/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-dec-subseq.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.repeated-lipton-a802222-m [2022-12-12 23:19:08,302 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-12 23:19:08,304 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-12 23:19:08,347 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-12 23:19:08,347 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-12 23:19:08,349 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-12 23:19:08,353 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-12 23:19:08,356 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-12 23:19:08,359 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-12 23:19:08,363 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-12 23:19:08,364 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-12 23:19:08,366 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-12 23:19:08,366 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-12 23:19:08,368 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-12 23:19:08,369 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-12 23:19:08,372 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-12 23:19:08,372 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-12 23:19:08,373 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-12 23:19:08,375 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-12 23:19:08,379 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-12 23:19:08,381 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-12 23:19:08,381 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-12 23:19:08,382 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-12 23:19:08,383 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-12 23:19:08,388 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-12 23:19:08,389 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-12 23:19:08,389 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-12 23:19:08,390 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-12 23:19:08,390 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-12 23:19:08,391 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-12 23:19:08,391 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-12 23:19:08,394 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-12 23:19:08,394 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-12 23:19:08,395 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-12 23:19:08,395 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-12 23:19:08,395 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-12 23:19:08,396 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-12 23:19:08,396 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-12 23:19:08,396 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-12 23:19:08,397 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-12 23:19:08,397 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-12 23:19:08,401 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 23:19:08,424 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-12 23:19:08,425 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-12 23:19:08,425 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-12 23:19:08,425 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-12 23:19:08,426 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-12 23:19:08,426 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-12 23:19:08,426 INFO L138 SettingsManager]: * Use SBE=true [2022-12-12 23:19:08,426 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-12 23:19:08,426 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-12 23:19:08,426 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-12 23:19:08,426 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-12 23:19:08,427 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-12 23:19:08,427 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-12 23:19:08,427 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-12 23:19:08,427 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-12 23:19:08,427 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-12 23:19:08,427 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-12 23:19:08,427 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-12 23:19:08,427 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-12 23:19:08,427 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-12 23:19:08,427 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-12 23:19:08,428 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-12-12 23:19:08,428 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-12 23:19:08,428 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-12 23:19:08,428 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-12 23:19:08,428 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-12 23:19:08,428 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-12 23:19:08,428 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-12 23:19:08,428 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-12 23:19:08,428 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-12 23:19:08,428 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use on-demand Petri net difference -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Size reduction to apply after Petri net difference -> REMOVE_DEAD [2022-12-12 23:19:08,663 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-12 23:19:08,681 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-12 23:19:08,683 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-12 23:19:08,685 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-12 23:19:08,685 INFO L275 PluginConnector]: CDTParser initialized [2022-12-12 23:19:08,687 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-more-dec-subseq.wvr.c [2022-12-12 23:19:09,731 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-12 23:19:09,957 INFO L351 CDTParser]: Found 1 translation units. [2022-12-12 23:19:09,958 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-dec-subseq.wvr.c [2022-12-12 23:19:09,962 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0e253a5e6/4d83f3e806ec44ebbd2c6b849f39ed08/FLAGda54ca658 [2022-12-12 23:19:09,972 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0e253a5e6/4d83f3e806ec44ebbd2c6b849f39ed08 [2022-12-12 23:19:09,973 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-12 23:19:09,974 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-12-12 23:19:09,975 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-12 23:19:09,975 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-12 23:19:09,977 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-12 23:19:09,977 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.12 11:19:09" (1/1) ... [2022-12-12 23:19:09,978 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4371941f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 11:19:09, skipping insertion in model container [2022-12-12 23:19:09,978 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.12 11:19:09" (1/1) ... [2022-12-12 23:19:09,982 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-12 23:19:09,998 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-12 23:19:10,087 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-12 23:19:10,089 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-12 23:19:10,089 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-12 23:19:10,090 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-12 23:19:10,093 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-12 23:19:10,093 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-12 23:19:10,094 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-12 23:19:10,096 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-12 23:19:10,101 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-12 23:19:10,102 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-12 23:19:10,112 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-dec-subseq.wvr.c[2924,2937] [2022-12-12 23:19:10,122 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-12 23:19:10,131 INFO L203 MainTranslator]: Completed pre-run [2022-12-12 23:19:10,144 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-12 23:19:10,145 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-12 23:19:10,146 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-12 23:19:10,146 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-12 23:19:10,147 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-12 23:19:10,147 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-12 23:19:10,148 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-12 23:19:10,149 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-12 23:19:10,153 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-12 23:19:10,155 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-12 23:19:10,161 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-dec-subseq.wvr.c[2924,2937] [2022-12-12 23:19:10,168 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-12 23:19:10,179 INFO L208 MainTranslator]: Completed translation [2022-12-12 23:19:10,179 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 11:19:10 WrapperNode [2022-12-12 23:19:10,179 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-12 23:19:10,180 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-12 23:19:10,180 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-12 23:19:10,180 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-12 23:19:10,186 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 11:19:10" (1/1) ... [2022-12-12 23:19:10,199 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 11:19:10" (1/1) ... [2022-12-12 23:19:10,225 INFO L138 Inliner]: procedures = 24, calls = 45, calls flagged for inlining = 11, calls inlined = 13, statements flattened = 191 [2022-12-12 23:19:10,226 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-12 23:19:10,228 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-12 23:19:10,228 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-12 23:19:10,228 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-12 23:19:10,234 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 11:19:10" (1/1) ... [2022-12-12 23:19:10,235 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 11:19:10" (1/1) ... [2022-12-12 23:19:10,245 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 11:19:10" (1/1) ... [2022-12-12 23:19:10,245 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 11:19:10" (1/1) ... [2022-12-12 23:19:10,254 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 11:19:10" (1/1) ... [2022-12-12 23:19:10,257 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 11:19:10" (1/1) ... [2022-12-12 23:19:10,258 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 11:19:10" (1/1) ... [2022-12-12 23:19:10,259 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 11:19:10" (1/1) ... [2022-12-12 23:19:10,260 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-12 23:19:10,261 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-12 23:19:10,261 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-12 23:19:10,261 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-12 23:19:10,261 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 11:19:10" (1/1) ... [2022-12-12 23:19:10,273 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-12 23:19:10,281 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:19:10,305 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 23:19:10,324 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 23:19:10,334 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-12 23:19:10,335 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-12-12 23:19:10,335 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-12-12 23:19:10,335 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-12-12 23:19:10,335 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-12-12 23:19:10,335 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-12 23:19:10,335 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-12 23:19:10,335 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-12 23:19:10,335 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-12-12 23:19:10,335 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-12-12 23:19:10,335 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-12 23:19:10,335 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-12 23:19:10,335 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-12 23:19:10,336 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-12 23:19:10,336 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-12 23:19:10,336 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 23:19:10,459 INFO L236 CfgBuilder]: Building ICFG [2022-12-12 23:19:10,460 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-12 23:19:10,701 INFO L277 CfgBuilder]: Performing block encoding [2022-12-12 23:19:10,779 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-12 23:19:10,779 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2022-12-12 23:19:10,781 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.12 11:19:10 BoogieIcfgContainer [2022-12-12 23:19:10,781 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-12 23:19:10,783 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-12 23:19:10,783 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-12 23:19:10,785 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-12 23:19:10,785 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.12 11:19:09" (1/3) ... [2022-12-12 23:19:10,786 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a353640 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.12 11:19:10, skipping insertion in model container [2022-12-12 23:19:10,786 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 11:19:10" (2/3) ... [2022-12-12 23:19:10,786 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a353640 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.12 11:19:10, skipping insertion in model container [2022-12-12 23:19:10,786 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.12 11:19:10" (3/3) ... [2022-12-12 23:19:10,787 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-dec-subseq.wvr.c [2022-12-12 23:19:10,801 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-12 23:19:10,801 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-12 23:19:10,801 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-12 23:19:10,840 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-12-12 23:19:10,865 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 165 places, 173 transitions, 362 flow [2022-12-12 23:19:10,915 INFO L130 PetriNetUnfolder]: 15/171 cut-off events. [2022-12-12 23:19:10,915 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-12 23:19:10,919 INFO L83 FinitePrefix]: Finished finitePrefix Result has 180 conditions, 171 events. 