/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/popl20-bad-threaded-sum-2.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-?-3902331-m [2022-09-20 23:05:39,909 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-09-20 23:05:39,911 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-09-20 23:05:39,930 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-09-20 23:05:39,931 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-09-20 23:05:39,931 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-09-20 23:05:39,932 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-09-20 23:05:39,933 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-09-20 23:05:39,934 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-09-20 23:05:39,935 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-09-20 23:05:39,935 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-09-20 23:05:39,936 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-09-20 23:05:39,936 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-09-20 23:05:39,937 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-09-20 23:05:39,937 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-09-20 23:05:39,938 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-09-20 23:05:39,938 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-09-20 23:05:39,939 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-09-20 23:05:39,940 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-09-20 23:05:39,941 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-09-20 23:05:39,942 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-09-20 23:05:39,943 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-09-20 23:05:39,943 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-09-20 23:05:39,944 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-09-20 23:05:39,946 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-09-20 23:05:39,946 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-09-20 23:05:39,946 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-09-20 23:05:39,947 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-09-20 23:05:39,947 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-09-20 23:05:39,948 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-09-20 23:05:39,948 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-09-20 23:05:39,948 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-09-20 23:05:39,949 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-09-20 23:05:39,949 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-09-20 23:05:39,950 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-09-20 23:05:39,950 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-09-20 23:05:39,950 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-09-20 23:05:39,950 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-09-20 23:05:39,951 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-09-20 23:05:39,951 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-09-20 23:05:39,951 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-09-20 23:05:39,952 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.epf [2022-09-20 23:05:39,966 INFO L113 SettingsManager]: Loading preferences was successful [2022-09-20 23:05:39,966 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-09-20 23:05:39,967 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-09-20 23:05:39,967 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-09-20 23:05:39,968 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-09-20 23:05:39,968 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-09-20 23:05:39,968 INFO L138 SettingsManager]: * Use SBE=true [2022-09-20 23:05:39,968 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-09-20 23:05:39,968 INFO L138 SettingsManager]: * sizeof long=4 [2022-09-20 23:05:39,968 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-09-20 23:05:39,968 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-09-20 23:05:39,968 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-09-20 23:05:39,969 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-09-20 23:05:39,969 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-09-20 23:05:39,969 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-09-20 23:05:39,969 INFO L138 SettingsManager]: * sizeof long double=12 [2022-09-20 23:05:39,969 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-09-20 23:05:39,969 INFO L138 SettingsManager]: * Use constant arrays=true [2022-09-20 23:05:39,969 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-09-20 23:05:39,969 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-09-20 23:05:39,970 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-09-20 23:05:39,970 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-09-20 23:05:39,970 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-09-20 23:05:39,970 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-09-20 23:05:39,970 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-09-20 23:05:39,970 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-09-20 23:05:39,970 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-09-20 23:05:39,970 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-09-20 23:05:39,970 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-09-20 23:05:39,971 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-09-20 23:05:39,971 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-09-20 23:05:39,971 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-09-20 23:05:40,135 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-09-20 23:05:40,153 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-09-20 23:05:40,155 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-09-20 23:05:40,156 INFO L271 PluginConnector]: Initializing CDTParser... [2022-09-20 23:05:40,158 INFO L275 PluginConnector]: CDTParser initialized [2022-09-20 23:05:40,159 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-bad-threaded-sum-2.wvr.c [2022-09-20 23:05:40,216 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e8f24d9f8/a0ddeb3ad0cb426f9f0436f5275b43c0/FLAG8748ce29a [2022-09-20 23:05:40,564 INFO L306 CDTParser]: Found 1 translation units. [2022-09-20 23:05:40,565 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-threaded-sum-2.wvr.c [2022-09-20 23:05:40,572 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e8f24d9f8/a0ddeb3ad0cb426f9f0436f5275b43c0/FLAG8748ce29a [2022-09-20 23:05:40,994 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e8f24d9f8/a0ddeb3ad0cb426f9f0436f5275b43c0 [2022-09-20 23:05:40,996 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-09-20 23:05:40,997 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-09-20 23:05:40,999 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-09-20 23:05:41,000 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-09-20 23:05:41,002 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-09-20 23:05:41,003 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 11:05:40" (1/1) ... [2022-09-20 23:05:41,004 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2c6347af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 11:05:41, skipping insertion in model container [2022-09-20 23:05:41,004 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 11:05:40" (1/1) ... [2022-09-20 23:05:41,008 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-09-20 23:05:41,022 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-09-20 23:05:41,194 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-bad-threaded-sum-2.wvr.c[2476,2489] [2022-09-20 23:05:41,196 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-09-20 23:05:41,207 INFO L203 MainTranslator]: Completed pre-run [2022-09-20 23:05:41,240 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-bad-threaded-sum-2.wvr.c[2476,2489] [2022-09-20 23:05:41,241 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-09-20 23:05:41,251 INFO L208 MainTranslator]: Completed translation [2022-09-20 23:05:41,253 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 11:05:41 WrapperNode [2022-09-20 23:05:41,253 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-09-20 23:05:41,254 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-09-20 23:05:41,255 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-09-20 23:05:41,255 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-09-20 23:05:41,259 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 11:05:41" (1/1) ... [2022-09-20 23:05:41,274 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 11:05:41" (1/1) ... [2022-09-20 23:05:41,297 INFO L138 Inliner]: procedures = 21, calls = 34, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 59 [2022-09-20 23:05:41,298 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-09-20 23:05:41,299 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-09-20 23:05:41,299 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-09-20 23:05:41,299 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-09-20 23:05:41,304 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 11:05:41" (1/1) ... [2022-09-20 23:05:41,305 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 11:05:41" (1/1) ... [2022-09-20 23:05:41,308 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 11:05:41" (1/1) ... [2022-09-20 23:05:41,309 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 11:05:41" (1/1) ... [2022-09-20 23:05:41,323 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 11:05:41" (1/1) ... [2022-09-20 23:05:41,329 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 11:05:41" (1/1) ... [2022-09-20 23:05:41,329 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 11:05:41" (1/1) ... [2022-09-20 23:05:41,331 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-09-20 23:05:41,331 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-09-20 23:05:41,332 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-09-20 23:05:41,332 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-09-20 23:05:41,334 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 11:05:41" (1/1) ... [2022-09-20 23:05:41,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-09-20 23:05:41,350 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 23:05:41,373 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) [2022-09-20 23:05:41,388 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 [2022-09-20 23:05:41,410 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-09-20 23:05:41,411 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-09-20 23:05:41,411 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-09-20 23:05:41,411 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-09-20 23:05:41,411 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-09-20 23:05:41,411 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-09-20 23:05:41,411 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-09-20 23:05:41,411 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-09-20 23:05:41,411 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-09-20 23:05:41,411 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-09-20 23:05:41,411 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-09-20 23:05:41,412 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-09-20 23:05:41,412 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-09-20 23:05:41,412 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-09-20 23:05:41,413 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-09-20 23:05:41,484 INFO L234 CfgBuilder]: Building ICFG [2022-09-20 23:05:41,486 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-09-20 23:05:41,597 INFO L275 CfgBuilder]: Performing block encoding [2022-09-20 23:05:41,640 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-09-20 23:05:41,640 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-09-20 23:05:41,642 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 11:05:41 BoogieIcfgContainer [2022-09-20 23:05:41,642 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-09-20 23:05:41,643 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-09-20 23:05:41,643 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-09-20 23:05:41,646 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-09-20 23:05:41,646 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.09 11:05:40" (1/3) ... [2022-09-20 23:05:41,646 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b463ac9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 11:05:41, skipping insertion in model container [2022-09-20 23:05:41,646 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 11:05:41" (2/3) ... [2022-09-20 23:05:41,647 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b463ac9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 11:05:41, skipping insertion in model container [2022-09-20 23:05:41,647 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 11:05:41" (3/3) ... [2022-09-20 23:05:41,648 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-threaded-sum-2.wvr.c [2022-09-20 23:05:41,659 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-09-20 23:05:41,659 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-09-20 23:05:41,659 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-09-20 23:05:41,698 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-09-20 23:05:41,732 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 89 places, 88 transitions, 192 flow [2022-09-20 23:05:41,774 INFO L130 PetriNetUnfolder]: 6/86 cut-off events. [2022-09-20 23:05:41,774 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-09-20 23:05:41,778 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95 conditions, 86 events. 