/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/combinations/pc_sfifo_1.cil-2+token_ring.03.cil-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 02:31:29,882 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 02:31:29,884 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 02:31:29,944 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-10 02:31:29,944 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-10 02:31:29,946 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-10 02:31:29,947 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-10 02:31:29,948 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-10 02:31:29,949 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-10 02:31:29,949 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-10 02:31:29,950 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-10 02:31:29,951 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-10 02:31:29,951 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-10 02:31:29,952 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-10 02:31:29,952 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-10 02:31:29,953 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-10 02:31:29,953 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-10 02:31:29,954 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-10 02:31:29,955 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-10 02:31:29,956 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-10 02:31:29,956 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-10 02:31:29,957 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-10 02:31:29,958 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-10 02:31:29,958 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-10 02:31:29,960 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-10 02:31:29,965 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-10 02:31:29,965 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-10 02:31:29,966 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-10 02:31:29,966 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_Default.epf [2022-01-10 02:31:29,978 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 02:31:29,979 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 02:31:29,979 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 02:31:29,979 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 02:31:29,980 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-10 02:31:29,980 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-10 02:31:29,980 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 02:31:29,980 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 02:31:29,980 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 02:31:29,981 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 02:31:29,981 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 02:31:29,981 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 02:31:29,981 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 02:31:29,981 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 02:31:29,981 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 02:31:29,981 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 02:31:29,982 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 02:31:29,982 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 02:31:29,982 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 02:31:29,982 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 02:31:29,982 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 02:31:29,982 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 02:31:29,982 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 02:31:29,983 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 02:31:29,983 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 02:31:29,983 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-10 02:31:29,983 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-10 02:31:29,983 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 02:31:29,983 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 02:31:29,983 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 02:31:29,983 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 02:31:30,157 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 02:31:30,177 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 02:31:30,179 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 02:31:30,180 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 02:31:30,180 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 02:31:30,181 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/combinations/pc_sfifo_1.cil-2+token_ring.03.cil-2.c [2022-01-10 02:31:30,229 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9c50e3ae2/b8f2777af39346c5ad13a9e2a94df201/FLAG32199fa4c [2022-01-10 02:31:30,608 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 02:31:30,612 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/combinations/pc_sfifo_1.cil-2+token_ring.03.cil-2.c [2022-01-10 02:31:30,619 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9c50e3ae2/b8f2777af39346c5ad13a9e2a94df201/FLAG32199fa4c [2022-01-10 02:31:30,638 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9c50e3ae2/b8f2777af39346c5ad13a9e2a94df201 [2022-01-10 02:31:30,640 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 02:31:30,641 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-10 02:31:30,644 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 02:31:30,644 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 02:31:30,647 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 02:31:30,647 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 02:31:30" (1/1) ... [2022-01-10 02:31:30,648 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3b6e03e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:31:30, skipping insertion in model container [2022-01-10 02:31:30,648 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 02:31:30" (1/1) ... [2022-01-10 02:31:30,653 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 02:31:30,680 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 02:31:30,815 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/combinations/pc_sfifo_1.cil-2+token_ring.03.cil-2.c[913,926] [2022-01-10 02:31:30,842 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/combinations/pc_sfifo_1.cil-2+token_ring.03.cil-2.c[5977,5990] [2022-01-10 02:31:30,870 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 02:31:30,877 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 02:31:30,884 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/combinations/pc_sfifo_1.cil-2+token_ring.03.cil-2.c[913,926] [2022-01-10 02:31:30,895 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/combinations/pc_sfifo_1.cil-2+token_ring.03.cil-2.c[5977,5990] [2022-01-10 02:31:30,917 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 02:31:30,937 INFO L208 MainTranslator]: Completed translation [2022-01-10 02:31:30,938 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:31:30 WrapperNode [2022-01-10 02:31:30,938 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 02:31:30,939 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 02:31:30,940 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 02:31:30,940 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 02:31:30,945 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:31:30" (1/1) ... [2022-01-10 02:31:30,965 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:31:30" (1/1) ... [2022-01-10 02:31:30,995 INFO L137 Inliner]: procedures = 54, calls = 57, calls flagged for inlining = 29, calls inlined = 29, statements flattened = 533 [2022-01-10 02:31:30,995 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 02:31:30,996 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 02:31:30,996 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 02:31:30,996 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 02:31:31,005 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:31:30" (1/1) ... [2022-01-10 02:31:31,005 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:31:30" (1/1) ... [2022-01-10 02:31:31,007 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:31:30" (1/1) ... [2022-01-10 02:31:31,007 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:31:30" (1/1) ... [2022-01-10 02:31:31,013 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:31:30" (1/1) ... [2022-01-10 02:31:31,034 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:31:30" (1/1) ... [2022-01-10 02:31:31,036 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:31:30" (1/1) ... [2022-01-10 02:31:31,039 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 02:31:31,039 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 02:31:31,039 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 02:31:31,039 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 02:31:31,047 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:31:30" (1/1) ... [2022-01-10 02:31:31,052 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 02:31:31,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 02:31:31,081 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) [2022-01-10 02:31:31,093 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 [2022-01-10 02:31:31,115 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 02:31:31,120 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-01-10 02:31:31,120 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-01-10 02:31:31,121 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify_threads [2022-01-10 02:31:31,121 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify_threads [2022-01-10 02:31:31,121 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2022-01-10 02:31:31,121 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2022-01-10 02:31:31,121 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2022-01-10 02:31:31,121 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2022-01-10 02:31:31,121 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2022-01-10 02:31:31,121 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2022-01-10 02:31:31,121 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2022-01-10 02:31:31,121 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2022-01-10 02:31:31,121 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2022-01-10 02:31:31,121 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2022-01-10 02:31:31,122 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-10 02:31:31,122 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2022-01-10 02:31:31,122 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2022-01-10 02:31:31,122 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 02:31:31,122 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 02:31:31,122 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2022-01-10 02:31:31,122 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2022-01-10 02:31:31,204 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 02:31:31,206 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 02:31:31,596 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 02:31:31,605 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 02:31:31,605 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2022-01-10 02:31:31,607 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 02:31:31 BoogieIcfgContainer [2022-01-10 02:31:31,607 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 02:31:31,609 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 02:31:31,609 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 02:31:31,613 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 02:31:31,613 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 02:31:30" (1/3) ... [2022-01-10 02:31:31,613 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d1ec26e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 02:31:31, skipping insertion in model container [2022-01-10 02:31:31,613 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:31:30" (2/3) ... [2022-01-10 02:31:31,614 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d1ec26e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 02:31:31, skipping insertion in model container [2022-01-10 02:31:31,614 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 02:31:31" (3/3) ... [2022-01-10 02:31:31,615 INFO L111 eAbstractionObserver]: Analyzing ICFG pc_sfifo_1.cil-2+token_ring.03.cil-2.c [2022-01-10 02:31:31,619 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 02:31:31,619 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-01-10 02:31:31,658 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 02:31:31,663 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=true, 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 [2022-01-10 02:31:31,667 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-01-10 02:31:31,686 INFO L276 IsEmpty]: Start isEmpty. Operand has 229 states, 194 states have (on average 1.5824742268041236) internal successors, (307), 199 states have internal predecessors, (307), 23 states have call successors, (23), 9 states have call predecessors, (23), 9 states have return successors, (23), 22 states have call predecessors, (23), 23 states have call successors, (23) [2022-01-10 02:31:31,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-01-10 02:31:31,696 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:31:31,696 INFO L514 BasicCegarLoop]: 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] [2022-01-10 02:31:31,697 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:31:31,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:31:31,701 INFO L85 PathProgramCache]: Analyzing trace with hash -1071236690, now seen corresponding path program 1 times [2022-01-10 02:31:31,709 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 02:31:31,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030066556] [2022-01-10 02:31:31,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 02:31:31,710 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 02:31:31,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:31:31,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-01-10 02:31:31,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:31:31,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-01-10 02:31:31,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:31:31,972 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 02:31:31,972 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 02:31:31,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030066556] [2022-01-10 02:31:31,973 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030066556] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 02:31:31,973 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 02:31:31,973 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 02:31:31,974 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926886263] [2022-01-10 02:31:31,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 02:31:31,978 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 02:31:31,978 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 02:31:32,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 02:31:32,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 02:31:32,005 INFO L87 Difference]: Start difference. First operand has 229 states, 194 states have (on average 1.5824742268041236) internal successors, (307), 199 states have internal predecessors, (307), 23 states have call successors, (23), 9 states have call predecessors, (23), 9 states have return successors, (23), 22 states have call predecessors, (23), 23 states have call successors, (23) Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-10 02:31:32,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:31:32,238 INFO L93 Difference]: Finished difference Result 512 states and 792 transitions. [2022-01-10 02:31:32,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 02:31:32,240 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 44 [2022-01-10 02:31:32,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:31:32,251 INFO L225 Difference]: With dead ends: 512 [2022-01-10 02:31:32,251 INFO L226 Difference]: Without dead ends: 289 [2022-01-10 02:31:32,255 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 02:31:32,257 INFO L933 BasicCegarLoop]: 345 mSDtfsCounter, 404 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 421 SdHoareTripleChecker+Valid, 589 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 02:31:32,258 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [421 Valid, 589 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 02:31:32,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2022-01-10 02:31:32,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 283. [2022-01-10 02:31:32,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 243 states have (on average 1.448559670781893) internal successors, (352), 247 states have internal predecessors, (352), 27 states have call successors, (27), 11 states have call predecessors, (27), 11 states have return successors, (31), 25 states have call predecessors, (31), 25 states have call successors, (31) [2022-01-10 02:31:32,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 410 transitions. [2022-01-10 02:31:32,321 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 410 transitions. Word has length 44 [2022-01-10 02:31:32,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:31:32,322 INFO L470 AbstractCegarLoop]: Abstraction has 283 states and 410 transitions. [2022-01-10 02:31:32,322 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-10 02:31:32,322 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 410 transitions. [2022-01-10 02:31:32,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-01-10 02:31:32,336 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:31:32,337 INFO L514 BasicCegarLoop]: 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] [2022-01-10 02:31:32,337 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-10 02:31:32,337 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:31:32,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:31:32,338 INFO L85 PathProgramCache]: Analyzing trace with hash -617941460, now seen corresponding path program 1 times [2022-01-10 02:31:32,338 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 02:31:32,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156141018] [2022-01-10 02:31:32,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 02:31:32,338 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 02:31:32,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:31:32,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-01-10 02:31:32,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:31:32,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-01-10 02:31:32,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:31:32,415 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 02:31:32,415 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 02:31:32,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156141018] [2022-01-10 02:31:32,415 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156141018] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 02:31:32,416 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 02:31:32,416 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 02:31:32,416 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544664027] [2022-01-10 02:31:32,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 02:31:32,417 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 02:31:32,417 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 02:31:32,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 02:31:32,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 02:31:32,418 INFO L87 Difference]: Start difference. First operand 283 states and 410 transitions. Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-10 02:31:32,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:31:32,650 INFO L93 Difference]: Finished difference Result 531 states and 750 transitions. [2022-01-10 02:31:32,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 02:31:32,651 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 45 [2022-01-10 02:31:32,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:31:32,665 INFO L225 Difference]: With dead ends: 531 [2022-01-10 02:31:32,665 INFO L226 Difference]: Without dead ends: 407 [2022-01-10 02:31:32,667 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 02:31:32,668 INFO L933 BasicCegarLoop]: 365 mSDtfsCounter, 188 mSDsluCounter, 363 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 728 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 02:31:32,669 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [190 Valid, 728 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 02:31:32,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2022-01-10 02:31:32,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 350. [2022-01-10 02:31:32,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 350 states, 304 states have (on average 1.4342105263157894) internal successors, (436), 308 states have internal predecessors, (436), 30 states have call successors, (30), 14 states have call predecessors, (30), 14 states have return successors, (34), 28 states have call predecessors, (34), 28 states have call successors, (34) [2022-01-10 02:31:32,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 500 transitions. [2022-01-10 02:31:32,698 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 500 transitions. Word has length 45 [2022-01-10 02:31:32,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:31:32,699 INFO L470 AbstractCegarLoop]: Abstraction has 350 states and 500 transitions. [2022-01-10 02:31:32,699 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-10 02:31:32,699 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 500 transitions. [2022-01-10 02:31:32,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-01-10 02:31:32,701 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:31:32,701 INFO L514 BasicCegarLoop]: 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] [2022-01-10 02:31:32,701 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-10 02:31:32,701 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:31:32,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:31:32,702 INFO L85 PathProgramCache]: Analyzing trace with hash -1902298921, now seen corresponding path program 1 times [2022-01-10 02:31:32,702 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 02:31:32,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580428723] [2022-01-10 02:31:32,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 02:31:32,702 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 02:31:32,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:31:32,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-01-10 02:31:32,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:31:32,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-01-10 02:31:32,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:31:32,768 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 02:31:32,768 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 02:31:32,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580428723] [2022-01-10 02:31:32,768 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580428723] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 02:31:32,769 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 02:31:32,769 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 02:31:32,769 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858492595] [2022-01-10 02:31:32,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 02:31:32,769 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 02:31:32,769 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 02:31:32,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 02:31:32,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 02:31:32,770 INFO L87 Difference]: Start difference. First operand 350 states and 500 transitions. Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-10 02:31:32,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:31:32,894 INFO L93 Difference]: Finished difference Result 758 states and 1059 transitions. [2022-01-10 02:31:32,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 02:31:32,895 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 45 [2022-01-10 02:31:32,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:31:32,899 INFO L225 Difference]: With dead ends: 758 [2022-01-10 02:31:32,899 INFO L226 Difference]: Without dead ends: 567 [2022-01-10 02:31:32,904 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 02:31:32,907 INFO L933 BasicCegarLoop]: 340 mSDtfsCounter, 413 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 430 SdHoareTripleChecker+Valid, 582 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 02:31:32,908 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [430 Valid, 582 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 02:31:32,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 567 states. [2022-01-10 02:31:32,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 567 to 515. [2022-01-10 02:31:32,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 515 states, 450 states have (on average 1.3911111111111112) internal successors, (626), 457 states have internal predecessors, (626), 41 states have call successors, (41), 21 states have call predecessors, (41), 22 states have return successors, (51), 37 states have call predecessors, (51), 39 states have call successors, (51) [2022-01-10 02:31:32,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 718 transitions. [2022-01-10 02:31:32,950 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 718 transitions. Word has length 45 [2022-01-10 02:31:32,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:31:32,950 INFO L470 AbstractCegarLoop]: Abstraction has 515 states and 718 transitions. [2022-01-10 02:31:32,950 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-10 02:31:32,951 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 718 transitions. [2022-01-10 02:31:32,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-01-10 02:31:32,956 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:31:32,956 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:31:32,957 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-10 02:31:32,957 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:31:32,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:31:32,960 INFO L85 PathProgramCache]: Analyzing trace with hash -1972716290, now seen corresponding path program 1 times [2022-01-10 02:31:32,960 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 02:31:32,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527309170] [2022-01-10 02:31:32,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 02:31:32,960 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 02:31:32,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:31:33,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-01-10 02:31:33,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:31:33,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-01-10 02:31:33,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:31:33,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-01-10 02:31:33,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:31:33,045 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-10 02:31:33,046 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 02:31:33,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527309170] [2022-01-10 02:31:33,046 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527309170] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 02:31:33,046 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 02:31:33,046 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 02:31:33,046 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296677943] [2022-01-10 02:31:33,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 02:31:33,047 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 02:31:33,047 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 02:31:33,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 02:31:33,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 02:31:33,048 INFO L87 Difference]: Start difference. First operand 515 states and 718 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-10 02:31:33,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:31:33,276 INFO L93 Difference]: Finished difference Result 1099 states and 1503 transitions. [2022-01-10 02:31:33,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 02:31:33,276 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 62 [2022-01-10 02:31:33,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:31:33,282 INFO L225 Difference]: With dead ends: 1099 [2022-01-10 02:31:33,282 INFO L226 Difference]: Without dead ends: 743 [2022-01-10 02:31:33,283 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 02:31:33,292 INFO L933 BasicCegarLoop]: 389 mSDtfsCounter, 172 mSDsluCounter, 394 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 783 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 02:31:33,293 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 783 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 02:31:33,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 743 states. [2022-01-10 02:31:33,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 743 to 705. [2022-01-10 02:31:33,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 705 states, 616 states have (on average 1.3409090909090908) internal successors, (826), 625 states have internal predecessors, (826), 55 states have call successors, (55), 29 states have call predecessors, (55), 32 states have return successors, (75), 51 states have call predecessors, (75), 53 states have call successors, (75) [2022-01-10 02:31:33,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 705 states to 705 states and 956 transitions. [2022-01-10 02:31:33,330 INFO L78 Accepts]: Start accepts. Automaton has 705 states and 956 transitions. Word has length 62 [2022-01-10 02:31:33,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:31:33,330 INFO L470 AbstractCegarLoop]: Abstraction has 705 states and 956 transitions. [2022-01-10 02:31:33,330 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-10 02:31:33,331 INFO L276 IsEmpty]: Start isEmpty. Operand 705 states and 956 transitions. [2022-01-10 02:31:33,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-01-10 02:31:33,332 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:31:33,332 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:31:33,332 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-10 02:31:33,332 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:31:33,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:31:33,333 INFO L85 PathProgramCache]: Analyzing trace with hash -785609067, now seen corresponding path program 1 times [2022-01-10 02:31:33,333 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 02:31:33,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580179326] [2022-01-10 02:31:33,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 02:31:33,333 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 02:31:33,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:31:33,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-01-10 02:31:33,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:31:33,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-01-10 02:31:33,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:31:33,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-01-10 02:31:33,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:31:33,448 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-01-10 02:31:33,449 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 02:31:33,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580179326] [2022-01-10 02:31:33,449 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580179326] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 02:31:33,449 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 02:31:33,449 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 02:31:33,449 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184967226] [2022-01-10 02:31:33,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 02:31:33,450 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 02:31:33,450 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 02:31:33,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 02:31:33,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 02:31:33,450 INFO L87 Difference]: Start difference. First operand 705 states and 956 transitions. Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-10 02:31:33,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:31:33,559 INFO L93 Difference]: Finished difference Result 1358 states and 1809 transitions. [2022-01-10 02:31:33,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 02:31:33,560 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 67 [2022-01-10 02:31:33,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:31:33,564 INFO L225 Difference]: With dead ends: 1358 [2022-01-10 02:31:33,564 INFO L226 Difference]: Without dead ends: 904 [2022-01-10 02:31:33,566 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 02:31:33,566 INFO L933 BasicCegarLoop]: 335 mSDtfsCounter, 400 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 417 SdHoareTripleChecker+Valid, 579 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 02:31:33,566 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [417 Valid, 579 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 02:31:33,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 904 states. [2022-01-10 02:31:33,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 904 to 849. [2022-01-10 02:31:33,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 849 states, 744 states have (on average 1.3131720430107527) internal successors, (977), 755 states have internal predecessors, (977), 63 states have call successors, (63), 35 states have call predecessors, (63), 40 states have return successors, (89), 59 states have call predecessors, (89), 61 states have call successors, (89) [2022-01-10 02:31:33,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 849 states to 849 states and 1129 transitions. [2022-01-10 02:31:33,602 INFO L78 Accepts]: Start accepts. Automaton has 849 states and 1129 transitions. Word has length 67 [2022-01-10 02:31:33,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:31:33,603 INFO L470 AbstractCegarLoop]: Abstraction has 849 states and 1129 transitions. [2022-01-10 02:31:33,603 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-10 02:31:33,603 INFO L276 IsEmpty]: Start isEmpty. Operand 849 states and 1129 transitions. [2022-01-10 02:31:33,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-01-10 02:31:33,605 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:31:33,605 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:31:33,605 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-01-10 02:31:33,605 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:31:33,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:31:33,606 INFO L85 PathProgramCache]: Analyzing trace with hash 1619896469, now seen corresponding path program 1 times [2022-01-10 02:31:33,606 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 02:31:33,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050624572] [2022-01-10 02:31:33,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 02:31:33,606 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 02:31:33,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:31:33,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-01-10 02:31:33,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:31:33,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-01-10 02:31:33,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:31:33,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-01-10 02:31:33,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:31:33,717 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-10 02:31:33,717 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 02:31:33,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050624572] [2022-01-10 02:31:33,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050624572] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 02:31:33,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1471708301] [2022-01-10 02:31:33,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 02:31:33,718 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 02:31:33,718 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 02:31:33,720 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) [2022-01-10 02:31:33,747 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-10 02:31:33,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:31:33,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-10 02:31:33,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:31:34,014 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 02:31:34,015 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 02:31:34,117 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-01-10 02:31:34,118 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1471708301] provided 1 perfect and 1 imperfect interpolant sequences [2022-01-10 02:31:34,118 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-01-10 02:31:34,118 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 4] total 8 [2022-01-10 02:31:34,118 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255327447] [2022-01-10 02:31:34,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 02:31:34,118 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 02:31:34,119 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 02:31:34,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 02:31:34,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-01-10 02:31:34,119 INFO L87 Difference]: Start difference. First operand 849 states and 1129 transitions. Second operand has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-10 02:31:34,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:31:34,197 INFO L93 Difference]: Finished difference Result 905 states and 1197 transitions. [2022-01-10 02:31:34,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 02:31:34,197 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 68 [2022-01-10 02:31:34,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:31:34,201 INFO L225 Difference]: With dead ends: 905 [2022-01-10 02:31:34,201 INFO L226 Difference]: Without dead ends: 902 [2022-01-10 02:31:34,202 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-01-10 02:31:34,202 INFO L933 BasicCegarLoop]: 344 mSDtfsCounter, 557 