/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-NoLbe-Before.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-dev-bf34d27 [2022-01-19 07:54:32,573 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-19 07:54:32,605 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-19 07:54:32,622 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-19 07:54:32,622 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-19 07:54:32,622 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-19 07:54:32,623 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-19 07:54:32,625 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-19 07:54:32,626 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-19 07:54:32,626 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-19 07:54:32,627 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-19 07:54:32,627 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-19 07:54:32,628 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-19 07:54:32,628 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-19 07:54:32,629 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-19 07:54:32,630 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-19 07:54:32,630 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-19 07:54:32,631 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-19 07:54:32,632 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-19 07:54:32,633 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-19 07:54:32,634 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-19 07:54:32,635 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-19 07:54:32,636 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-19 07:54:32,636 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-19 07:54:32,638 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-01-19 07:54:32,638 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-01-19 07:54:32,638 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-01-19 07:54:32,639 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-01-19 07:54:32,639 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-01-19 07:54:32,640 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-01-19 07:54:32,640 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-19 07:54:32,640 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-19 07:54:32,641 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-19 07:54:32,641 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-19 07:54:32,642 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-19 07:54:32,642 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-19 07:54:32,642 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-19 07:54:32,643 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-19 07:54:32,643 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-19 07:54:32,643 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-19 07:54:32,644 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-19 07:54:32,649 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-Before.epf [2022-01-19 07:54:32,667 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-19 07:54:32,667 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-19 07:54:32,667 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-19 07:54:32,668 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-19 07:54:32,668 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-19 07:54:32,668 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-19 07:54:32,668 INFO L138 SettingsManager]: * Use SBE=true [2022-01-19 07:54:32,668 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-19 07:54:32,668 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-19 07:54:32,668 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-19 07:54:32,669 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-19 07:54:32,669 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-19 07:54:32,669 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-19 07:54:32,669 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-19 07:54:32,669 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-19 07:54:32,669 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-19 07:54:32,669 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-19 07:54:32,669 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-19 07:54:32,669 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-19 07:54:32,669 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-19 07:54:32,669 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-19 07:54:32,669 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-19 07:54:32,670 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-19 07:54:32,670 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-19 07:54:32,670 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-19 07:54:32,670 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-19 07:54:32,670 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-19 07:54:32,670 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-19 07:54:32,670 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-19 07:54:32,670 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-19 07:54:32,670 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-19 07:54:32,670 INFO L138 SettingsManager]: * When to check the insufficient erros location relative to the other error locations=BEFORE [2022-01-19 07:54:32,671 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-01-19 07:54:32,858 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-19 07:54:32,871 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-19 07:54:32,873 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-19 07:54:32,873 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-19 07:54:32,874 INFO L275 PluginConnector]: CDTParser initialized [2022-01-19 07:54:32,875 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-bad-threaded-sum-2.wvr.c [2022-01-19 07:54:32,913 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ae4589fc9/3228a6e004a9436d87d02b3c754cfeff/FLAGc6dc11048 [2022-01-19 07:54:33,207 INFO L306 CDTParser]: Found 1 translation units. [2022-01-19 07:54:33,207 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-threaded-sum-2.wvr.c [2022-01-19 07:54:33,211 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ae4589fc9/3228a6e004a9436d87d02b3c754cfeff/FLAGc6dc11048 [2022-01-19 07:54:33,645 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ae4589fc9/3228a6e004a9436d87d02b3c754cfeff [2022-01-19 07:54:33,646 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-19 07:54:33,647 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-19 07:54:33,648 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-19 07:54:33,648 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-19 07:54:33,650 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-19 07:54:33,650 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.01 07:54:33" (1/1) ... [2022-01-19 07:54:33,651 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@459075a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 07:54:33, skipping insertion in model container [2022-01-19 07:54:33,651 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.01 07:54:33" (1/1) ... [2022-01-19 07:54:33,655 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-19 07:54:33,672 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-19 07:54:33,803 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] [2022-01-19 07:54:33,807 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-19 07:54:33,812 INFO L203 MainTranslator]: Completed pre-run [2022-01-19 07:54:33,824 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] [2022-01-19 07:54:33,824 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-19 07:54:33,832 INFO L208 MainTranslator]: Completed translation [2022-01-19 07:54:33,832 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 07:54:33 WrapperNode [2022-01-19 07:54:33,832 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-19 07:54:33,833 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-19 07:54:33,833 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-19 07:54:33,833 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-19 07:54:33,837 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 07:54:33" (1/1) ... [2022-01-19 07:54:33,841 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 07:54:33" (1/1) ... [2022-01-19 07:54:33,851 INFO L137 Inliner]: procedures = 21, calls = 34, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 59 [2022-01-19 07:54:33,852 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-19 07:54:33,853 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-19 07:54:33,853 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-19 07:54:33,853 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-19 07:54:33,857 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 07:54:33" (1/1) ... [2022-01-19 07:54:33,858 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 07:54:33" (1/1) ... [2022-01-19 07:54:33,859 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 07:54:33" (1/1) ... [2022-01-19 07:54:33,859 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 07:54:33" (1/1) ... [2022-01-19 07:54:33,862 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 07:54:33" (1/1) ... [2022-01-19 07:54:33,864 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 07:54:33" (1/1) ... [2022-01-19 07:54:33,864 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 07:54:33" (1/1) ... [2022-01-19 07:54:33,866 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-19 07:54:33,866 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-19 07:54:33,866 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-19 07:54:33,866 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-19 07:54:33,867 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 07:54:33" (1/1) ... [2022-01-19 07:54:33,871 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-19 07:54:33,881 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 07:54:33,889 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-01-19 07:54:33,926 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-19 07:54:33,926 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-01-19 07:54:33,926 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-01-19 07:54:33,926 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-01-19 07:54:33,926 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-01-19 07:54:33,926 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-19 07:54:33,926 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-19 07:54:33,926 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-19 07:54:33,926 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-01-19 07:54:33,927 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-01-19 07:54:33,927 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-19 07:54:33,927 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-19 07:54:33,927 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-19 07:54:33,927 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-19 07:54:33,928 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-01-19 07:54:33,919 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-01-19 07:54:33,976 INFO L234 CfgBuilder]: Building ICFG [2022-01-19 07:54:33,977 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-19 07:54:34,107 INFO L275 CfgBuilder]: Performing block encoding [2022-01-19 07:54:34,134 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-19 07:54:34,134 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-01-19 07:54:34,135 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.01 07:54:34 BoogieIcfgContainer [2022-01-19 07:54:34,135 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-19 07:54:34,136 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-19 07:54:34,136 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-19 07:54:34,139 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-19 07:54:34,139 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.01 07:54:33" (1/3) ... [2022-01-19 07:54:34,139 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75d94e20 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.01 07:54:34, skipping insertion in model container [2022-01-19 07:54:34,139 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 07:54:33" (2/3) ... [2022-01-19 07:54:34,139 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75d94e20 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.01 07:54:34, skipping insertion in model container [2022-01-19 07:54:34,140 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.01 07:54:34" (3/3) ... [2022-01-19 07:54:34,140 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-bad-threaded-sum-2.wvr.c [2022-01-19 07:54:34,143 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-19 07:54:34,143 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-19 07:54:34,144 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-01-19 07:54:34,168 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~cond~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 07:54:34,168 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~cond~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 07:54:34,169 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~cond~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 07:54:34,169 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~cond~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 07:54:34,169 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~cond~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 07:54:34,170 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~cond~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 07:54:34,170 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 07:54:34,170 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 07:54:34,170 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 07:54:34,170 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 07:54:34,171 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 07:54:34,171 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 07:54:34,171 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 07:54:34,171 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 07:54:34,172 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 07:54:34,172 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 07:54:34,172 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 07:54:34,172 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 07:54:34,173 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~cond~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 07:54:34,173 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~cond~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 07:54:34,174 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~cond~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 07:54:34,174 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~cond~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 07:54:34,174 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~cond~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 07:54:34,175 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~cond~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 07:54:34,175 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~cond~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 07:54:34,175 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~cond~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 07:54:34,176 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 07:54:34,176 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 07:54:34,176 