6/86 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 43 event pairs, 0 based on Foata normal form. 0/79 useless extension candidates. Maximal degree in co-relation 52. Up to 2 conditions per place. [2022-09-20 23:05:41,778 INFO L82 GeneralOperation]: Start removeDead. Operand has 89 places, 88 transitions, 192 flow [2022-09-20 23:05:41,781 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 78 places, 77 transitions, 166 flow [2022-09-20 23:05:41,788 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-09-20 23:05:41,795 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@2299eef9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-09-20 23:05:41,796 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-09-20 23:05:41,811 INFO L130 PetriNetUnfolder]: 6/76 cut-off events. [2022-09-20 23:05:41,811 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-09-20 23:05:41,811 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 23:05:41,812 INFO L208 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] [2022-09-20 23:05:41,812 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 23:05:41,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 23:05:41,816 INFO L85 PathProgramCache]: Analyzing trace with hash 662225177, now seen corresponding path program 1 times [2022-09-20 23:05:41,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 23:05:41,822 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745598105] [2022-09-20 23:05:41,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 23:05:41,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 23:05:41,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 23:05:42,019 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 23:05:42,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 23:05:42,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745598105] [2022-09-20 23:05:42,020 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745598105] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-20 23:05:42,021 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-20 23:05:42,021 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-09-20 23:05:42,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503752536] [2022-09-20 23:05:42,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-20 23:05:42,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-09-20 23:05:42,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 23:05:42,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-09-20 23:05:42,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-09-20 23:05:42,074 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 88 [2022-09-20 23:05:42,078 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 77 transitions, 166 flow. Second operand has 2 states, 2 states have (on average 79.0) internal successors, (158), 2 states have internal predecessors, (158), 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) [2022-09-20 23:05:42,078 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 23:05:42,078 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 88 [2022-09-20 23:05:42,079 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 23:05:42,150 INFO L130 PetriNetUnfolder]: 16/112 cut-off events. [2022-09-20 23:05:42,150 INFO L131 PetriNetUnfolder]: For 27/28 co-relation queries the response was YES. [2022-09-20 23:05:42,151 INFO L83 FinitePrefix]: Finished finitePrefix Result has 156 conditions, 112 events. 16/112 cut-off events. For 27/28 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 179 event pairs, 5 based on Foata normal form. 14/115 useless extension candidates. Maximal degree in co-relation 82. Up to 27 conditions per place. [2022-09-20 23:05:42,153 INFO L137 encePairwiseOnDemand]: 84/88 looper letters, 7 selfloop transitions, 0 changer transitions 2/73 dead transitions. [2022-09-20 23:05:42,154 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 73 transitions, 172 flow [2022-09-20 23:05:42,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-09-20 23:05:42,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-09-20 23:05:42,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 163 transitions. [2022-09-20 23:05:42,164 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.9261363636363636 [2022-09-20 23:05:42,165 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 163 transitions. [2022-09-20 23:05:42,166 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 163 transitions. [2022-09-20 23:05:42,167 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 23:05:42,169 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 163 transitions. [2022-09-20 23:05:42,174 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 81.5) internal successors, (163), 2 states have internal predecessors, (163), 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) [2022-09-20 23:05:42,179 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 88.0) internal successors, (264), 3 states have internal predecessors, (264), 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) [2022-09-20 23:05:42,180 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 88.0) internal successors, (264), 3 states have internal predecessors, (264), 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) [2022-09-20 23:05:42,182 INFO L175 Difference]: Start difference. First operand has 78 places, 77 transitions, 166 flow. Second operand 2 states and 163 transitions. [2022-09-20 23:05:42,182 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 73 transitions, 172 flow [2022-09-20 23:05:42,188 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 73 transitions, 164 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-09-20 23:05:42,193 INFO L231 Difference]: Finished difference. Result has 75 places, 71 transitions, 146 flow [2022-09-20 23:05:42,195 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=146, PETRI_PLACES=75, PETRI_TRANSITIONS=71} [2022-09-20 23:05:42,202 INFO L287 CegarLoopForPetriNet]: 78 programPoint places, -3 predicate places. [2022-09-20 23:05:42,202 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 71 transitions, 146 flow [2022-09-20 23:05:42,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 79.0) internal successors, (158), 2 states have internal predecessors, (158), 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) [2022-09-20 23:05:42,203 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 23:05:42,203 INFO L208 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] [2022-09-20 23:05:42,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-09-20 23:05:42,204 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 23:05:42,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 23:05:42,205 INFO L85 PathProgramCache]: Analyzing trace with hash -1911377001, now seen corresponding path program 1 times [2022-09-20 23:05:42,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 23:05:42,206 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965263106] [2022-09-20 23:05:42,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 23:05:42,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 23:05:42,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 23:05:42,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 23:05:42,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 23:05:42,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965263106] [2022-09-20 23:05:42,485 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965263106] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-20 23:05:42,485 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-20 23:05:42,485 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-09-20 23:05:42,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054990899] [2022-09-20 23:05:42,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-20 23:05:42,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-09-20 23:05:42,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 23:05:42,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-09-20 23:05:42,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-09-20 23:05:42,488 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 88 [2022-09-20 23:05:42,488 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 71 transitions, 146 flow. Second operand has 6 states, 6 states have (on average 60.0) internal successors, (360), 6 states have internal predecessors, (360), 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) [2022-09-20 23:05:42,488 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 23:05:42,489 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 88 [2022-09-20 23:05:42,489 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 23:05:42,673 INFO L130 PetriNetUnfolder]: 44/170 cut-off events. [2022-09-20 23:05:42,674 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-09-20 23:05:42,677 INFO L83 FinitePrefix]: Finished finitePrefix Result has 277 conditions, 170 events. 44/170 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 420 event pairs, 10 based on Foata normal form. 0/160 useless extension candidates. Maximal degree in co-relation 274. Up to 49 conditions per place. [2022-09-20 23:05:42,684 INFO L137 encePairwiseOnDemand]: 81/88 looper letters, 33 selfloop transitions, 7 changer transitions 0/87 dead transitions. [2022-09-20 23:05:42,684 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 87 transitions, 259 flow [2022-09-20 23:05:42,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-09-20 23:05:42,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-09-20 23:05:42,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 441 transitions. [2022-09-20 23:05:42,689 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7159090909090909 [2022-09-20 23:05:42,689 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 441 transitions. [2022-09-20 23:05:42,689 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 441 transitions. [2022-09-20 23:05:42,689 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 23:05:42,689 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 441 transitions. [2022-09-20 23:05:42,691 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 63.0) internal successors, (441), 7 states have internal predecessors, (441), 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) [2022-09-20 23:05:42,692 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 88.0) internal successors, (704), 8 states have internal predecessors, (704), 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) [2022-09-20 23:05:42,693 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 88.0) internal successors, (704), 8 states have internal predecessors, (704), 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) [2022-09-20 23:05:42,693 INFO L175 Difference]: Start difference. First operand has 75 places, 71 transitions, 146 flow. Second operand 7 states and 441 transitions. [2022-09-20 23:05:42,693 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 87 transitions, 259 flow [2022-09-20 23:05:42,693 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 87 transitions, 259 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-09-20 23:05:42,695 INFO L231 Difference]: Finished difference. Result has 82 places, 75 transitions, 187 flow [2022-09-20 23:05:42,695 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=187, PETRI_PLACES=82, PETRI_TRANSITIONS=75} [2022-09-20 23:05:42,695 INFO L287 CegarLoopForPetriNet]: 78 programPoint places, 4 predicate places. [2022-09-20 23:05:42,695 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 75 transitions, 187 flow [2022-09-20 23:05:42,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 60.0) internal successors, (360), 6 states have internal predecessors, (360), 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) [2022-09-20 23:05:42,696 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 23:05:42,696 INFO L208 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] [2022-09-20 23:05:42,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-09-20 23:05:42,696 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 23:05:42,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 23:05:42,697 INFO L85 PathProgramCache]: Analyzing trace with hash -839433702, now seen corresponding path program 1 times [2022-09-20 23:05:42,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 