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 557 SdHoareTripleChecker+Valid, 411 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 02:31:34,202 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [557 Valid, 411 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 02:31:34,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 902 states. [2022-01-10 02:31:34,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 902 to 848. [2022-01-10 02:31:34,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 848 states, 744 states have (on average 1.310483870967742) internal successors, (975), 754 states have internal predecessors, (975), 62 states have call successors, (62), 35 states have call predecessors, (62), 40 states have return successors, (89), 59 states have call predecessors, (89), 61 states have call successors, (89) [2022-01-10 02:31:34,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 848 states to 848 states and 1126 transitions. [2022-01-10 02:31:34,231 INFO L78 Accepts]: Start accepts. Automaton has 848 states and 1126 transitions. Word has length 68 [2022-01-10 02:31:34,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:31:34,231 INFO L470 AbstractCegarLoop]: Abstraction has 848 states and 1126 transitions. [2022-01-10 02:31:34,231 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-10 02:31:34,231 INFO L276 IsEmpty]: Start isEmpty. Operand 848 states and 1126 transitions. [2022-01-10 02:31:34,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-01-10 02:31:34,233 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:31:34,233 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:31:34,256 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-10 02:31:34,447 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-01-10 02:31:34,448 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:31:34,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:31:34,448 INFO L85 PathProgramCache]: Analyzing trace with hash -1323549800, now seen corresponding path program 1 times [2022-01-10 02:31:34,448 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 02:31:34,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92375360] [2022-01-10 02:31:34,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 02:31:34,448 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 02:31:34,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:31:34,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-01-10 02:31:34,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:31:34,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-01-10 02:31:34,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:31:34,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-01-10 02:31:34,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:31:34,554 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-10 02:31:34,554 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 02:31:34,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92375360] [2022-01-10 02:31:34,554 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92375360] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 02:31:34,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111224602] [2022-01-10 02:31:34,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 02:31:34,555 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 02:31:34,555 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 02:31:34,556 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) [2022-01-10 02:31:34,571 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-10 02:31:34,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:31:34,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-10 02:31:34,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:31:34,919 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 02:31:34,921 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 02:31:35,019 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-01-10 02:31:35,019 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [111224602] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 02:31:35,019 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 02:31:35,019 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 4] total 11 [2022-01-10 02:31:35,019 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526452982] [2022-01-10 02:31:35,020 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 02:31:35,021 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-10 02:31:35,021 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 02:31:35,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-10 02:31:35,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2022-01-10 02:31:35,022 INFO L87 Difference]: Start difference. First operand 848 states and 1126 transitions. Second operand has 11 states, 11 states have (on average 13.727272727272727) internal successors, (151), 10 states have internal predecessors, (151), 7 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2022-01-10 02:31:35,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:31:35,935 INFO L93 Difference]: Finished difference Result 2548 states and 3346 transitions. [2022-01-10 02:31:35,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-01-10 02:31:35,936 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 13.727272727272727) internal successors, (151), 10 states have internal predecessors, (151), 7 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) Word has length 69 [2022-01-10 02:31:35,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:31:35,943 INFO L225 Difference]: With dead ends: 2548 [2022-01-10 02:31:35,943 INFO L226 Difference]: Without dead ends: 2004 [2022-01-10 02:31:35,945 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 152 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 461 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=324, Invalid=1482, Unknown=0, NotChecked=0, Total=1806 [2022-01-10 02:31:35,946 INFO L933 BasicCegarLoop]: 449 mSDtfsCounter, 972 mSDsluCounter, 2088 mSDsCounter, 0 mSdLazyCounter, 1121 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 996 SdHoareTripleChecker+Valid, 2537 SdHoareTripleChecker+Invalid, 1197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 1121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-10 02:31:35,946 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [996 Valid, 2537 Invalid, 1197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 1121 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-10 02:31:35,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2004 states. [2022-01-10 02:31:36,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2004 to 1237. [2022-01-10 02:31:36,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1237 states, 1094 states have (on average 1.2879341864716636) internal successors, (1409), 1112 states have internal predecessors, (1409), 82 states have call successors, (82), 49 states have call predecessors, (82), 59 states have return successors, (123), 76 states have call predecessors, (123), 81 states have call successors, (123) [2022-01-10 02:31:36,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1237 states to 1237 states and 1614 transitions. [2022-01-10 02:31:36,041 INFO L78 Accepts]: Start accepts. Automaton has 1237 states and 1614 transitions. Word has length 69 [2022-01-10 02:31:36,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:31:36,041 INFO L470 AbstractCegarLoop]: Abstraction has 1237 states and 1614 transitions. [2022-01-10 02:31:36,042 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 13.727272727272727) internal successors, (151), 10 states have internal predecessors, (151), 7 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2022-01-10 02:31:36,042 INFO L276 IsEmpty]: Start isEmpty. Operand 1237 states and 1614 transitions. [2022-01-10 02:31:36,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-01-10 02:31:36,044 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:31:36,044 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:31:36,065 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-10 02:31:36,259 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-01-10 02:31:36,260 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:31:36,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:31:36,260 INFO L85 PathProgramCache]: Analyzing trace with hash -931355791, now seen corresponding path program 1 times [2022-01-10 02:31:36,260 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 02:31:36,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093126987] [2022-01-10 02:31:36,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 02:31:36,261 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 02:31:36,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:31:36,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-01-10 02:31:36,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:31:36,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-01-10 02:31:36,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:31:36,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-01-10 02:31:36,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:31:36,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-01-10 02:31:36,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:31:36,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-01-10 02:31:36,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:31:36,313 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 02:31:36,313 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 02:31:36,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093126987] [2022-01-10 02:31:36,313 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093126987] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 02:31:36,313 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 02:31:36,313 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-10 02:31:36,313 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658991356] [2022-01-10 02:31:36,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 02:31:36,314 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 02:31:36,314 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 02:31:36,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 02:31:36,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-01-10 02:31:36,314 INFO L87 Difference]: Start difference. First operand 1237 states and 1614 transitions. Second operand has 6 states, 6 states have (on average 11.5) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 02:31:36,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:31:36,941 INFO L93 Difference]: Finished difference Result 1605 states and 2181 transitions. [2022-01-10 02:31:36,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-10 02:31:36,941 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 79 [2022-01-10 02:31:36,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:31:36,946 INFO L225 Difference]: With dead ends: 1605 [2022-01-10 02:31:36,946 INFO L226 Difference]: Without dead ends: 1464 [2022-01-10 02:31:36,947 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-01-10 02:31:36,947 INFO L933 BasicCegarLoop]: 346 mSDtfsCounter, 663 mSDsluCounter, 538 mSDsCounter, 0 mSdLazyCounter, 752 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 677 SdHoareTripleChecker+Valid, 884 SdHoareTripleChecker+Invalid, 842 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 752 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-10 02:31:36,948 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [677 Valid, 884 Invalid, 842 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 752 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-10 02:31:36,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1464 states. [2022-01-10 02:31:36,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1464 to 1379. [2022-01-10 02:31:36,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1379 states, 1217 states have (on average 1.3114215283483976) internal successors, (1596), 1236 states have internal predecessors, (1596), 94 states have call successors, (94), 55 states have call predecessors, (94), 66 states have return successors, (138), 88 states have call predecessors, (138), 93 states have call successors, (138) [2022-01-10 02:31:37,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1379 states to 1379 states and 1828 transitions. [2022-01-10 02:31:37,001 INFO L78 Accepts]: Start accepts. Automaton has 1379 states and 1828 transitions. Word has length 79 [2022-01-10 02:31:37,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:31:37,001 INFO L470 AbstractCegarLoop]: Abstraction has 1379 states and 1828 transitions. [2022-01-10 02:31:37,001 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 02:31:37,001 INFO L276 IsEmpty]: Start isEmpty. Operand 1379 states and 1828 transitions. [2022-01-10 02:31:37,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-01-10 02:31:37,003 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:31:37,003 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:31:37,003 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-01-10 02:31:37,003 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:31:37,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:31:37,004 INFO L85 PathProgramCache]: Analyzing trace with hash -694307595, now seen corresponding path program 1 times [2022-01-10 02:31:37,004 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 02:31:37,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501797836] [2022-01-10 02:31:37,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 02:31:37,004 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 02:31:37,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:31:37,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-01-10 02:31:37,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:31:37,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-01-10 02:31:37,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:31:37,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-01-10 02:31:37,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:31:37,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-01-10 02:31:37,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:31:37,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-01-10 02:31:37,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:31:37,080 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 02:31:37,080 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 02:31:37,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501797836] [2022-01-10 02:31:37,080 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501797836] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 02:31:37,080 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 02:31:37,080 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-10 02:31:37,080 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501733911] [2022-01-10 02:31:37,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 02:31:37,081 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-10 02:31:37,081 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 02:31:37,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-10 02:31:37,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-01-10 02:31:37,081 INFO L87 Difference]: Start difference. First operand 1379 states and 1828 transitions. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 02:31:37,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:31:37,866 INFO L93 Difference]: Finished difference Result 1933 states and 2674 transitions. [2022-01-10 02:31:37,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-10 02:31:37,867 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 79 [2022-01-10 02:31:37,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:31:37,872 INFO L225 Difference]: With dead ends: 1933 [2022-01-10 02:31:37,872 INFO L226 Difference]: Without dead ends: 1650 [2022-01-10 02:31:37,873 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2022-01-10 02:31:37,874 INFO L933 BasicCegarLoop]: 447 mSDtfsCounter, 661 mSDsluCounter, 935 mSDsCounter, 0 mSdLazyCounter, 1173 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 675 SdHoareTripleChecker+Valid, 1382 SdHoareTripleChecker+Invalid, 1245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 1173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-10 02:31:37,874 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [675 Valid, 1382 Invalid, 1245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 1173 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-10 02:31:37,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1650 states. [2022-01-10 02:31:37,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1650 to 1512. [2022-01-10 02:31:37,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1512 states, 1331 states have (on average 1.3260706235912847) internal successors, (1765), 1351 states have internal predecessors, (1765), 106 states have call successors, (106), 61 states have call predecessors, (106), 73 states have return successors, (152), 101 states have call predecessors, (152), 105 states have call successors, (152) [2022-01-10 02:31:37,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1512 states to 1512 states and 2023 transitions. [2022-01-10 02:31:37,927 INFO L78 Accepts]: Start accepts. Automaton has 1512 states and 2023 transitions. Word has length 79 [2022-01-10 02:31:37,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:31:37,927 INFO L470 AbstractCegarLoop]: Abstraction has 1512 states and 2023 transitions. [2022-01-10 02:31:37,928 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 02:31:37,928 INFO L276 IsEmpty]: Start isEmpty. Operand 1512 states and 2023 transitions. [2022-01-10 02:31:37,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-01-10 02:31:37,930 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:31:37,930 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:31:37,930 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-01-10 02:31:37,930 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:31:37,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:31:37,930 INFO L85 PathProgramCache]: Analyzing trace with hash -748700493, now seen corresponding path program 1 times [2022-01-10 02:31:37,931 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 02:31:37,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809423546] [2022-01-10 02:31:37,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 02:31:37,931 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 02:31:37,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:31:37,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-01-10 02:31:37,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:31:37,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-01-10 02:31:37,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:31:37,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-01-10 02:31:37,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:31:37,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-01-10 02:31:37,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:31:37,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-01-10 02:31:37,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:31:37,983 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 02:31:37,983 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 02:31:37,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809423546] [2022-01-10 02:31:37,983 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809423546] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 02:31:37,984 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 02:31:37,984 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-10 02:31:37,984 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57867365] [2022-01-10 02:31:37,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 02:31:37,984 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-10 02:31:37,984 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 02:31:37,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-10 02:31:37,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-01-10 02:31:37,985 INFO L87 Difference]: Start difference. First operand 1512 states and 2023 transitions. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 02:31:38,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:31:38,416 INFO L93 Difference]: Finished difference Result 2066 states and 2875 transitions. [2022-01-10 02:31:38,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 02:31:38,416 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 79 [2022-01-10 02:31:38,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:31:38,421 INFO L225 Difference]: With dead ends: 2066 [2022-01-10 02:31:38,422 INFO L226 Difference]: Without dead ends: 1650 [2022-01-10 02:31:38,423 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2022-01-10 02:31:38,423 INFO L933 BasicCegarLoop]: 290 mSDtfsCounter, 544 mSDsluCounter, 570 mSDsCounter, 0 mSdLazyCounter, 547 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 559 SdHoareTripleChecker+Valid, 860 SdHoareTripleChecker+Invalid, 625 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 547 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 02:31:38,423 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [559 Valid, 860 Invalid, 625 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 547 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 02:31:38,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1650 states. [2022-01-10 02:31:38,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1650 to 1512. [2022-01-10 02:31:38,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1512 states, 1331 states have (on average 1.32381667918858) internal successors, (1762), 1351 states have internal predecessors, (1762), 106 states have call successors, (106), 61 states have call predecessors, (106), 73 states have return successors, (152), 101 states have call predecessors, (152), 105 states have call successors, (152) [2022-01-10 02:31:38,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1512 states to 1512 states and 2020 transitions. [2022-01-10 02:31:38,480 INFO L78 Accepts]: Start accepts. Automaton has 1512 states and 2020 transitions. Word has length 79 [2022-01-10 02:31:38,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:31:38,480 INFO L470 AbstractCegarLoop]: Abstraction has 1512 states and 2020 transitions. [2022-01-10 02:31:38,480 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 02:31:38,480 INFO L276 IsEmpty]: Start isEmpty. Operand 1512 states and 2020 transitions. [2022-01-10 02:31:38,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-01-10 02:31:38,482 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:31:38,482 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:31:38,482 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-01-10 02:31:38,482 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:31:38,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:31:38,483 INFO L85 PathProgramCache]: Analyzing trace with hash -69428239, now seen corresponding path program 1 times [2022-01-10 02:31:38,483 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 02:31:38,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026213641] [2022-01-10 02:31:38,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 02:31:38,483 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 02:31:38,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:31:38,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-01-10 02:31:38,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:31:38,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-01-10 02:31:38,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:31:38,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-01-10 02:31:38,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:31:38,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-01-10 02:31:38,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:31:38,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-01-10 02:31:38,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:31:38,533 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 02:31:38,533 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 02:31:38,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026213641] [2022-01-10 02:31:38,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026213641] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 02:31:38,533 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 02:31:38,533 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-10 02:31:38,533 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516420482] [2022-01-10 02:31:38,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 02:31:38,534 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-10 02:31:38,534 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 02:31:38,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-10 02:31:38,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-01-10 02:31:38,534 INFO L87 Difference]: Start difference. First operand 1512 states and 2020 transitions. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 02:31:38,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:31:38,949 INFO L93 Difference]: Finished difference Result 2062 states and 2858 transitions. [2022-01-10 02:31:38,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 02:31:38,949 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 79 [2022-01-10 02:31:38,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:31:38,955 INFO L225 Difference]: With dead ends: 2062 [2022-01-10 02:31:38,955 INFO L226 Difference]: Without dead ends: 1646 [2022-01-10 02:31:38,956 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2022-01-10 02:31:38,957 INFO L933 BasicCegarLoop]: 296 mSDtfsCounter, 609 mSDsluCounter, 437 mSDsCounter, 0 mSdLazyCounter, 493 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 624 SdHoareTripleChecker+Valid, 733 SdHoareTripleChecker+Invalid, 594 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 493 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 02:31:38,957 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [624 Valid, 733 Invalid, 594 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 493 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 02:31:38,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1646 states. [2022-01-10 02:31:39,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1646 to 1512. [2022-01-10 02:31:39,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1512 states, 1331 states have (on average 1.3215627347858754) internal successors, (1759), 1351 states have internal predecessors, (1759), 106 states have call successors, (106), 61 states have call predecessors, (106), 73 states have return successors, (152), 101 states have call predecessors, (152), 105 states have call successors, (152) [2022-01-10 02:31:39,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1512 states to 1512 states and 2017 transitions. [2022-01-10 02:31:39,015 INFO L78 Accepts]: Start accepts. Automaton has 1512 states and 2017 transitions. Word has length 79 [2022-01-10 02:31:39,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:31:39,015 INFO L470 AbstractCegarLoop]: Abstraction has 1512 states and 2017 transitions. [2022-01-10 02:31:39,015 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 02:31:39,015 INFO L276 IsEmpty]: Start isEmpty. Operand 1512 states and 2017 transitions. [2022-01-10 02:31:39,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-01-10 02:31:39,017 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:31:39,017 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:31:39,017 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-01-10 02:31:39,018 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:31:39,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:31:39,018 INFO L85 PathProgramCache]: Analyzing trace with hash 1892146419, now seen corresponding path program 1 times [2022-01-10 02:31:39,018 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 02:31:39,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824822734] [2022-01-10 02:31:39,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 02:31:39,018 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 02:31:39,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:31:39,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-01-10 02:31:39,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:31:39,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-01-10 02:31:39,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:31:39,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-01-10 02:31:39,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:31:39,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-01-10 02:31:39,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:31:39,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-01-10 02:31:39,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:31:39,070 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 02:31:39,070 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 02:31:39,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824822734] [2022-01-10 02:31:39,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824822734] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 02:31:39,070 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 02:31:39,070 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-10 02:31:39,070 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327376734] [2022-01-10 02:31:39,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 02:31:39,071 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-10 02:31:39,071 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 02:31:39,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-10 02:31:39,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-01-10 02:31:39,071 INFO L87 Difference]: Start difference. First operand 1512 states and 2017 transitions. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 02:31:40,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:31:40,082 INFO L93 Difference]: Finished difference Result 2484 states and 3469 transitions. [2022-01-10 02:31:40,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-10 02:31:40,082 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 79 [2022-01-10 02:31:40,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:31:40,091 INFO L225 Difference]: With dead ends: 2484 [2022-01-10 02:31:40,091 INFO L226 Difference]: Without dead ends: 2068 [2022-01-10 02:31:40,093 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2022-01-10 02:31:40,094 INFO L933 BasicCegarLoop]: 464 mSDtfsCounter, 663 mSDsluCounter, 924 mSDsCounter, 0 mSdLazyCounter, 1260 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 676 SdHoareTripleChecker+Valid, 1388 SdHoareTripleChecker+Invalid, 1336 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 1260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-10 02:31:40,094 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [676 Valid, 1388 Invalid, 1336 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 1260 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-10 02:31:40,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2068 states. [2022-01-10 02:31:40,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2068 to 1772. [2022-01-10 02:31:40,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1772 states, 1555 states have (on average 1.342765273311897) internal successors, (2088), 1577 states have internal predecessors, (2088), 128 states have call successors, (128), 73 states have call predecessors, (128), 87 states have return successors, (182), 125 states have call predecessors, (182), 127 states have call successors, (182) [2022-01-10 02:31:40,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1772 states to 1772 states and 2398 transitions. [2022-01-10 02:31:40,174 INFO L78 Accepts]: Start accepts. Automaton has 1772 states and 2398 transitions. Word has length 79 [2022-01-10 02:31:40,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:31:40,174 INFO L470 AbstractCegarLoop]: Abstraction has 1772 states and 2398 transitions. [2022-01-10 02:31:40,174 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 02:31:40,175 INFO L276 IsEmpty]: Start isEmpty. Operand 1772 states and 2398 transitions. [2022-01-10 02:31:40,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-01-10 02:31:40,177 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:31:40,177 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:31:40,177 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-01-10 02:31:40,178 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:31:40,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:31:40,178 INFO L85 PathProgramCache]: Analyzing trace with hash 2093970353, now seen corresponding path program 1 times [2022-01-10 02:31:40,178 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 02:31:40,178 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060048650] [2022-01-10 02:31:40,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 02:31:40,178 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 02:31:40,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:31:40,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-01-10 02:31:40,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:31:40,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-01-10 02:31:40,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:31:40,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-01-10 02:31:40,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:31:40,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-01-10 02:31:40,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:31:40,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-01-10 02:31:40,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:31:40,248 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 02:31:40,248 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 02:31:40,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060048650] [2022-01-10 02:31:40,248 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060048650] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 02:31:40,249 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 02:31:40,249 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-10 02:31:40,249 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659440513] [2022-01-10 02:31:40,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 02:31:40,249 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-10 02:31:40,249 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 02:31:40,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-10 02:31:40,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-01-10 02:31:40,250 INFO L87 Difference]: Start difference. First operand 1772 states and 2398 transitions. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 02:31:41,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:31:41,171 INFO L93 Difference]: Finished difference Result 3400 states and 4812 transitions. [2022-01-10 02:31:41,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-10 02:31:41,171 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 79 [2022-01-10 02:31:41,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:31:41,180 INFO L225 Difference]: With dead ends: 3400 [2022-01-10 02:31:41,181 INFO L226 Difference]: Without dead ends: 2724 [2022-01-10 02:31:41,183 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2022-01-10 02:31:41,184 INFO L933 BasicCegarLoop]: 416 mSDtfsCounter, 697 mSDsluCounter, 927 mSDsCounter, 0 mSdLazyCounter, 1109 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 715 SdHoareTripleChecker+Valid, 1343 SdHoareTripleChecker+Invalid, 1188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 1109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-10 02:31:41,184 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [715 Valid, 1343 Invalid, 1188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 1109 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-10 02:31:41,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2724 states. [2022-01-10 02:31:41,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2724 to 2293. [2022-01-10 02:31:41,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2293 states, 2006 states have (on average 1.3708873379860418) internal successors, (2750), 2032 states have internal predecessors, (2750), 170 states have call successors, (170), 97 states have call predecessors, (170), 115 states have return successors, (246), 171 states have call predecessors, (246), 169 states have call successors, (246) [2022-01-10 02:31:41,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2293 states to 2293 states and 3166 transitions. [2022-01-10 02:31:41,277 INFO L78 Accepts]: Start accepts. Automaton has 2293 states and 3166 transitions. Word has length 79 [2022-01-10 02:31:41,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:31:41,277 INFO L470 AbstractCegarLoop]: Abstraction has 2293 states and 3166 transitions. [2022-01-10 02:31:41,277 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 02:31:41,278 INFO L276 IsEmpty]: Start isEmpty. Operand 2293 states and 3166 transitions. [2022-01-10 02:31:41,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-01-10 02:31:41,280 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:31:41,280 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:31:41,280 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-01-10 02:31:41,280 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:31:41,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:31:41,281 INFO L85 PathProgramCache]: Analyzing trace with hash -1640297165, now seen corresponding path program 1 times [2022-01-10 02:31:41,281 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 02:31:41,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282865676] [2022-01-10 02:31:41,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 02:31:41,281 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 02:31:41,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:31:41,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-01-10 02:31:41,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:31:41,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-01-10 02:31:41,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:31:41,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-01-10 02:31:41,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:31:41,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-01-10 02:31:41,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:31:41,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-01-10 02:31:41,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:31:41,342 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 02:31:41,342 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 02:31:41,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282865676] [2022-01-10 02:31:41,342 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282865676] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 02:31:41,342 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 02:31:41,342 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-10 02:31:41,344 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657418931] [2022-01-10 02:31:41,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 02:31:41,344 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-10 02:31:41,344 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 02:31:41,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-10 02:31:41,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-01-10 02:31:41,344 INFO L87 Difference]: Start difference. First operand 2293 states and 3166 transitions. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 02:31:41,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:31:41,788 INFO L93 Difference]: Finished difference Result 3794 states and 5413 transitions. [2022-01-10 02:31:41,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 02:31:41,788 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 79 [2022-01-10 02:31:41,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:31:41,799 INFO L225 Difference]: With dead ends: 3794 [2022-01-10 02:31:41,799 INFO L226 Difference]: Without dead ends: 2597 [2022-01-10 02:31:41,802 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2022-01-10 02:31:41,803 INFO L933 BasicCegarLoop]: 287 mSDtfsCounter, 609 mSDsluCounter, 437 mSDsCounter, 0 mSdLazyCounter, 471 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 624 SdHoareTripleChecker+Valid, 724 SdHoareTripleChecker+Invalid, 569 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 02:31:41,803 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [624 Valid, 724 Invalid, 569 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 471 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 02:31:41,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2597 states. [2022-01-10 02:31:41,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2597 to 2293. [2022-01-10 02:31:41,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2293 states, 2006 states have (on average 1.3664007976071784) internal successors, (2741), 2032 states have internal predecessors, (2741), 170 states have call successors, (170), 97 states have call predecessors, (170), 115 states have return successors, (246), 171 states have call predecessors, (246), 169 states have call successors, (246) [2022-01-10 02:31:41,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2293 states to 2293 states and 3157 transitions. [2022-01-10 02:31:41,903 INFO L78 Accepts]: Start accepts. Automaton has 2293 states and 3157 transitions. Word has length 79 [2022-01-10 02:31:41,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:31:41,903 INFO L470 AbstractCegarLoop]: Abstraction has 2293 states and 3157 transitions. [2022-01-10 02:31:41,904 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 02:31:41,904 INFO L276 IsEmpty]: Start isEmpty. Operand 2293 states and 3157 transitions. [2022-01-10 02:31:41,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-01-10 02:31:41,906 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:31:41,906 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:31:41,906 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-01-10 02:31:41,906 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:31:41,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:31:41,906 INFO L85 PathProgramCache]: Analyzing trace with hash -1206568079, now seen corresponding path program 1 times [2022-01-10 02:31:41,907 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 02:31:41,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707036388] [2022-01-10 02:31:41,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 02:31:41,907 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 02:31:41,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:31:41,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-01-10 02:31:41,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:31:41,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-01-10 02:31:41,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:31:41,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-01-10 02:31:41,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:31:41,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-01-10 02:31:41,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:31:41,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-01-10 02:31:41,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:31:41,963 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 02:31:41,963 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 02:31:41,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707036388] [2022-01-10 02:31:41,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707036388] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 02:31:41,963 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 02:31:41,963 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-10 02:31:41,963 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276540422] [2022-01-10 02:31:41,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 02:31:41,963 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 02:31:41,964 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 02:31:41,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 02:31:41,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-01-10 02:31:41,964 INFO L87 Difference]: Start difference. First operand 2293 states and 3157 transitions. Second operand has 6 states, 6 states have (on average 11.5) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 02:31:42,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:31:42,736 INFO L93 Difference]: Finished difference Result 4604 states and 6587 transitions. [2022-01-10 02:31:42,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-10 02:31:42,736 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 79 [2022-01-10 02:31:42,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:31:42,748 INFO L225 Difference]: With dead ends: 4604 [2022-01-10 02:31:42,748 INFO L226 Difference]: Without dead ends: 3408 [2022-01-10 02:31:42,752 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-01-10 02:31:42,753 INFO L933 BasicCegarLoop]: 515 mSDtfsCounter, 805 mSDsluCounter, 613 mSDsCounter, 0 mSdLazyCounter, 851 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 836 SdHoareTripleChecker+Valid, 1128 SdHoareTripleChecker+Invalid, 950 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 851 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-10 02:31:42,754 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [836 Valid, 1128 Invalid, 950 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 851 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-10 02:31:42,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3408 states. [2022-01-10 02:31:42,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3408 to 2949. [2022-01-10 02:31:42,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2949 states, 2569 states have (on average 1.38108213312573) internal successors, (3548), 2604 states have internal predecessors, (3548), 229 states have call successors, (229), 127 states have call predecessors, (229), 149 states have return successors, (315), 225 states have call predecessors, (315), 228 states have call successors, (315) [2022-01-10 02:31:42,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2949 states to 2949 states and 4092 transitions. [2022-01-10 02:31:42,879 INFO L78 Accepts]: Start accepts. Automaton has 2949 states and 4092 transitions. Word has length 79 [2022-01-10 02:31:42,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:31:42,879 INFO L470 AbstractCegarLoop]: Abstraction has 2949 states and 4092 transitions. [2022-01-10 02:31:42,879 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 02:31:42,879 INFO L276 IsEmpty]: Start isEmpty. Operand 2949 states and 4092 transitions. [2022-01-10 02:31:42,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-01-10 02:31:42,882 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:31:42,883 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:31:42,883 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-01-10 02:31:42,883 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:31:42,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:31:42,884 INFO L85 PathProgramCache]: Analyzing trace with hash -1418533864, now seen corresponding path program 1 times [2022-01-10 02:31:42,884 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 02:31:42,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618143338] [2022-01-10 02:31:42,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 02:31:42,884 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 02:31:42,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:31:42,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-01-10 02:31:42,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:31:42,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-01-10 02:31:42,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:31:42,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-01-10 02:31:42,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:31:42,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-01-10 02:31:42,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:31:42,935 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-01-10 02:31:42,935 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 02:31:42,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618143338] [2022-01-10 02:31:42,935 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618143338] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 02:31:42,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544872987] [2022-01-10 02:31:42,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 02:31:42,936 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 02:31:42,936 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 02:31:42,937 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) [2022-01-10 02:31:42,971 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-10 02:31:43,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:31:43,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 02:31:43,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:31:43,136 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-01-10 02:31:43,136 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 02:31:43,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1544872987] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 02:31:43,137 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-10 02:31:43,137 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-01-10 02:31:43,137 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121132117] [2022-01-10 02:31:43,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 02:31:43,137 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 02:31:43,137 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 02:31:43,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 02:31:43,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-01-10 02:31:43,138 INFO L87 Difference]: Start difference. First operand 2949 states and 4092 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-01-10 02:31:43,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:31:43,226 INFO L93 Difference]: Finished difference Result 3672 states and 5030 transitions. [2022-01-10 02:31:43,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 02:31:43,227 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 88 [2022-01-10 02:31:43,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:31:43,235 INFO L225 Difference]: With dead ends: 3672 [2022-01-10 02:31:43,236 INFO L226 Difference]: Without dead ends: 2827 [2022-01-10 02:31:43,238 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-01-10 02:31:43,238 INFO L933 BasicCegarLoop]: 347 mSDtfsCounter, 276 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 276 SdHoareTripleChecker+Valid, 422 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 02:31:43,238 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [276 Valid, 422 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 02:31:43,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2827 states. [2022-01-10 02:31:43,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2827 to 2812. [2022-01-10 02:31:43,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2812 states, 2448 states have (on average 1.3848039215686274) internal successors, (3390), 2482 states have internal predecessors, (3390), 221 states have call successors, (221), 121 states have call predecessors, (221), 141 states have return successors, (301), 216 states have call predecessors, (301), 220 states have call successors, (301) [2022-01-10 02:31:43,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2812 states to 2812 states and 3912 transitions. [2022-01-10 02:31:43,359 INFO L78 Accepts]: Start accepts. Automaton has 2812 states and 3912 transitions. Word has length 88 [2022-01-10 02:31:43,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:31:43,359 INFO L470 AbstractCegarLoop]: Abstraction has 2812 states and 3912 transitions. [2022-01-10 02:31:43,360 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-01-10 02:31:43,360 INFO L276 IsEmpty]: Start isEmpty. Operand 2812 states and 3912 transitions. [2022-01-10 02:31:43,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-01-10 02:31:43,363 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:31:43,364 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:31:43,383 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-10 02:31:43,577 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 02:31:43,578 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:31:43,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:31:43,578 INFO L85 PathProgramCache]: Analyzing trace with hash -483240636, now seen corresponding path program 1 times [2022-01-10 02:31:43,578 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 02:31:43,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128374219] [2022-01-10 02:31:43,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 02:31:43,578 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 02:31:43,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:31:43,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-01-10 02:31:43,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:31:43,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-01-10 02:31:43,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:31:43,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-01-10 02:31:43,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:31:43,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-01-10 02:31:43,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:31:43,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-01-10 02:31:43,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:31:43,633 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 13 proven. 10 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-01-10 02:31:43,634 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 02:31:43,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128374219] [2022-01-10 02:31:43,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [128374219] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 02:31:43,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828724060] [2022-01-10 02:31:43,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 02:31:43,634 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 02:31:43,634 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 02:31:43,635 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) [2022-01-10 02:31:43,636 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-10 02:31:43,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:31:43,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 02:31:43,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:31:43,823 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-01-10 02:31:43,823 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 02:31:43,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [828724060] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 02:31:43,823 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-10 02:31:43,824 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-01-10 02:31:43,824 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396311057] [2022-01-10 02:31:43,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 02:31:43,824 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 02:31:43,824 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 02:31:43,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 02:31:43,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-01-10 02:31:43,825 INFO L87 Difference]: Start difference. First operand 2812 states and 3912 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2022-01-10 02:31:43,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:31:43,921 INFO L93 Difference]: Finished difference Result 3191 states and 4380 transitions. [2022-01-10 02:31:43,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 02:31:43,922 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 103 [2022-01-10 02:31:43,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:31:43,935 INFO L225 Difference]: With dead ends: 3191 [2022-01-10 02:31:43,935 INFO L226 Difference]: Without dead ends: 1865 [2022-01-10 02:31:43,938 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-01-10 02:31:43,938 INFO L933 BasicCegarLoop]: 361 mSDtfsCounter, 62 mSDsluCounter, 291 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 652 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 02:31:43,938 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 652 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 02:31:43,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1865 states. [2022-01-10 02:31:44,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1865 to 1865. [2022-01-10 02:31:44,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1865 states, 1604 states have (on average 1.453865336658354) internal successors, (2332), 1622 states have internal predecessors, (2332), 164 states have call successors, (164), 84 states have call predecessors, (164), 96 states have return successors, (209), 166 states have call predecessors, (209), 164 states have call successors, (209) [2022-01-10 02:31:44,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1865 states to 1865 states and 2705 transitions. [2022-01-10 02:31:44,007 INFO L78 Accepts]: Start accepts. Automaton has 1865 states and 2705 transitions. Word has length 103 [2022-01-10 02:31:44,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:31:44,008 INFO L470 AbstractCegarLoop]: Abstraction has 1865 states and 2705 transitions. [2022-01-10 02:31:44,008 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2022-01-10 02:31:44,008 INFO L276 IsEmpty]: Start isEmpty. Operand 1865 states and 2705 transitions. [2022-01-10 02:31:44,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-01-10 02:31:44,012 