/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/popl20-two-queue.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.repeated-lipton-8d0d62b [2022-12-05 22:15:02,170 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-05 22:15:02,171 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-05 22:15:02,189 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-05 22:15:02,190 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-05 22:15:02,190 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-05 22:15:02,191 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-05 22:15:02,192 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-05 22:15:02,193 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-05 22:15:02,194 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-05 22:15:02,195 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-05 22:15:02,195 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-05 22:15:02,196 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-05 22:15:02,196 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-05 22:15:02,197 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-05 22:15:02,197 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-05 22:15:02,198 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-05 22:15:02,199 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-05 22:15:02,200 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-05 22:15:02,201 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-05 22:15:02,202 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-05 22:15:02,216 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-05 22:15:02,217 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-05 22:15:02,217 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-05 22:15:02,219 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-05 22:15:02,220 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-05 22:15:02,220 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-05 22:15:02,220 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-05 22:15:02,221 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-05 22:15:02,221 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-05 22:15:02,222 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-05 22:15:02,222 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-05 22:15:02,223 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-05 22:15:02,223 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-05 22:15:02,224 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-05 22:15:02,224 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-05 22:15:02,224 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-05 22:15:02,225 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-05 22:15:02,225 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-05 22:15:02,225 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-05 22:15:02,226 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-05 22:15:02,231 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 [2022-12-05 22:15:02,252 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-05 22:15:02,252 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-05 22:15:02,253 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-05 22:15:02,254 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-05 22:15:02,254 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-05 22:15:02,255 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-05 22:15:02,255 INFO L138 SettingsManager]: * Use SBE=true [2022-12-05 22:15:02,255 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-05 22:15:02,255 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-05 22:15:02,255 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-05 22:15:02,256 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-05 22:15:02,256 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-05 22:15:02,256 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-05 22:15:02,256 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-05 22:15:02,256 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-05 22:15:02,256 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-05 22:15:02,256 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-05 22:15:02,256 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-05 22:15:02,257 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-05 22:15:02,257 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-05 22:15:02,257 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-05 22:15:02,257 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-12-05 22:15:02,257 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-05 22:15:02,257 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-05 22:15:02,257 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-05 22:15:02,257 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-05 22:15:02,258 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-05 22:15:02,258 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-05 22:15:02,258 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-05 22:15:02,258 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-05 22:15:02,258 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-12-05 22:15:02,508 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-05 22:15:02,527 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-05 22:15:02,529 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-05 22:15:02,530 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-05 22:15:02,531 INFO L275 PluginConnector]: CDTParser initialized [2022-12-05 22:15:02,533 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-two-queue.wvr.c [2022-12-05 22:15:03,513 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-05 22:15:03,747 INFO L351 CDTParser]: Found 1 translation units. [2022-12-05 22:15:03,747 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-two-queue.wvr.c [2022-12-05 22:15:03,754 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/47757ed78/46d416ed9a744c449de9d7067f9dbb49/FLAG0c9408de1 [2022-12-05 22:15:03,765 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/47757ed78/46d416ed9a744c449de9d7067f9dbb49 [2022-12-05 22:15:03,767 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-05 22:15:03,771 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-12-05 22:15:03,771 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-05 22:15:03,772 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-05 22:15:03,773 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-05 22:15:03,774 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.12 10:15:03" (1/1) ... [2022-12-05 22:15:03,775 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@62bd46c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 10:15:03, skipping insertion in model container [2022-12-05 22:15:03,775 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.12 10:15:03" (1/1) ... [2022-12-05 22:15:03,779 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-05 22:15:03,798 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-05 22:15:03,914 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 22:15:03,918 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 22:15:03,919 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 22:15:03,921 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 22:15:03,925 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 22:15:03,925 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 22:15:03,926 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 22:15:03,933 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 22:15:03,944 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-two-queue.wvr.c[2987,3000] [2022-12-05 22:15:03,958 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-05 22:15:03,966 INFO L203 MainTranslator]: Completed pre-run [2022-12-05 22:15:03,976 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 22:15:03,980 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 22:15:03,980 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 22:15:03,983 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 22:15:03,984 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 22:15:03,985 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 22:15:03,985 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 22:15:03,991 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 22:15:03,999 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-two-queue.wvr.c[2987,3000] [2022-12-05 22:15:04,007 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-05 22:15:04,019 INFO L208 MainTranslator]: Completed translation [2022-12-05 22:15:04,021 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 10:15:04 WrapperNode [2022-12-05 22:15:04,021 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-05 22:15:04,022 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-05 22:15:04,022 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-05 22:15:04,023 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-05 22:15:04,027 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 10:15:04" (1/1) ... [2022-12-05 22:15:04,037 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 10:15:04" (1/1) ... [2022-12-05 22:15:04,054 INFO L138 Inliner]: procedures = 24, calls = 43, calls flagged for inlining = 13, calls inlined = 15, statements flattened = 200 [2022-12-05 22:15:04,055 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-05 22:15:04,058 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-05 22:15:04,058 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-05 22:15:04,058 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-05 22:15:04,065 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 10:15:04" (1/1) ... [2022-12-05 22:15:04,067 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 10:15:04" (1/1) ... [2022-12-05 22:15:04,078 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 10:15:04" (1/1) ... [2022-12-05 22:15:04,079 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 10:15:04" (1/1) ... [2022-12-05 22:15:04,088 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 10:15:04" (1/1) ... [2022-12-05 22:15:04,091 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 10:15:04" (1/1) ... [2022-12-05 22:15:04,093 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 10:15:04" (1/1) ... [2022-12-05 22:15:04,093 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 10:15:04" (1/1) ... [2022-12-05 22:15:04,095 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-05 22:15:04,096 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-05 22:15:04,096 