/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/unroll-cond-4.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.repeated-lipton-a802222-m [2022-12-12 16:41:35,740 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-12 16:41:35,742 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-12 16:41:35,771 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-12 16:41:35,771 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-12 16:41:35,773 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-12 16:41:35,775 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-12 16:41:35,779 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-12 16:41:35,783 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-12 16:41:35,787 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-12 16:41:35,787 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-12 16:41:35,789 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-12 16:41:35,789 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-12 16:41:35,791 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-12 16:41:35,792 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-12 16:41:35,792 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-12 16:41:35,793 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-12 16:41:35,793 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-12 16:41:35,795 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-12 16:41:35,801 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-12 16:41:35,802 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-12 16:41:35,803 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-12 16:41:35,804 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-12 16:41:35,804 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-12 16:41:35,809 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-12 16:41:35,810 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-12 16:41:35,810 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-12 16:41:35,812 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-12 16:41:35,812 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-12 16:41:35,812 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-12 16:41:35,812 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-12 16:41:35,814 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-12 16:41:35,815 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-12 16:41:35,816 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-12 16:41:35,816 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-12 16:41:35,816 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-12 16:41:35,817 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-12 16:41:35,817 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-12 16:41:35,817 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-12 16:41:35,817 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-12 16:41:35,818 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-12 16:41:35,819 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe.epf [2022-12-12 16:41:35,848 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-12 16:41:35,848 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-12 16:41:35,849 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-12 16:41:35,850 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-12 16:41:35,850 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-12 16:41:35,851 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-12 16:41:35,851 INFO L138 SettingsManager]: * Use SBE=true [2022-12-12 16:41:35,851 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-12 16:41:35,851 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-12 16:41:35,851 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-12 16:41:35,852 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-12 16:41:35,852 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-12 16:41:35,870 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-12 16:41:35,871 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-12 16:41:35,871 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-12 16:41:35,871 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-12 16:41:35,871 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-12 16:41:35,871 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-12 16:41:35,871 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-12 16:41:35,871 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-12 16:41:35,871 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-12 16:41:35,872 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-12-12 16:41:35,872 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-12 16:41:35,872 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-12 16:41:35,872 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-12 16:41:35,872 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-12 16:41:35,872 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-12 16:41:35,872 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-12 16:41:35,872 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-12 16:41:35,872 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-12 16:41:35,872 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-12-12 16:41:36,110 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-12 16:41:36,138 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-12 16:41:36,140 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-12 16:41:36,141 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-12 16:41:36,142 INFO L275 PluginConnector]: CDTParser initialized [2022-12-12 16:41:36,143 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/unroll-cond-4.wvr.c [2022-12-12 16:41:37,089 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-12 16:41:37,277 INFO L351 CDTParser]: Found 1 translation units. [2022-12-12 16:41:37,278 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/unroll-cond-4.wvr.c [2022-12-12 16:41:37,287 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b8e24a03c/e91b185fc02f4c089401eba43df6fd9b/FLAG5c7706b59 [2022-12-12 16:41:37,298 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b8e24a03c/e91b185fc02f4c089401eba43df6fd9b [2022-12-12 16:41:37,299 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-12 16:41:37,300 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-12-12 16:41:37,301 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-12 16:41:37,301 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-12 16:41:37,303 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-12 16:41:37,304 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.12 04:41:37" (1/1) ... [2022-12-12 16:41:37,304 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@527effc2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 04:41:37, skipping insertion in model container [2022-12-12 16:41:37,305 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.12 04:41:37" (1/1) ... [2022-12-12 16:41:37,309 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-12 16:41:37,327 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-12 16:41:37,489 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/unroll-cond-4.wvr.c[2808,2821] [2022-12-12 16:41:37,495 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-12 16:41:37,504 INFO L203 MainTranslator]: Completed pre-run [2022-12-12 16:41:37,540 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/unroll-cond-4.wvr.c[2808,2821] [2022-12-12 16:41:37,542 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-12 16:41:37,560 INFO L208 MainTranslator]: Completed translation [2022-12-12 16:41:37,560 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 04:41:37 WrapperNode [2022-12-12 16:41:37,562 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-12 16:41:37,563 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-12 16:41:37,563 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-12 16:41:37,563 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-12 16:41:37,567 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 04:41:37" (1/1) ... [2022-12-12 16:41:37,577 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 04:41:37" (1/1) ... [2022-12-12 16:41:37,594 INFO L138 Inliner]: procedures = 24, calls = 41, calls flagged for inlining = 15, calls inlined = 15, statements flattened = 183 [2022-12-12 16:41:37,595 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-12 16:41:37,598 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-12 16:41:37,598 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-12 16:41:37,598 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-12 16:41:37,604 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 04:41:37" (1/1) ... [2022-12-12 16:41:37,604 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 04:41:37" (1/1) ... [2022-12-12 16:41:37,616 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 