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:31:44,012 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:31:44,031 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-10 02:31:44,223 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-01-10 02:31:44,223 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:31:44,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:31:44,224 INFO L85 PathProgramCache]: Analyzing trace with hash -2138787050, now seen corresponding path program 1 times [2022-01-10 02:31:44,224 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 02:31:44,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165128168] [2022-01-10 02:31:44,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 02:31:44,224 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 02:31:44,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:31:44,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-01-10 02:31:44,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:31:44,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-01-10 02:31:44,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:31:44,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-01-10 02:31:44,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:31:44,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-01-10 02:31:44,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:31:44,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-01-10 02:31:44,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:31:44,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-01-10 02:31:44,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:31:44,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-10 02:31:44,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:31:44,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-01-10 02:31:44,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:31:44,294 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-01-10 02:31:44,294 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 02:31:44,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165128168] [2022-01-10 02:31:44,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165128168] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 02:31:44,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218462822] [2022-01-10 02:31:44,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 02:31:44,295 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 02:31:44,295 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 02:31:44,296 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) [2022-01-10 02:31:44,296 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-10 02:31:44,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:31:44,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 492 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 02:31:44,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:31:44,550 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-01-10 02:31:44,550 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 02:31:44,551 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1218462822] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 02:31:44,551 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-10 02:31:44,551 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2022-01-10 02:31:44,551 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804290234] [2022-01-10 02:31:44,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 02:31:44,551 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 02:31:44,552 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 02:31:44,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 02:31:44,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-01-10 02:31:44,552 INFO L87 Difference]: Start difference. First operand 1865 states and 2705 transitions. Second operand has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 2 states have internal predecessors, (92), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-10 02:31:44,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:31:44,692 INFO L93 Difference]: Finished difference Result 5498 states and 8031 transitions. [2022-01-10 02:31:44,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 02:31:44,692 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 2 states have internal predecessors, (92), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 128 [2022-01-10 02:31:44,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:31:44,708 INFO L225 Difference]: With dead ends: 5498 [2022-01-10 02:31:44,709 INFO L226 Difference]: Without dead ends: 3646 [2022-01-10 02:31:44,712 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-01-10 02:31:44,713 INFO L933 BasicCegarLoop]: 232 mSDtfsCounter, 176 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 427 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 02:31:44,713 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [176 Valid, 427 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 02:31:44,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3646 states. [2022-01-10 02:31:44,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3646 to 3616. [2022-01-10 02:31:44,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3616 states, 3113 states have (on average 1.4529392868615483) internal successors, (4523), 3148 states have internal predecessors, (4523), 310 states have call successors, (310), 168 states have call predecessors, (310), 192 states have return successors, (393), 307 states have call predecessors, (393), 310 states have call successors, (393) [2022-01-10 02:31:44,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3616 states to 3616 states and 5226 transitions. [2022-01-10 02:31:44,852 INFO L78 Accepts]: Start accepts. Automaton has 3616 states and 5226 transitions. Word has length 128 [2022-01-10 02:31:44,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:31:44,853 INFO L470 AbstractCegarLoop]: Abstraction has 3616 states and 5226 transitions. [2022-01-10 02:31:44,853 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 2 states have internal predecessors, (92), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-10 02:31:44,853 INFO L276 IsEmpty]: Start isEmpty. Operand 3616 states and 5226 transitions. [2022-01-10 02:31:44,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-01-10 02:31:44,857 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:31:44,857 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:31:44,877 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-01-10 02:31:45,071 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-01-10 02:31:45,071 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:31:45,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:31:45,072 INFO L85 PathProgramCache]: Analyzing trace with hash -1124784650, now seen corresponding path program 1 times [2022-01-10 02:31:45,072 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 02:31:45,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717563305] [2022-01-10 02:31:45,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 02:31:45,072 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 02:31:45,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:31:45,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-01-10 02:31:45,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:31:45,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-01-10 02:31:45,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:31:45,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-01-10 02:31:45,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:31:45,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-01-10 02:31:45,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:31:45,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-01-10 02:31:45,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:31:45,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-01-10 02:31:45,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:31:45,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-10 02:31:45,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:31:45,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-01-10 02:31:45,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:31:45,159 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-01-10 02:31:45,160 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 02:31:45,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717563305] [2022-01-10 02:31:45,160 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717563305] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 02:31:45,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926863044] [2022-01-10 02:31:45,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 02:31:45,161 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 02:31:45,161 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 02:31:45,163 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) [2022-01-10 02:31:45,168 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-10 02:31:45,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:31:45,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 486 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 02:31:45,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:31:45,366 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-01-10 02:31:45,367 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 02:31:45,367 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [926863044] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 02:31:45,367 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-10 02:31:45,367 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2022-01-10 02:31:45,367 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319218011] [2022-01-10 02:31:45,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 02:31:45,368 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 02:31:45,368 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 02:31:45,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 02:31:45,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-01-10 02:31:45,369 INFO L87 Difference]: Start difference. First operand 3616 states and 5226 transitions. Second operand has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-01-10 02:31:45,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:31:45,644 INFO L93 Difference]: Finished difference Result 10677 states and 15626 transitions. [2022-01-10 02:31:45,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 02:31:45,644 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 128 [2022-01-10 02:31:45,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:31:45,665 INFO L225 Difference]: With dead ends: 10677 [2022-01-10 02:31:45,665 INFO L226 Difference]: Without dead ends: 7075 [2022-01-10 02:31:45,675 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-01-10 02:31:45,676 INFO L933 BasicCegarLoop]: 419 mSDtfsCounter, 191 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 639 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 02:31:45,676 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [191 Valid, 639 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 02:31:45,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7075 states. [2022-01-10 02:31:45,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7075 to 7075. [2022-01-10 02:31:45,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7075 states, 6091 states have (on average 1.4457396158266294) internal successors, (8806), 6151 states have internal predecessors, (8806), 599 states have call successors, (599), 336 states have call predecessors, (599), 384 states have return successors, (884), 603 states have call predecessors, (884), 599 states have call successors, (884) [2022-01-10 02:31:45,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7075 states to 7075 states and 10289 transitions. [2022-01-10 02:31:45,994 INFO L78 Accepts]: Start accepts. Automaton has 7075 states and 10289 transitions. Word has length 128 [2022-01-10 02:31:45,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:31:45,994 INFO L470 AbstractCegarLoop]: Abstraction has 7075 states and 10289 transitions. [2022-01-10 02:31:45,994 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-01-10 02:31:45,994 INFO L276 IsEmpty]: Start isEmpty. Operand 7075 states and 10289 transitions. [2022-01-10 02:31:46,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2022-01-10 02:31:46,005 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:31:46,006 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:31:46,033 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-01-10 02:31:46,219 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 02:31:46,220 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:31:46,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:31:46,220 INFO L85 PathProgramCache]: Analyzing trace with hash -1709611055, now seen corresponding path program 1 times [2022-01-10 02:31:46,220 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 02:31:46,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36495901] [2022-01-10 02:31:46,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 02:31:46,220 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 02:31:46,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:31:46,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-01-10 02:31:46,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:31:46,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-01-10 02:31:46,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:31:46,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-01-10 02:31:46,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:31:46,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-01-10 02:31:46,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:31:46,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-01-10 02:31:46,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:31:46,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-01-10 02:31:46,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:31:46,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-10 02:31:46,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:31:46,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2022-01-10 02:31:46,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:31:46,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-10 02:31:46,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:31:46,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2022-01-10 02:31:46,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:31:46,308 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-01-10 02:31:46,308 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 02:31:46,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36495901] [2022-01-10 02:31:46,308 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36495901] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 02:31:46,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [272513059] [2022-01-10 02:31:46,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 02:31:46,308 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 02:31:46,309 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 02:31:46,309 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) [2022-01-10 02:31:46,310 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-01-10 02:31:46,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:31:46,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 602 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 02:31:46,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:31:46,633 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 65 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-01-10 02:31:46,634 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 02:31:46,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [272513059] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 02:31:46,634 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-10 02:31:46,634 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2022-01-10 02:31:46,634 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916260006] [2022-01-10 02:31:46,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 02:31:46,635 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 02:31:46,635 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 02:31:46,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 02:31:46,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-01-10 02:31:46,635 INFO L87 Difference]: Start difference. First operand 7075 states and 10289 transitions. Second operand has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 2 states have internal predecessors, (121), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-01-10 02:31:47,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:31:47,108 INFO L93 Difference]: Finished difference Result 20881 states and 30614 transitions. [2022-01-10 02:31:47,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 02:31:47,108 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 2 states have internal predecessors, (121), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 166 [2022-01-10 02:31:47,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:31:47,144 INFO L225 Difference]: With dead ends: 20881 [2022-01-10 02:31:47,144 INFO L226 Difference]: Without dead ends: 13825 [2022-01-10 02:31:47,160 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-01-10 02:31:47,160 INFO L933 BasicCegarLoop]: 232 mSDtfsCounter, 124 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 427 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 02:31:47,160 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 427 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 02:31:47,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13825 states. [2022-01-10 02:31:47,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13825 to 13711. [2022-01-10 02:31:47,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13711 states, 11823 states have (on average 1.444472638078322) internal successors, (17078), 11941 states have internal predecessors, (17078), 1127 states have call successors, (1127), 664 states have call predecessors, (1127), 760 states have return successors, (1648), 1121 states have call predecessors, (1648), 1127 states have call successors, (1648) [2022-01-10 02:31:47,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13711 states to 13711 states and 19853 transitions. [2022-01-10 02:31:47,793 INFO L78 Accepts]: Start accepts. Automaton has 13711 states and 19853 transitions. Word has length 166 [2022-01-10 02:31:47,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:31:47,793 INFO L470 AbstractCegarLoop]: Abstraction has 13711 states and 19853 transitions. [2022-01-10 02:31:47,793 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 2 states have internal predecessors, (121), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-01-10 02:31:47,793 INFO L276 IsEmpty]: Start isEmpty. Operand 13711 states and 19853 transitions. [2022-01-10 02:31:47,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2022-01-10 02:31:47,882 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:31:47,883 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:31:47,917 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-01-10 02:31:48,083 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 02:31:48,083 