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 07:54:34,176 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 07:54:34,176 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 07:54:34,177 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 07:54:34,177 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 07:54:34,177 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 07:54:34,177 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~cond~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 07:54:34,178 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~cond~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 07:54:34,180 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 07:54:34,180 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 07:54:34,180 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 07:54:34,180 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 07:54:34,180 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~cond~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 07:54:34,181 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 07:54:34,181 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 07:54:34,181 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 07:54:34,181 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 07:54:34,182 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~cond~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 07:54:34,185 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-01-19 07:54:34,242 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-19 07:54:34,248 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-01-19 07:54:34,248 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-01-19 07:54:34,263 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 89 places, 88 transitions, 192 flow [2022-01-19 07:54:34,297 INFO L129 PetriNetUnfolder]: 6/86 cut-off events. [2022-01-19 07:54:34,297 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-01-19 07:54:34,301 INFO L84 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 41 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. [2022-01-19 07:54:34,302 INFO L82 GeneralOperation]: Start removeDead. Operand has 89 places, 88 transitions, 192 flow [2022-01-19 07:54:34,305 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 78 places, 77 transitions, 166 flow [2022-01-19 07:54:34,326 INFO L129 PetriNetUnfolder]: 6/76 cut-off events. [2022-01-19 07:54:34,326 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-01-19 07:54:34,326 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 07:54:34,327 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 07:54:34,327 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 07:54:34,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 07:54:34,331 INFO L85 PathProgramCache]: Analyzing trace with hash -566801703, now seen corresponding path program 1 times [2022-01-19 07:54:34,346 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 07:54:34,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326335019] [2022-01-19 07:54:34,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 07:54:34,349 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 07:54:34,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 07:54:34,529 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 07:54:34,529 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 07:54:34,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326335019] [2022-01-19 07:54:34,530 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326335019] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 07:54:34,530 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 07:54:34,530 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-19 07:54:34,531 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456813516] [2022-01-19 07:54:34,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 07:54:34,536 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-01-19 07:54:34,536 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 07:54:34,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-01-19 07:54:34,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-19 07:54:34,557 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 88 [2022-01-19 07:54:34,559 INFO L92 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) [2022-01-19 07:54:34,559 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 07:54:34,559 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 88 [2022-01-19 07:54:34,560 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 07:54:34,594 INFO L129 PetriNetUnfolder]: 16/112 cut-off events. [2022-01-19 07:54:34,594 INFO L130 PetriNetUnfolder]: For 27/28 co-relation queries the response was YES. [2022-01-19 07:54:34,594 INFO L84 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 175 event pairs, 5 based on Foata normal form. 14/114 useless extension candidates. Maximal degree in co-relation 82. Up to 27 conditions per place. [2022-01-19 07:54:34,596 INFO L132 encePairwiseOnDemand]: 84/88 looper letters, 7 selfloop transitions, 0 changer transitions 2/73 dead transitions. [2022-01-19 07:54:34,596 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 73 transitions, 172 flow [2022-01-19 07:54:34,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-01-19 07:54:34,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-01-19 07:54:34,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 163 transitions. [2022-01-19 07:54:34,605 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9261363636363636 [2022-01-19 07:54:34,605 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 163 transitions. [2022-01-19 07:54:34,606 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 163 transitions. [2022-01-19 07:54:34,606 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 07:54:34,608 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 163 transitions. [2022-01-19 07:54:34,609 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) [2022-01-19 07:54:34,611 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) [2022-01-19 07:54:34,612 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) [2022-01-19 07:54:34,613 INFO L186 Difference]: Start difference. First operand has 78 places, 77 transitions, 166 flow. Second operand 2 states and 163 transitions. [2022-01-19 07:54:34,613 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 73 transitions, 172 flow [2022-01-19 07:54:34,615 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 73 transitions, 164 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-01-19 07:54:34,617 INFO L242 Difference]: Finished difference. Result has 75 places, 71 transitions, 146 flow [2022-01-19 07:54:34,618 INFO L317 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} [2022-01-19 07:54:34,620 INFO L334 CegarLoopForPetriNet]: 78 programPoint places, -3 predicate places. [2022-01-19 07:54:34,620 INFO L470 AbstractCegarLoop]: Abstraction has has 75 places, 71 transitions, 146 flow [2022-01-19 07:54:34,621 INFO L471 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) [2022-01-19 07:54:34,621 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 07:54:34,621 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 07:54:34,621 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-19 07:54:34,621 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 07:54:34,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 07:54:34,622 INFO L85 PathProgramCache]: Analyzing trace with hash 693036951, now seen corresponding path program 1 times [2022-01-19 07:54:34,622 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 07:54:34,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750753547] [2022-01-19 07:54:34,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 07:54:34,622 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 07:54:34,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 07:54:34,775 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 07:54:34,775 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 07:54:34,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750753547] [2022-01-19 07:54:34,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750753547] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 07:54:34,776 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 07:54:34,776 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-19 07:54:34,776 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891138517] [2022-01-19 07:54:34,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 07:54:34,777 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-19 07:54:34,777 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 07:54:34,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-19 07:54:34,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-01-19 07:54:34,779 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 88 [2022-01-19 07:54:34,779 INFO L92 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) [2022-01-19 07:54:34,779 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 07:54:34,779 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 88 [2022-01-19 07:54:34,779 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 07:54:34,881 INFO L129 PetriNetUnfolder]: 40/148 cut-off events. [2022-01-19 07:54:34,882 INFO L130 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2022-01-19 07:54:34,882 INFO L84 FinitePrefix]: Finished finitePrefix Result has 246 conditions, 148 events. 40/148 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 369 event pairs, 2 based on Foata normal form. 0/139 useless extension candidates. Maximal degree in co-relation 243. Up to 53 conditions per place. [2022-01-19 07:54:34,883 INFO L132 encePairwiseOnDemand]: 82/88 looper letters, 30 selfloop transitions, 5 changer transitions 0/82 dead transitions. [2022-01-19 07:54:34,883 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 82 transitions, 240 flow [2022-01-19 07:54:34,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-19 07:54:34,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-01-19 07:54:34,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 378 transitions. [2022-01-19 07:54:34,888 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7159090909090909 [2022-01-19 07:54:34,888 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 378 transitions. [2022-01-19 07:54:34,888 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 378 transitions. [2022-01-19 07:54:34,889 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 07:54:34,889 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 378 transitions. [2022-01-19 07:54:34,891 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 63.0) internal successors, (378), 6 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 07:54:34,893 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 88.0) internal successors, (616), 7 states have internal predecessors, (616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 07:54:34,893 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 88.0) internal successors, (616), 7 states have internal predecessors, (616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 07:54:34,893 INFO L186 Difference]: Start difference. First operand has 75 places, 71 transitions, 146 flow. Second operand 6 states and 378 transitions. [2022-01-19 07:54:34,893 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 82 transitions, 240 flow [2022-01-19 07:54:34,910 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 82 transitions, 240 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-01-19 07:54:34,911 INFO L242 Difference]: Finished difference. Result has 79 places, 72 transitions, 164 flow [2022-01-19 07:54:34,911 INFO L317 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=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=164, PETRI_PLACES=79, PETRI_TRANSITIONS=72} [2022-01-19 07:54:34,912 INFO L334 CegarLoopForPetriNet]: 78 programPoint places, 1 predicate places. [2022-01-19 07:54:34,912 INFO L470 AbstractCegarLoop]: Abstraction has has 79 places, 72 transitions, 164 flow [2022-01-19 07:54:34,912 INFO L471 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) [2022-01-19 07:54:34,912 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 07:54:34,912 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 07:54:34,913 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-19 07:54:34,913 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 07:54:34,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 07:54:34,913 INFO L85 PathProgramCache]: Analyzing trace with hash 1648014554, now seen corresponding path program 1 times [2022-01-19 07:54:34,913 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 07:54:34,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772016110] [2022-01-19 07:54:34,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 07:54:34,914 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 07:54:34,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 07:54:35,083 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 07:54:35,083 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 07:54:35,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772016110] [2022-01-19 07:54:35,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772016110] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 07:54:35,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1974327452] [2022-01-19 07:54:35,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 07:54:35,084 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 07:54:35,084 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 07:54:35,085 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 07:54:35,086 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-19 07:54:35,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 07:54:35,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-19 07:54:35,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 07:54:35,384 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-19 07:54:35,384 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-19 07:54:35,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1974327452] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 07:54:35,385 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-19 07:54:35,385 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2022-01-19 07:54:35,385 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988752172] [2022-01-19 07:54:35,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 07:54:35,385 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-19 07:54:35,385 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 07:54:35,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-19 07:54:35,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2022-01-19 07:54:35,387 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 88 [2022-01-19 07:54:35,387 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 72 transitions, 164 flow. Second operand has 6 states, 6 states have (on average 58.0) internal successors, (348), 6 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 07:54:35,387 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 07:54:35,387 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 88 [2022-01-19 07:54:35,387 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 07:54:35,539 INFO L129 PetriNetUnfolder]: 46/175 cut-off events. [2022-01-19 07:54:35,539 INFO L130 PetriNetUnfolder]: For 27/27 co-relation queries the response was YES. [2022-01-19 07:54:35,540 INFO L84 FinitePrefix]: Finished finitePrefix Result has 332 conditions, 175 events. 