04:41:37" (1/1) ... [2022-12-12 16:41:37,616 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 04:41:37" (1/1) ... [2022-12-12 16:41:37,621 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 04:41:37" (1/1) ... [2022-12-12 16:41:37,624 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 04:41:37" (1/1) ... [2022-12-12 16:41:37,625 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 04:41:37" (1/1) ... [2022-12-12 16:41:37,626 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 04:41:37" (1/1) ... [2022-12-12 16:41:37,627 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-12 16:41:37,628 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-12 16:41:37,628 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-12 16:41:37,628 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-12 16:41:37,629 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 04:41:37" (1/1) ... [2022-12-12 16:41:37,632 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-12 16:41:37,653 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 16:41:37,663 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-12 16:41:37,699 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-12 16:41:37,708 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-12 16:41:37,708 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-12-12 16:41:37,708 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-12-12 16:41:37,708 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-12-12 16:41:37,708 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-12-12 16:41:37,708 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-12 16:41:37,708 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-12 16:41:37,708 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-12 16:41:37,709 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-12 16:41:37,709 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-12 16:41:37,709 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-12 16:41:37,709 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-12 16:41:37,709 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-12 16:41:37,710 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2022-12-12 16:41:37,802 INFO L236 CfgBuilder]: Building ICFG [2022-12-12 16:41:37,805 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-12 16:41:38,081 INFO L277 CfgBuilder]: Performing block encoding [2022-12-12 16:41:38,088 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-12 16:41:38,088 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2022-12-12 16:41:38,090 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.12 04:41:38 BoogieIcfgContainer [2022-12-12 16:41:38,090 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-12 16:41:38,092 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-12 16:41:38,092 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-12 16:41:38,094 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-12 16:41:38,094 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.12 04:41:37" (1/3) ... [2022-12-12 16:41:38,095 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6783942 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.12 04:41:38, skipping insertion in model container [2022-12-12 16:41:38,095 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 04:41:37" (2/3) ... [2022-12-12 16:41:38,095 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6783942 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.12 04:41:38, skipping insertion in model container [2022-12-12 16:41:38,101 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.12 04:41:38" (3/3) ... [2022-12-12 16:41:38,102 INFO L112 eAbstractionObserver]: Analyzing ICFG unroll-cond-4.wvr.c [2022-12-12 16:41:38,115 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-12 16:41:38,115 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-12 16:41:38,115 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-12 16:41:38,185 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-12-12 16:41:38,217 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 205 places, 219 transitions, 454 flow [2022-12-12 16:41:38,305 INFO L130 PetriNetUnfolder]: 21/217 cut-off events. [2022-12-12 16:41:38,305 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-12 16:41:38,309 INFO L83 FinitePrefix]: Finished finitePrefix Result has 226 conditions, 217 events. 21/217 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 381 event pairs, 0 based on Foata normal form. 0/195 useless extension candidates. Maximal degree in co-relation 133. Up to 2 conditions per place. [2022-12-12 16:41:38,309 INFO L82 GeneralOperation]: Start removeDead. Operand has 205 places, 219 transitions, 454 flow [2022-12-12 16:41:38,316 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 195 places, 209 transitions, 430 flow [2022-12-12 16:41:38,317 INFO L203 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-12 16:41:38,329 INFO L174 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 195 places, 209 transitions, 430 flow [2022-12-12 16:41:38,337 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 195 places, 209 transitions, 430 flow [2022-12-12 16:41:38,381 INFO L130 PetriNetUnfolder]: 21/209 cut-off events. [2022-12-12 16:41:38,381 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-12 16:41:38,382 INFO L83 FinitePrefix]: Finished finitePrefix Result has 218 conditions, 209 events. 21/209 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 362 event pairs, 0 based on Foata normal form. 0/188 useless extension candidates. Maximal degree in co-relation 133. Up to 2 conditions per place. [2022-12-12 16:41:38,389 INFO L222 LiptonReduction]: Starting Lipton reduction on Petri net that has 195 places, 209 transitions, 430 flow [2022-12-12 16:41:38,389 INFO L226 LiptonReduction]: Number of co-enabled transitions 5492 [2022-12-12 16:41:44,764 INFO L241 LiptonReduction]: Total number of compositions: 189 [2022-12-12 16:41:44,774 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-12 16:41:44,777 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;@a15fa92, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, Conditionality=CONDITIONAL_DISJUNCTIVE, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-12 16:41:44,777 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-12-12 16:41:44,784 INFO L130 PetriNetUnfolder]: 3/16 cut-off events. [2022-12-12 16:41:44,784 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-12 16:41:44,784 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 16:41:44,785 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 16:41:44,785 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 16:41:44,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 16:41:44,788 INFO L85 PathProgramCache]: Analyzing trace with hash 31865598, now seen corresponding path program 1 times [2022-12-12 16:41:44,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 16:41:44,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870252677] [2022-12-12 16:41:44,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 16:41:44,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 16:41:44,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 16:41:45,109 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 16:41:45,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 16:41:45,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870252677] [2022-12-12 16:41:45,110 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870252677] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 16:41:45,110 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-12 16:41:45,110 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-12 16:41:45,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066990864] [2022-12-12 16:41:45,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 16:41:45,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-12 16:41:45,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 16:41:45,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-12 16:41:45,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-12 16:41:45,134 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 17 [2022-12-12 16:41:45,135 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 17 transitions, 46 flow. Second operand has 3 states, 3 states have (on average 6.0) 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) [2022-12-12 16:41:45,135 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 16:41:45,135 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 17 [2022-12-12 16:41:45,136 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 16:41:45,198 INFO L130 PetriNetUnfolder]: 49/84 cut-off events. [2022-12-12 16:41:45,199 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-12-12 16:41:45,199 INFO L83 FinitePrefix]: Finished finitePrefix Result has 181 conditions, 84 events. 