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:31:48,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:31:48,084 INFO L85 PathProgramCache]: Analyzing trace with hash 1669305873, now seen corresponding path program 1 times [2022-01-10 02:31:48,084 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 02:31:48,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223021459] [2022-01-10 02:31:48,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 02:31:48,084 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 02:31:48,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:31:48,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-01-10 02:31:48,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:31:48,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-01-10 02:31:48,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:31:48,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-01-10 02:31:48,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:31:48,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-01-10 02:31:48,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:31:48,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-01-10 02:31:48,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:31:48,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-01-10 02:31:48,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:31:48,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-10 02:31:48,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:31:48,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2022-01-10 02:31:48,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:31:48,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-10 02:31:48,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:31:48,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2022-01-10 02:31:48,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:31:48,166 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-01-10 02:31:48,166 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 02:31:48,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223021459] [2022-01-10 02:31:48,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223021459] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 02:31:48,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085501998] [2022-01-10 02:31:48,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 02:31:48,167 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 02:31:48,167 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 02:31:48,168 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) [2022-01-10 02:31:48,207 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-01-10 02:31:48,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:31:48,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 602 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 02:31:48,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:31:48,510 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 65 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-01-10 02:31:48,510 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 02:31:48,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2085501998] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 02:31:48,510 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-10 02:31:48,510 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2022-01-10 02:31:48,510 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120826033] [2022-01-10 02:31:48,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 02:31:48,511 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 02:31:48,511 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 02:31:48,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 02:31:48,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-01-10 02:31:48,511 INFO L87 Difference]: Start difference. First operand 13711 states and 19853 transitions. Second operand has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 2 states have internal predecessors, (121), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-01-10 02:31:49,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:31:49,439 INFO L93 Difference]: Finished difference Result 40647 states and 59354 transitions. [2022-01-10 02:31:49,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 02:31:49,440 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 2 states have internal predecessors, (121), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 166 [2022-01-10 02:31:49,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:31:49,521 INFO L225 Difference]: With dead ends: 40647 [2022-01-10 02:31:49,521 INFO L226 Difference]: Without dead ends: 26955 [2022-01-10 02:31:49,557 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-01-10 02:31:49,558 INFO L933 BasicCegarLoop]: 241 mSDtfsCounter, 126 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 436 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 02:31:49,559 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 436 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 02:31:49,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26955 states. [2022-01-10 02:31:50,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26955 to 26729. [2022-01-10 02:31:50,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26729 states, 23045 states have (on average 1.4411802994141896) internal successors, (33212), 23279 states have internal predecessors, (33212), 2173 states have call successors, (2173), 1318 states have call predecessors, (2173), 1510 states have return successors, (3160), 2147 states have call predecessors, (3160), 2173 states have call successors, (3160) [2022-01-10 02:31:50,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26729 states to 26729 states and 38545 transitions. [2022-01-10 02:31:50,905 INFO L78 Accepts]: Start accepts. Automaton has 26729 states and 38545 transitions. Word has length 166 [2022-01-10 02:31:50,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:31:50,905 INFO L470 AbstractCegarLoop]: Abstraction has 26729 states and 38545 transitions. [2022-01-10 02:31:50,905 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 2 states have internal predecessors, (121), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-01-10 02:31:50,905 INFO L276 IsEmpty]: Start isEmpty. Operand 26729 states and 38545 transitions. [2022-01-10 02:31:50,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2022-01-10 02:31:50,952 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:31:50,952 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:31:50,973 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-01-10 02:31:51,167 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,SelfDestructingSolverStorable20 [2022-01-10 02:31:51,168 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:31:51,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:31:51,168 INFO L85 PathProgramCache]: Analyzing trace with hash -1857787437, now seen corresponding path program 1 times [2022-01-10 02:31:51,168 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 02:31:51,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065750379] [2022-01-10 02:31:51,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 02:31:51,168 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 02:31:51,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:31:51,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-01-10 02:31:51,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:31:51,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-01-10 02:31:51,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:31:51,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-01-10 02:31:51,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:31:51,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-01-10 02:31:51,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:31:51,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-01-10 02:31:51,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:31:51,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-01-10 02:31:51,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:31:51,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-01-10 02:31:51,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:31:51,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-10 02:31:51,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:31:51,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2022-01-10 02:31:51,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:31:51,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-10 02:31:51,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:31:51,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 170 [2022-01-10 02:31:51,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:31:51,268 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2022-01-10 02:31:51,268 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 02:31:51,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065750379] [2022-01-10 02:31:51,270 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065750379] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 02:31:51,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [935693661] [2022-01-10 02:31:51,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 02:31:51,270 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 02:31:51,270 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 02:31:51,271 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) [2022-01-10 02:31:51,272 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-01-10 02:31:51,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:31:51,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 641 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 02:31:51,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:31:51,594 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 103 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-01-10 02:31:51,594 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 02:31:51,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [935693661] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 02:31:51,595 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-10 02:31:51,595 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2022-01-10 02:31:51,595 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865646352] [2022-01-10 02:31:51,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 02:31:51,595 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 02:31:51,595 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 02:31:51,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 02:31:51,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-01-10 02:31:51,596 INFO L87 Difference]: Start difference. First operand 26729 states and 38545 transitions. Second operand has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-01-10 02:31:52,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:31:52,900 INFO L93 Difference]: Finished difference Result 56871 states and 82434 transitions. [2022-01-10 02:31:52,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 02:31:52,911 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 184 [2022-01-10 02:31:52,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:31:53,015 INFO L225 Difference]: With dead ends: 56871 [2022-01-10 02:31:53,016 INFO L226 Difference]: Without dead ends: 30163 [2022-01-10 02:31:53,071 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 205 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-01-10 02:31:53,072 INFO L933 BasicCegarLoop]: 219 mSDtfsCounter, 149 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 02:31:53,072 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 263 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 02:31:53,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30163 states. [2022-01-10 02:31:54,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30163 to 30163. [2022-01-10 02:31:54,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30163 states, 26195 states have (on average 1.4027867913723993) internal successors, (36746), 26429 states have internal predecessors, (36746), 2259 states have call successors, (2259), 1516 states have call predecessors, (2259), 1708 states have return successors, (3282), 2233 states have call predecessors, (3282), 2259 states have call successors, (3282) [2022-01-10 02:31:54,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30163 states to 30163 states and 42287 transitions. [2022-01-10 02:31:54,792 INFO L78 Accepts]: Start accepts. Automaton has 30163 states and 42287 transitions. Word has length 184 [2022-01-10 02:31:54,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:31:54,793 INFO L470 AbstractCegarLoop]: Abstraction has 30163 states and 42287 transitions. [2022-01-10 02:31:54,793 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-01-10 02:31:54,793 INFO L276 IsEmpty]: Start isEmpty. Operand 30163 states and 42287 transitions. [2022-01-10 02:31:54,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2022-01-10 02:31:54,840 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:31:54,840 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:31:54,860 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-01-10 02:31:55,047 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 02:31:55,048 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:31:55,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:31:55,048 INFO L85 PathProgramCache]: Analyzing trace with hash -1009724368, now seen corresponding path program 1 times [2022-01-10 02:31:55,048 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 02:31:55,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178111744] [2022-01-10 02:31:55,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 02:31:55,048 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 02:31:55,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:31:55,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-01-10 02:31:55,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:31:55,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-01-10 02:31:55,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:31:55,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-01-10 02:31:55,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:31:55,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-01-10 02:31:55,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:31:55,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-01-10 02:31:55,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:31:55,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-01-10 02:31:55,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:31:55,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-01-10 02:31:55,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:31:55,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-10 02:31:55,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:31:55,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2022-01-10 02:31:55,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:31:55,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-10 02:31:55,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:31:55,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 170 [2022-01-10 02:31:55,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:31:55,150 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2022-01-10 02:31:55,150 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 02:31:55,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178111744] [2022-01-10 02:31:55,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178111744] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 02:31:55,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794666043] [2022-01-10 02:31:55,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 02:31:55,150 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 02:31:55,150 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 02:31:55,151 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) [2022-01-10 02:31:55,179 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-01-10 02:31:55,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:31:55,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 635 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 02:31:55,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:31:55,456 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 72 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-01-10 02:31:55,457 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 02:31:55,457 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [794666043] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 02:31:55,457 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-10 02:31:55,457 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2022-01-10 02:31:55,457 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341398807] [2022-01-10 02:31:55,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 02:31:55,457 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 02:31:55,457 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 02:31:55,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 02:31:55,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-01-10 02:31:55,458 INFO L87 Difference]: Start difference. First operand 30163 states and 42287 transitions. Second operand has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-01-10 02:31:56,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:31:56,981 INFO L93 Difference]: Finished difference Result 53051 states and 74136 transitions. [2022-01-10 02:31:56,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 02:31:56,981 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 184 [2022-01-10 02:31:56,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:31:57,086 INFO L225 Difference]: With dead ends: 53051 [2022-01-10 02:31:57,086 INFO L226 Difference]: Without dead ends: 32319 [2022-01-10 02:31:57,124 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 205 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-01-10 02:31:57,124 INFO L933 BasicCegarLoop]: 242 mSDtfsCounter, 161 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 447 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 02:31:57,124 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 447 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 02:31:57,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32319 states. [2022-01-10 02:31:58,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32319 to 32223. [2022-01-10 02:31:58,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32223 states, 28071 states have (on average 1.3772932920095473) internal successors, (38662), 28305 states have internal predecessors, (38662), 2311 states have call successors, (2311), 1648 states have call predecessors, (2311), 1840 states have return successors, (3466), 2285 states have call predecessors, (3466), 2311 states have call successors, (3466) [2022-01-10 02:31:59,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32223 states to 32223 states and 44439 transitions. [2022-01-10 02:31:59,070 INFO L78 Accepts]: Start accepts. Automaton has 32223 states and 44439 transitions. Word has length 184 [2022-01-10 02:31:59,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:31:59,070 INFO L470 AbstractCegarLoop]: Abstraction has 32223 states and 44439 transitions. [2022-01-10 02:31:59,070 