:24,818 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2022-12-12 23:26:24,911 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 23:26:24,912 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 86 treesize of output 35 [2022-12-12 23:26:24,929 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 23:26:24,929 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-12 23:26:24,930 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1709531122] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 23:26:24,930 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-12 23:26:24,930 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10] total 18 [2022-12-12 23:26:24,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489511220] [2022-12-12 23:26:24,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 23:26:24,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-12 23:26:24,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:26:24,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-12 23:26:24,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2022-12-12 23:26:24,931 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 22 [2022-12-12 23:26:24,931 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 795 transitions, 21315 flow. Second operand has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 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 23:26:24,931 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:26:24,931 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 22 [2022-12-12 23:26:24,931 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:26:25,579 INFO L130 PetriNetUnfolder]: 1197/2122 cut-off events. [2022-12-12 23:26:25,579 INFO L131 PetriNetUnfolder]: For 317/317 co-relation queries the response was YES. [2022-12-12 23:26:25,581 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30184 conditions, 2122 events. 1197/2122 cut-off events. For 317/317 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 12144 event pairs, 50 based on Foata normal form. 8/1649 useless extension candidates. Maximal degree in co-relation 10120. Up to 2122 conditions per place. [2022-12-12 23:26:25,594 INFO L137 encePairwiseOnDemand]: 12/22 looper letters, 737 selfloop transitions, 82 changer transitions 28/847 dead transitions. [2022-12-12 23:26:25,594 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 847 transitions, 24415 flow [2022-12-12 23:26:25,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-12 23:26:25,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-12 23:26:25,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 69 transitions. [2022-12-12 23:26:25,596 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.39204545454545453 [2022-12-12 23:26:25,596 INFO L295 CegarLoopForPetriNet]: 29 programPoint places, 138 predicate places. [2022-12-12 23:26:25,596 INFO L82 GeneralOperation]: Start removeDead. Operand has 167 places, 847 transitions, 24415 flow [2022-12-12 23:26:25,643 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 166 places, 819 transitions, 23595 flow [2022-12-12 23:26:25,644 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 819 transitions, 23595 flow [2022-12-12 23:26:25,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 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 23:26:25,644 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:26:25,644 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:26:25,649 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-12-12 23:26:25,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-12-12 23:26:25,845 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 23:26:25,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:26:25,845 INFO L85 PathProgramCache]: Analyzing trace with hash -1069702525, now seen corresponding path program 13 times [2022-12-12 23:26:25,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:26:25,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469444685] [2022-12-12 23:26:25,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:26:25,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:26:25,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:26:26,668 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 23:26:26,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:26:26,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469444685] [2022-12-12 23:26:26,669 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469444685] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 23:26:26,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1178812004] [2022-12-12 23:26:26,669 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-12 23:26:26,669 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:26:26,669 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:26:26,670 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 23:26:26,672 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-12 23:26:26,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:26:26,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 41 conjunts are in the unsatisfiable core [2022-12-12 23:26:26,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 23:26:26,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-12 23:26:26,967 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 34 [2022-12-12 23:26:27,036 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 23:26:27,037 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 86 treesize of output 35 [2022-12-12 23:26:27,059 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 23:26:27,060 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-12 23:26:27,060 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1178812004] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 23:26:27,060 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-12 23:26:27,060 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10] total 18 [2022-12-12 23:26:27,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451335395] [2022-12-12 23:26:27,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 23:26:27,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-12 23:26:27,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:26:27,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-12 23:26:27,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2022-12-12 23:26:27,061 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 22 [2022-12-12 23:26:27,062 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 819 transitions, 23595 flow. Second operand has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 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 23:26:27,062 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:26:27,062 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 22 [2022-12-12 23:26:27,062 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:26:27,638 INFO L130 PetriNetUnfolder]: 1191/2116 cut-off events. [2022-12-12 23:26:27,638 INFO L131 PetriNetUnfolder]: For 321/321 co-relation queries the response was YES. [2022-12-12 23:26:27,641 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32217 conditions, 2116 events. 1191/2116 cut-off events. For 321/321 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 12136 event pairs, 50 based on Foata normal form. 2/1643 useless extension candidates. Maximal degree in co-relation 10786. Up to 2116 conditions per place. [2022-12-12 23:26:27,654 INFO L137 encePairwiseOnDemand]: 13/22 looper letters, 737 selfloop transitions, 77 changer transitions 31/845 dead transitions. [2022-12-12 23:26:27,654 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 845 transitions, 26049 flow [2022-12-12 23:26:27,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-12 23:26:27,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-12 23:26:27,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 67 transitions. [2022-12-12 23:26:27,656 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.3806818181818182 [2022-12-12 23:26:27,656 INFO L295 CegarLoopForPetriNet]: 29 programPoint places, 144 predicate places. [2022-12-12 23:26:27,656 INFO L82 GeneralOperation]: Start removeDead. Operand has 173 places, 845 transitions, 26049 flow [2022-12-12 23:26:27,675 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 170 places, 814 transitions, 25083 flow [2022-12-12 23:26:27,676 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 814 transitions, 25083 flow [2022-12-12 23:26:27,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 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 23:26:27,676 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:26:27,676 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:26:27,683 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-12-12 23:26:27,881 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-12-12 23:26:27,882 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 23:26:27,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:26:27,882 INFO L85 PathProgramCache]: Analyzing trace with hash 2143808647, now seen corresponding path program 14 times [2022-12-12 23:26:27,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:26:27,882 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145822586] [2022-12-12 23:26:27,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:26:27,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:26:27,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:26:29,026 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 23:26:29,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:26:29,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145822586] [2022-12-12 23:26:29,027 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145822586] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 23:26:29,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68371381] [2022-12-12 23:26:29,027 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-12 23:26:29,027 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:26:29,027 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:26:29,028 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 23:26:29,032 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-12 23:26:29,329 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-12-12 23:26:29,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 23:26:29,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 34 conjunts are in the unsatisfiable core [2022-12-12 23:26:29,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 23:26:29,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-12 23:26:29,445 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 23 [2022-12-12 23:26:29,523 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 23:26:29,524 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 86 treesize of output 35 [2022-12-12 23:26:29,542 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 23:26:29,542 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-12 23:26:29,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [68371381] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 23:26:29,542 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-12 23:26:29,542 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [11] total 19 [2022-12-12 23:26:29,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533521354] [2022-12-12 23:26:29,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 23:26:29,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-12 23:26:29,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:26:29,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-12 23:26:29,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2022-12-12 23:26:29,543 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 22 [2022-12-12 23:26:29,543 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 814 transitions, 25083 flow. Second operand has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 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 23:26:29,543 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:26:29,543 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 22 [2022-12-12 23:26:29,543 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:26:30,236 INFO L130 PetriNetUnfolder]: 1203/2130 cut-off events. [2022-12-12 23:26:30,236 INFO L131 PetriNetUnfolder]: For 331/331 co-relation queries the response was YES. [2022-12-12 23:26:30,237 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34564 conditions, 2130 events. 1203/2130 cut-off events. For 331/331 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 12199 event pairs, 50 based on Foata normal form. 2/1659 useless extension candidates. Maximal degree in co-relation 11544. Up to 2130 conditions per place. [2022-12-12 23:26:30,248 INFO L137 encePairwiseOnDemand]: 12/22 looper letters, 741 selfloop transitions, 83 changer transitions 28/852 dead transitions. [2022-12-12 23:26:30,249 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 852 transitions, 27975 flow [2022-12-12 23:26:30,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-12 23:26:30,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-12 23:26:30,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 73 transitions. [2022-12-12 23:26:30,249 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.4147727272727273 [2022-12-12 23:26:30,250 INFO L295 CegarLoopForPetriNet]: 29 programPoint places, 148 predicate places. [2022-12-12 23:26:30,250 INFO L82 GeneralOperation]: Start removeDead. Operand has 177 places, 852 transitions, 27975 flow [2022-12-12 23:26:30,267 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 176 places, 824 transitions, 27043 flow [2022-12-12 23:26:30,267 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 824 transitions, 27043 flow [2022-12-12 23:26:30,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 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 23:26:30,268 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:26:30,268 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:26:30,275 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-12-12 23:26:30,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:26:30,468 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 23:26:30,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:26:30,469 INFO L85 PathProgramCache]: Analyzing trace with hash 157196383, now seen corresponding path program 15 times [2022-12-12 23:26:30,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:26:30,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480733308] [2022-12-12 23:26:30,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:26:30,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:26:30,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:26:32,306 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 23:26:32,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:26:32,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480733308] [2022-12-12 23:26:32,307 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480733308] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 23:26:32,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [302058702] [2022-12-12 23:26:32,307 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-12 23:26:32,307 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:26:32,307 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:26:32,308 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 23:26:32,310 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-12 23:26:32,612 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-12-12 23:26:32,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 23:26:32,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 41 conjunts are in the unsatisfiable core [2022-12-12 23:26:32,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 23:26:32,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-12 23:26:32,764 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2022-12-12 23:26:32,862 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 23:26:32,863 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 89 treesize of output 35 [2022-12-12 23:26:32,883 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 23:26:32,883 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-12 23:26:32,883 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [302058702] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 23:26:32,883 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-12 23:26:32,884 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [11] total 19 [2022-12-12 23:26:32,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322774071] [2022-12-12 23:26:32,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 23:26:32,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-12 23:26:32,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:26:32,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-12 23:26:32,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2022-12-12 23:26:32,885 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 22 [2022-12-12 23:26:32,885 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 824 transitions, 27043 flow. Second operand has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 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 23:26:32,885 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:26:32,885 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 22 [2022-12-12 23:26:32,885 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:26:33,535 INFO L130 PetriNetUnfolder]: 1258/2221 cut-off events. [2022-12-12 23:26:33,536 INFO L131 PetriNetUnfolder]: For 350/350 co-relation queries the response was YES. [2022-12-12 23:26:33,538 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38262 conditions, 2221 events. 1258/2221 cut-off events. For 350/350 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 12802 event pairs, 50 based on Foata normal form. 2/1724 useless extension candidates. Maximal degree in co-relation 12669. Up to 2221 conditions per place. [2022-12-12 23:26:33,551 INFO L137 encePairwiseOnDemand]: 12/22 looper letters, 794 selfloop transitions, 71 changer transitions 28/893 dead transitions. [2022-12-12 23:26:33,552 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 893 transitions, 31112 flow [2022-12-12 23:26:33,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-12 23:26:33,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-12 23:26:33,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 72 transitions. [2022-12-12 23:26:33,552 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.4090909090909091 [2022-12-12 23:26:33,553 INFO L295 CegarLoopForPetriNet]: 29 programPoint places, 154 predicate places. [2022-12-12 23:26:33,553 INFO L82 GeneralOperation]: Start removeDead. Operand has 183 places, 893 transitions, 31112 flow [2022-12-12 23:26:33,607 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 182 places, 865 transitions, 30124 flow [2022-12-12 23:26:33,607 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 865 transitions, 30124 flow [2022-12-12 23:26:33,608 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 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 23:26:33,608 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:26:33,608 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:26:33,613 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-12-12 23:26:33,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-12-12 23:26:33,808 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 23:26:33,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:26:33,809 INFO L85 PathProgramCache]: Analyzing trace with hash -1420252705, now seen corresponding path program 16 times [2022-12-12 23:26:33,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:26:33,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484032765] [2022-12-12 23:26:33,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:26:33,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:26:33,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:26:34,968 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 23:26:34,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:26:34,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484032765] [2022-12-12 23:26:34,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484032765] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 23:26:34,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362489753] [2022-12-12 23:26:34,968 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-12 23:26:34,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:26:34,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:26:34,970 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 23:26:34,972 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-12-12 23:26:35,080 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-12 23:26:35,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 23:26:35,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 56 conjunts are in the unsatisfiable core [2022-12-12 23:26:35,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 23:26:35,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-12 23:26:35,389 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 35 [2022-12-12 23:26:35,514 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 23:26:35,517 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 83 treesize of output 35 [2022-12-12 23:26:35,543 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 23:26:35,544 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 23:26:35,803 INFO L321 Elim1Store]: treesize reduction 23, result has 14.8 percent of original size [2022-12-12 23:26:35,803 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 87 treesize of output 57 [2022-12-12 23:26:35,814 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 23:26:35,814 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 7 [2022-12-12 23:26:36,057 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 23:26:36,057 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1362489753] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 23:26:36,057 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 23:26:36,057 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 31 [2022-12-12 23:26:36,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853241816] [2022-12-12 23:26:36,058 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 23:26:36,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-12-12 23:26:36,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:26:36,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-12-12 23:26:36,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=873, Unknown=1, NotChecked=0, Total=1056 [2022-12-12 23:26:36,059 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 22 [2022-12-12 23:26:36,059 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 865 transitions, 30124 flow. Second operand has 33 states, 32 states have (on average 1.96875) internal successors, (63), 32 states have internal predecessors, (63), 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 23:26:36,059 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:26:36,059 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 22 [2022-12-12 23:26:36,059 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:26:39,740 INFO L130 PetriNetUnfolder]: 1336/2391 cut-off events. [2022-12-12 23:26:39,740 INFO L131 PetriNetUnfolder]: For 385/385 co-relation queries the response was YES. [2022-12-12 23:26:39,742 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43590 conditions, 2391 events. 