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-05 22:15:04,096 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-05 22:15:04,097 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 10:15:04" (1/1) ... [2022-12-05 22:15:04,100 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-05 22:15:04,116 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 22:15:04,145 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) [2022-12-05 22:15:04,166 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 [2022-12-05 22:15:04,195 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-05 22:15:04,195 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-12-05 22:15:04,195 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-12-05 22:15:04,195 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-12-05 22:15:04,195 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-12-05 22:15:04,195 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-05 22:15:04,195 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-05 22:15:04,196 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-05 22:15:04,196 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-12-05 22:15:04,196 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-12-05 22:15:04,196 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-05 22:15:04,196 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-05 22:15:04,196 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-05 22:15:04,196 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-05 22:15:04,196 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-05 22:15:04,197 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2022-12-05 22:15:04,318 INFO L236 CfgBuilder]: Building ICFG [2022-12-05 22:15:04,319 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-05 22:15:04,558 INFO L277 CfgBuilder]: Performing block encoding [2022-12-05 22:15:04,680 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-05 22:15:04,681 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2022-12-05 22:15:04,682 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.12 10:15:04 BoogieIcfgContainer [2022-12-05 22:15:04,682 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-05 22:15:04,684 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-05 22:15:04,684 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-05 22:15:04,686 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-05 22:15:04,686 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.12 10:15:03" (1/3) ... [2022-12-05 22:15:04,686 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f1b8dd6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.12 10:15:04, skipping insertion in model container [2022-12-05 22:15:04,686 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 10:15:04" (2/3) ... [2022-12-05 22:15:04,687 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f1b8dd6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.12 10:15:04, skipping insertion in model container [2022-12-05 22:15:04,687 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.12 10:15:04" (3/3) ... [2022-12-05 22:15:04,687 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-two-queue.wvr.c [2022-12-05 22:15:04,699 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-05 22:15:04,699 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-05 22:15:04,699 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-05 22:15:04,753 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-12-05 22:15:04,787 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 157 places, 163 transitions, 342 flow [2022-12-05 22:15:04,855 INFO L130 PetriNetUnfolder]: 13/161 cut-off events. [2022-12-05 22:15:04,855 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-05 22:15:04,859 INFO L83 FinitePrefix]: Finished finitePrefix Result has 170 conditions, 161 events. 13/161 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 81 event pairs, 0 based on Foata normal form. 0/147 useless extension candidates. Maximal degree in co-relation 128. Up to 2 conditions per place. [2022-12-05 22:15:04,859 INFO L82 GeneralOperation]: Start removeDead. Operand has 157 places, 163 transitions, 342 flow [2022-12-05 22:15:04,862 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 147 places, 153 transitions, 318 flow [2022-12-05 22:15:04,863 INFO L195 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-05 22:15:04,879 INFO L167 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 147 places, 153 transitions, 318 flow [2022-12-05 22:15:04,884 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 147 places, 153 transitions, 318 flow [2022-12-05 22:15:04,944 INFO L130 PetriNetUnfolder]: 13/153 cut-off events. [2022-12-05 22:15:04,944 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-05 22:15:04,945 INFO L83 FinitePrefix]: Finished finitePrefix Result has 162 conditions, 153 events. 13/153 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 81 event pairs, 0 based on Foata normal form. 0/140 useless extension candidates. Maximal degree in co-relation 128. Up to 2 conditions per place. [2022-12-05 22:15:04,946 INFO L184 LiptonReduction]: Starting Lipton reduction on Petri net that has 147 places, 153 transitions, 318 flow [2022-12-05 22:15:04,946 INFO L188 LiptonReduction]: Number of co-enabled transitions 500 [2022-12-05 22:15:10,534 INFO L203 LiptonReduction]: Total number of compositions: 134 [2022-12-05 22:15:10,545 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-05 22:15:10,550 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;@2ae41261, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, Conditionality=CONDITIONAL_DISJUNCTIVE, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-05 22:15:10,550 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-12-05 22:15:10,554 INFO L130 PetriNetUnfolder]: 4/18 cut-off events. [2022-12-05 22:15:10,554 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-05 22:15:10,554 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 22:15:10,555 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 22:15:10,555 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 22:15:10,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 22:15:10,558 INFO L85 PathProgramCache]: Analyzing trace with hash -737479510, now seen corresponding path program 1 times [2022-12-05 22:15:10,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 22:15:10,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342883465] [2022-12-05 22:15:10,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 22:15:10,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 22:15:10,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 22:15:10,980 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 22:15:10,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 22:15:10,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342883465] [2022-12-05 22:15:10,981 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342883465] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-05 22:15:10,981 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-05 22:15:10,981 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-05 22:15:10,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108147548] [2022-12-05 22:15:10,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 22:15:10,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-05 22:15:10,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 22:15:11,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-05 22:15:11,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-05 22:15:11,001 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 19 [2022-12-05 22:15:11,002 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 19 transitions, 50 flow. Second operand has 3 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 22:15:11,002 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 22:15:11,002 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 19 [2022-12-05 22:15:11,003 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 22:15:11,059 INFO L130 PetriNetUnfolder]: 81/147 cut-off events. [2022-12-05 22:15:11,059 INFO L131 PetriNetUnfolder]: For 21/21 co-relation queries the response was YES. [2022-12-05 22:15:11,060 INFO L83 FinitePrefix]: Finished finitePrefix Result has 320 conditions, 147 events. 81/147 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 424 event pairs, 24 based on Foata normal form. 1/114 useless extension candidates. Maximal degree in co-relation 240. Up to 88 conditions per place. [2022-12-05 22:15:11,061 INFO L137 encePairwiseOnDemand]: 15/19 looper letters, 27 selfloop transitions, 3 changer transitions 1/31 dead transitions. [2022-12-05 22:15:11,061 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 31 transitions, 145 flow [2022-12-05 22:15:11,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-05 22:15:11,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-05 22:15:11,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 32 transitions. [2022-12-05 22:15:11,069 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.5614035087719298 [2022-12-05 22:15:11,070 INFO L175 Difference]: Start difference. First operand has 22 places, 19 transitions, 50 flow. Second operand 3 states and 32 transitions. [2022-12-05 22:15:11,071 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 31 transitions, 145 flow [2022-12-05 22:15:11,072 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 31 transitions, 131 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-12-05 22:15:11,074 INFO L231 Difference]: Finished difference. Result has 21 places, 21 transitions, 61 flow [2022-12-05 22:15:11,075 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=42, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=61, PETRI_PLACES=21, PETRI_TRANSITIONS=21} [2022-12-05 22:15:11,078 INFO L294 CegarLoopForPetriNet]: 22 programPoint places, -1 predicate places. [2022-12-05 22:15:11,078 INFO L495 AbstractCegarLoop]: Abstraction has has 21 places, 21 transitions, 61 flow [2022-12-05 22:15:11,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 22:15:11,079 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 22:15:11,079 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 22:15:11,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-05 22:15:11,080 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 22:15:11,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 22:15:11,081 INFO L85 PathProgramCache]: Analyzing trace with hash 1426168016, now seen corresponding path program 1 times [2022-12-05 22:15:11,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 22:15:11,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751737827] [2022-12-05 22:15:11,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 22:15:11,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 22:15:11,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 22:15:11,179 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 22:15:11,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 22:15:11,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751737827] [2022-12-05 22:15:11,184 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751737827] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-05 22:15:11,184 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-05 22:15:11,184 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-05 22:15:11,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043783439] [2022-12-05 22:15:11,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 22:15:11,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-05 22:15:11,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 22:15:11,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-05 22:15:11,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-05 22:15:11,186 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 19 [2022-12-05 22:15:11,186 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 21 transitions, 61 flow. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 22:15:11,187 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 22:15:11,187 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 19 [2022-12-05 22:15:11,187 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 22:15:11,274 INFO L130 PetriNetUnfolder]: 77/143 cut-off events. [2022-12-05 22:15:11,274 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2022-12-05 22:15:11,275 INFO L83 FinitePrefix]: Finished finitePrefix Result has 347 conditions, 143 events. 77/143 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 428 event pairs, 11 based on Foata normal form. 0/113 useless extension candidates. Maximal degree in co-relation 114. Up to 88 conditions per place. [2022-12-05 22:15:11,277 INFO L137 encePairwiseOnDemand]: 13/19 looper letters, 27 selfloop transitions, 7 changer transitions 5/39 dead transitions. [2022-12-05 22:15:11,277 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 39 transitions, 185 flow [2022-12-05 22:15:11,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-05 22:15:11,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-05 22:15:11,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 40 transitions. [2022-12-05 22:15:11,280 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.5263157894736842 [2022-12-05 22:15:11,280 INFO L175 Difference]: Start difference. First operand has 21 places, 21 transitions, 61 flow. Second operand 4 states and 40 transitions. [2022-12-05 22:15:11,280 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 39 transitions, 185 flow [2022-12-05 22:15:11,280 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 39 transitions, 180 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-05 22:15:11,281 INFO L231 Difference]: Finished difference. Result has 25 places, 25 transitions, 99 flow [2022-12-05 22:15:11,281 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=58, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=99, PETRI_PLACES=25, PETRI_TRANSITIONS=25} [2022-12-05 22:15:11,282 INFO L294 CegarLoopForPetriNet]: 22 programPoint places, 3 predicate places. [2022-12-05 22:15:11,282 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 25 transitions, 99 flow [2022-12-05 22:15:11,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 22:15:11,282 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 22:15:11,282 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 22:15:11,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-05 22:15:11,282 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 22:15:11,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 22:15:11,285 INFO L85 PathProgramCache]: Analyzing trace with hash 1982189810, now seen corresponding path program 2 times [2022-12-05 22:15:11,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 22:15:11,286 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9824050] [2022-12-05 22:15:11,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 22:15:11,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 22:15:11,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 22:15:11,363 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 22:15:11,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 22:15:11,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9824050] [2022-12-05 22:15:11,366 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9824050] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-05 22:15:11,366 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-05 22:15:11,366 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-05 22:15:11,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847747811] [2022-12-05 22:15:11,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 22:15:11,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-05 22:15:11,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 22:15:11,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-05 22:15:11,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-05 22:15:11,367 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 19 [2022-12-05 22:15:11,367 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 25 transitions, 99 flow. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 22:15:11,367 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 22:15:11,367 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 19 [2022-12-05 22:15:11,368 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 22:15:11,444 INFO L130 PetriNetUnfolder]: 88/162 cut-off events. [2022-12-05 22:15:11,445 INFO L131 PetriNetUnfolder]: For 72/72 co-relation queries the response was YES. [2022-12-05 22:15:11,447 INFO L83 FinitePrefix]: Finished finitePrefix Result has 456 conditions, 162 events. 88/162 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 490 event pairs, 13 based on Foata normal form. 10/170 useless extension candidates. Maximal degree in co-relation 169. Up to 86 conditions per place. [2022-12-05 22:15:11,448 INFO L137 encePairwiseOnDemand]: 12/19 looper letters, 32 selfloop transitions, 7 changer transitions 6/45 dead transitions. [2022-12-05 22:15:11,449 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 45 transitions, 244 flow [2022-12-05 22:15:11,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-05 22:15:11,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-05 22:15:11,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 45 transitions. [2022-12-05 22:15:11,451 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.47368421052631576 [2022-12-05 22:15:11,451 INFO L175 Difference]: Start difference. First operand has 25 places, 25 transitions, 99 flow. Second operand 5 states and 45 transitions. [2022-12-05 22:15:11,451 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 45 transitions, 244 flow [2022-12-05 22:15:11,452 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 45 transitions, 236 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-05 22:15:11,453 INFO L231 Difference]: Finished difference. Result has 30 places, 26 transitions, 122 flow [2022-12-05 22:15:11,453 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=122, PETRI_PLACES=30, PETRI_TRANSITIONS=26} [2022-12-05 22:15:11,453 INFO L294 CegarLoopForPetriNet]: 22 programPoint places, 8 predicate places. [2022-12-05 22:15:11,453 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 26 transitions, 122 flow [2022-12-05 22:15:11,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 22:15:11,454 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 22:15:11,454 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 22:15:11,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-05 22:15:11,454 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 22:15:11,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 22:15:11,454 INFO L85 PathProgramCache]: Analyzing trace with hash 552214239, now seen corresponding path program 1 times [2022-12-05 22:15:11,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 22:15:11,455 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440498262] [2022-12-05 22:15:11,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 22:15:11,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 22:15:11,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 22:15:11,511 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 22:15:11,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 22:15:11,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440498262] [2022-12-05 22:15:11,511 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440498262] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-05 22:15:11,511 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-05 22:15:11,511 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-05 22:15:11,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610887067] [2022-12-05 22:15:11,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 22:15:11,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-05 22:15:11,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 22:15:11,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-05 22:15:11,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-05 22:15:11,512 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 19 [2022-12-05 22:15:11,512 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 26 transitions, 122 flow. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 22:15:11,513 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 22:15:11,513 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 19 [2022-12-05 22:15:11,513 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 22:15:11,565 INFO L130 PetriNetUnfolder]: 84/167 cut-off events. [2022-12-05 22:15:11,565 INFO L131 PetriNetUnfolder]: For 179/179 co-relation queries the response was YES. [2022-12-05 22:15:11,566 INFO L83 FinitePrefix]: Finished finitePrefix Result has 564 conditions, 167 events. 