46/175 cut-off events. For 27/27 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 448 event pairs, 4 based on Foata normal form. 0/167 useless extension candidates. Maximal degree in co-relation 327. Up to 64 conditions per place. [2022-01-19 07:54:35,541 INFO L132 encePairwiseOnDemand]: 80/88 looper letters, 34 selfloop transitions, 8 changer transitions 0/86 dead transitions. [2022-01-19 07:54:35,541 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 86 transitions, 287 flow [2022-01-19 07:54:35,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-19 07:54:35,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-01-19 07:54:35,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 421 transitions. [2022-01-19 07:54:35,543 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6834415584415584 [2022-01-19 07:54:35,543 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 421 transitions. [2022-01-19 07:54:35,543 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 421 transitions. [2022-01-19 07:54:35,543 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 07:54:35,543 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 421 transitions. [2022-01-19 07:54:35,544 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 60.142857142857146) internal successors, (421), 7 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 07:54:35,546 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) [2022-01-19 07:54:35,546 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) [2022-01-19 07:54:35,546 INFO L186 Difference]: Start difference. First operand has 79 places, 72 transitions, 164 flow. Second operand 7 states and 421 transitions. [2022-01-19 07:54:35,546 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 86 transitions, 287 flow [2022-01-19 07:54:35,547 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 86 transitions, 276 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-01-19 07:54:35,548 INFO L242 Difference]: Finished difference. Result has 84 places, 77 transitions, 207 flow [2022-01-19 07:54:35,548 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=207, PETRI_PLACES=84, PETRI_TRANSITIONS=77} [2022-01-19 07:54:35,549 INFO L334 CegarLoopForPetriNet]: 78 programPoint places, 6 predicate places. [2022-01-19 07:54:35,549 INFO L470 AbstractCegarLoop]: Abstraction has has 84 places, 77 transitions, 207 flow [2022-01-19 07:54:35,549 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 58.0) internal successors, (348), 6 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 07:54:35,549 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 07:54:35,549 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 07:54:35,568 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-19 07:54:35,765 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 07:54:35,766 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 07:54:35,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 07:54:35,766 INFO L85 PathProgramCache]: Analyzing trace with hash -1055812012, now seen corresponding path program 2 times [2022-01-19 07:54:35,766 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 07:54:35,767 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684887752] [2022-01-19 07:54:35,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 07:54:35,767 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 07:54:35,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 07:54:35,949 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 07:54:35,950 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 07:54:35,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684887752] [2022-01-19 07:54:35,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684887752] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 07:54:35,953 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 07:54:35,953 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-19 07:54:35,953 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218848683] [2022-01-19 07:54:35,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 07:54:35,955 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-19 07:54:35,955 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 07:54:35,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-19 07:54:35,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-19 07:54:35,957 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 88 [2022-01-19 07:54:35,958 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 77 transitions, 207 flow. Second operand has 6 states, 6 states have (on average 64.16666666666667) internal successors, (385), 6 states have internal predecessors, (385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 07:54:35,958 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 07:54:35,958 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 88 [2022-01-19 07:54:35,958 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 07:54:36,133 INFO L129 PetriNetUnfolder]: 119/358 cut-off events. [2022-01-19 07:54:36,134 INFO L130 PetriNetUnfolder]: For 160/160 co-relation queries the response was YES. [2022-01-19 07:54:36,135 INFO L84 FinitePrefix]: Finished finitePrefix Result has 833 conditions, 358 events. 119/358 cut-off events. For 160/160 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1397 event pairs, 6 based on Foata normal form. 6/358 useless extension candidates. Maximal degree in co-relation 825. Up to 74 conditions per place. [2022-01-19 07:54:36,136 INFO L132 encePairwiseOnDemand]: 78/88 looper letters, 46 selfloop transitions, 28 changer transitions 0/123 dead transitions. [2022-01-19 07:54:36,136 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 123 transitions, 543 flow [2022-01-19 07:54:36,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-19 07:54:36,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-01-19 07:54:36,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 487 transitions. [2022-01-19 07:54:36,140 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7905844155844156 [2022-01-19 07:54:36,140 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 487 transitions. [2022-01-19 07:54:36,141 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 487 transitions. [2022-01-19 07:54:36,141 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 07:54:36,141 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 487 transitions. [2022-01-19 07:54:36,142 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 69.57142857142857) internal successors, (487), 7 states have internal predecessors, (487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 07:54:36,143 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) [2022-01-19 07:54:36,143 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) [2022-01-19 07:54:36,143 INFO L186 Difference]: Start difference. First operand has 84 places, 77 transitions, 207 flow. Second operand 7 states and 487 transitions. [2022-01-19 07:54:36,143 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 123 transitions, 543 flow [2022-01-19 07:54:36,145 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 123 transitions, 533 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-01-19 07:54:36,149 INFO L242 Difference]: Finished difference. Result has 92 places, 100 transitions, 433 flow [2022-01-19 07:54:36,150 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=200, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=433, PETRI_PLACES=92, PETRI_TRANSITIONS=100} [2022-01-19 07:54:36,152 INFO L334 CegarLoopForPetriNet]: 78 programPoint places, 14 predicate places. [2022-01-19 07:54:36,152 INFO L470 AbstractCegarLoop]: Abstraction has has 92 places, 100 transitions, 433 flow [2022-01-19 07:54:36,153 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 64.16666666666667) internal successors, (385), 6 states have internal predecessors, (385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 07:54:36,153 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 07:54:36,153 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 07:54:36,153 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-19 07:54:36,153 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 07:54:36,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 07:54:36,154 INFO L85 PathProgramCache]: Analyzing trace with hash 84182980, now seen corresponding path program 3 times [2022-01-19 07:54:36,154 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 07:54:36,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26130442] [2022-01-19 07:54:36,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 07:54:36,155 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 07:54:36,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 07:54:36,352 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 07:54:36,352 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 07:54:36,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26130442] [2022-01-19 07:54:36,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26130442] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 07:54:36,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303776519] [2022-01-19 07:54:36,353 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-19 07:54:36,353 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 07:54:36,353 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 07:54:36,368 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 07:54:36,377 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-19 07:54:36,434 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-19 07:54:36,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 07:54:36,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-19 07:54:36,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 07:54:36,662 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 07:54:36,662 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-19 07:54:36,662 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1303776519] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 07:54:36,662 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-19 07:54:36,662 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [7] total 13 [2022-01-19 07:54:36,663 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014268306] [2022-01-19 07:54:36,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 07:54:36,663 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-19 07:54:36,663 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 07:54:36,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-19 07:54:36,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2022-01-19 07:54:36,664 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 88 [2022-01-19 07:54:36,665 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 100 transitions, 433 flow. Second operand has 8 states, 8 states have (on average 55.25) internal successors, (442), 8 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 07:54:36,665 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 07:54:36,665 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 88 [2022-01-19 07:54:36,665 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 07:54:36,903 INFO L129 PetriNetUnfolder]: 170/477 cut-off events. [2022-01-19 07:54:36,903 INFO L130 PetriNetUnfolder]: For 723/723 co-relation queries the response was YES. [2022-01-19 07:54:36,905 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1609 conditions, 477 events. 170/477 cut-off events. For 723/723 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 2176 event pairs, 35 based on Foata normal form. 6/474 useless extension candidates. Maximal degree in co-relation 1596. Up to 189 conditions per place. [2022-01-19 07:54:36,907 INFO L132 encePairwiseOnDemand]: 77/88 looper letters, 86 selfloop transitions, 30 changer transitions 0/158 dead transitions. [2022-01-19 07:54:36,907 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 158 transitions, 1024 flow [2022-01-19 07:54:36,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-19 07:54:36,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-01-19 07:54:36,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 642 transitions. [2022-01-19 07:54:36,909 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6632231404958677 [2022-01-19 07:54:36,909 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 642 transitions. [2022-01-19 07:54:36,909 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 642 transitions. [2022-01-19 07:54:36,910 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 07:54:36,910 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 642 transitions. [2022-01-19 07:54:36,911 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 58.36363636363637) internal successors, (642), 11 states have internal predecessors, (642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 07:54:36,912 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 88.0) internal successors, (1056), 12 states have internal predecessors, (1056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 07:54:36,912 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 88.0) internal successors, (1056), 12 states have internal predecessors, (1056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 07:54:36,912 INFO L186 Difference]: Start difference. First operand has 92 places, 100 transitions, 433 flow. Second operand 11 states and 642 transitions. [2022-01-19 07:54:36,912 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 158 transitions, 1024 flow [2022-01-19 07:54:36,918 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 158 transitions, 1012 flow, removed 6 selfloop flow, removed 0 redundant places. [2022-01-19 07:54:36,923 INFO L242 Difference]: Finished difference. Result has 104 places, 115 transitions, 628 flow [2022-01-19 07:54:36,923 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=429, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=628, PETRI_PLACES=104, PETRI_TRANSITIONS=115} [2022-01-19 07:54:36,924 INFO L334 CegarLoopForPetriNet]: 78 programPoint places, 26 predicate places. [2022-01-19 07:54:36,924 INFO L470 AbstractCegarLoop]: Abstraction has has 104 places, 115 transitions, 628 flow [2022-01-19 07:54:36,924 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 55.25) internal successors, (442), 8 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 07:54:36,924 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 07:54:36,924 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 07:54:36,961 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-19 07:54:37,159 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 07:54:37,160 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 07:54:37,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 07:54:37,160 INFO L85 PathProgramCache]: Analyzing trace with hash 1459907376, now seen corresponding path program 4 times [2022-01-19 07:54:37,160 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 07:54:37,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182841655] [2022-01-19 07:54:37,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 07:54:37,161 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 07:54:37,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 07:54:37,580 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 07:54:37,580 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 07:54:37,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182841655] [2022-01-19 07:54:37,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182841655] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 07:54:37,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621270578] [2022-01-19 07:54:37,581 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-19 07:54:37,581 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 07:54:37,581 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 07:54:37,582 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 07:54:37,583 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-19 07:54:37,644 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-19 07:54:37,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 07:54:37,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-19 07:54:37,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 07:54:38,318 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 07:54:38,318 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 07:54:39,076 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 07:54:39,077 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [621270578] provided 1 perfect and 1 imperfect interpolant sequences [2022-01-19 07:54:39,077 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-01-19 07:54:39,077 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [13, 15] total 31 [2022-01-19 07:54:39,077 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98909521] [2022-01-19 07:54:39,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 07:54:39,077 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-19 07:54:39,077 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 07:54:39,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-19 07:54:39,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=716, Unknown=0, NotChecked=0, Total=930 [2022-01-19 07:54:39,079 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 88 [2022-01-19 07:54:39,079 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 115 transitions, 628 flow. Second operand has 14 states, 14 states have (on average 51.07142857142857) internal successors, (715), 14 states have internal predecessors, (715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 07:54:39,079 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 07:54:39,079 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 88 [2022-01-19 07:54:39,080 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 07:54:42,568 INFO L129 PetriNetUnfolder]: 430/1265 cut-off events. [2022-01-19 07:54:42,568 INFO L130 PetriNetUnfolder]: For 2658/2658 co-relation queries the response was YES. [2022-01-19 07:54:42,571 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4394 conditions, 1265 events. 