23:05:42,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118286641] [2022-09-20 23:05:42,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 23:05:42,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 23:05:42,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 23:05:43,267 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 23:05:43,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 23:05:43,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118286641] [2022-09-20 23:05:43,268 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118286641] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 23:05:43,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1848981298] [2022-09-20 23:05:43,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 23:05:43,269 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 23:05:43,269 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 23:05:43,271 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) [2022-09-20 23:05:43,272 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-09-20 23:05:43,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 23:05:43,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 26 conjunts are in the unsatisfiable core [2022-09-20 23:05:43,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 23:05:44,071 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 23:05:44,072 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-20 23:05:44,733 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 23:05:44,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1848981298] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-20 23:05:44,734 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-20 23:05:44,734 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 14] total 31 [2022-09-20 23:05:44,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214578794] [2022-09-20 23:05:44,734 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-20 23:05:44,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-09-20 23:05:44,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 23:05:44,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-09-20 23:05:44,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=716, Unknown=0, NotChecked=0, Total=930 [2022-09-20 23:05:44,737 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 88 [2022-09-20 23:05:44,739 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 75 transitions, 187 flow. Second operand has 31 states, 31 states have (on average 51.25806451612903) internal successors, (1589), 31 states have internal predecessors, (1589), 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) [2022-09-20 23:05:44,739 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 23:05:44,739 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 88 [2022-09-20 23:05:44,739 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 23:05:47,938 INFO L130 PetriNetUnfolder]: 453/1271 cut-off events. [2022-09-20 23:05:47,938 INFO L131 PetriNetUnfolder]: For 353/353 co-relation queries the response was YES. [2022-09-20 23:05:47,942 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2633 conditions, 1271 events. 453/1271 cut-off events. For 353/353 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 8336 event pairs, 28 based on Foata normal form. 5/1182 useless extension candidates. Maximal degree in co-relation 2626. Up to 151 conditions per place. [2022-09-20 23:05:47,946 INFO L137 encePairwiseOnDemand]: 68/88 looper letters, 181 selfloop transitions, 124 changer transitions 66/410 dead transitions. [2022-09-20 23:05:47,946 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 410 transitions, 1917 flow [2022-09-20 23:05:47,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-09-20 23:05:47,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2022-09-20 23:05:47,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 3991 transitions. [2022-09-20 23:05:47,954 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.6128685503685504 [2022-09-20 23:05:47,954 INFO L72 ComplementDD]: Start complementDD. Operand 74 states and 3991 transitions. [2022-09-20 23:05:47,954 INFO L73 IsDeterministic]: Start isDeterministic. Operand 74 states and 3991 transitions. [2022-09-20 23:05:47,956 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 23:05:47,956 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 74 states and 3991 transitions. [2022-09-20 23:05:47,965 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 75 states, 74 states have (on average 53.932432432432435) internal successors, (3991), 74 states have internal predecessors, (3991), 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) [2022-09-20 23:05:47,977 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 75 states, 75 states have (on average 88.0) internal successors, (6600), 75 states have internal predecessors, (6600), 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) [2022-09-20 23:05:47,979 INFO L81 ComplementDD]: Finished complementDD. Result has 75 states, 75 states have (on average 88.0) internal successors, (6600), 75 states have internal predecessors, (6600), 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) [2022-09-20 23:05:47,979 INFO L175 Difference]: Start difference. First operand has 82 places, 75 transitions, 187 flow. Second operand 74 states and 3991 transitions. [2022-09-20 23:05:47,979 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 410 transitions, 1917 flow [2022-09-20 23:05:47,987 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 410 transitions, 1900 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-09-20 23:05:47,992 INFO L231 Difference]: Finished difference. Result has 205 places, 203 transitions, 1145 flow [2022-09-20 23:05:47,992 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=180, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=74, PETRI_FLOW=1145, PETRI_PLACES=205, PETRI_TRANSITIONS=203} [2022-09-20 23:05:47,993 INFO L287 CegarLoopForPetriNet]: 78 programPoint places, 127 predicate places. [2022-09-20 23:05:47,993 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 203 transitions, 1145 flow [2022-09-20 23:05:47,993 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 51.25806451612903) internal successors, (1589), 31 states have internal predecessors, (1589), 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) [2022-09-20 23:05:47,994 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 23:05:47,994 INFO L208 CegarLoopForPetriNet]: trace histogram [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] [2022-09-20 23:05:48,014 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-09-20 23:05:48,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 23:05:48,195 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 23:05:48,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 23:05:48,195 INFO L85 PathProgramCache]: Analyzing trace with hash 1440456161, now seen corresponding path program 2 times [2022-09-20 23:05:48,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 23:05:48,195 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49882548] [2022-09-20 23:05:48,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 23:05:48,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 23:05:48,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 23:05:48,251 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 23:05:48,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 23:05:48,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49882548] [2022-09-20 23:05:48,252 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49882548] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-20 23:05:48,252 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-20 23:05:48,252 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-09-20 23:05:48,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875112206] [2022-09-20 23:05:48,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-20 23:05:48,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-09-20 23:05:48,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 23:05:48,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-09-20 23:05:48,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-09-20 23:05:48,253 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 88 [2022-09-20 23:05:48,254 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 203 transitions, 1145 flow. Second operand has 5 states, 5 states have (on average 68.0) internal successors, (340), 5 states have internal predecessors, (340), 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) [2022-09-20 23:05:48,254 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 23:05:48,254 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 88 [2022-09-20 23:05:48,254 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 23:05:48,563 INFO L130 PetriNetUnfolder]: 593/1530 cut-off events. [2022-09-20 23:05:48,564 INFO L131 PetriNetUnfolder]: For 25477/25477 co-relation queries the response was YES. [2022-09-20 23:05:48,572 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7137 conditions, 1530 events. 593/1530 cut-off events. For 25477/25477 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 10073 event pairs, 40 based on Foata normal form. 26/1547 useless extension candidates. Maximal degree in co-relation 7078. Up to 315 conditions per place. [2022-09-20 23:05:48,581 INFO L137 encePairwiseOnDemand]: 81/88 looper letters, 297 selfloop transitions, 79 changer transitions 0/428 dead transitions. [2022-09-20 23:05:48,582 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 428 transitions, 3582 flow [2022-09-20 23:05:48,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-09-20 23:05:48,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-09-20 23:05:48,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 496 transitions. [2022-09-20 23:05:48,583 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8051948051948052 [2022-09-20 23:05:48,583 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 496 transitions. [2022-09-20 23:05:48,583 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 496 transitions. [2022-09-20 23:05:48,583 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 23:05:48,583 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 496 transitions. [2022-09-20 23:05:48,584 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 70.85714285714286) internal successors, (496), 7 states have internal predecessors, (496), 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) [2022-09-20 23:05:48,585 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 88.0) internal successors, (704), 8 states have internal predecessors, (704), 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) [2022-09-20 23:05:48,585 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 88.0) internal successors, (704), 8 states have internal predecessors, (704), 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) [2022-09-20 23:05:48,585 INFO L175 Difference]: Start difference. First operand has 205 places, 203 transitions, 1145 flow. Second operand 7 states and 496 transitions. [2022-09-20 23:05:48,585 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 428 transitions, 3582 flow [2022-09-20 23:05:48,647 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 428 transitions, 3440 flow, removed 63 selfloop flow, removed 21 redundant places. [2022-09-20 23:05:48,651 INFO L231 Difference]: Finished difference. Result has 179 places, 254 transitions, 1812 flow [2022-09-20 23:05:48,652 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=1050, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1812, PETRI_PLACES=179, PETRI_TRANSITIONS=254} [2022-09-20 23:05:48,652 INFO L287 CegarLoopForPetriNet]: 78 programPoint places, 101 predicate places. [2022-09-20 23:05:48,652 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 254 transitions, 1812 flow [2022-09-20 23:05:48,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 68.0) internal successors, (340), 5 states have internal predecessors, (340), 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) [2022-09-20 23:05:48,653 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 23:05:48,653 INFO L208 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] [2022-09-20 23:05:48,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-09-20 23:05:48,653 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 23:05:48,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 23:05:48,653 INFO L85 PathProgramCache]: Analyzing trace with hash 18061864, now seen corresponding path program 1 times [2022-09-20 23:05:48,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 23:05:48,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162966846] [2022-09-20 23:05:48,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 23:05:48,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 23:05:48,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 23:05:49,436 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 