15/171 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 104 event pairs, 0 based on Foata normal form. 0/155 useless extension candidates. Maximal degree in co-relation 138. Up to 2 conditions per place. [2022-12-12 23:19:10,919 INFO L82 GeneralOperation]: Start removeDead. Operand has 165 places, 173 transitions, 362 flow [2022-12-12 23:19:10,923 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 155 places, 163 transitions, 338 flow [2022-12-12 23:19:10,925 INFO L203 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-12 23:19:10,941 INFO L174 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 155 places, 163 transitions, 338 flow [2022-12-12 23:19:10,945 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 155 places, 163 transitions, 338 flow [2022-12-12 23:19:10,999 INFO L130 PetriNetUnfolder]: 15/163 cut-off events. [2022-12-12 23:19:10,999 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-12 23:19:11,000 INFO L83 FinitePrefix]: Finished finitePrefix Result has 172 conditions, 163 events. 15/163 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 103 event pairs, 0 based on Foata normal form. 0/148 useless extension candidates. Maximal degree in co-relation 138. Up to 2 conditions per place. [2022-12-12 23:19:11,003 INFO L222 LiptonReduction]: Starting Lipton reduction on Petri net that has 155 places, 163 transitions, 338 flow [2022-12-12 23:19:11,004 INFO L226 LiptonReduction]: Number of co-enabled transitions 690 [2022-12-12 23:19:16,152 INFO L241 LiptonReduction]: Total number of compositions: 140 [2022-12-12 23:19:16,164 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-12 23:19:16,168 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;@1670b819, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, Conditionality=CONDITIONAL_DISJUNCTIVE, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-12 23:19:16,168 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-12-12 23:19:16,173 INFO L130 PetriNetUnfolder]: 5/22 cut-off events. [2022-12-12 23:19:16,173 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-12 23:19:16,173 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:19:16,174 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:19:16,174 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 23:19:16,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:19:16,178 INFO L85 PathProgramCache]: Analyzing trace with hash -1533171233, now seen corresponding path program 1 times [2022-12-12 23:19:16,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:19:16,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179069272] [2022-12-12 23:19:16,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:19:16,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:19:16,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:19:16,568 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 23:19:16,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:19:16,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179069272] [2022-12-12 23:19:16,569 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179069272] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 23:19:16,569 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-12 23:19:16,570 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-12 23:19:16,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061142140] [2022-12-12 23:19:16,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 23:19:16,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-12 23:19:16,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:19:16,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-12 23:19:16,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-12 23:19:16,597 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 23 [2022-12-12 23:19:16,598 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 23 transitions, 58 flow. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 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 23:19:16,598 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:19:16,598 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 23 [2022-12-12 23:19:16,599 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:19:16,726 INFO L130 PetriNetUnfolder]: 146/245 cut-off events. [2022-12-12 23:19:16,727 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2022-12-12 23:19:16,727 INFO L83 FinitePrefix]: Finished finitePrefix Result has 522 conditions, 245 events. 146/245 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 773 event pairs, 38 based on Foata normal form. 0/195 useless extension candidates. Maximal degree in co-relation 472. Up to 153 conditions per place. [2022-12-12 23:19:16,730 INFO L137 encePairwiseOnDemand]: 18/23 looper letters, 31 selfloop transitions, 4 changer transitions 0/35 dead transitions. [2022-12-12 23:19:16,730 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 35 transitions, 155 flow [2022-12-12 23:19:16,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-12 23:19:16,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-12 23:19:16,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 36 transitions. [2022-12-12 23:19:16,740 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.391304347826087 [2022-12-12 23:19:16,743 INFO L295 CegarLoopForPetriNet]: 25 programPoint places, 3 predicate places. [2022-12-12 23:19:16,743 INFO L82 GeneralOperation]: Start removeDead. Operand has 28 places, 35 transitions, 155 flow [2022-12-12 23:19:16,744 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 28 places, 35 transitions, 155 flow [2022-12-12 23:19:16,745 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 35 transitions, 155 flow [2022-12-12 23:19:16,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 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 23:19:16,745 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:19:16,746 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:19:16,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-12 23:19:16,746 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 23:19:16,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:19:16,747 INFO L85 PathProgramCache]: Analyzing trace with hash 908602455, now seen corresponding path program 1 times [2022-12-12 23:19:16,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:19:16,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645210411] [2022-12-12 23:19:16,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:19:16,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:19:16,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:19:16,848 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 23:19:16,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:19:16,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645210411] [2022-12-12 23:19:16,849 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645210411] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 23:19:16,849 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-12 23:19:16,849 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-12 23:19:16,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960232522] [2022-12-12 23:19:16,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 23:19:16,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-12 23:19:16,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:19:16,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-12 23:19:16,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-12 23:19:16,851 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 23 [2022-12-12 23:19:16,851 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 35 transitions, 155 flow. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 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 23:19:16,851 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:19:16,851 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 23 [2022-12-12 23:19:16,851 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:19:16,923 INFO L130 PetriNetUnfolder]: 146/246 cut-off events. [2022-12-12 23:19:16,923 INFO L131 PetriNetUnfolder]: For 14/14 co-relation queries the response was YES. [2022-12-12 23:19:16,924 INFO L83 FinitePrefix]: Finished finitePrefix Result has 771 conditions, 246 events. 146/246 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 750 event pairs, 38 based on Foata normal form. 0/196 useless extension candidates. Maximal degree in co-relation 697. Up to 153 conditions per place. [2022-12-12 23:19:16,925 INFO L137 encePairwiseOnDemand]: 17/23 looper letters, 31 selfloop transitions, 5 changer transitions 0/36 dead transitions. [2022-12-12 23:19:16,925 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 36 transitions, 231 flow [2022-12-12 23:19:16,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-12 23:19:16,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-12 23:19:16,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 37 transitions. [2022-12-12 23:19:16,926 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.40217391304347827 [2022-12-12 23:19:16,927 INFO L295 CegarLoopForPetriNet]: 25 programPoint places, 6 predicate places. [2022-12-12 23:19:16,927 INFO L82 GeneralOperation]: Start removeDead. Operand has 31 places, 36 transitions, 231 flow [2022-12-12 23:19:16,928 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 31 places, 36 transitions, 231 flow [2022-12-12 23:19:16,928 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 36 transitions, 231 flow [2022-12-12 23:19:16,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 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 23:19:16,928 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:19:16,928 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:19:16,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-12 23:19:16,929 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 23:19:16,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:19:16,929 INFO L85 PathProgramCache]: Analyzing trace with hash -246355024, now seen corresponding path program 1 times [2022-12-12 23:19:16,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:19:16,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695588359] [2022-12-12 23:19:16,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:19:16,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:19:16,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:19:17,027 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 23:19:17,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:19:17,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695588359] [2022-12-12 23:19:17,028 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695588359] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 23:19:17,028 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-12 23:19:17,028 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-12 23:19:17,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467492033] [2022-12-12 23:19:17,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 23:19:17,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-12 23:19:17,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:19:17,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-12 23:19:17,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-12 23:19:17,029 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 23 [2022-12-12 23:19:17,029 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 36 transitions, 231 flow. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 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 23:19:17,029 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:19:17,030 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 23 [2022-12-12 23:19:17,030 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:19:17,130 INFO L130 PetriNetUnfolder]: 228/382 cut-off events. [2022-12-12 23:19:17,131 INFO L131 PetriNetUnfolder]: For 15/15 co-relation queries the response was YES. [2022-12-12 23:19:17,131 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1563 conditions, 382 events. 