430/1265 cut-off events. For 2658/2658 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 8550 event pairs, 34 based on Foata normal form. 3/1256 useless extension candidates. Maximal degree in co-relation 4378. Up to 305 conditions per place. [2022-01-19 07:54:42,576 INFO L132 encePairwiseOnDemand]: 69/88 looper letters, 156 selfloop transitions, 122 changer transitions 19/336 dead transitions. [2022-01-19 07:54:42,576 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 336 transitions, 2835 flow [2022-01-19 07:54:42,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-19 07:54:42,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2022-01-19 07:54:42,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 1523 transitions. [2022-01-19 07:54:42,579 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6181006493506493 [2022-01-19 07:54:42,579 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 1523 transitions. [2022-01-19 07:54:42,579 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 1523 transitions. [2022-01-19 07:54:42,580 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 07:54:42,580 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 1523 transitions. [2022-01-19 07:54:42,582 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 54.392857142857146) internal successors, (1523), 28 states have internal predecessors, (1523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 07:54:42,585 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 88.0) internal successors, (2552), 29 states have internal predecessors, (2552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 07:54:42,586 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 88.0) internal successors, (2552), 29 states have internal predecessors, (2552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 07:54:42,586 INFO L186 Difference]: Start difference. First operand has 104 places, 115 transitions, 628 flow. Second operand 28 states and 1523 transitions. [2022-01-19 07:54:42,586 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 336 transitions, 2835 flow [2022-01-19 07:54:42,593 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 336 transitions, 2783 flow, removed 3 selfloop flow, removed 5 redundant places. [2022-01-19 07:54:42,598 INFO L242 Difference]: Finished difference. Result has 135 places, 217 transitions, 1772 flow [2022-01-19 07:54:42,599 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=594, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=1772, PETRI_PLACES=135, PETRI_TRANSITIONS=217} [2022-01-19 07:54:42,600 INFO L334 CegarLoopForPetriNet]: 78 programPoint places, 57 predicate places. [2022-01-19 07:54:42,600 INFO L470 AbstractCegarLoop]: Abstraction has has 135 places, 217 transitions, 1772 flow [2022-01-19 07:54:42,601 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 51.07142857142857) internal successors, (715), 14 states have internal predecessors, (715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 07:54:42,601 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 07:54:42,601 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 07:54:42,631 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-01-19 07:54:42,816 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 07:54:42,817 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 07:54:42,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 07:54:42,817 INFO L85 PathProgramCache]: Analyzing trace with hash 570045214, now seen corresponding path program 5 times [2022-01-19 07:54:42,817 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 07:54:42,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878729417] [2022-01-19 07:54:42,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 07:54:42,817 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 07:54:42,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 07:54:42,897 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 07:54:42,897 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 07:54:42,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878729417] [2022-01-19 07:54:42,897 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878729417] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 07:54:42,897 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 07:54:42,897 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-19 07:54:42,898 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821608154] [2022-01-19 07:54:42,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 07:54:42,898 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-19 07:54:42,898 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 07:54:42,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-19 07:54:42,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-19 07:54:42,899 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 88 [2022-01-19 07:54:42,899 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 217 transitions, 1772 flow. Second operand has 6 states, 6 states have (on average 64.16666666666667) internal successors, (385), 6 states have internal predecessors, (385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 07:54:42,899 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 07:54:42,899 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 88 [2022-01-19 07:54:42,899 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 07:54:43,133 INFO L129 PetriNetUnfolder]: 558/1481 cut-off events. [2022-01-19 07:54:43,133 INFO L130 PetriNetUnfolder]: For 6978/6978 co-relation queries the response was YES. [2022-01-19 07:54:43,138 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6714 conditions, 1481 events. 558/1481 cut-off events. For 6978/6978 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 9956 event pairs, 18 based on Foata normal form. 22/1491 useless extension candidates. Maximal degree in co-relation 6688. Up to 370 conditions per place. [2022-01-19 07:54:43,145 INFO L132 encePairwiseOnDemand]: 81/88 looper letters, 216 selfloop transitions, 109 changer transitions 0/374 dead transitions. [2022-01-19 07:54:43,145 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 374 transitions, 3973 flow [2022-01-19 07:54:43,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-19 07:54:43,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-01-19 07:54:43,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 478 transitions. [2022-01-19 07:54:43,146 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.775974025974026 [2022-01-19 07:54:43,146 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 478 transitions. [2022-01-19 07:54:43,146 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 478 transitions. [2022-01-19 07:54:43,147 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 07:54:43,147 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 478 transitions. [2022-01-19 07:54:43,148 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 68.28571428571429) internal successors, (478), 7 states have internal predecessors, (478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 07:54:43,149 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) [2022-01-19 07:54:43,149 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) [2022-01-19 07:54:43,149 INFO L186 Difference]: Start difference. First operand has 135 places, 217 transitions, 1772 flow. Second operand 7 states and 478 transitions. [2022-01-19 07:54:43,149 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 374 transitions, 3973 flow [2022-01-19 07:54:43,166 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 374 transitions, 3747 flow, removed 107 selfloop flow, removed 9 redundant places. [2022-01-19 07:54:43,171 INFO L242 Difference]: Finished difference. Result has 133 places, 275 transitions, 2762 flow [2022-01-19 07:54:43,171 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=1656, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2762, PETRI_PLACES=133, PETRI_TRANSITIONS=275} [2022-01-19 07:54:43,171 INFO L334 CegarLoopForPetriNet]: 78 programPoint places, 55 predicate places. [2022-01-19 07:54:43,171 INFO L470 AbstractCegarLoop]: Abstraction has has 133 places, 275 transitions, 2762 flow [2022-01-19 07:54:43,172 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 64.16666666666667) internal successors, (385), 6 states have internal predecessors, (385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 07:54:43,172 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 07:54:43,172 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 07:54:43,172 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-01-19 07:54:43,172 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 07:54:43,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 07:54:43,172 INFO L85 PathProgramCache]: Analyzing trace with hash -2048782589, now seen corresponding path program 1 times [2022-01-19 07:54:43,172 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 07:54:43,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499398726] [2022-01-19 07:54:43,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 07:54:43,173 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 07:54:43,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 07:54:43,535 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 07:54:43,536 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 07:54:43,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499398726] [2022-01-19 07:54:43,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499398726] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 07:54:43,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1543457370] [2022-01-19 07:54:43,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 07:54:43,536 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 07:54:43,536 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 07:54:43,556 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 07:54:43,558 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-19 07:54:43,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 07:54:43,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-19 07:54:43,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 07:54:44,710 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 07:54:44,710 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 07:54:46,748 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 07:54:46,749 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1543457370] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 07:54:46,749 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 07:54:46,749 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 17] total 37 [2022-01-19 07:54:46,749 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508826992] [2022-01-19 07:54:46,749 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 07:54:46,750 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-19 07:54:46,750 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 07:54:46,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-19 07:54:46,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=247, Invalid=1085, Unknown=0, NotChecked=0, Total=1332 [2022-01-19 07:54:46,752 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 88 [2022-01-19 07:54:46,754 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 275 transitions, 2762 flow. Second operand has 37 states, 37 states have (on average 53.0) internal successors, (1961), 37 states have internal predecessors, (1961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 07:54:46,754 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 07:54:46,754 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 88 [2022-01-19 07:54:46,754 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 07:54:57,783 INFO L129 PetriNetUnfolder]: 1399/3956 cut-off events. [2022-01-19 07:54:57,783 INFO L130 PetriNetUnfolder]: For 18666/18791 co-relation queries the response was YES. [2022-01-19 07:54:57,795 INFO L84 FinitePrefix]: Finished finitePrefix Result has 18104 conditions, 3956 events. 