/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-NoLbe-After.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/popl20-queue-add-2.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-bf34d27 [2022-01-19 14:52:33,002 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-19 14:52:33,003 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-19 14:52:33,033 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-19 14:52:33,034 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-19 14:52:33,043 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-19 14:52:33,045 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-19 14:52:33,049 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-19 14:52:33,050 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-19 14:52:33,054 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-19 14:52:33,055 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-19 14:52:33,056 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-19 14:52:33,056 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-19 14:52:33,058 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-19 14:52:33,059 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-19 14:52:33,061 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-19 14:52:33,061 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-19 14:52:33,062 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-19 14:52:33,063 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-19 14:52:33,067 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-19 14:52:33,068 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-19 14:52:33,069 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-19 14:52:33,070 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-19 14:52:33,070 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-19 14:52:33,075 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-01-19 14:52:33,075 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-01-19 14:52:33,075 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-01-19 14:52:33,076 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-01-19 14:52:33,076 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-01-19 14:52:33,077 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-01-19 14:52:33,077 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-19 14:52:33,077 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-19 14:52:33,079 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-19 14:52:33,079 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-19 14:52:33,080 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-19 14:52:33,080 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-19 14:52:33,080 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-19 14:52:33,081 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-19 14:52:33,081 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-19 14:52:33,081 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-19 14:52:33,082 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-19 14:52:33,082 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-NoLbe-After.epf [2022-01-19 14:52:33,110 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-19 14:52:33,110 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-19 14:52:33,111 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-19 14:52:33,111 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-19 14:52:33,111 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-19 14:52:33,111 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-19 14:52:33,111 INFO L138 SettingsManager]: * Use SBE=true [2022-01-19 14:52:33,111 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-19 14:52:33,111 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-19 14:52:33,112 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-19 14:52:33,112 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-19 14:52:33,112 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-19 14:52:33,112 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-19 14:52:33,112 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-19 14:52:33,112 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-19 14:52:33,113 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-19 14:52:33,113 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-19 14:52:33,113 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-19 14:52:33,113 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-19 14:52:33,113 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-19 14:52:33,113 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-19 14:52:33,113 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-19 14:52:33,113 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-19 14:52:33,113 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-19 14:52:33,113 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-19 14:52:33,114 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-19 14:52:33,114 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-19 14:52:33,114 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-19 14:52:33,115 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-19 14:52:33,115 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-19 14:52:33,115 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-19 14:52:33,115 INFO L138 SettingsManager]: * When to check the insufficient erros location relative to the other error locations=AFTER [2022-01-19 14:52:33,115 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-01-19 14:52:33,291 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-19 14:52:33,305 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-19 14:52:33,307 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-19 14:52:33,308 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-19 14:52:33,308 INFO L275 PluginConnector]: CDTParser initialized [2022-01-19 14:52:33,309 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-queue-add-2.wvr.c [2022-01-19 14:52:33,350 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/307c9b0b0/8bf7ceeee3be4828b294c00cf56fa6cf/FLAG0b0406fd3 [2022-01-19 14:52:33,712 INFO L306 CDTParser]: Found 1 translation units. [2022-01-19 14:52:33,712 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-queue-add-2.wvr.c [2022-01-19 14:52:33,716 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/307c9b0b0/8bf7ceeee3be4828b294c00cf56fa6cf/FLAG0b0406fd3 [2022-01-19 14:52:33,725 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/307c9b0b0/8bf7ceeee3be4828b294c00cf56fa6cf [2022-01-19 14:52:33,727 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-19 14:52:33,728 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-19 14:52:33,729 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-19 14:52:33,729 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-19 14:52:33,730 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-19 14:52:33,731 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.01 02:52:33" (1/1) ... [2022-01-19 14:52:33,731 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@52b58818 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 02:52:33, skipping insertion in model container [2022-01-19 14:52:33,732 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.01 02:52:33" (1/1) ... [2022-01-19 14:52:33,735 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-19 14:52:33,745 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-19 14:52:33,876 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-queue-add-2.wvr.c[2696,2709] [2022-01-19 14:52:33,887 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-19 14:52:33,893 INFO L203 MainTranslator]: Completed pre-run [2022-01-19 14:52:33,906 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-queue-add-2.wvr.c[2696,2709] [2022-01-19 14:52:33,908 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-19 14:52:33,916 INFO L208 MainTranslator]: Completed translation [2022-01-19 14:52:33,917 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 02:52:33 WrapperNode [2022-01-19 14:52:33,917 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-19 14:52:33,917 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-19 14:52:33,917 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-19 14:52:33,918 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-19 14:52:33,922 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 02:52:33" (1/1) ... [2022-01-19 14:52:33,926 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 02:52:33" (1/1) ... [2022-01-19 14:52:33,941 INFO L137 Inliner]: procedures = 24, calls = 39, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 154 [2022-01-19 14:52:33,941 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-19 14:52:33,942 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-19 14:52:33,942 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-19 14:52:33,942 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-19 14:52:33,951 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 02:52:33" (1/1) ... [2022-01-19 14:52:33,951 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 02:52:33" (1/1) ... [2022-01-19 14:52:33,953 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 02:52:33" (1/1) ... [2022-01-19 14:52:33,953 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 02:52:33" (1/1) ... [2022-01-19 14:52:33,962 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 02:52:33" (1/1) ... [2022-01-19 14:52:33,964 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 02:52:33" (1/1) ... [2022-01-19 14:52:33,965 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 02:52:33" (1/1) ... [2022-01-19 14:52:33,967 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-19 14:52:33,967 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-19 14:52:33,967 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-19 14:52:33,968 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-19 14:52:33,978 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 02:52:33" (1/1) ... [2022-01-19 14:52:33,982 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-19 14:52:33,990 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 14:52:33,998 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) [2022-01-19 14:52:34,021 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 [2022-01-19 14:52:34,034 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-19 14:52:34,034 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-01-19 14:52:34,034 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-01-19 14:52:34,034 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-01-19 14:52:34,034 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-01-19 14:52:34,035 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-19 14:52:34,035 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-19 14:52:34,035 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-19 14:52:34,035 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-01-19 14:52:34,039 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-01-19 14:52:34,039 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-01-19 14:52:34,039 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-19 14:52:34,039 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-19 14:52:34,039 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-19 14:52:34,039 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-19 14:52:34,040 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-01-19 14:52:34,093 INFO L234 CfgBuilder]: Building ICFG [2022-01-19 14:52:34,094 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-19 14:52:34,252 INFO L275 CfgBuilder]: Performing block encoding [2022-01-19 14:52:34,348 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-19 14:52:34,349 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-01-19 14:52:34,350 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.01 02:52:34 BoogieIcfgContainer [2022-01-19 14:52:34,350 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-19 14:52:34,351 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-19 14:52:34,351 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-19 14:52:34,359 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-19 14:52:34,359 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.01 02:52:33" (1/3) ... [2022-01-19 14:52:34,360 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c341c8a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.01 02:52:34, skipping insertion in model container [2022-01-19 14:52:34,360 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 02:52:33" (2/3) ... [2022-01-19 14:52:34,360 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c341c8a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.01 02:52:34, skipping insertion in model container [2022-01-19 14:52:34,360 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.01 02:52:34" (3/3) ... [2022-01-19 14:52:34,361 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-queue-add-2.wvr.c [2022-01-19 14:52:34,364 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-19 14:52:34,364 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-19 14:52:34,364 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-01-19 14:52:34,410 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:52:34,411 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:52:34,411 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:52:34,411 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:52:34,411 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:52:34,411 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:52:34,412 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:52:34,412 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:52:34,412 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:52:34,412 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:52:34,412 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:52:34,412 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:52:34,412 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:52:34,413 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:52:34,413 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:52:34,413 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:52:34,413 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:52:34,413 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:52:34,413 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:52:34,414 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:52:34,414 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:52:34,414 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:52:34,414 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:52:34,414 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:52:34,414 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:52:34,414 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:52:34,414 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:52:34,415 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:52:34,415 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:52:34,415 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:52:34,415 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:52:34,415 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:52:34,415 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:52:34,415 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:52:34,415 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:52:34,415 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:52:34,416 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~j~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:52:34,416 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~j~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:52:34,416 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:52:34,416 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:52:34,416 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:52:34,416 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:52:34,416 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post7#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:52:34,416 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:52:34,417 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:52:34,417 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~j~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:52:34,417 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:52:34,417 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post7#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:52:34,417 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:52:34,417 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:52:34,417 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~j~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:52:34,417 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:52:34,418 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~j~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:52:34,418 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~j~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:52:34,418 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~j~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:52:34,418 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~j~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:52:34,418 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~j~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:52:34,418 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~j~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:52:34,420 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:52:34,420 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~j~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:52:34,421 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:52:34,421 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:52:34,421 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:52:34,421 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:52:34,421 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post7#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:52:34,421 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:52:34,422 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:52:34,422 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:52:34,422 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:52:34,422 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:52:34,422 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:52:34,422 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:52:34,422 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:52:34,422 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:52:34,422 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 14:52:34,433 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-01-19 14:52:34,474 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-19 14:52:34,479 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2022-01-19 14:52:34,479 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-01-19 14:52:34,487 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 132 places, 136 transitions, 288 flow [2022-01-19 14:52:34,535 INFO L129 PetriNetUnfolder]: 11/134 cut-off events. [2022-01-19 14:52:34,535 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-01-19 14:52:34,537 INFO L84 FinitePrefix]: Finished finitePrefix Result has 143 conditions, 134 events. 11/134 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 68 event pairs, 0 based on Foata normal form. 0/122 useless extension candidates. Maximal degree in co-relation 99. Up to 3 conditions per place. [2022-01-19 14:52:34,537 INFO L82 GeneralOperation]: Start removeDead. Operand has 132 places, 136 transitions, 288 flow [2022-01-19 14:52:34,541 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 121 places, 125 transitions, 262 flow [2022-01-19 14:52:34,558 INFO L129 PetriNetUnfolder]: 11/124 cut-off events. [2022-01-19 14:52:34,558 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-01-19 14:52:34,559 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:52:34,559 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 14:52:34,559 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 14:52:34,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:52:34,563 INFO L85 PathProgramCache]: Analyzing trace with hash 321786498, now seen corresponding path program 1 times [2022-01-19 14:52:34,568 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:52:34,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226176570] [2022-01-19 14:52:34,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:52:34,569 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:52:34,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:52:34,711 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:52:34,712 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:52:34,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226176570] [2022-01-19 14:52:34,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226176570] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 14:52:34,713 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 14:52:34,713 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-19 14:52:34,714 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241429308] [2022-01-19 14:52:34,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 14:52:34,721 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-01-19 14:52:34,721 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:52:34,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-01-19 14:52:34,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-19 14:52:34,741 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 136 [2022-01-19 14:52:34,746 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 125 transitions, 262 flow. Second operand has 2 states, 2 states have (on average 123.5) internal successors, (247), 2 states have internal predecessors, (247), 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) [2022-01-19 14:52:34,746 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:52:34,746 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 136 [2022-01-19 14:52:34,747 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:52:34,790 INFO L129 PetriNetUnfolder]: 12/147 cut-off events. [2022-01-19 14:52:34,790 INFO L130 PetriNetUnfolder]: For 13/13 co-relation queries the response was YES. [2022-01-19 14:52:34,791 INFO L84 FinitePrefix]: Finished finitePrefix Result has 183 conditions, 147 events. 