23:05:49,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 23:05:49,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162966846] [2022-09-20 23:05:49,437 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162966846] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 23:05:49,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491745654] [2022-09-20 23:05:49,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 23:05:49,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 23:05:49,437 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 23:05:49,438 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) [2022-09-20 23:05:49,438 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-09-20 23:05:49,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 23:05:49,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 28 conjunts are in the unsatisfiable core [2022-09-20 23:05:49,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 23:05:50,157 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 23:05:50,157 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-20 23:05:53,989 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 23:05:53,989 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1491745654] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-20 23:05:53,989 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-20 23:05:53,989 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 17, 17] total 36 [2022-09-20 23:05:53,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054482033] [2022-09-20 23:05:53,990 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-20 23:05:53,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-09-20 23:05:53,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 23:05:53,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-09-20 23:05:53,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=1045, Unknown=0, NotChecked=0, Total=1260 [2022-09-20 23:05:53,992 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 88 [2022-09-20 23:05:53,994 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 254 transitions, 1812 flow. Second operand has 36 states, 36 states have (on average 53.27777777777778) internal successors, (1918), 36 states have internal predecessors, (1918), 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) [2022-09-20 23:05:53,994 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 23:05:53,994 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 88 [2022-09-20 23:05:53,994 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 23:06:09,525 INFO L130 PetriNetUnfolder]: 969/2869 cut-off events. [2022-09-20 23:06:09,525 INFO L131 PetriNetUnfolder]: For 30975/31012 co-relation queries the response was YES. [2022-09-20 23:06:09,538 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12786 conditions, 2869 events. 969/2869 cut-off events. For 30975/31012 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 23704 event pairs, 14 based on Foata normal form. 33/2897 useless extension candidates. Maximal degree in co-relation 12737. Up to 477 conditions per place. [2022-09-20 23:06:09,553 INFO L137 encePairwiseOnDemand]: 69/88 looper letters, 276 selfloop transitions, 292 changer transitions 98/730 dead transitions. [2022-09-20 23:06:09,553 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 730 transitions, 7671 flow [2022-09-20 23:06:09,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-09-20 23:06:09,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2022-09-20 23:06:09,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 4919 transitions. [2022-09-20 23:06:09,558 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.6210858585858586 [2022-09-20 23:06:09,558 INFO L72 ComplementDD]: Start complementDD. Operand 90 states and 4919 transitions. [2022-09-20 23:06:09,558 INFO L73 IsDeterministic]: Start isDeterministic. Operand 90 states and 4919 transitions. [2022-09-20 23:06:09,560 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 23:06:09,560 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 90 states and 4919 transitions. [2022-09-20 23:06:09,567 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 91 states, 90 states have (on average 54.65555555555556) internal successors, (4919), 90 states have internal predecessors, (4919), 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) [2022-09-20 23:06:09,575 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 91 states, 91 states have (on average 88.0) internal successors, (8008), 91 states have internal predecessors, (8008), 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) [2022-09-20 23:06:09,577 INFO L81 ComplementDD]: Finished complementDD. Result has 91 states, 91 states have (on average 88.0) internal successors, (8008), 91 states have internal predecessors, (8008), 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) [2022-09-20 23:06:09,577 INFO L175 Difference]: Start difference. First operand has 179 places, 254 transitions, 1812 flow. Second operand 90 states and 4919 transitions. [2022-09-20 23:06:09,577 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 730 transitions, 7671 flow [2022-09-20 23:06:09,687 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 730 transitions, 7609 flow, removed 31 selfloop flow, removed 0 redundant places. [2022-09-20 23:06:09,697 INFO L231 Difference]: Finished difference. Result has 313 places, 484 transitions, 5385 flow [2022-09-20 23:06:09,697 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=1794, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=254, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=90, PETRI_FLOW=5385, PETRI_PLACES=313, PETRI_TRANSITIONS=484} [2022-09-20 23:06:09,700 INFO L287 CegarLoopForPetriNet]: 78 programPoint places, 235 predicate places. [2022-09-20 23:06:09,700 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 484 transitions, 5385 flow [2022-09-20 23:06:09,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 53.27777777777778) internal successors, (1918), 36 states have internal predecessors, (1918), 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) [2022-09-20 23:06:09,701 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 23:06:09,701 INFO L208 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] [2022-09-20 23:06:09,719 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-09-20 23:06:09,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 23:06:09,910 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 23:06:09,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 23:06:09,910 INFO L85 PathProgramCache]: Analyzing trace with hash 1199646310, now seen corresponding path program 2 times [2022-09-20 23:06:09,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 23:06:09,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713426620] [2022-09-20 23:06:09,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 23:06:09,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 23:06:09,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 23:06:10,606 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 23:06:10,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 23:06:10,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713426620] [2022-09-20 23:06:10,606 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713426620] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 23:06:10,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [565958404] [2022-09-20 23:06:10,607 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-09-20 23:06:10,607 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 23:06:10,607 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 23:06:10,608 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) [2022-09-20 23:06:10,610 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-09-20 23:06:10,749 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-09-20 23:06:10,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-09-20 23:06:10,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 31 conjunts are in the unsatisfiable core [2022-09-20 23:06:10,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 23:06:11,905 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 23:06:11,905 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-20 23:06:13,496 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 23:06:13,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [565958404] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-20 23:06:13,497 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-20 23:06:13,497 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 20, 19] total 45 [2022-09-20 23:06:13,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764638958] [2022-09-20 23:06:13,497 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-20 23:06:13,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-09-20 23:06:13,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 23:06:13,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-09-20 23:06:13,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=1650, Unknown=0, NotChecked=0, Total=1980 [2022-09-20 23:06:13,501 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 88 [2022-09-20 23:06:13,502 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 484 transitions, 5385 flow. Second operand has 45 states, 45 states have (on average 50.955555555555556) internal successors, (2293), 45 states have internal predecessors, (2293), 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) [2022-09-20 23:06:13,502 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 23:06:13,502 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 88 [2022-09-20 23:06:13,503 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 23:06:43,943 INFO L130 PetriNetUnfolder]: 1900/4840 cut-off events. [2022-09-20 23:06:43,943 INFO L131 PetriNetUnfolder]: For 75586/75586 co-relation queries the response was YES. [2022-09-20 23:06:43,983 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27813 conditions, 4840 events. 1900/4840 cut-off events. For 75586/75586 co-relation queries the response was YES. Maximal size of possible extension queue 283. Compared 41214 event pairs, 30 based on Foata normal form. 15/4851 useless extension candidates. Maximal degree in co-relation 27719. Up to 937 conditions per place. [2022-09-20 23:06:44,016 INFO L137 encePairwiseOnDemand]: 66/88 looper letters, 544 selfloop transitions, 704 changer transitions 114/1401 dead transitions. [2022-09-20 23:06:44,016 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 416 places, 1401 transitions, 19403 flow [2022-09-20 23:06:44,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2022-09-20 23:06:44,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2022-09-20 23:06:44,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 7261 transitions. [2022-09-20 23:06:44,023 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.5979084321475626 [2022-09-20 23:06:44,023 INFO L72 ComplementDD]: Start complementDD. Operand 138 states and 7261 transitions. [2022-09-20 23:06:44,023 INFO L73 IsDeterministic]: Start isDeterministic. Operand 138 states and 7261 transitions. [2022-09-20 23:06:44,024 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 23:06:44,024 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 138 states and 7261 transitions. [2022-09-20 23:06:44,033 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 139 states, 138 states have (on average 52.61594202898551) internal successors, (7261), 138 states have internal predecessors, (7261), 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) [2022-09-20 23:06:44,044 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 139 states, 139 states have (on average 88.0) internal successors, (12232), 139 states have internal predecessors, (12232), 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) [2022-09-20 23:06:44,048 INFO L81 ComplementDD]: Finished complementDD. Result has 139 states, 139 states have (on average 88.0) internal successors, (12232), 139 states have internal predecessors, (12232), 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) [2022-09-20 23:06:44,048 INFO L175 Difference]: Start difference. First operand has 313 places, 484 transitions, 5385 flow. Second operand 138 states and 7261 transitions. [2022-09-20 23:06:44,048 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 416 places, 1401 transitions, 19403 flow [2022-09-20 23:06:44,397 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 1401 transitions, 16695 flow, removed 1295 selfloop flow, removed 50 redundant places. [2022-09-20 23:06:44,412 INFO L231 Difference]: Finished difference. Result has 434 places, 1011 transitions, 12721 flow [2022-09-20 23:06:44,412 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=4562, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=484, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=226, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=138, PETRI_FLOW=12721, PETRI_PLACES=434, PETRI_TRANSITIONS=1011} [2022-09-20 23:06:44,413 