1399/3956 cut-off events. For 18666/18791 co-relation queries the response was YES. Maximal size of possible extension queue 267. Compared 34593 event pairs, 44 based on Foata normal form. 73/4026 useless extension candidates. Maximal degree in co-relation 18076. Up to 1095 conditions per place. [2022-01-19 07:54:57,811 INFO L132 encePairwiseOnDemand]: 69/88 looper letters, 399 selfloop transitions, 524 changer transitions 95/1068 dead transitions. [2022-01-19 07:54:57,811 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 1068 transitions, 13702 flow [2022-01-19 07:54:57,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-01-19 07:54:57,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2022-01-19 07:54:57,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 4941 transitions. [2022-01-19 07:54:57,818 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6238636363636364 [2022-01-19 07:54:57,818 INFO L72 ComplementDD]: Start complementDD. Operand 90 states and 4941 transitions. [2022-01-19 07:54:57,818 INFO L73 IsDeterministic]: Start isDeterministic. Operand 90 states and 4941 transitions. [2022-01-19 07:54:57,819 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 07:54:57,819 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 90 states and 4941 transitions. [2022-01-19 07:54:57,826 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 91 states, 90 states have (on average 54.9) internal successors, (4941), 90 states have internal predecessors, (4941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 07:54:57,833 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) [2022-01-19 07:54:57,834 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) [2022-01-19 07:54:57,834 INFO L186 Difference]: Start difference. First operand has 133 places, 275 transitions, 2762 flow. Second operand 90 states and 4941 transitions. [2022-01-19 07:54:57,834 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 1068 transitions, 13702 flow [2022-01-19 07:54:57,887 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 1068 transitions, 13614 flow, removed 44 selfloop flow, removed 0 redundant places. [2022-01-19 07:54:57,897 INFO L242 Difference]: Finished difference. Result has 276 places, 694 transitions, 10269 flow [2022-01-19 07:54:57,897 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=2752, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=275, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=152, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=90, PETRI_FLOW=10269, PETRI_PLACES=276, PETRI_TRANSITIONS=694} [2022-01-19 07:54:57,898 INFO L334 CegarLoopForPetriNet]: 78 programPoint places, 198 predicate places. [2022-01-19 07:54:57,898 INFO L470 AbstractCegarLoop]: Abstraction has has 276 places, 694 transitions, 10269 flow [2022-01-19 07:54:57,898 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 53.0) internal successors, (1961), 37 states have internal predecessors, (1961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 07:54:57,898 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 07:54:57,898 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 07:54:57,918 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-19 07:54:58,102 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 07:54:58,102 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 07:54:58,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 07:54:58,103 INFO L85 PathProgramCache]: Analyzing trace with hash 52711945, now seen corresponding path program 2 times [2022-01-19 07:54:58,103 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 07:54:58,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733712414] [2022-01-19 07:54:58,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 07:54:58,103 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 07:54:58,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 07:54:58,511 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 07:54:58,512 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 07:54:58,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733712414] [2022-01-19 07:54:58,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733712414] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 07:54:58,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091214647] [2022-01-19 07:54:58,512 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-19 07:54:58,512 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 07:54:58,512 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 07:54:58,513 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 07:54:58,514 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-19 07:54:58,603 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-19 07:54:58,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 07:54:58,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-19 07:54:58,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 07:54:59,438 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 07:54:59,438 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 07:55:01,653 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 07:55:01,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1091214647] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 07:55:01,653 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 07:55:01,653 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 17] total 37 [2022-01-19 07:55:01,653 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167899981] [2022-01-19 07:55:01,654 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 07:55:01,654 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-19 07:55:01,654 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 07:55:01,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-19 07:55:01,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=1087, Unknown=0, NotChecked=0, Total=1332 [2022-01-19 07:55:01,656 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 88 [2022-01-19 07:55:01,657 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 694 transitions, 10269 flow. Second operand has 37 states, 37 states have (on average 51.054054054054056) internal successors, (1889), 37 states have internal predecessors, (1889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 07:55:01,657 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 07:55:01,657 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 88 [2022-01-19 07:55:01,657 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 07:55:23,367 INFO L129 PetriNetUnfolder]: 2162/5808 cut-off events. [2022-01-19 07:55:23,367 INFO L130 PetriNetUnfolder]: For 51404/51404 co-relation queries the response was YES. [2022-01-19 07:55:23,422 INFO L84 FinitePrefix]: Finished finitePrefix Result has 33647 conditions, 5808 events. 2162/5808 cut-off events. For 51404/51404 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 53528 event pairs, 91 based on Foata normal form. 22/5816 useless extension candidates. Maximal degree in co-relation 33565. Up to 1572 conditions per place. [2022-01-19 07:55:23,448 INFO L132 encePairwiseOnDemand]: 68/88 looper letters, 755 selfloop transitions, 606 changer transitions 124/1524 dead transitions. [2022-01-19 07:55:23,449 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 354 places, 1524 transitions, 24587 flow [2022-01-19 07:55:23,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2022-01-19 07:55:23,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2022-01-19 07:55:23,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 5685 transitions. [2022-01-19 07:55:23,565 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6037595581988106 [2022-01-19 07:55:23,565 INFO L72 ComplementDD]: Start complementDD. Operand 107 states and 5685 transitions. [2022-01-19 07:55:23,565 INFO L73 IsDeterministic]: Start isDeterministic. Operand 107 states and 5685 transitions. [2022-01-19 07:55:23,567 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 07:55:23,567 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 107 states and 5685 transitions. [2022-01-19 07:55:23,576 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 108 states, 107 states have (on average 53.13084112149533) internal successors, (5685), 107 states have internal predecessors, (5685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 07:55:23,587 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 108 states, 108 states have (on average 88.0) internal successors, (9504), 108 states have internal predecessors, (9504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 07:55:23,588 INFO L81 ComplementDD]: Finished complementDD. Result has 108 states, 108 states have (on average 88.0) internal successors, (9504), 108 states have internal predecessors, (9504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 07:55:23,588 INFO L186 Difference]: Start difference. First operand has 276 places, 694 transitions, 10269 flow. Second operand 107 states and 5685 transitions. [2022-01-19 07:55:23,588 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 354 places, 1524 transitions, 24587 flow [2022-01-19 07:55:23,881 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 320 places, 1524 transitions, 22813 flow, removed 873 selfloop flow, removed 34 redundant places. [2022-01-19 07:55:23,897 INFO L242 Difference]: Finished difference. Result has 377 places, 1017 transitions, 16771 flow [2022-01-19 07:55:23,898 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=9577, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=694, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=347, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=283, PETRI_DIFFERENCE_SUBTRAHEND_STATES=107, PETRI_FLOW=16771, PETRI_PLACES=377, PETRI_TRANSITIONS=1017} [2022-01-19 07:55:23,898 INFO L334 CegarLoopForPetriNet]: 78 programPoint places, 299 predicate places. [2022-01-19 07:55:23,899 INFO L470 AbstractCegarLoop]: Abstraction has has 377 places, 1017 transitions, 16771 flow [2022-01-19 07:55:23,899 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 51.054054054054056) internal successors, (1889), 37 states have internal predecessors, (1889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 07:55:23,899 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 07:55:23,899 INFO L254 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] [2022-01-19 07:55:23,916 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-01-19 07:55:24,115 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 07:55:24,115 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 07:55:24,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 07:55:24,116 INFO L85 PathProgramCache]: Analyzing trace with hash 1220155352, now seen corresponding path program 3 times [2022-01-19 07:55:24,116 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 07:55:24,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902365855] [2022-01-19 07:55:24,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 07:55:24,116 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 07:55:24,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 07:55:25,155 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 07:55:25,156 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 07:55:25,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902365855] [2022-01-19 07:55:25,156 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902365855] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 07:55:25,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795866410] [2022-01-19 07:55:25,156 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-19 07:55:25,156 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 07:55:25,156 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 07:55:25,157 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 07:55:25,158 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-19 07:55:25,353 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-19 07:55:25,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 07:55:25,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-19 07:55:25,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 07:55:26,490 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 07:55:26,490 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 07:55:32,198 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 07:55:32,198 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1795866410] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 07:55:32,198 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 07:55:32,199 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 17] total 41 [2022-01-19 07:55:32,199 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44398636] [2022-01-19 07:55:32,199 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 07:55:32,199 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-19 07:55:32,199 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 07:55:32,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-19 07:55:32,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=1403, Unknown=1, NotChecked=0, Total=1640 [2022-01-19 07:55:32,201 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 88 [2022-01-19 07:55:32,202 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 377 places, 1017 transitions, 16771 flow. Second operand has 41 states, 41 states have (on average 51.1219512195122) internal successors, (2096), 41 states have internal predecessors, (2096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 07:55:32,202 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 07:55:32,202 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 88 [2022-01-19 07:55:32,202 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 07:55:45,696 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.85s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-19 07:55:48,776 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.79s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-19 07:56:05,257 INFO L129 PetriNetUnfolder]: 3562/9294 cut-off events. [2022-01-19 07:56:05,257 INFO L130 PetriNetUnfolder]: For 97770/97770 co-relation queries the response was YES. [2022-01-19 07:56:05,324 INFO L84 FinitePrefix]: Finished finitePrefix Result has 59973 conditions, 9294 events. 3562/9294 cut-off events. For 97770/97770 co-relation queries the response was YES. Maximal size of possible extension queue 523. Compared 90851 event pairs, 80 based on Foata normal form. 27/9304 useless extension candidates. Maximal degree in co-relation 59860. Up to 2682 conditions per place. [2022-01-19 07:56:05,366 INFO L132 encePairwiseOnDemand]: 65/88 looper letters, 1000 selfloop transitions, 1136 changer transitions 140/2315 dead transitions. [2022-01-19 07:56:05,366 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 453 places, 2315 transitions, 40326 flow [2022-01-19 07:56:05,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2022-01-19 07:56:05,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2022-01-19 07:56:05,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 5828 transitions. [2022-01-19 07:56:05,371 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6132154882154882 [2022-01-19 07:56:05,371 INFO L72 ComplementDD]: Start complementDD. Operand 108 states and 5828 transitions. [2022-01-19 07:56:05,371 INFO L73 IsDeterministic]: Start isDeterministic. Operand 108 states and 5828 transitions. [2022-01-19 07:56:05,372 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 07:56:05,372 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 108 states and 5828 transitions. [2022-01-19 07:56:05,378 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 109 states, 108 states have (on average 53.96296296296296) internal successors, (5828), 108 states have internal predecessors, (5828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 07:56:05,384 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 109 states, 109 states have (on average 88.0) internal successors, (9592), 109 states have internal predecessors, (9592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 07:56:05,385 INFO L81 ComplementDD]: Finished complementDD. Result has 109 states, 109 states have (on average 88.0) internal successors, (9592), 109 states have internal predecessors, (9592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 07:56:05,385 INFO L186 Difference]: Start difference. First operand has 377 places, 1017 transitions, 16771 flow. Second operand 108 states and 5828 transitions. [2022-01-19 07:56:05,385 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 453 places, 2315 transitions, 40326 flow [2022-01-19 07:56:06,473 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 398 places, 2315 transitions, 37367 flow, removed 1088 selfloop flow, removed 55 redundant places. [2022-01-19 07:56:06,499 INFO L242 Difference]: Finished difference. Result has 452 places, 1650 transitions, 30114 flow [2022-01-19 07:56:06,500 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=15397, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1017, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=592, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=274, PETRI_DIFFERENCE_SUBTRAHEND_STATES=108, PETRI_FLOW=30114, PETRI_PLACES=452, PETRI_TRANSITIONS=1650} [2022-01-19 