84/167 cut-off events. For 179/179 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 494 event pairs, 46 based on Foata normal form. 10/174 useless extension candidates. Maximal degree in co-relation 267. Up to 150 conditions per place. [2022-12-05 22:15:11,566 INFO L137 encePairwiseOnDemand]: 14/19 looper letters, 25 selfloop transitions, 2 changer transitions 11/38 dead transitions. [2022-12-05 22:15:11,566 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 38 transitions, 242 flow [2022-12-05 22:15:11,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-05 22:15:11,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-05 22:15:11,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 33 transitions. [2022-12-05 22:15:11,567 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.4342105263157895 [2022-12-05 22:15:11,567 INFO L175 Difference]: Start difference. First operand has 30 places, 26 transitions, 122 flow. Second operand 4 states and 33 transitions. [2022-12-05 22:15:11,568 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 38 transitions, 242 flow [2022-12-05 22:15:11,569 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 38 transitions, 229 flow, removed 3 selfloop flow, removed 2 redundant places. [2022-12-05 22:15:11,569 INFO L231 Difference]: Finished difference. Result has 33 places, 27 transitions, 130 flow [2022-12-05 22:15:11,569 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=130, PETRI_PLACES=33, PETRI_TRANSITIONS=27} [2022-12-05 22:15:11,570 INFO L294 CegarLoopForPetriNet]: 22 programPoint places, 11 predicate places. [2022-12-05 22:15:11,570 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 27 transitions, 130 flow [2022-12-05 22:15:11,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 22:15:11,570 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 22:15:11,570 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 22:15:11,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-05 22:15:11,570 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 22:15:11,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 22:15:11,571 INFO L85 PathProgramCache]: Analyzing trace with hash -2067210422, now seen corresponding path program 1 times [2022-12-05 22:15:11,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 22:15:11,571 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075336538] [2022-12-05 22:15:11,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 22:15:11,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 22:15:11,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 22:15:11,613 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-05 22:15:11,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 22:15:11,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075336538] [2022-12-05 22:15:11,613 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075336538] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 22:15:11,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174257796] [2022-12-05 22:15:11,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 22:15:11,614 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 22:15:11,614 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 22:15:11,616 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) [2022-12-05 22:15:11,678 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-05 22:15:11,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 22:15:11,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-05 22:15:11,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 22:15:11,780 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-05 22:15:11,780 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 22:15:11,801 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-05 22:15:11,801 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1174257796] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 22:15:11,801 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 22:15:11,802 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-12-05 22:15:11,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757322490] [2022-12-05 22:15:11,802 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 22:15:11,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-05 22:15:11,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 22:15:11,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-05 22:15:11,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-12-05 22:15:11,803 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 19 [2022-12-05 22:15:11,803 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 27 transitions, 130 flow. Second operand has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 22:15:11,803 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 22:15:11,803 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 19 [2022-12-05 22:15:11,803 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 22:15:11,913 INFO L130 PetriNetUnfolder]: 109/208 cut-off events. [2022-12-05 22:15:11,913 INFO L131 PetriNetUnfolder]: For 174/174 co-relation queries the response was YES. [2022-12-05 22:15:11,914 INFO L83 FinitePrefix]: Finished finitePrefix Result has 685 conditions, 208 events. 109/208 cut-off events. For 174/174 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 682 event pairs, 2 based on Foata normal form. 8/215 useless extension candidates. Maximal degree in co-relation 662. Up to 77 conditions per place. [2022-12-05 22:15:11,915 INFO L137 encePairwiseOnDemand]: 12/19 looper letters, 48 selfloop transitions, 15 changer transitions 4/67 dead transitions. [2022-12-05 22:15:11,915 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 67 transitions, 412 flow [2022-12-05 22:15:11,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-05 22:15:11,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-12-05 22:15:11,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 65 transitions. [2022-12-05 22:15:11,916 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.38011695906432746 [2022-12-05 22:15:11,916 INFO L175 Difference]: Start difference. First operand has 33 places, 27 transitions, 130 flow. Second operand 9 states and 65 transitions. [2022-12-05 22:15:11,916 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 67 transitions, 412 flow [2022-12-05 22:15:11,917 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 67 transitions, 406 flow, removed 2 selfloop flow, removed 1 redundant places. [2022-12-05 22:15:11,918 INFO L231 Difference]: Finished difference. Result has 43 places, 35 transitions, 226 flow [2022-12-05 22:15:11,918 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=226, PETRI_PLACES=43, PETRI_TRANSITIONS=35} [2022-12-05 22:15:11,919 INFO L294 CegarLoopForPetriNet]: 22 programPoint places, 21 predicate places. [2022-12-05 22:15:11,919 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 35 transitions, 226 flow [2022-12-05 22:15:11,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 22:15:11,919 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 22:15:11,919 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 22:15:11,929 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-05 22:15:12,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 22:15:12,125 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 22:15:12,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 22:15:12,125 INFO L85 PathProgramCache]: Analyzing trace with hash -1539367884, now seen corresponding path program 2 times [2022-12-05 22:15:12,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 22:15:12,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186712343] [2022-12-05 22:15:12,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 22:15:12,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 22:15:12,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 22:15:12,169 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-05 22:15:12,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 22:15:12,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186712343] [2022-12-05 22:15:12,169 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186712343] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-05 22:15:12,169 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-05 22:15:12,169 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-05 22:15:12,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356745113] [2022-12-05 22:15:12,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 22:15:12,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-05 22:15:12,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 22:15:12,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-05 22:15:12,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-05 22:15:12,170 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 19 [2022-12-05 22:15:12,170 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 35 transitions, 226 flow. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 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) [2022-12-05 22:15:12,170 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 22:15:12,171 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 19 [2022-12-05 22:15:12,171 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 22:15:12,223 INFO L130 PetriNetUnfolder]: 102/184 cut-off events. [2022-12-05 22:15:12,223 INFO L131 PetriNetUnfolder]: For 379/379 co-relation queries the response was YES. [2022-12-05 22:15:12,223 INFO L83 FinitePrefix]: Finished finitePrefix Result has 757 conditions, 184 events. 