INFO L287 CegarLoopForPetriNet]: 78 programPoint places, 356 predicate places. [2022-09-20 23:06:44,413 INFO L495 AbstractCegarLoop]: Abstraction has has 434 places, 1011 transitions, 12721 flow [2022-09-20 23:06:44,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 50.955555555555556) internal successors, (2293), 45 states have internal predecessors, (2293), 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) [2022-09-20 23:06:44,415 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 23:06:44,415 INFO L208 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] [2022-09-20 23:06:44,445 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-09-20 23:06:44,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 23:06:44,632 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 23:06:44,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 23:06:44,632 INFO L85 PathProgramCache]: Analyzing trace with hash 1133316332, now seen corresponding path program 3 times [2022-09-20 23:06:44,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 23:06:44,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118153385] [2022-09-20 23:06:44,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 23:06:44,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 23:06:44,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 23:06:45,271 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 23:06:45,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 23:06:45,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118153385] [2022-09-20 23:06:45,272 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118153385] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 23:06:45,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1554946323] [2022-09-20 23:06:45,272 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-09-20 23:06:45,272 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 23:06:45,272 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 23:06:45,273 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) [2022-09-20 23:06:45,274 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-09-20 23:06:45,373 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-09-20 23:06:45,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-09-20 23:06:45,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 23 conjunts are in the unsatisfiable core [2022-09-20 23:06:45,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 23:06:46,279 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 23:06:46,279 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-20 23:06:47,891 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 23:06:47,892 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1554946323] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-20 23:06:47,892 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-20 23:06:47,892 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15, 15] total 35 [2022-09-20 23:06:47,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402421325] [2022-09-20 23:06:47,892 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-20 23:06:47,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-09-20 23:06:47,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 23:06:47,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-09-20 23:06:47,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=1035, Unknown=0, NotChecked=0, Total=1190 [2022-09-20 23:06:47,894 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 88 [2022-09-20 23:06:47,895 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 434 places, 1011 transitions, 12721 flow. Second operand has 35 states, 35 states have (on average 51.142857142857146) internal successors, (1790), 35 states have internal predecessors, (1790), 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) [2022-09-20 23:06:47,895 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 23:06:47,895 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 88 [2022-09-20 23:06:47,895 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 23:07:06,767 INFO L130 PetriNetUnfolder]: 2447/6111 cut-off events. [2022-09-20 23:07:06,767 INFO L131 PetriNetUnfolder]: For 132514/132514 co-relation queries the response was YES. [2022-09-20 23:07:06,843 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44405 conditions, 6111 events. 2447/6111 cut-off events. For 132514/132514 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 54180 event pairs, 84 based on Foata normal form. 15/6118 useless extension candidates. Maximal degree in co-relation 44280. Up to 1805 conditions per place. [2022-09-20 23:07:06,885 INFO L137 encePairwiseOnDemand]: 68/88 looper letters, 891 selfloop transitions, 758 changer transitions 118/1806 dead transitions. [2022-09-20 23:07:06,886 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 498 places, 1806 transitions, 27495 flow [2022-09-20 23:07:06,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2022-09-20 23:07:06,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2022-09-20 23:07:06,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 5277 transitions. [2022-09-20 23:07:06,890 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.6057162534435262 [2022-09-20 23:07:06,890 INFO L72 ComplementDD]: Start complementDD. Operand 99 states and 5277 transitions. [2022-09-20 23:07:06,890 INFO L73 IsDeterministic]: Start isDeterministic. Operand 99 states and 5277 transitions. [2022-09-20 23:07:06,891 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 23:07:06,891 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 99 states and 5277 transitions. [2022-09-20 23:07:06,896 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 100 states, 99 states have (on average 53.303030303030305) internal successors, (5277), 99 states have internal predecessors, (5277), 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) [2022-09-20 23:07:06,902 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 100 states, 100 states have (on average 88.0) internal successors, (8800), 100 states have internal predecessors, (8800), 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) [2022-09-20 23:07:06,903 INFO L81 ComplementDD]: Finished complementDD. Result has 100 states, 100 states have (on average 88.0) internal successors, (8800), 100 states have internal predecessors, (8800), 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) [2022-09-20 23:07:06,903 INFO L175 Difference]: Start difference. First operand has 434 places, 1011 transitions, 12721 flow. Second operand 99 states and 5277 transitions. [2022-09-20 23:07:06,903 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 498 places, 1806 transitions, 27495 flow [2022-09-20 23:07:07,725 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 448 places, 1806 transitions, 25196 flow, removed 1063 selfloop flow, removed 50 redundant places. [2022-09-20 23:07:07,747 INFO L231 Difference]: Finished difference. Result has 502 places, 1409 transitions, 20640 flow [2022-09-20 23:07:07,748 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=11673, PETRI_DIFFERENCE_MINUEND_PLACES=350, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1011, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=427, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=480, PETRI_DIFFERENCE_SUBTRAHEND_STATES=99, PETRI_FLOW=20640, PETRI_PLACES=502, PETRI_TRANSITIONS=1409} [2022-09-20 23:07:07,749 INFO L287 CegarLoopForPetriNet]: 78 programPoint places, 424 predicate places. [2022-09-20 23:07:07,749 INFO L495 AbstractCegarLoop]: Abstraction has has 502 places, 1409 transitions, 20640 flow [2022-09-20 23:07:07,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 51.142857142857146) internal successors, (1790), 35 states have internal predecessors, (1790), 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) [2022-09-20 23:07:07,749 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 23:07:07,749 INFO L208 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] [2022-09-20 23:07:07,767 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-09-20 23:07:07,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 23:07:07,963 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 23:07:07,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 23:07:07,964 INFO L85 PathProgramCache]: Analyzing trace with hash -1272185280, now seen corresponding path program 4 times [2022-09-20 23:07:07,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 23:07:07,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544185188] [2022-09-20 23:07:07,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 23:07:07,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 23:07:07,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 23:07:12,298 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 23:07:12,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 23:07:12,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544185188] [2022-09-20 23:07:12,299 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544185188] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 23:07:12,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889060881] [2022-09-20 23:07:12,299 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-09-20 23:07:12,299 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 23:07:12,299 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 23:07:12,300 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) [2022-09-20 23:07:12,301 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-09-20 23:07:12,552 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-09-20 23:07:12,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-09-20 23:07:12,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 28 conjunts are in the unsatisfiable core [2022-09-20 23:07:12,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 23:07:13,875 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 23:07:13,875 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-20 23:07:19,508 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 23:07:19,508 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1889060881] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-20 23:07:19,508 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-20 23:07:19,508 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 37 [2022-09-20 23:07:19,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773179746] [2022-09-20 23:07:19,509 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-20 23:07:19,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-09-20 23:07:19,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 23:07:19,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-09-20 23:07:19,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=1117, Unknown=2, NotChecked=0, Total=1332 [2022-09-20 23:07:19,511 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 88 [2022-09-20 23:07:19,512 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 502 places, 1409 transitions, 20640 flow. Second operand has 37 states, 37 states have (on average 53.08108108108108) internal successors, (1964), 37 states have internal predecessors, (1964), 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) [2022-09-20 23:07:19,512 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 23:07:19,512 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 88 [2022-09-20 23:07:19,512 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 23:08:00,794 INFO L130 PetriNetUnfolder]: 2595/6611 cut-off events. [2022-09-20 23:08:00,795 INFO L131 PetriNetUnfolder]: For 129784/129898 co-relation queries the response was YES. [2022-09-20 23:08:00,881 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49515 conditions, 6611 events. 