07:56:06,500 INFO L334 CegarLoopForPetriNet]: 78 programPoint places, 374 predicate places. [2022-01-19 07:56:06,501 INFO L470 AbstractCegarLoop]: Abstraction has has 452 places, 1650 transitions, 30114 flow [2022-01-19 07:56:06,501 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 51.1219512195122) internal successors, (2096), 41 states have internal predecessors, (2096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 07:56:06,501 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 07:56:06,502 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 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] [2022-01-19 07:56:06,517 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-01-19 07:56:06,707 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 07:56:06,708 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 07:56:06,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 07:56:06,708 INFO L85 PathProgramCache]: Analyzing trace with hash 1834682964, now seen corresponding path program 6 times [2022-01-19 07:56:06,708 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 07:56:06,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421913184] [2022-01-19 07:56:06,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 07:56:06,708 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 07:56:06,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 07:56:07,275 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 07:56:07,275 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 07:56:07,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421913184] [2022-01-19 07:56:07,275 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421913184] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 07:56:07,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2043019412] [2022-01-19 07:56:07,275 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-19 07:56:07,276 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 07:56:07,276 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 07:56:07,276 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 07:56:07,277 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-01-19 07:56:07,396 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-19 07:56:07,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 07:56:07,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-19 07:56:07,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 07:56:08,388 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 07:56:08,388 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 07:56:09,464 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 07:56:09,464 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2043019412] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 07:56:09,464 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 07:56:09,464 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 18] total 45 [2022-01-19 07:56:09,464 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869133270] [2022-01-19 07:56:09,464 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 07:56:09,465 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-01-19 07:56:09,465 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 07:56:09,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-01-19 07:56:09,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=345, Invalid=1635, Unknown=0, NotChecked=0, Total=1980 [2022-01-19 07:56:09,467 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 88 [2022-01-19 07:56:09,468 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 452 places, 1650 transitions, 30114 flow. Second operand has 45 states, 45 states have (on average 51.08888888888889) internal successors, (2299), 45 states have internal predecessors, (2299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 07:56:09,468 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 07:56:09,468 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 88 [2022-01-19 07:56:09,468 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 07:56:45,781 INFO L129 PetriNetUnfolder]: 5029/12790 cut-off events. [2022-01-19 07:56:45,781 INFO L130 PetriNetUnfolder]: For 193051/193051 co-relation queries the response was YES. [2022-01-19 07:56:45,894 INFO L84 FinitePrefix]: Finished finitePrefix Result has 97282 conditions, 12790 events. 5029/12790 cut-off events. For 193051/193051 co-relation queries the response was YES. Maximal size of possible extension queue 721. Compared 129295 event pairs, 134 based on Foata normal form. 28/12802 useless extension candidates. Maximal degree in co-relation 97148. Up to 3867 conditions per place. [2022-01-19 07:56:45,969 INFO L132 encePairwiseOnDemand]: 66/88 looper letters, 998 selfloop transitions, 1957 changer transitions 105/3099 dead transitions. [2022-01-19 07:56:45,969 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 547 places, 3099 transitions, 62716 flow [2022-01-19 07:56:45,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2022-01-19 07:56:45,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2022-01-19 07:56:45,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 6934 transitions. [2022-01-19 07:56:45,976 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5969352617079889 [2022-01-19 07:56:45,976 INFO L72 ComplementDD]: Start complementDD. Operand 132 states and 6934 transitions. [2022-01-19 07:56:45,976 INFO L73 IsDeterministic]: Start isDeterministic. Operand 132 states and 6934 transitions. [2022-01-19 07:56:45,977 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 07:56:45,977 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 132 states and 6934 transitions. [2022-01-19 07:56:45,984 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 133 states, 132 states have (on average 52.53030303030303) internal successors, (6934), 132 states have internal predecessors, (6934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 07:56:45,993 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 133 states, 133 states have (on average 88.0) internal successors, (11704), 133 states have internal predecessors, (11704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 07:56:45,994 INFO L81 ComplementDD]: Finished complementDD. Result has 133 states, 133 states have (on average 88.0) internal successors, (11704), 133 states have internal predecessors, (11704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 07:56:45,995 INFO L186 Difference]: Start difference. First operand has 452 places, 1650 transitions, 30114 flow. Second operand 132 states and 6934 transitions. [2022-01-19 07:56:45,995 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 547 places, 3099 transitions, 62716 flow [2022-01-19 07:56:48,556 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 485 places, 3099 transitions, 58371 flow, removed 2039 selfloop flow, removed 62 redundant places. [2022-01-19 07:56:48,623 INFO L242 Difference]: Finished difference. Result has 551 places, 2608 transitions, 53649 flow [2022-01-19 07:56:48,624 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=28227, PETRI_DIFFERENCE_MINUEND_PLACES=354, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1650, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=368, PETRI_DIFFERENCE_SUBTRAHEND_STATES=132, PETRI_FLOW=53649, PETRI_PLACES=551, PETRI_TRANSITIONS=2608} [2022-01-19 07:56:48,624 INFO L334 CegarLoopForPetriNet]: 78 programPoint places, 473 predicate places. [2022-01-19 07:56:48,625 INFO L470 AbstractCegarLoop]: Abstraction has has 551 places, 2608 transitions, 53649 flow [2022-01-19 07:56:48,625 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 51.08888888888889) internal successors, (2299), 45 states have internal predecessors, (2299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 07:56:48,625 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 07:56:48,625 INFO L254 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] [2022-01-19 07:56:48,641 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-01-19 07:56:48,835 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 07:56:48,835 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 07:56:48,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 07:56:48,836 INFO L85 PathProgramCache]: Analyzing trace with hash 1756856783, now seen corresponding path program 4 times [2022-01-19 07:56:48,836 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 07:56:48,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466051263] [2022-01-19 07:56:48,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 07:56:48,836 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 07:56:48,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 07:56:49,944 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 07:56:49,944 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 07:56:49,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466051263] [2022-01-19 07:56:49,945 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466051263] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 07:56:49,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282430530] [2022-01-19 07:56:49,945 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-19 07:56:49,945 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 07:56:49,945 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 07:56:49,946 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 07:56:49,947 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-01-19 07:56:50,092 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-19 07:56:50,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 07:56:50,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-19 07:56:50,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 07:56:51,615 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 07:56:51,616 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 07:57:03,907 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 07:57:03,907 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1282430530] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 07:57:03,908 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 07:57:03,908 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 20, 20] total 42 [2022-01-19 07:57:03,908 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469574688] [2022-01-19 07:57:03,908 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 07:57:03,909 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-19 07:57:03,909 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 07:57:03,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-19 07:57:03,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=1422, Unknown=0, NotChecked=0, Total=1722 [2022-01-19 07:57:03,915 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 88 [2022-01-19 07:57:03,916 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 551 places, 2608 transitions, 53649 flow. Second operand has 42 states, 42 states have (on average 51.26190476190476) internal successors, (2153), 42 states have internal predecessors, (2153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 07:57:03,916 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 07:57:03,916 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 88 [2022-01-19 07:57:03,916 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 07:59:07,054 INFO L129 PetriNetUnfolder]: 7203/18158 cut-off events. [2022-01-19 07:59:07,054 INFO L130 PetriNetUnfolder]: For 487865/487865 co-relation queries the response was YES. [2022-01-19 07:59:07,327 INFO L84 FinitePrefix]: Finished finitePrefix Result has 169834 conditions, 18158 events. 7203/18158 cut-off events. For 487865/487865 co-relation queries the response was YES. Maximal size of possible extension queue 1001. Compared 193452 event pairs, 131 based on Foata normal form. 36/18181 useless extension candidates. Maximal degree in co-relation 169675. Up to 5281 conditions per place. [2022-01-19 07:59:07,561 INFO L132 encePairwiseOnDemand]: 64/88 looper letters, 2830 selfloop transitions, 1897 changer transitions 157/4923 dead transitions. [2022-01-19 07:59:07,561 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 668 places, 4923 transitions, 112894 flow [2022-01-19 07:59:07,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2022-01-19 07:59:07,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2022-01-19 07:59:07,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 7317 transitions. [2022-01-19 07:59:07,569 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6025197628458498 [2022-01-19 07:59:07,570 INFO L72 ComplementDD]: Start complementDD. Operand 138 states and 7317 transitions. [2022-01-19 07:59:07,570 INFO L73 IsDeterministic]: Start isDeterministic. Operand 138 states and 7317 transitions. [2022-01-19 07:59:07,571 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 07:59:07,571 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 138 states and 7317 transitions. [2022-01-19 07:59:07,578 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 139 states, 138 states have (on average 53.02173913043478) internal successors, (7317), 138 states have internal predecessors, (7317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 07:59:07,587 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) [2022-01-19 07:59:07,588 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) [2022-01-19 07:59:07,588 INFO L186 Difference]: Start difference. First operand has 551 places, 2608 transitions, 53649 flow. Second operand 138 states and 7317 transitions. [2022-01-19 07:59:07,588 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 668 places, 4923 transitions, 112894 flow [2022-01-19 07:59:15,366 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 630 places, 4923 transitions, 107632 flow, removed 2546 selfloop flow, removed 38 redundant places. [2022-01-19 07:59:15,439 INFO L242 Difference]: Finished difference. Result has 703 places, 4020 transitions, 89949 flow [2022-01-19 07:59:15,440 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=50058, PETRI_DIFFERENCE_MINUEND_PLACES=493, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2608, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=731, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1530, PETRI_DIFFERENCE_SUBTRAHEND_STATES=138, PETRI_FLOW=89949, PETRI_PLACES=703, PETRI_TRANSITIONS=4020} [2022-01-19 07:59:15,441 INFO L334 CegarLoopForPetriNet]: 78 programPoint places, 625 predicate places. [2022-01-19 07:59:15,441 INFO L470 AbstractCegarLoop]: Abstraction has has 703 places, 4020 transitions, 89949 flow [2022-01-19 07:59:15,441 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 51.26190476190476) internal successors, (2153), 42 states have internal predecessors, (2153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 07:59:15,441 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 07:59:15,441 INFO L254 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] [2022-01-19 07:59:15,457 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-01-19 07:59:15,656 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-01-19 07:59:15,657 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 07:59:15,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 07:59:15,657 INFO L85 PathProgramCache]: Analyzing trace with hash -1334778211, now seen corresponding path program 5 times [2022-01-19 07:59:15,657 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 07:59:15,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520644561] [2022-01-19 07:59:15,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 