12/147 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 172 event pairs, 5 based on Foata normal form. 14/150 useless extension candidates. Maximal degree in co-relation 97. Up to 22 conditions per place. [2022-01-19 14:52:34,793 INFO L132 encePairwiseOnDemand]: 128/136 looper letters, 7 selfloop transitions, 0 changer transitions 4/117 dead transitions. [2022-01-19 14:52:34,793 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 117 transitions, 260 flow [2022-01-19 14:52:34,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-01-19 14:52:34,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-01-19 14:52:34,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 255 transitions. [2022-01-19 14:52:34,815 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9375 [2022-01-19 14:52:34,816 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 255 transitions. [2022-01-19 14:52:34,816 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 255 transitions. [2022-01-19 14:52:34,817 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:52:34,818 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 255 transitions. [2022-01-19 14:52:34,828 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 127.5) internal successors, (255), 2 states have internal predecessors, (255), 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) [2022-01-19 14:52:34,834 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 136.0) internal successors, (408), 3 states have internal predecessors, (408), 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) [2022-01-19 14:52:34,834 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 136.0) internal successors, (408), 3 states have internal predecessors, (408), 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) [2022-01-19 14:52:34,835 INFO L186 Difference]: Start difference. First operand has 121 places, 125 transitions, 262 flow. Second operand 2 states and 255 transitions. [2022-01-19 14:52:34,836 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 117 transitions, 260 flow [2022-01-19 14:52:34,838 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 117 transitions, 252 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-01-19 14:52:34,842 INFO L242 Difference]: Finished difference. Result has 118 places, 113 transitions, 230 flow [2022-01-19 14:52:34,843 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=238, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=230, PETRI_PLACES=118, PETRI_TRANSITIONS=113} [2022-01-19 14:52:34,845 INFO L334 CegarLoopForPetriNet]: 121 programPoint places, -3 predicate places. [2022-01-19 14:52:34,845 INFO L470 AbstractCegarLoop]: Abstraction has has 118 places, 113 transitions, 230 flow [2022-01-19 14:52:34,845 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 123.5) internal successors, (247), 2 states have internal predecessors, (247), 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) [2022-01-19 14:52:34,845 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:52:34,846 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 14:52:34,846 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-19 14:52:34,846 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 14:52:34,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:52:34,847 INFO L85 PathProgramCache]: Analyzing trace with hash -632914253, now seen corresponding path program 1 times [2022-01-19 14:52:34,847 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:52:34,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437518875] [2022-01-19 14:52:34,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:52:34,847 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:52:34,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:52:35,003 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:52:35,003 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:52:35,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437518875] [2022-01-19 14:52:35,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437518875] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 14:52:35,004 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 14:52:35,004 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-19 14:52:35,004 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56437105] [2022-01-19 14:52:35,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 14:52:35,005 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-19 14:52:35,005 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:52:35,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-19 14:52:35,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-19 14:52:35,010 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 136 [2022-01-19 14:52:35,011 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 113 transitions, 230 flow. Second operand has 6 states, 6 states have (on average 108.66666666666667) internal successors, (652), 6 states have internal predecessors, (652), 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) [2022-01-19 14:52:35,011 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:52:35,011 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 136 [2022-01-19 14:52:35,011 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:52:35,132 INFO L129 PetriNetUnfolder]: 12/179 cut-off events. [2022-01-19 14:52:35,132 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-01-19 14:52:35,133 INFO L84 FinitePrefix]: Finished finitePrefix Result has 230 conditions, 179 events. 12/179 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 250 event pairs, 5 based on Foata normal form. 5/175 useless extension candidates. Maximal degree in co-relation 227. Up to 31 conditions per place. [2022-01-19 14:52:35,135 INFO L132 encePairwiseOnDemand]: 126/136 looper letters, 19 selfloop transitions, 6 changer transitions 3/120 dead transitions. [2022-01-19 14:52:35,135 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 120 transitions, 302 flow [2022-01-19 14:52:35,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-19 14:52:35,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-01-19 14:52:35,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 773 transitions. [2022-01-19 14:52:35,141 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8119747899159664 [2022-01-19 14:52:35,141 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 773 transitions. [2022-01-19 14:52:35,141 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 773 transitions. [2022-01-19 14:52:35,142 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:52:35,142 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 773 transitions. [2022-01-19 14:52:35,143 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 110.42857142857143) internal successors, (773), 7 states have internal predecessors, (773), 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) [2022-01-19 14:52:35,146 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 136.0) internal successors, (1088), 8 states have internal predecessors, (1088), 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) [2022-01-19 14:52:35,147 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 136.0) internal successors, (1088), 8 states have internal predecessors, (1088), 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) [2022-01-19 14:52:35,147 INFO L186 Difference]: Start difference. First operand has 118 places, 113 transitions, 230 flow. Second operand 7 states and 773 transitions. [2022-01-19 14:52:35,147 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 120 transitions, 302 flow [2022-01-19 14:52:35,148 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 120 transitions, 302 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-01-19 14:52:35,150 INFO L242 Difference]: Finished difference. Result has 122 places, 114 transitions, 256 flow [2022-01-19 14:52:35,151 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=230, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=256, PETRI_PLACES=122, PETRI_TRANSITIONS=114} [2022-01-19 14:52:35,153 INFO L334 CegarLoopForPetriNet]: 121 programPoint places, 1 predicate places. [2022-01-19 14:52:35,153 INFO L470 AbstractCegarLoop]: Abstraction has has 122 places, 114 transitions, 256 flow [2022-01-19 14:52:35,154 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 108.66666666666667) internal successors, (652), 6 states have internal predecessors, (652), 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) [2022-01-19 14:52:35,154 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:52:35,154 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 14:52:35,155 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-19 14:52:35,155 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 14:52:35,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:52:35,158 INFO L85 PathProgramCache]: Analyzing trace with hash 853527032, now seen corresponding path program 1 times [2022-01-19 14:52:35,159 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:52:35,159 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915575125] [2022-01-19 14:52:35,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:52:35,159 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:52:35,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:52:35,275 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-19 14:52:35,276 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:52:35,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915575125] [2022-01-19 14:52:35,276 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915575125] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 14:52:35,276 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 14:52:35,276 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-19 14:52:35,276 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165592930] [2022-01-19 14:52:35,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 14:52:35,277 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-19 14:52:35,277 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:52:35,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-19 14:52:35,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-19 14:52:35,278 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 136 [2022-01-19 14:52:35,278 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 114 transitions, 256 flow. Second operand has 3 states, 3 states have (on average 119.33333333333333) internal successors, (358), 3 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:52:35,278 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:52:35,278 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 136 [2022-01-19 14:52:35,279 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:52:35,310 INFO L129 PetriNetUnfolder]: 13/156 cut-off events. [2022-01-19 14:52:35,312 INFO L130 PetriNetUnfolder]: For 17/17 co-relation queries the response was YES. [2022-01-19 14:52:35,317 INFO L84 FinitePrefix]: Finished finitePrefix Result has 214 conditions, 156 events. 13/156 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 162 event pairs, 1 based on Foata normal form. 1/151 useless extension candidates. Maximal degree in co-relation 208. Up to 23 conditions per place. [2022-01-19 14:52:35,317 INFO L132 encePairwiseOnDemand]: 132/136 looper letters, 11 selfloop transitions, 3 changer transitions 0/117 dead transitions. [2022-01-19 14:52:35,317 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 117 transitions, 295 flow [2022-01-19 14:52:35,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-19 14:52:35,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-01-19 14:52:35,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 363 transitions. [2022-01-19 14:52:35,319 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8897058823529411 [2022-01-19 14:52:35,319 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 363 transitions. [2022-01-19 14:52:35,319 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 363 transitions. [2022-01-19 14:52:35,320 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:52:35,320 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 363 transitions. [2022-01-19 14:52:35,320 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 121.0) internal successors, (363), 3 states have internal predecessors, (363), 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) [2022-01-19 14:52:35,321 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 136.0) internal successors, (544), 4 states have internal predecessors, (544), 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) [2022-01-19 14:52:35,321 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 136.0) internal successors, (544), 4 states have internal predecessors, (544), 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) [2022-01-19 14:52:35,321 INFO L186 Difference]: Start difference. First operand has 122 places, 114 transitions, 256 flow. Second operand 3 states and 363 transitions. [2022-01-19 14:52:35,322 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 117 transitions, 295 flow [2022-01-19 14:52:35,323 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 117 transitions, 285 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-01-19 14:52:35,327 INFO L242 Difference]: Finished difference. Result has 120 places, 116 transitions, 269 flow [2022-01-19 14:52:35,327 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=246, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=269, PETRI_PLACES=120, PETRI_TRANSITIONS=116} [2022-01-19 14:52:35,328 INFO L334 CegarLoopForPetriNet]: 121 programPoint places, -1 predicate places. [2022-01-19 14:52:35,328 INFO L470 AbstractCegarLoop]: Abstraction has has 120 places, 116 transitions, 269 flow [2022-01-19 14:52:35,329 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 119.33333333333333) internal successors, (358), 3 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:52:35,329 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:52:35,329 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 14:52:35,329 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-19 14:52:35,329 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 14:52:35,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:52:35,332 INFO L85 PathProgramCache]: Analyzing trace with hash -1991812262, now seen corresponding path program 2 times [2022-01-19 14:52:35,332 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:52:35,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859863338] [2022-01-19 14:52:35,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:52:35,333 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:52:35,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:52:35,577 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-19 14:52:35,577 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:52:35,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859863338] [2022-01-19 14:52:35,577 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859863338] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 14:52:35,578 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 14:52:35,578 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-01-19 14:52:35,578 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164411973] [2022-01-19 14:52:35,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 14:52:35,579 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-19 14:52:35,580 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:52:35,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-19 14:52:35,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2022-01-19 14:52:35,585 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 136 [2022-01-19 14:52:35,586 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 116 transitions, 269 flow. Second operand has 12 states, 12 states have (on average 90.5) internal successors, (1086), 12 states have internal predecessors, (1086), 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) [2022-01-19 14:52:35,586 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:52:35,586 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 136 [2022-01-19 14:52:35,586 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:52:35,744 INFO L129 PetriNetUnfolder]: 82/335 cut-off events. [2022-01-19 14:52:35,745 INFO L130 PetriNetUnfolder]: For 103/103 co-relation queries the response was YES. [2022-01-19 14:52:35,746 INFO L84 FinitePrefix]: Finished finitePrefix Result has 644 conditions, 335 events. 82/335 cut-off events. For 103/103 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1209 event pairs, 20 based on Foata normal form. 1/312 useless extension candidates. Maximal degree in co-relation 637. Up to 73 conditions per place. [2022-01-19 14:52:35,748 INFO L132 encePairwiseOnDemand]: 121/136 looper letters, 49 selfloop transitions, 13 changer transitions 6/147 dead transitions. [2022-01-19 14:52:35,748 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 147 transitions, 498 flow [2022-01-19 14:52:35,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-19 14:52:35,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-01-19 14:52:35,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1213 transitions. [2022-01-19 14:52:35,751 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6860859728506787 [2022-01-19 14:52:35,751 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1213 transitions. [2022-01-19 14:52:35,751 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1213 transitions. [2022-01-19 14:52:35,752 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:52:35,752 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1213 transitions. [2022-01-19 14:52:35,754 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 93.3076923076923) internal successors, (1213), 13 states have internal predecessors, (1213), 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) [2022-01-19 14:52:35,756 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 136.0) internal successors, (1904), 14 states have internal predecessors, (1904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:52:35,757 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 136.0) internal successors, (1904), 14 states have internal predecessors, (1904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 14:52:35,757 INFO L186 Difference]: Start difference. First operand has 120 places, 116 transitions, 269 flow. Second operand 13 states and 1213 transitions. [2022-01-19 14:52:35,757 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 147 transitions, 498 flow [2022-01-19 14:52:35,760 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 147 transitions, 473 flow, removed 11 selfloop flow, removed 2 redundant places. [2022-01-19 14:52:35,764 INFO L242 Difference]: Finished difference. Result has 135 places, 122 transitions, 318 flow [2022-01-19 14:52:35,764 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=256, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=318, PETRI_PLACES=135, PETRI_TRANSITIONS=122} [2022-01-19 14:52:35,765 INFO L334 CegarLoopForPetriNet]: 121 programPoint places, 14 predicate places. [2022-01-19 14:52:35,765 INFO L470 AbstractCegarLoop]: Abstraction has has 135 places, 122 transitions, 318 flow [2022-01-19 14:52:35,766 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 90.5) internal successors, (1086), 12 states have internal predecessors, (1086), 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) [2022-01-19 14:52:35,766 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:52:35,766 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 14:52:35,766 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-19 14:52:35,766 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 14:52:35,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:52:35,767 INFO L85 PathProgramCache]: Analyzing trace with hash -199541928, now seen corresponding path program 1 times [2022-01-19 14:52:35,767 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:52:35,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893680835] [2022-01-19 14:52:35,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:52:35,768 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:52:35,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:52:35,907 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:52:35,908 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:52:35,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893680835] [2022-01-19 14:52:35,908 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893680835] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 14:52:35,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750691069] [2022-01-19 14:52:35,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:52:35,908 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:52:35,908 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 14:52:35,910 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) [2022-01-19 14:52:35,910 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-19 14:52:35,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:52:35,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-19 14:52:35,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 14:52:36,274 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-19 14:52:36,274 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-19 14:52:36,274 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1750691069] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 14:52:36,274 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-19 14:52:36,274 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [11] total 12 [2022-01-19 14:52:36,275 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849948324] [2022-01-19 14:52:36,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 14:52:36,275 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-19 14:52:36,275 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:52:36,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-19 14:52:36,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2022-01-19 14:52:36,276 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 136 [2022-01-19 14:52:36,277 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 122 transitions, 318 flow. Second operand has 4 states, 4 states have (on average 118.75) internal successors, (475), 4 states have internal predecessors, (475), 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) [2022-01-19 14:52:36,277 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:52:36,277 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 136 [2022-01-19 14:52:36,277 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:52:36,323 INFO L129 PetriNetUnfolder]: 26/275 cut-off events. [2022-01-19 14:52:36,323 INFO L130 PetriNetUnfolder]: For 82/93 co-relation queries the response was YES. [2022-01-19 14:52:36,324 INFO L84 FinitePrefix]: Finished finitePrefix Result has 453 conditions, 275 events. 