49/84 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 192 event pairs, 19 based on Foata normal form. 0/52 useless extension candidates. Maximal degree in co-relation 129. Up to 81 conditions per place. [2022-12-12 16:41:45,200 INFO L137 encePairwiseOnDemand]: 14/17 looper letters, 14 selfloop transitions, 2 changer transitions 0/18 dead transitions. [2022-12-12 16:41:45,200 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 18 transitions, 80 flow [2022-12-12 16:41:45,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-12 16:41:45,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-12 16:41:45,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 23 transitions. [2022-12-12 16:41:45,215 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.45098039215686275 [2022-12-12 16:41:45,216 INFO L175 Difference]: Start difference. First operand has 21 places, 17 transitions, 46 flow. Second operand 3 states and 23 transitions. [2022-12-12 16:41:45,217 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 18 transitions, 80 flow [2022-12-12 16:41:45,218 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 18 transitions, 72 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-12-12 16:41:45,219 INFO L231 Difference]: Finished difference. Result has 20 places, 18 transitions, 50 flow [2022-12-12 16:41:45,221 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=17, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=50, PETRI_PLACES=20, PETRI_TRANSITIONS=18} [2022-12-12 16:41:45,223 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, -1 predicate places. [2022-12-12 16:41:45,223 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 18 transitions, 50 flow [2022-12-12 16:41:45,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) 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) [2022-12-12 16:41:45,224 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 16:41:45,224 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 16:41:45,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-12 16:41:45,225 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 16:41:45,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 16:41:45,232 INFO L85 PathProgramCache]: Analyzing trace with hash -845963527, now seen corresponding path program 1 times [2022-12-12 16:41:45,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 16:41:45,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934687926] [2022-12-12 16:41:45,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 16:41:45,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 16:41:45,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 16:41:45,485 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 16:41:45,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 16:41:45,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934687926] [2022-12-12 16:41:45,486 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934687926] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 16:41:45,486 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-12 16:41:45,486 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-12 16:41:45,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14432124] [2022-12-12 16:41:45,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 16:41:45,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-12 16:41:45,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 16:41:45,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-12 16:41:45,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-12 16:41:45,488 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 17 [2022-12-12 16:41:45,488 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 18 transitions, 50 flow. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 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) [2022-12-12 16:41:45,488 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 16:41:45,488 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 17 [2022-12-12 16:41:45,488 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 16:41:45,646 INFO L130 PetriNetUnfolder]: 72/135 cut-off events. [2022-12-12 16:41:45,648 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-12 16:41:45,652 INFO L83 FinitePrefix]: Finished finitePrefix Result has 285 conditions, 135 events. 72/135 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 367 event pairs, 24 based on Foata normal form. 0/104 useless extension candidates. Maximal degree in co-relation 274. Up to 77 conditions per place. [2022-12-12 16:41:45,653 INFO L137 encePairwiseOnDemand]: 11/17 looper letters, 35 selfloop transitions, 5 changer transitions 0/40 dead transitions. [2022-12-12 16:41:45,653 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 40 transitions, 179 flow [2022-12-12 16:41:45,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-12 16:41:45,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-12 16:41:45,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 40 transitions. [2022-12-12 16:41:45,655 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.47058823529411764 [2022-12-12 16:41:45,655 INFO L175 Difference]: Start difference. First operand has 20 places, 18 transitions, 50 flow. Second operand 5 states and 40 transitions. [2022-12-12 16:41:45,655 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 40 transitions, 179 flow [2022-12-12 16:41:45,657 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 40 transitions, 175 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-12-12 16:41:45,658 INFO L231 Difference]: Finished difference. Result has 26 places, 22 transitions, 82 flow [2022-12-12 16:41:45,658 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=17, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=82, PETRI_PLACES=26, PETRI_TRANSITIONS=22} [2022-12-12 16:41:45,658 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 5 predicate places. [2022-12-12 16:41:45,659 INFO L495 AbstractCegarLoop]: Abstraction has has 26 places, 22 transitions, 82 flow [2022-12-12 16:41:45,659 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 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) [2022-12-12 16:41:45,659 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 16:41:45,659 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 16:41:45,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-12 16:41:45,659 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 16:41:45,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 16:41:45,662 INFO L85 PathProgramCache]: Analyzing trace with hash -312235959, now seen corresponding path program 2 times [2022-12-12 16:41:45,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 16:41:45,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655441897] [2022-12-12 16:41:45,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 16:41:45,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 16:41:45,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 16:41:46,063 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 16:41:46,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 16:41:46,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655441897] [2022-12-12 16:41:46,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655441897] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 16:41:46,067 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-12 16:41:46,067 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-12 16:41:46,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240756492] [2022-12-12 16:41:46,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 16:41:46,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-12 16:41:46,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 16:41:46,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-12 16:41:46,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-12 16:41:46,068 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 17 [2022-12-12 16:41:46,068 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 22 transitions, 82 flow. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 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) [2022-12-12 16:41:46,069 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 16:41:46,069 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 17 [2022-12-12 16:41:46,069 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 16:41:46,190 INFO L130 PetriNetUnfolder]: 111/208 cut-off events. [2022-12-12 16:41:46,190 INFO L131 PetriNetUnfolder]: For 115/115 co-relation queries the response was YES. [2022-12-12 16:41:46,193 INFO L83 FinitePrefix]: Finished finitePrefix Result has 602 conditions, 208 events. 