1336/2391 cut-off events. For 385/385 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 14260 event pairs, 50 based on Foata normal form. 2/1870 useless extension candidates. Maximal degree in co-relation 15232. Up to 2391 conditions per place. [2022-12-12 23:26:39,756 INFO L137 encePairwiseOnDemand]: 8/22 looper letters, 739 selfloop transitions, 216 changer transitions 30/985 dead transitions. [2022-12-12 23:26:39,757 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 985 transitions, 36300 flow [2022-12-12 23:26:39,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-12-12 23:26:39,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2022-12-12 23:26:39,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 241 transitions. [2022-12-12 23:26:39,758 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.3319559228650138 [2022-12-12 23:26:39,759 INFO L295 CegarLoopForPetriNet]: 29 programPoint places, 185 predicate places. [2022-12-12 23:26:39,759 INFO L82 GeneralOperation]: Start removeDead. Operand has 214 places, 985 transitions, 36300 flow [2022-12-12 23:26:39,782 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 209 places, 955 transitions, 35184 flow [2022-12-12 23:26:39,782 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 955 transitions, 35184 flow [2022-12-12 23:26:39,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 1.96875) internal successors, (63), 32 states have internal predecessors, (63), 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 23:26:39,782 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:26:39,783 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:26:39,788 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-12-12 23:26:39,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-12-12 23:26:39,983 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 23:26:39,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:26:39,984 INFO L85 PathProgramCache]: Analyzing trace with hash -977353565, now seen corresponding path program 17 times [2022-12-12 23:26:39,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:26:39,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381843429] [2022-12-12 23:26:39,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:26:39,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:26:40,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:26:40,694 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 23:26:40,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:26:40,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381843429] [2022-12-12 23:26:40,694 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381843429] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 23:26:40,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2095895075] [2022-12-12 23:26:40,695 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-12 23:26:40,695 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:26:40,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:26:40,696 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 23:26:40,699 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-12-12 23:26:40,815 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-12 23:26:40,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 23:26:40,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 43 conjunts are in the unsatisfiable core [2022-12-12 23:26:40,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 23:26:40,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-12 23:26:40,990 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 34 [2022-12-12 23:26:41,069 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 23:26:41,069 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 89 treesize of output 35 [2022-12-12 23:26:41,089 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 23:26:41,089 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-12 23:26:41,089 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2095895075] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 23:26:41,089 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-12 23:26:41,089 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10] total 18 [2022-12-12 23:26:41,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482289552] [2022-12-12 23:26:41,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 23:26:41,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-12 23:26:41,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:26:41,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-12 23:26:41,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2022-12-12 23:26:41,091 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 22 [2022-12-12 23:26:41,091 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 955 transitions, 35184 flow. Second operand has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 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 23:26:41,091 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:26:41,091 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 22 [2022-12-12 23:26:41,091 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:26:41,840 INFO L130 PetriNetUnfolder]: 1334/2381 cut-off events. [2022-12-12 23:26:41,840 INFO L131 PetriNetUnfolder]: For 377/377 co-relation queries the response was YES. [2022-12-12 23:26:41,842 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45792 conditions, 2381 events. 1334/2381 cut-off events. For 377/377 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 14131 event pairs, 50 based on Foata normal form. 2/1868 useless extension candidates. Maximal degree in co-relation 15972. Up to 2381 conditions per place. [2022-12-12 23:26:41,897 INFO L137 encePairwiseOnDemand]: 13/22 looper letters, 871 selfloop transitions, 79 changer transitions 31/981 dead transitions. [2022-12-12 23:26:41,897 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 981 transitions, 38118 flow [2022-12-12 23:26:41,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-12 23:26:41,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-12 23:26:41,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 73 transitions. [2022-12-12 23:26:41,898 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.4147727272727273 [2022-12-12 23:26:41,899 INFO L295 CegarLoopForPetriNet]: 29 programPoint places, 187 predicate places. [2022-12-12 23:26:41,899 INFO L82 GeneralOperation]: Start removeDead. Operand has 216 places, 981 transitions, 38118 flow [2022-12-12 23:26:41,922 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 212 places, 950 transitions, 36904 flow [2022-12-12 23:26:41,922 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 950 transitions, 36904 flow [2022-12-12 23:26:41,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 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 23:26:41,922 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:26:41,923 INFO L214 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:26:41,928 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-12-12 23:26:42,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-12-12 23:26:42,124 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 23:26:42,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:26:42,124 INFO L85 PathProgramCache]: Analyzing trace with hash -1286952766, now seen corresponding path program 18 times [2022-12-12 23:26:42,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:26:42,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370422268] [2022-12-12 23:26:42,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:26:42,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:26:42,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:26:43,906 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 23:26:43,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:26:43,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370422268] [2022-12-12 23:26:43,907 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370422268] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 23:26:43,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141276168] [2022-12-12 23:26:43,907 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-12 23:26:43,907 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:26:43,907 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:26:43,908 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 23:26:43,910 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-12-12 23:26:44,008 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2022-12-12 23:26:44,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 23:26:44,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 41 conjunts are in the unsatisfiable core [2022-12-12 23:26:44,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 23:26:44,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-12 23:26:44,163 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 23 [2022-12-12 23:26:44,259 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 23:26:44,259 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 89 treesize of output 35 [2022-12-12 23:26:44,292 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-12 23:26:44,292 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-12 23:26:44,292 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2141276168] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 23:26:44,292 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-12 23:26:44,293 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [12] total 20 [2022-12-12 23:26:44,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835636155] [2022-12-12 23:26:44,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 23:26:44,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-12 23:26:44,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:26:44,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-12 23:26:44,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=412, Unknown=0, NotChecked=0, Total=462 [2022-12-12 23:26:44,295 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 22 [2022-12-12 23:26:44,295 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 950 transitions, 36904 flow. Second operand has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 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 23:26:44,295 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:26:44,295 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 22 [2022-12-12 23:26:44,295 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:26:45,131 INFO L130 PetriNetUnfolder]: 1327/2351 cut-off events. [2022-12-12 23:26:45,131 INFO L131 PetriNetUnfolder]: For 387/387 co-relation queries the response was YES. [2022-12-12 23:26:45,134 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47569 conditions, 2351 events. 1327/2351 cut-off events. For 387/387 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 13803 event pairs, 50 based on Foata normal form. 1/1852 useless extension candidates. Maximal degree in co-relation 16600. Up to 2351 conditions per place. [2022-12-12 23:26:45,150 INFO L137 encePairwiseOnDemand]: 11/22 looper letters, 876 selfloop transitions, 77 changer transitions 14/967 dead transitions. [2022-12-12 23:26:45,150 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 967 transitions, 39505 flow [2022-12-12 23:26:45,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-12 23:26:45,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-12 23:26:45,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 77 transitions. [2022-12-12 23:26:45,151 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.4375 [2022-12-12 23:26:45,152 INFO L295 CegarLoopForPetriNet]: 29 programPoint places, 190 predicate places. [2022-12-12 23:26:45,152 INFO L82 GeneralOperation]: Start removeDead. Operand has 219 places, 967 transitions, 39505 flow [2022-12-12 23:26:45,178 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 218 places, 953 transitions, 38927 flow [2022-12-12 23:26:45,178 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 953 transitions, 38927 flow [2022-12-12 23:26:45,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 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 23:26:45,178 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:26:45,178 INFO L214 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:26:45,183 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-12-12 23:26:45,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:26:45,379 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 23:26:45,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:26:45,379 INFO L85 PathProgramCache]: Analyzing trace with hash 1698336470, now seen corresponding path program 19 times [2022-12-12 23:26:45,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:26:45,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589823777] [2022-12-12 23:26:45,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:26:45,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:26:45,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:26:46,937 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 23:26:46,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:26:46,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589823777] [2022-12-12 23:26:46,937 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589823777] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 23:26:46,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1738254488] [2022-12-12 23:26:46,937 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-12 23:26:46,937 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:26:46,937 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:26:46,939 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 23:26:46,942 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-12-12 23:26:47,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:26:47,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 45 conjunts are in the unsatisfiable core [2022-12-12 23:26:47,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 23:26:47,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-12 23:26:47,174 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 23 [2022-12-12 23:26:47,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-12 23:26:47,209 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 23 [2022-12-12 23:26:47,327 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 23:26:47,328 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 89 treesize of output 35 [2022-12-12 23:26:47,349 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-12 23:26:47,349 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-12 23:26:47,349 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1738254488] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 23:26:47,349 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-12 23:26:47,349 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [11] total 20 [2022-12-12 23:26:47,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406733276] [2022-12-12 23:26:47,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 23:26:47,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-12 23:26:47,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:26:47,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-12 23:26:47,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=413, Unknown=0, NotChecked=0, Total=462 [2022-12-12 23:26:47,350 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 22 [2022-12-12 23:26:47,350 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 953 transitions, 38927 flow. Second operand has 11 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 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 23:26:47,350 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:26:47,350 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 22 [2022-12-12 23:26:47,351 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:26:48,185 INFO L130 PetriNetUnfolder]: 1351/2395 cut-off events. [2022-12-12 23:26:48,186 INFO L131 PetriNetUnfolder]: For 382/382 co-relation queries the response was YES. [2022-12-12 23:26:48,188 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50856 conditions, 2395 events. 1351/2395 cut-off events. For 382/382 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 14054 event pairs, 55 based on Foata normal form. 13/1899 useless extension candidates. Maximal degree in co-relation 17420. Up to 2395 conditions per place. [2022-12-12 23:26:48,205 INFO L137 encePairwiseOnDemand]: 12/22 looper letters, 883 selfloop transitions, 87 changer transitions 13/983 dead transitions. [2022-12-12 23:26:48,205 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 983 transitions, 42126 flow [2022-12-12 23:26:48,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-12 23:26:48,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-12 23:26:48,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 77 transitions. [2022-12-12 23:26:48,206 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.4375 [2022-12-12 23:26:48,207 INFO L295 CegarLoopForPetriNet]: 29 programPoint places, 196 predicate places. [2022-12-12 23:26:48,207 INFO L82 GeneralOperation]: Start removeDead. Operand has 225 places, 983 transitions, 42126 flow [2022-12-12 23:26:48,235 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 224 places, 970 transitions, 41562 flow [2022-12-12 23:26:48,235 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 970 transitions, 41562 flow [2022-12-12 23:26:48,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 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 23:26:48,235 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:26:48,235 INFO L214 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:26:48,243 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-12-12 23:26:48,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:26:48,436 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 23:26:48,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:26:48,437 INFO L85 PathProgramCache]: Analyzing trace with hash -1908918936, now seen corresponding path program 20 times [2022-12-12 23:26:48,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:26:48,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500674045] [2022-12-12 23:26:48,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:26:48,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:26:48,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:26:49,642 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 23:26:49,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:26:49,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500674045] [2022-12-12 23:26:49,643 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500674045] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 23:26:49,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75714358] [2022-12-12 23:26:49,643 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-12 23:26:49,643 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:26:49,643 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:26:49,644 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 23:26:49,646 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-12-12 23:26:49,942 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-12-12 23:26:49,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 23:26:49,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 39 conjunts are in the unsatisfiable core [2022-12-12 23:26:49,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 23:26:50,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-12 23:26:50,055 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2022-12-12 23:26:50,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-12 23:26:50,159 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 34 [2022-12-12 23:26:50,227 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 23:26:50,228 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 89 treesize of output 35 [2022-12-12 23:26:50,260 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-12 23:26:50,261 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-12 23:26:50,261 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [75714358] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 23:26:50,261 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-12 23:26:50,261 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [12] total 21 [2022-12-12 23:26:50,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48327611] [2022-12-12 23:26:50,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 23:26:50,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-12 23:26:50,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:26:50,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-12 23:26:50,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2022-12-12 23:26:50,262 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 22 [2022-12-12 23:26:50,262 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 970 transitions, 41562 flow. Second operand has 11 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 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 23:26:50,262 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:26:50,262 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 22 [2022-12-12 23:26:50,262 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:26:51,152 INFO L130 PetriNetUnfolder]: 1346/2395 cut-off events. [2022-12-12 23:26:51,152 INFO L131 PetriNetUnfolder]: For 389/389 co-relation queries the response was YES. [2022-12-12 23:26:51,154 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53252 conditions, 2395 events. 1346/2395 cut-off events. For 389/389 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 14162 event pairs, 55 based on Foata normal form. 1/1887 useless extension candidates. Maximal degree in co-relation 18240. Up to 2395 conditions per place. [2022-12-12 23:26:51,175 INFO L137 encePairwiseOnDemand]: 13/22 looper letters, 883 selfloop transitions, 83 changer transitions 17/983 dead transitions. [2022-12-12 23:26:51,175 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 983 transitions, 44092 flow [2022-12-12 23:26:51,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-12 23:26:51,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-12 23:26:51,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 75 transitions. [2022-12-12 23:26:51,180 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.42613636363636365 [2022-12-12 23:26:51,180 INFO L295 CegarLoopForPetriNet]: 29 programPoint places, 202 predicate places. [2022-12-12 23:26:51,180 INFO L82 GeneralOperation]: Start removeDead. Operand has 231 places, 983 transitions, 44092 flow [2022-12-12 23:26:51,214 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 227 places, 966 transitions, 43326 flow [2022-12-12 23:26:51,215 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 966 transitions, 43326 flow [2022-12-12 23:26:51,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 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 23:26:51,215 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:26:51,215 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:26:51,220 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-12-12 23:26:51,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-12-12 23:26:51,416 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 23:26:51,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:26:51,416 INFO L85 PathProgramCache]: Analyzing trace with hash 1842997547, now seen corresponding path program 1 times [2022-12-12 23:26:51,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:26:51,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558709175] [2022-12-12 23:26:51,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:26:51,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:26:51,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:26:51,506 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 23:26:51,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:26:51,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558709175] [2022-12-12 23:26:51,507 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558709175] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 23:26:51,507 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-12 23:26:51,507 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-12 23:26:51,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780320246] [2022-12-12 23:26:51,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 23:26:51,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-12 23:26:51,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:26:51,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-12 23:26:51,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-12 23:26:51,510 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 22 [2022-12-12 23:26:51,510 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 966 transitions, 43326 flow. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 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 23:26:51,510 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:26:51,510 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 22 [2022-12-12 23:26:51,510 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:26:52,408 INFO L130 PetriNetUnfolder]: 1374/2488 cut-off events. [2022-12-12 23:26:52,408 INFO L131 PetriNetUnfolder]: For 422/422 co-relation queries the response was YES. [2022-12-12 23:26:52,412 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57822 conditions, 2488 events. 