26/275 cut-off events. For 82/93 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 828 event pairs, 2 based on Foata normal form. 6/277 useless extension candidates. Maximal degree in co-relation 442. Up to 37 conditions per place. [2022-01-19 14:52:36,325 INFO L132 encePairwiseOnDemand]: 132/136 looper letters, 16 selfloop transitions, 7 changer transitions 3/132 dead transitions. [2022-01-19 14:52:36,325 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 132 transitions, 399 flow [2022-01-19 14:52:36,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-19 14:52:36,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-01-19 14:52:36,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 487 transitions. [2022-01-19 14:52:36,326 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8952205882352942 [2022-01-19 14:52:36,326 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 487 transitions. [2022-01-19 14:52:36,326 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 487 transitions. [2022-01-19 14:52:36,327 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:52:36,329 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 487 transitions. [2022-01-19 14:52:36,331 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 121.75) internal successors, (487), 4 states have internal predecessors, (487), 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) [2022-01-19 14:52:36,332 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 136.0) internal successors, (680), 5 states have internal predecessors, (680), 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) [2022-01-19 14:52:36,332 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 136.0) internal successors, (680), 5 states have internal predecessors, (680), 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) [2022-01-19 14:52:36,332 INFO L186 Difference]: Start difference. First operand has 135 places, 122 transitions, 318 flow. Second operand 4 states and 487 transitions. [2022-01-19 14:52:36,332 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 132 transitions, 399 flow [2022-01-19 14:52:36,335 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 132 transitions, 383 flow, removed 3 selfloop flow, removed 7 redundant places. [2022-01-19 14:52:36,336 INFO L242 Difference]: Finished difference. Result has 130 places, 123 transitions, 336 flow [2022-01-19 14:52:36,336 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=295, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=336, PETRI_PLACES=130, PETRI_TRANSITIONS=123} [2022-01-19 14:52:36,338 INFO L334 CegarLoopForPetriNet]: 121 programPoint places, 9 predicate places. [2022-01-19 14:52:36,338 INFO L470 AbstractCegarLoop]: Abstraction has has 130 places, 123 transitions, 336 flow [2022-01-19 14:52:36,338 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 118.75) internal successors, (475), 4 states have internal predecessors, (475), 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) [2022-01-19 14:52:36,338 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:52:36,338 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 14:52:36,358 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-19 14:52:36,551 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:52:36,551 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 14:52:36,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:52:36,552 INFO L85 PathProgramCache]: Analyzing trace with hash -1155105201, now seen corresponding path program 1 times [2022-01-19 14:52:36,552 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:52:36,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885633910] [2022-01-19 14:52:36,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:52:36,552 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:52:36,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:52:36,625 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:52:36,625 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:52:36,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885633910] [2022-01-19 14:52:36,625 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885633910] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 14:52:36,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2030921649] [2022-01-19 14:52:36,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:52:36,626 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:52:36,626 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 14:52:36,627 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) [2022-01-19 14:52:36,628 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-19 14:52:36,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:52:36,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-19 14:52:36,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 14:52:36,933 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:52:36,933 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 14:52:37,179 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:52:37,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2030921649] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 14:52:37,179 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 14:52:37,179 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-01-19 14:52:37,179 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643581352] [2022-01-19 14:52:37,179 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 14:52:37,180 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-19 14:52:37,182 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:52:37,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-19 14:52:37,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2022-01-19 14:52:37,186 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 136 [2022-01-19 14:52:37,187 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 123 transitions, 336 flow. Second operand has 19 states, 19 states have (on average 105.63157894736842) internal successors, (2007), 19 states have internal predecessors, (2007), 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) [2022-01-19 14:52:37,187 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:52:37,187 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 136 [2022-01-19 14:52:37,187 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:52:37,349 INFO L129 PetriNetUnfolder]: 26/315 cut-off events. [2022-01-19 14:52:37,350 INFO L130 PetriNetUnfolder]: For 212/255 co-relation queries the response was YES. [2022-01-19 14:52:37,351 INFO L84 FinitePrefix]: Finished finitePrefix Result has 579 conditions, 315 events. 26/315 cut-off events. For 212/255 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 926 event pairs, 6 based on Foata normal form. 7/318 useless extension candidates. Maximal degree in co-relation 568. Up to 54 conditions per place. [2022-01-19 14:52:37,351 INFO L132 encePairwiseOnDemand]: 124/136 looper letters, 28 selfloop transitions, 11 changer transitions 6/137 dead transitions. [2022-01-19 14:52:37,351 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 137 transitions, 475 flow [2022-01-19 14:52:37,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-19 14:52:37,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-01-19 14:52:37,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1277 transitions. [2022-01-19 14:52:37,354 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7824754901960784 [2022-01-19 14:52:37,354 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1277 transitions. [2022-01-19 14:52:37,354 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1277 transitions. [2022-01-19 14:52:37,355 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:52:37,355 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1277 transitions. [2022-01-19 14:52:37,356 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 106.41666666666667) internal successors, (1277), 12 states have internal predecessors, (1277), 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) [2022-01-19 14:52:37,358 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 136.0) internal successors, (1768), 13 states have internal predecessors, (1768), 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) [2022-01-19 14:52:37,359 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 136.0) internal successors, (1768), 13 states have internal predecessors, (1768), 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) [2022-01-19 14:52:37,359 INFO L186 Difference]: Start difference. First operand has 130 places, 123 transitions, 336 flow. Second operand 12 states and 1277 transitions. [2022-01-19 14:52:37,359 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 137 transitions, 475 flow [2022-01-19 14:52:37,362 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 137 transitions, 459 flow, removed 8 selfloop flow, removed 1 redundant places. [2022-01-19 14:52:37,364 INFO L242 Difference]: Finished difference. Result has 144 places, 127 transitions, 385 flow [2022-01-19 14:52:37,364 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=324, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=385, PETRI_PLACES=144, PETRI_TRANSITIONS=127} [2022-01-19 14:52:37,365 INFO L334 CegarLoopForPetriNet]: 121 programPoint places, 23 predicate places. [2022-01-19 14:52:37,366 INFO L470 AbstractCegarLoop]: Abstraction has has 144 places, 127 transitions, 385 flow [2022-01-19 14:52:37,366 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 105.63157894736842) internal successors, (2007), 19 states have internal predecessors, (2007), 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) [2022-01-19 14:52:37,366 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:52:37,367 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 14:52:37,385 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-19 14:52:37,582 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-01-19 14:52:37,583 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 14:52:37,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:52:37,583 INFO L85 PathProgramCache]: Analyzing trace with hash -477337818, now seen corresponding path program 2 times [2022-01-19 14:52:37,583 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:52:37,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327458552] [2022-01-19 14:52:37,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:52:37,584 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:52:37,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:52:38,244 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:52:38,245 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:52:38,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327458552] [2022-01-19 14:52:38,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327458552] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 14:52:38,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1022970025] [2022-01-19 14:52:38,245 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-19 14:52:38,245 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:52:38,245 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 14:52:38,247 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) [2022-01-19 14:52:38,247 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-19 14:52:38,317 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-19 14:52:38,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 14:52:38,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 35 conjunts are in the unsatisfiable core [2022-01-19 14:52:38,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 14:52:38,959 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-01-19 14:52:38,988 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:52:38,989 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 14:52:39,198 INFO L353 Elim1Store]: treesize reduction 9, result has 43.8 percent of original size [2022-01-19 14:52:39,198 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 16 [2022-01-19 14:52:40,126 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:52:40,127 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1022970025] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 14:52:40,127 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 14:52:40,127 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 14, 14] total 45 [2022-01-19 14:52:40,127 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571740309] [2022-01-19 14:52:40,127 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 14:52:40,128 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-01-19 14:52:40,128 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:52:40,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-01-19 14:52:40,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=323, Invalid=1657, Unknown=0, NotChecked=0, Total=1980 [2022-01-19 14:52:40,131 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 136 [2022-01-19 14:52:40,134 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 127 transitions, 385 flow. Second operand has 45 states, 45 states have (on average 67.4888888888889) internal successors, (3037), 45 states have internal predecessors, (3037), 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) [2022-01-19 14:52:40,134 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:52:40,134 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 136 [2022-01-19 14:52:40,134 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:52:42,618 INFO L129 PetriNetUnfolder]: 750/2362 cut-off events. [2022-01-19 14:52:42,618 INFO L130 PetriNetUnfolder]: For 2354/2454 co-relation queries the response was YES. [2022-01-19 14:52:42,625 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5643 conditions, 2362 events. 750/2362 cut-off events. For 2354/2454 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 18401 event pairs, 112 based on Foata normal form. 36/2308 useless extension candidates. Maximal degree in co-relation 5626. Up to 401 conditions per place. [2022-01-19 14:52:42,634 INFO L132 encePairwiseOnDemand]: 108/136 looper letters, 198 selfloop transitions, 76 changer transitions 0/329 dead transitions. [2022-01-19 14:52:42,634 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 329 transitions, 1794 flow [2022-01-19 14:52:42,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-01-19 14:52:42,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2022-01-19 14:52:42,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 2928 transitions. [2022-01-19 14:52:42,639 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5126050420168067 [2022-01-19 14:52:42,639 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 2928 transitions. [2022-01-19 14:52:42,639 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 2928 transitions. [2022-01-19 14:52:42,641 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:52:42,641 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 2928 transitions. [2022-01-19 14:52:42,645 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 43 states, 42 states have (on average 69.71428571428571) internal successors, (2928), 42 states have internal predecessors, (2928), 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) [2022-01-19 14:52:42,651 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 43 states, 43 states have (on average 136.0) internal successors, (5848), 43 states have internal predecessors, (5848), 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) [2022-01-19 14:52:42,652 INFO L81 ComplementDD]: Finished complementDD. Result has 43 states, 43 states have (on average 136.0) internal successors, (5848), 43 states have internal predecessors, (5848), 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) [2022-01-19 14:52:42,652 INFO L186 Difference]: Start difference. First operand has 144 places, 127 transitions, 385 flow. Second operand 42 states and 2928 transitions. [2022-01-19 14:52:42,652 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 329 transitions, 1794 flow [2022-01-19 14:52:42,656 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 329 transitions, 1723 flow, removed 31 selfloop flow, removed 6 redundant places. [2022-01-19 14:52:42,660 INFO L242 Difference]: Finished difference. Result has 200 places, 191 transitions, 1073 flow [2022-01-19 14:52:42,660 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=362, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=1073, PETRI_PLACES=200, PETRI_TRANSITIONS=191} [2022-01-19 14:52:42,661 INFO L334 CegarLoopForPetriNet]: 121 programPoint places, 79 predicate places. [2022-01-19 14:52:42,661 INFO L470 AbstractCegarLoop]: Abstraction has has 200 places, 191 transitions, 1073 flow [2022-01-19 14:52:42,662 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 67.4888888888889) internal successors, (3037), 45 states have internal predecessors, (3037), 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) [2022-01-19 14:52:42,662 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:52:42,662 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 14:52:42,680 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-01-19 14:52:42,875 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:52:42,875 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 14:52:42,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:52:42,876 INFO L85 PathProgramCache]: Analyzing trace with hash 2090966660, now seen corresponding path program 3 times [2022-01-19 14:52:42,876 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:52:42,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845656020] [2022-01-19 14:52:42,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:52:42,876 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:52:42,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:52:43,778 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:52:43,779 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:52:43,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845656020] [2022-01-19 