228/382 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1404 event pairs, 10 based on Foata normal form. 0/312 useless extension candidates. Maximal degree in co-relation 1450. Up to 241 conditions per place. [2022-12-12 23:19:17,133 INFO L137 encePairwiseOnDemand]: 16/23 looper letters, 54 selfloop transitions, 21 changer transitions 0/75 dead transitions. [2022-12-12 23:19:17,133 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 75 transitions, 624 flow [2022-12-12 23:19:17,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-12 23:19:17,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-12 23:19:17,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 48 transitions. [2022-12-12 23:19:17,135 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.41739130434782606 [2022-12-12 23:19:17,135 INFO L295 CegarLoopForPetriNet]: 25 programPoint places, 10 predicate places. [2022-12-12 23:19:17,135 INFO L82 GeneralOperation]: Start removeDead. Operand has 35 places, 75 transitions, 624 flow [2022-12-12 23:19:17,137 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 35 places, 75 transitions, 624 flow [2022-12-12 23:19:17,138 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 75 transitions, 624 flow [2022-12-12 23:19:17,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 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 23:19:17,138 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:19:17,138 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:19:17,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-12 23:19:17,138 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 23:19:17,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:19:17,139 INFO L85 PathProgramCache]: Analyzing trace with hash 862312552, now seen corresponding path program 2 times [2022-12-12 23:19:17,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:19:17,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986597006] [2022-12-12 23:19:17,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:19:17,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:19:17,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:19:17,223 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 23:19:17,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:19:17,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986597006] [2022-12-12 23:19:17,223 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986597006] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 23:19:17,224 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-12 23:19:17,224 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-12 23:19:17,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655854435] [2022-12-12 23:19:17,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 23:19:17,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-12 23:19:17,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:19:17,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-12 23:19:17,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-12 23:19:17,225 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 23 [2022-12-12 23:19:17,225 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 75 transitions, 624 flow. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 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 23:19:17,225 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:19:17,225 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 23 [2022-12-12 23:19:17,225 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:19:17,339 INFO L130 PetriNetUnfolder]: 220/374 cut-off events. [2022-12-12 23:19:17,339 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2022-12-12 23:19:17,340 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1906 conditions, 374 events. 220/374 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1356 event pairs, 4 based on Foata normal form. 2/312 useless extension candidates. Maximal degree in co-relation 1767. Up to 237 conditions per place. [2022-12-12 23:19:17,342 INFO L137 encePairwiseOnDemand]: 18/23 looper letters, 109 selfloop transitions, 11 changer transitions 0/120 dead transitions. [2022-12-12 23:19:17,342 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 120 transitions, 1227 flow [2022-12-12 23:19:17,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-12 23:19:17,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-12 23:19:17,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 44 transitions. [2022-12-12 23:19:17,343 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.4782608695652174 [2022-12-12 23:19:17,344 INFO L295 CegarLoopForPetriNet]: 25 programPoint places, 13 predicate places. [2022-12-12 23:19:17,344 INFO L82 GeneralOperation]: Start removeDead. Operand has 38 places, 120 transitions, 1227 flow [2022-12-12 23:19:17,347 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 38 places, 120 transitions, 1227 flow [2022-12-12 23:19:17,347 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 120 transitions, 1227 flow [2022-12-12 23:19:17,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 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 23:19:17,347 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:19:17,347 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:19:17,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-12 23:19:17,348 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 23:19:17,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:19:17,348 INFO L85 PathProgramCache]: Analyzing trace with hash -880598024, now seen corresponding path program 3 times [2022-12-12 23:19:17,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:19:17,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753972655] [2022-12-12 23:19:17,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:19:17,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:19:17,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:19:17,429 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-12 23:19:17,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:19:17,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753972655] [2022-12-12 23:19:17,430 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753972655] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 23:19:17,430 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-12 23:19:17,430 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-12 23:19:17,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927838447] [2022-12-12 23:19:17,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 23:19:17,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-12 23:19:17,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:19:17,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-12 23:19:17,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-12 23:19:17,432 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 23 [2022-12-12 23:19:17,432 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 120 transitions, 1227 flow. Second operand has 3 states, 3 states have (on average 6.333333333333333) 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 23:19:17,432 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:19:17,432 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 23 [2022-12-12 23:19:17,432 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:19:17,510 INFO L130 PetriNetUnfolder]: 290/493 cut-off events. [2022-12-12 23:19:17,510 INFO L131 PetriNetUnfolder]: For 60/60 co-relation queries the response was YES. [2022-12-12 23:19:17,511 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2974 conditions, 493 events. 290/493 cut-off events. For 60/60 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 1947 event pairs, 4 based on Foata normal form. 1/400 useless extension candidates. Maximal degree in co-relation 2754. Up to 314 conditions per place. [2022-12-12 23:19:17,514 INFO L137 encePairwiseOnDemand]: 20/23 looper letters, 130 selfloop transitions, 10 changer transitions 18/163 dead transitions. [2022-12-12 23:19:17,514 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 163 transitions, 1979 flow [2022-12-12 23:19:17,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-12 23:19:17,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-12 23:19:17,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 39 transitions. [2022-12-12 23:19:17,515 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.5652173913043478 [2022-12-12 23:19:17,515 INFO L295 CegarLoopForPetriNet]: 25 programPoint places, 15 predicate places. [2022-12-12 23:19:17,515 INFO L82 GeneralOperation]: Start removeDead. Operand has 40 places, 163 transitions, 1979 flow [2022-12-12 23:19:17,518 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 40 places, 145 transitions, 1760 flow [2022-12-12 23:19:17,519 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 145 transitions, 1760 flow [2022-12-12 23:19:17,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) 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 23:19:17,519 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:19:17,519 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:19:17,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-12 23:19:17,519 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 23:19:17,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:19:17,519 INFO L85 PathProgramCache]: Analyzing trace with hash -1663262944, now seen corresponding path program 1 times [2022-12-12 23:19:17,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:19:17,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607259620] [2022-12-12 23:19:17,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:19:17,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:19:17,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:19:17,673 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-12 23:19:17,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:19:17,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607259620] [2022-12-12 23:19:17,674 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607259620] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 23:19:17,674 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-12 23:19:17,675 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-12 23:19:17,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870650247] [2022-12-12 23:19:17,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 23:19:17,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-12 23:19:17,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:19:17,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-12 23:19:17,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-12 23:19:17,676 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 23 [2022-12-12 23:19:17,676 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 145 transitions, 1760 flow. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 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 23:19:17,676 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:19:17,676 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 23 [2022-12-12 23:19:17,676 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:19:17,773 INFO L130 PetriNetUnfolder]: 244/436 cut-off events. [2022-12-12 23:19:17,773 INFO L131 PetriNetUnfolder]: For 80/80 co-relation queries the response was YES. [2022-12-12 23:19:17,774 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3069 conditions, 436 events. 244/436 cut-off events. For 80/80 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1652 event pairs, 2 based on Foata normal form. 34/400 useless extension candidates. Maximal degree in co-relation 2779. Up to 344 conditions per place. [2022-12-12 23:19:17,776 INFO L137 encePairwiseOnDemand]: 18/23 looper letters, 149 selfloop transitions, 7 changer transitions 15/171 dead transitions. [2022-12-12 23:19:17,776 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 171 transitions, 2427 flow [2022-12-12 23:19:17,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-12 23:19:17,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-12 23:19:17,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 44 transitions. [2022-12-12 23:19:17,777 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.3826086956521739 [2022-12-12 23:19:17,778 INFO L295 CegarLoopForPetriNet]: 25 programPoint places, 19 predicate places. [2022-12-12 23:19:17,778 INFO L82 GeneralOperation]: Start removeDead. Operand has 44 places, 171 transitions, 2427 flow [2022-12-12 23:19:17,781 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 42 places, 156 transitions, 2207 flow [2022-12-12 23:19:17,781 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 156 transitions, 2207 flow [2022-12-12 23:19:17,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 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 23:19:17,781 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:19:17,781 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 23:19:17,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-12 23:19:17,782 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 23:19:17,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:19:17,782 INFO L85 PathProgramCache]: Analyzing trace with hash -595735184, now seen corresponding path program 1 times [2022-12-12 23:19:17,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:19:17,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846655583] [2022-12-12 23:19:17,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:19:17,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:19:17,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:19:17,869 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-12 23:19:17,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:19:17,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846655583] [2022-12-12 23:19:17,870 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846655583] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 23:19:17,870 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-12 23:19:17,870 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-12 23:19:17,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017571389] [2022-12-12 23:19:17,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 23:19:17,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-12 23:19:17,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:19:17,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-12 23:19:17,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-12 23:19:17,871 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 23 [2022-12-12 23:19:17,871 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 156 transitions, 2207 flow. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 23:19:17,871 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:19:17,871 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 23 [2022-12-12 23:19:17,871 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:19:17,946 INFO L130 PetriNetUnfolder]: 277/501 cut-off events. [2022-12-12 23:19:17,946 INFO L131 PetriNetUnfolder]: For 227/227 co-relation queries the response was YES. [2022-12-12 23:19:17,947 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3984 conditions, 501 events. 277/501 cut-off events. For 227/227 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1916 event pairs, 2 based on Foata normal form. 16/439 useless extension candidates. Maximal degree in co-relation 3020. Up to 381 conditions per place. [2022-12-12 23:19:17,949 INFO L137 encePairwiseOnDemand]: 19/23 looper letters, 147 selfloop transitions, 2 changer transitions 40/197 dead transitions. [2022-12-12 23:19:17,949 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 197 transitions, 3174 flow [2022-12-12 23:19:17,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-12 23:19:17,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-12 23:19:17,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 38 transitions. [2022-12-12 23:19:17,951 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.41304347826086957 [2022-12-12 23:19:17,951 INFO L295 CegarLoopForPetriNet]: 25 programPoint places, 20 predicate places. [2022-12-12 23:19:17,951 INFO L82 GeneralOperation]: Start removeDead. Operand has 45 places, 197 transitions, 3174 flow [2022-12-12 23:19:17,954 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 44 places, 157 transitions, 2519 flow [2022-12-12 23:19:17,954 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 157 transitions, 2519 flow [2022-12-12 23:19:17,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 23:19:17,955 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:19:17,955 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:19:17,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-12 23:19:17,955 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 23:19:17,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:19:17,955 INFO L85 PathProgramCache]: Analyzing trace with hash 1441288394, now seen corresponding path program 1 times [2022-12-12 23:19:17,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:19:17,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069047700] [2022-12-12 23:19:17,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:19:17,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:19:17,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:19:18,480 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 23:19:18,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:19:18,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069047700] [2022-12-12 23:19:18,480 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069047700] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 23:19:18,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95489108] [2022-12-12 23:19:18,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:19:18,481 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:19:18,481 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:19:18,483 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 23:19:18,532 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 23:19:18,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:19:18,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 50 conjunts are in the unsatisfiable core [2022-12-12 23:19:18,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 23:19:18,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-12 23:19:18,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-12 23:19:18,707 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-12 23:19:18,708 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 20 [2022-12-12 23:19:18,743 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 23:19:18,784 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-12 23:19:18,784 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 11 treesize of output 11 [2022-12-12 23:19:18,809 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 23:19:18,837 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 23:19:18,880 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 23:19:19,202 INFO L321 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2022-12-12 23:19:19,202 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 10 [2022-12-12 23:19:19,222 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 23:19:19,222 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 23:19:19,957 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 23:19:19,957 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 126 treesize of output 90 [2022-12-12 23:19:20,001 INFO L321 Elim1Store]: treesize reduction 9, result has 82.4 percent of original size [2022-12-12 23:19:20,002 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 13804 treesize of output 12821 [2022-12-12 23:19:20,121 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-12 23:19:20,136 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 23:19:20,136 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 12780 treesize of output 9740 [2022-12-12 23:19:20,202 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-12 23:19:20,216 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 23:19:20,217 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 9708 treesize of output 8972 [2022-12-12 23:19:20,269 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-12 23:19:20,284 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 23:19:20,285 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 8940 treesize of output 7436 [2022-12-12 23:19:30,845 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 23:19:30,846 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 62 treesize of output 51 [2022-12-12 23:19:30,881 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 23:19:30,882 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 3382 treesize of output 3146 [2022-12-12 23:19:30,903 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 23:19:30,904 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 3126 treesize of output 2759 [2022-12-12 23:19:30,928 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 23:19:30,929 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 2742 treesize of output 2567 [2022-12-12 23:19:30,951 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 23:19:30,952 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 2550 treesize of output 1799 [2022-12-12 23:19:31,587 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 23:19:31,588 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [95489108] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 23:19:31,588 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 23:19:31,588 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 28 [2022-12-12 23:19:31,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3867274] [2022-12-12 23:19:31,588 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 23:19:31,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-12-12 23:19:31,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:19:31,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-12-12 23:19:31,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=644, Unknown=14, NotChecked=0, Total=870 [2022-12-12 23:19:31,590 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 23 [2022-12-12 23:19:31,590 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 157 transitions, 2519 flow. Second operand has 30 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 29 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 23:19:31,590 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:19:31,590 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 23 [2022-12-12 23:19:31,590 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:19:41,174 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 23:19:44,766 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 23:19:46,128 INFO L130 PetriNetUnfolder]: 1243/2165 cut-off events. [2022-12-12 23:19:46,128 INFO L131 PetriNetUnfolder]: For 835/835 co-relation queries the response was YES. [2022-12-12 23:19:46,130 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19388 conditions, 2165 events. 1243/2165 cut-off events. For 835/835 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 11802 event pairs, 13 based on Foata normal form. 7/1834 useless extension candidates. Maximal degree in co-relation 10884. Up to 2015 conditions per place. [2022-12-12 23:19:46,146 INFO L137 encePairwiseOnDemand]: 9/23 looper letters, 598 selfloop transitions, 206 changer transitions 95/899 dead transitions. [2022-12-12 23:19:46,146 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 899 transitions, 16254 flow [2022-12-12 23:19:46,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-12-12 23:19:46,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2022-12-12 23:19:46,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 285 transitions. [2022-12-12 23:19:46,150 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.3442028985507246 [2022-12-12 23:19:46,151 INFO L295 CegarLoopForPetriNet]: 25 programPoint places, 54 predicate places. [2022-12-12 23:19:46,152 INFO L82 GeneralOperation]: Start removeDead. Operand has 79 places, 899 transitions, 16254 flow [2022-12-12 23:19:46,171 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 77 places, 804 transitions, 14517 flow [2022-12-12 23:19:46,172 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 804 transitions, 14517 flow [2022-12-12 23:19:46,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 29 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 23:19:46,172 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:19:46,172 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:19:46,178 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 23:19:46,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:19:46,380 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 23:19:46,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:19:46,380 INFO L85 PathProgramCache]: Analyzing trace with hash -598777594, now seen corresponding path program 2 times [2022-12-12 23:19:46,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:19:46,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007128197] [2022-12-12 23:19:46,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:19:46,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:19:46,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:19:47,287 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 23:19:47,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:19:47,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007128197] [2022-12-12 23:19:47,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007128197] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 23:19:47,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638793207] [2022-12-12 23:19:47,288 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-12 23:19:47,288 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:19:47,288 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:19:47,304 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 23:19:47,329 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 23:19:47,405 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-12 23:19:47,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 23:19:47,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 41 conjunts are in the unsatisfiable core [2022-12-12 23:19:47,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 23:19:47,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-12 23:19:47,572 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-12-12 23:19:47,771 INFO L321 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2022-12-12 23:19:47,772 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 38 treesize of output 10 [2022-12-12 23:19:47,792 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 23:19:47,792 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 23:19:48,151 INFO L321 Elim1Store]: treesize reduction 15, result has 83.9 percent of original size [2022-12-12 23:19:48,152 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 259 treesize of output 256 [2022-12-12 23:19:48,174 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 23:19:48,174 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 174 treesize of output 189 [2022-12-12 23:19:48,194 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 23:19:48,195 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 144 treesize of output 137 [2022-12-12 23:19:48,900 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 23:19:48,900 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [638793207] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 23:19:48,900 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 23:19:48,901 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 27 [2022-12-12 