102/184 cut-off events. For 379/379 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 516 event pairs, 17 based on Foata normal form. 2/185 useless extension candidates. Maximal degree in co-relation 725. Up to 157 conditions per place. [2022-12-05 22:15:12,224 INFO L137 encePairwiseOnDemand]: 14/19 looper letters, 33 selfloop transitions, 4 changer transitions 2/39 dead transitions. [2022-12-05 22:15:12,224 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 39 transitions, 310 flow [2022-12-05 22:15:12,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-05 22:15:12,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-05 22:15:12,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 29 transitions. [2022-12-05 22:15:12,225 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.3815789473684211 [2022-12-05 22:15:12,225 INFO L175 Difference]: Start difference. First operand has 43 places, 35 transitions, 226 flow. Second operand 4 states and 29 transitions. [2022-12-05 22:15:12,225 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 39 transitions, 310 flow [2022-12-05 22:15:12,226 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 39 transitions, 284 flow, removed 9 selfloop flow, removed 2 redundant places. [2022-12-05 22:15:12,227 INFO L231 Difference]: Finished difference. Result has 45 places, 33 transitions, 194 flow [2022-12-05 22:15:12,227 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=191, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=194, PETRI_PLACES=45, PETRI_TRANSITIONS=33} [2022-12-05 22:15:12,227 INFO L294 CegarLoopForPetriNet]: 22 programPoint places, 23 predicate places. [2022-12-05 22:15:12,228 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 33 transitions, 194 flow [2022-12-05 22:15:12,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 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) [2022-12-05 22:15:12,228 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 22:15:12,228 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 22:15:12,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-05 22:15:12,228 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 22:15:12,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 22:15:12,228 INFO L85 PathProgramCache]: Analyzing trace with hash 242900666, now seen corresponding path program 1 times [2022-12-05 22:15:12,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 22:15:12,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488986948] [2022-12-05 22:15:12,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 22:15:12,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 22:15:12,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 22:15:12,290 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-05 22:15:12,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 22:15:12,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488986948] [2022-12-05 22:15:12,291 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488986948] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-05 22:15:12,291 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-05 22:15:12,291 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-05 22:15:12,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750993190] [2022-12-05 22:15:12,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 22:15:12,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-05 22:15:12,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 22:15:12,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-05 22:15:12,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-05 22:15:12,292 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 19 [2022-12-05 22:15:12,292 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 33 transitions, 194 flow. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 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) [2022-12-05 22:15:12,292 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 22:15:12,292 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 19 [2022-12-05 22:15:12,292 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 22:15:12,350 INFO L130 PetriNetUnfolder]: 105/197 cut-off events. [2022-12-05 22:15:12,350 INFO L131 PetriNetUnfolder]: For 402/402 co-relation queries the response was YES. [2022-12-05 22:15:12,350 INFO L83 FinitePrefix]: Finished finitePrefix Result has 780 conditions, 197 events. 105/197 cut-off events. For 402/402 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 524 event pairs, 56 based on Foata normal form. 8/203 useless extension candidates. Maximal degree in co-relation 696. Up to 182 conditions per place. [2022-12-05 22:15:12,351 INFO L137 encePairwiseOnDemand]: 13/19 looper letters, 32 selfloop transitions, 2 changer transitions 9/43 dead transitions. [2022-12-05 22:15:12,351 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 43 transitions, 314 flow [2022-12-05 22:15:12,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-05 22:15:12,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-05 22:15:12,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 31 transitions. [2022-12-05 22:15:12,352 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.3263157894736842 [2022-12-05 22:15:12,352 INFO L175 Difference]: Start difference. First operand has 45 places, 33 transitions, 194 flow. Second operand 5 states and 31 transitions. [2022-12-05 22:15:12,352 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 43 transitions, 314 flow [2022-12-05 22:15:12,353 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 43 transitions, 290 flow, removed 3 selfloop flow, removed 6 redundant places. [2022-12-05 22:15:12,354 INFO L231 Difference]: Finished difference. Result has 44 places, 34 transitions, 193 flow [2022-12-05 22:15:12,354 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=173, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=193, PETRI_PLACES=44, PETRI_TRANSITIONS=34} [2022-12-05 22:15:12,354 INFO L294 CegarLoopForPetriNet]: 22 programPoint places, 22 predicate places. [2022-12-05 22:15:12,354 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 34 transitions, 193 flow [2022-12-05 22:15:12,355 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 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) [2022-12-05 22:15:12,355 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 22:15:12,355 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 22:15:12,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-05 22:15:12,355 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 22:15:12,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 22:15:12,355 INFO L85 PathProgramCache]: Analyzing trace with hash 1828537249, now seen corresponding path program 1 times [2022-12-05 22:15:12,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 22:15:12,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22422289] [2022-12-05 22:15:12,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 22:15:12,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 22:15:12,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 22:15:12,483 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-05 22:15:12,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 22:15:12,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22422289] [2022-12-05 22:15:12,483 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22422289] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-05 22:15:12,483 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-05 22:15:12,483 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-05 22:15:12,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303660325] [2022-12-05 22:15:12,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 22:15:12,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-05 22:15:12,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 22:15:12,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-05 22:15:12,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-05 22:15:12,484 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 19 [2022-12-05 22:15:12,484 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 34 transitions, 193 flow. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 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) [2022-12-05 22:15:12,484 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 22:15:12,484 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 19 [2022-12-05 22:15:12,484 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 22:15:12,531 INFO L130 PetriNetUnfolder]: 80/147 cut-off events. [2022-12-05 22:15:12,531 INFO L131 PetriNetUnfolder]: For 193/193 co-relation queries the response was YES. [2022-12-05 22:15:12,532 INFO L83 FinitePrefix]: Finished finitePrefix Result has 571 conditions, 147 events. 80/147 cut-off events. For 193/193 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 353 event pairs, 15 based on Foata normal form. 4/150 useless extension candidates. Maximal degree in co-relation 547. Up to 130 conditions per place. [2022-12-05 22:15:12,532 INFO L137 encePairwiseOnDemand]: 16/19 looper letters, 32 selfloop transitions, 3 changer transitions 0/35 dead transitions. [2022-12-05 22:15:12,532 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 35 transitions, 265 flow [2022-12-05 22:15:12,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-05 22:15:12,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-05 22:15:12,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 23 transitions. [2022-12-05 22:15:12,533 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.40350877192982454 [2022-12-05 22:15:12,533 INFO L175 Difference]: Start difference. First operand has 44 places, 34 transitions, 193 flow. Second operand 3 states and 23 transitions. [2022-12-05 22:15:12,533 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 35 transitions, 265 flow [2022-12-05 22:15:12,534 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 35 transitions, 246 flow, removed 6 selfloop flow, removed 4 redundant places. [2022-12-05 22:15:12,535 INFO L231 Difference]: Finished difference. Result has 41 places, 34 transitions, 185 flow [2022-12-05 22:15:12,535 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=185, PETRI_PLACES=41, PETRI_TRANSITIONS=34} [2022-12-05 22:15:12,535 INFO L294 CegarLoopForPetriNet]: 22 programPoint places, 19 predicate places. [2022-12-05 22:15:12,535 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 34 transitions, 185 flow [2022-12-05 22:15:12,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 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) [2022-12-05 22:15:12,535 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 22:15:12,535 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 22:15:12,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-05 22:15:12,536 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 22:15:12,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 22:15:12,536 INFO L85 PathProgramCache]: Analyzing trace with hash 2030261717, now seen corresponding path program 2 times [2022-12-05 22:15:12,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 22:15:12,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071519866] [2022-12-05 22:15:12,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 22:15:12,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 22:15:12,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 22:15:13,698 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 22:15:13,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 22:15:13,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071519866] [2022-12-05 22:15:13,699 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071519866] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 22:15:13,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [23272445] [2022-12-05 22:15:13,699 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-05 22:15:13,699 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 