14:52:43,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845656020] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 14:52:43,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [758310533] [2022-01-19 14:52:43,779 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-19 14:52:43,779 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:52:43,780 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 14:52:43,780 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 14:52:43,782 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-19 14:52:43,846 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-19 14:52:43,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 14:52:43,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-19 14:52:43,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 14:52:44,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-19 14:52:44,233 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-01-19 14:52:44,276 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-01-19 14:52:44,310 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-19 14:52:44,310 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 14:52:44,372 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_149 (Array Int Int))) (not (= 0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_149) c_~q~0.base) (+ (* c_~q_front~0 4) c_~q~0.offset))))) is different from false [2022-01-19 14:52:44,413 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-19 14:52:44,414 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 45 [2022-01-19 14:52:44,417 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2022-01-19 14:52:44,841 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-19 14:52:44,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [758310533] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 14:52:44,841 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 14:52:44,842 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 12, 12] total 45 [2022-01-19 14:52:44,842 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542165139] [2022-01-19 14:52:44,842 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 14:52:44,842 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-01-19 14:52:44,842 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:52:44,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-01-19 14:52:44,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=1774, Unknown=1, NotChecked=84, Total=1980 [2022-01-19 14:52:44,844 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 136 [2022-01-19 14:52:44,846 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 191 transitions, 1073 flow. Second operand has 45 states, 45 states have (on average 58.48888888888889) internal successors, (2632), 45 states have internal predecessors, (2632), 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) [2022-01-19 14:52:44,846 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:52:44,846 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 136 [2022-01-19 14:52:44,846 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:52:49,019 INFO L129 PetriNetUnfolder]: 957/2920 cut-off events. [2022-01-19 14:52:49,019 INFO L130 PetriNetUnfolder]: For 15494/15830 co-relation queries the response was YES. [2022-01-19 14:52:49,029 INFO L84 FinitePrefix]: Finished finitePrefix Result has 9788 conditions, 2920 events. 957/2920 cut-off events. For 15494/15830 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 23632 event pairs, 76 based on Foata normal form. 182/3042 useless extension candidates. Maximal degree in co-relation 9750. Up to 541 conditions per place. [2022-01-19 14:52:49,038 INFO L132 encePairwiseOnDemand]: 110/136 looper letters, 186 selfloop transitions, 117 changer transitions 0/352 dead transitions. [2022-01-19 14:52:49,038 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 352 transitions, 2854 flow [2022-01-19 14:52:49,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-01-19 14:52:49,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2022-01-19 14:52:49,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 2635 transitions. [2022-01-19 14:52:49,045 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.4403409090909091 [2022-01-19 14:52:49,045 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 2635 transitions. [2022-01-19 14:52:49,045 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 2635 transitions. [2022-01-19 14:52:49,046 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:52:49,046 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 2635 transitions. [2022-01-19 14:52:49,050 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 59.88636363636363) internal successors, (2635), 44 states have internal predecessors, (2635), 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) [2022-01-19 14:52:49,056 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 136.0) internal successors, (6120), 45 states have internal predecessors, (6120), 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) [2022-01-19 14:52:49,057 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 136.0) internal successors, (6120), 45 states have internal predecessors, (6120), 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) [2022-01-19 14:52:49,057 INFO L186 Difference]: Start difference. First operand has 200 places, 191 transitions, 1073 flow. Second operand 44 states and 2635 transitions. [2022-01-19 14:52:49,057 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 352 transitions, 2854 flow [2022-01-19 14:52:49,074 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 352 transitions, 2700 flow, removed 60 selfloop flow, removed 15 redundant places. [2022-01-19 14:52:49,077 INFO L242 Difference]: Finished difference. Result has 237 places, 236 transitions, 1751 flow [2022-01-19 14:52:49,078 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=971, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=1751, PETRI_PLACES=237, PETRI_TRANSITIONS=236} [2022-01-19 14:52:49,079 INFO L334 CegarLoopForPetriNet]: 121 programPoint places, 116 predicate places. [2022-01-19 14:52:49,079 INFO L470 AbstractCegarLoop]: Abstraction has has 237 places, 236 transitions, 1751 flow [2022-01-19 14:52:49,080 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 58.48888888888889) internal successors, (2632), 45 states have internal predecessors, (2632), 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) [2022-01-19 14:52:49,080 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:52:49,080 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 14:52:49,096 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-01-19 14:52:49,281 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:52:49,281 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 14:52:49,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:52:49,281 INFO L85 PathProgramCache]: Analyzing trace with hash 176551504, now seen corresponding path program 1 times [2022-01-19 14:52:49,281 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:52:49,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150033593] [2022-01-19 14:52:49,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:52:49,281 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:52:49,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:52:50,356 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:52:50,357 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:52:50,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150033593] [2022-01-19 14:52:50,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150033593] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 14:52:50,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689965862] [2022-01-19 14:52:50,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:52:50,357 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:52:50,357 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 14:52:50,358 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 14:52:50,359 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-19 14:52:50,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:52:50,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 60 conjunts are in the unsatisfiable core [2022-01-19 14:52:50,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 14:52:50,446 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 [2022-01-19 14:52:50,719 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-01-19 14:52:50,720 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-01-19 14:52:51,480 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-01-19 14:52:51,909 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-01-19 14:52:52,103 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:52:52,103 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 14:52:52,679 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-19 14:52:52,680 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 111 treesize of output 95 [2022-01-19 14:52:52,683 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 49 [2022-01-19 14:52:54,641 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-01-19 14:52:54,661 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:52:54,661 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [689965862] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 14:52:54,661 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 14:52:54,661 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32, 32] total 85 [2022-01-19 14:52:54,661 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054940718] [2022-01-19 14:52:54,661 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 14:52:54,662 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2022-01-19 14:52:54,662 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:52:54,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2022-01-19 14:52:54,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=515, Invalid=6623, Unknown=2, NotChecked=0, Total=7140 [2022-01-19 14:52:54,665 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 136 [2022-01-19 14:52:54,668 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 236 transitions, 1751 flow. Second operand has 85 states, 85 states have (on average 49.37647058823529) internal successors, (4197), 85 states have internal predecessors, (4197), 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) [2022-01-19 14:52:54,668 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:52:54,668 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 136 [2022-01-19 14:52:54,668 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:53:08,757 INFO L129 PetriNetUnfolder]: 5750/11340 cut-off events. [2022-01-19 14:53:08,757 INFO L130 PetriNetUnfolder]: For 68850/68859 co-relation queries the response was YES. [2022-01-19 14:53:08,801 INFO L84 FinitePrefix]: Finished finitePrefix Result has 43797 conditions, 11340 events. 5750/11340 cut-off events. For 68850/68859 co-relation queries the response was YES. Maximal size of possible extension queue 510. Compared 96386 event pairs, 367 based on Foata normal form. 13/11322 useless extension candidates. Maximal degree in co-relation 43750. Up to 2470 conditions per place. [2022-01-19 14:53:08,844 INFO L132 encePairwiseOnDemand]: 99/136 looper letters, 618 selfloop transitions, 351 changer transitions 46/1055 dead transitions. [2022-01-19 14:53:08,844 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 357 places, 1055 transitions, 9624 flow [2022-01-19 14:53:08,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2022-01-19 14:53:08,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2022-01-19 14:53:08,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 6341 transitions. [2022-01-19 14:53:08,852 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.3853305785123967 [2022-01-19 14:53:08,852 INFO L72 ComplementDD]: Start complementDD. Operand 121 states and 6341 transitions. [2022-01-19 14:53:08,852 INFO L73 IsDeterministic]: Start isDeterministic. Operand 121 states and 6341 transitions. [2022-01-19 14:53:08,855 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:53:08,855 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 121 states and 6341 transitions. [2022-01-19 14:53:08,871 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 122 states, 121 states have (on average 52.40495867768595) internal successors, (6341), 121 states have internal predecessors, (6341), 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) [2022-01-19 14:53:08,885 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 122 states, 122 states have (on average 136.0) internal successors, (16592), 122 states have internal predecessors, (16592), 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) [2022-01-19 14:53:08,887 INFO L81 ComplementDD]: Finished complementDD. Result has 122 states, 122 states have (on average 136.0) internal successors, (16592), 122 states have internal predecessors, (16592), 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) [2022-01-19 14:53:08,887 INFO L186 Difference]: Start difference. First operand has 237 places, 236 transitions, 1751 flow. Second operand 121 states and 6341 transitions. [2022-01-19 14:53:08,887 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 357 places, 1055 transitions, 9624 flow [2022-01-19 14:53:09,123 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 1055 transitions, 9436 flow, removed 62 selfloop flow, removed 29 redundant places. [2022-01-19 14:53:09,131 INFO L242 Difference]: Finished difference. Result has 370 places, 535 transitions, 5321 flow [2022-01-19 14:53:09,132 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=1651, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=236, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=121, PETRI_FLOW=5321, PETRI_PLACES=370, PETRI_TRANSITIONS=535} [2022-01-19 14:53:09,132 INFO L334 CegarLoopForPetriNet]: 121 programPoint places, 249 predicate places. [2022-01-19 14:53:09,132 INFO L470 AbstractCegarLoop]: Abstraction has has 370 places, 535 transitions, 5321 flow [2022-01-19 14:53:09,133 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 49.37647058823529) internal successors, (4197), 85 states have internal predecessors, (4197), 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) [2022-01-19 14:53:09,133 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:53:09,133 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 14:53:09,152 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-01-19 14:53:09,347 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:53:09,347 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 14:53:09,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:53:09,348 INFO L85 PathProgramCache]: Analyzing trace with hash 1651370038, now seen corresponding path program 2 times [2022-01-19 14:53:09,348 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:53:09,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128409114] [2022-01-19 14:53:09,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:53:09,348 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:53:09,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:53:10,199 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:53:10,199 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:53:10,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128409114] [2022-01-19 14:53:10,200 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128409114] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 14:53:10,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48269470] [2022-01-19 14:53:10,200 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-19 14:53:10,200 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:53:10,200 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 14:53:10,201 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 14:53:10,201 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-19 14:53:10,266 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-19 14:53:10,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 14:53:10,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 62 conjunts are in the unsatisfiable core [2022-01-19 14:53:10,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 14:53:11,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-19 14:53:11,442 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-01-19 14:53:11,722 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-01-19 14:53:12,031 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:53:12,031 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 14:53:12,722 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-19 14:53:12,723 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 111 treesize of output 95 [2022-01-19 14:53:12,726 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 49 [2022-01-19 14:53:14,327 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:53:14,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [48269470] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 14:53:14,328 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 14:53:14,328 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 32, 32] total 87 [2022-01-19 14:53:14,328 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164679008] [2022-01-19 14:53:14,328 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 14:53:14,328 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2022-01-19 14:53:14,328 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:53:14,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2022-01-19 14:53:14,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=591, Invalid=6886, Unknown=5, NotChecked=0, Total=7482 [2022-01-19 14:53:14,332 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 136 [2022-01-19 14:53:14,334 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 370 places, 535 transitions, 5321 flow. Second operand has 87 states, 87 states have (on average 48.37931034482759) internal successors, (4209), 87 states have internal predecessors, (4209), 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) [2022-01-19 14:53:14,334 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:53:14,334 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 136 [2022-01-19 14:53:14,334 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:53:35,459 INFO L129 PetriNetUnfolder]: 8600/18069 cut-off events. [2022-01-19 14:53:35,459 INFO L130 PetriNetUnfolder]: For 219267/219293 co-relation queries the response was YES. [2022-01-19 14:53:35,566 INFO L84 FinitePrefix]: Finished finitePrefix Result has 96583 conditions, 18069 events. 