1374/2488 cut-off events. For 422/422 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 15096 event pairs, 5 based on Foata normal form. 0/2041 useless extension candidates. Maximal degree in co-relation 20987. Up to 2488 conditions per place. [2022-12-12 23:26:52,433 INFO L137 encePairwiseOnDemand]: 16/22 looper letters, 1024 selfloop transitions, 119 changer transitions 0/1143 dead transitions. [2022-12-12 23:26:52,433 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 1143 transitions, 53577 flow [2022-12-12 23:26:52,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-12 23:26:52,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-12 23:26:52,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 70 transitions. [2022-12-12 23:26:52,434 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.5303030303030303 [2022-12-12 23:26:52,434 INFO L295 CegarLoopForPetriNet]: 29 programPoint places, 203 predicate places. [2022-12-12 23:26:52,434 INFO L82 GeneralOperation]: Start removeDead. Operand has 232 places, 1143 transitions, 53577 flow [2022-12-12 23:26:52,471 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 232 places, 1143 transitions, 53577 flow [2022-12-12 23:26:52,472 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 1143 transitions, 53577 flow [2022-12-12 23:26:52,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 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 23:26:52,472 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:26:52,472 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:26:52,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-12-12 23:26:52,472 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 23:26:52,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:26:52,473 INFO L85 PathProgramCache]: Analyzing trace with hash -79031095, now seen corresponding path program 2 times [2022-12-12 23:26:52,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:26:52,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371804229] [2022-12-12 23:26:52,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:26:52,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:26:52,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:26:52,620 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 23:26:52,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:26:52,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371804229] [2022-12-12 23:26:52,621 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371804229] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 23:26:52,621 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-12 23:26:52,621 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-12 23:26:52,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488173738] [2022-12-12 23:26:52,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 23:26:52,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-12 23:26:52,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:26:52,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-12 23:26:52,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-12 23:26:52,622 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 22 [2022-12-12 23:26:52,622 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 1143 transitions, 53577 flow. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 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 23:26:52,622 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:26:52,622 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 22 [2022-12-12 23:26:52,622 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:26:53,555 INFO L130 PetriNetUnfolder]: 1133/2175 cut-off events. [2022-12-12 23:26:53,555 INFO L131 PetriNetUnfolder]: For 376/376 co-relation queries the response was YES. [2022-12-12 23:26:53,557 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52757 conditions, 2175 events. 1133/2175 cut-off events. For 376/376 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 13606 event pairs, 5 based on Foata normal form. 102/1909 useless extension candidates. Maximal degree in co-relation 17560. Up to 2175 conditions per place. [2022-12-12 23:26:53,573 INFO L137 encePairwiseOnDemand]: 17/22 looper letters, 818 selfloop transitions, 70 changer transitions 149/1037 dead transitions. [2022-12-12 23:26:53,573 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 1037 transitions, 50688 flow [2022-12-12 23:26:53,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-12 23:26:53,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-12 23:26:53,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 54 transitions. [2022-12-12 23:26:53,574 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.4909090909090909 [2022-12-12 23:26:53,574 INFO L295 CegarLoopForPetriNet]: 29 programPoint places, 206 predicate places. [2022-12-12 23:26:53,574 INFO L82 GeneralOperation]: Start removeDead. Operand has 235 places, 1037 transitions, 50688 flow [2022-12-12 23:26:53,601 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 228 places, 888 transitions, 43365 flow [2022-12-12 23:26:53,602 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 888 transitions, 43365 flow [2022-12-12 23:26:53,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 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 23:26:53,602 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:26:53,602 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:26:53,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-12-12 23:26:53,602 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 23:26:53,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:26:53,602 INFO L85 PathProgramCache]: Analyzing trace with hash 1647205575, now seen corresponding path program 3 times [2022-12-12 23:26:53,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:26:53,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865448054] [2022-12-12 23:26:53,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:26:53,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:26:53,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:26:53,670 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 23:26:53,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:26:53,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865448054] [2022-12-12 23:26:53,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865448054] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 23:26:53,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1736274527] [2022-12-12 23:26:53,671 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-12 23:26:53,671 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:26:53,671 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:26:53,676 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 23:26:53,679 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-12-12 23:26:53,824 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-12 23:26:53,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 23:26:53,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-12 23:26:53,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 23:26:53,849 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 23:26:53,849 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 23:26:53,879 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 23:26:53,879 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1736274527] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 23:26:53,879 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 23:26:53,879 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2022-12-12 23:26:53,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434791978] [2022-12-12 23:26:53,879 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 23:26:53,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-12 23:26:53,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:26:53,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-12 23:26:53,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-12-12 23:26:53,880 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 22 [2022-12-12 23:26:53,880 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 888 transitions, 43365 flow. Second operand has 8 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 23:26:53,880 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:26:53,880 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 22 [2022-12-12 23:26:53,880 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:26:54,551 INFO L130 PetriNetUnfolder]: 1045/1877 cut-off events. [2022-12-12 23:26:54,551 INFO L131 PetriNetUnfolder]: For 291/291 co-relation queries the response was YES. [2022-12-12 23:26:54,553 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47368 conditions, 1877 events. 1045/1877 cut-off events. For 291/291 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 10434 event pairs, 5 based on Foata normal form. 0/1568 useless extension candidates. Maximal degree in co-relation 15747. Up to 1877 conditions per place. [2022-12-12 23:26:54,569 INFO L137 encePairwiseOnDemand]: 17/22 looper letters, 756 selfloop transitions, 80 changer transitions 0/836 dead transitions. [2022-12-12 23:26:54,569 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 836 transitions, 42469 flow [2022-12-12 23:26:54,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-12 23:26:54,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-12 23:26:54,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 61 transitions. [2022-12-12 23:26:54,570 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.5545454545454546 [2022-12-12 23:26:54,570 INFO L295 CegarLoopForPetriNet]: 29 programPoint places, 197 predicate places. [2022-12-12 23:26:54,570 INFO L82 GeneralOperation]: Start removeDead. Operand has 226 places, 836 transitions, 42469 flow [2022-12-12 23:26:54,595 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 226 places, 836 transitions, 42469 flow [2022-12-12 23:26:54,596 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 836 transitions, 42469 flow [2022-12-12 23:26:54,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 23:26:54,596 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:26:54,596 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:26:54,601 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-12-12 23:26:54,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-12-12 23:26:54,797 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 23:26:54,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:26:54,797 INFO L85 PathProgramCache]: Analyzing trace with hash -1207353369, now seen corresponding path program 1 times [2022-12-12 23:26:54,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:26:54,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341857670] [2022-12-12 23:26:54,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:26:54,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:26:54,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:26:54,866 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 23:26:54,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:26:54,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341857670] [2022-12-12 23:26:54,866 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341857670] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 23:26:54,866 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-12 23:26:54,866 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-12 23:26:54,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62285846] [2022-12-12 23:26:54,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 23:26:54,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-12 23:26:54,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:26:54,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-12 23:26:54,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-12 23:26:54,867 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 22 [2022-12-12 23:26:54,868 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 836 transitions, 42469 flow. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 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 23:26:54,868 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:26:54,868 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 22 [2022-12-12 23:26:54,868 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:26:55,484 INFO L130 PetriNetUnfolder]: 969/1762 cut-off events. [2022-12-12 23:26:55,484 INFO L131 PetriNetUnfolder]: For 272/272 co-relation queries the response was YES. [2022-12-12 23:26:55,485 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46234 conditions, 1762 events. 969/1762 cut-off events. For 272/272 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 9718 event pairs, 5 based on Foata normal form. 14/1502 useless extension candidates. Maximal degree in co-relation 15610. Up to 1762 conditions per place. [2022-12-12 23:26:55,578 INFO L137 encePairwiseOnDemand]: 16/22 looper letters, 697 selfloop transitions, 71 changer transitions 15/783 dead transitions. [2022-12-12 23:26:55,579 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 783 transitions, 41349 flow [2022-12-12 23:26:55,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-12 23:26:55,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-12 23:26:55,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 61 transitions. [2022-12-12 23:26:55,579 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.4621212121212121 [2022-12-12 23:26:55,580 INFO L295 CegarLoopForPetriNet]: 29 programPoint places, 202 predicate places. [2022-12-12 23:26:55,580 INFO L82 GeneralOperation]: Start removeDead. Operand has 231 places, 783 transitions, 41349 flow [2022-12-12 23:26:55,602 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 229 places, 768 transitions, 40554 flow [2022-12-12 23:26:55,603 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 768 transitions, 40554 flow [2022-12-12 23:26:55,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 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 23:26:55,603 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:26:55,603 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:26:55,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-12-12 23:26:55,603 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 23:26:55,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:26:55,603 INFO L85 PathProgramCache]: Analyzing trace with hash -2015183103, now seen corresponding path program 2 times [2022-12-12 23:26:55,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:26:55,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534501921] [2022-12-12 23:26:55,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:26:55,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:26:55,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:26:55,684 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 23:26:55,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:26:55,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534501921] [2022-12-12 23:26:55,684 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534501921] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 23:26:55,684 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-12 23:26:55,684 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-12 23:26:55,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345893252] [2022-12-12 23:26:55,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 23:26:55,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-12 23:26:55,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:26:55,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-12 23:26:55,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-12 23:26:55,686 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 22 [2022-12-12 23:26:55,686 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 768 transitions, 40554 flow. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 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 23:26:55,686 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:26:55,686 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 22 [2022-12-12 23:26:55,686 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:26:56,268 INFO L130 PetriNetUnfolder]: 922/1688 cut-off events. [2022-12-12 23:26:56,268 INFO L131 PetriNetUnfolder]: For 267/267 co-relation queries the response was YES. [2022-12-12 23:26:56,269 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45981 conditions, 1688 events. 922/1688 cut-off events. For 267/267 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 9318 event pairs, 5 based on Foata normal form. 14/1453 useless extension candidates. Maximal degree in co-relation 15770. Up to 1688 conditions per place. [2022-12-12 23:26:56,284 INFO L137 encePairwiseOnDemand]: 17/22 looper letters, 666 selfloop transitions, 65 changer transitions 15/746 dead transitions. [2022-12-12 23:26:56,284 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 746 transitions, 40890 flow [2022-12-12 23:26:56,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-12 23:26:56,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-12 23:26:56,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 55 transitions. [2022-12-12 23:26:56,285 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.5 [2022-12-12 23:26:56,285 INFO L295 CegarLoopForPetriNet]: 29 programPoint places, 204 predicate places. [2022-12-12 23:26:56,285 INFO L82 GeneralOperation]: Start removeDead. Operand has 233 places, 746 transitions, 40890 flow [2022-12-12 23:26:56,310 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 232 places, 731 transitions, 40065 flow [2022-12-12 23:26:56,310 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 731 transitions, 40065 flow [2022-12-12 23:26:56,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 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 23:26:56,310 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:26:56,310 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:26:56,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-12-12 23:26:56,310 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 23:26:56,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:26:56,311 INFO L85 PathProgramCache]: Analyzing trace with hash -432697179, now seen corresponding path program 3 times [2022-12-12 23:26:56,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:26:56,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29416319] [2022-12-12 23:26:56,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:26:56,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:26:56,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:26:56,367 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 23:26:56,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:26:56,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29416319] [2022-12-12 23:26:56,367 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29416319] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 23:26:56,367 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-12 23:26:56,367 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-12 23:26:56,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810819324] [2022-12-12 23:26:56,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 23:26:56,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-12 23:26:56,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:26:56,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-12 23:26:56,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-12 23:26:56,368 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 22 [2022-12-12 23:26:56,368 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 731 transitions, 40065 flow. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 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 23:26:56,368 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:26:56,368 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 22 [2022-12-12 23:26:56,368 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:26:56,927 INFO L130 PetriNetUnfolder]: 848/1536 cut-off events. [2022-12-12 23:26:56,927 INFO L131 PetriNetUnfolder]: For 238/238 co-relation queries the response was YES. [2022-12-12 23:26:56,928 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43372 conditions, 1536 events. 848/1536 cut-off events. For 238/238 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 8133 event pairs, 5 based on Foata normal form. 18/1331 useless extension candidates. Maximal degree in co-relation 14795. Up to 1536 conditions per place. [2022-12-12 23:26:56,943 INFO L137 encePairwiseOnDemand]: 17/22 looper letters, 586 selfloop transitions, 50 changer transitions 34/670 dead transitions. [2022-12-12 23:26:56,944 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 670 transitions, 38054 flow [2022-12-12 23:26:56,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-12 23:26:56,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-12 23:26:56,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 49 transitions. [2022-12-12 23:26:56,944 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.44545454545454544 [2022-12-12 23:26:56,945 INFO L295 CegarLoopForPetriNet]: 29 programPoint places, 207 predicate places. [2022-12-12 23:26:56,945 INFO L82 GeneralOperation]: Start removeDead. Operand has 236 places, 670 transitions, 38054 flow [2022-12-12 23:26:56,969 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 233 places, 636 transitions, 36120 flow [2022-12-12 23:26:56,969 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 636 transitions, 36120 flow [2022-12-12 23:26:56,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 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 23:26:56,969 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:26:56,969 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:26:56,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-12-12 23:26:56,970 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 23:26:56,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:26:56,970 INFO L85 PathProgramCache]: Analyzing trace with hash 272513749, now seen corresponding path program 1 times [2022-12-12 23:26:56,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:26:56,970 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122492117] [2022-12-12 23:26:56,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:26:56,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:26:56,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:26:58,011 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 23:26:58,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:26:58,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122492117] [2022-12-12 23:26:58,011 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122492117] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 23:26:58,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150706509] [2022-12-12 23:26:58,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:26:58,011 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:26:58,012 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:26:58,016 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 23:26:58,027 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-12-12 23:26:58,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:26:58,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 40 conjunts are in the unsatisfiable core [2022-12-12 23:26:58,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 23:26:58,335 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 23:26:58,336 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 23:26:58,451 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 23:26:58,452 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 58 treesize of output 76 [2022-12-12 23:26:59,168 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 23:26:59,168 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1150706509] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 23:26:59,168 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 23:26:59,168 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 8] total 26 [2022-12-12 23:26:59,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444616594] [2022-12-12 23:26:59,169 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 23:26:59,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-12-12 23:26:59,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:26:59,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-12-12 23:26:59,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=666, Unknown=0, NotChecked=0, Total=756 [2022-12-12 23:26:59,169 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 22 [2022-12-12 23:26:59,170 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 636 transitions, 36120 flow. Second operand has 28 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 27 states have internal predecessors, (58), 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 23:26:59,170 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:26:59,170 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 22 [2022-12-12 23:26:59,170 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:27:01,273 INFO L130 PetriNetUnfolder]: 1163/1968 cut-off events. [2022-12-12 23:27:01,274 INFO L131 PetriNetUnfolder]: For 294/294 co-relation queries the response was YES. [2022-12-12 23:27:01,275 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57498 conditions, 1968 events. 