2595/6611 cut-off events. For 129784/129898 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 60675 event pairs, 40 based on Foata normal form. 53/6644 useless extension candidates. Maximal degree in co-relation 49367. Up to 2102 conditions per place. [2022-09-20 23:08:00,924 INFO L137 encePairwiseOnDemand]: 69/88 looper letters, 908 selfloop transitions, 838 changer transitions 73/1935 dead transitions. [2022-09-20 23:08:00,924 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 547 places, 1935 transitions, 33193 flow [2022-09-20 23:08:00,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-09-20 23:08:00,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2022-09-20 23:08:00,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 4150 transitions. [2022-09-20 23:08:00,927 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.6205143540669856 [2022-09-20 23:08:00,927 INFO L72 ComplementDD]: Start complementDD. Operand 76 states and 4150 transitions. [2022-09-20 23:08:00,927 INFO L73 IsDeterministic]: Start isDeterministic. Operand 76 states and 4150 transitions. [2022-09-20 23:08:00,928 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 23:08:00,928 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 76 states and 4150 transitions. [2022-09-20 23:08:00,932 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 77 states, 76 states have (on average 54.60526315789474) internal successors, (4150), 76 states have internal predecessors, (4150), 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) [2022-09-20 23:08:00,936 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 77 states, 77 states have (on average 88.0) internal successors, (6776), 77 states have internal predecessors, (6776), 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) [2022-09-20 23:08:00,937 INFO L81 ComplementDD]: Finished complementDD. Result has 77 states, 77 states have (on average 88.0) internal successors, (6776), 77 states have internal predecessors, (6776), 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) [2022-09-20 23:08:00,937 INFO L175 Difference]: Start difference. First operand has 502 places, 1409 transitions, 20640 flow. Second operand 76 states and 4150 transitions. [2022-09-20 23:08:00,937 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 547 places, 1935 transitions, 33193 flow [2022-09-20 23:08:02,130 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 513 places, 1935 transitions, 31432 flow, removed 829 selfloop flow, removed 34 redundant places. [2022-09-20 23:08:02,158 INFO L231 Difference]: Finished difference. Result has 547 places, 1697 transitions, 27391 flow [2022-09-20 23:08:02,159 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=19527, PETRI_DIFFERENCE_MINUEND_PLACES=438, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1409, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=589, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=746, PETRI_DIFFERENCE_SUBTRAHEND_STATES=76, PETRI_FLOW=27391, PETRI_PLACES=547, PETRI_TRANSITIONS=1697} [2022-09-20 23:08:02,160 INFO L287 CegarLoopForPetriNet]: 78 programPoint places, 469 predicate places. [2022-09-20 23:08:02,160 INFO L495 AbstractCegarLoop]: Abstraction has has 547 places, 1697 transitions, 27391 flow [2022-09-20 23:08:02,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 53.08108108108108) internal successors, (1964), 37 states have internal predecessors, (1964), 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) [2022-09-20 23:08:02,175 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 23:08:02,175 INFO L208 CegarLoopForPetriNet]: trace histogram [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] [2022-09-20 23:08:02,192 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-09-20 23:08:02,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 23:08:02,392 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 23:08:02,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 23:08:02,392 INFO L85 PathProgramCache]: Analyzing trace with hash -509779632, now seen corresponding path program 5 times [2022-09-20 23:08:02,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 23:08:02,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539368713] [2022-09-20 23:08:02,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 23:08:02,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 23:08:02,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 23:08:03,144 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 23:08:03,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 23:08:03,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539368713] [2022-09-20 23:08:03,145 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539368713] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 23:08:03,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338577552] [2022-09-20 23:08:03,145 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-09-20 23:08:03,145 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 23:08:03,145 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 23:08:03,146 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) [2022-09-20 23:08:03,147 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-09-20 23:08:03,244 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-09-20 23:08:03,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-09-20 23:08:03,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 37 conjunts are in the unsatisfiable core [2022-09-20 23:08:03,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 23:08:04,362 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 23:08:04,363 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-20 23:08:07,587 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 23:08:07,588 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1338577552] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-20 23:08:07,588 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-20 23:08:07,588 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 21, 20] total 48 [2022-09-20 23:08:07,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241022927] [2022-09-20 23:08:07,588 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-20 23:08:07,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-09-20 23:08:07,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 23:08:07,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-09-20 23:08:07,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=393, Invalid=1863, Unknown=0, NotChecked=0, Total=2256 [2022-09-20 23:08:07,590 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 88 [2022-09-20 23:08:07,591 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 547 places, 1697 transitions, 27391 flow. Second operand has 48 states, 48 states have (on average 50.895833333333336) internal successors, (2443), 48 states have internal predecessors, (2443), 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) [2022-09-20 23:08:07,592 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 23:08:07,592 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 88 [2022-09-20 23:08:07,592 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 23:08:49,429 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse10 (+ c_~m~0 1)) (.cse9 (mod (+ c_~S~0 c_~T~0) 4294967296))) (let ((.cse0 (= (mod c_~m~0 4294967296) .cse9)) (.cse3 (* (div (+ c_~S~0 (- 4294967294)) 4294967296) 4294967296)) (.cse4 (+ (* (div (+ c_~S~0 2) 4294967296) 4294967296) c_~m~0)) (.cse1 (let ((.cse11 (+ c_~s~0 1))) (< (* 4294967296 (div .cse11 4294967296)) .cse11))) (.cse5 (* (div (+ c_~m~0 (- 4294967295)) 4294967296) 4294967296)) (.cse2 (* (div .cse10 4294967296) 4294967296)) (.cse6 (* (div c_~m~0 4294967296) 4294967296)) (.cse7 (* 4294967296 (div (+ c_~m~0 (- 4294967296)) 4294967296))) (.cse8 (< 0 (mod (+ c_~s~0 2) 4294967296)))) (and (or .cse0 (not (<= (mod c_thread2Thread1of1ForFork0_~cond~1 256) 0))) (or .cse1 (and (< (+ c_~S~0 .cse2) (+ c_~m~0 .cse3 4294967296)) (< .cse4 (+ c_~S~0 .cse5 4294967298)))) (or (< 0 (mod c_~t~0 4294967296)) .cse0 (< 0 (mod c_~s~0 4294967296))) (or (and (< (+ c_~S~0 .cse6) (+ c_~m~0 4294967295 .cse3)) (< .cse4 (+ c_~S~0 .cse7 4294967299))) .cse8) (or (< 0 (mod (+ c_~t~0 4294967294) 4294967296)) (and (or .cse1 (and (< c_~m~0 (+ .cse9 .cse5 4294967296)) (< (+ .cse9 .cse2) (+ c_~m~0 2)))) (or (and (< (+ .cse9 .cse6) .cse10) (< c_~m~0 (+ .cse9 4294967297 .cse7))) .cse8)))))) is different from false [2022-09-20 23:10:57,091 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-09-20 23:11:25,782 INFO L130 PetriNetUnfolder]: 4998/12587 cut-off events. [2022-09-20 23:11:25,783 INFO L131 PetriNetUnfolder]: For 238515/238515 co-relation queries the response was YES. [2022-09-20 23:11:26,017 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95463 conditions, 12587 events. 4998/12587 cut-off events. For 238515/238515 co-relation queries the response was YES. Maximal size of possible extension queue 730. Compared 125749 event pairs, 37 based on Foata normal form. 30/12610 useless extension candidates. Maximal degree in co-relation 95305. Up to 2755 conditions per place. [2022-09-20 23:11:26,113 INFO L137 encePairwiseOnDemand]: 64/88 looper letters, 1673 selfloop transitions, 2415 changer transitions 316/4443 dead transitions. [2022-09-20 23:11:26,113 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 830 places, 4443 transitions, 80627 flow [2022-09-20 23:11:26,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 303 states. [2022-09-20 23:11:26,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 303 states. [2022-09-20 23:11:26,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 15971 transitions. [2022-09-20 23:11:26,178 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.598972397239724 [2022-09-20 23:11:26,178 INFO L72 ComplementDD]: Start complementDD. Operand 303 states and 15971 transitions. [2022-09-20 23:11:26,178 INFO L73 IsDeterministic]: Start isDeterministic. Operand 303 states and 15971 transitions. [2022-09-20 23:11:26,180 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 23:11:26,180 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 303 states and 15971 transitions. [2022-09-20 23:11:26,195 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 304 states, 303 states have (on average 52.70957095709571) internal successors, (15971), 303 states have internal predecessors, (15971), 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) [2022-09-20 23:11:26,215 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 304 states, 304 states have (on average 88.0) internal successors, (26752), 304 states have internal predecessors, (26752), 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) [2022-09-20 23:11:26,217 INFO L81 ComplementDD]: Finished complementDD. Result has 304 states, 304 states have (on average 88.0) internal successors, (26752), 304 states have internal predecessors, (26752), 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) [2022-09-20 23:11:26,217 INFO L175 Difference]: Start difference. First operand has 547 places, 1697 transitions, 27391 flow. Second operand 303 states and 15971 transitions. [2022-09-20 23:11:26,217 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 830 places, 4443 transitions, 80627 flow [2022-09-20 23:11:29,618 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 784 places, 4443 transitions, 78308 flow, removed 882 selfloop flow, removed 46 redundant places. [2022-09-20 23:11:29,680 INFO L231 Difference]: Finished difference. Result has 941 places, 3497 transitions, 67003 flow [2022-09-20 23:11:29,681 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=26720, PETRI_DIFFERENCE_MINUEND_PLACES=482, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1697, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=885, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=563, PETRI_DIFFERENCE_SUBTRAHEND_STATES=303, PETRI_FLOW=67003, PETRI_PLACES=941, PETRI_TRANSITIONS=3497} [2022-09-20 23:11:29,682 INFO L287 CegarLoopForPetriNet]: 78 programPoint places, 863 predicate places. [2022-09-20 23:11:29,682 INFO L495 AbstractCegarLoop]: Abstraction has has 941 places, 3497 transitions, 67003 flow [2022-09-20 23:11:29,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 50.895833333333336) internal successors, (2443), 48 states have internal predecessors, (2443), 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) [2022-09-20 23:11:29,683 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 23:11:29,683 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 23:11:29,699 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-09-20 23:11:29,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 23:11:29,883 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 23:11:29,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 23:11:29,884 INFO L85 PathProgramCache]: Analyzing trace with hash -469137661, now seen corresponding path program 6 times [2022-09-20 23:11:29,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 23:11:29,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203793498] [2022-09-20 23:11:29,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 23:11:29,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 23:11:29,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 23:11:30,599 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 23:11:30,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 23:11:30,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203793498] [2022-09-20 23:11:30,599 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203793498] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 23:11:30,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301432025] [2022-09-20 23:11:30,599 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-09-20 23:11:30,599 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 23:11:30,600 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 23:11:30,600 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) [2022-09-20 23:11:30,601 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-09-20 23:11:30,727 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-09-20 23:11:30,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-09-20 23:11:30,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 29 