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-01-10 02:31:59,070 INFO L276 IsEmpty]: Start isEmpty. Operand 32223 states and 44439 transitions. [2022-01-10 02:31:59,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2022-01-10 02:31:59,114 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:31:59,114 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:31:59,133 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-01-10 02:31:59,327 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,SelfDestructingSolverStorable22 [2022-01-10 02:31:59,327 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:31:59,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:31:59,328 INFO L85 PathProgramCache]: Analyzing trace with hash -1450159248, now seen corresponding path program 1 times [2022-01-10 02:31:59,328 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 02:31:59,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017849422] [2022-01-10 02:31:59,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 02:31:59,328 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 02:31:59,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:31:59,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-01-10 02:31:59,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:31:59,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-01-10 02:31:59,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:31:59,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-01-10 02:31:59,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:31:59,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-01-10 02:31:59,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:31:59,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-01-10 02:31:59,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:31:59,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-01-10 02:31:59,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:31:59,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-10 02:31:59,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:31:59,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2022-01-10 02:31:59,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:31:59,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2022-01-10 02:31:59,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:31:59,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-10 02:31:59,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:31:59,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 171 [2022-01-10 02:31:59,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:31:59,408 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2022-01-10 02:31:59,408 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 02:31:59,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017849422] [2022-01-10 02:31:59,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1017849422] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 02:31:59,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583831934] [2022-01-10 02:31:59,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 02:31:59,409 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 02:31:59,409 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 02:31:59,410 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) [2022-01-10 02:31:59,411 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-01-10 02:31:59,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:31:59,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 636 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 02:31:59,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:31:59,697 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 89 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-01-10 02:31:59,698 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 02:31:59,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [583831934] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 02:31:59,698 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-10 02:31:59,698 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2022-01-10 02:31:59,698 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959894395] [2022-01-10 02:31:59,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 02:31:59,699 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 02:31:59,699 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 02:31:59,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 02:31:59,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-01-10 02:31:59,699 INFO L87 Difference]: Start difference. First operand 32223 states and 44439 transitions. Second operand has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) [2022-01-10 02:32:02,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:32:02,774 INFO L93 Difference]: Finished difference Result 95367 states and 132985 transitions. [2022-01-10 02:32:02,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 02:32:02,775 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) Word has length 185 [2022-01-10 02:32:02,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:32:02,949 INFO L225 Difference]: With dead ends: 95367 [2022-01-10 02:32:02,949 INFO L226 Difference]: Without dead ends: 63165 [2022-01-10 02:32:03,001 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 206 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-01-10 02:32:03,002 INFO L933 BasicCegarLoop]: 418 mSDtfsCounter, 189 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 636 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 02:32:03,002 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [189 Valid, 636 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 02:32:03,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63165 states. [2022-01-10 02:32:06,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63165 to 63139. [2022-01-10 02:32:06,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63139 states, 54965 states have (on average 1.3690166469571545) internal successors, (75248), 55433 states have internal predecessors, (75248), 4525 states have call successors, (4525), 3264 states have call predecessors, (4525), 3648 states have return successors, (8126), 4473 states have call predecessors, (8126), 4525 states have call successors, (8126) [2022-01-10 02:32:06,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63139 states to 63139 states and 87899 transitions. [2022-01-10 02:32:06,419 INFO L78 Accepts]: Start accepts. Automaton has 63139 states and 87899 transitions. Word has length 185 [2022-01-10 02:32:06,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:32:06,420 INFO L470 AbstractCegarLoop]: Abstraction has 63139 states and 87899 transitions. [2022-01-10 02:32:06,420 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) [2022-01-10 02:32:06,420 INFO L276 IsEmpty]: Start isEmpty. Operand 63139 states and 87899 transitions. [2022-01-10 02:32:06,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2022-01-10 02:32:06,700 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:32:06,700 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:32:06,718 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-01-10 02:32:06,911 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,SelfDestructingSolverStorable23 [2022-01-10 02:32:06,912 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:32:06,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:32:06,912 INFO L85 PathProgramCache]: Analyzing trace with hash 87421137, now seen corresponding path program 1 times [2022-01-10 02:32:06,912 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 02:32:06,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551389842] [2022-01-10 02:32:06,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 02:32:06,912 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 02:32:06,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:32:06,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-01-10 02:32:06,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:32:06,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-01-10 02:32:06,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:32:06,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-01-10 02:32:06,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:32:06,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-01-10 02:32:06,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:32:06,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-01-10 02:32:06,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:32:06,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-01-10 02:32:06,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:32:06,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-10 02:32:06,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:32:06,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2022-01-10 02:32:06,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:32:06,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2022-01-10 02:32:06,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:32:06,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-10 02:32:06,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:32:07,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 171 [2022-01-10 02:32:07,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:32:07,002 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2022-01-10 02:32:07,002 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 02:32:07,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551389842] [2022-01-10 02:32:07,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551389842] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 02:32:07,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703392502] [2022-01-10 02:32:07,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 02:32:07,002 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 02:32:07,002 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 02:32:07,003 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) [2022-01-10 02:32:07,015 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-01-10 02:32:07,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:32:07,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 639 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 02:32:07,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:32:07,337 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 93 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-01-10 02:32:07,337 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 02:32:07,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [703392502] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 02:32:07,337 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-10 02:32:07,337 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2022-01-10 02:32:07,338 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487676837] [2022-01-10 02:32:07,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 02:32:07,338 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 02:32:07,338 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 02:32:07,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 02:32:07,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-01-10 02:32:07,339 INFO L87 Difference]: Start difference. First operand 63139 states and 87899 transitions. Second operand has 3 states, 3 states have (on average 46.0) internal successors, (138), 3 states have internal predecessors, (138), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-01-10 02:32:12,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:32:12,835 INFO L93 Difference]: Finished difference Result 179655 states and 254083 transitions. [2022-01-10 02:32:12,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 02:32:12,835 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 46.0) internal successors, (138), 3 states have internal predecessors, (138), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 185 [2022-01-10 02:32:12,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:32:13,370 INFO L225 Difference]: With dead ends: 179655 [2022-01-10 02:32:13,370 INFO L226 Difference]: Without dead ends: 116549 [2022-01-10 02:32:13,481 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 206 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-01-10 02:32:13,481 INFO L933 BasicCegarLoop]: 415 mSDtfsCounter, 177 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 633 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 02:32:13,481 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 633 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 02:32:13,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116549 states. [2022-01-10 02:32:19,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116549 to 116547. [2022-01-10 02:32:19,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116547 states, 101097 states have (on average 1.3641156513051822) internal successors, (137908), 102033 states have internal predecessors, (137908), 8601 states have call successors, (8601), 6080 states have call predecessors, (8601), 6848 states have return successors, (18420), 8497 states have call predecessors, (18420), 8601 states have call successors, (18420) [2022-01-10 02:32:20,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116547 states to 116547 states and 164929 transitions. [2022-01-10 02:32:20,062 INFO L78 Accepts]: Start accepts. Automaton has 116547 states and 164929 transitions. Word has length 185 [2022-01-10 02:32:20,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:32:20,062 INFO L470 AbstractCegarLoop]: Abstraction has 116547 states and 164929 transitions. [2022-01-10 02:32:20,062 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.0) internal successors, (138), 3 states have internal predecessors, (138), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-01-10 02:32:20,063 INFO L276 IsEmpty]: Start isEmpty. Operand 116547 states and 164929 transitions. [2022-01-10 02:32:20,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2022-01-10 02:32:20,238 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:32:20,238 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:32:20,254 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-01-10 02:32:20,438 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-01-10 02:32:20,438 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:32:20,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:32:20,439 INFO L85 PathProgramCache]: Analyzing trace with hash 1959075529, now seen corresponding path program 1 times [2022-01-10 02:32:20,439 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 02:32:20,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776702560] [2022-01-10 02:32:20,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 02:32:20,439 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 02:32:20,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:32:20,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-01-10 02:32:20,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:32:20,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-01-10 02:32:20,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:32:20,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-01-10 02:32:20,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:32:20,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-01-10 02:32:20,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:32:20,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-01-10 02:32:20,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:32:20,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-01-10 02:32:20,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:32:20,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-10 02:32:20,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:32:20,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2022-01-10 02:32:20,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:32:20,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2022-01-10 02:32:20,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:32:20,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-10 02:32:20,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:32:20,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 171 [2022-01-10 02:32:20,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:32:20,515 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-01-10 02:32:20,515 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 02:32:20,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776702560] [2022-01-10 02:32:20,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776702560] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 02:32:20,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693769446] [2022-01-10 02:32:20,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 02:32:20,515 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 02:32:20,515 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 02:32:20,516 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 02:32:20,517 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-01-10 02:32:20,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:32:20,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 639 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 02:32:20,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:32:20,826 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 90 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-01-10 02:32:20,826 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 02:32:20,826 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [693769446] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 02:32:20,827 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-10 02:32:20,827 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2022-01-10 02:32:20,827 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562930777] [2022-01-10 02:32:20,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 02:32:20,827 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 02:32:20,827 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 02:32:20,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 02:32:20,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-01-10 02:32:20,828 INFO L87 Difference]: Start difference. First operand 116547 states and 164929 transitions. Second operand has 3 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-01-10 02:32:26,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:32:26,452 INFO L93 Difference]: Finished difference Result 198485 states and 288518 transitions. [2022-01-10 02:32:26,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 02:32:26,453 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 185 [2022-01-10 02:32:26,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:32:26,913 INFO L225 Difference]: With dead ends: 198485 [2022-01-10 02:32:26,914 INFO L226 Difference]: Without dead ends: 105051 [2022-01-10 02:32:27,077 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 206 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-01-10 02:32:27,077 INFO L933 BasicCegarLoop]: 218 mSDtfsCounter, 146 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 02:32:27,077 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 261 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 02:32:27,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105051 states. [2022-01-10 02:32:31,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105051 to 78323.