22:15:13,699 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 22:15:13,700 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) [2022-12-05 22:15:13,702 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-05 22:15:13,837 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-05 22:15:13,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 22:15:13,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 65 conjunts are in the unsatisfiable core [2022-12-05 22:15:13,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 22:15:13,988 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-05 22:15:14,049 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 [2022-12-05 22:15:14,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-05 22:15:14,160 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 29 treesize of output 29 [2022-12-05 22:15:14,390 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-05 22:15:14,392 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-12-05 22:15:14,392 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 50 treesize of output 20 [2022-12-05 22:15:14,464 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 22:15:14,464 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 22:15:15,272 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 22:15:15,272 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 118 treesize of output 82 [2022-12-05 22:15:15,307 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 22:15:15,308 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 247 treesize of output 315 [2022-12-05 22:15:15,330 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 22:15:15,330 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 191 treesize of output 199 [2022-12-05 22:15:15,367 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 22:15:15,368 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 133 treesize of output 197 [2022-12-05 22:15:30,127 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 22:15:30,128 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 118 treesize of output 82 [2022-12-05 22:15:30,179 INFO L321 Elim1Store]: treesize reduction 50, result has 50.5 percent of original size [2022-12-05 22:15:30,180 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 493 treesize of output 487 [2022-12-05 22:15:30,233 INFO L321 Elim1Store]: treesize reduction 40, result has 55.1 percent of original size [2022-12-05 22:15:30,233 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 437 treesize of output 443 [2022-12-05 22:15:30,266 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 22:15:30,266 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 377 treesize of output 349 [2022-12-05 22:15:33,170 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 22:15:33,171 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [23272445] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 22:15:33,171 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 22:15:33,171 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 35 [2022-12-05 22:15:33,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785929569] [2022-12-05 22:15:33,171 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 22:15:33,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-12-05 22:15:33,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 22:15:33,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-12-05 22:15:33,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1211, Unknown=2, NotChecked=0, Total=1332 [2022-12-05 22:15:33,172 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 19 [2022-12-05 22:15:33,173 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 34 transitions, 185 flow. Second operand has 37 states, 36 states have (on average 1.4722222222222223) internal successors, (53), 36 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 22:15:33,173 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 22:15:33,173 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 19 [2022-12-05 22:15:33,173 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 22:15:34,577 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse2 (+ c_~i~0 1))) (and (<= c_~i~0 c_~j~0) (or (not (<= 0 c_~q1_back~0)) (< |c_ULTIMATE.start_create_fresh_int_array_~i~1#1| |c_ULTIMATE.start_create_fresh_int_array_~size#1|) (not (< c_~q1_back~0 c_~n1~0)) (<= c_~n2~0 c_~q2_front~0) (let ((.cse5 (+ (* c_~q2_front~0 4) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) (.cse3 (+ (* c_~q1_back~0 4) c_~q1~0.offset)) (.cse1 (+ (* c_~q1_front~0 4) c_~q1~0.offset)) (.cse7 (+ (* c_~q2_back~0 4) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|))) (and (forall ((v_ArrVal_188 (Array Int Int))) (let ((.cse6 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_188))) (or (forall ((~q1~0.base Int) (v_ArrVal_189 (Array Int Int))) (let ((.cse4 (store .cse6 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_189))) (let ((.cse0 (select .cse4 ~q1~0.base))) (or (< (select .cse0 .cse1) .cse2) (not (= c_~j~0 (select .cse0 .cse3))) (< (select (select .cse4 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) .cse5) c_~i~0))))) (not (= c_~i~0 (select (select .cse6 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) .cse7)))))) (forall ((v_ArrVal_188 (Array Int Int))) (let ((.cse10 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_188))) (or (forall ((~q1~0.base Int) (v_ArrVal_189 (Array Int Int))) (let ((.cse8 (store .cse10 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_189))) (let ((.cse9 (select .cse8 ~q1~0.base))) (or (< (select (select .cse8 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) .cse5) .cse2) (not (= c_~j~0 (select .cse9 .cse3))) (< (select .cse9 .cse1) c_~i~0))))) (not (= c_~i~0 (select (select .cse10 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) .cse7)))))))) (< c_~q2_front~0 0)) (< c_~j~0 .cse2))) is different from false [2022-12-05 22:15:59,560 INFO L130 PetriNetUnfolder]: 590/1102 cut-off events. [2022-12-05 22:15:59,560 INFO L131 PetriNetUnfolder]: For 1106/1106 co-relation queries the response was YES. [2022-12-05 22:15:59,562 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3903 conditions, 1102 events. 590/1102 cut-off events. For 1106/1106 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 5580 event pairs, 7 based on Foata normal form. 17/1114 useless extension candidates. Maximal degree in co-relation 3523. Up to 253 conditions per place. [2022-12-05 22:15:59,566 INFO L137 encePairwiseOnDemand]: 5/19 looper letters, 191 selfloop transitions, 210 changer transitions 19/420 dead transitions. [2022-12-05 22:15:59,566 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 420 transitions, 2804 flow [2022-12-05 22:15:59,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-12-05 22:15:59,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2022-12-05 22:15:59,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 385 transitions. [2022-12-05 22:15:59,568 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.2471116816431322 [2022-12-05 22:15:59,568 INFO L175 Difference]: Start difference. First operand has 41 places, 34 transitions, 185 flow. Second operand 82 states and 385 transitions. [2022-12-05 22:15:59,568 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 420 transitions, 2804 flow [2022-12-05 22:15:59,572 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 420 transitions, 2682 flow, removed 14 selfloop flow, removed 3 redundant places. [2022-12-05 22:15:59,576 INFO L231 Difference]: Finished difference. Result has 144 places, 240 transitions, 1991 flow [2022-12-05 22:15:59,576 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=6, PETRI_DIFFERENCE_SUBTRAHEND_STATES=82, PETRI_FLOW=1991, PETRI_PLACES=144, PETRI_TRANSITIONS=240} [2022-12-05 22:15:59,577 INFO L294 CegarLoopForPetriNet]: 22 programPoint places, 122 predicate places. [2022-12-05 22:15:59,577 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 240 transitions, 1991 flow [2022-12-05 22:15:59,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 1.4722222222222223) internal successors, (53), 36 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 22:15:59,577 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 22:15:59,577 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 22:15:59,586 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-05 22:15:59,782 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 [2022-12-05 22:15:59,782 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 22:15:59,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 22:15:59,783 INFO L85 PathProgramCache]: Analyzing trace with hash 1330088111, now seen corresponding path program 3 times [2022-12-05 22:15:59,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 22:15:59,783 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396694234] [2022-12-05 22:15:59,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 22:15:59,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 22:15:59,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 22:16:00,856 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 22:16:00,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 22:16:00,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396694234] [2022-12-05 22:16:00,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396694234] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 22:16:00,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937313105] [2022-12-05 22:16:00,857 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-05 22:16:00,857 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 22:16:00,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 22:16:00,858 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) [2022-12-05 22:16:00,860 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-05 22:16:01,008 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-05 22:16:01,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 22:16:01,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 59 conjunts are in the unsatisfiable core [2022-12-05 22:16:01,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 22:16:01,134 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 [2022-12-05 22:16:01,178 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 [2022-12-05 22:16:01,221 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 [2022-12-05 22:16:01,440 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 22:16:01,440 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 60 treesize of output 40 [2022-12-05 22:16:01,504 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 