23:19:48,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60750020] [2022-12-12 23:19:48,901 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 23:19:48,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-12-12 23:19:48,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:19:48,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-12-12 23:19:48,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=666, Unknown=1, NotChecked=0, Total=812 [2022-12-12 23:19:48,902 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 23 [2022-12-12 23:19:48,902 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 804 transitions, 14517 flow. Second operand has 29 states, 28 states have (on average 2.25) internal successors, (63), 28 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 23:19:48,902 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:19:48,902 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 23 [2022-12-12 23:19:48,902 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:19:56,977 WARN L233 SmtUtils]: Spent 7.28s on a formula simplification. DAG size of input: 83 DAG size of output: 72 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-12 23:20:06,544 WARN L233 SmtUtils]: Spent 9.21s on a formula simplification. DAG size of input: 74 DAG size of output: 64 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-12 23:20:17,642 WARN L233 SmtUtils]: Spent 9.96s on a formula simplification. DAG size of input: 82 DAG size of output: 75 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-12 23:20:35,290 WARN L233 SmtUtils]: Spent 17.36s on a formula simplification. DAG size of input: 88 DAG size of output: 77 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-12 23:20:53,394 WARN L233 SmtUtils]: Spent 18.03s on a formula simplification. DAG size of input: 87 DAG size of output: 80 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-12 23:20:54,891 INFO L130 PetriNetUnfolder]: 1952/3418 cut-off events. [2022-12-12 23:20:54,891 INFO L131 PetriNetUnfolder]: For 1276/1276 co-relation queries the response was YES. [2022-12-12 23:20:54,894 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34035 conditions, 3418 events. 1952/3418 cut-off events. For 1276/1276 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 20532 event pairs, 13 based on Foata normal form. 51/2979 useless extension candidates. Maximal degree in co-relation 18750. Up to 3190 conditions per place. [2022-12-12 23:20:54,913 INFO L137 encePairwiseOnDemand]: 8/23 looper letters, 1030 selfloop transitions, 369 changer transitions 123/1522 dead transitions. [2022-12-12 23:20:54,913 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 1522 transitions, 30591 flow [2022-12-12 23:20:54,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-12-12 23:20:54,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2022-12-12 23:20:54,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 346 transitions. [2022-12-12 23:20:54,926 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.34984833164812945 [2022-12-12 23:20:54,926 INFO L295 CegarLoopForPetriNet]: 25 programPoint places, 94 predicate places. [2022-12-12 23:20:54,928 INFO L82 GeneralOperation]: Start removeDead. Operand has 119 places, 1522 transitions, 30591 flow [2022-12-12 23:20:54,955 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 114 places, 1399 transitions, 28083 flow [2022-12-12 23:20:54,955 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 1399 transitions, 28083 flow [2022-12-12 23:20:54,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.25) internal successors, (63), 28 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 23:20:54,955 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:20:54,956 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:20:54,971 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-12-12 23:20:55,160 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,SelfDestructingSolverStorable8 [2022-12-12 23:20:55,161 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 23:20:55,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:20:55,161 INFO L85 PathProgramCache]: Analyzing trace with hash 941799216, now seen corresponding path program 3 times [2022-12-12 23:20:55,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:20:55,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938004213] [2022-12-12 23:20:55,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:20:55,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:20:55,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:20:55,238 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-12 23:20:55,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:20:55,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938004213] [2022-12-12 23:20:55,239 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938004213] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 23:20:55,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [973680031] [2022-12-12 23:20:55,239 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-12 23:20:55,239 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:20:55,239 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:20:55,240 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 23:20:55,271 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 23:20:55,400 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-12 23:20:55,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 23:20:55,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-12 23:20:55,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 23:20:55,428 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-12 23:20:55,428 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 23:20:55,471 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-12 23:20:55,471 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [973680031] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 23:20:55,471 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 23:20:55,471 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 8 [2022-12-12 23:20:55,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355295628] [2022-12-12 23:20:55,471 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 23:20:55,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-12 23:20:55,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:20:55,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-12 23:20:55,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-12-12 23:20:55,473 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 23 [2022-12-12 23:20:55,473 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 1399 transitions, 28083 flow. Second operand has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 0 states have call successors, (0), 0 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 23:20:55,473 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:20:55,473 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 23 [2022-12-12 23:20:55,474 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:20:56,371 INFO L130 PetriNetUnfolder]: 1999/3448 cut-off events. [2022-12-12 23:20:56,371 INFO L131 PetriNetUnfolder]: For 1252/1252 co-relation queries the response was YES. [2022-12-12 23:20:56,374 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37782 conditions, 3448 events. 1999/3448 cut-off events. For 1252/1252 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 20199 event pairs, 12 based on Foata normal form. 0/3040 useless extension candidates. Maximal degree in co-relation 20668. Up to 3220 conditions per place. [2022-12-12 23:20:56,391 INFO L137 encePairwiseOnDemand]: 16/23 looper letters, 1072 selfloop transitions, 526 changer transitions 0/1598 dead transitions. [2022-12-12 23:20:56,391 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 1598 transitions, 35307 flow [2022-12-12 23:20:56,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-12 23:20:56,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-12 23:20:56,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 50 transitions. [2022-12-12 23:20:56,392 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.36231884057971014 [2022-12-12 23:20:56,392 INFO L295 CegarLoopForPetriNet]: 25 programPoint places, 94 predicate places. [2022-12-12 23:20:56,392 INFO L82 GeneralOperation]: Start removeDead. Operand has 119 places, 1598 transitions, 35307 flow [2022-12-12 23:20:56,419 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 119 places, 1598 transitions, 35307 flow [2022-12-12 23:20:56,419 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 1598 transitions, 35307 flow [2022-12-12 23:20:56,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 0 states have call successors, (0), 0 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 23:20:56,419 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:20:56,420 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:20:56,425 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 23:20:56,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:20:56,625 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 23:20:56,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:20:56,625 INFO L85 PathProgramCache]: Analyzing trace with hash 1154534054, now seen corresponding path program 4 times [2022-12-12 23:20:56,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:20:56,626 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195990243] [2022-12-12 23:20:56,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:20:56,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:20:56,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:20:57,218 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 23:20:57,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:20:57,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195990243] [2022-12-12 23:20:57,219 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195990243] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 23:20:57,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356599050] [2022-12-12 23:20:57,219 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-12 23:20:57,219 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:20:57,219 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:20:57,222 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 23:20:57,223 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 23:20:57,297 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-12 23:20:57,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 23:20:57,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 31 conjunts are in the unsatisfiable core [2022-12-12 23:20:57,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 23:20:57,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-12 23:20:57,496 INFO L321 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2022-12-12 23:20:57,497 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 37 treesize of output 44 [2022-12-12 23:20:57,503 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2022-12-12 23:20:57,581 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-12-12 23:20:57,613 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-12 23:20:57,613 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 23:20:57,735 WARN L837 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_277 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_277) c_~queue~0.base) (+ (* c_~start~0 4) c_~queue~0.offset)) (+ c_~v_old~0 1))) (not (= (mod c_~ok~0 256) 0))) is different from false [2022-12-12 23:20:57,844 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 23:20:57,845 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 95 treesize of output 140 [2022-12-12 23:20:57,851 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 36 [2022-12-12 23:20:58,106 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-12 23:20:58,107 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [356599050] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 23:20:58,107 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 23:20:58,107 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 25 [2022-12-12 23:20:58,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505797550] [2022-12-12 23:20:58,107 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 23:20:58,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-12-12 23:20:58,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:20:58,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-12-12 23:20:58,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=521, Unknown=1, NotChecked=48, Total=702 [2022-12-12 23:20:58,108 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 23 [2022-12-12 23:20:58,108 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 1598 transitions, 35307 flow. Second operand has 27 states, 26 states have (on average 2.423076923076923) internal successors, (63), 26 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 23:20:58,108 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:20:58,108 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 23 [2022-12-12 23:20:58,109 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:21:00,424 INFO L130 PetriNetUnfolder]: 2884/4947 cut-off events. [2022-12-12 23:21:00,425 INFO L131 PetriNetUnfolder]: For 1697/1697 co-relation queries the response was YES. [2022-12-12 23:21:00,428 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59171 conditions, 4947 events. 