111/208 cut-off events. For 115/115 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 664 event pairs, 42 based on Foata normal form. 2/169 useless extension candidates. Maximal degree in co-relation 584. Up to 133 conditions per place. [2022-12-12 16:41:46,194 INFO L137 encePairwiseOnDemand]: 11/17 looper letters, 37 selfloop transitions, 7 changer transitions 0/44 dead transitions. [2022-12-12 16:41:46,194 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 44 transitions, 252 flow [2022-12-12 16:41:46,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-12 16:41:46,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-12 16:41:46,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 36 transitions. [2022-12-12 16:41:46,197 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.4235294117647059 [2022-12-12 16:41:46,197 INFO L175 Difference]: Start difference. First operand has 26 places, 22 transitions, 82 flow. Second operand 5 states and 36 transitions. [2022-12-12 16:41:46,197 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 44 transitions, 252 flow [2022-12-12 16:41:46,200 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 44 transitions, 235 flow, removed 5 selfloop flow, removed 1 redundant places. [2022-12-12 16:41:46,201 INFO L231 Difference]: Finished difference. Result has 32 places, 26 transitions, 124 flow [2022-12-12 16:41:46,201 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=17, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=124, PETRI_PLACES=32, PETRI_TRANSITIONS=26} [2022-12-12 16:41:46,202 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 11 predicate places. [2022-12-12 16:41:46,202 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 26 transitions, 124 flow [2022-12-12 16:41:46,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 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) [2022-12-12 16:41:46,202 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 16:41:46,202 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 16:41:46,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-12 16:41:46,203 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 16:41:46,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 16:41:46,204 INFO L85 PathProgramCache]: Analyzing trace with hash -1263465533, now seen corresponding path program 3 times [2022-12-12 16:41:46,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 16:41:46,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984685924] [2022-12-12 16:41:46,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 16:41:46,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 16:41:46,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 16:41:46,358 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 16:41:46,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 16:41:46,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984685924] [2022-12-12 16:41:46,359 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984685924] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 16:41:46,359 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-12 16:41:46,359 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-12 16:41:46,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103813337] [2022-12-12 16:41:46,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 16:41:46,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-12 16:41:46,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 16:41:46,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-12 16:41:46,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-12 16:41:46,361 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 17 [2022-12-12 16:41:46,361 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 26 transitions, 124 flow. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 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) [2022-12-12 16:41:46,361 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 16:41:46,361 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 17 [2022-12-12 16:41:46,361 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 16:41:46,511 INFO L130 PetriNetUnfolder]: 121/224 cut-off events. [2022-12-12 16:41:46,511 INFO L131 PetriNetUnfolder]: For 326/326 co-relation queries the response was YES. [2022-12-12 16:41:46,511 INFO L83 FinitePrefix]: Finished finitePrefix Result has 785 conditions, 224 events. 121/224 cut-off events. For 326/326 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 737 event pairs, 44 based on Foata normal form. 4/201 useless extension candidates. Maximal degree in co-relation 764. Up to 121 conditions per place. [2022-12-12 16:41:46,512 INFO L137 encePairwiseOnDemand]: 11/17 looper letters, 37 selfloop transitions, 12 changer transitions 0/49 dead transitions. [2022-12-12 16:41:46,512 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 49 transitions, 321 flow [2022-12-12 16:41:46,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-12 16:41:46,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-12 16:41:46,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 41 transitions. [2022-12-12 16:41:46,513 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.4823529411764706 [2022-12-12 16:41:46,513 INFO L175 Difference]: Start difference. First operand has 32 places, 26 transitions, 124 flow. Second operand 5 states and 41 transitions. [2022-12-12 16:41:46,514 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 49 transitions, 321 flow [2022-12-12 16:41:46,515 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 49 transitions, 297 flow, removed 8 selfloop flow, removed 1 redundant places. [2022-12-12 16:41:46,515 INFO L231 Difference]: Finished difference. Result has 38 places, 32 transitions, 203 flow [2022-12-12 16:41:46,516 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=17, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=203, PETRI_PLACES=38, PETRI_TRANSITIONS=32} [2022-12-12 16:41:46,516 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 17 predicate places. [2022-12-12 16:41:46,516 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 32 transitions, 203 flow [2022-12-12 16:41:46,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 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) [2022-12-12 16:41:46,516 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 16:41:46,516 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 16:41:46,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-12 16:41:46,517 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 16:41:46,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 16:41:46,517 INFO L85 PathProgramCache]: Analyzing trace with hash -125456389, now seen corresponding path program 4 times [2022-12-12 16:41:46,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 16:41:46,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148177913] [2022-12-12 16:41:46,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 16:41:46,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 16:41:46,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 16:41:46,608 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 16:41:46,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 16:41:46,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148177913] [2022-12-12 16:41:46,608 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148177913] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 16:41:46,608 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-12 16:41:46,608 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-12 16:41:46,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21381256] [2022-12-12 16:41:46,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 16:41:46,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-12 16:41:46,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 16:41:46,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-12 16:41:46,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-12 16:41:46,610 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 17 [2022-12-12 16:41:46,610 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 32 transitions, 203 flow. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 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) [2022-12-12 16:41:46,610 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 16:41:46,610 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 17 [2022-12-12 16:41:46,610 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 16:41:46,701 INFO L130 PetriNetUnfolder]: 117/220 cut-off events. [2022-12-12 16:41:46,702 INFO L131 PetriNetUnfolder]: For 530/530 co-relation queries the response was YES. [2022-12-12 16:41:46,702 INFO L83 FinitePrefix]: Finished finitePrefix Result has 848 conditions, 220 events. 