22:16:01,504 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 22:16:02,222 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 22:16:02,222 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 121 treesize of output 85 [2022-12-05 22:16:02,277 INFO L321 Elim1Store]: treesize reduction 5, result has 95.0 percent of original size [2022-12-05 22:16:02,278 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 287 treesize of output 350 [2022-12-05 22:16:02,290 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-05 22:16:02,309 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 22:16:02,309 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 255 treesize of output 283 [2022-12-05 22:16:02,327 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-05 22:16:02,345 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 22:16:02,345 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 161 treesize of output 213 [2022-12-05 22:16:19,080 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 22:16:19,081 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 121 treesize of output 85 [2022-12-05 22:16:19,126 INFO L321 Elim1Store]: treesize reduction 50, result has 50.5 percent of original size [2022-12-05 22:16:19,127 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 447 treesize of output 449 [2022-12-05 22:16:19,173 INFO L321 Elim1Store]: treesize reduction 40, result has 55.1 percent of original size [2022-12-05 22:16:19,174 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 304 treesize of output 316 [2022-12-05 22:16:19,225 INFO L321 Elim1Store]: treesize reduction 40, result has 55.1 percent of original size [2022-12-05 22:16:19,226 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 363 treesize of output 339 [2022-12-05 22:16:22,678 INFO L208 tifierPushTermWalker]: Run 10 iterations without descend maybe there is a nontermination bug. [2022-12-05 22:16:22,970 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 22:16:22,970 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [937313105] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 22:16:22,970 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 22:16:22,970 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 35 [2022-12-05 22:16:22,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056963507] [2022-12-05 22:16:22,971 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 22:16:22,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-12-05 22:16:22,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 22:16:22,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-12-05 22:16:22,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=1180, Unknown=2, NotChecked=0, Total=1332 [2022-12-05 22:16:22,985 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 19 [2022-12-05 22:16:22,985 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 240 transitions, 1991 flow. Second operand has 37 states, 36 states have (on average 1.4722222222222223) internal successors, (53), 36 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 22:16:22,985 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 22:16:22,985 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 19 [2022-12-05 22:16:22,985 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 22:16:23,509 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (<= c_~n1~0 c_~q1_front~0)) (.cse16 (< c_~q1_front~0 0)) (.cse17 (< |c_ULTIMATE.start_create_fresh_int_array_~i~1#1| |c_ULTIMATE.start_create_fresh_int_array_~size#1|)) (.cse12 (* c_~q2_back~0 4)) (.cse13 (* c_~q2_front~0 4)) (.cse14 (* c_~q1_back~0 4)) (.cse15 (* c_~q1_front~0 4)) (.cse3 (+ c_~i~0 1)) (.cse18 (not (<= 0 c_~q2_back~0)))) (and (= c_~j~0 c_~i~0) (or .cse0 (let ((.cse6 (+ .cse15 c_~q1~0.offset)) (.cse5 (+ .cse14 c_~q1~0.offset)) (.cse2 (+ .cse13 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) (.cse8 (+ .cse12 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|))) (and (forall ((v_ArrVal_230 (Array Int Int)) (v_ArrVal_231 (Array Int Int))) (let ((.cse7 (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_230) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_231))) (let ((.cse1 (select .cse7 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) (or (< (select .cse1 .cse2) .cse3) (forall ((~q1~0.base Int)) (let ((.cse4 (select .cse7 ~q1~0.base))) (or (not (= c_~j~0 (select .cse4 .cse5))) (< (select .cse4 .cse6) c_~i~0)))) (not (= (select .cse1 .cse8) c_~i~0)))))) (forall ((v_ArrVal_230 (Array Int Int)) (v_ArrVal_231 (Array Int Int))) (let ((.cse10 (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_230) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_231))) (let ((.cse11 (select .cse10 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) (or (forall ((~q1~0.base Int)) (let ((.cse9 (select .cse10 ~q1~0.base))) (or (< (select .cse9 .cse6) .cse3) (not (= c_~j~0 (select .cse9 .cse5)))))) (< (select .cse11 .cse2) c_~i~0) (not (= (select .cse11 .cse8) c_~i~0)))))))) .cse16 .cse17 (not (< c_~q2_back~0 c_~n2~0)) .cse18) (or .cse0 .cse16 .cse17 (< 0 c_~q2_back~0) (and (or (= .cse12 .cse13) (< c_~j~0 c_~i~0)) (= .cse14 .cse15) (< c_~j~0 .cse3)) .cse18))) is different from false [2022-12-05 22:16:32,823 INFO L130 PetriNetUnfolder]: 863/1669 cut-off events. [2022-12-05 22:16:32,824 INFO L131 PetriNetUnfolder]: For 13777/13777 co-relation queries the response was YES. [2022-12-05 22:16:32,828 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9213 conditions, 1669 events. 863/1669 cut-off events. For 13777/13777 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 9692 event pairs, 44 based on Foata normal form. 11/1674 useless extension candidates. Maximal degree in co-relation 9000. Up to 602 conditions per place. [2022-12-05 22:16:32,836 INFO L137 encePairwiseOnDemand]: 5/19 looper letters, 180 selfloop transitions, 310 changer transitions 26/516 dead transitions. [2022-12-05 22:16:32,836 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 516 transitions, 5223 flow [2022-12-05 22:16:32,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-12-05 22:16:32,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2022-12-05 22:16:32,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 289 transitions. [2022-12-05 22:16:32,840 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.2270227808326787 [2022-12-05 22:16:32,840 INFO L175 Difference]: Start difference. First operand has 144 places, 240 transitions, 1991 flow. Second operand 67 states and 289 transitions. [2022-12-05 22:16:32,841 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 516 transitions, 5223 flow [2022-12-05 22:16:32,882 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 516 transitions, 4585 flow, removed 305 selfloop flow, removed 8 redundant places. [2022-12-05 22:16:32,889 INFO L231 Difference]: Finished difference. Result has 221 places, 378 transitions, 3677 flow [2022-12-05 22:16:32,889 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=1467, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=162, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=67, PETRI_FLOW=3677, PETRI_PLACES=221, PETRI_TRANSITIONS=378} [2022-12-05 22:16:32,889 INFO L294 CegarLoopForPetriNet]: 22 programPoint places, 199 predicate places. [2022-12-05 22:16:32,890 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 378 transitions, 3677 flow [2022-12-05 22:16:32,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 1.4722222222222223) internal successors, (53), 36 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 22:16:32,890 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 22:16:32,890 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 22:16:32,895 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-12-05 22:16:33,094 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 [2022-12-05 22:16:33,095 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 22:16:33,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 22:16:33,095 INFO L85 PathProgramCache]: Analyzing trace with hash 1794181645, now seen corresponding path program 4 times [2022-12-05 22:16:33,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 22:16:33,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865638436] [2022-12-05 22:16:33,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 22:16:33,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 22:16:33,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 22:16:34,239 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 22:16:34,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 22:16:34,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865638436] [2022-12-05 22:16:34,240 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865638436] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 22:16:34,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905585547] [2022-12-05 22:16:34,240 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-05 22:16:34,240 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 22:16:34,240 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 22:16:34,257 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) [2022-12-05 22:16:34,258 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-05 22:16:34,339 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-05 22:16:34,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 22:16:34,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 62 conjunts are in the unsatisfiable core [2022-12-05 22:16:34,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 22:16:34,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-05 22:16:34,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-05 22:16:34,359 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-05 22:16:34,359 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 [2022-12-05 22:16:34,431 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 [2022-12-05 22:16:34,486 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-05 22:16:34,487 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 [2022-12-05 22:16:34,532 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 [2022-12-05 22:16:34,585 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 [2022-12-05 22:16:34,649 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 [2022-12-05 22:16:34,844 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 22:16:34,845 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 56 treesize of output 38 [2022-12-05 22:16:34,915 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 22:16:34,915 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 