1163/1968 cut-off events. For 294/294 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 10095 event pairs, 9 based on Foata normal form. 30/1628 useless extension candidates. Maximal degree in co-relation 19441. Up to 1968 conditions per place. [2022-12-12 23:27:01,292 INFO L137 encePairwiseOnDemand]: 10/22 looper letters, 649 selfloop transitions, 151 changer transitions 26/826 dead transitions. [2022-12-12 23:27:01,292 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 826 transitions, 48541 flow [2022-12-12 23:27:01,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-12-12 23:27:01,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2022-12-12 23:27:01,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 203 transitions. [2022-12-12 23:27:01,293 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.34175084175084175 [2022-12-12 23:27:01,294 INFO L295 CegarLoopForPetriNet]: 29 programPoint places, 230 predicate places. [2022-12-12 23:27:01,294 INFO L82 GeneralOperation]: Start removeDead. Operand has 259 places, 826 transitions, 48541 flow [2022-12-12 23:27:01,324 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 257 places, 800 transitions, 46997 flow [2022-12-12 23:27:01,325 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 800 transitions, 46997 flow [2022-12-12 23:27:01,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 27 states have internal predecessors, (58), 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 23:27:01,325 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:27:01,325 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:27:01,330 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-12-12 23:27:01,525 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-12-12 23:27:01,526 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 23:27:01,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:27:01,526 INFO L85 PathProgramCache]: Analyzing trace with hash 1276525043, now seen corresponding path program 2 times [2022-12-12 23:27:01,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:27:01,526 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620613249] [2022-12-12 23:27:01,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:27:01,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:27:01,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:27:02,350 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 23:27:02,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:27:02,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620613249] [2022-12-12 23:27:02,351 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620613249] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 23:27:02,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278823338] [2022-12-12 23:27:02,351 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-12 23:27:02,351 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:27:02,351 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:27:02,356 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 23:27:02,383 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-12-12 23:27:02,518 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-12 23:27:02,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 23:27:02,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 60 conjunts are in the unsatisfiable core [2022-12-12 23:27:02,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 23:27:02,590 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-12 23:27:02,638 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-12 23:27:02,684 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-12 23:27:02,714 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-12 23:27:03,025 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 23:27:03,026 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 104 treesize of output 56 [2022-12-12 23:27:03,102 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 23:27:03,102 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 23:27:03,769 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 23:27:03,769 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 134 treesize of output 98 [2022-12-12 23:27:03,829 INFO L321 Elim1Store]: treesize reduction 17, result has 67.9 percent of original size [2022-12-12 23:27:03,829 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 1964 treesize of output 1863 [2022-12-12 23:27:03,887 INFO L321 Elim1Store]: treesize reduction 24, result has 54.7 percent of original size [2022-12-12 23:27:03,887 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 1828 treesize of output 1440 [2022-12-12 23:27:03,968 INFO L321 Elim1Store]: treesize reduction 24, result has 54.7 percent of original size [2022-12-12 23:27:03,969 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 1412 treesize of output 1232 [2022-12-12 23:27:04,015 INFO L321 Elim1Store]: treesize reduction 24, result has 54.7 percent of original size [2022-12-12 23:27:04,016 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 938 treesize of output 862 [2022-12-12 23:27:06,858 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 23:27:06,858 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1278823338] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 23:27:06,858 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 23:27:06,858 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 13] total 36 [2022-12-12 23:27:06,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817312664] [2022-12-12 23:27:06,858 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 23:27:06,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-12-12 23:27:06,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:27:06,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-12-12 23:27:06,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=1162, Unknown=7, NotChecked=0, Total=1406 [2022-12-12 23:27:06,859 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 22 [2022-12-12 23:27:06,860 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 800 transitions, 46997 flow. Second operand has 38 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 37 states have internal predecessors, (67), 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 23:27:06,860 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:27:06,860 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 22 [2022-12-12 23:27:06,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:27:16,973 WARN L233 SmtUtils]: Spent 6.06s on a formula simplification that was a NOOP. DAG size: 51 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-12 23:27:29,089 INFO L130 PetriNetUnfolder]: 1906/3207 cut-off events. [2022-12-12 23:27:29,089 INFO L131 PetriNetUnfolder]: For 471/471 co-relation queries the response was YES. [2022-12-12 23:27:29,091 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96879 conditions, 3207 events. 1906/3207 cut-off events. For 471/471 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 18196 event pairs, 6 based on Foata normal form. 2/2582 useless extension candidates. Maximal degree in co-relation 31444. Up to 3207 conditions per place. [2022-12-12 23:27:29,118 INFO L137 encePairwiseOnDemand]: 9/22 looper letters, 1130 selfloop transitions, 351 changer transitions 26/1507 dead transitions. [2022-12-12 23:27:29,119 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 1507 transitions, 91470 flow [2022-12-12 23:27:29,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-12-12 23:27:29,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2022-12-12 23:27:29,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 331 transitions. [2022-12-12 23:27:29,120 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.3498942917547569 [2022-12-12 23:27:29,121 INFO L295 CegarLoopForPetriNet]: 29 programPoint places, 270 predicate places. [2022-12-12 23:27:29,121 INFO L82 GeneralOperation]: Start removeDead. Operand has 299 places, 1507 transitions, 91470 flow [2022-12-12 23:27:29,171 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 297 places, 1481 transitions, 89874 flow [2022-12-12 23:27:29,172 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 1481 transitions, 89874 flow [2022-12-12 23:27:29,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 37 states have internal predecessors, (67), 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 23:27:29,172 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:27:29,172 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:27:29,177 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-12-12 23:27:29,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:27:29,373 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 23:27:29,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:27:29,373 INFO L85 PathProgramCache]: Analyzing trace with hash 1462106359, now seen corresponding path program 3 times [2022-12-12 23:27:29,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:27:29,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276050071] [2022-12-12 23:27:29,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:27:29,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:27:29,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:27:30,336 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 23:27:30,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:27:30,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276050071] [2022-12-12 23:27:30,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276050071] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 23:27:30,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519289039] [2022-12-12 23:27:30,337 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-12 23:27:30,337 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:27:30,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:27:30,340 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 23:27:30,347 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-12-12 23:27:30,497 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-12 23:27:30,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 23:27:30,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 55 conjunts are in the unsatisfiable core [2022-12-12 23:27:30,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 23:27:30,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-12 23:27:30,828 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 24 [2022-12-12 23:27:31,026 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 23:27:31,026 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 23:27:31,493 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 23:27:31,493 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 112 treesize of output 130 [2022-12-12 23:27:31,513 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 23:27:31,513 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 58 treesize of output 64 [2022-12-12 23:27:32,080 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 23:27:32,081 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [519289039] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 23:27:32,081 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 23:27:32,081 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 37 [2022-12-12 23:27:32,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575606602] [2022-12-12 23:27:32,081 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 23:27:32,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-12-12 23:27:32,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:27:32,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-12-12 23:27:32,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=1302, Unknown=3, NotChecked=0, Total=1482 [2022-12-12 23:27:32,082 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 22 [2022-12-12 23:27:32,082 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 1481 transitions, 89874 flow. Second operand has 39 states, 38 states have (on average 1.8157894736842106) internal successors, (69), 38 states have internal predecessors, (69), 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 23:27:32,082 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:27:32,082 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 22 [2022-12-12 23:27:32,082 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:27:41,300 WARN L233 SmtUtils]: Spent 6.64s on a formula simplification. DAG size of input: 114 DAG size of output: 106 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-12 23:27:45,311 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-12 23:27:46,960 INFO L130 PetriNetUnfolder]: 2042/3511 cut-off events. [2022-12-12 23:27:46,960 INFO L131 PetriNetUnfolder]: For 591/591 co-relation queries the response was YES. [2022-12-12 23:27:46,963 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109582 conditions, 3511 events. 2042/3511 cut-off events. For 591/591 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 21090 event pairs, 6 based on Foata normal form. 3/2844 useless extension candidates. Maximal degree in co-relation 34846. Up to 3511 conditions per place. [2022-12-12 23:27:46,996 INFO L137 encePairwiseOnDemand]: 9/22 looper letters, 1316 selfloop transitions, 310 changer transitions 44/1670 dead transitions. [2022-12-12 23:27:46,996 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 1670 transitions, 104758 flow [2022-12-12 23:27:46,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-12-12 23:27:46,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2022-12-12 23:27:46,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 243 transitions. [2022-12-12 23:27:46,997 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.3563049853372434 [2022-12-12 23:27:46,998 INFO L295 CegarLoopForPetriNet]: 29 programPoint places, 298 predicate places. [2022-12-12 23:27:46,998 INFO L82 GeneralOperation]: Start removeDead. Operand has 327 places, 1670 transitions, 104758 flow [2022-12-12 23:27:47,060 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 323 places, 1626 transitions, 101976 flow [2022-12-12 23:27:47,061 INFO L495 AbstractCegarLoop]: Abstraction has has 323 places, 1626 transitions, 101976 flow [2022-12-12 23:27:47,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 1.8157894736842106) internal successors, (69), 38 states have internal predecessors, (69), 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 23:27:47,061 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:27:47,061 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:27:47,066 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-12-12 23:27:47,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:27:47,261 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 23:27:47,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:27:47,262 INFO L85 PathProgramCache]: Analyzing trace with hash -1292205583, now seen corresponding path program 4 times [2022-12-12 23:27:47,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:27:47,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287184599] [2022-12-12 23:27:47,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:27:47,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:27:47,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:27:48,200 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 23:27:48,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:27:48,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287184599] [2022-12-12 23:27:48,202 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287184599] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 23:27:48,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2121700101] [2022-12-12 23:27:48,202 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-12 23:27:48,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:27:48,202 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:27:48,203 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 23:27:48,205 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-12-12 23:27:48,320 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-12 23:27:48,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 23:27:48,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 40 conjunts are in the unsatisfiable core [2022-12-12 23:27:48,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 23:27:48,510 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 23:27:48,510 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 23:27:48,633 INFO L321 Elim1Store]: treesize reduction 23, result has 14.8 percent of original size [2022-12-12 23:27:48,633 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 58 treesize of output 28 [2022-12-12 23:27:48,845 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 23:27:48,845 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2121700101] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 23:27:48,845 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 23:27:48,845 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 8] total 27 [2022-12-12 23:27:48,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795959807] [2022-12-12 23:27:48,845 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 23:27:48,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-12-12 23:27:48,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:27:48,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-12-12 23:27:48,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=630, Unknown=0, NotChecked=0, Total=756 [2022-12-12 23:27:48,847 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 22 [2022-12-12 23:27:48,847 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 323 places, 1626 transitions, 101976 flow. Second operand has 28 states, 27 states have (on average 2.4074074074074074) internal successors, (65), 28 states have internal predecessors, (65), 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 23:27:48,847 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:27:48,847 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 22 [2022-12-12 23:27:48,847 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:27:54,708 INFO L130 PetriNetUnfolder]: 1985/3476 cut-off events. [2022-12-12 23:27:54,709 INFO L131 PetriNetUnfolder]: For 565/565 co-relation queries the response was YES. [2022-12-12 23:27:54,711 INFO L83 FinitePrefix]: Finished finitePrefix Result has 112008 conditions, 3476 events. 1985/3476 cut-off events. For 565/565 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 21321 event pairs, 4 based on Foata normal form. 76/2902 useless extension candidates. Maximal degree in co-relation 35202. Up to 3476 conditions per place. [2022-12-12 23:27:54,742 INFO L137 encePairwiseOnDemand]: 8/22 looper letters, 1104 selfloop transitions, 504 changer transitions 98/1706 dead transitions. [2022-12-12 23:27:54,742 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 357 places, 1706 transitions, 110471 flow [2022-12-12 23:27:54,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-12-12 23:27:54,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2022-12-12 23:27:54,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 274 transitions. [2022-12-12 23:27:54,743 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.35584415584415585 [2022-12-12 23:27:54,744 INFO L295 CegarLoopForPetriNet]: 29 programPoint places, 328 predicate places. [2022-12-12 23:27:54,744 INFO L82 GeneralOperation]: Start removeDead. Operand has 357 places, 1706 transitions, 110471 flow [2022-12-12 23:27:54,805 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 353 places, 1608 transitions, 104094 flow [2022-12-12 23:27:54,806 INFO L495 AbstractCegarLoop]: Abstraction has has 353 places, 1608 transitions, 104094 flow [2022-12-12 23:27:54,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.4074074074074074) internal successors, (65), 28 states have internal predecessors, (65), 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 23:27:54,806 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:27:54,806 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:27:54,815 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-12-12 23:27:55,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2022-12-12 23:27:55,007 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 23:27:55,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:27:55,007 INFO L85 PathProgramCache]: Analyzing trace with hash -880470275, now seen corresponding path program 5 times [2022-12-12 23:27:55,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:27:55,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733165699] [2022-12-12 23:27:55,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:27:55,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:27:55,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:27:56,339 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 23:27:56,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:27:56,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733165699] [2022-12-12 23:27:56,340 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733165699] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 23:27:56,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445811868] [2022-12-12 23:27:56,340 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-12 23:27:56,340 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:27:56,340 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:27:56,344 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 23:27:56,352 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-12-12 23:27:56,520 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-12 23:27:56,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 23:27:56,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 52 conjunts are in the unsatisfiable core [2022-12-12 23:27:56,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 23:27:57,002 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 23:27:57,002 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 23:27:57,226 INFO L321 Elim1Store]: treesize reduction 23, result has 14.8 percent of original size [2022-12-12 23:27:57,227 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 60 treesize of output 30 [2022-12-12 23:27:57,485 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 23:27:57,485 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1445811868] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 23:27:57,485 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 23:27:57,485 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 8] total 32 [2022-12-12 23:27:57,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947384699] [2022-12-12 23:27:57,485 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 23:27:57,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-12-12 23:27:57,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:27:57,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-12-12 23:27:57,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=883, Unknown=0, NotChecked=0, Total=1056 [2022-12-12 23:27:57,486 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 22 [2022-12-12 23:27:57,486 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 353 places, 1608 transitions, 104094 flow. Second operand has 33 states, 32 states have (on average 2.125) internal successors, (68), 33 states have internal predecessors, (68), 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 23:27:57,486 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:27:57,486 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 22 [2022-12-12 23:27:57,486 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:28:02,584 INFO L130 PetriNetUnfolder]: 2128/3711 cut-off events. [2022-12-12 23:28:02,584 INFO L131 PetriNetUnfolder]: For 624/624 co-relation queries the response was YES. [2022-12-12 23:28:02,587 INFO L83 FinitePrefix]: Finished finitePrefix Result has 123289 conditions, 3711 events. 