8600/18069 cut-off events. For 219267/219293 co-relation queries the response was YES. Maximal size of possible extension queue 965. Compared 177779 event pairs, 198 based on Foata normal form. 359/18394 useless extension candidates. Maximal degree in co-relation 96499. Up to 2824 conditions per place. [2022-01-19 14:53:35,628 INFO L132 encePairwiseOnDemand]: 97/136 looper letters, 699 selfloop transitions, 817 changer transitions 374/1929 dead transitions. [2022-01-19 14:53:35,628 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 541 places, 1929 transitions, 23309 flow [2022-01-19 14:53:35,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 188 states. [2022-01-19 14:53:35,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2022-01-19 14:53:35,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 9729 transitions. [2022-01-19 14:53:35,636 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.3805147058823529 [2022-01-19 14:53:35,636 INFO L72 ComplementDD]: Start complementDD. Operand 188 states and 9729 transitions. [2022-01-19 14:53:35,636 INFO L73 IsDeterministic]: Start isDeterministic. Operand 188 states and 9729 transitions. [2022-01-19 14:53:35,638 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:53:35,638 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 188 states and 9729 transitions. [2022-01-19 14:53:35,647 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 189 states, 188 states have (on average 51.75) internal successors, (9729), 188 states have internal predecessors, (9729), 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) [2022-01-19 14:53:35,664 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 189 states, 189 states have (on average 136.0) internal successors, (25704), 189 states have internal predecessors, (25704), 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) [2022-01-19 14:53:35,667 INFO L81 ComplementDD]: Finished complementDD. Result has 189 states, 189 states have (on average 136.0) internal successors, (25704), 189 states have internal predecessors, (25704), 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) [2022-01-19 14:53:35,667 INFO L186 Difference]: Start difference. First operand has 370 places, 535 transitions, 5321 flow. Second operand 188 states and 9729 transitions. [2022-01-19 14:53:35,667 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 541 places, 1929 transitions, 23309 flow [2022-01-19 14:53:36,574 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 507 places, 1929 transitions, 22746 flow, removed 237 selfloop flow, removed 34 redundant places. [2022-01-19 14:53:36,590 INFO L242 Difference]: Finished difference. Result has 579 places, 1022 transitions, 14126 flow [2022-01-19 14:53:36,591 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=4202, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=464, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=270, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=188, PETRI_FLOW=14126, PETRI_PLACES=579, PETRI_TRANSITIONS=1022} [2022-01-19 14:53:36,591 INFO L334 CegarLoopForPetriNet]: 121 programPoint places, 458 predicate places. [2022-01-19 14:53:36,591 INFO L470 AbstractCegarLoop]: Abstraction has has 579 places, 1022 transitions, 14126 flow [2022-01-19 14:53:36,592 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 87 states have (on average 48.37931034482759) internal successors, (4209), 87 states have internal predecessors, (4209), 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) [2022-01-19 14:53:36,592 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:53:36,592 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 14:53:36,611 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-01-19 14:53:36,807 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:53:36,807 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 14:53:36,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:53:36,808 INFO L85 PathProgramCache]: Analyzing trace with hash -887718634, now seen corresponding path program 3 times [2022-01-19 14:53:36,808 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:53:36,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810788568] [2022-01-19 14:53:36,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:53:36,808 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:53:36,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:53:38,285 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:53:38,285 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:53:38,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810788568] [2022-01-19 14:53:38,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810788568] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 14:53:38,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518492511] [2022-01-19 14:53:38,285 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-19 14:53:38,286 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:53:38,286 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 14:53:38,286 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 14:53:38,287 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-01-19 14:53:38,353 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-19 14:53:38,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 14:53:38,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 43 conjunts are in the unsatisfiable core [2022-01-19 14:53:38,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 14:53:38,375 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 [2022-01-19 14:53:38,541 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-01-19 14:53:38,541 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-01-19 14:53:39,015 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-01-19 14:53:39,188 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-01-19 14:53:39,448 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-19 14:53:39,449 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 14:53:40,028 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-19 14:53:40,028 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 111 treesize of output 95 [2022-01-19 14:53:40,047 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 49 [2022-01-19 14:53:40,779 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-01-19 14:53:40,795 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-19 14:53:40,795 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1518492511] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 14:53:40,795 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 14:53:40,795 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 23, 23] total 67 [2022-01-19 14:53:40,795 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675628528] [2022-01-19 14:53:40,795 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 14:53:40,796 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-01-19 14:53:40,796 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:53:40,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-01-19 14:53:40,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=4192, Unknown=3, NotChecked=0, Total=4422 [2022-01-19 14:53:40,799 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 136 [2022-01-19 14:53:40,800 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 579 places, 1022 transitions, 14126 flow. Second operand has 67 states, 67 states have (on average 47.67164179104478) internal successors, (3194), 67 states have internal predecessors, (3194), 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) [2022-01-19 14:53:40,800 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:53:40,800 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 136 [2022-01-19 14:53:40,800 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:54:01,717 INFO L129 PetriNetUnfolder]: 8204/16873 cut-off events. [2022-01-19 14:54:01,718 INFO L130 PetriNetUnfolder]: For 390935/390961 co-relation queries the response was YES. [2022-01-19 14:54:01,897 INFO L84 FinitePrefix]: Finished finitePrefix Result has 117203 conditions, 16873 events. 8204/16873 cut-off events. For 390935/390961 co-relation queries the response was YES. Maximal size of possible extension queue 945. Compared 161983 event pairs, 542 based on Foata normal form. 26/16846 useless extension candidates. Maximal degree in co-relation 117054. Up to 4003 conditions per place. [2022-01-19 14:54:01,966 INFO L132 encePairwiseOnDemand]: 98/136 looper letters, 725 selfloop transitions, 802 changer transitions 133/1699 dead transitions. [2022-01-19 14:54:01,966 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 654 places, 1699 transitions, 26532 flow [2022-01-19 14:54:01,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2022-01-19 14:54:01,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2022-01-19 14:54:01,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 5908 transitions. [2022-01-19 14:54:01,971 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.3681455633100698 [2022-01-19 14:54:01,971 INFO L72 ComplementDD]: Start complementDD. Operand 118 states and 5908 transitions. [2022-01-19 14:54:01,971 INFO L73 IsDeterministic]: Start isDeterministic. Operand 118 states and 5908 transitions. [2022-01-19 14:54:01,972 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:54:01,972 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 118 states and 5908 transitions. [2022-01-19 14:54:01,978 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 119 states, 118 states have (on average 50.067796610169495) internal successors, (5908), 118 states have internal predecessors, (5908), 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) [2022-01-19 14:54:01,988 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 119 states, 119 states have (on average 136.0) internal successors, (16184), 119 states have internal predecessors, (16184), 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) [2022-01-19 14:54:01,989 INFO L81 ComplementDD]: Finished complementDD. Result has 119 states, 119 states have (on average 136.0) internal successors, (16184), 119 states have internal predecessors, (16184), 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) [2022-01-19 14:54:01,989 INFO L186 Difference]: Start difference. First operand has 579 places, 1022 transitions, 14126 flow. Second operand 118 states and 5908 transitions. [2022-01-19 14:54:01,989 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 654 places, 1699 transitions, 26532 flow [2022-01-19 14:54:04,562 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 566 places, 1699 transitions, 24223 flow, removed 1029 selfloop flow, removed 88 redundant places. [2022-01-19 14:54:04,581 INFO L242 Difference]: Finished difference. Result has 605 places, 1197 transitions, 17531 flow [2022-01-19 14:54:04,581 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=12710, PETRI_DIFFERENCE_MINUEND_PLACES=449, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1022, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=618, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=363, PETRI_DIFFERENCE_SUBTRAHEND_STATES=118, PETRI_FLOW=17531, PETRI_PLACES=605, PETRI_TRANSITIONS=1197} [2022-01-19 14:54:04,582 INFO L334 CegarLoopForPetriNet]: 121 programPoint places, 484 predicate places. [2022-01-19 14:54:04,582 INFO L470 AbstractCegarLoop]: Abstraction has has 605 places, 1197 transitions, 17531 flow [2022-01-19 14:54:04,583 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 47.67164179104478) internal successors, (3194), 67 states have internal predecessors, (3194), 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) [2022-01-19 14:54:04,583 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:54:04,583 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 14:54:04,601 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-01-19 14:54:04,801 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:54:04,801 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 14:54:04,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:54:04,802 INFO L85 PathProgramCache]: Analyzing trace with hash 722440850, now seen corresponding path program 4 times [2022-01-19 14:54:04,802 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:54:04,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708401110] [2022-01-19 14:54:04,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:54:04,802 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:54:04,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:54:05,814 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:54:05,815 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:54:05,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708401110] [2022-01-19 14:54:05,815 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708401110] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 14:54:05,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590360449] [2022-01-19 14:54:05,815 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-19 14:54:05,815 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:54:05,815 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 14:54:05,816 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 14:54:05,817 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-01-19 14:54:05,882 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-19 14:54:05,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 14:54:05,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 62 conjunts are in the unsatisfiable core [2022-01-19 14:54:05,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 14:54:05,912 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 [2022-01-19 14:54:06,135 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-01-19 14:54:06,136 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-01-19 14:54:07,087 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-01-19 14:54:07,248 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 7 [2022-01-19 14:54:07,492 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:54:07,492 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 14:54:07,797 WARN L838 $PredicateComparison]: unable to prove that (or (not (<= 0 c_~q_back~0)) (not (< c_~q_back~0 c_~n~0)) (< |c_thread1Thread1of1ForFork1_~i~0#1| c_~N~0) (and (forall ((v_ArrVal_268 (Array Int Int))) (<= (+ c_~s~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_268) c_~q~0.base) (+ (* c_~q_front~0 4) c_~q~0.offset))) c_~N~0)) (forall ((v_ArrVal_268 (Array Int Int))) (<= c_~N~0 (+ c_~s~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_268) c_~q~0.base) (+ (* c_~q_front~0 4) c_~q~0.offset))))))) is different from false [2022-01-19 14:54:07,874 WARN L838 $PredicateComparison]: unable to prove that (or (not (<= 0 c_~q_back~0)) (not (< c_~q_back~0 c_~n~0)) (< (+ |c_thread1Thread1of1ForFork1_#t~post1#1| 1) c_~N~0) (and (forall ((v_ArrVal_268 (Array Int Int))) (<= (+ c_~s~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_268) c_~q~0.base) (+ (* c_~q_front~0 4) c_~q~0.offset))) c_~N~0)) (forall ((v_ArrVal_268 (Array Int Int))) (<= c_~N~0 (+ c_~s~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_268) c_~q~0.base) (+ (* c_~q_front~0 4) c_~q~0.offset))))))) is different from false [2022-01-19 14:54:07,887 WARN L838 $PredicateComparison]: unable to prove that (or (not (<= 0 c_~q_back~0)) (not (< c_~q_back~0 c_~n~0)) (< (+ |c_thread1Thread1of1ForFork1_~i~0#1| 1) c_~N~0) (and (forall ((v_ArrVal_268 (Array Int Int))) (<= (+ c_~s~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_268) c_~q~0.base) (+ (* c_~q_front~0 4) c_~q~0.offset))) c_~N~0)) (forall ((v_ArrVal_268 (Array Int Int))) (<= c_~N~0 (+ c_~s~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_268) c_~q~0.base) (+ (* c_~q_front~0 4) c_~q~0.offset))))))) is different from false [2022-01-19 14:54:07,904 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-19 14:54:07,904 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 82 treesize of output 74 [2022-01-19 14:54:07,910 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 47 [2022-01-19 14:54:07,916 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 41 [2022-01-19 14:54:09,688 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-01-19 14:54:09,709 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:54:09,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1590360449] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 14:54:09,709 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 14:54:09,709 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 31, 31] total 83 [2022-01-19 14:54:09,709 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915982023] [2022-01-19 14:54:09,710 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 14:54:09,710 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2022-01-19 14:54:09,710 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:54:09,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2022-01-19 14:54:09,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=508, Invalid=5821, Unknown=3, NotChecked=474, Total=6806 [2022-01-19 14:54:09,713 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 136 [2022-01-19 14:54:09,715 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 605 places, 1197 transitions, 17531 flow. Second operand has 83 states, 83 states have (on average 49.40963855421687) internal successors, (4101), 83 states have internal predecessors, (4101), 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) [2022-01-19 14:54:09,715 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:54:09,715 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 136 [2022-01-19 14:54:09,715 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:54:29,423 INFO L129 PetriNetUnfolder]: 10095/20595 cut-off events. [2022-01-19 14:54:29,423 INFO L130 PetriNetUnfolder]: For 595031/595051 co-relation queries the response was YES. [2022-01-19 14:54:29,647 INFO L84 FinitePrefix]: Finished finitePrefix Result has 157805 conditions, 20595 events. 10095/20595 cut-off events. For 595031/595051 co-relation queries the response was YES. Maximal size of possible extension queue 1108. Compared 201402 event pairs, 858 based on Foata normal form. 152/20678 useless extension candidates. Maximal degree in co-relation 157659. Up to 6099 conditions per place. [2022-01-19 14:54:29,731 INFO L132 encePairwiseOnDemand]: 96/136 looper letters, 974 selfloop transitions, 1039 changer transitions 151/2204 dead transitions. [2022-01-19 14:54:29,732 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 698 places, 2204 transitions, 37256 flow [2022-01-19 14:54:29,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2022-01-19 14:54:29,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2022-01-19 14:54:29,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 6291 transitions. [2022-01-19 14:54:29,737 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.388717251606525 [2022-01-19 14:54:29,737 INFO L72 ComplementDD]: Start complementDD. Operand 119 states and 6291 transitions. [2022-01-19 14:54:29,737 INFO L73 IsDeterministic]: Start isDeterministic. Operand 119 states and 6291 transitions. [2022-01-19 14:54:29,738 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:54:29,738 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 119 states and 6291 transitions. [2022-01-19 14:54:29,743 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 120 states, 119 states have (on average 52.865546218487395) internal successors, (6291), 119 states have internal predecessors, (6291), 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) [2022-01-19 14:54:29,752 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 120 states, 120 states have (on average 136.0) internal successors, (16320), 120 states have internal predecessors, (16320), 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) [2022-01-19 14:54:29,753 INFO L81 ComplementDD]: Finished complementDD. Result has 120 states, 120 states have (on average 136.0) internal successors, (16320), 120 states have internal predecessors, (16320), 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) [2022-01-19 14:54:29,753 INFO L186 Difference]: Start difference. First operand has 605 places, 1197 transitions, 17531 flow. Second operand 119 states and 6291 transitions. [2022-01-19 14:54:29,753 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 698 places, 2204 transitions, 37256 flow [2022-01-19 14:54:33,681 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 633 places, 2204 transitions, 36078 flow, removed 490 selfloop flow, removed 65 redundant places. [2022-01-19 14:54:33,708 INFO L242 Difference]: Finished difference. Result has 688 places, 1618 transitions, 28211 flow [2022-01-19 14:54:33,709 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=16131, PETRI_DIFFERENCE_MINUEND_PLACES=515, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=646, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=421, PETRI_DIFFERENCE_SUBTRAHEND_STATES=119, PETRI_FLOW=28211, PETRI_PLACES=688, PETRI_TRANSITIONS=1618} [2022-01-19 14:54:33,709 INFO L334 CegarLoopForPetriNet]: 121 programPoint places, 567 predicate places. [2022-01-19 14:54:33,709 INFO L470 AbstractCegarLoop]: Abstraction has has 688 places, 1618 transitions, 28211 flow [2022-01-19 14:54:33,710 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 49.40963855421687) internal successors, (4101), 83 states have internal predecessors, (4101), 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) [2022-01-19 14:54:33,710 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:54:33,710 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 14:54:33,727 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-01-19 14:54:33,915 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-01-19 14:54:33,915 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 14:54:33,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:54:33,916 INFO L85 PathProgramCache]: Analyzing trace with hash -810837532, now seen corresponding path program 5 times [2022-01-19 14:54:33,916 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:54:33,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507521232] [2022-01-19 14:54:33,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:54:33,916 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:54:33,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:54:35,068 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:54:35,068 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:54:35,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507521232] [2022-01-19 14:54:35,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507521232] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 14:54:35,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643976102] [2022-01-19 14:54:35,069 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-19 14:54:35,069 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:54:35,069 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 14:54:35,070 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 14:54:35,070 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-01-19 14:54:35,140 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-19 14:54:35,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 14:54:35,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 56 conjunts are in the unsatisfiable core [2022-01-19 14:54:35,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 14:54:36,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-19 14:54:36,256 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-01-19 14:54:36,468 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-19 14:54:36,468 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 23 [2022-01-19 14:54:36,980 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:54:36,980 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 14:54:37,730 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-19 14:54:37,730 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 111 treesize of output 95 [2022-01-19 14:54:37,733 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 49 [2022-01-19 14:54:39,657 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:54:39,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [643976102] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 14:54:39,657 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 14:54:39,657 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 32, 32] total 88 [2022-01-19 14:54:39,657 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973145889] [2022-01-19 14:54:39,657 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 14:54:39,658 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2022-01-19 14:54:39,658 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:54:39,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2022-01-19 14:54:39,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=472, Invalid=7183, Unknown=1, NotChecked=0, Total=7656 [2022-01-19 14:54:39,662 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 136 [2022-01-19 14:54:39,664 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 688 places, 1618 transitions, 28211 flow. Second operand has 88 states, 88 states have (on average 48.35227272727273) internal successors, (4255), 88 states have internal predecessors, (4255), 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) [2022-01-19 14:54:39,664 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:54:39,664 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 136 [2022-01-19 14:54:39,664 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:55:00,979 INFO L129 PetriNetUnfolder]: 11661/23872 cut-off events. [2022-01-19 14:55:00,979 INFO L130 PetriNetUnfolder]: For 920830/920946 co-relation queries the response was YES. [2022-01-19 14:55:01,307 INFO L84 FinitePrefix]: Finished finitePrefix Result has 224510 conditions, 23872 events. 