07:59:15,657 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 07:59:15,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 07:59:16,928 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 07:59:16,928 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 07:59:16,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520644561] [2022-01-19 07:59:16,928 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520644561] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 07:59:16,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562958504] [2022-01-19 07:59:16,928 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-19 07:59:16,928 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 07:59:16,928 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 07:59:16,929 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 07:59:16,930 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-01-19 07:59:17,045 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-01-19 07:59:17,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 07:59:17,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-19 07:59:17,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 07:59:18,514 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 07:59:18,514 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 07:59:33,351 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 07:59:33,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1562958504] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 07:59:33,352 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 07:59:33,352 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20, 19] total 49 [2022-01-19 07:59:33,352 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701707881] [2022-01-19 07:59:33,352 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 07:59:33,352 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-01-19 07:59:33,352 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 07:59:33,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-01-19 07:59:33,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=338, Invalid=2011, Unknown=3, NotChecked=0, Total=2352 [2022-01-19 07:59:33,354 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 88 [2022-01-19 07:59:33,357 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 703 places, 4020 transitions, 89949 flow. Second operand has 49 states, 49 states have (on average 51.04081632653061) internal successors, (2501), 49 states have internal predecessors, (2501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 07:59:33,357 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 07:59:33,358 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 88 [2022-01-19 07:59:33,358 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:01:15,422 WARN L228 SmtUtils]: Spent 8.19s on a formula simplification. DAG size of input: 201 DAG size of output: 54 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-19 08:01:46,361 WARN L228 SmtUtils]: Spent 6.67s on a formula simplification. DAG size of input: 226 DAG size of output: 58 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-19 08:02:18,942 INFO L129 PetriNetUnfolder]: 8274/20720 cut-off events. [2022-01-19 08:02:18,942 INFO L130 PetriNetUnfolder]: For 602234/602234 co-relation queries the response was YES. [2022-01-19 08:02:19,242 INFO L84 FinitePrefix]: Finished finitePrefix Result has 210393 conditions, 20720 events. 8274/20720 cut-off events. For 602234/602234 co-relation queries the response was YES. Maximal size of possible extension queue 1142. Compared 223805 event pairs, 61 based on Foata normal form. 38/20735 useless extension candidates. Maximal degree in co-relation 210182. Up to 7562 conditions per place. [2022-01-19 08:02:19,364 INFO L132 encePairwiseOnDemand]: 65/88 looper letters, 3107 selfloop transitions, 2244 changer transitions 188/5578 dead transitions. [2022-01-19 08:02:19,364 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 793 places, 5578 transitions, 137784 flow [2022-01-19 08:02:19,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2022-01-19 08:02:19,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2022-01-19 08:02:19,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 6564 transitions. [2022-01-19 08:02:19,389 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6015395894428153 [2022-01-19 08:02:19,389 INFO L72 ComplementDD]: Start complementDD. Operand 124 states and 6564 transitions. [2022-01-19 08:02:19,389 INFO L73 IsDeterministic]: Start isDeterministic. Operand 124 states and 6564 transitions. [2022-01-19 08:02:19,390 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:02:19,390 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 124 states and 6564 transitions. [2022-01-19 08:02:19,396 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 125 states, 124 states have (on average 52.935483870967744) internal successors, (6564), 124 states have internal predecessors, (6564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:02:19,423 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 125 states, 125 states have (on average 88.0) internal successors, (11000), 125 states have internal predecessors, (11000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:02:19,424 INFO L81 ComplementDD]: Finished complementDD. Result has 125 states, 125 states have (on average 88.0) internal successors, (11000), 125 states have internal predecessors, (11000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:02:19,424 INFO L186 Difference]: Start difference. First operand has 703 places, 4020 transitions, 89949 flow. Second operand 124 states and 6564 transitions. [2022-01-19 08:02:19,424 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 793 places, 5578 transitions, 137784 flow [2022-01-19 08:02:34,214 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 731 places, 5578 transitions, 126581 flow, removed 4786 selfloop flow, removed 62 redundant places. [2022-01-19 08:02:34,346 INFO L242 Difference]: Finished difference. Result has 788 places, 4700 transitions, 108704 flow [2022-01-19 08:02:34,349 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=83763, PETRI_DIFFERENCE_MINUEND_PLACES=608, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4020, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1625, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=124, PETRI_FLOW=108704, PETRI_PLACES=788, PETRI_TRANSITIONS=4700} [2022-01-19 08:02:34,349 INFO L334 CegarLoopForPetriNet]: 78 programPoint places, 710 predicate places. [2022-01-19 08:02:34,349 INFO L470 AbstractCegarLoop]: Abstraction has has 788 places, 4700 transitions, 108704 flow [2022-01-19 08:02:34,350 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 51.04081632653061) internal successors, (2501), 49 states have internal predecessors, (2501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:02:34,350 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:02:34,350 INFO L254 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] [2022-01-19 08:02:34,366 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-01-19 08:02:34,555 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-01-19 08:02:34,555 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:02:34,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:02:34,556 INFO L85 PathProgramCache]: Analyzing trace with hash 824615955, now seen corresponding path program 6 times [2022-01-19 08:02:34,556 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:02:34,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877119084] [2022-01-19 08:02:34,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:02:34,556 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:02:34,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:02:35,733 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:02:35,734 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:02:35,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877119084] [2022-01-19 08:02:35,734 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877119084] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 08:02:35,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1761386813] [2022-01-19 08:02:35,734 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-19 08:02:35,734 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:02:35,734 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 08:02:35,756 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 08:02:35,758 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-01-19 08:02:35,973 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-19 08:02:35,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 08:02:35,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-19 08:02:35,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 08:02:38,823 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:02:38,824 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 08:02:44,325 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:02:44,325 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1761386813] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 08:02:44,325 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 08:02:44,326 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 20, 19] total 44 [2022-01-19 08:02:44,326 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823638282] [2022-01-19 08:02:44,326 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 08:02:44,326 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-01-19 08:02:44,326 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:02:44,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-01-19 08:02:44,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=290, Invalid=1602, Unknown=0, NotChecked=0, Total=1892 [2022-01-19 08:02:44,327 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 88 [2022-01-19 08:02:44,329 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 788 places, 4700 transitions, 108704 flow. Second operand has 44 states, 44 states have (on average 51.20454545454545) internal successors, (2253), 44 states have internal predecessors, (2253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:02:44,329 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:02:44,329 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 88 [2022-01-19 08:02:44,329 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:03:09,154 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.85s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-19 08:04:28,047 INFO L129 PetriNetUnfolder]: 9533/23756 cut-off events. [2022-01-19 08:04:28,048 INFO L130 PetriNetUnfolder]: For 576883/576883 co-relation queries the response was YES. [2022-01-19 08:04:28,481 INFO L84 FinitePrefix]: Finished finitePrefix Result has 227683 conditions, 23756 events. 9533/23756 cut-off events. For 576883/576883 co-relation queries the response was YES. Maximal size of possible extension queue 1296. Compared 262232 event pairs, 72 based on Foata normal form. 37/23773 useless extension candidates. Maximal degree in co-relation 227460. Up to 8246 conditions per place. [2022-01-19 08:04:28,647 INFO L132 encePairwiseOnDemand]: 67/88 looper letters, 3471 selfloop transitions, 2730 changer transitions 202/6442 dead transitions. [2022-01-19 08:04:28,648 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 891 places, 6442 transitions, 159592 flow [2022-01-19 08:04:28,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 144 states. [2022-01-19 08:04:28,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2022-01-19 08:04:28,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 7594 transitions. [2022-01-19 08:04:28,654 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.59927398989899 [2022-01-19 08:04:28,654 INFO L72 ComplementDD]: Start complementDD. Operand 144 states and 7594 transitions. [2022-01-19 08:04:28,654 INFO L73 IsDeterministic]: Start isDeterministic. Operand 144 states and 7594 transitions. [2022-01-19 08:04:28,655 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:04:28,655 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 144 states and 7594 transitions. [2022-01-19 08:04:28,662 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 145 states, 144 states have (on average 52.736111111111114) internal successors, (7594), 144 states have internal predecessors, (7594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:04:28,669 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 145 states, 145 states have (on average 88.0) internal successors, (12760), 145 states have internal predecessors, (12760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:04:28,669 INFO L81 ComplementDD]: Finished complementDD. Result has 145 states, 145 states have (on average 88.0) internal successors, (12760), 145 states have internal predecessors, (12760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:04:28,670 INFO L186 Difference]: Start difference. First operand has 788 places, 4700 transitions, 108704 flow. Second operand 144 states and 7594 transitions. [2022-01-19 08:04:28,670 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 891 places, 6442 transitions, 159592 flow [2022-01-19 08:04:45,873 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 833 places, 6442 transitions, 155994 flow, removed 1669 selfloop flow, removed 58 redundant places. [2022-01-19 08:04:45,987 INFO L242 Difference]: Finished difference. Result has 899 places, 5561 transitions, 138111 flow [2022-01-19 08:04:45,990 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=106449, PETRI_DIFFERENCE_MINUEND_PLACES=690, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4700, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1962, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2427, PETRI_DIFFERENCE_SUBTRAHEND_STATES=144, PETRI_FLOW=138111, PETRI_PLACES=899, PETRI_TRANSITIONS=5561} [2022-01-19 08:04:45,991 INFO L334 CegarLoopForPetriNet]: 78 programPoint places, 821 predicate places. [2022-01-19 08:04:45,991 INFO L470 AbstractCegarLoop]: Abstraction has has 899 places, 5561 transitions, 138111 flow [2022-01-19 08:04:45,991 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 51.20454545454545) internal successors, (2253), 44 states have internal predecessors, (2253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:04:45,991 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:04:45,991 INFO L254 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] [2022-01-19 08:04:45,996 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-01-19 08:04:46,195 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-01-19 08:04:46,196 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:04:46,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:04:46,196 INFO L85 PathProgramCache]: Analyzing trace with hash 139532605, now seen corresponding path program 7 times [2022-01-19 08:04:46,196 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:04:46,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693153773] [2022-01-19 08:04:46,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:04:46,196 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:04:46,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:04:47,918 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:04:47,918 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:04:47,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693153773] [2022-01-19 08:04:47,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693153773] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 08:04:47,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [910766917] [2022-01-19 08:04:47,918 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-19 08:04:47,918 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:04:47,919 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 08:04:47,920 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 08:04:47,920 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-01-19 08:04:48,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:04:48,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-19 08:04:48,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 08:04:49,069 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:04:49,069 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 08:04:56,127 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:04:56,127 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [910766917] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 08:04:56,128 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 08:04:56,128 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 18, 18] total 38 [2022-01-19 08:04:56,128 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310662696] [2022-01-19 08:04:56,128 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 08:04:56,129 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-01-19 08:04:56,129 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:04:56,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-01-19 08:04:56,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=1190, Unknown=0, NotChecked=0, Total=1406 [2022-01-19 08:04:56,130 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 88 [2022-01-19 08:04:56,131 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 899 places, 5561 transitions, 138111 flow. Second operand has 38 states, 38 states have (on average 51.44736842105263) internal successors, (1955), 38 states have internal predecessors, (1955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:04:56,131 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:04:56,131 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 88 [2022-01-19 08:04:56,131 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:06:25,055 INFO L129 PetriNetUnfolder]: 10645/26362 cut-off events. [2022-01-19 08:06:25,056 INFO L130 PetriNetUnfolder]: For 758771/758771 co-relation queries the response was YES. [2022-01-19 08:06:26,088 INFO L84 FinitePrefix]: Finished finitePrefix Result has 271286 conditions, 26362 events. 