22:16:35,891 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 22:16:35,892 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 156 treesize of output 108 [2022-12-05 22:16:35,978 INFO L321 Elim1Store]: treesize reduction 4, result has 95.7 percent of original size [2022-12-05 22:16:35,979 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 213719 treesize of output 199247 [2022-12-05 22:16:36,590 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 22:16:36,591 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 199159 treesize of output 188839 [2022-12-05 22:16:37,172 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 22:16:37,173 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 188759 treesize of output 168039 [2022-12-05 22:16:37,758 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 22:16:37,759 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 167959 treesize of output 126439 Received shutdown request... [2022-12-05 22:29:26,460 WARN L249 SmtUtils]: Removed 1 from assertion stack [2022-12-05 22:29:26,463 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2022-12-05 22:29:26,472 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-12-05 22:29:26,475 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 [2022-12-05 22:29:26,481 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-12-05 22:29:26,668 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 [2022-12-05 22:29:26,669 WARN L619 AbstractCegarLoop]: Verification canceled: while CegarLoopForPetriNet was analyzing trace of length 20 with TraceHistMax 1,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∧-2-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ∨-2-1 context. [2022-12-05 22:29:26,670 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2022-12-05 22:29:26,670 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2022-12-05 22:29:26,671 INFO L458 BasicCegarLoop]: Path program histogram: [4, 2, 2, 1, 1, 1] [2022-12-05 22:29:26,674 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-12-05 22:29:26,674 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-12-05 22:29:26,689 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.12 10:29:26 BasicIcfg [2022-12-05 22:29:26,689 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-12-05 22:29:26,689 INFO L158 Benchmark]: Toolchain (without parser) took 862918.74ms. Allocated memory was 168.8MB in the beginning and 1.1GB in the end (delta: 916.5MB). Free memory was 127.2MB in the beginning and 1.0GB in the end (delta: -915.7MB). Peak memory consumption was 660.2MB. Max. memory is 8.0GB. [2022-12-05 22:29:26,689 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 168.8MB. Free memory is still 144.8MB. There was no memory consumed. Max. memory is 8.0GB. [2022-12-05 22:29:26,690 INFO L158 Benchmark]: CACSL2BoogieTranslator took 250.13ms. Allocated memory is still 168.8MB. Free memory was 126.7MB in the beginning and 114.1MB in the end (delta: 12.6MB). Peak memory consumption was 13.6MB. Max. memory is 8.0GB. [2022-12-05 22:29:26,690 INFO L158 Benchmark]: Boogie Procedure Inliner took 32.53ms. Allocated memory is still 168.8MB. Free memory was 113.6MB in the beginning and 111.5MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-12-05 22:29:26,690 INFO L158 Benchmark]: Boogie Preprocessor took 37.35ms. Allocated memory is still 168.8MB. Free memory was 111.5MB in the beginning and 109.9MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-12-05 22:29:26,690 INFO L158 Benchmark]: RCFGBuilder took 586.50ms. Allocated memory is still 168.8MB. Free memory was 109.9MB in the beginning and 82.1MB in the end (delta: 27.8MB). Peak memory consumption was 28.3MB. Max. memory is 8.0GB. [2022-12-05 22:29:26,690 INFO L158 Benchmark]: TraceAbstraction took 862005.38ms. Allocated memory was 168.8MB in the beginning and 1.1GB in the end (delta: 916.5MB). Free memory was 81.6MB in the beginning and 1.0GB in the end (delta: -961.3MB). Peak memory consumption was 615.1MB. Max. memory is 8.0GB. [2022-12-05 22:29:26,691 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13ms. Allocated memory is still 168.8MB. Free memory is still 144.8MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 250.13ms. Allocated memory is still 168.8MB. Free memory was 126.7MB in the beginning and 114.1MB in the end (delta: 12.6MB). Peak memory consumption was 13.6MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 32.53ms. Allocated memory is still 168.8MB. Free memory was 113.6MB in the beginning and 111.5MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 37.35ms. Allocated memory is still 168.8MB. Free memory was 111.5MB in the beginning and 109.9MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 586.50ms. Allocated memory is still 168.8MB. Free memory was 109.9MB in the beginning and 82.1MB in the end (delta: 27.8MB). Peak memory consumption was 28.3MB. Max. memory is 8.0GB. * TraceAbstraction took 862005.38ms. Allocated memory was 168.8MB in the beginning and 1.1GB in the end (delta: 916.5MB). Free memory was 81.6MB in the beginning and 1.0GB in the end (delta: -961.3MB). Peak memory consumption was 615.1MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 5.6s, 147 PlacesBefore, 22 PlacesAfterwards, 153 TransitionsBefore, 19 TransitionsAfterwards, 500 CoEnabledTransitionPairs, 3 FixpointIterations, 0 TrivialSequentialCompositions, 0 ConcurrentSequentialCompositions, 106 TrivialYvCompositions, 19 ConcurrentYvCompositions, 9 ChoiceCompositions, 134 TotalNumberOfCompositions, Independence Relation Statistics: ConditionTransformingIndependenceRelation.Independence Queries: [ total: 315, independent: 301, independent conditional: 301, independent unconditional: 0, dependent: 14, dependent conditional: 14, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ConditionTransformingIndependenceRelation.Statistics on underlying relation: DisjunctiveConditionalIndependenceRelation.Independence Queries: [ total: 315, independent: 301, independent conditional: 0, independent unconditional: 301, dependent: 14, dependent conditional: 0, dependent unconditional: 14, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , DisjunctiveConditionalIndependenceRelation.Statistics on underlying relation: SemanticConditionEliminator.Independence Queries: [ total: 315, independent: 301, independent conditional: 0, independent unconditional: 301, dependent: 14, dependent conditional: 0, dependent unconditional: 14, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticConditionEliminator.Statistics on underlying relation: CachedIndependenceRelation.Independence Queries: [ total: 315, independent: 301, independent conditional: 0, independent unconditional: 301, dependent: 14, dependent conditional: 0, dependent unconditional: 14, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 294, independent: 286, independent conditional: 0, independent unconditional: 286, dependent: 8, dependent conditional: 0, dependent unconditional: 8, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 294, independent: 283, independent conditional: 0, independent unconditional: 283, dependent: 11, dependent conditional: 0, dependent unconditional: 11, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 11, independent: 3, independent conditional: 0, independent unconditional: 3, dependent: 8, dependent conditional: 0, dependent unconditional: 8, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 47, independent: 16, independent conditional: 0, independent unconditional: 16, dependent: 32, dependent conditional: 0, dependent unconditional: 32, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 315, independent: 15, independent conditional: 0, independent unconditional: 15, dependent: 6, dependent conditional: 0, dependent unconditional: 6, unknown: 294, unknown conditional: 0, unknown unconditional: 294] , Statistics on independence cache: Total cache size (in pairs): 477, Positive cache size: 469, Positive conditional cache size: 0, Positive unconditional cache size: 469, Negative cache size: 8, Negative conditional cache size: 0, Negative unconditional cache size: 8, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0, Eliminated conditions: 0, Maximal queried relation: -1 - TimeoutResultAtElement [Line: 102]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while CegarLoopForPetriNet was analyzing trace of length 20 with TraceHistMax 1,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∧-2-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ∨-2-1 context. - TimeoutResultAtElement [Line: 96]: 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 20 with TraceHistMax 1,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∧-2-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ∨-2-1 context. - TimeoutResultAtElement [Line: 97]: 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 20 with TraceHistMax 1,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∧-2-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ∨-2-1 context. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 171 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 861.9s, OverallIterations: 11, TraceHistogramMax: 1, PathProgramHistogramMax: 4, EmptinessCheckTime: 0.0s, AutomataDifference: 36.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 5.8s, HoareTripleCheckerStatistics: 57 mSolverCounterUnknown, 1239 SdHoareTripleChecker+Valid, 4.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1239 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 3.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 5 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 398 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 4152 IncrementalHoareTripleChecker+Invalid, 4612 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 398 mSolverCounterUnsat, 0 mSDtfsCounter, 4152 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 287 GetRequests, 61 SyntacticMatches, 2 SemanticMatches, 224 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 5151 ImplicationChecksByTransitivity, 34.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=3677occurred in iteration=10, InterpolantAutomatonStates: 186, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 44.1s InterpolantComputationTime, 219 NumberOfCodeBlocks, 219 NumberOfCodeBlocksAsserted, 16 NumberOfCheckSat, 257 ConstructedInterpolants, 18 QuantifiedInterpolants, 5852 SizeOfPredicates, 71 NumberOfNonLiveVariables, 696 ConjunctsInSsa, 128 ConjunctsInUnsatCore, 16 InterpolantComputations, 7 PerfectInterpolantSequences, 15/42 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