2128/3711 cut-off events. For 624/624 co-relation queries the response was YES. Maximal size of possible extension queue 225. Compared 23092 event pairs, 4 based on Foata normal form. 2/3007 useless extension candidates. Maximal degree in co-relation 39534. Up to 3711 conditions per place. [2022-12-12 23:28:02,620 INFO L137 encePairwiseOnDemand]: 8/22 looper letters, 1339 selfloop transitions, 474 changer transitions 26/1839 dead transitions. [2022-12-12 23:28:02,620 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 382 places, 1839 transitions, 122754 flow [2022-12-12 23:28:02,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-12-12 23:28:02,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2022-12-12 23:28:02,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 236 transitions. [2022-12-12 23:28:02,622 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.3575757575757576 [2022-12-12 23:28:02,623 INFO L295 CegarLoopForPetriNet]: 29 programPoint places, 353 predicate places. [2022-12-12 23:28:02,623 INFO L82 GeneralOperation]: Start removeDead. Operand has 382 places, 1839 transitions, 122754 flow [2022-12-12 23:28:02,687 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 380 places, 1813 transitions, 121002 flow [2022-12-12 23:28:02,687 INFO L495 AbstractCegarLoop]: Abstraction has has 380 places, 1813 transitions, 121002 flow [2022-12-12 23:28:02,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 2.125) internal successors, (68), 33 states have internal predecessors, (68), 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 23:28:02,687 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:28:02,687 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:28:02,693 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-12-12 23:28:02,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2022-12-12 23:28:02,888 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 23:28:02,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:28:02,888 INFO L85 PathProgramCache]: Analyzing trace with hash 1093483787, now seen corresponding path program 6 times [2022-12-12 23:28:02,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:28:02,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685710384] [2022-12-12 23:28:02,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:28:02,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:28:02,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:28:03,838 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 23:28:03,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:28:03,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685710384] [2022-12-12 23:28:03,839 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685710384] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 23:28:03,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222204529] [2022-12-12 23:28:03,839 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-12 23:28:03,839 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:28:03,839 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:28:03,841 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 23:28:03,847 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-12-12 23:28:03,981 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-12-12 23:28:03,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 23:28:03,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 50 conjunts are in the unsatisfiable core [2022-12-12 23:28:03,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 23:28:04,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-12 23:28:04,292 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 24 [2022-12-12 23:28:04,475 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 23:28:04,475 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 23:28:04,807 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 23:28:04,807 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 112 treesize of output 130 [2022-12-12 23:28:04,828 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 23:28:04,828 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 58 treesize of output 64 [2022-12-12 23:28:05,536 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 23:28:05,537 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [222204529] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 23:28:05,537 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 23:28:05,537 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 37 [2022-12-12 23:28:05,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126857918] [2022-12-12 23:28:05,537 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 23:28:05,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-12-12 23:28:05,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:28:05,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-12-12 23:28:05,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=1318, Unknown=1, NotChecked=0, Total=1482 [2022-12-12 23:28:05,538 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 22 [2022-12-12 23:28:05,538 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 380 places, 1813 transitions, 121002 flow. Second operand has 39 states, 38 states have (on average 1.8157894736842106) internal successors, (69), 38 states have internal predecessors, (69), 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 23:28:05,538 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:28:05,538 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 22 [2022-12-12 23:28:05,538 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:28:18,716 WARN L233 SmtUtils]: Spent 8.31s on a formula simplification. DAG size of input: 95 DAG size of output: 83 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-12 23:28:22,214 INFO L130 PetriNetUnfolder]: 2198/3878 cut-off events. [2022-12-12 23:28:22,215 INFO L131 PetriNetUnfolder]: For 630/630 co-relation queries the response was YES. [2022-12-12 23:28:22,218 INFO L83 FinitePrefix]: Finished finitePrefix Result has 132718 conditions, 3878 events. 2198/3878 cut-off events. For 630/630 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 24636 event pairs, 4 based on Foata normal form. 4/3148 useless extension candidates. Maximal degree in co-relation 41342. Up to 3878 conditions per place. [2022-12-12 23:28:22,260 INFO L137 encePairwiseOnDemand]: 9/22 looper letters, 1464 selfloop transitions, 407 changer transitions 57/1928 dead transitions. [2022-12-12 23:28:22,260 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 416 places, 1928 transitions, 132556 flow [2022-12-12 23:28:22,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-12-12 23:28:22,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2022-12-12 23:28:22,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 283 transitions. [2022-12-12 23:28:22,261 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.3476658476658477 [2022-12-12 23:28:22,262 INFO L295 CegarLoopForPetriNet]: 29 programPoint places, 387 predicate places. [2022-12-12 23:28:22,262 INFO L82 GeneralOperation]: Start removeDead. Operand has 416 places, 1928 transitions, 132556 flow [2022-12-12 23:28:22,338 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 412 places, 1871 transitions, 128608 flow [2022-12-12 23:28:22,339 INFO L495 AbstractCegarLoop]: Abstraction has has 412 places, 1871 transitions, 128608 flow [2022-12-12 23:28:22,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 1.8157894736842106) internal successors, (69), 38 states have internal predecessors, (69), 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 23:28:22,339 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:28:22,339 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:28:22,345 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-12-12 23:28:22,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:28:22,540 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 23:28:22,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:28:22,540 INFO L85 PathProgramCache]: Analyzing trace with hash -728566813, now seen corresponding path program 7 times [2022-12-12 23:28:22,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:28:22,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36356652] [2022-12-12 23:28:22,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:28:22,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:28:22,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:28:23,653 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 23:28:23,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:28:23,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36356652] [2022-12-12 23:28:23,654 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36356652] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 23:28:23,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234001280] [2022-12-12 23:28:23,654 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-12 23:28:23,654 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:28:23,654 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:28:23,655 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 23:28:23,657 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-12-12 23:28:23,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:28:23,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 57 conjunts are in the unsatisfiable core [2022-12-12 23:28:23,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 23:28:24,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-12 23:28:24,060 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 24 [2022-12-12 23:28:24,275 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 23:28:24,275 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 23:28:24,581 INFO L321 Elim1Store]: treesize reduction 23, result has 14.8 percent of original size [2022-12-12 23:28:24,582 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 116 treesize of output 86 [2022-12-12 23:28:24,589 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 23:28:24,589 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 42 [2022-12-12 23:28:24,908 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 23:28:24,908 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [234001280] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 23:28:24,908 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 23:28:24,909 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 35 [2022-12-12 23:28:24,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696219743] [2022-12-12 23:28:24,909 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 23:28:24,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-12-12 23:28:24,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:28:24,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-12-12 23:28:24,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=242, Invalid=1089, Unknown=1, NotChecked=0, Total=1332 [2022-12-12 23:28:24,910 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 22 [2022-12-12 23:28:24,910 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 412 places, 1871 transitions, 128608 flow. Second operand has 37 states, 36 states have (on average 1.8611111111111112) internal successors, (67), 36 states have internal predecessors, (67), 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 23:28:24,910 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:28:24,910 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 22 [2022-12-12 23:28:24,910 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:28:35,777 INFO L130 PetriNetUnfolder]: 2191/3858 cut-off events. [2022-12-12 23:28:35,777 INFO L131 PetriNetUnfolder]: For 623/623 co-relation queries the response was YES. [2022-12-12 23:28:35,780 INFO L83 FinitePrefix]: Finished finitePrefix Result has 135892 conditions, 3858 events. 2191/3858 cut-off events. For 623/623 co-relation queries the response was YES. Maximal size of possible extension queue 234. Compared 24498 event pairs, 4 based on Foata normal form. 2/3137 useless extension candidates. Maximal degree in co-relation 42556. Up to 3858 conditions per place. [2022-12-12 23:28:35,821 INFO L137 encePairwiseOnDemand]: 8/22 looper letters, 1414 selfloop transitions, 473 changer transitions 28/1915 dead transitions. [2022-12-12 23:28:35,821 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 446 places, 1915 transitions, 135484 flow [2022-12-12 23:28:35,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-12-12 23:28:35,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2022-12-12 23:28:35,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 254 transitions. [2022-12-12 23:28:35,822 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.32987012987012987 [2022-12-12 23:28:35,823 INFO L295 CegarLoopForPetriNet]: 29 programPoint places, 417 predicate places. [2022-12-12 23:28:35,823 INFO L82 GeneralOperation]: Start removeDead. Operand has 446 places, 1915 transitions, 135484 flow [2022-12-12 23:28:35,897 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 444 places, 1887 transitions, 133488 flow [2022-12-12 23:28:35,897 INFO L495 AbstractCegarLoop]: Abstraction has has 444 places, 1887 transitions, 133488 flow [2022-12-12 23:28:35,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 1.8611111111111112) internal successors, (67), 36 states have internal predecessors, (67), 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 23:28:35,897 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:28:35,898 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:28:35,903 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-12-12 23:28:36,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:28:36,098 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 23:28:36,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:28:36,099 INFO L85 PathProgramCache]: Analyzing trace with hash -456239045, now seen corresponding path program 8 times [2022-12-12 23:28:36,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:28:36,099 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589959676] [2022-12-12 23:28:36,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:28:36,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:28:36,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:28:37,298 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 23:28:37,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:28:37,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589959676] [2022-12-12 23:28:37,299 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589959676] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 23:28:37,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989292387] [2022-12-12 23:28:37,299 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-12 23:28:37,299 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:28:37,299 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:28:37,305 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 23:28:37,311 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-12-12 23:28:37,446 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-12 23:28:37,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 23:28:37,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 57 conjunts are in the unsatisfiable core [2022-12-12 23:28:37,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 23:28:37,525 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-12-12 23:28:37,569 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-12 23:28:37,603 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-12 23:28:37,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-12 23:28:37,811 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 25 [2022-12-12 23:28:37,958 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 23:28:37,959 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 23:28:39,025 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 23:28:39,025 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 131 treesize of output 95 [2022-12-12 23:28:39,077 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 23:28:39,078 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 1240 treesize of output 1175 [2022-12-12 23:28:39,127 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 23:28:39,128 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 1021 treesize of output 984 [2022-12-12 23:28:39,158 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 23:28:39,158 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 1034 treesize of output 896 [2022-12-12 23:28:39,209 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 23:28:39,209 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 870 treesize of output 744 [2022-12-12 23:28:40,499 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 23:28:40,499 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1989292387] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 23:28:40,499 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 23:28:40,499 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 39 [2022-12-12 23:28:40,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987601419] [2022-12-12 23:28:40,499 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 23:28:40,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-12-12 23:28:40,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:28:40,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-12-12 23:28:40,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=1452, Unknown=13, NotChecked=0, Total=1640 [2022-12-12 23:28:40,500 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 22 [2022-12-12 23:28:40,500 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 444 places, 1887 transitions, 133488 flow. Second operand has 41 states, 40 states have (on average 1.725) internal successors, (69), 40 states have internal predecessors, (69), 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 23:28:40,500 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:28:40,500 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 22 [2022-12-12 23:28:40,500 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:28:45,440 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-12 23:28:49,096 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-12 23:29:01,311 WARN L233 SmtUtils]: Spent 11.11s on a formula simplification. DAG size of input: 144 DAG size of output: 129 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-12 23:29:05,185 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-12 23:29:07,221 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-12 23:29:09,378 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-12 23:29:11,421 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-12 23:29:22,062 WARN L233 SmtUtils]: Spent 9.03s on a formula simplification. DAG size of input: 146 DAG size of output: 131 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-12 23:29:25,681 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-12 23:29:26,174 INFO L130 PetriNetUnfolder]: 2221/3940 cut-off events. [2022-12-12 23:29:26,174 INFO L131 PetriNetUnfolder]: For 655/655 co-relation queries the response was YES. [2022-12-12 23:29:26,177 INFO L83 FinitePrefix]: Finished finitePrefix Result has 142728 conditions, 3940 events. 2221/3940 cut-off events. For 655/655 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 25373 event pairs, 4 based on Foata normal form. 2/3208 useless extension candidates. Maximal degree in co-relation 44094. Up to 3940 conditions per place. [2022-12-12 23:29:26,221 INFO L137 encePairwiseOnDemand]: 8/22 looper letters, 1628 selfloop transitions, 324 changer transitions 30/1982 dead transitions. [2022-12-12 23:29:26,221 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 480 places, 1982 transitions, 144201 flow [2022-12-12 23:29:26,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-12-12 23:29:26,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2022-12-12 23:29:26,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 258 transitions. [2022-12-12 23:29:26,222 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.31695331695331697 [2022-12-12 23:29:26,223 INFO L295 CegarLoopForPetriNet]: 29 programPoint places, 451 predicate places. [2022-12-12 23:29:26,223 INFO L82 GeneralOperation]: Start removeDead. Operand has 480 places, 1982 transitions, 144201 flow [2022-12-12 23:29:26,302 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 477 places, 1952 transitions, 142005 flow [2022-12-12 23:29:26,302 INFO L495 AbstractCegarLoop]: Abstraction has has 477 places, 1952 transitions, 142005 flow [2022-12-12 23:29:26,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 40 states have (on average 1.725) internal successors, (69), 40 states have internal predecessors, (69), 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 23:29:26,302 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:29:26,302 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:29:26,307 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-12-12 23:29:26,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:29:26,503 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 23:29:26,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:29:26,503 INFO L85 PathProgramCache]: Analyzing trace with hash 717566039, now seen corresponding path program 9 times [2022-12-12 23:29:26,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:29:26,503 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753450602] [2022-12-12 23:29:26,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:29:26,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:29:26,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:29:27,342 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 23:29:27,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:29:27,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753450602] [2022-12-12 23:29:27,342 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753450602] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 23:29:27,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990276348] [2022-12-12 23:29:27,342 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-12 23:29:27,343 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:29:27,343 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:29:27,344 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 23:29:27,345 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-12-12 23:29:27,484 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-12 23:29:27,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 23:29:27,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 60 conjunts are in the unsatisfiable core [2022-12-12 23:29:27,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 23:29:27,577 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-12-12 23:29:27,617 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-12 23:29:27,650 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-12 23:29:27,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-12 23:29:27,895 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 31 [2022-12-12 23:29:28,005 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 23:29:28,006 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 23:29:29,010 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 23:29:29,011 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 128 treesize of output 92 [2022-12-12 23:29:29,049 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 23:29:29,049 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 2188 treesize of output 2070 [2022-12-12 23:29:29,098 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 23:29:29,098 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 2018 treesize of output 1810 [2022-12-12 23:29:29,181 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 23:29:29,182 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 960 treesize of output 882 [2022-12-12 23:29:29,210 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 23:29:29,211 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 1494 treesize of output 1078 [2022-12-12 23:29:33,746 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 23:29:33,746 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [990276348] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 23:29:33,746 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 23:29:33,746 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 38 [2022-12-12 23:29:33,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671329538] [2022-12-12 23:29:33,747 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 23:29:33,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-12-12 23:29:33,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:29:33,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-12-12 23:29:33,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=1379, Unknown=5, NotChecked=0, Total=1560 [2022-12-12 23:29:33,748 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 22 [2022-12-12 23:29:33,748 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 477 places, 1952 transitions, 142005 flow. Second operand has 40 states, 39 states have (on average 1.7692307692307692) internal successors, (69), 39 states have internal predecessors, (69), 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 23:29:33,748 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:29:33,748 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 22 [2022-12-12 23:29:33,748 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:29:42,706 INFO L130 PetriNetUnfolder]: 2208/3921 cut-off events. [2022-12-12 23:29:42,706 INFO L131 PetriNetUnfolder]: For 628/628 co-relation queries the response was YES. [2022-12-12 23:29:42,709 INFO L83 FinitePrefix]: Finished finitePrefix Result has 145959 conditions, 3921 events. 2208/3921 cut-off events. For 628/628 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 25206 event pairs, 8 based on Foata normal form. 2/3204 useless extension candidates. Maximal degree in co-relation 45835. Up to 3921 conditions per place. [2022-12-12 23:29:42,751 INFO L137 encePairwiseOnDemand]: 8/22 looper letters, 1608 selfloop transitions, 362 changer transitions 35/2005 dead transitions. [2022-12-12 23:29:42,751 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 515 places, 2005 transitions, 149849 flow [2022-12-12 23:29:42,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-12-12 23:29:42,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2022-12-12 23:29:42,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 247 transitions. [2022-12-12 23:29:42,752 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.2878787878787879 [2022-12-12 23:29:42,752 INFO L295 CegarLoopForPetriNet]: 29 programPoint places, 486 predicate places. [2022-12-12 23:29:42,752 INFO L82 GeneralOperation]: Start removeDead. Operand has 515 places, 2005 transitions, 149849 flow [2022-12-12 23:29:42,829 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 507 places, 1970 transitions, 147223 flow [2022-12-12 23:29:42,830 INFO L495 AbstractCegarLoop]: Abstraction has has 507 places, 1970 transitions, 147223 flow [2022-12-12 23:29:42,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 39 states have (on average 1.7692307692307692) internal successors, (69), 39 states have internal predecessors, (69), 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 23:29:42,830 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:29:42,830 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:29:42,835 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-12-12 23:29:43,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-12-12 23:29:43,031 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 23:29:43,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:29:43,031 INFO L85 PathProgramCache]: Analyzing trace with hash 1824389731, now seen corresponding path program 10 times [2022-12-12 23:29:43,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:29:43,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017909645] [2022-12-12 23:29:43,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:29:43,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:29:43,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:29:43,922 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 23:29:43,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:29:43,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017909645] [2022-12-12 23:29:43,922 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1017909645] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 23:29:43,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1826995424] [2022-12-12 23:29:43,922 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-12 23:29:43,922 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:29:43,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:29:43,924 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 23:29:43,925 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-12-12 23:29:44,049 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-12 23:29:44,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 23:29:44,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 57 conjunts are in the unsatisfiable core [2022-12-12 23:29:44,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 23:29:44,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-12 23:29:44,406 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 31 [2022-12-12 23:29:44,535 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 23:29:44,535 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 23:29:44,762 INFO L321 Elim1Store]: treesize reduction 44, result has 17.0 percent of original size [2022-12-12 23:29:44,763 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 87 treesize of output 61 [2022-12-12 23:29:44,774 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 23:29:44,774 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 7 [2022-12-12 23:29:45,116 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 23:29:45,116 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1826995424] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 23:29:45,116 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 23:29:45,116 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 36 [2022-12-12 23:29:45,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153585567] [2022-12-12 23:29:45,116 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 23:29:45,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-12-12 23:29:45,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:29:45,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-12-12 23:29:45,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=240, Invalid=1165, Unknown=1, NotChecked=0, Total=1406 [2022-12-12 23:29:45,118 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 22 [2022-12-12 23:29:45,118 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 507 places, 1970 transitions, 147223 flow. Second operand has 38 states, 37 states have (on average 1.864864864864865) internal successors, (69), 37 states have internal predecessors, (69), 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 23:29:45,118 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:29:45,118 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 22 [2022-12-12 23:29:45,118 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:29:54,870 INFO L130 PetriNetUnfolder]: 2215/3973 cut-off events. [2022-12-12 23:29:54,870 INFO L131 PetriNetUnfolder]: For 667/667 co-relation queries the response was YES. [2022-12-12 23:29:54,875 INFO L83 FinitePrefix]: Finished finitePrefix Result has 151888 conditions, 3973 events. 2215/3973 cut-off events. For 667/667 co-relation queries the response was YES. Maximal size of possible extension queue 236. Compared 25839 event pairs, 4 based on Foata normal form. 8/3287 useless extension candidates. Maximal degree in co-relation 47034. Up to 3973 conditions per place. [2022-12-12 23:29:54,938 INFO L137 encePairwiseOnDemand]: 8/22 looper letters, 1452 selfloop transitions, 460 changer transitions 145/2057 dead transitions. [2022-12-12 23:29:54,938 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 550 places, 2057 transitions, 157889 flow [2022-12-12 23:29:54,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-12-12 23:29:54,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2022-12-12 23:29:54,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 305 transitions. [2022-12-12 23:29:54,940 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.31508264462809915 [2022-12-12 23:29:54,940 INFO L295 CegarLoopForPetriNet]: 29 programPoint places, 521 predicate places. [2022-12-12 23:29:54,940 INFO L82 GeneralOperation]: Start removeDead. Operand has 550 places, 2057 transitions, 157889 flow [2022-12-12 23:29:55,056 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 539 places, 1912 transitions, 146722 flow [2022-12-12 23:29:55,057 INFO L495 AbstractCegarLoop]: Abstraction has has 539 places, 1912 transitions, 146722 flow [2022-12-12 23:29:55,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 1.864864864864865) internal successors, (69), 37 states have internal predecessors, (69), 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 23:29:55,057 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:29:55,057 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:29:55,067 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-12-12 23:29:55,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-12-12 23:29:55,264 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 23:29:55,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:29:55,264 INFO L85 PathProgramCache]: Analyzing trace with hash -18409357, now seen corresponding path program 11 times [2022-12-12 23:29:55,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:29:55,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985036159] [2022-12-12 23:29:55,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:29:55,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:29:55,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:29:56,284 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 23:29:56,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:29:56,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985036159] [2022-12-12 23:29:56,284 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985036159] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 23:29:56,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710941841] [2022-12-12 23:29:56,284 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-12 23:29:56,284 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:29:56,284 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:29:56,285 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 23:29:56,287 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-12-12 23:29:56,415 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-12-12 23:29:56,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 23:29:56,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 42 conjunts are in the unsatisfiable core [2022-12-12 23:29:56,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 23:29:56,613 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 23:29:56,613 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 23:29:56,736 INFO L321 Elim1Store]: treesize reduction 23, result has 14.8 percent of original size [2022-12-12 23:29:56,737 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 58 treesize of output 28 [2022-12-12 23:29:56,953 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 23:29:56,953 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1710941841] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 23:29:56,953 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 23:29:56,953 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 7] total 27 [2022-12-12 23:29:56,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322522733] [2022-12-12 23:29:56,954 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 23:29:56,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-12-12 23:29:56,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:29:56,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-12-12 23:29:56,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=652, Unknown=0, NotChecked=0, Total=756 [2022-12-12 23:29:56,955 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 22 [2022-12-12 23:29:56,955 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 539 places, 1912 transitions, 146722 flow. Second operand has 28 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 28 states have internal predecessors, (68), 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 23:29:56,955 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:29:56,955 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 22 [2022-12-12 23:29:56,955 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:30:02,718 INFO L130 PetriNetUnfolder]: 2762/4710 cut-off events. [2022-12-12 23:30:02,718 INFO L131 PetriNetUnfolder]: For 724/724 co-relation queries the response was YES. [2022-12-12 23:30:02,722 INFO L83 FinitePrefix]: Finished finitePrefix Result has 184720 conditions, 4710 events. 2762/4710 cut-off events. For 724/724 co-relation queries the response was YES. Maximal size of possible extension queue 277. Compared 29658 event pairs, 8 based on Foata normal form. 5/3756 useless extension candidates. Maximal degree in co-relation 61257. Up to 4710 conditions per place. [2022-12-12 23:30:02,781 INFO L137 encePairwiseOnDemand]: 8/22 looper letters, 1636 selfloop transitions, 710 changer transitions 95/2441 dead transitions. [2022-12-12 23:30:02,781 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 575 places, 2441 transitions, 192144 flow [2022-12-12 23:30:02,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-12-12 23:30:02,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2022-12-12 23:30:02,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 269 transitions. [2022-12-12 23:30:02,783 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.33046683046683045 [2022-12-12 23:30:02,783 INFO L295 CegarLoopForPetriNet]: 29 programPoint places, 546 predicate places. [2022-12-12 23:30:02,783 INFO L82 GeneralOperation]: Start removeDead. Operand has 575 places, 2441 transitions, 192144 flow [2022-12-12 23:30:03,014 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 563 places, 2346 transitions, 184662 flow [2022-12-12 23:30:03,015 INFO L495 AbstractCegarLoop]: Abstraction has has 563 places, 2346 transitions, 184662 flow [2022-12-12 23:30:03,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 28 states have internal predecessors, (68), 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 23:30:03,015 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:30:03,015 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:30:03,021 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-12-12 23:30:03,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-12-12 23:30:03,220 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 23:30:03,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:30:03,220 INFO L85 PathProgramCache]: Analyzing trace with hash 1179587907, now seen corresponding path program 12 times [2022-12-12 23:30:03,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:30:03,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111974667] [2022-12-12 23:30:03,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:30:03,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:30:03,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:30:04,217 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 23:30:04,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:30:04,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111974667] [2022-12-12 23:30:04,217 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111974667] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 23:30:04,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304472512] [2022-12-12 23:30:04,217 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-12 23:30:04,218 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:30:04,218 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:30:04,223 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 23:30:04,225 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-12-12 23:30:04,375 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-12-12 23:30:04,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 23:30:04,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 42 conjunts are in the unsatisfiable core [2022-12-12 23:30:04,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 23:30:04,607 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 23:30:04,607 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 23:30:04,783 INFO L321 Elim1Store]: treesize reduction 44, result has 17.0 percent of original size [2022-12-12 23:30:04,783 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 60 treesize of output 34 [2022-12-12 23:30:04,931 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 23:30:04,931 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [304472512] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 23:30:04,932 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 23:30:04,932 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 8] total 28 [2022-12-12 23:30:04,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055397642] [2022-12-12 23:30:04,932 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 23:30:04,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-12-12 23:30:04,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:30:04,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-12-12 23:30:04,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=670, Unknown=0, NotChecked=0, Total=812 [2022-12-12 23:30:04,933 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 22 [2022-12-12 23:30:04,933 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 563 places, 2346 transitions, 184662 flow. Second operand has 29 states, 28 states have (on average 2.4285714285714284) internal successors, (68), 29 states have internal predecessors, (68), 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 23:30:04,933 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:30:04,933 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 22 [2022-12-12 23:30:04,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:30:08,472 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-12 23:30:11,243 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-12 23:30:16,855 INFO L130 PetriNetUnfolder]: 3474/5895 cut-off events. [2022-12-12 23:30:16,855 INFO L131 PetriNetUnfolder]: For 946/946 co-relation queries the response was YES. [2022-12-12 23:30:16,859 INFO L83 FinitePrefix]: Finished finitePrefix Result has 237088 conditions, 5895 events. 3474/5895 cut-off events. For 946/946 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 38795 event pairs, 4 based on Foata normal form. 3/4593 useless extension candidates. Maximal degree in co-relation 76226. Up to 5895 conditions per place. [2022-12-12 23:30:16,930 INFO L137 encePairwiseOnDemand]: 8/22 looper letters, 1998 selfloop transitions, 981 changer transitions 49/3028 dead transitions. [2022-12-12 23:30:16,930 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 603 places, 3028 transitions, 244487 flow [2022-12-12 23:30:16,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-12-12 23:30:16,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2022-12-12 23:30:16,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 300 transitions. [2022-12-12 23:30:16,931 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.3325942350332594 [2022-12-12 23:30:16,932 INFO L295 CegarLoopForPetriNet]: 29 programPoint places, 574 predicate places. [2022-12-12 23:30:16,932 INFO L82 GeneralOperation]: Start removeDead. Operand has 603 places, 3028 transitions, 244487 flow [2022-12-12 23:30:17,072 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 601 places, 2979 transitions, 240504 flow [2022-12-12 23:30:17,072 INFO L495 AbstractCegarLoop]: Abstraction has has 601 places, 2979 transitions, 240504 flow [2022-12-12 23:30:17,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.4285714285714284) internal successors, (68), 29 states have internal predecessors, (68), 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 23:30:17,072 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:30:17,072 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:30:17,077 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-12-12 23:30:17,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-12-12 23:30:17,273 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 23:30:17,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:30:17,273 INFO L85 PathProgramCache]: Analyzing trace with hash -507417533, now seen corresponding path program 13 times [2022-12-12 23:30:17,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:30:17,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406597514] [2022-12-12 23:30:17,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:30:17,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:30:17,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:30:18,817 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 23:30:18,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:30:18,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406597514] [2022-12-12 23:30:18,817 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406597514] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 23:30:18,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940110553] [2022-12-12 23:30:18,817 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-12 23:30:18,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:30:18,817 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:30:18,818 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 23:30:18,820 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-12-12 23:30:18,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:30:18,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 44 conjunts are in the unsatisfiable core [2022-12-12 23:30:18,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 23:30:19,392 INFO L321 Elim1Store]: treesize reduction 58, result has 10.8 percent of original size [2022-12-12 23:30:19,392 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 82 treesize of output 38 [2022-12-12 23:30:19,418 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 23:30:19,419 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 23:30:19,716 INFO L321 Elim1Store]: treesize reduction 12, result has 81.5 percent of original size [2022-12-12 23:30:19,717 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 59 treesize of output 78 [2022-12-12 23:30:20,834 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 23:30:20,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [940110553] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 23:30:20,834 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 23:30:20,834 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 11] total 35 [2022-12-12 23:30:20,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770473073] [2022-12-12 23:30:20,834 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 23:30:20,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-12-12 23:30:20,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:30:20,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-12-12 23:30:20,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=1151, Unknown=0, NotChecked=0, Total=1332 [2022-12-12 23:30:20,835 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 22 [2022-12-12 23:30:20,835 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 601 places, 2979 transitions, 240504 flow. Second operand has 37 states, 36 states have (on average 1.9166666666666667) internal successors, (69), 36 states have internal predecessors, (69), 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 23:30:20,835 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:30:20,835 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 22 [2022-12-12 23:30:20,835 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:30:25,447 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-12 23:30:29,799 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-12 23:30:31,924 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-12 23:30:45,318 INFO L130 PetriNetUnfolder]: 3766/6465 cut-off events. [2022-12-12 23:30:45,318 INFO L131 PetriNetUnfolder]: For 1067/1067 co-relation queries the response was YES. [2022-12-12 23:30:45,323 INFO L83 FinitePrefix]: Finished finitePrefix Result has 266501 conditions, 6465 events. 3766/6465 cut-off events. For 1067/1067 co-relation queries the response was YES. Maximal size of possible extension queue 391. Compared 44079 event pairs, 4 based on Foata normal form. 2/5037 useless extension candidates. Maximal degree in co-relation 89436. Up to 6465 conditions per place. [2022-12-12 23:30:45,401 INFO L137 encePairwiseOnDemand]: 8/22 looper letters, 2950 selfloop transitions, 333 changer transitions 33/3316 dead transitions. [2022-12-12 23:30:45,401 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 635 places, 3316 transitions, 274447 flow [2022-12-12 23:30:45,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-12-12 23:30:45,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2022-12-12 23:30:45,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 251 transitions. [2022-12-12 23:30:45,402 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.32597402597402597 [2022-12-12 23:30:45,402 INFO L295 CegarLoopForPetriNet]: 29 programPoint places, 606 predicate places. [2022-12-12 23:30:45,403 INFO L82 GeneralOperation]: Start removeDead. Operand has 635 places, 3316 transitions, 274447 flow [2022-12-12 23:30:45,555 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 633 places, 3283 transitions, 271696 flow [2022-12-12 23:30:45,555 INFO L495 AbstractCegarLoop]: Abstraction has has 633 places, 3283 transitions, 271696 flow [2022-12-12 23:30:45,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 1.9166666666666667) internal successors, (69), 36 states have internal predecessors, (69), 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 23:30:45,556 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:30:45,556 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:30:45,561 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-12-12 23:30:45,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-12-12 23:30:45,756 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 23:30:45,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:30:45,757 INFO L85 PathProgramCache]: Analyzing trace with hash -539375995, now seen corresponding path program 14 times [2022-12-12 23:30:45,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:30:45,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084642560] [2022-12-12 23:30:45,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:30:45,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:30:45,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:30:46,954 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 23:30:46,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:30:46,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084642560] [2022-12-12 23:30:46,955 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084642560] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 23:30:46,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487820966] [2022-12-12 23:30:46,955 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-12 23:30:46,955 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:30:46,955 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:30:46,956 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 23:30:46,958 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-12-12 23:30:47,113 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-12 23:30:47,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 23:30:47,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 62 conjunts are in the unsatisfiable core [2022-12-12 23:30:47,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 23:30:47,191 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-12-12 23:30:47,229 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-12 23:30:47,261 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-12 23:30:47,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-12 23:30:47,439 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 25 [2022-12-12 23:30:47,595 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 23:30:47,595 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 23:30:48,492 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 23:30:48,492 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 131 treesize of output 95 [2022-12-12 23:30:48,513 INFO L321 Elim1Store]: treesize reduction 23, result has 14.8 percent of original size [2022-12-12 23:30:48,513 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 2500 treesize of output 2270 [2022-12-12 23:30:48,531 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 23:30:48,531 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 2266 treesize of output 1938 [2022-12-12 23:30:48,551 INFO L321 Elim1Store]: treesize reduction 23, result has 14.8 percent of original size [2022-12-12 23:30:48,551 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 1938 treesize of output 1586 [2022-12-12 23:30:48,577 INFO L321 Elim1Store]: treesize reduction 23, result has 14.8 percent of original size [2022-12-12 23:30:48,578 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 1451 treesize of output 1277 [2022-12-12 23:30:49,135 INFO L208 tifierPushTermWalker]: Run 10 iterations without descend maybe there is a nontermination bug. [2022-12-12 23:30:49,272 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 23:30:49,273 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [487820966] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 23:30:49,273 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 23:30:49,273 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 37 [2022-12-12 23:30:49,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699778864] [2022-12-12 23:30:49,273 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 23:30:49,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-12-12 23:30:49,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:30:49,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-12-12 23:30:49,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=1222, Unknown=16, NotChecked=0, Total=1482 [2022-12-12 23:30:49,274 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 22 [2022-12-12 23:30:49,274 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 633 places, 3283 transitions, 271696 flow. Second operand has 39 states, 38 states have (on average 1.763157894736842) internal successors, (67), 38 states have internal predecessors, (67), 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 23:30:49,274 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:30:49,274 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 22 [2022-12-12 23:30:49,274 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:30:55,997 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-12 23:30:58,043 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-12 23:31:19,472 WARN L233 SmtUtils]: Spent 8.39s on a formula simplification that was a NOOP. DAG size: 105 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-12 23:31:21,621 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-12 23:31:32,555 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-12 23:31:33,733 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-12 23:31:37,485 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-12 23:31:40,583 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-12 23:31:42,961 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-12 23:31:48,817 WARN L233 SmtUtils]: Spent 5.23s on a formula simplification that was a NOOP. DAG size: 94 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-12 23:31:55,990 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-12 23:31:58,249 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-12 23:32:00,271 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-12 23:32:10,953 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-12 23:32:12,017 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-12 23:32:14,026 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-12 23:32:15,399 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.37s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-12 23:32:17,452 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-12 23:32:19,715 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-12 23:32:21,958 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-12 23:32:26,391 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-12 23:32:36,014 WARN L233 SmtUtils]: Spent 7.76s on a formula simplification that was a NOOP. DAG size: 116 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-12 23:32:49,416 WARN L233 SmtUtils]: Spent 13.10s on a formula simplification that was a NOOP. DAG size: 120 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-12 23:33:00,720 WARN L233 SmtUtils]: Spent 8.90s on a formula simplification that was a NOOP. DAG size: 105 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-12 23:33:02,987 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-12 23:33:04,993 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-12 23:33:09,148 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-12 23:33:11,166 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-12 23:33:13,180 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-12 23:33:14,883 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.53s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-12 23:33:16,889 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-12 23:33:19,664 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-12 23:33:26,102 WARN L233 SmtUtils]: Spent 6.29s on a formula simplification that was a NOOP. DAG size: 109 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-12 23:33:37,589 WARN L233 SmtUtils]: Spent 10.22s on a formula simplification that was a NOOP. DAG size: 122 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-12 23:33:39,712 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-12 23:33:46,276 INFO L130 PetriNetUnfolder]: 3965/6843 cut-off events. [2022-12-12 23:33:46,276 INFO L131 PetriNetUnfolder]: For 1127/1127 co-relation queries the response was YES. [2022-12-12 23:33:46,281 INFO L83 FinitePrefix]: Finished finitePrefix Result has 288933 conditions, 6843 events. 3965/6843 cut-off events. For 1127/1127 co-relation queries the response was YES. Maximal size of possible extension queue 418. Compared 47501 event pairs, 8 based on Foata normal form. 3/5316 useless extension candidates. Maximal degree in co-relation 98107. Up to 6843 conditions per place. [2022-12-12 23:33:46,363 INFO L137 encePairwiseOnDemand]: 8/22 looper letters, 2708 selfloop transitions, 747 changer transitions 42/3497 dead transitions. [2022-12-12 23:33:46,363 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 683 places, 3497 transitions, 296448 flow [2022-12-12 23:33:46,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-12-12 23:33:46,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2022-12-12 23:33:46,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 311 transitions. [2022-12-12 23:33:46,364 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.27718360071301246 [2022-12-12 23:33:46,364 INFO L295 CegarLoopForPetriNet]: 29 programPoint places, 654 predicate places. [2022-12-12 23:33:46,365 INFO L82 GeneralOperation]: Start removeDead. Operand has 683 places, 3497 transitions, 296448 flow [2022-12-12 23:33:46,531 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 680 places, 3455 transitions, 292866 flow [2022-12-12 23:33:46,531 INFO L495 AbstractCegarLoop]: Abstraction has has 680 places, 3455 transitions, 292866 flow [2022-12-12 23:33:46,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 1.763157894736842) internal successors, (67), 38 states have internal predecessors, (67), 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 23:33:46,532 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:33:46,532 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:33:46,537 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-12-12 23:33:46,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:33:46,732 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 23:33:46,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:33:46,733 INFO L85 PathProgramCache]: Analyzing trace with hash -2116825083, now seen corresponding path program 15 times [2022-12-12 23:33:46,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:33:46,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254043555] [2022-12-12 23:33:46,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:33:46,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:33:46,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:33:47,805 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 23:33:47,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:33:47,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254043555] [2022-12-12 23:33:47,806 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254043555] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 23:33:47,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [711019068] [2022-12-12 23:33:47,806 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-12 23:33:47,806 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:33:47,806 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:33:47,807 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 23:33:47,809 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-12-12 23:33:47,979 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-12 23:33:47,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 23:33:47,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 50 conjunts are in the unsatisfiable core [2022-12-12 23:33:47,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 23:33:48,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-12 23:33:48,301 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 31 [2022-12-12 23:33:48,406 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 23:33:48,406 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 23:33:48,677 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 23:33:48,678 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 87 treesize of output 105 [2022-12-12 23:33:48,683 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 23:33:48,683 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 7 [2022-12-12 23:33:49,267 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 23:33:49,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [711019068] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 23:33:49,267 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 23:33:49,267 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 35 [2022-12-12 23:33:49,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313739351] [2022-12-12 23:33:49,267 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 23:33:49,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-12-12 23:33:49,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:33:49,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-12-12 23:33:49,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=1183, Unknown=1, NotChecked=0, Total=1332 [2022-12-12 23:33:49,271 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 22 [2022-12-12 23:33:49,271 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 680 places, 3455 transitions, 292866 flow. Second operand has 37 states, 36 states have (on average 1.9166666666666667) internal successors, (69), 36 states have internal predecessors, (69), 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 23:33:49,271 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:33:49,271 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 22 [2022-12-12 23:33:49,271 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:34:01,572 INFO L130 PetriNetUnfolder]: 3967/6860 cut-off events. [2022-12-12 23:34:01,573 INFO L131 PetriNetUnfolder]: For 1137/1137 co-relation queries the response was YES. [2022-12-12 23:34:01,577 INFO L83 FinitePrefix]: Finished finitePrefix Result has 296515 conditions, 6860 events. 3967/6860 cut-off events. For 1137/1137 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 47695 event pairs, 8 based on Foata normal form. 4/5336 useless extension candidates. Maximal degree in co-relation 99824. Up to 6860 conditions per place. [2022-12-12 23:34:01,657 INFO L137 encePairwiseOnDemand]: 8/22 looper letters, 2824 selfloop transitions, 626 changer transitions 62/3512 dead transitions. [2022-12-12 23:34:01,658 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 711 places, 3512 transitions, 304747 flow [2022-12-12 23:34:01,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-12-12 23:34:01,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2022-12-12 23:34:01,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 239 transitions. [2022-12-12 23:34:01,659 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.33948863636363635 [2022-12-12 23:34:01,659 INFO L295 CegarLoopForPetriNet]: 29 programPoint places, 682 predicate places. [2022-12-12 23:34:01,660 INFO L82 GeneralOperation]: Start removeDead. Operand has 711 places, 3512 transitions, 304747 flow [2022-12-12 23:34:01,833 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 702 places, 3450 transitions, 299343 flow [2022-12-12 23:34:01,833 INFO L495 AbstractCegarLoop]: Abstraction has has 702 places, 3450 transitions, 299343 flow [2022-12-12 23:34:01,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 1.9166666666666667) internal successors, (69), 36 states have internal predecessors, (69), 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 23:34:01,834 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:34:01,834 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:34:01,839 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-12-12 23:34:02,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:34:02,035 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 23:34:02,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:34:02,035 INFO L85 PathProgramCache]: Analyzing trace with hash 1123173457, now seen corresponding path program 16 times [2022-12-12 23:34:02,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:34:02,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360080854] [2022-12-12 23:34:02,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:34:02,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:34:02,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:34:02,914 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 23:34:02,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:34:02,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360080854] [2022-12-12 23:34:02,914 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360080854] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 23:34:02,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349461668] [2022-12-12 23:34:02,914 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-12 23:34:02,914 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:34:02,914 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:34:02,915 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 23:34:02,917 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-12-12 23:34:03,055 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-12 23:34:03,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 23:34:03,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 47 conjunts are in the unsatisfiable core [2022-12-12 23:34:03,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 23:34:03,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-12 23:34:03,307 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 31 [2022-12-12 23:34:03,387 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 23:34:03,388 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 23:34:03,632 INFO L321 Elim1Store]: treesize reduction 44, result has 17.0 percent of original size [2022-12-12 23:34:03,632 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 89 treesize of output 63 [2022-12-12 23:34:03,636 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 23:34:03,636 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 7 [2022-12-12 23:34:03,831 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 23:34:03,831 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [349461668] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 23:34:03,831 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 23:34:03,831 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 10] total 33 [2022-12-12 23:34:03,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262287554] [2022-12-12 23:34:03,831 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 23:34:03,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-12-12 23:34:03,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:34:03,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-12-12 23:34:03,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=1007, Unknown=1, NotChecked=0, Total=1190 [2022-12-12 23:34:03,832 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 22 [2022-12-12 23:34:03,833 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 702 places, 3450 transitions, 299343 flow. Second operand has 35 states, 34 states have (on average 2.0) internal successors, (68), 34 states have internal predecessors, (68), 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 23:34:03,833 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:34:03,833 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 22 [2022-12-12 23:34:03,833 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:34:08,057 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-12 23:34:19,498 INFO L130 PetriNetUnfolder]: 4077/7063 cut-off events. [2022-12-12 23:34:19,499 INFO L131 PetriNetUnfolder]: For 1221/1221 co-relation queries the response was YES. [2022-12-12 23:34:19,504 INFO L83 FinitePrefix]: Finished finitePrefix Result has 312368 conditions, 7063 events. 4077/7063 cut-off events. For 1221/1221 co-relation queries the response was YES. Maximal size of possible extension queue 427. Compared 49505 event pairs, 8 based on Foata normal form. 6/5508 useless extension candidates. Maximal degree in co-relation 105015. Up to 7063 conditions per place. [2022-12-12 23:34:19,592 INFO L137 encePairwiseOnDemand]: 8/22 looper letters, 2512 selfloop transitions, 985 changer transitions 124/3621 dead transitions. [2022-12-12 23:34:19,593 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 744 places, 3621 transitions, 321495 flow [2022-12-12 23:34:19,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-12-12 23:34:19,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2022-12-12 23:34:19,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 312 transitions. [2022-12-12 23:34:19,594 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.3298097251585624 [2022-12-12 23:34:19,595 INFO L295 CegarLoopForPetriNet]: 29 programPoint places, 715 predicate places. [2022-12-12 23:34:19,595 INFO L82 GeneralOperation]: Start removeDead. Operand has 744 places, 3621 transitions, 321495 flow [2022-12-12 23:34:19,784 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 736 places, 3497 transitions, 310448 flow [2022-12-12 23:34:19,784 INFO L495 AbstractCegarLoop]: Abstraction has has 736 places, 3497 transitions, 310448 flow [2022-12-12 23:34:19,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 2.0) internal successors, (68), 34 states have internal predecessors, (68), 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 23:34:19,784 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:34:19,784 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:34:19,789 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2022-12-12 23:34:19,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:34:19,985 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 23:34:19,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:34:19,985 INFO L85 PathProgramCache]: Analyzing trace with hash 1447236269, now seen corresponding path program 17 times [2022-12-12 23:34:19,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:34:19,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375285004] [2022-12-12 23:34:19,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:34:19,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:34:20,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:34:21,180 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 23:34:21,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:34:21,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375285004] [2022-12-12 23:34:21,180 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375285004] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 23:34:21,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [743745687] [2022-12-12 23:34:21,181 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-12 23:34:21,181 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:34:21,181 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:34:21,182 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 23:34:21,183 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-12-12 23:34:21,334 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-12-12 23:34:21,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 23:34:21,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 47 conjunts are in the unsatisfiable core [2022-12-12 23:34:21,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 23:34:21,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-12 23:34:21,546 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 24 [2022-12-12 23:34:21,662 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 23:34:21,662 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 23:34:21,878 INFO L321 Elim1Store]: treesize reduction 44, result has 17.0 percent of original size [2022-12-12 23:34:21,878 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 112 treesize of output 86 [2022-12-12 23:34:21,890 INFO L321 Elim1Store]: treesize reduction 23, result has 14.8 percent of original size [2022-12-12 23:34:21,891 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 58 treesize of output 42 [2022-12-12 23:34:22,124 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 23:34:22,124 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [743745687] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 23:34:22,124 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 23:34:22,124 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 9] total 34 [2022-12-12 23:34:22,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181034473] [2022-12-12 23:34:22,125 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 23:34:22,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-12-12 23:34:22,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:34:22,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-12-12 23:34:22,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=1073, Unknown=1, NotChecked=0, Total=1260 [2022-12-12 23:34:22,125 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 22 [2022-12-12 23:34:22,126 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 736 places, 3497 transitions, 310448 flow. Second operand has 36 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 35 states have internal predecessors, (68), 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 23:34:22,126 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:34:22,126 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 22 [2022-12-12 23:34:22,126 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:34:29,950 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-12 23:34:37,965 INFO L130 PetriNetUnfolder]: 4024/6934 cut-off events. [2022-12-12 23:34:37,965 INFO L131 PetriNetUnfolder]: For 1207/1207 co-relation queries the response was YES. [2022-12-12 23:34:37,971 INFO L83 FinitePrefix]: Finished finitePrefix Result has 313606 conditions, 6934 events. 4024/6934 cut-off events. For 1207/1207 co-relation queries the response was YES. Maximal size of possible extension queue 418. Compared 48195 event pairs, 8 based on Foata normal form. 5/5440 useless extension candidates. Maximal degree in co-relation 104905. Up to 6934 conditions per place. [2022-12-12 23:34:38,064 INFO L137 encePairwiseOnDemand]: 8/22 looper letters, 2592 selfloop transitions, 895 changer transitions 73/3560 dead transitions. [2022-12-12 23:34:38,064 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 773 places, 3560 transitions, 323196 flow [2022-12-12 23:34:38,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-12-12 23:34:38,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2022-12-12 23:34:38,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 259 transitions. [2022-12-12 23:34:38,066 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.30980861244019137 [2022-12-12 23:34:38,067 INFO L295 CegarLoopForPetriNet]: 29 programPoint places, 744 predicate places. [2022-12-12 23:34:38,067 INFO L82 GeneralOperation]: Start removeDead. Operand has 773 places, 3560 transitions, 323196 flow [2022-12-12 23:34:38,431 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 769 places, 3487 transitions, 316536 flow [2022-12-12 23:34:38,432 INFO L495 AbstractCegarLoop]: Abstraction has has 769 places, 3487 transitions, 316536 flow [2022-12-12 23:34:38,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 35 states have internal predecessors, (68), 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 23:34:38,432 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:34:38,432 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:34:38,437 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-12-12 23:34:38,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2022-12-12 23:34:38,633 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 23:34:38,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:34:38,633 INFO L85 PathProgramCache]: Analyzing trace with hash 2033172553, now seen corresponding path program 18 times [2022-12-12 23:34:38,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:34:38,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120576969] [2022-12-12 23:34:38,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:34:38,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:34:38,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:34:39,795 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 23:34:39,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:34:39,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120576969] [2022-12-12 23:34:39,795 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120576969] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 23:34:39,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607312849] [2022-12-12 23:34:39,795 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-12 23:34:39,795 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:34:39,795 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:34:39,800 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 23:34:39,804 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-12-12 23:34:39,985 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-12-12 23:34:39,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 23:34:39,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 65 conjunts are in the unsatisfiable core [2022-12-12 23:34:39,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 23:34:40,076 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-12 23:34:40,115 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-12 23:34:40,153 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-12 23:34:40,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-12 23:34:40,356 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 25 [2022-12-12 23:34:40,600 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 23:34:40,600 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 23:34:41,440 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 23:34:41,440 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 131 treesize of output 95 [2022-12-12 23:34:41,481 INFO L321 Elim1Store]: treesize reduction 44, result has 17.0 percent of original size [2022-12-12 23:34:41,482 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 2500 treesize of output 2274 [2022-12-12 23:34:41,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-12 23:34:41,507 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-12 23:34:41,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-12 23:34:41,509 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 2057 treesize of output 1879 [2022-12-12 23:34:41,553 INFO L321 Elim1Store]: treesize reduction 44, result has 17.0 percent of original size [2022-12-12 23:34:41,554 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 2088 treesize of output 1740 [2022-12-12 23:34:41,591 INFO L321 Elim1Store]: treesize reduction 23, result has 14.8 percent of original size [2022-12-12 23:34:41,592 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 1732 treesize of output 1408 [2022-12-12 23:34:42,042 INFO L208 tifierPushTermWalker]: Run 10 iterations without descend maybe there is a nontermination bug. [2022-12-12 23:34:42,147 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 23:34:42,147 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [607312849] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 23:34:42,147 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 23:34:42,147 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 38 [2022-12-12 23:34:42,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369908190] [2022-12-12 23:34:42,148 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 23:34:42,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-12-12 23:34:42,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:34:42,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-12-12 23:34:42,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=1269, Unknown=13, NotChecked=0, Total=1560 [2022-12-12 23:34:42,149 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 22 [2022-12-12 23:34:42,149 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 769 places, 3487 transitions, 316536 flow. Second operand has 40 states, 39 states have (on average 1.7692307692307692) internal successors, (69), 39 states have internal predecessors, (69), 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 23:34:42,149 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:34:42,149 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 22 [2022-12-12 23:34:42,149 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:34:48,343 WARN L233 SmtUtils]: Spent 6.14s on a formula simplification. DAG size of input: 77 DAG size of output: 73 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-12 23:35:17,529 WARN L233 SmtUtils]: Spent 12.38s on a formula simplification that was a NOOP. DAG size: 108 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-12 23:35:20,156 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-12 23:35:21,258 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-12 23:35:27,943 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-12 23:35:29,549 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.60s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-12 23:35:33,412 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.62s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-12 23:35:35,420 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-12 23:35:38,092 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-12 23:36:03,138 WARN L233 SmtUtils]: Spent 15.56s on a formula simplification that was a NOOP. DAG size: 119 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-12 23:36:05,323 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-12 23:36:06,734 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.41s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-12 23:36:08,742 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-12 23:36:20,042 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-12 23:36:24,135 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-12 23:36:26,156 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-12 23:36:28,164 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-12 23:36:29,566 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.37s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-12 23:36:45,649 WARN L233 SmtUtils]: Spent 15.68s on a formula simplification that was a NOOP. DAG size: 125 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-12 23:36:47,740 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-12 23:37:26,635 WARN L233 SmtUtils]: Spent 38.76s on a formula simplification. DAG size of input: 162 DAG size of output: 156 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-12 23:37:28,660 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-12 23:37:31,323 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-12 23:37:44,313 WARN L233 SmtUtils]: Spent 12.48s on a formula simplification that was a NOOP. DAG size: 125 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-12 23:38:03,572 WARN L233 SmtUtils]: Spent 9.75s on a formula simplification that was a NOOP. DAG size: 105 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-12 23:38:05,010 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.42s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-12 23:38:07,017 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-12 23:38:09,033 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-12 23:38:11,281 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-12 23:38:13,348 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-12 23:38:15,870 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-12 23:38:17,196 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-12 23:38:19,916 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-12 23:38:21,947 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-12 23:38:23,983 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-12 23:38:37,055 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-12 23:38:39,067 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-12 23:38:42,642 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-12 23:38:53,964 WARN L233 SmtUtils]: Spent 10.97s on a formula simplification that was a NOOP. DAG size: 131 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) Received shutdown request... [2022-12-12 23:38:57,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-12-12 23:38:57,448 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 4 remaining) [2022-12-12 23:38:57,455 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-12-12 23:38:57,457 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-12-12 23:38:57,459 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 23:38:57,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2022-12-12 23:38:57,648 WARN L619 AbstractCegarLoop]: Verification canceled: while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (40states, 0/22 universal loopers) in iteration 45,while PetriNetUnfolder was constructing finite prefix that currently has 272924 conditions, 5903 events (3506/5902 cut-off events. For 985/985 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 41730 event pairs, 6 based on Foata normal form. 0/4770 useless extension candidates. Maximal degree in co-relation 103330. Up to 5902 conditions per place.). [2022-12-12 23:38:57,650 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 4 remaining) [2022-12-12 23:38:57,650 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2022-12-12 23:38:57,650 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2022-12-12 23:38:57,650 INFO L445 BasicCegarLoop]: Path program histogram: [20, 18, 3, 3, 1] [2022-12-12 23:38:57,652 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-12-12 23:38:57,652 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-12-12 23:38:57,654 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.12 11:38:57 BasicIcfg [2022-12-12 23:38:57,654 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-12-12 23:38:57,655 INFO L158 Benchmark]: Toolchain (without parser) took 808384.78ms. Allocated memory was 210.8MB in the beginning and 2.2GB in the end (delta: 2.0GB). Free memory was 169.5MB in the beginning and 1.3GB in the end (delta: -1.1GB). Peak memory consumption was 1.8GB. Max. memory is 8.0GB. [2022-12-12 23:38:57,655 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 210.8MB. Free memory was 186.8MB in the beginning and 186.7MB in the end (delta: 90.6kB). There was no memory consumed. Max. memory is 8.0GB. [2022-12-12 23:38:57,655 INFO L158 Benchmark]: CACSL2BoogieTranslator took 299.44ms. Allocated memory is still 210.8MB. Free memory was 169.0MB in the beginning and 156.4MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. [2022-12-12 23:38:57,655 INFO L158 Benchmark]: Boogie Procedure Inliner took 62.67ms. Allocated memory is still 210.8MB. Free memory was 156.4MB in the beginning and 154.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-12-12 23:38:57,655 INFO L158 Benchmark]: Boogie Preprocessor took 43.86ms. Allocated memory is still 210.8MB. Free memory was 154.3MB in the beginning and 152.7MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-12-12 23:38:57,655 INFO L158 Benchmark]: RCFGBuilder took 662.15ms. Allocated memory is still 210.8MB. Free memory was 152.7MB in the beginning and 126.5MB in the end (delta: 26.2MB). Peak memory consumption was 26.2MB. Max. memory is 8.0GB. [2022-12-12 23:38:57,656 INFO L158 Benchmark]: TraceAbstraction took 807294.64ms. Allocated memory was 210.8MB in the beginning and 2.2GB in the end (delta: 2.0GB). Free memory was 124.9MB in the beginning and 1.3GB in the end (delta: -1.1GB). Peak memory consumption was 1.8GB. Max. memory is 8.0GB. [2022-12-12 23:38:57,657 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 210.8MB. Free memory was 186.8MB in the beginning and 186.7MB in the end (delta: 90.6kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 299.44ms. Allocated memory is still 210.8MB. Free memory was 169.0MB in the beginning and 156.4MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 62.67ms. Allocated memory is still 210.8MB. Free memory was 156.4MB in the beginning and 154.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 43.86ms. Allocated memory is still 210.8MB. Free memory was 154.3MB in the beginning and 152.7MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 662.15ms. Allocated memory is still 210.8MB. Free memory was 152.7MB in the beginning and 126.5MB in the end (delta: 26.2MB). Peak memory consumption was 26.2MB. Max. memory is 8.0GB. * TraceAbstraction took 807294.64ms. Allocated memory was 210.8MB in the beginning and 2.2GB in the end (delta: 2.0GB). Free memory was 124.9MB in the beginning and 1.3GB in the end (delta: -1.1GB). Peak memory consumption was 1.8GB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 4.6s, 132 PlacesBefore, 29 PlacesAfterwards, 131 TransitionsBefore, 22 TransitionsAfterwards, 1464 CoEnabledTransitionPairs, 3 FixpointIterations, 0 TrivialSequentialCompositions, 0 ConcurrentSequentialCompositions, 68 TrivialYvCompositions, 35 ConcurrentYvCompositions, 6 ChoiceCompositions, 109 TotalNumberOfCompositions, Independence Relation Statistics: ConditionTransformingIndependenceRelation.Independence Queries: [ total: 748, independent: 743, independent conditional: 743, independent unconditional: 0, dependent: 5, dependent conditional: 5, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ConditionTransformingIndependenceRelation.Statistics on underlying relation: DisjunctiveConditionalIndependenceRelation.Independence Queries: [ total: 748, independent: 743, independent conditional: 0, independent unconditional: 743, dependent: 5, dependent conditional: 0, dependent unconditional: 5, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , DisjunctiveConditionalIndependenceRelation.Statistics on underlying relation: SemanticConditionEliminator.Independence Queries: [ total: 748, independent: 743, independent conditional: 0, independent unconditional: 743, dependent: 5, dependent conditional: 0, dependent unconditional: 5, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticConditionEliminator.Statistics on underlying relation: CachedIndependenceRelation.Independence Queries: [ total: 748, independent: 743, independent conditional: 0, independent unconditional: 743, dependent: 5, dependent conditional: 0, dependent unconditional: 5, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 748, independent: 743, independent conditional: 0, independent unconditional: 743, dependent: 5, dependent conditional: 0, dependent unconditional: 5, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 748, independent: 741, independent conditional: 0, independent unconditional: 741, dependent: 7, dependent conditional: 0, dependent unconditional: 7, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 7, independent: 2, independent conditional: 0, independent unconditional: 2, dependent: 5, dependent conditional: 0, dependent unconditional: 5, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 28, independent: 2, independent conditional: 0, independent unconditional: 2, dependent: 26, dependent conditional: 0, dependent unconditional: 26, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 748, independent: 0, independent conditional: 0, independent unconditional: 0, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 748, unknown conditional: 0, unknown unconditional: 748] , Statistics on independence cache: Total cache size (in pairs): 1213, Positive cache size: 1208, Positive conditional cache size: 0, Positive unconditional cache size: 1208, Negative cache size: 5, Negative conditional cache size: 0, Negative unconditional cache size: 5, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0, Eliminated conditions: 0, Maximal queried relation: -1 - TimeoutResultAtElement [Line: 110]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (40states, 0/22 universal loopers) in iteration 45,while PetriNetUnfolder was constructing finite prefix that currently has 272924 conditions, 5903 events (3506/5902 cut-off events. For 985/985 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 41730 event pairs, 6 based on Foata normal form. 0/4770 useless extension candidates. Maximal degree in co-relation 103330. Up to 5902 conditions per place.). - TimeoutResultAtElement [Line: 102]: 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 (40states, 0/22 universal loopers) in iteration 45,while PetriNetUnfolder was constructing finite prefix that currently has 272924 conditions, 5903 events (3506/5902 cut-off events. For 985/985 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 41730 event pairs, 6 based on Foata normal form. 0/4770 useless extension candidates. Maximal degree in co-relation 103330. Up to 5902 conditions per place.). - TimeoutResultAtElement [Line: 103]: 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 (40states, 0/22 universal loopers) in iteration 45,while PetriNetUnfolder was constructing finite prefix that currently has 272924 conditions, 5903 events (3506/5902 cut-off events. For 985/985 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 41730 event pairs, 6 based on Foata normal form. 0/4770 useless extension candidates. Maximal degree in co-relation 103330. Up to 5902 conditions per place.). - TimeoutResultAtElement [Line: 104]: 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 (40states, 0/22 universal loopers) in iteration 45,while PetriNetUnfolder was constructing finite prefix that currently has 272924 conditions, 5903 events (3506/5902 cut-off events. For 985/985 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 41730 event pairs, 6 based on Foata normal form. 0/4770 useless extension candidates. Maximal degree in co-relation 103330. Up to 5902 conditions per place.). - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 170 locations, 4 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 2.7s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 807.1s, OverallIterations: 45, TraceHistogramMax: 3, PathProgramHistogramMax: 20, EmptinessCheckTime: 0.0s, AutomataDifference: 697.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 4.8s, HoareTripleCheckerStatistics: 717 mSolverCounterUnknown, 9448 SdHoareTripleChecker+Valid, 202.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 9448 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 196.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 2102 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 42074 IncrementalHoareTripleChecker+Invalid, 44893 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 2102 mSolverCounterUnsat, 0 mSDtfsCounter, 42074 mSolverCounterSat, 0.2s SdHoareTripleChecker+Time, 717 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2651 GetRequests, 881 SyntacticMatches, 11 SemanticMatches, 1759 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22401 ImplicationChecksByTransitivity, 435.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=316536occurred in iteration=44, InterpolantAutomatonStates: 946, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 2.7s AutomataMinimizationTime, 44 MinimizatonAttempts, 101923 StatesRemovedByMinimization, 44 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.5s SsaConstructionTime, 3.7s SatisfiabilityAnalysisTime, 86.7s InterpolantComputationTime, 1845 NumberOfCodeBlocks, 1823 NumberOfCodeBlocksAsserted, 108 NumberOfCheckSat, 2317 ConstructedInterpolants, 71 QuantifiedInterpolants, 97080 SizeOfPredicates, 793 NumberOfNonLiveVariables, 9326 ConjunctsInSsa, 1715 ConjunctsInUnsatCore, 110 InterpolantComputations, 21 PerfectInterpolantSequences, 113/455 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