10645/26362 cut-off events. For 758771/758771 co-relation queries the response was YES. Maximal size of possible extension queue 1419. Compared 295099 event pairs, 168 based on Foata normal form. 24/26349 useless extension candidates. Maximal degree in co-relation 271036. Up to 9356 conditions per place. [2022-01-19 08:06:26,282 INFO L132 encePairwiseOnDemand]: 67/88 looper letters, 3715 selfloop transitions, 3143 changer transitions 119/7016 dead transitions. [2022-01-19 08:06:26,282 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 941 places, 7016 transitions, 186264 flow [2022-01-19 08:06:26,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-01-19 08:06:26,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2022-01-19 08:06:26,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 4684 transitions. [2022-01-19 08:06:26,286 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6048553719008265 [2022-01-19 08:06:26,286 INFO L72 ComplementDD]: Start complementDD. Operand 88 states and 4684 transitions. [2022-01-19 08:06:26,286 INFO L73 IsDeterministic]: Start isDeterministic. Operand 88 states and 4684 transitions. [2022-01-19 08:06:26,287 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:06:26,287 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 88 states and 4684 transitions. [2022-01-19 08:06:26,409 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 89 states, 88 states have (on average 53.22727272727273) internal successors, (4684), 88 states have internal predecessors, (4684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:06:26,412 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 89 states, 89 states have (on average 88.0) internal successors, (7832), 89 states have internal predecessors, (7832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:06:26,413 INFO L81 ComplementDD]: Finished complementDD. Result has 89 states, 89 states have (on average 88.0) internal successors, (7832), 89 states have internal predecessors, (7832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:06:26,413 INFO L186 Difference]: Start difference. First operand has 899 places, 5561 transitions, 138111 flow. Second operand 88 states and 4684 transitions. [2022-01-19 08:06:26,413 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 941 places, 7016 transitions, 186264 flow [2022-01-19 08:06:55,048 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 870 places, 7016 transitions, 183018 flow, removed 1370 selfloop flow, removed 71 redundant places. [2022-01-19 08:06:55,237 INFO L242 Difference]: Finished difference. Result has 914 places, 6290 transitions, 168048 flow [2022-01-19 08:06:55,241 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=135789, PETRI_DIFFERENCE_MINUEND_PLACES=783, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=5561, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2454, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2778, PETRI_DIFFERENCE_SUBTRAHEND_STATES=88, PETRI_FLOW=168048, PETRI_PLACES=914, PETRI_TRANSITIONS=6290} [2022-01-19 08:06:55,242 INFO L334 CegarLoopForPetriNet]: 78 programPoint places, 836 predicate places. [2022-01-19 08:06:55,242 INFO L470 AbstractCegarLoop]: Abstraction has has 914 places, 6290 transitions, 168048 flow [2022-01-19 08:06:55,242 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 51.44736842105263) internal successors, (1955), 38 states have internal predecessors, (1955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:06:55,242 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:06:55,242 INFO L254 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] [2022-01-19 08:06:55,247 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-01-19 08:06:55,447 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-01-19 08:06:55,447 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:06:55,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:06:55,447 INFO L85 PathProgramCache]: Analyzing trace with hash 1155507683, now seen corresponding path program 8 times [2022-01-19 08:06:55,448 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:06:55,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619075321] [2022-01-19 08:06:55,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:06:55,448 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:06:55,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:06:56,597 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:06:56,598 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:06:56,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619075321] [2022-01-19 08:06:56,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619075321] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 08:06:56,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038256682] [2022-01-19 08:06:56,598 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-19 08:06:56,598 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:06:56,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 08:06:56,604 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 08:06:56,604 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-01-19 08:06:56,798 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-19 08:06:56,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 08:06:56,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-19 08:06:56,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 08:06:58,713 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:06:58,713 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 08:07:09,879 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:07:09,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1038256682] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 08:07:09,880 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 08:07:09,880 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 18, 19] total 39 [2022-01-19 08:07:09,880 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643773720] [2022-01-19 08:07:09,880 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 08:07:09,880 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-01-19 08:07:09,880 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:07:09,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-01-19 08:07:09,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=1245, Unknown=0, NotChecked=0, Total=1482 [2022-01-19 08:07:09,881 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 88 [2022-01-19 08:07:09,882 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 914 places, 6290 transitions, 168048 flow. Second operand has 39 states, 39 states have (on average 51.43589743589744) internal successors, (2006), 39 states have internal predecessors, (2006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:07:09,882 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:07:09,882 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 88 [2022-01-19 08:07:09,882 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:08:02,235 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-19 08:08:04,148 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.36s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-19 08:08:05,338 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] Received shutdown request... [2022-01-19 08:08:54,112 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-01-19 08:08:54,126 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-01-19 08:08:55,121 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-01-19 08:08:55,142 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 [2022-01-19 08:08:55,440 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2022-01-19 08:08:55,441 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-01-19 08:08:55,441 WARN L594 AbstractCegarLoop]: Verification canceled: while executing Executor. [2022-01-19 08:08:55,442 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION (1 of 3 remaining) [2022-01-19 08:08:55,443 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION (0 of 3 remaining) [2022-01-19 08:08:55,445 INFO L732 BasicCegarLoop]: Path program histogram: [8, 6, 1, 1] [2022-01-19 08:08:55,447 INFO L230 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-01-19 08:08:55,447 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-01-19 08:08:55,451 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.01 08:08:55 BasicIcfg [2022-01-19 08:08:55,451 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-01-19 08:08:55,452 INFO L158 Benchmark]: Toolchain (without parser) took 861804.58ms. Allocated memory was 377.5MB in the beginning and 4.9GB in the end (delta: 4.5GB). Free memory was 323.6MB in the beginning and 3.4GB in the end (delta: -3.0GB). Peak memory consumption was 4.3GB. Max. memory is 16.0GB. [2022-01-19 08:08:55,452 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 377.5MB. Free memory was 340.1MB in the beginning and 339.9MB in the end (delta: 120.4kB). There was no memory consumed. Max. memory is 16.0GB. [2022-01-19 08:08:55,452 INFO L158 Benchmark]: CACSL2BoogieTranslator took 184.40ms. Allocated memory was 377.5MB in the beginning and 455.1MB in the end (delta: 77.6MB). Free memory was 323.4MB in the beginning and 427.6MB in the end (delta: -104.2MB). Peak memory consumption was 11.3MB. Max. memory is 16.0GB. [2022-01-19 08:08:55,452 INFO L158 Benchmark]: Boogie Procedure Inliner took 18.53ms. Allocated memory is still 455.1MB. Free memory was 427.6MB in the beginning and 426.1MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.0GB. [2022-01-19 08:08:55,453 INFO L158 Benchmark]: Boogie Preprocessor took 13.07ms. Allocated memory is still 455.1MB. Free memory was 426.1MB in the beginning and 425.1MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2022-01-19 08:08:55,453 INFO L158 Benchmark]: RCFGBuilder took 269.19ms. Allocated memory is still 455.1MB. Free memory was 425.1MB in the beginning and 410.9MB in the end (delta: 14.1MB). Peak memory consumption was 14.7MB. Max. memory is 16.0GB. [2022-01-19 08:08:55,453 INFO L158 Benchmark]: TraceAbstraction took 861315.08ms. Allocated memory was 455.1MB in the beginning and 4.9GB in the end (delta: 4.5GB). Free memory was 410.4MB in the beginning and 3.4GB in the end (delta: -3.0GB). Peak memory consumption was 4.3GB. Max. memory is 16.0GB. [2022-01-19 08:08:55,455 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10ms. Allocated memory is still 377.5MB. Free memory was 340.1MB in the beginning and 339.9MB in the end (delta: 120.4kB). There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 184.40ms. Allocated memory was 377.5MB in the beginning and 455.1MB in the end (delta: 77.6MB). Free memory was 323.4MB in the beginning and 427.6MB in the end (delta: -104.2MB). Peak memory consumption was 11.3MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 18.53ms. Allocated memory is still 455.1MB. Free memory was 427.6MB in the beginning and 426.1MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.0GB. * Boogie Preprocessor took 13.07ms. Allocated memory is still 455.1MB. Free memory was 426.1MB in the beginning and 425.1MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 269.19ms. Allocated memory is still 455.1MB. Free memory was 425.1MB in the beginning and 410.9MB in the end (delta: 14.1MB). Peak memory consumption was 14.7MB. Max. memory is 16.0GB. * TraceAbstraction took 861315.08ms. Allocated memory was 455.1MB in the beginning and 4.9GB in the end (delta: 4.5GB). Free memory was 410.4MB in the beginning and 3.4GB in the end (delta: -3.0GB). Peak memory consumption was 4.3GB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 95]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while executing Executor. - 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 executing Executor. - 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 executing Executor. - 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: 861.2s, OverallIterations: 16, TraceHistogramMax: 3, PathProgramHistogramMax: 8, EmptinessCheckTime: 0.0s, AutomataDifference: 770.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 6484 SdHoareTripleChecker+Valid, 87.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 6484 mSDsluCounter, 4765 SdHoareTripleChecker+Invalid, 83.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 285 IncrementalHoareTripleChecker+Unchecked, 6569 mSDsCounter, 1956 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 19009 IncrementalHoareTripleChecker+Invalid, 21250 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1956 mSolverCounterUnsat, 371 mSDtfsCounter, 19009 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2687 GetRequests, 1376 SyntacticMatches, 32 SemanticMatches, 1279 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 55695 ImplicationChecksByTransitivity, 512.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=168048occurred in iteration=15, InterpolantAutomatonStates: 999, 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, 1.6s SatisfiabilityAnalysisTime, 86.0s InterpolantComputationTime, 2028 NumberOfCodeBlocks, 2028 NumberOfCodeBlocksAsserted, 45 NumberOfCheckSat, 2736 ConstructedInterpolants, 29 QuantifiedInterpolants, 69827 SizeOfPredicates, 153 NumberOfNonLiveVariables, 1989 ConjunctsInSsa, 321 ConjunctsInUnsatCore, 38 InterpolantComputations, 7 PerfectInterpolantSequences, 8/282 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