conjunts are in the unsatisfiable core [2022-09-20 23:11:30,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 23:11:31,759 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 23:11:31,759 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-20 23:11:35,112 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 23:11:35,112 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1301432025] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-20 23:11:35,112 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-20 23:11:35,112 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 18, 18] total 38 [2022-09-20 23:11:35,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151217892] [2022-09-20 23:11:35,112 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-20 23:11:35,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-09-20 23:11:35,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 23:11:35,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-09-20 23:11:35,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=240, Invalid=1166, Unknown=0, NotChecked=0, Total=1406 [2022-09-20 23:11:35,114 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 88 [2022-09-20 23:11:35,115 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 941 places, 3497 transitions, 67003 flow. Second operand has 38 states, 38 states have (on average 53.31578947368421) internal successors, (2026), 38 states have internal predecessors, (2026), 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) [2022-09-20 23:11:35,115 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 23:11:35,115 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 88 [2022-09-20 23:11:35,115 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 23:12:21,816 INFO L130 PetriNetUnfolder]: 5917/14772 cut-off events. [2022-09-20 23:12:21,817 INFO L131 PetriNetUnfolder]: For 418546/418644 co-relation queries the response was YES. [2022-09-20 23:12:22,366 INFO L83 FinitePrefix]: Finished finitePrefix Result has 134735 conditions, 14772 events. 5917/14772 cut-off events. For 418546/418644 co-relation queries the response was YES. Maximal size of possible extension queue 866. Compared 151590 event pairs, 20 based on Foata normal form. 47/14802 useless extension candidates. Maximal degree in co-relation 134440. Up to 4152 conditions per place. [2022-09-20 23:12:22,620 INFO L137 encePairwiseOnDemand]: 69/88 looper letters, 2040 selfloop transitions, 2358 changer transitions 97/4867 dead transitions. [2022-09-20 23:12:22,621 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 922 places, 4867 transitions, 107453 flow [2022-09-20 23:12:22,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-09-20 23:12:22,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2022-09-20 23:12:22,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 5003 transitions. [2022-09-20 23:12:22,624 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.6247502497502497 [2022-09-20 23:12:22,624 INFO L72 ComplementDD]: Start complementDD. Operand 91 states and 5003 transitions. [2022-09-20 23:12:22,624 INFO L73 IsDeterministic]: Start isDeterministic. Operand 91 states and 5003 transitions. [2022-09-20 23:12:22,625 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 23:12:22,625 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 91 states and 5003 transitions. [2022-09-20 23:12:22,630 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 92 states, 91 states have (on average 54.97802197802198) internal successors, (5003), 91 states have internal predecessors, (5003), 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) [2022-09-20 23:12:22,634 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 92 states, 92 states have (on average 88.0) internal successors, (8096), 92 states have internal predecessors, (8096), 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) [2022-09-20 23:12:22,635 INFO L81 ComplementDD]: Finished complementDD. Result has 92 states, 92 states have (on average 88.0) internal successors, (8096), 92 states have internal predecessors, (8096), 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) [2022-09-20 23:12:22,635 INFO L175 Difference]: Start difference. First operand has 941 places, 3497 transitions, 67003 flow. Second operand 91 states and 5003 transitions. [2022-09-20 23:12:22,635 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 922 places, 4867 transitions, 107453 flow [2022-09-20 23:12:34,780 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 803 places, 4867 transitions, 97530 flow, removed 4843 selfloop flow, removed 119 redundant places. [2022-09-20 23:12:34,864 INFO L231 Difference]: Finished difference. Result has 844 places, 4298 transitions, 87463 flow [2022-09-20 23:12:34,867 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=62092, PETRI_DIFFERENCE_MINUEND_PLACES=713, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3497, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1689, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1656, PETRI_DIFFERENCE_SUBTRAHEND_STATES=91, PETRI_FLOW=87463, PETRI_PLACES=844, PETRI_TRANSITIONS=4298} [2022-09-20 23:12:34,868 INFO L287 CegarLoopForPetriNet]: 78 programPoint places, 766 predicate places. [2022-09-20 23:12:34,868 INFO L495 AbstractCegarLoop]: Abstraction has has 844 places, 4298 transitions, 87463 flow [2022-09-20 23:12:34,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 53.31578947368421) internal successors, (2026), 38 states have internal predecessors, (2026), 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) [2022-09-20 23:12:34,868 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 23:12:34,868 INFO L208 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] [2022-09-20 23:12:34,888 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-09-20 23:12:35,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 23:12:35,085 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 23:12:35,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 23:12:35,085 INFO L85 PathProgramCache]: Analyzing trace with hash 1222068447, now seen corresponding path program 7 times [2022-09-20 23:12:35,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 23:12:35,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392720064] [2022-09-20 23:12:35,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 23:12:35,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 23:12:35,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 23:12:36,486 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 23:12:36,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 23:12:36,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392720064] [2022-09-20 23:12:36,486 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392720064] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 23:12:36,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842252911] [2022-09-20 23:12:36,486 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-09-20 23:12:36,487 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 23:12:36,487 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 23:12:36,488 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) [2022-09-20 23:12:36,488 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-09-20 23:12:36,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 23:12:36,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 38 conjunts are in the unsatisfiable core [2022-09-20 23:12:36,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 23:12:37,956 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 23:12:37,957 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-20 23:12:42,815 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 23:12:42,815 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1842252911] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-20 23:12:42,815 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-20 23:12:42,815 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 23, 21] total 51 [2022-09-20 23:12:42,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73959424] [2022-09-20 23:12:42,816 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-20 23:12:42,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-09-20 23:12:42,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 23:12:42,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-09-20 23:12:42,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=366, Invalid=2184, Unknown=0, NotChecked=0, Total=2550 [2022-09-20 23:12:42,818 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 88 [2022-09-20 23:12:42,819 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 844 places, 4298 transitions, 87463 flow. Second operand has 51 states, 51 states have (on average 50.90196078431372) internal successors, (2596), 51 states have internal predecessors, (2596), 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) [2022-09-20 23:12:42,819 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 23:12:42,819 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 88 [2022-09-20 23:12:42,819 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 23:12:52,773 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-09-20 23:12:54,778 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-09-20 23:13:00,728 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.40s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-09-20 23:14:54,749 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.42s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-09-20 23:15:47,491 INFO L130 PetriNetUnfolder]: 8208/20745 cut-off events. [2022-09-20 23:15:47,491 INFO L131 PetriNetUnfolder]: For 498284/498304 co-relation queries the response was YES. [2022-09-20 23:15:48,088 INFO L83 FinitePrefix]: Finished finitePrefix Result has 188606 conditions, 20745 events. 8208/20745 cut-off events. For 498284/498304 co-relation queries the response was YES. Maximal size of possible extension queue 1086. Compared 225182 event pairs, 33 based on Foata normal form. 33/20768 useless extension candidates. Maximal degree in co-relation 188364. Up to 4839 conditions per place. [2022-09-20 23:15:48,270 INFO L137 encePairwiseOnDemand]: 65/88 looper letters, 2309 selfloop transitions, 4984 changer transitions 237/7569 dead transitions. [2022-09-20 23:15:48,270 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1073 places, 7569 transitions, 173387 flow [2022-09-20 23:15:48,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 249 states. [2022-09-20 23:15:48,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 249 states. [2022-09-20 23:15:48,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 13089 transitions. [2022-09-20 23:15:48,278 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.5973439211391018 [2022-09-20 23:15:48,278 INFO L72 ComplementDD]: Start complementDD. Operand 249 states and 13089 transitions. [2022-09-20 23:15:48,278 INFO L73 IsDeterministic]: Start isDeterministic. Operand 249 states and 13089 transitions. [2022-09-20 23:15:48,279 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 23:15:48,279 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 249 states and 13089 transitions. [2022-09-20 23:15:48,291 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 250 states, 249 states have (on average 52.566265060240966) internal successors, (13089), 249 states have internal predecessors, (13089), 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) [2022-09-20 23:15:48,304 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 250 states, 250 states have (on average 88.0) internal successors, (22000), 250 states have internal predecessors, (22000), 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) [2022-09-20 23:15:48,306 INFO L81 ComplementDD]: Finished complementDD. Result has 250 states, 250 states have (on average 88.0) internal successors, (22000), 250 states have internal predecessors, (22000), 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) [2022-09-20 23:15:48,306 INFO L175 Difference]: Start difference. First operand has 844 places, 4298 transitions, 87463 flow. Second operand 249 states and 13089 transitions. [2022-09-20 23:15:48,306 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1073 places, 7569 transitions, 173387 flow [2022-09-20 23:16:03,162 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1039 places, 7569 transitions, 170109 flow, removed 1504 selfloop flow, removed 34 redundant places. [2022-09-20 23:16:03,304 INFO L231 Difference]: Finished difference. Result has 1172 places, 6483 transitions, 154038 flow [2022-09-20 23:16:03,308 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=85698, PETRI_DIFFERENCE_MINUEND_PLACES=791, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4298, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3065, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=946, PETRI_DIFFERENCE_SUBTRAHEND_STATES=249, PETRI_FLOW=154038, PETRI_PLACES=1172, PETRI_TRANSITIONS=6483} [2022-09-20 23:16:03,310 INFO L287 