11661/23872 cut-off events. For 920830/920946 co-relation queries the response was YES. Maximal size of possible extension queue 1289. Compared 239302 event pairs, 1872 based on Foata normal form. 16/23822 useless extension candidates. Maximal degree in co-relation 224329. Up to 8625 conditions per place. [2022-01-19 14:55:01,423 INFO L132 encePairwiseOnDemand]: 91/136 looper letters, 658 selfloop transitions, 2012 changer transitions 61/2770 dead transitions. [2022-01-19 14:55:01,423 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 771 places, 2770 transitions, 55700 flow [2022-01-19 14:55:01,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2022-01-19 14:55:01,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2022-01-19 14:55:01,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 5311 transitions. [2022-01-19 14:55:01,427 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.3684100998890122 [2022-01-19 14:55:01,427 INFO L72 ComplementDD]: Start complementDD. Operand 106 states and 5311 transitions. [2022-01-19 14:55:01,427 INFO L73 IsDeterministic]: Start isDeterministic. Operand 106 states and 5311 transitions. [2022-01-19 14:55:01,428 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:55:01,428 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 106 states and 5311 transitions. [2022-01-19 14:55:01,432 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 107 states, 106 states have (on average 50.10377358490566) internal successors, (5311), 106 states have internal predecessors, (5311), 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) [2022-01-19 14:55:01,439 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 107 states, 107 states have (on average 136.0) internal successors, (14552), 107 states have internal predecessors, (14552), 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) [2022-01-19 14:55:01,440 INFO L81 ComplementDD]: Finished complementDD. Result has 107 states, 107 states have (on average 136.0) internal successors, (14552), 107 states have internal predecessors, (14552), 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) [2022-01-19 14:55:01,440 INFO L186 Difference]: Start difference. First operand has 688 places, 1618 transitions, 28211 flow. Second operand 106 states and 5311 transitions. [2022-01-19 14:55:01,440 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 771 places, 2770 transitions, 55700 flow [2022-01-19 14:55:08,611 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 708 places, 2770 transitions, 53593 flow, removed 938 selfloop flow, removed 63 redundant places. [2022-01-19 14:55:08,652 INFO L242 Difference]: Finished difference. Result has 735 places, 2553 transitions, 53641 flow [2022-01-19 14:55:08,653 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=26944, PETRI_DIFFERENCE_MINUEND_PLACES=603, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1618, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=318, PETRI_DIFFERENCE_SUBTRAHEND_STATES=106, PETRI_FLOW=53641, PETRI_PLACES=735, PETRI_TRANSITIONS=2553} [2022-01-19 14:55:08,653 INFO L334 CegarLoopForPetriNet]: 121 programPoint places, 614 predicate places. [2022-01-19 14:55:08,653 INFO L470 AbstractCegarLoop]: Abstraction has has 735 places, 2553 transitions, 53641 flow [2022-01-19 14:55:08,654 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 88 states have (on average 48.35227272727273) internal successors, (4255), 88 states have internal predecessors, (4255), 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) [2022-01-19 14:55:08,654 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:55:08,654 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 14:55:08,669 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-01-19 14:55:08,867 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-01-19 14:55:08,867 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 14:55:08,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:55:08,868 INFO L85 PathProgramCache]: Analyzing trace with hash -2002121420, now seen corresponding path program 6 times [2022-01-19 14:55:08,868 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:55:08,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052976404] [2022-01-19 14:55:08,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:55:08,868 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:55:08,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:55:09,653 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:55:09,653 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:55:09,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052976404] [2022-01-19 14:55:09,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052976404] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 14:55:09,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612645166] [2022-01-19 14:55:09,653 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-19 14:55:09,653 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:55:09,653 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 14:55:09,654 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 14:55:09,655 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-01-19 14:55:09,724 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-19 14:55:09,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 14:55:09,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 57 conjunts are in the unsatisfiable core [2022-01-19 14:55:09,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 14:55:10,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-19 14:55:10,929 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-01-19 14:55:11,082 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-01-19 14:55:11,398 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:55:11,399 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 14:55:11,815 WARN L838 $PredicateComparison]: unable to prove that (or (not (<= 0 c_~q_back~0)) (not (< c_~q_back~0 c_~n~0)) (< (+ |c_thread1Thread1of1ForFork1_#t~post1#1| 1) c_~N~0) (and (forall ((v_ArrVal_326 (Array Int Int))) (<= c_~N~0 (+ c_~s~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_326) c_~q~0.base) (+ (* c_~q_front~0 4) c_~q~0.offset))))) (forall ((v_ArrVal_326 (Array Int Int))) (<= (+ c_~s~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_326) c_~q~0.base) (+ (* c_~q_front~0 4) c_~q~0.offset))) c_~N~0)))) is different from false [2022-01-19 14:55:11,828 WARN L838 $PredicateComparison]: unable to prove that (or (not (<= 0 c_~q_back~0)) (not (< c_~q_back~0 c_~n~0)) (< (+ |c_thread1Thread1of1ForFork1_~i~0#1| 1) c_~N~0) (and (forall ((v_ArrVal_326 (Array Int Int))) (<= c_~N~0 (+ c_~s~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_326) c_~q~0.base) (+ (* c_~q_front~0 4) c_~q~0.offset))))) (forall ((v_ArrVal_326 (Array Int Int))) (<= (+ c_~s~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_326) c_~q~0.base) (+ (* c_~q_front~0 4) c_~q~0.offset))) c_~N~0)))) is different from false [2022-01-19 14:55:11,882 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-19 14:55:11,883 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 82 treesize of output 74 [2022-01-19 14:55:11,891 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 47 [2022-01-19 14:55:11,896 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 41 [2022-01-19 14:55:13,437 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:55:13,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1612645166] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 14:55:13,437 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 14:55:13,437 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 31, 31] total 84 [2022-01-19 14:55:13,438 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780403488] [2022-01-19 14:55:13,438 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 14:55:13,438 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2022-01-19 14:55:13,438 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:55:13,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2022-01-19 14:55:13,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=520, Invalid=6128, Unknown=2, NotChecked=322, Total=6972 [2022-01-19 14:55:13,441 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 136 [2022-01-19 14:55:13,442 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 735 places, 2553 transitions, 53641 flow. Second operand has 84 states, 84 states have (on average 48.464285714285715) internal successors, (4071), 84 states have internal predecessors, (4071), 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) [2022-01-19 14:55:13,443 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:55:13,443 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 136 [2022-01-19 14:55:13,443 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:55:20,892 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse14 (* c_~q_front~0 4))) (let ((.cse15 (+ c_~s~0 1)) (.cse18 (+ c_~N~0 |c_thread2Thread1of1ForFork0_~j~0#1|)) (.cse19 (* 4 c_~q_back~0)) (.cse16 (+ |c_thread1Thread1of1ForFork1_~i~0#1| 1)) (.cse13 (+ .cse14 c_~q~0.offset))) (let ((.cse2 (<= 0 c_~q_front~0)) (.cse7 (= (select (select |c_#memory_int| c_~q~0.base) .cse13) 1)) (.cse4 (not (= |c_ULTIMATE.start_main_~#t2~0#1.base| c_~q~0.base))) (.cse10 (<= .cse16 c_~N~0)) (.cse11 (= |c_thread1Thread1of1ForFork1_~i~0#1| 0)) (.cse1 (<= .cse13 0)) (.cse3 (<= 1 c_~N~0)) (.cse5 (= c_~s~0 0)) (.cse6 (= |c_thread1Thread1of1ForFork1_#t~post1#1| 0)) (.cse12 (+ c_~q~0.offset .cse19)) (.cse17 (<= c_~n~0 2)) (.cse8 (<= .cse15 .cse18)) (.cse9 (= |c_thread2Thread1of1ForFork0_~j~0#1| 1)) (.cse0 (<= (* c_~n~0 4) (+ c_~q~0.offset 3 .cse19)))) (and (<= |c_thread1Thread1of1ForFork1_~i~0#1| 1) (or .cse0 (and .cse1 .cse2 .cse3 .cse4 .cse5 .cse6 .cse7)) (or .cse0 (and (<= |c_thread2Thread1of1ForFork0_~j~0#1| c_~s~0) .cse8 .cse9 .cse6)) (or (and .cse1 .cse2 .cse4 .cse5 .cse10 .cse11 .cse7) .cse0) (= c_~s~0 1) (or (not (= .cse12 0)) (and (or (and .cse4 .cse5 .cse10 .cse11) (not (= .cse13 0))) (or .cse1 (<= (+ c_~q_front~0 c_~n~0) (+ 2 c_~q_back~0))) (< 0 (+ .cse14 c_~q~0.offset 1)))) (or (not (= |c_thread2Thread1of1ForFork0_~j~0#1| 0)) (and (<= c_~N~0 c_~s~0) (<= c_~s~0 c_~N~0))) (or (and .cse3 .cse5 .cse9 .cse6) .cse0) (or (and (<= (+ |c_thread1Thread1of1ForFork1_~i~0#1| |c_thread2Thread1of1ForFork0_~j~0#1|) .cse15) .cse8 .cse9) .cse0) (or (not (<= 0 c_~q_back~0)) (not (< c_~q_back~0 c_~n~0)) (< .cse16 c_~N~0) (and (forall ((v_ArrVal_326 (Array Int Int))) (<= c_~N~0 (+ c_~s~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_326) c_~q~0.base) (+ (* c_~q_front~0 4) c_~q~0.offset))))) (forall ((v_ArrVal_326 (Array Int Int))) (<= (+ c_~s~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_326) c_~q~0.base) (+ (* c_~q_front~0 4) c_~q~0.offset))) c_~N~0)))) (or (<= .cse12 0) .cse17) (< 0 c_~N~0) (< 0 c_~n~0) (= c_~q~0.offset 0) (<= 1 c_~q_back~0) .cse17 (or (and .cse8 .cse9 (<= .cse18 .cse15)) .cse0))))) is different from false [2022-01-19 14:55:44,036 INFO L129 PetriNetUnfolder]: 15449/31226 cut-off events. [2022-01-19 14:55:44,036 INFO L130 PetriNetUnfolder]: For 1602386/1602516 co-relation queries the response was YES. [2022-01-19 14:55:44,655 INFO L84 FinitePrefix]: Finished finitePrefix Result has 343026 conditions, 31226 events. 15449/31226 cut-off events. For 1602386/1602516 co-relation queries the response was YES. Maximal size of possible extension queue 1565. Compared 323165 event pairs, 704 based on Foata normal form. 55/31209 useless extension candidates. Maximal degree in co-relation 342834. Up to 6811 conditions per place. [2022-01-19 14:55:44,991 INFO L132 encePairwiseOnDemand]: 96/136 looper letters, 1244 selfloop transitions, 2649 changer transitions 175/4107 dead transitions. [2022-01-19 14:55:44,992 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 862 places, 4107 transitions, 96969 flow [2022-01-19 14:55:44,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 142 states. [2022-01-19 14:55:44,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2022-01-19 14:55:45,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 7259 transitions. [2022-01-19 14:55:45,014 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.37588028169014087 [2022-01-19 14:55:45,015 INFO L72 ComplementDD]: Start complementDD. Operand 142 states and 7259 transitions. [2022-01-19 14:55:45,015 INFO L73 IsDeterministic]: Start isDeterministic. Operand 142 states and 7259 transitions. [2022-01-19 14:55:45,016 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:55:45,016 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 142 states and 7259 transitions. [2022-01-19 14:55:45,023 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 143 states, 142 states have (on average 51.11971830985915) internal successors, (7259), 142 states have internal predecessors, (7259), 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) [2022-01-19 14:55:45,034 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 143 states, 143 states have (on average 136.0) internal successors, (19448), 143 states have internal predecessors, (19448), 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) [2022-01-19 14:55:45,035 INFO L81 ComplementDD]: Finished complementDD. Result has 143 states, 143 states have (on average 136.0) internal successors, (19448), 143 states have internal predecessors, (19448), 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) [2022-01-19 14:55:45,035 INFO L186 Difference]: Start difference. First operand has 735 places, 2553 transitions, 53641 flow. Second operand 142 states and 7259 transitions. [2022-01-19 14:55:45,035 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 862 places, 4107 transitions, 96969 flow [2022-01-19 14:56:04,776 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 828 places, 4107 transitions, 94227 flow, removed 1290 selfloop flow, removed 34 redundant places. [2022-01-19 14:56:04,854 INFO L242 Difference]: Finished difference. Result has 881 places, 3456 transitions, 82613 flow [2022-01-19 14:56:04,856 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=52113, PETRI_DIFFERENCE_MINUEND_PLACES=687, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2553, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1796, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=564, PETRI_DIFFERENCE_SUBTRAHEND_STATES=142, PETRI_FLOW=82613, PETRI_PLACES=881, PETRI_TRANSITIONS=3456} [2022-01-19 14:56:04,856 INFO L334 CegarLoopForPetriNet]: 121 programPoint places, 760 predicate places. [2022-01-19 14:56:04,856 INFO L470 AbstractCegarLoop]: Abstraction has has 881 places, 3456 transitions, 82613 flow [2022-01-19 14:56:04,857 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 48.464285714285715) internal successors, (4071), 84 states have internal predecessors, (4071), 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) [2022-01-19 14:56:04,857 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:56:04,857 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 14:56:04,872 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-01-19 14:56:05,057 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-01-19 14:56:05,057 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 14:56:05,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:56:05,058 INFO L85 PathProgramCache]: Analyzing trace with hash -859918472, now seen corresponding path program 7 times [2022-01-19 14:56:05,058 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:56:05,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258401028] [2022-01-19 14:56:05,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:56:05,058 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:56:05,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:56:06,259 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:56:06,259 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:56:06,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258401028] [2022-01-19 14:56:06,260 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258401028] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 14:56:06,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331914666] [2022-01-19 14:56:06,260 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-19 14:56:06,260 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:56:06,260 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 14:56:06,261 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 14:56:06,261 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-01-19 14:56:06,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:56:06,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 64 conjunts are in the unsatisfiable core [2022-01-19 14:56:06,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 14:56:06,352 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 [2022-01-19 14:56:06,596 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-01-19 14:56:06,596 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-01-19 14:56:07,753 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-01-19 14:56:07,956 INFO L353 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2022-01-19 14:56:07,956 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 10 [2022-01-19 14:56:08,280 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:56:08,280 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 14:56:08,973 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-19 14:56:08,973 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 111 treesize of output 95 [2022-01-19 14:56:08,977 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 49 [2022-01-19 14:56:10,827 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-01-19 14:56:10,847 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:56:10,848 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [331914666] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 14:56:10,848 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 14:56:10,848 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 32, 32] total 88 [2022-01-19 14:56:10,848 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084622610] [2022-01-19 14:56:10,849 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 14:56:10,849 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2022-01-19 14:56:10,849 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:56:10,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2022-01-19 14:56:10,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=575, Invalid=7075, Unknown=6, NotChecked=0, Total=7656 [2022-01-19 14:56:10,853 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 136 [2022-01-19 14:56:10,855 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 881 places, 3456 transitions, 82613 flow. Second operand has 88 states, 88 states have (on average 49.28409090909091) internal successors, (4337), 88 states have internal predecessors, (4337), 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) [2022-01-19 14:56:10,855 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:56:10,855 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 136 [2022-01-19 14:56:10,855 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:56:48,769 INFO L129 PetriNetUnfolder]: 17043/34495 cut-off events. [2022-01-19 14:56:48,769 INFO L130 PetriNetUnfolder]: For 2074350/2074477 co-relation queries the response was YES. [2022-01-19 14:56:49,865 INFO L84 FinitePrefix]: Finished finitePrefix Result has 404859 conditions, 34495 events. 