2884/4947 cut-off events. For 1697/1697 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 31030 event pairs, 4 based on Foata normal form. 6/4375 useless extension candidates. Maximal degree in co-relation 29708. Up to 4637 conditions per place. [2022-12-12 23:21:00,452 INFO L137 encePairwiseOnDemand]: 11/23 looper letters, 1789 selfloop transitions, 388 changer transitions 51/2228 dead transitions. [2022-12-12 23:21:00,452 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 2228 transitions, 53739 flow [2022-12-12 23:21:00,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-12-12 23:21:00,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2022-12-12 23:21:00,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 145 transitions. [2022-12-12 23:21:00,453 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.3318077803203661 [2022-12-12 23:21:00,454 INFO L295 CegarLoopForPetriNet]: 25 programPoint places, 112 predicate places. [2022-12-12 23:21:00,454 INFO L82 GeneralOperation]: Start removeDead. Operand has 137 places, 2228 transitions, 53739 flow [2022-12-12 23:21:00,492 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 136 places, 2177 transitions, 52479 flow [2022-12-12 23:21:00,492 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 2177 transitions, 52479 flow [2022-12-12 23:21:00,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.423076923076923) internal successors, (63), 26 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 23:21:00,493 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:21:00,493 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 23:21:00,500 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 23:21:00,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:21:00,698 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 23:21:00,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:21:00,698 INFO L85 PathProgramCache]: Analyzing trace with hash -1202171484, now seen corresponding path program 5 times [2022-12-12 23:21:00,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:21:00,699 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172683499] [2022-12-12 23:21:00,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:21:00,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:21:00,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:21:00,840 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-12 23:21:00,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:21:00,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172683499] [2022-12-12 23:21:00,841 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172683499] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 23:21:00,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [747561464] [2022-12-12 23:21:00,841 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-12 23:21:00,841 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:21:00,841 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:21:00,857 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 23:21:00,858 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 23:21:00,930 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-12 23:21:00,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 23:21:00,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-12 23:21:00,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 23:21:00,957 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-12 23:21:00,957 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 23:21:01,034 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-12 23:21:01,035 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [747561464] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 23:21:01,036 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 23:21:01,036 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3, 4] total 9 [2022-12-12 23:21:01,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588757434] [2022-12-12 23:21:01,037 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 23:21:01,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-12 23:21:01,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:21:01,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-12 23:21:01,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2022-12-12 23:21:01,039 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 23 [2022-12-12 23:21:01,039 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 2177 transitions, 52479 flow. Second operand has 10 states, 10 states have (on average 5.5) internal successors, (55), 9 states have internal predecessors, (55), 0 states have call successors, (0), 0 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 23:21:01,039 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:21:01,039 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 23 [2022-12-12 23:21:01,039 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:21:03,440 INFO L130 PetriNetUnfolder]: 3543/6309 cut-off events. [2022-12-12 23:21:03,440 INFO L131 PetriNetUnfolder]: For 1965/1965 co-relation queries the response was YES. [2022-12-12 23:21:03,445 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81795 conditions, 6309 events. 3543/6309 cut-off events. For 1965/1965 co-relation queries the response was YES. Maximal size of possible extension queue 294. Compared 41916 event pairs, 8 based on Foata normal form. 400/5969 useless extension candidates. Maximal degree in co-relation 36576. Up to 5929 conditions per place. [2022-12-12 23:21:03,476 INFO L137 encePairwiseOnDemand]: 19/23 looper letters, 2133 selfloop transitions, 330 changer transitions 379/2842 dead transitions. [2022-12-12 23:21:03,477 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 2842 transitions, 74279 flow [2022-12-12 23:21:03,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-12 23:21:03,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-12 23:21:03,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 73 transitions. [2022-12-12 23:21:03,478 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.453416149068323 [2022-12-12 23:21:03,478 INFO L295 CegarLoopForPetriNet]: 25 programPoint places, 113 predicate places. [2022-12-12 23:21:03,478 INFO L82 GeneralOperation]: Start removeDead. Operand has 138 places, 2842 transitions, 74279 flow [2022-12-12 23:21:03,527 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 138 places, 2463 transitions, 64199 flow [2022-12-12 23:21:03,527 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 2463 transitions, 64199 flow [2022-12-12 23:21:03,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.5) internal successors, (55), 9 states have internal predecessors, (55), 0 states have call successors, (0), 0 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 23:21:03,528 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:21:03,528 INFO L214 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:21:03,532 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-12 23:21:03,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-12-12 23:21:03,731 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 23:21:03,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:21:03,731 INFO L85 PathProgramCache]: Analyzing trace with hash 916945206, now seen corresponding path program 6 times [2022-12-12 23:21:03,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:21:03,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109681843] [2022-12-12 23:21:03,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:21:03,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:21:03,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:21:05,286 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 23:21:05,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:21:05,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109681843] [2022-12-12 23:21:05,287 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109681843] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 23:21:05,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1146774553] [2022-12-12 23:21:05,287 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-12 23:21:05,287 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:21:05,288 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:21:05,297 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 23:21:05,298 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 23:21:05,477 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-12-12 23:21:05,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 23:21:05,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 41 conjunts are in the unsatisfiable core [2022-12-12 23:21:05,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 23:21:05,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-12 23:21:05,651 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 14 treesize of output 16 [2022-12-12 23:21:05,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-12 23:21:05,729 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 14 treesize of output 16 [2022-12-12 23:21:05,882 INFO L321 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2022-12-12 23:21:05,883 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 34 treesize of output 10 [2022-12-12 23:21:05,906 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-12 23:21:05,907 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 23:21:10,860 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse1 (* c_~end~0 4)) (.cse3 (+ c_~A~0.offset (* c_~i~0 4)))) (and (forall ((~queue~0.base Int) (~queue~0.offset Int) (v_ArrVal_367 (Array Int Int))) (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_367))) (let ((.cse0 (select .cse2 ~queue~0.base))) (or (< (select .cse0 (+ (* c_~start~0 4) ~queue~0.offset)) (+ c_~v_old~0 1)) (not (= (select .cse0 (+ .cse1 ~queue~0.offset)) (select (select .cse2 c_~A~0.base) .cse3))))))) (or (not (= (mod c_~ok~0 256) 0)) (forall ((~queue~0.base Int) (~queue~0.offset Int) (v_ArrVal_367 (Array Int Int))) (not (let ((.cse4 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_367))) (= (select (select .cse4 ~queue~0.base) (+ .cse1 ~queue~0.offset)) (select (select .cse4 c_~A~0.base) .cse3)))))))) is different from false [2022-12-12 23:21:10,955 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 23:21:10,956 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 1455 treesize of output 1397 [2022-12-12 23:21:10,997 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 23:21:10,998 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 1238 treesize of output 1067 [2022-12-12 23:21:11,052 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 23:21:11,053 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 1022 treesize of output 951 [2022-12-12 23:21:11,126 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 23:21:11,126 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 866 treesize of output 787 [2022-12-12 23:21:25,423 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 1 not checked. [2022-12-12 23:21:25,423 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1146774553] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 23:21:25,423 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 23:21:25,423 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 7] total 31 [2022-12-12 23:21:25,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588236915] [2022-12-12 23:21:25,424 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 23:21:25,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-12-12 23:21:25,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:21:25,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-12-12 23:21:25,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=814, Unknown=2, NotChecked=60, Total=1056 [2022-12-12 23:21:25,425 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 23 [2022-12-12 23:21:25,425 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 2463 transitions, 64199 flow. Second operand has 33 states, 32 states have (on average 2.15625) internal successors, (69), 32 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 23:21:25,425 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:21:25,425 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 23 [2022-12-12 23:21:25,425 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:21:30,712 INFO L130 PetriNetUnfolder]: 5287/9152 cut-off events. [2022-12-12 23:21:30,713 INFO L131 PetriNetUnfolder]: For 2575/2575 co-relation queries the response was YES. [2022-12-12 23:21:30,719 INFO L83 FinitePrefix]: Finished finitePrefix Result has 127819 conditions, 9152 events. 5287/9152 cut-off events. For 2575/2575 co-relation queries the response was YES. Maximal size of possible extension queue 379. Compared 62220 event pairs, 12 based on Foata normal form. 9/8191 useless extension candidates. Maximal degree in co-relation 42998. Up to 8676 conditions per place. [2022-12-12 23:21:30,769 INFO L137 encePairwiseOnDemand]: 10/23 looper letters, 3326 selfloop transitions, 542 changer transitions 103/3971 dead transitions. [2022-12-12 23:21:30,769 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 3971 transitions, 111528 flow [2022-12-12 23:21:30,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-12-12 23:21:30,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-12-12 23:21:30,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 129 transitions. [2022-12-12 23:21:30,771 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.2670807453416149 [2022-12-12 23:21:30,771 INFO L295 CegarLoopForPetriNet]: 25 programPoint places, 133 predicate places. [2022-12-12 23:21:30,771 INFO L82 GeneralOperation]: Start removeDead. Operand has 158 places, 3971 transitions, 111528 flow [2022-12-12 23:21:30,854 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 157 places, 3868 transitions, 108576 flow [2022-12-12 23:21:30,855 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 3868 transitions, 108576 flow [2022-12-12 23:21:30,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 2.15625) internal successors, (69), 32 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 23:21:30,855 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:21:30,855 INFO L214 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:21:30,862 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 23:21:31,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:21:31,061 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 23:21:31,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:21:31,061 INFO L85 PathProgramCache]: Analyzing trace with hash -4857464, now seen corresponding path program 1 times [2022-12-12 23:21:31,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:21:31,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212170571] [2022-12-12 23:21:31,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:21:31,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:21:31,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:21:31,205 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-12 23:21:31,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:21:31,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212170571] [2022-12-12 23:21:31,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212170571] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 23:21:31,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [747997064] [2022-12-12 23:21:31,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:21:31,206 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:21:31,206 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:21:31,207 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 23:21:31,240 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 23:21:31,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:21:31,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-12 23:21:31,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 23:21:31,368 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-12 23:21:31,368 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 23:21:31,418 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-12 23:21:31,418 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [747997064] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 23:21:31,418 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 23:21:31,418 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2022-12-12 23:21:31,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196955811] [2022-12-12 23:21:31,418 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 23:21:31,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-12 23:21:31,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:21:31,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-12 23:21:31,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2022-12-12 23:21:31,420 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 23 [2022-12-12 23:21:31,420 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 3868 transitions, 108576 flow. Second operand has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 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 23:21:31,420 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:21:31,420 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 23 [2022-12-12 23:21:31,420 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:21:37,117 INFO L130 PetriNetUnfolder]: 4736/8327 cut-off events. [2022-12-12 23:21:37,117 INFO L131 PetriNetUnfolder]: For 2536/2536 co-relation queries the response was YES. [2022-12-12 23:21:37,123 INFO L83 FinitePrefix]: Finished finitePrefix Result has 124570 conditions, 8327 events. 4736/8327 cut-off events. For 2536/2536 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 56109 event pairs, 10 based on Foata normal form. 149/7665 useless extension candidates. Maximal degree in co-relation 46078. Up to 7859 conditions per place. [2022-12-12 23:21:37,176 INFO L137 encePairwiseOnDemand]: 14/23 looper letters, 3092 selfloop transitions, 180 changer transitions 382/3654 dead transitions. [2022-12-12 23:21:37,176 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 3654 transitions, 109843 flow [2022-12-12 23:21:37,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-12 23:21:37,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-12-12 23:21:37,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 62 transitions. [2022-12-12 23:21:37,178 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.2995169082125604 [2022-12-12 23:21:37,178 INFO L295 CegarLoopForPetriNet]: 25 programPoint places, 139 predicate places. [2022-12-12 23:21:37,178 INFO L82 GeneralOperation]: Start removeDead. Operand has 164 places, 3654 transitions, 109843 flow [2022-12-12 23:21:37,255 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 156 places, 3272 transitions, 98407 flow [2022-12-12 23:21:37,256 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 3272 transitions, 98407 flow [2022-12-12 23:21:37,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 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 23:21:37,256 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:21:37,257 INFO L214 CegarLoopForPetriNet]: trace histogram [4, 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 23:21:37,262 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-12 23:21:37,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:21:37,461 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 23:21:37,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:21:37,462 INFO L85 PathProgramCache]: Analyzing trace with hash 383317377, now seen corresponding path program 2 times [2022-12-12 23:21:37,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:21:37,462 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441992471] [2022-12-12 23:21:37,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:21:37,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:21:37,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:21:37,732 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-12 23:21:37,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:21:37,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441992471] [2022-12-12 23:21:37,733 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441992471] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 23:21:37,733 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-12 23:21:37,733 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-12 23:21:37,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599368681] [2022-12-12 23:21:37,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 23:21:37,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-12 23:21:37,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:21:37,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-12 23:21:37,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-12 23:21:37,734 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 23 [2022-12-12 23:21:37,734 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 3272 transitions, 98407 flow. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 23:21:37,734 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:21:37,734 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 23 [2022-12-12 23:21:37,734 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:21:41,655 INFO L130 PetriNetUnfolder]: 3901/6724 cut-off events. [2022-12-12 23:21:41,655 INFO L131 PetriNetUnfolder]: For 1780/1780 co-relation queries the response was YES. [2022-12-12 23:21:41,660 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107397 conditions, 6724 events. 3901/6724 cut-off events. For 1780/1780 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 42553 event pairs, 4 based on Foata normal form. 0/6029 useless extension candidates. Maximal degree in co-relation 48744. Up to 6414 conditions per place. [2022-12-12 23:21:41,702 INFO L137 encePairwiseOnDemand]: 17/23 looper letters, 2857 selfloop transitions, 80 changer transitions 0/2937 dead transitions. [2022-12-12 23:21:41,702 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 2937 transitions, 94225 flow [2022-12-12 23:21:41,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-12 23:21:41,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-12 23:21:41,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 39 transitions. [2022-12-12 23:21:41,703 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.42391304347826086 [2022-12-12 23:21:41,703 INFO L295 CegarLoopForPetriNet]: 25 programPoint places, 133 predicate places. [2022-12-12 23:21:41,703 INFO L82 GeneralOperation]: Start removeDead. Operand has 158 places, 2937 transitions, 94225 flow [2022-12-12 23:21:41,773 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 158 places, 2937 transitions, 94225 flow [2022-12-12 23:21:41,774 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 2937 transitions, 94225 flow [2022-12-12 23:21:41,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 23:21:41,774 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:21:41,774 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:21:41,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-12-12 23:21:41,774 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 23:21:41,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:21:41,774 INFO L85 PathProgramCache]: Analyzing trace with hash -109491071, now seen corresponding path program 7 times [2022-12-12 23:21:41,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:21:41,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379173091] [2022-12-12 23:21:41,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:21:41,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:21:41,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:21:41,866 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-12 23:21:41,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:21:41,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379173091] [2022-12-12 23:21:41,867 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379173091] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 23:21:41,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [238443098] [2022-12-12 23:21:41,867 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-12 23:21:41,867 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:21:41,867 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:21:41,868 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 23:21:41,912 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 23:21:41,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:21:41,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-12 23:21:41,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 23:21:42,053 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-12 23:21:42,053 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 23:21:42,107 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-12 23:21:42,108 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [238443098] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 23:21:42,108 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 23:21:42,108 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2022-12-12 23:21:42,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45888894] [2022-12-12 23:21:42,108 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 23:21:42,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-12 23:21:42,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:21:42,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-12 23:21:42,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-12-12 23:21:42,109 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 23 [2022-12-12 23:21:42,109 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 2937 transitions, 94225 flow. Second operand has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 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 23:21:42,109 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:21:42,109 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 23 [2022-12-12 23:21:42,109 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:21:45,173 INFO L130 PetriNetUnfolder]: 2799/4922 cut-off events. [2022-12-12 23:21:45,173 INFO L131 PetriNetUnfolder]: For 1507/1507 co-relation queries the response was YES. [2022-12-12 23:21:45,176 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83503 conditions, 4922 events. 