CegarLoopForPetriNet]: 78 programPoint places, 1094 predicate places. [2022-09-20 23:16:03,310 INFO L495 AbstractCegarLoop]: Abstraction has has 1172 places, 6483 transitions, 154038 flow [2022-09-20 23:16:03,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 50.90196078431372) internal successors, (2596), 51 states have internal predecessors, (2596), 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) [2022-09-20 23:16:03,310 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 23:16:03,310 INFO L208 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] [2022-09-20 23:16:03,327 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-09-20 23:16:03,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-09-20 23:16:03,529 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 23:16:03,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 23:16:03,529 INFO L85 PathProgramCache]: Analyzing trace with hash 1567343625, now seen corresponding path program 8 times [2022-09-20 23:16:03,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 23:16:03,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882138991] [2022-09-20 23:16:03,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 23:16:03,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 23:16:03,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 23:16:04,548 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 23:16:04,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 23:16:04,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882138991] [2022-09-20 23:16:04,548 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882138991] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 23:16:04,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [69849509] [2022-09-20 23:16:04,548 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-09-20 23:16:04,548 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 23:16:04,548 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 23:16:04,549 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) [2022-09-20 23:16:04,550 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-09-20 23:16:04,678 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-09-20 23:16:04,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-09-20 23:16:04,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 37 conjunts are in the unsatisfiable core [2022-09-20 23:16:04,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 23:16:06,833 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 23:16:06,833 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-20 23:16:11,465 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 23:16:11,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [69849509] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-20 23:16:11,466 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-20 23:16:11,466 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 21, 21] total 49 [2022-09-20 23:16:11,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591371466] [2022-09-20 23:16:11,466 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-20 23:16:11,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-09-20 23:16:11,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 23:16:11,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-09-20 23:16:11,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=347, Invalid=2005, Unknown=0, NotChecked=0, Total=2352 [2022-09-20 23:16:11,468 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 88 [2022-09-20 23:16:11,469 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1172 places, 6483 transitions, 154038 flow. Second operand has 49 states, 49 states have (on average 50.97959183673469) internal successors, (2498), 49 states have internal predecessors, (2498), 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) [2022-09-20 23:16:11,469 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 23:16:11,469 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 88 [2022-09-20 23:16:11,469 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 23:16:20,224 WARN L233 SmtUtils]: Spent 5.52s on a formula simplification. DAG size of input: 137 DAG size of output: 133 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-09-20 23:16:27,960 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-09-20 23:16:30,479 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.55s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-09-20 23:16:43,740 WARN L233 SmtUtils]: Spent 5.20s on a formula simplification. DAG size of input: 180 DAG size of output: 150 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-09-20 23:16:52,882 WARN L233 SmtUtils]: Spent 5.82s on a formula simplification. DAG size of input: 152 DAG size of output: 108 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-09-20 23:17:45,857 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-09-20 23:17:53,293 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-09-20 23:18:26,349 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-09-20 23:19:37,727 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] Received shutdown request... [2022-09-20 23:19:44,243 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-09-20 23:19:44,244 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 [2022-09-20 23:19:44,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 134 states. [2022-09-20 23:19:44,351 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2022-09-20 23:19:44,367 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-09-20 23:19:44,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 23:19:44,565 WARN L619 AbstractCegarLoop]: Verification canceled: while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (49states, 49/88 universal loopers) in iteration 12,while PetriNetUnfolder was constructing finite prefix that currently has 33480 conditions, 3216 events (1178/3215 cut-off events. For 98663/98668 co-relation queries the response was YES. Maximal size of possible extension queue 734. Compared 33198 event pairs, 5 based on Foata normal form. 4/3953 useless extension candidates. Maximal degree in co-relation 33121. Up to 563 conditions per place.). [2022-09-20 23:19:44,566 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2022-09-20 23:19:44,567 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2022-09-20 23:19:44,568 INFO L444 BasicCegarLoop]: Path program histogram: [8, 2, 1, 1] [2022-09-20 23:19:44,570 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-09-20 23:19:44,570 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-09-20 23:19:44,572 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.09 11:19:44 BasicIcfg [2022-09-20 23:19:44,572 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-09-20 23:19:44,573 INFO L158 Benchmark]: Toolchain (without parser) took 843575.79ms. Allocated memory was 222.3MB in the beginning and 3.8GB in the end (delta: 3.6GB). Free memory was 166.7MB in the beginning and 1.2GB in the end (delta: -998.6MB). Peak memory consumption was 2.6GB. Max. memory is 8.0GB. [2022-09-20 23:19:44,573 INFO L158 Benchmark]: CDTParser took 0.19ms. Allocated memory is still 222.3MB. Free memory was 183.5MB in the beginning and 183.4MB in the end (delta: 143.3kB). There was no memory consumed. Max. memory is 8.0GB. [2022-09-20 23:19:44,573 INFO L158 Benchmark]: CACSL2BoogieTranslator took 254.01ms. Allocated memory is still 222.3MB. Free memory was 166.6MB in the beginning and 195.5MB in the end (delta: -28.9MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. [2022-09-20 23:19:44,573 INFO L158 Benchmark]: Boogie Procedure Inliner took 43.60ms. Allocated memory is still 222.3MB. Free memory was 195.5MB in the beginning and 193.9MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-09-20 23:19:44,573 INFO L158 Benchmark]: Boogie Preprocessor took 32.41ms. Allocated memory is still 222.3MB. Free memory was 193.9MB in the beginning and 192.5MB in the end (delta: 1.4MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-09-20 23:19:44,574 INFO L158 Benchmark]: RCFGBuilder took 310.51ms. Allocated memory is still 222.3MB. Free memory was 192.5MB in the beginning and 178.9MB in the end (delta: 13.6MB). Peak memory consumption was 13.6MB. Max. memory is 8.0GB. [2022-09-20 23:19:44,574 INFO L158 Benchmark]: TraceAbstraction took 842929.30ms. Allocated memory was 222.3MB in the beginning and 3.8GB in the end (delta: 3.6GB). Free memory was 178.3MB in the beginning and 1.2GB in the end (delta: -987.0MB). Peak memory consumption was 2.6GB. Max. memory is 8.0GB. [2022-09-20 23:19:44,575 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19ms. Allocated memory is still 222.3MB. Free memory was 183.5MB in the beginning and 183.4MB in the end (delta: 143.3kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 254.01ms. Allocated memory is still 222.3MB. Free memory was 166.6MB in the beginning and 195.5MB in the end (delta: -28.9MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 43.60ms. Allocated memory is still 222.3MB. Free memory was 195.5MB in the beginning and 193.9MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 32.41ms. Allocated memory is still 222.3MB. Free memory was 193.9MB in the beginning and 192.5MB in the end (delta: 1.4MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 310.51ms. Allocated memory is still 222.3MB. Free memory was 192.5MB in the beginning and 178.9MB in the end (delta: 13.6MB). Peak memory consumption was 13.6MB. Max. memory is 8.0GB. * TraceAbstraction took 842929.30ms. Allocated memory was 222.3MB in the beginning and 3.8GB in the end (delta: 3.6GB). Free memory was 178.3MB in the beginning and 1.2GB in the end (delta: -987.0MB). Peak memory consumption was 2.6GB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 95]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (49states, 49/88 universal loopers) in iteration 12,while PetriNetUnfolder was constructing finite prefix that currently has 33480 conditions, 3216 events (1178/3215 cut-off events. For 98663/98668 co-relation queries the response was YES. Maximal size of possible extension queue 734. Compared 33198 event pairs, 5 based on Foata normal form. 4/3953 useless extension candidates. Maximal degree in co-relation 33121. Up to 563 conditions per place.). - TimeoutResultAtElement [Line: 89]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (49states, 49/88 universal loopers) in iteration 12,while PetriNetUnfolder was constructing finite prefix that currently has 33480 conditions, 3216 events (1178/3215 cut-off events. For 98663/98668 co-relation queries the response was YES. Maximal size of possible extension queue 734. Compared 33198 event pairs, 5 based on Foata normal form. 4/3953 useless extension candidates. Maximal degree in co-relation 33121. Up to 563 conditions per place.). - TimeoutResultAtElement [Line: 90]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (49states, 49/88 universal loopers) in iteration 12,while PetriNetUnfolder was constructing finite prefix that currently has 33480 conditions, 3216 events (1178/3215 cut-off events. For 98663/98668 co-relation queries the response was YES. Maximal size of possible extension queue 734. Compared 33198 event pairs, 5 based on Foata normal form. 4/3953 useless extension candidates. Maximal degree in co-relation 33121. Up to 563 conditions per place.). - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 100 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: 842.8s, OverallIterations: 12, TraceHistogramMax: 3, PathProgramHistogramMax: 8, EmptinessCheckTime: 0.0s, AutomataDifference: 788.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, HoareTripleCheckerStatistics: 5 mSolverCounterUnknown, 5794 SdHoareTripleChecker+Valid, 115.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 5794 mSDsluCounter, 4001 SdHoareTripleChecker+Invalid, 111.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 88 IncrementalHoareTripleChecker+Unchecked, 6081 mSDsCounter, 2022 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 20870 IncrementalHoareTripleChecker+Invalid, 22985 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 2022 mSolverCounterUnsat, 244 mSDtfsCounter, 20870 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2591 GetRequests, 1132 SyntacticMatches, 20 SemanticMatches, 1439 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 112727 ImplicationChecksByTransitivity, 602.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=154038occurred in iteration=11, InterpolantAutomatonStates: 1136, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 1.4s SatisfiabilityAnalysisTime, 50.5s InterpolantComputationTime, 1544 NumberOfCodeBlocks, 1544 NumberOfCodeBlocksAsserted, 31 NumberOfCheckSat, 2186 ConstructedInterpolants, 13 QuantifiedInterpolants, 62350 SizeOfPredicates, 137 NumberOfNonLiveVariables, 1507 ConjunctsInSsa, 277 ConjunctsInUnsatCore, 30 InterpolantComputations, 3 PerfectInterpolantSequences, 7/207 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