117/220 cut-off events. For 530/530 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 716 event pairs, 50 based on Foata normal form. 4/197 useless extension candidates. Maximal degree in co-relation 824. Up to 177 conditions per place. [2022-12-12 16:41:46,703 INFO L137 encePairwiseOnDemand]: 11/17 looper letters, 32 selfloop transitions, 15 changer transitions 0/47 dead transitions. [2022-12-12 16:41:46,703 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 47 transitions, 375 flow [2022-12-12 16:41:46,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-12 16:41:46,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-12 16:41:46,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 35 transitions. [2022-12-12 16:41:46,704 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.4117647058823529 [2022-12-12 16:41:46,704 INFO L175 Difference]: Start difference. First operand has 38 places, 32 transitions, 203 flow. Second operand 5 states and 35 transitions. [2022-12-12 16:41:46,704 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 47 transitions, 375 flow [2022-12-12 16:41:46,706 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 47 transitions, 362 flow, removed 3 selfloop flow, removed 1 redundant places. [2022-12-12 16:41:46,707 INFO L231 Difference]: Finished difference. Result has 43 places, 38 transitions, 296 flow [2022-12-12 16:41:46,707 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=17, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=296, PETRI_PLACES=43, PETRI_TRANSITIONS=38} [2022-12-12 16:41:46,708 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 22 predicate places. [2022-12-12 16:41:46,708 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 38 transitions, 296 flow [2022-12-12 16:41:46,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 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) [2022-12-12 16:41:46,708 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 16:41:46,708 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 16:41:46,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-12 16:41:46,708 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 16:41:46,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 16:41:46,709 INFO L85 PathProgramCache]: Analyzing trace with hash -567105713, now seen corresponding path program 5 times [2022-12-12 16:41:46,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 16:41:46,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451104668] [2022-12-12 16:41:46,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 16:41:46,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 16:41:46,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 16:41:46,808 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 16:41:46,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 16:41:46,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451104668] [2022-12-12 16:41:46,809 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451104668] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 16:41:46,809 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-12 16:41:46,809 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-12 16:41:46,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984886833] [2022-12-12 16:41:46,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 16:41:46,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-12 16:41:46,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 16:41:46,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-12 16:41:46,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-12 16:41:46,810 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 17 [2022-12-12 16:41:46,810 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 38 transitions, 296 flow. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 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) [2022-12-12 16:41:46,810 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 16:41:46,810 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 17 [2022-12-12 16:41:46,810 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 16:41:46,900 INFO L130 PetriNetUnfolder]: 118/223 cut-off events. [2022-12-12 16:41:46,900 INFO L131 PetriNetUnfolder]: For 680/680 co-relation queries the response was YES. [2022-12-12 16:41:46,901 INFO L83 FinitePrefix]: Finished finitePrefix Result has 960 conditions, 223 events. 118/223 cut-off events. For 680/680 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 741 event pairs, 38 based on Foata normal form. 2/198 useless extension candidates. Maximal degree in co-relation 934. Up to 123 conditions per place. [2022-12-12 16:41:46,902 INFO L137 encePairwiseOnDemand]: 11/17 looper letters, 38 selfloop transitions, 14 changer transitions 0/52 dead transitions. [2022-12-12 16:41:46,902 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 52 transitions, 442 flow [2022-12-12 16:41:46,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-12 16:41:46,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-12 16:41:46,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 39 transitions. [2022-12-12 16:41:46,903 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.4588235294117647 [2022-12-12 16:41:46,903 INFO L175 Difference]: Start difference. First operand has 43 places, 38 transitions, 296 flow. Second operand 5 states and 39 transitions. [2022-12-12 16:41:46,903 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 52 transitions, 442 flow [2022-12-12 16:41:46,905 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 52 transitions, 388 flow, removed 15 selfloop flow, removed 2 redundant places. [2022-12-12 16:41:46,906 INFO L231 Difference]: Finished difference. Result has 46 places, 39 transitions, 282 flow [2022-12-12 16:41:46,906 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=17, PETRI_DIFFERENCE_MINUEND_FLOW=242, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=282, PETRI_PLACES=46, PETRI_TRANSITIONS=39} [2022-12-12 16:41:46,907 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 25 predicate places. [2022-12-12 16:41:46,907 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 39 transitions, 282 flow [2022-12-12 16:41:46,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 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) [2022-12-12 16:41:46,907 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 16:41:46,907 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 16:41:46,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-12 16:41:46,907 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 16:41:46,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 16:41:46,908 INFO L85 PathProgramCache]: Analyzing trace with hash 591237021, now seen corresponding path program 6 times [2022-12-12 16:41:46,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 16:41:46,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645137866] [2022-12-12 16:41:46,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 16:41:46,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 16:41:46,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 16:41:47,044 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 16:41:47,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 16:41:47,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645137866] [2022-12-12 16:41:47,044 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645137866] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 16:41:47,044 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-12 16:41:47,044 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-12 16:41:47,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989385420] [2022-12-12 16:41:47,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 16:41:47,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-12 16:41:47,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 16:41:47,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-12 16:41:47,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-12 16:41:47,045 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 17 [2022-12-12 16:41:47,046 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 39 transitions, 282 flow. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 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) [2022-12-12 16:41:47,046 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 16:41:47,046 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 17 [2022-12-12 16:41:47,046 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 16:41:47,165 INFO L130 PetriNetUnfolder]: 117/216 cut-off events. [2022-12-12 16:41:47,165 INFO L131 PetriNetUnfolder]: For 647/647 co-relation queries the response was YES. [2022-12-12 16:41:47,165 INFO L83 FinitePrefix]: Finished finitePrefix Result has 897 conditions, 216 events. 117/216 cut-off events. For 647/647 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 696 event pairs, 49 based on Foata normal form. 2/191 useless extension candidates. Maximal degree in co-relation 870. Up to 170 conditions per place. [2022-12-12 16:41:47,166 INFO L137 encePairwiseOnDemand]: 11/17 looper letters, 34 selfloop transitions, 15 changer transitions 0/49 dead transitions. [2022-12-12 16:41:47,166 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 49 transitions, 414 flow [2022-12-12 16:41:47,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-12 16:41:47,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-12 16:41:47,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 35 transitions. [2022-12-12 16:41:47,168 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.4117647058823529 [2022-12-12 16:41:47,168 INFO L175 Difference]: Start difference. First operand has 46 places, 39 transitions, 282 flow. Second operand 5 states and 35 transitions. [2022-12-12 16:41:47,168 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 49 transitions, 414 flow [2022-12-12 16:41:47,170 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 49 transitions, 380 flow, removed 2 selfloop flow, removed 3 redundant places. [2022-12-12 16:41:47,171 INFO L231 Difference]: Finished difference. Result has 48 places, 40 transitions, 294 flow [2022-12-12 16:41:47,171 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=17, PETRI_DIFFERENCE_MINUEND_FLOW=250, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=294, PETRI_PLACES=48, PETRI_TRANSITIONS=40} [2022-12-12 16:41:47,172 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 27 predicate places. [2022-12-12 16:41:47,172 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 40 transitions, 294 flow [2022-12-12 16:41:47,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 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) [2022-12-12 16:41:47,172 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 16:41:47,172 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 16:41:47,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-12 16:41:47,172 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 16:41:47,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 16:41:47,173 INFO L85 PathProgramCache]: Analyzing trace with hash -27448607, now seen corresponding path program 1 times [2022-12-12 16:41:47,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 16:41:47,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438130440] [2022-12-12 16:41:47,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 16:41:47,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 16:41:47,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 16:41:47,359 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 16:41:47,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 16:41:47,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438130440] [2022-12-12 16:41:47,359 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438130440] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 16:41:47,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [374295841] [2022-12-12 16:41:47,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 16:41:47,360 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 16:41:47,360 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 16:41:47,386 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 16:41:47,407 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-12 16:41:47,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 16:41:47,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 42 conjunts are in the unsatisfiable core [2022-12-12 16:41:47,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 16:41:47,594 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-12 16:41:47,628 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-12 16:41:47,658 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-12 16:41:47,957 INFO L321 Elim1Store]: treesize reduction 19, result has 42.4 percent of original size [2022-12-12 16:41:47,958 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 255 treesize of output 248 [2022-12-12 16:41:48,418 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 16:41:48,418 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 16:41:50,363 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 16:41:50,363 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 140 treesize of output 92 [2022-12-12 16:41:50,379 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 16:41:50,379 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 540 treesize of output 504 [2022-12-12 16:41:50,401 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 16:41:50,401 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 460 treesize of output 384 [2022-12-12 16:41:50,427 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 16:41:50,427 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 340 treesize of output 324 [2022-12-12 16:41:50,934 INFO L208 tifierPushTermWalker]: Run 10 iterations without descend maybe there is a nontermination bug. [2022-12-12 16:41:50,970 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-12-12 16:41:50,970 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 55 treesize of output 1 [2022-12-12 16:41:51,014 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 16:41:51,014 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [374295841] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 16:41:51,014 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 16:41:51,015 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 21 [2022-12-12 16:41:51,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675705905] [2022-12-12 16:41:51,015 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 16:41:51,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-12 16:41:51,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 16:41:51,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-12 16:41:51,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=345, Unknown=3, NotChecked=0, Total=420 [2022-12-12 16:41:51,017 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 17 [2022-12-12 16:41:51,018 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 40 transitions, 294 flow. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 16:41:51,018 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 16:41:51,018 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 17 [2022-12-12 16:41:51,018 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 16:42:04,696 WARN L233 SmtUtils]: Spent 8.18s on a formula simplification. DAG size of input: 60 DAG size of output: 58 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-12 16:42:07,304 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.34s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-12 16:42:11,570 INFO L130 PetriNetUnfolder]: 483/900 cut-off events. [2022-12-12 16:42:11,570 INFO L131 PetriNetUnfolder]: For 2268/2268 co-relation queries the response was YES. [2022-12-12 16:42:11,572 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3534 conditions, 900 events. 483/900 cut-off events. For 2268/2268 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 4460 event pairs, 44 based on Foata normal form. 6/758 useless extension candidates. Maximal degree in co-relation 3077. Up to 285 conditions per place. [2022-12-12 16:42:11,574 INFO L137 encePairwiseOnDemand]: 6/17 looper letters, 124 selfloop transitions, 61 changer transitions 73/258 dead transitions. [2022-12-12 16:42:11,574 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 258 transitions, 1886 flow [2022-12-12 16:42:11,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-12-12 16:42:11,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2022-12-12 16:42:11,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 229 transitions. [2022-12-12 16:42:11,590 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.44901960784313727 [2022-12-12 16:42:11,590 INFO L175 Difference]: Start difference. First operand has 48 places, 40 transitions, 294 flow. Second operand 30 states and 229 transitions. [2022-12-12 16:42:11,590 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 258 transitions, 1886 flow [2022-12-12 16:42:11,594 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 258 transitions, 1770 flow, removed 4 selfloop flow, removed 3 redundant places. [2022-12-12 16:42:11,596 INFO L231 Difference]: Finished difference. Result has 86 places, 87 transitions, 820 flow [2022-12-12 16:42:11,597 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=17, PETRI_DIFFERENCE_MINUEND_FLOW=262, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=820, PETRI_PLACES=86, PETRI_TRANSITIONS=87} [2022-12-12 16:42:11,597 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 65 predicate places. [2022-12-12 16:42:11,597 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 87 transitions, 820 flow [2022-12-12 16:42:11,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 16:42:11,597 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 16:42:11,597 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 16:42:11,607 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-12 16:42:11,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 16:42:11,803 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 16:42:11,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 16:42:11,804 INFO L85 PathProgramCache]: Analyzing trace with hash -1430893147, now seen corresponding path program 2 times [2022-12-12 16:42:11,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 16:42:11,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111355787] [2022-12-12 16:42:11,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 16:42:11,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 16:42:11,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 16:42:11,976 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 16:42:11,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 16:42:11,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111355787] [2022-12-12 16:42:11,976 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111355787] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 16:42:11,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354975243] [2022-12-12 16:42:11,976 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-12 16:42:11,977 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 16:42:11,977 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 16:42:11,984 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 16:42:11,986 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-12 16:42:12,088 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-12 16:42:12,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 16:42:12,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 31 conjunts are in the unsatisfiable core [2022-12-12 16:42:12,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 16:42:12,363 INFO L321 Elim1Store]: treesize reduction 19, result has 42.4 percent of original size [2022-12-12 16:42:12,364 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 255 treesize of output 248 [2022-12-12 16:42:12,836 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 16:42:12,836 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 16:42:14,480 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 16:42:14,480 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 395 treesize of output 280 [2022-12-12 16:42:34,196 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 16:42:34,196 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1354975243] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 16:42:34,196 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 16:42:34,197 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 19 [2022-12-12 16:42:34,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500797672] [2022-12-12 16:42:34,197 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 16:42:34,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-12 16:42:34,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 16:42:34,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-12 16:42:34,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2022-12-12 16:42:34,198 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 17 [2022-12-12 16:42:34,198 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 87 transitions, 820 flow. Second operand has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 16:42:34,198 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 16:42:34,198 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 17 [2022-12-12 16:42:34,198 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 16:42:36,854 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-12 16:42:37,776 INFO L130 PetriNetUnfolder]: 358/737 cut-off events. [2022-12-12 16:42:37,776 INFO L131 PetriNetUnfolder]: For 3112/3112 co-relation queries the response was YES. [2022-12-12 16:42:37,778 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3461 conditions, 737 events. 358/737 cut-off events. For 3112/3112 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 3834 event pairs, 103 based on Foata normal form. 9/704 useless extension candidates. Maximal degree in co-relation 3334. Up to 523 conditions per place. [2022-12-12 16:42:37,781 INFO L137 encePairwiseOnDemand]: 7/17 looper letters, 87 selfloop transitions, 52 changer transitions 18/157 dead transitions. [2022-12-12 16:42:37,781 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 157 transitions, 1503 flow [2022-12-12 16:42:37,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-12-12 16:42:37,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2022-12-12 16:42:37,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 120 transitions. [2022-12-12 16:42:37,782 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.32085561497326204 [2022-12-12 16:42:37,782 INFO L175 Difference]: Start difference. First operand has 86 places, 87 transitions, 820 flow. Second operand 22 states and 120 transitions. [2022-12-12 16:42:37,782 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 157 transitions, 1503 flow [2022-12-12 16:42:37,790 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 157 transitions, 1379 flow, removed 60 selfloop flow, removed 5 redundant places. [2022-12-12 16:42:37,792 INFO L231 Difference]: Finished difference. Result has 102 places, 96 transitions, 942 flow [2022-12-12 16:42:37,792 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=17, PETRI_DIFFERENCE_MINUEND_FLOW=724, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=942, PETRI_PLACES=102, PETRI_TRANSITIONS=96} [2022-12-12 16:42:37,793 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 81 predicate places. [2022-12-12 16:42:37,793 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 96 transitions, 942 flow [2022-12-12 16:42:37,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 16:42:37,793 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 16:42:37,793 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 16:42:37,811 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-12-12 16:42:37,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-12-12 16:42:37,999 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 16:42:37,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 16:42:37,999 INFO L85 PathProgramCache]: Analyzing trace with hash 122557265, now seen corresponding path program 3 times [2022-12-12 16:42:37,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 16:42:37,999 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630659600] [2022-12-12 16:42:37,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 16:42:37,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 16:42:38,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 16:42:38,204 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 16:42:38,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 16:42:38,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630659600] [2022-12-12 16:42:38,205 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630659600] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 16:42:38,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105355211] [2022-12-12 16:42:38,205 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-12 16:42:38,205 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 16:42:38,205 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 16:42:38,206 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 16:42:38,251 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-12 16:42:38,354 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-12 16:42:38,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 16:42:38,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 40 conjunts are in the unsatisfiable core [2022-12-12 16:42:38,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 16:42:38,386 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-12 16:42:38,415 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-12 16:42:38,442 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-12 16:42:38,682 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-12 16:42:38,690 INFO L321 Elim1Store]: treesize reduction 15, result has 31.8 percent of original size [2022-12-12 16:42:38,691 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 24 [2022-12-12 16:42:38,719 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 16:42:38,719 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 16:43:01,456 WARN L233 SmtUtils]: Spent 19.62s on a formula simplification. DAG size of input: 6028 DAG size of output: 5341 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) Received shutdown request... [2022-12-12 16:56:15,034 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-12-12 16:56:15,034 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-12-12 16:56:16,054 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-12-12 16:56:16,253 WARN L435 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forcibly destroying the process [2022-12-12 16:56:16,254 WARN L319 FreeRefinementEngine]: Global settings require throwing the following exception [2022-12-12 16:56:16,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-12-12 16:56:16,254 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: Not enough levels on assertion stack at de.uni_freiburg.informatik.ultimate.logic.NoopScript.pop(NoopScript.java:272) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.pop(Scriptor.java:138) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.arrays.DiffWrapperScript.pop(DiffWrapperScript.java:99) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.pop(WrapperScript.java:153) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.scripttransfer.HistoryRecordingScript.pop(HistoryRecordingScript.java:117) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.pop(WrapperScript.java:153) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.UndoableWrapperScript.pop(UndoableWrapperScript.java:61) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.UndoableWrapperScript.restore(UndoableWrapperScript.java:87) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.simplify(SmtUtils.java:247) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.simplifyWithStatistics(SmtUtils.java:265) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify(QuantifierPusher.java:800) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:132) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine$ApplicationTermTask.doStep(TermContextTransformationEngine.java:169) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:77) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:61) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:295) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:281) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.PartialQuantifierElimination.eliminate(PartialQuantifierElimination.java:90) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer$QuantifierEliminationPostprocessor.postprocess(IterativePredicateTransformer.java:238) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:420) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeBackwardSequence(IterativePredicateTransformer.java:399) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeWeakestPreconditionSequence(IterativePredicateTransformer.java:271) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:342) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:185) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:163) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-12-12 16:56:16,262 INFO L158 Benchmark]: Toolchain (without parser) took 878961.23ms. Allocated memory was 205.5MB in the beginning and 601.9MB in the end (delta: 396.4MB). Free memory was 182.4MB in the beginning and 237.0MB in the end (delta: -54.7MB). Peak memory consumption was 379.7MB. Max. memory is 8.0GB. [2022-12-12 16:56:16,262 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 205.5MB. Free memory is still 184.7MB. There was no memory consumed. Max. memory is 8.0GB. [2022-12-12 16:56:16,262 INFO L158 Benchmark]: CACSL2BoogieTranslator took 260.90ms. Allocated memory is still 205.5MB. Free memory was 182.4MB in the beginning and 170.6MB in the end (delta: 11.8MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-12-12 16:56:16,262 INFO L158 Benchmark]: Boogie Procedure Inliner took 32.02ms. Allocated memory is still 205.5MB. Free memory was 170.1MB in the beginning and 168.0MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-12-12 16:56:16,262 INFO L158 Benchmark]: Boogie Preprocessor took 29.63ms. Allocated memory is still 205.5MB. Free memory was 168.0MB in the beginning and 166.4MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-12-12 16:56:16,262 INFO L158 Benchmark]: RCFGBuilder took 462.11ms. Allocated memory is still 205.5MB. Free memory was 166.4MB in the beginning and 147.5MB in the end (delta: 18.9MB). Peak memory consumption was 18.9MB. Max. memory is 8.0GB. [2022-12-12 16:56:16,263 INFO L158 Benchmark]: TraceAbstraction took 878169.35ms. Allocated memory was 205.5MB in the beginning and 601.9MB in the end (delta: 396.4MB). Free memory was 145.9MB in the beginning and 237.0MB in the end (delta: -91.1MB). Peak memory consumption was 343.0MB. Max. memory is 8.0GB. [2022-12-12 16:56:16,263 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### [2022-12-12 16:56:16,266 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 137 --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13ms. Allocated memory is still 205.5MB. Free memory is still 184.7MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 260.90ms. Allocated memory is still 205.5MB. Free memory was 182.4MB in the beginning and 170.6MB in the end (delta: 11.8MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 32.02ms. Allocated memory is still 205.5MB. Free memory was 170.1MB in the beginning and 168.0MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 29.63ms. Allocated memory is still 205.5MB. Free memory was 168.0MB in the beginning and 166.4MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 462.11ms. Allocated memory is still 205.5MB. Free memory was 166.4MB in the beginning and 147.5MB in the end (delta: 18.9MB). Peak memory consumption was 18.9MB. Max. memory is 8.0GB. * TraceAbstraction took 878169.35ms. Allocated memory was 205.5MB in the beginning and 601.9MB in the end (delta: 396.4MB). Free memory was 145.9MB in the beginning and 237.0MB in the end (delta: -91.1MB). Peak memory consumption was 343.0MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 6.4s, 195 PlacesBefore, 21 PlacesAfterwards, 209 TransitionsBefore, 17 TransitionsAfterwards, 5492 CoEnabledTransitionPairs, 3 FixpointIterations, 0 TrivialSequentialCompositions, 0 ConcurrentSequentialCompositions, 64 TrivialYvCompositions, 110 ConcurrentYvCompositions, 15 ChoiceCompositions, 189 TotalNumberOfCompositions, Independence Relation Statistics: ConditionTransformingIndependenceRelation.Independence Queries: [ total: 3350, independent: 3349, independent conditional: 3349, independent unconditional: 0, dependent: 1, dependent conditional: 1, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ConditionTransformingIndependenceRelation.Statistics on underlying relation: DisjunctiveConditionalIndependenceRelation.Independence Queries: [ total: 3350, independent: 3349, independent conditional: 0, independent unconditional: 3349, dependent: 1, dependent conditional: 0, dependent unconditional: 1, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , DisjunctiveConditionalIndependenceRelation.Statistics on underlying relation: SemanticConditionEliminator.Independence Queries: [ total: 3350, independent: 3349, independent conditional: 0, independent unconditional: 3349, dependent: 1, dependent conditional: 0, dependent unconditional: 1, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticConditionEliminator.Statistics on underlying relation: CachedIndependenceRelation.Independence Queries: [ total: 3350, independent: 3349, independent conditional: 0, independent unconditional: 3349, dependent: 1, dependent conditional: 0, dependent unconditional: 1, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 3038, independent: 3037, independent conditional: 0, independent unconditional: 3037, dependent: 1, dependent conditional: 0, dependent unconditional: 1, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 3038, independent: 3037, independent conditional: 0, independent unconditional: 3037, dependent: 1, dependent conditional: 0, dependent unconditional: 1, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 1, independent: 0, independent conditional: 0, independent unconditional: 0, dependent: 1, dependent conditional: 0, dependent unconditional: 1, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 2, independent: 0, independent conditional: 0, independent unconditional: 0, dependent: 2, dependent conditional: 0, dependent unconditional: 2, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 3350, independent: 312, independent conditional: 0, independent unconditional: 312, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 3038, unknown conditional: 0, unknown unconditional: 3038] , Statistics on independence cache: Total cache size (in pairs): 5958, Positive cache size: 5957, Positive conditional cache size: 0, Positive unconditional cache size: 5957, Negative cache size: 1, Negative conditional cache size: 0, Negative unconditional cache size: 1, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0, Eliminated conditions: 0, Maximal queried relation: -1 - ExceptionOrErrorResult: SMTLIBException: Not enough levels on assertion stack de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: Not enough levels on assertion stack: de.uni_freiburg.informatik.ultimate.logic.NoopScript.pop(NoopScript.java:272) RESULT: Ultimate could not prove your program: Toolchain returned no result. Completed graceful shutdown