2799/4922 cut-off events. For 1507/1507 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 30200 event pairs, 4 based on Foata normal form. 53/4450 useless extension candidates. Maximal degree in co-relation 39100. Up to 4654 conditions per place. [2022-12-12 23:21:45,200 INFO L137 encePairwiseOnDemand]: 19/23 looper letters, 1724 selfloop transitions, 3 changer transitions 478/2205 dead transitions. [2022-12-12 23:21:45,201 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 2205 transitions, 75121 flow [2022-12-12 23:21:45,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-12 23:21:45,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-12 23:21:45,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 48 transitions. [2022-12-12 23:21:45,201 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.34782608695652173 [2022-12-12 23:21:45,202 INFO L295 CegarLoopForPetriNet]: 25 programPoint places, 136 predicate places. [2022-12-12 23:21:45,202 INFO L82 GeneralOperation]: Start removeDead. Operand has 161 places, 2205 transitions, 75121 flow [2022-12-12 23:21:45,239 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 118 places, 1727 transitions, 58891 flow [2022-12-12 23:21:45,239 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 1727 transitions, 58891 flow [2022-12-12 23:21:45,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 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 23:21:45,240 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:21:45,240 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:21:45,246 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-12 23:21:45,444 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,SelfDestructingSolverStorable15 [2022-12-12 23:21:45,445 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 23:21:45,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:21:45,445 INFO L85 PathProgramCache]: Analyzing trace with hash -920421113, now seen corresponding path program 8 times [2022-12-12 23:21:45,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:21:45,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167199138] [2022-12-12 23:21:45,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:21:45,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:21:45,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:21:46,489 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 23:21:46,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:21:46,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167199138] [2022-12-12 23:21:46,489 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167199138] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 23:21:46,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [650601172] [2022-12-12 23:21:46,489 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-12 23:21:46,489 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:21:46,489 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:21:46,500 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 23:21:46,502 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 23:21:46,593 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-12 23:21:46,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 23:21:46,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 64 conjunts are in the unsatisfiable core [2022-12-12 23:21:46,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 23:21:46,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-12 23:21:46,776 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 14 treesize of output 16 [2022-12-12 23:21:46,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-12 23:21:46,866 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 14 treesize of output 16 [2022-12-12 23:21:47,417 INFO L321 Elim1Store]: treesize reduction 34, result has 56.4 percent of original size [2022-12-12 23:21:47,418 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 68 treesize of output 59 [2022-12-12 23:21:47,449 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 23:21:47,450 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 23:21:50,479 INFO L321 Elim1Store]: treesize reduction 192, result has 85.0 percent of original size [2022-12-12 23:21:50,481 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 14 select indices, 14 select index equivalence classes, 0 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 91 case distinctions, treesize of input 7736 treesize of output 7648 [2022-12-12 23:21:50,941 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 23:21:50,942 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 2 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 26 case distinctions, treesize of input 6558 treesize of output 6062 [2022-12-12 23:21:51,315 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 23:21:51,316 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 2 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 13 case distinctions, treesize of input 5673 treesize of output 5396 [2022-12-12 23:21:51,621 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 23:21:51,629 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 5199 treesize of output 4888 [2022-12-12 23:21:51,916 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 23:21:51,917 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 4751 treesize of output 3982 Received shutdown request... [2022-12-12 23:33:24,151 WARN L249 SmtUtils]: Removed 2 from assertion stack [2022-12-12 23:33:24,152 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2022-12-12 23:33:24,160 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 23:33:24,173 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 23:33:24,173 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-12-12 23:33:24,358 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,SelfDestructingSolverStorable16 [2022-12-12 23:33:24,358 WARN L619 AbstractCegarLoop]: Verification canceled: while CegarLoopForPetriNet was analyzing trace of length 29 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 4 for 21ms.. [2022-12-12 23:33:24,360 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2022-12-12 23:33:24,360 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2022-12-12 23:33:24,360 INFO L445 BasicCegarLoop]: Path program histogram: [8, 3, 2, 1, 1, 1, 1] [2022-12-12 23:33:24,376 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-12-12 23:33:24,376 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-12-12 23:33:24,380 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.12 11:33:24 BasicIcfg [2022-12-12 23:33:24,380 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-12-12 23:33:24,381 INFO L158 Benchmark]: Toolchain (without parser) took 854406.37ms. Allocated memory was 204.5MB in the beginning and 1.6GB in the end (delta: 1.4GB). Free memory was 179.9MB in the beginning and 1.1GB in the end (delta: -945.8MB). Peak memory consumption was 1.4GB. Max. memory is 8.0GB. [2022-12-12 23:33:24,381 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 204.5MB. Free memory is still 181.1MB. There was no memory consumed. Max. memory is 8.0GB. [2022-12-12 23:33:24,381 INFO L158 Benchmark]: CACSL2BoogieTranslator took 204.51ms. Allocated memory is still 204.5MB. Free memory was 179.8MB in the beginning and 166.7MB in the end (delta: 13.1MB). Peak memory consumption was 13.6MB. Max. memory is 8.0GB. [2022-12-12 23:33:24,381 INFO L158 Benchmark]: Boogie Procedure Inliner took 46.77ms. Allocated memory is still 204.5MB. Free memory was 166.7MB in the beginning and 164.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-12-12 23:33:24,381 INFO L158 Benchmark]: Boogie Preprocessor took 32.00ms. Allocated memory is still 204.5MB. Free memory was 164.6MB in the beginning and 163.0MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-12-12 23:33:24,382 INFO L158 Benchmark]: RCFGBuilder took 520.33ms. Allocated memory is still 204.5MB. Free memory was 163.0MB in the beginning and 138.3MB in the end (delta: 24.6MB). Peak memory consumption was 25.2MB. Max. memory is 8.0GB. [2022-12-12 23:33:24,383 INFO L158 Benchmark]: TraceAbstraction took 853597.61ms. Allocated memory was 204.5MB in the beginning and 1.6GB in the end (delta: 1.4GB). Free memory was 137.3MB in the beginning and 1.1GB in the end (delta: -988.4MB). Peak memory consumption was 1.4GB. Max. memory is 8.0GB. [2022-12-12 23:33:24,384 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 204.5MB. Free memory is still 181.1MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 204.51ms. Allocated memory is still 204.5MB. Free memory was 179.8MB in the beginning and 166.7MB in the end (delta: 13.1MB). Peak memory consumption was 13.6MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 46.77ms. Allocated memory is still 204.5MB. Free memory was 166.7MB in the beginning and 164.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 32.00ms. Allocated memory is still 204.5MB. Free memory was 164.6MB in the beginning and 163.0MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 520.33ms. Allocated memory is still 204.5MB. Free memory was 163.0MB in the beginning and 138.3MB in the end (delta: 24.6MB). Peak memory consumption was 25.2MB. Max. memory is 8.0GB. * TraceAbstraction took 853597.61ms. Allocated memory was 204.5MB in the beginning and 1.6GB in the end (delta: 1.4GB). Free memory was 137.3MB in the beginning and 1.1GB in the end (delta: -988.4MB). Peak memory consumption was 1.4GB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 5.1s, 155 PlacesBefore, 25 PlacesAfterwards, 163 TransitionsBefore, 23 TransitionsAfterwards, 690 CoEnabledTransitionPairs, 3 FixpointIterations, 0 TrivialSequentialCompositions, 0 ConcurrentSequentialCompositions, 110 TrivialYvCompositions, 20 ConcurrentYvCompositions, 10 ChoiceCompositions, 140 TotalNumberOfCompositions, Independence Relation Statistics: ConditionTransformingIndependenceRelation.Independence Queries: [ total: 482, independent: 454, independent conditional: 454, independent unconditional: 0, dependent: 28, dependent conditional: 28, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ConditionTransformingIndependenceRelation.Statistics on underlying relation: DisjunctiveConditionalIndependenceRelation.Independence Queries: [ total: 482, independent: 454, independent conditional: 0, independent unconditional: 454, dependent: 28, dependent conditional: 0, dependent unconditional: 28, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , DisjunctiveConditionalIndependenceRelation.Statistics on underlying relation: SemanticConditionEliminator.Independence Queries: [ total: 482, independent: 454, independent conditional: 0, independent unconditional: 454, dependent: 28, dependent conditional: 0, dependent unconditional: 28, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticConditionEliminator.Statistics on underlying relation: CachedIndependenceRelation.Independence Queries: [ total: 482, independent: 454, independent conditional: 0, independent unconditional: 454, dependent: 28, dependent conditional: 0, dependent unconditional: 28, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 423, independent: 408, independent conditional: 0, independent unconditional: 408, dependent: 15, dependent conditional: 0, dependent unconditional: 15, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 423, independent: 407, independent conditional: 0, independent unconditional: 407, dependent: 16, dependent conditional: 0, dependent unconditional: 16, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 16, independent: 1, independent conditional: 0, independent unconditional: 1, dependent: 15, dependent conditional: 0, dependent unconditional: 15, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 45, independent: 3, independent conditional: 0, independent unconditional: 3, dependent: 42, dependent conditional: 0, dependent unconditional: 42, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 482, independent: 46, independent conditional: 0, independent unconditional: 46, dependent: 13, dependent conditional: 0, dependent unconditional: 13, unknown: 423, unknown conditional: 0, unknown unconditional: 423] , Statistics on independence cache: Total cache size (in pairs): 638, Positive cache size: 623, Positive conditional cache size: 0, Positive unconditional cache size: 623, Negative cache size: 15, Negative conditional cache size: 0, Negative unconditional cache size: 15, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0, Eliminated conditions: 0, Maximal queried relation: -1 - TimeoutResultAtElement [Line: 107]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while CegarLoopForPetriNet was analyzing trace of length 29 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 4 for 21ms.. - 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 analyzing trace of length 29 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 4 for 21ms.. - TimeoutResultAtElement [Line: 101]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while CegarLoopForPetriNet was analyzing trace of length 29 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 4 for 21ms.. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 183 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.4s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 853.5s, OverallIterations: 17, TraceHistogramMax: 4, PathProgramHistogramMax: 8, EmptinessCheckTime: 0.0s, AutomataDifference: 105.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 5.3s, HoareTripleCheckerStatistics: 155 mSolverCounterUnknown, 2029 SdHoareTripleChecker+Valid, 8.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2029 mSDsluCounter, 10 SdHoareTripleChecker+Invalid, 8.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 168 IncrementalHoareTripleChecker+Unchecked, 6 mSDsCounter, 317 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 5320 IncrementalHoareTripleChecker+Invalid, 5960 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 317 mSolverCounterUnsat, 4 mSDtfsCounter, 5320 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 155 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 555 GetRequests, 272 SyntacticMatches, 10 SemanticMatches, 273 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 2792 ImplicationChecksByTransitivity, 81.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=108576occurred in iteration=13, InterpolantAutomatonStates: 180, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.4s AutomataMinimizationTime, 16 MinimizatonAttempts, 47297 StatesRemovedByMinimization, 16 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.8s SatisfiabilityAnalysisTime, 40.3s InterpolantComputationTime, 512 NumberOfCodeBlocks, 512 NumberOfCodeBlocksAsserted, 31 NumberOfCheckSat, 663 ConstructedInterpolants, 45 QuantifiedInterpolants, 9064 SizeOfPredicates, 112 NumberOfNonLiveVariables, 2109 ConjunctsInSsa, 196 ConjunctsInUnsatCore, 32 InterpolantComputations, 8 PerfectInterpolantSequences, 149/219 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