17043/34495 cut-off events. For 2074350/2074477 co-relation queries the response was YES. Maximal size of possible extension queue 1792. Compared 363321 event pairs, 1640 based on Foata normal form. 26/34387 useless extension candidates. Maximal degree in co-relation 404621. Up to 16099 conditions per place. [2022-01-19 14:56:50,127 INFO L132 encePairwiseOnDemand]: 92/136 looper letters, 1835 selfloop transitions, 2566 changer transitions 56/4497 dead transitions. [2022-01-19 14:56:50,127 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 948 places, 4497 transitions, 118091 flow [2022-01-19 14:56:50,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-01-19 14:56:50,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2022-01-19 14:56:50,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 4579 transitions. [2022-01-19 14:56:50,132 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.3783046926635823 [2022-01-19 14:56:50,132 INFO L72 ComplementDD]: Start complementDD. Operand 89 states and 4579 transitions. [2022-01-19 14:56:50,132 INFO L73 IsDeterministic]: Start isDeterministic. Operand 89 states and 4579 transitions. [2022-01-19 14:56:50,133 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:56:50,133 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 89 states and 4579 transitions. [2022-01-19 14:56:50,266 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 90 states, 89 states have (on average 51.449438202247194) internal successors, (4579), 89 states have internal predecessors, (4579), 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) [2022-01-19 14:56:50,271 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 90 states, 90 states have (on average 136.0) internal successors, (12240), 90 states have internal predecessors, (12240), 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) [2022-01-19 14:56:50,272 INFO L81 ComplementDD]: Finished complementDD. Result has 90 states, 90 states have (on average 136.0) internal successors, (12240), 90 states have internal predecessors, (12240), 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) [2022-01-19 14:56:50,272 INFO L186 Difference]: Start difference. First operand has 881 places, 3456 transitions, 82613 flow. Second operand 89 states and 4579 transitions. [2022-01-19 14:56:50,272 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 948 places, 4497 transitions, 118091 flow [2022-01-19 14:57:18,287 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 881 places, 4497 transitions, 116189 flow, removed 805 selfloop flow, removed 67 redundant places. [2022-01-19 14:57:18,371 INFO L242 Difference]: Finished difference. Result has 911 places, 4197 transitions, 112383 flow [2022-01-19 14:57:18,373 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=81364, PETRI_DIFFERENCE_MINUEND_PLACES=793, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3456, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1839, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1275, PETRI_DIFFERENCE_SUBTRAHEND_STATES=89, PETRI_FLOW=112383, PETRI_PLACES=911, PETRI_TRANSITIONS=4197} [2022-01-19 14:57:18,374 INFO L334 CegarLoopForPetriNet]: 121 programPoint places, 790 predicate places. [2022-01-19 14:57:18,374 INFO L470 AbstractCegarLoop]: Abstraction has has 911 places, 4197 transitions, 112383 flow [2022-01-19 14:57:18,375 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 88 states have (on average 49.28409090909091) internal successors, (4337), 88 states have internal predecessors, (4337), 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) [2022-01-19 14:57:18,375 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:57:18,375 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 14:57:18,392 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-01-19 14:57:18,581 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-01-19 14:57:18,582 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 14:57:18,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:57:18,582 INFO L85 PathProgramCache]: Analyzing trace with hash 288974610, now seen corresponding path program 8 times [2022-01-19 14:57:18,582 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:57:18,582 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213178244] [2022-01-19 14:57:18,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:57:18,583 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:57:18,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:57:19,507 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:57:19,508 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:57:19,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213178244] [2022-01-19 14:57:19,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213178244] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 14:57:19,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [280452050] [2022-01-19 14:57:19,508 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-19 14:57:19,508 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:57:19,508 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 14:57:19,509 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 14:57:19,509 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-01-19 14:57:19,578 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-19 14:57:19,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 14:57:19,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 68 conjunts are in the unsatisfiable core [2022-01-19 14:57:19,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 14:57:20,105 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-01-19 14:57:20,265 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-01-19 14:57:20,690 INFO L387 Elim1Store]: Elim1 did not use preprocessing 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 [2022-01-19 14:57:21,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-19 14:57:21,057 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-01-19 14:57:21,223 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-01-19 14:57:21,584 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:57:21,584 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 14:57:24,990 INFO L353 Elim1Store]: treesize reduction 28, result has 54.8 percent of original size [2022-01-19 14:57:24,990 INFO L387 Elim1Store]: Elim1 did not use preprocessing 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 2 case distinctions, treesize of input 148 treesize of output 105 [2022-01-19 14:57:25,008 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-19 14:57:25,009 INFO L387 Elim1Store]: Elim1 did not use preprocessing 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 524 treesize of output 508 [2022-01-19 14:57:25,026 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-19 14:57:25,027 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 383 treesize of output 357 [2022-01-19 14:57:25,036 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 387 treesize of output 315 [2022-01-19 14:57:27,261 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:57:27,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [280452050] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 14:57:27,261 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 14:57:27,262 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 34, 35] total 91 [2022-01-19 14:57:27,262 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16052111] [2022-01-19 14:57:27,262 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 14:57:27,262 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2022-01-19 14:57:27,262 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:57:27,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2022-01-19 14:57:27,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=649, Invalid=7458, Unknown=83, NotChecked=0, Total=8190 [2022-01-19 14:57:27,266 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 136 [2022-01-19 14:57:27,268 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 911 places, 4197 transitions, 112383 flow. Second operand has 91 states, 91 states have (on average 47.26373626373626) internal successors, (4301), 91 states have internal predecessors, (4301), 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) [2022-01-19 14:57:27,268 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:57:27,268 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 136 [2022-01-19 14:57:27,268 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 14:58:20,895 INFO L129 PetriNetUnfolder]: 17824/36115 cut-off events. [2022-01-19 14:58:20,896 INFO L130 PetriNetUnfolder]: For 2797867/2798049 co-relation queries the response was YES. [2022-01-19 14:58:22,109 INFO L84 FinitePrefix]: Finished finitePrefix Result has 468295 conditions, 36115 events. 17824/36115 cut-off events. For 2797867/2798049 co-relation queries the response was YES. Maximal size of possible extension queue 1877. Compared 383423 event pairs, 533 based on Foata normal form. 44/36074 useless extension candidates. Maximal degree in co-relation 468049. Up to 8139 conditions per place. [2022-01-19 14:58:22,456 INFO L132 encePairwiseOnDemand]: 94/136 looper letters, 1050 selfloop transitions, 3971 changer transitions 81/5141 dead transitions. [2022-01-19 14:58:22,456 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1006 places, 5141 transitions, 146872 flow [2022-01-19 14:58:22,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2022-01-19 14:58:22,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2022-01-19 14:58:22,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 5406 transitions. [2022-01-19 14:58:22,460 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.3646788990825688 [2022-01-19 14:58:22,460 INFO L72 ComplementDD]: Start complementDD. Operand 109 states and 5406 transitions. [2022-01-19 14:58:22,460 INFO L73 IsDeterministic]: Start isDeterministic. Operand 109 states and 5406 transitions. [2022-01-19 14:58:22,461 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 14:58:22,461 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 109 states and 5406 transitions. [2022-01-19 14:58:22,465 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 110 states, 109 states have (on average 49.596330275229356) internal successors, (5406), 109 states have internal predecessors, (5406), 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) [2022-01-19 14:58:22,472 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 110 states, 110 states have (on average 136.0) internal successors, (14960), 110 states have internal predecessors, (14960), 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) [2022-01-19 14:58:22,473 INFO L81 ComplementDD]: Finished complementDD. Result has 110 states, 110 states have (on average 136.0) internal successors, (14960), 110 states have internal predecessors, (14960), 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) [2022-01-19 14:58:22,473 INFO L186 Difference]: Start difference. First operand has 911 places, 4197 transitions, 112383 flow. Second operand 109 states and 5406 transitions. [2022-01-19 14:58:22,473 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1006 places, 5141 transitions, 146872 flow [2022-01-19 14:59:09,459 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 950 places, 5141 transitions, 144852 flow, removed 911 selfloop flow, removed 56 redundant places. [2022-01-19 14:59:09,566 INFO L242 Difference]: Finished difference. Result has 981 places, 4841 transitions, 143398 flow [2022-01-19 14:59:09,569 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=111157, PETRI_DIFFERENCE_MINUEND_PLACES=842, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3328, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=693, PETRI_DIFFERENCE_SUBTRAHEND_STATES=109, PETRI_FLOW=143398, PETRI_PLACES=981, PETRI_TRANSITIONS=4841} [2022-01-19 14:59:09,570 INFO L334 CegarLoopForPetriNet]: 121 programPoint places, 860 predicate places. [2022-01-19 14:59:09,570 INFO L470 AbstractCegarLoop]: Abstraction has has 981 places, 4841 transitions, 143398 flow [2022-01-19 14:59:09,571 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 91 states have (on average 47.26373626373626) internal successors, (4301), 91 states have internal predecessors, (4301), 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) [2022-01-19 14:59:09,571 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 14:59:09,571 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 14:59:09,587 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-01-19 14:59:09,771 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-01-19 14:59:09,771 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 14:59:09,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 14:59:09,772 INFO L85 PathProgramCache]: Analyzing trace with hash 1092412622, now seen corresponding path program 9 times [2022-01-19 14:59:09,772 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 14:59:09,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478029853] [2022-01-19 14:59:09,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 14:59:09,772 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 14:59:09,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 14:59:10,919 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 14:59:10,919 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 14:59:10,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478029853] [2022-01-19 14:59:10,919 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478029853] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 14:59:10,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193243375] [2022-01-19 14:59:10,919 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-19 14:59:10,919 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 14:59:10,920 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 14:59:10,921 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 14:59:10,921 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-01-19 14:59:10,992 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-19 14:59:10,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 14:59:10,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 43 conjunts are in the unsatisfiable core [2022-01-19 14:59:11,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 14:59:11,027 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 [2022-01-19 14:59:11,190 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-01-19 14:59:11,191 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-01-19 14:59:11,681 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-01-19 14:59:11,764 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-01-19 14:59:12,081 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-19 14:59:12,081 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 14:59:12,640 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-19 14:59:12,640 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 111 treesize of output 95 [2022-01-19 14:59:12,643 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 49 [2022-01-19 14:59:13,415 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-01-19 14:59:13,434 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-19 14:59:13,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [193243375] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 14:59:13,434 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 14:59:13,434 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 23, 23] total 66 [2022-01-19 14:59:13,434 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623552273] [2022-01-19 14:59:13,434 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 14:59:13,434 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-01-19 14:59:13,434 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 14:59:13,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-01-19 14:59:13,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=223, Invalid=4064, Unknown=3, NotChecked=0, Total=4290 [2022-01-19 14:59:13,436 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 136 [2022-01-19 14:59:13,437 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 981 places, 4841 transitions, 143398 flow. Second operand has 66 states, 66 states have (on average 47.68181818181818) internal successors, (3147), 66 states have internal predecessors, (3147), 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) [2022-01-19 14:59:13,437 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 14:59:13,437 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 136 [2022-01-19 14:59:13,438 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 15:00:11,642 INFO L129 PetriNetUnfolder]: 18955/38157 cut-off events. [2022-01-19 15:00:11,643 INFO L130 PetriNetUnfolder]: For 3716994/3717176 co-relation queries the response was YES. [2022-01-19 15:00:13,028 INFO L84 FinitePrefix]: Finished finitePrefix Result has 550723 conditions, 38157 events. 18955/38157 cut-off events. For 3716994/3717176 co-relation queries the response was YES. Maximal size of possible extension queue 2011. Compared 404743 event pairs, 777 based on Foata normal form. 49/38083 useless extension candidates. Maximal degree in co-relation 550461. Up to 12904 conditions per place. [2022-01-19 15:00:13,307 INFO L132 encePairwiseOnDemand]: 98/136 looper letters, 2169 selfloop transitions, 3405 changer transitions 97/5710 dead transitions. [2022-01-19 15:00:13,307 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1058 places, 5710 transitions, 179802 flow [2022-01-19 15:00:13,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-01-19 15:00:13,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2022-01-19 15:00:13,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 4598 transitions. [2022-01-19 15:00:13,311 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.3635357368753953 [2022-01-19 15:00:13,311 INFO L72 ComplementDD]: Start complementDD. Operand 93 states and 4598 transitions. [2022-01-19 15:00:13,311 INFO L73 IsDeterministic]: Start isDeterministic. Operand 93 states and 4598 transitions. [2022-01-19 15:00:13,312 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 15:00:13,312 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 93 states and 4598 transitions. [2022-01-19 15:00:13,315 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 94 states, 93 states have (on average 49.44086021505376) internal successors, (4598), 93 states have internal predecessors, (4598), 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) [2022-01-19 15:00:13,321 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 94 states, 94 states have (on average 136.0) internal successors, (12784), 94 states have internal predecessors, (12784), 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) [2022-01-19 15:00:13,321 INFO L81 ComplementDD]: Finished complementDD. Result has 94 states, 94 states have (on average 136.0) internal successors, (12784), 94 states have internal predecessors, (12784), 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) [2022-01-19 15:00:13,321 INFO L186 Difference]: Start difference. First operand has 981 places, 4841 transitions, 143398 flow. Second operand 93 states and 4598 transitions. [2022-01-19 15:00:13,321 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1058 places, 5710 transitions, 179802 flow [2022-01-19 15:01:20,467 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1005 places, 5710 transitions, 176652 flow, removed 1450 selfloop flow, removed 53 redundant places. [2022-01-19 15:01:20,593 INFO L242 Difference]: Finished difference. Result has 1024 places, 5264 transitions, 165280 flow [2022-01-19 15:01:20,596 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=141297, PETRI_DIFFERENCE_MINUEND_PLACES=913, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4841, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2974, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1791, PETRI_DIFFERENCE_SUBTRAHEND_STATES=93, PETRI_FLOW=165280, PETRI_PLACES=1024, PETRI_TRANSITIONS=5264} [2022-01-19 15:01:20,597 INFO L334 CegarLoopForPetriNet]: 121 programPoint places, 903 predicate places. [2022-01-19 15:01:20,597 INFO L470 AbstractCegarLoop]: Abstraction has has 1024 places, 5264 transitions, 165280 flow [2022-01-19 15:01:20,597 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 47.68181818181818) internal successors, (3147), 66 states have internal predecessors, (3147), 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) [2022-01-19 15:01:20,597 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 15:01:20,597 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 15:01:20,614 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-01-19 15:01:20,803 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-01-19 15:01:20,803 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 15:01:20,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 15:01:20,804 INFO L85 PathProgramCache]: Analyzing trace with hash 232497836, now seen corresponding path program 10 times [2022-01-19 15:01:20,804 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 15:01:20,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302608706] [2022-01-19 15:01:20,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 15:01:20,804 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 15:01:20,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 15:01:21,644 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 15:01:21,644 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 15:01:21,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302608706] [2022-01-19 15:01:21,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302608706] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 15:01:21,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275887822] [2022-01-19 15:01:21,644 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-19 15:01:21,644 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 15:01:21,644 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 15:01:21,645 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 15:01:21,646 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-01-19 15:01:21,714 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-19 15:01:21,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 15:01:21,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 63 conjunts are in the unsatisfiable core [2022-01-19 15:01:21,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 15:01:21,746 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 [2022-01-19 15:01:21,936 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-01-19 15:01:21,936 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-01-19 15:01:22,783 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2022-01-19 15:01:22,949 INFO L353 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2022-01-19 15:01:22,949 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 10 [2022-01-19 15:01:23,320 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 15:01:23,320 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 15:01:23,920 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-19 15:01:23,920 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 111 treesize of output 95 [2022-01-19 15:01:23,923 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 49 [2022-01-19 15:01:25,832 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-01-19 15:01:25,859 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 15:01:25,860 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1275887822] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 15:01:25,860 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 15:01:25,860 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32, 32] total 82 [2022-01-19 15:01:25,860 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18023711] [2022-01-19 15:01:25,860 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 15:01:25,860 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2022-01-19 15:01:25,860 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 15:01:25,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2022-01-19 15:01:25,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=581, Invalid=6058, Unknown=3, NotChecked=0, Total=6642 [2022-01-19 15:01:25,863 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 136 [2022-01-19 15:01:25,865 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1024 places, 5264 transitions, 165280 flow. Second operand has 82 states, 82 states have (on average 49.28048780487805) internal successors, (4041), 82 states have internal predecessors, (4041), 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) [2022-01-19 15:01:25,865 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 15:01:25,865 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 136 [2022-01-19 15:01:25,865 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 15:02:33,742 INFO L129 PetriNetUnfolder]: 20375/41324 cut-off events. [2022-01-19 15:02:33,743 INFO L130 PetriNetUnfolder]: For 3730717/3730916 co-relation queries the response was YES. [2022-01-19 15:02:35,439 INFO L84 FinitePrefix]: Finished finitePrefix Result has 583289 conditions, 41324 events. 20375/41324 cut-off events. For 3730717/3730916 co-relation queries the response was YES. Maximal size of possible extension queue 2113. Compared 444511 event pairs, 2318 based on Foata normal form. 44/41209 useless extension candidates. Maximal degree in co-relation 583021. Up to 24157 conditions per place. [2022-01-19 15:02:35,735 INFO L132 encePairwiseOnDemand]: 94/136 looper letters, 3444 selfloop transitions, 2771 changer transitions 59/6314 dead transitions. [2022-01-19 15:02:35,735 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1104 places, 6314 transitions, 211320 flow [2022-01-19 15:02:35,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2022-01-19 15:02:35,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2022-01-19 15:02:35,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 5345 transitions. [2022-01-19 15:02:35,739 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.3778987556561086 [2022-01-19 15:02:35,739 INFO L72 ComplementDD]: Start complementDD. Operand 104 states and 5345 transitions. [2022-01-19 15:02:35,739 INFO L73 IsDeterministic]: Start isDeterministic. Operand 104 states and 5345 transitions. [2022-01-19 15:02:35,739 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 15:02:35,739 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 104 states and 5345 transitions. [2022-01-19 15:02:35,744 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 105 states, 104 states have (on average 51.39423076923077) internal successors, (5345), 104 states have internal predecessors, (5345), 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) [2022-01-19 15:02:35,750 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 105 states, 105 states have (on average 136.0) internal successors, (14280), 105 states have internal predecessors, (14280), 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) [2022-01-19 15:02:35,751 INFO L81 ComplementDD]: Finished complementDD. Result has 105 states, 105 states have (on average 136.0) internal successors, (14280), 105 states have internal predecessors, (14280), 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) [2022-01-19 15:02:35,751 INFO L186 Difference]: Start difference. First operand has 1024 places, 5264 transitions, 165280 flow. Second operand 104 states and 5345 transitions. [2022-01-19 15:02:35,751 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1104 places, 6314 transitions, 211320 flow [2022-01-19 15:03:43,273 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1051 places, 6314 transitions, 210480 flow, removed 295 selfloop flow, removed 53 redundant places. [2022-01-19 15:03:43,421 INFO L242 Difference]: Finished difference. Result has 1084 places, 5987 transitions, 201609 flow [2022-01-19 15:03:43,425 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=164530, PETRI_DIFFERENCE_MINUEND_PLACES=948, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=5264, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2074, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2596, PETRI_DIFFERENCE_SUBTRAHEND_STATES=104, PETRI_FLOW=201609, PETRI_PLACES=1084, PETRI_TRANSITIONS=5987} [2022-01-19 15:03:43,425 INFO L334 CegarLoopForPetriNet]: 121 programPoint places, 963 predicate places. [2022-01-19 15:03:43,425 INFO L470 AbstractCegarLoop]: Abstraction has has 1084 places, 5987 transitions, 201609 flow [2022-01-19 15:03:43,426 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 49.28048780487805) internal successors, (4041), 82 states have internal predecessors, (4041), 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) [2022-01-19 15:03:43,426 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 15:03:43,426 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 15:03:43,442 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-01-19 15:03:43,635 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 15:03:43,635 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 15:03:43,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 15:03:43,636 INFO L85 PathProgramCache]: Analyzing trace with hash 744266758, now seen corresponding path program 11 times [2022-01-19 15:03:43,636 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 15:03:43,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378031050] [2022-01-19 15:03:43,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 15:03:43,636 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 15:03:43,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 15:03:44,423 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 15:03:44,423 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 15:03:44,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378031050] [2022-01-19 15:03:44,423 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378031050] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 15:03:44,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1293406757] [2022-01-19 15:03:44,424 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-19 15:03:44,424 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 15:03:44,424 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 15:03:44,425 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 15:03:44,425 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-01-19 15:03:44,497 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-19 15:03:44,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 15:03:44,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 50 conjunts are in the unsatisfiable core [2022-01-19 15:03:44,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 15:03:44,536 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 [2022-01-19 15:03:44,675 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-01-19 15:03:44,675 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-01-19 15:03:45,169 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-01-19 15:03:45,315 INFO L353 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2022-01-19 15:03:45,315 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 10 [2022-01-19 15:03:45,641 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-19 15:03:45,641 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 15:03:46,161 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-19 15:03:46,162 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 111 treesize of output 95 [2022-01-19 15:03:46,165 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 49 [2022-01-19 15:03:47,426 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-01-19 15:03:47,446 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-19 15:03:47,446 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1293406757] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 15:03:47,446 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 15:03:47,446 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 23, 23] total 67 [2022-01-19 15:03:47,446 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023018721] [2022-01-19 15:03:47,446 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 15:03:47,446 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-01-19 15:03:47,446 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 15:03:47,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-01-19 15:03:47,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=332, Invalid=4089, Unknown=1, NotChecked=0, Total=4422 [2022-01-19 15:03:47,448 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 136 [2022-01-19 15:03:47,450 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1084 places, 5987 transitions, 201609 flow. Second operand has 67 states, 67 states have (on average 49.865671641791046) internal successors, (3341), 67 states have internal predecessors, (3341), 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) [2022-01-19 15:03:47,450 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 15:03:47,450 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 136 [2022-01-19 15:03:47,450 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 15:05:07,932 INFO L129 PetriNetUnfolder]: 21832/44236 cut-off events. [2022-01-19 15:05:07,933 INFO L130 PetriNetUnfolder]: For 4490522/4490812 co-relation queries the response was YES. [2022-01-19 15:05:10,694 INFO L84 FinitePrefix]: Finished finitePrefix Result has 660517 conditions, 44236 events. 21832/44236 cut-off events. For 4490522/4490812 co-relation queries the response was YES. Maximal size of possible extension queue 2233. Compared 477104 event pairs, 2792 based on Foata normal form. 105/44196 useless extension candidates. Maximal degree in co-relation 660225. Up to 20795 conditions per place. [2022-01-19 15:05:11,117 INFO L132 encePairwiseOnDemand]: 98/136 looper letters, 3119 selfloop transitions, 4024 changer transitions 82/7265 dead transitions. [2022-01-19 15:05:11,117 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1132 places, 7265 transitions, 258704 flow [2022-01-19 15:05:11,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-01-19 15:05:11,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2022-01-19 15:05:11,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 3141 transitions. [2022-01-19 15:05:11,120 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.3786162005785921 [2022-01-19 15:05:11,120 INFO L72 ComplementDD]: Start complementDD. Operand 61 states and 3141 transitions. [2022-01-19 15:05:11,120 INFO L73 IsDeterministic]: Start isDeterministic. Operand 61 states and 3141 transitions. [2022-01-19 15:05:11,120 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 15:05:11,120 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 61 states and 3141 transitions. [2022-01-19 15:05:11,122 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 62 states, 61 states have (on average 51.49180327868852) internal successors, (3141), 61 states have internal predecessors, (3141), 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) [2022-01-19 15:05:11,126 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 62 states, 62 states have (on average 136.0) internal successors, (8432), 62 states have internal predecessors, (8432), 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) [2022-01-19 15:05:11,126 INFO L81 ComplementDD]: Finished complementDD. Result has 62 states, 62 states have (on average 136.0) internal successors, (8432), 62 states have internal predecessors, (8432), 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) [2022-01-19 15:05:11,126 INFO L186 Difference]: Start difference. First operand has 1084 places, 5987 transitions, 201609 flow. Second operand 61 states and 3141 transitions. [2022-01-19 15:05:11,126 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1132 places, 7265 transitions, 258704 flow Received shutdown request... [2022-01-19 15:05:42,397 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-01-19 15:05:42,398 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 [2022-01-19 15:05:42,444 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2022-01-19 15:05:42,459 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-01-19 15:05:42,644 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 15:05:42,645 WARN L594 AbstractCegarLoop]: Verification canceled: while executing RemoveRedundantFlow. [2022-01-19 15:05:42,646 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION (1 of 3 remaining) [2022-01-19 15:05:42,646 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION (0 of 3 remaining) [2022-01-19 15:05:42,648 INFO L732 BasicCegarLoop]: Path program histogram: [11, 3, 2, 1, 1, 1] [2022-01-19 15:05:42,649 INFO L230 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-01-19 15:05:42,649 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-01-19 15:05:42,651 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.01 03:05:42 BasicIcfg [2022-01-19 15:05:42,651 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-01-19 15:05:42,651 INFO L158 Benchmark]: Toolchain (without parser) took 788923.50ms. Allocated memory was 371.2MB in the beginning and 9.9GB in the end (delta: 9.5GB). Free memory was 314.0MB in the beginning and 6.8GB in the end (delta: -6.5GB). Peak memory consumption was 6.3GB. Max. memory is 16.0GB. [2022-01-19 15:05:42,651 INFO L158 Benchmark]: CDTParser took 0.08ms. Allocated memory is still 371.2MB. Free memory is still 330.2MB. There was no memory consumed. Max. memory is 16.0GB. [2022-01-19 15:05:42,651 INFO L158 Benchmark]: CACSL2BoogieTranslator took 188.23ms. Allocated memory was 371.2MB in the beginning and 505.4MB in the end (delta: 134.2MB). Free memory was 313.9MB in the beginning and 473.0MB in the end (delta: -159.1MB). Peak memory consumption was 8.7MB. Max. memory is 16.0GB. [2022-01-19 15:05:42,652 INFO L158 Benchmark]: Boogie Procedure Inliner took 23.77ms. Allocated memory is still 505.4MB. Free memory was 473.0MB in the beginning and 470.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2022-01-19 15:05:42,652 INFO L158 Benchmark]: Boogie Preprocessor took 25.40ms. Allocated memory is still 505.4MB. Free memory was 470.9MB in the beginning and 469.9MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2022-01-19 15:05:42,652 INFO L158 Benchmark]: RCFGBuilder took 382.93ms. Allocated memory is still 505.4MB. Free memory was 469.9MB in the beginning and 446.8MB in the end (delta: 23.1MB). Peak memory consumption was 23.1MB. Max. memory is 16.0GB. [2022-01-19 15:05:42,652 INFO L158 Benchmark]: TraceAbstraction took 788299.70ms. Allocated memory was 505.4MB in the beginning and 9.9GB in the end (delta: 9.4GB). Free memory was 446.8MB in the beginning and 6.8GB in the end (delta: -6.3GB). Peak memory consumption was 6.3GB. Max. memory is 16.0GB. [2022-01-19 15:05:42,653 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.08ms. Allocated memory is still 371.2MB. Free memory is still 330.2MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 188.23ms. Allocated memory was 371.2MB in the beginning and 505.4MB in the end (delta: 134.2MB). Free memory was 313.9MB in the beginning and 473.0MB in the end (delta: -159.1MB). Peak memory consumption was 8.7MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 23.77ms. Allocated memory is still 505.4MB. Free memory was 473.0MB in the beginning and 470.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 25.40ms. Allocated memory is still 505.4MB. Free memory was 470.9MB in the beginning and 469.9MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 382.93ms. Allocated memory is still 505.4MB. Free memory was 469.9MB in the beginning and 446.8MB in the end (delta: 23.1MB). Peak memory consumption was 23.1MB. Max. memory is 16.0GB. * TraceAbstraction took 788299.70ms. Allocated memory was 505.4MB in the beginning and 9.9GB in the end (delta: 9.4GB). Free memory was 446.8MB in the beginning and 6.8GB in the end (delta: -6.3GB). Peak memory consumption was 6.3GB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 98]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: 93]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: 92]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing RemoveRedundantFlow. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 146 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 788.2s, OverallIterations: 19, TraceHistogramMax: 2, PathProgramHistogramMax: 11, EmptinessCheckTime: 0.0s, AutomataDifference: 722.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 21031 SdHoareTripleChecker+Valid, 22.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 21031 mSDsluCounter, 27930 SdHoareTripleChecker+Invalid, 19.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 12986 IncrementalHoareTripleChecker+Unchecked, 35688 mSDsCounter, 4599 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 51679 IncrementalHoareTripleChecker+Invalid, 69264 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 4599 mSolverCounterUnsat, 962 mSDtfsCounter, 51679 mSolverCounterSat, 0.2s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 5357 GetRequests, 3002 SyntacticMatches, 165 SemanticMatches, 2190 ConstructedPredicates, 7 IntricatePredicates, 0 DeprecatedPredicates, 128968 ImplicationChecksByTransitivity, 130.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=201609occurred in iteration=18, InterpolantAutomatonStates: 1316, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.8s SatisfiabilityAnalysisTime, 61.2s InterpolantComputationTime, 4039 NumberOfCodeBlocks, 3998 NumberOfCodeBlocksAsserted, 46 NumberOfCheckSat, 5694 ConstructedInterpolants, 352 QuantifiedInterpolants, 100552 SizeOfPredicates, 410 NumberOfNonLiveVariables, 4176 ConjunctsInSsa, 698 ConjunctsInUnsatCore, 48 InterpolantComputations, 5 PerfectInterpolantSequences, 84/540 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown