/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_Bitvector.epf -i ../../../trunk/examples/svcomp/combinations/pc_sfifo_1.cil-2+token_ring.11.cil-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 08:19:21,022 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 08:19:21,024 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 08:19:21,101 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-10 08:19:21,101 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-10 08:19:21,102 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-10 08:19:21,107 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-10 08:19:21,110 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-10 08:19:21,114 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-10 08:19:21,115 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-10 08:19:21,115 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-10 08:19:21,116 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-10 08:19:21,116 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-10 08:19:21,117 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-10 08:19:21,118 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-10 08:19:21,118 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-10 08:19:21,119 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-10 08:19:21,120 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-10 08:19:21,121 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-10 08:19:21,122 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-10 08:19:21,122 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-10 08:19:21,127 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-10 08:19:21,129 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-10 08:19:21,130 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-10 08:19:21,138 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-01-10 08:19:21,138 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-01-10 08:19:21,138 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-01-10 08:19:21,139 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-01-10 08:19:21,139 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-01-10 08:19:21,139 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2022-01-10 08:19:21,142 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-10 08:19:21,143 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-10 08:19:21,143 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-10 08:19:21,148 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_Bitvector.epf [2022-01-10 08:19:21,173 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 08:19:21,173 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 08:19:21,173 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 08:19:21,173 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 08:19:21,173 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-10 08:19:21,174 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-10 08:19:21,174 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 08:19:21,174 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 08:19:21,174 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 08:19:21,174 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 08:19:21,174 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 08:19:21,174 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 08:19:21,174 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 08:19:21,174 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 08:19:21,175 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 08:19:21,175 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 08:19:21,175 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 08:19:21,175 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 08:19:21,175 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 08:19:21,175 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 08:19:21,175 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 08:19:21,175 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 08:19:21,175 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 08:19:21,175 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 08:19:21,175 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 08:19:21,176 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 08:19:21,176 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 08:19:21,176 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-01-10 08:19:21,176 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-01-10 08:19:21,176 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 08:19:21,176 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 08:19:21,176 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 08:19:21,176 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 08:19:21,176 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 08:19:21,364 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 08:19:21,378 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 08:19:21,379 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 08:19:21,380 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 08:19:21,389 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 08:19:21,390 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/combinations/pc_sfifo_1.cil-2+token_ring.11.cil-2.c [2022-01-10 08:19:21,429 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4eeac9459/cfdfc4a2b9a34911a961d423d4a4a739/FLAG9fe732ccb [2022-01-10 08:19:21,758 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 08:19:21,759 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/combinations/pc_sfifo_1.cil-2+token_ring.11.cil-2.c [2022-01-10 08:19:21,777 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4eeac9459/cfdfc4a2b9a34911a961d423d4a4a739/FLAG9fe732ccb [2022-01-10 08:19:22,167 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4eeac9459/cfdfc4a2b9a34911a961d423d4a4a739 [2022-01-10 08:19:22,170 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 08:19:22,172 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-10 08:19:22,175 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 08:19:22,175 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 08:19:22,178 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 08:19:22,178 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 08:19:22" (1/1) ... [2022-01-10 08:19:22,181 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@bf93876 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:19:22, skipping insertion in model container [2022-01-10 08:19:22,181 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 08:19:22" (1/1) ... [2022-01-10 08:19:22,188 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 08:19:22,258 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 08:19:22,427 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.11.cil-2.c[913,926] [2022-01-10 08:19:22,470 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.11.cil-2.c[5977,5990] [2022-01-10 08:19:22,563 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 08:19:22,574 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 08:19:22,583 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.11.cil-2.c[913,926] [2022-01-10 08:19:22,600 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.11.cil-2.c[5977,5990] [2022-01-10 08:19:22,627 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 08:19:22,646 INFO L208 MainTranslator]: Completed translation [2022-01-10 08:19:22,647 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:19:22 WrapperNode [2022-01-10 08:19:22,649 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 08:19:22,650 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 08:19:22,650 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 08:19:22,650 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 08:19:22,655 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:19:22" (1/1) ... [2022-01-10 08:19:22,680 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:19:22" (1/1) ... [2022-01-10 08:19:22,715 INFO L137 Inliner]: procedures = 71, calls = 81, calls flagged for inlining = 45, calls inlined = 45, statements flattened = 958 [2022-01-10 08:19:22,715 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 08:19:22,716 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 08:19:22,716 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 08:19:22,716 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 08:19:22,722 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:19:22" (1/1) ... [2022-01-10 08:19:22,722 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:19:22" (1/1) ... [2022-01-10 08:19:22,725 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:19:22" (1/1) ... [2022-01-10 08:19:22,726 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:19:22" (1/1) ... [2022-01-10 08:19:22,734 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:19:22" (1/1) ... [2022-01-10 08:19:22,755 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:19:22" (1/1) ... [2022-01-10 08:19:22,759 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:19:22" (1/1) ... [2022-01-10 08:19:22,763 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 08:19:22,764 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 08:19:22,764 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 08:19:22,764 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 08:19:22,764 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:19:22" (1/1) ... [2022-01-10 08:19:22,769 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 08:19:22,780 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 08:19:22,803 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 08:19:22,810 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 08:19:22,837 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 08:19:22,837 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-01-10 08:19:22,837 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-01-10 08:19:22,837 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify_threads [2022-01-10 08:19:22,837 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify_threads [2022-01-10 08:19:22,837 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2022-01-10 08:19:22,837 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2022-01-10 08:19:22,838 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2022-01-10 08:19:22,838 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2022-01-10 08:19:22,838 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2022-01-10 08:19:22,838 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2022-01-10 08:19:22,838 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2022-01-10 08:19:22,838 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2022-01-10 08:19:22,838 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 08:19:22,838 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2022-01-10 08:19:22,838 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2022-01-10 08:19:22,838 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2022-01-10 08:19:22,838 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2022-01-10 08:19:22,838 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 08:19:22,839 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 08:19:22,839 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2022-01-10 08:19:22,839 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2022-01-10 08:19:22,944 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 08:19:22,945 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 08:19:23,550 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 08:19:23,562 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 08:19:23,562 INFO L299 CfgBuilder]: Removed 18 assume(true) statements. [2022-01-10 08:19:23,564 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 08:19:23 BoogieIcfgContainer [2022-01-10 08:19:23,564 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 08:19:23,565 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 08:19:23,565 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 08:19:23,568 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 08:19:23,568 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 08:19:22" (1/3) ... [2022-01-10 08:19:23,569 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25b8ae8b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 08:19:23, skipping insertion in model container [2022-01-10 08:19:23,569 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:19:22" (2/3) ... [2022-01-10 08:19:23,569 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25b8ae8b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 08:19:23, skipping insertion in model container [2022-01-10 08:19:23,569 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 08:19:23" (3/3) ... [2022-01-10 08:19:23,570 INFO L111 eAbstractionObserver]: Analyzing ICFG pc_sfifo_1.cil-2+token_ring.11.cil-2.c [2022-01-10 08:19:23,574 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 08:19:23,574 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-01-10 08:19:23,604 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 08:19:23,608 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 08:19:23,608 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-01-10 08:19:23,634 INFO L276 IsEmpty]: Start isEmpty. Operand has 429 states, 386 states have (on average 1.645077720207254) internal successors, (635), 391 states have internal predecessors, (635), 31 states have call successors, (31), 9 states have call predecessors, (31), 9 states have return successors, (31), 30 states have call predecessors, (31), 31 states have call successors, (31) [2022-01-10 08:19:23,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-01-10 08:19:23,639 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:19:23,639 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 08:19:23,640 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:19:23,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:19:23,643 INFO L85 PathProgramCache]: Analyzing trace with hash -1865263090, now seen corresponding path program 1 times [2022-01-10 08:19:23,652 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:19:23,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [76206967] [2022-01-10 08:19:23,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:19:23,653 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:19:23,653 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:19:23,655 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 08:19:23,672 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-01-10 08:19:23,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:19:23,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 08:19:23,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:19:23,911 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 08:19:23,912 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:19:23,912 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:19:23,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [76206967] [2022-01-10 08:19:23,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [76206967] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:19:23,913 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:19:23,913 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 08:19:23,914 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189292083] [2022-01-10 08:19:23,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:19:23,918 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 08:19:23,918 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:19:23,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 08:19:23,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:19:23,936 INFO L87 Difference]: Start difference. First operand has 429 states, 386 states have (on average 1.645077720207254) internal successors, (635), 391 states have internal predecessors, (635), 31 states have call successors, (31), 9 states have call predecessors, (31), 9 states have return successors, (31), 30 states have call predecessors, (31), 31 states have call successors, (31) Second operand has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (3), 2 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 08:19:24,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:19:24,018 INFO L93 Difference]: Finished difference Result 893 states and 1448 transitions. [2022-01-10 08:19:24,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 08:19:24,020 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (3), 2 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 08:19:24,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:19:24,029 INFO L225 Difference]: With dead ends: 893 [2022-01-10 08:19:24,029 INFO L226 Difference]: Without dead ends: 478 [2022-01-10 08:19:24,033 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:19:24,036 INFO L933 BasicCegarLoop]: 672 mSDtfsCounter, 637 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 637 SdHoareTripleChecker+Valid, 757 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 08:19:24,036 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [637 Valid, 757 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:19:24,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 478 states. [2022-01-10 08:19:24,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 478 to 474. [2022-01-10 08:19:24,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 474 states, 427 states have (on average 1.5292740046838407) internal successors, (653), 430 states have internal predecessors, (653), 35 states have call successors, (35), 11 states have call predecessors, (35), 10 states have return successors, (37), 33 states have call predecessors, (37), 33 states have call successors, (37) [2022-01-10 08:19:24,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 474 states to 474 states and 725 transitions. [2022-01-10 08:19:24,095 INFO L78 Accepts]: Start accepts. Automaton has 474 states and 725 transitions. Word has length 44 [2022-01-10 08:19:24,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:19:24,095 INFO L470 AbstractCegarLoop]: Abstraction has 474 states and 725 transitions. [2022-01-10 08:19:24,095 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (3), 2 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 08:19:24,095 INFO L276 IsEmpty]: Start isEmpty. Operand 474 states and 725 transitions. [2022-01-10 08:19:24,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-01-10 08:19:24,097 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:19:24,098 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 08:19:24,108 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2022-01-10 08:19:24,304 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 08:19:24,305 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:19:24,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:19:24,306 INFO L85 PathProgramCache]: Analyzing trace with hash -1076469852, now seen corresponding path program 1 times [2022-01-10 08:19:24,306 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:19:24,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1467442900] [2022-01-10 08:19:24,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:19:24,308 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:19:24,308 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:19:24,309 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 08:19:24,311 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-01-10 08:19:24,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:19:24,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 08:19:24,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:19:24,457 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 08:19:24,457 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:19:24,458 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:19:24,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1467442900] [2022-01-10 08:19:24,458 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1467442900] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:19:24,458 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:19:24,458 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 08:19:24,458 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672501388] [2022-01-10 08:19:24,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:19:24,459 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 08:19:24,459 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:19:24,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 08:19:24,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:19:24,460 INFO L87 Difference]: Start difference. First operand 474 states and 725 transitions. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 2 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 08:19:24,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:19:24,487 INFO L93 Difference]: Finished difference Result 682 states and 1013 transitions. [2022-01-10 08:19:24,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 08:19:24,487 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 2 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 45 [2022-01-10 08:19:24,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:19:24,490 INFO L225 Difference]: With dead ends: 682 [2022-01-10 08:19:24,490 INFO L226 Difference]: Without dead ends: 567 [2022-01-10 08:19:24,490 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:19:24,491 INFO L933 BasicCegarLoop]: 674 mSDtfsCounter, 62 mSDsluCounter, 622 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 1296 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 08:19:24,491 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 1296 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:19:24,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 567 states. [2022-01-10 08:19:24,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 567 to 541. [2022-01-10 08:19:24,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 541 states, 488 states have (on average 1.5102459016393444) internal successors, (737), 491 states have internal predecessors, (737), 38 states have call successors, (38), 14 states have call predecessors, (38), 13 states have return successors, (41), 36 states have call predecessors, (41), 36 states have call successors, (41) [2022-01-10 08:19:24,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 541 states to 541 states and 816 transitions. [2022-01-10 08:19:24,509 INFO L78 Accepts]: Start accepts. Automaton has 541 states and 816 transitions. Word has length 45 [2022-01-10 08:19:24,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:19:24,509 INFO L470 AbstractCegarLoop]: Abstraction has 541 states and 816 transitions. [2022-01-10 08:19:24,509 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 2 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 08:19:24,509 INFO L276 IsEmpty]: Start isEmpty. Operand 541 states and 816 transitions. [2022-01-10 08:19:24,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-01-10 08:19:24,511 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:19:24,511 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 08:19:24,517 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-01-10 08:19:24,717 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 08:19:24,720 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:19:24,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:19:24,720 INFO L85 PathProgramCache]: Analyzing trace with hash 1934139983, now seen corresponding path program 1 times [2022-01-10 08:19:24,720 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:19:24,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2036987999] [2022-01-10 08:19:24,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:19:24,721 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:19:24,721 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:19:24,722 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 08:19:24,723 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-01-10 08:19:24,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:19:24,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 08:19:24,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:19:24,855 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 08:19:24,855 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:19:24,855 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:19:24,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2036987999] [2022-01-10 08:19:24,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2036987999] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:19:24,855 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:19:24,855 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 08:19:24,856 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127774282] [2022-01-10 08:19:24,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:19:24,856 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 08:19:24,856 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:19:24,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 08:19:24,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:19:24,857 INFO L87 Difference]: Start difference. First operand 541 states and 816 transitions. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 2 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 08:19:24,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:19:24,882 INFO L93 Difference]: Finished difference Result 894 states and 1304 transitions. [2022-01-10 08:19:24,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 08:19:24,883 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 2 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 45 [2022-01-10 08:19:24,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:19:24,885 INFO L225 Difference]: With dead ends: 894 [2022-01-10 08:19:24,885 INFO L226 Difference]: Without dead ends: 712 [2022-01-10 08:19:24,886 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:19:24,887 INFO L933 BasicCegarLoop]: 659 mSDtfsCounter, 617 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 617 SdHoareTripleChecker+Valid, 737 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 08:19:24,887 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [617 Valid, 737 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:19:24,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 712 states. [2022-01-10 08:19:24,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 712 to 698. [2022-01-10 08:19:24,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 698 states, 627 states have (on average 1.4657097288676235) internal successors, (919), 632 states have internal predecessors, (919), 49 states have call successors, (49), 21 states have call predecessors, (49), 20 states have return successors, (57), 45 states have call predecessors, (57), 47 states have call successors, (57) [2022-01-10 08:19:24,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 698 states to 698 states and 1025 transitions. [2022-01-10 08:19:24,905 INFO L78 Accepts]: Start accepts. Automaton has 698 states and 1025 transitions. Word has length 45 [2022-01-10 08:19:24,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:19:24,905 INFO L470 AbstractCegarLoop]: Abstraction has 698 states and 1025 transitions. [2022-01-10 08:19:24,905 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 2 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 08:19:24,905 INFO L276 IsEmpty]: Start isEmpty. Operand 698 states and 1025 transitions. [2022-01-10 08:19:24,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-01-10 08:19:24,907 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:19:24,907 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 08:19:24,926 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-01-10 08:19:25,127 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 08:19:25,127 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:19:25,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:19:25,128 INFO L85 PathProgramCache]: Analyzing trace with hash -850776738, now seen corresponding path program 1 times [2022-01-10 08:19:25,128 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:19:25,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1938721487] [2022-01-10 08:19:25,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:19:25,129 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:19:25,129 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:19:25,129 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 08:19:25,175 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-01-10 08:19:25,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:19:25,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 08:19:25,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:19:25,325 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 08:19:25,326 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:19:25,326 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:19:25,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1938721487] [2022-01-10 08:19:25,326 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1938721487] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:19:25,326 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:19:25,326 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 08:19:25,326 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118968658] [2022-01-10 08:19:25,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:19:25,327 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 08:19:25,327 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:19:25,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 08:19:25,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:19:25,328 INFO L87 Difference]: Start difference. First operand 698 states and 1025 transitions. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 3 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-10 08:19:25,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:19:25,363 INFO L93 Difference]: Finished difference Result 1210 states and 1722 transitions. [2022-01-10 08:19:25,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 08:19:25,364 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 3 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 62 [2022-01-10 08:19:25,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:19:25,367 INFO L225 Difference]: With dead ends: 1210 [2022-01-10 08:19:25,367 INFO L226 Difference]: Without dead ends: 871 [2022-01-10 08:19:25,368 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:19:25,368 INFO L933 BasicCegarLoop]: 705 mSDtfsCounter, 50 mSDsluCounter, 637 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 1342 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 08:19:25,368 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 1342 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:19:25,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 871 states. [2022-01-10 08:19:25,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 871 to 871. [2022-01-10 08:19:25,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 871 states, 778 states have (on average 1.4138817480719794) internal successors, (1100), 783 states have internal predecessors, (1100), 63 states have call successors, (63), 29 states have call predecessors, (63), 28 states have return successors, (79), 59 states have call predecessors, (79), 61 states have call successors, (79) [2022-01-10 08:19:25,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 871 states to 871 states and 1242 transitions. [2022-01-10 08:19:25,393 INFO L78 Accepts]: Start accepts. Automaton has 871 states and 1242 transitions. Word has length 62 [2022-01-10 08:19:25,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:19:25,393 INFO L470 AbstractCegarLoop]: Abstraction has 871 states and 1242 transitions. [2022-01-10 08:19:25,393 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 3 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-10 08:19:25,393 INFO L276 IsEmpty]: Start isEmpty. Operand 871 states and 1242 transitions. [2022-01-10 08:19:25,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-01-10 08:19:25,395 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:19:25,395 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 08:19:25,415 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0 [2022-01-10 08:19:25,601 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 08:19:25,602 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:19:25,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:19:25,609 INFO L85 PathProgramCache]: Analyzing trace with hash 33645861, now seen corresponding path program 1 times [2022-01-10 08:19:25,610 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:19:25,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [801485582] [2022-01-10 08:19:25,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:19:25,611 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:19:25,611 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:19:25,612 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 08:19:25,613 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-01-10 08:19:25,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:19:25,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 08:19:25,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:19:25,810 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 08:19:25,810 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:19:25,810 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:19:25,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [801485582] [2022-01-10 08:19:25,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [801485582] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:19:25,811 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:19:25,811 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 08:19:25,811 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188767066] [2022-01-10 08:19:25,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:19:25,812 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 08:19:25,812 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:19:25,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 08:19:25,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:19:25,813 INFO L87 Difference]: Start difference. First operand 871 states and 1242 transitions. Second operand has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-10 08:19:25,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:19:25,847 INFO L93 Difference]: Finished difference Result 1418 states and 1963 transitions. [2022-01-10 08:19:25,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 08:19:25,848 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 67 [2022-01-10 08:19:25,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:19:25,851 INFO L225 Difference]: With dead ends: 1418 [2022-01-10 08:19:25,851 INFO L226 Difference]: Without dead ends: 998 [2022-01-10 08:19:25,852 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:19:25,853 INFO L933 BasicCegarLoop]: 654 mSDtfsCounter, 604 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 604 SdHoareTripleChecker+Valid, 732 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 08:19:25,853 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [604 Valid, 732 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:19:25,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 998 states. [2022-01-10 08:19:25,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 998 to 998. [2022-01-10 08:19:25,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 998 states, 891 states have (on average 1.382716049382716) internal successors, (1232), 896 states have internal predecessors, (1232), 71 states have call successors, (71), 35 states have call predecessors, (71), 34 states have return successors, (91), 67 states have call predecessors, (91), 69 states have call successors, (91) [2022-01-10 08:19:25,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 998 states to 998 states and 1394 transitions. [2022-01-10 08:19:25,885 INFO L78 Accepts]: Start accepts. Automaton has 998 states and 1394 transitions. Word has length 67 [2022-01-10 08:19:25,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:19:25,886 INFO L470 AbstractCegarLoop]: Abstraction has 998 states and 1394 transitions. [2022-01-10 08:19:25,886 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-10 08:19:25,886 INFO L276 IsEmpty]: Start isEmpty. Operand 998 states and 1394 transitions. [2022-01-10 08:19:25,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-01-10 08:19:25,887 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:19:25,887 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 08:19:25,898 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-01-10 08:19:26,094 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 08:19:26,094 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:19:26,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:19:26,095 INFO L85 PathProgramCache]: Analyzing trace with hash -2088486643, now seen corresponding path program 1 times [2022-01-10 08:19:26,095 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:19:26,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [18328559] [2022-01-10 08:19:26,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:19:26,096 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:19:26,096 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:19:26,097 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 08:19:26,098 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-01-10 08:19:26,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:19:26,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:19:26,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:19:26,278 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-10 08:19:26,278 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:19:26,278 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:19:26,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [18328559] [2022-01-10 08:19:26,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [18328559] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:19:26,278 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:19:26,279 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 08:19:26,279 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173635174] [2022-01-10 08:19:26,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:19:26,279 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:19:26,279 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:19:26,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:19:26,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:19:26,280 INFO L87 Difference]: Start difference. First operand 998 states and 1394 transitions. Second operand has 5 states, 5 states have (on average 10.8) internal successors, (54), 5 states have internal predecessors, (54), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-10 08:19:26,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:19:26,320 INFO L93 Difference]: Finished difference Result 1635 states and 2239 transitions. [2022-01-10 08:19:26,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 08:19:26,321 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 5 states have internal predecessors, (54), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 68 [2022-01-10 08:19:26,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:19:26,324 INFO L225 Difference]: With dead ends: 1635 [2022-01-10 08:19:26,324 INFO L226 Difference]: Without dead ends: 1141 [2022-01-10 08:19:26,325 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-01-10 08:19:26,325 INFO L933 BasicCegarLoop]: 646 mSDtfsCounter, 50 mSDsluCounter, 1957 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 2603 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 08:19:26,325 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 2603 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:19:26,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1141 states. [2022-01-10 08:19:26,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1141 to 1039. [2022-01-10 08:19:26,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1039 states, 930 states have (on average 1.3666666666666667) internal successors, (1271), 937 states have internal predecessors, (1271), 71 states have call successors, (71), 35 states have call predecessors, (71), 36 states have return successors, (93), 67 states have call predecessors, (93), 69 states have call successors, (93) [2022-01-10 08:19:26,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1039 states to 1039 states and 1435 transitions. [2022-01-10 08:19:26,349 INFO L78 Accepts]: Start accepts. Automaton has 1039 states and 1435 transitions. Word has length 68 [2022-01-10 08:19:26,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:19:26,350 INFO L470 AbstractCegarLoop]: Abstraction has 1039 states and 1435 transitions. [2022-01-10 08:19:26,350 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 5 states have internal predecessors, (54), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-10 08:19:26,350 INFO L276 IsEmpty]: Start isEmpty. Operand 1039 states and 1435 transitions. [2022-01-10 08:19:26,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-01-10 08:19:26,351 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:19:26,351 INFO L514 BasicCegarLoop]: trace histogram [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] [2022-01-10 08:19:26,357 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Ended with exit code 0 [2022-01-10 08:19:26,557 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 08:19:26,559 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:19:26,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:19:26,560 INFO L85 PathProgramCache]: Analyzing trace with hash 1177121355, now seen corresponding path program 1 times [2022-01-10 08:19:26,560 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:19:26,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1975300887] [2022-01-10 08:19:26,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:19:26,560 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:19:26,560 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:19:26,561 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 08:19:26,562 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-01-10 08:19:26,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:19:26,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:19:26,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:19:26,726 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-10 08:19:26,726 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:19:26,726 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:19:26,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1975300887] [2022-01-10 08:19:26,726 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1975300887] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:19:26,726 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:19:26,726 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 08:19:26,726 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801933400] [2022-01-10 08:19:26,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:19:26,727 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:19:26,727 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:19:26,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:19:26,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:19:26,727 INFO L87 Difference]: Start difference. First operand 1039 states and 1435 transitions. Second operand has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-10 08:19:26,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:19:26,768 INFO L93 Difference]: Finished difference Result 1532 states and 2081 transitions. [2022-01-10 08:19:26,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 08:19:26,768 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 68 [2022-01-10 08:19:26,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:19:26,771 INFO L225 Difference]: With dead ends: 1532 [2022-01-10 08:19:26,771 INFO L226 Difference]: Without dead ends: 950 [2022-01-10 08:19:26,772 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-01-10 08:19:26,773 INFO L933 BasicCegarLoop]: 644 mSDtfsCounter, 10 mSDsluCounter, 1931 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 2575 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 08:19:26,773 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 2575 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:19:26,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 950 states. [2022-01-10 08:19:26,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 950 to 930. [2022-01-10 08:19:26,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 930 states, 835 states have (on average 1.3724550898203594) internal successors, (1146), 844 states have internal predecessors, (1146), 61 states have call successors, (61), 29 states have call predecessors, (61), 32 states have return successors, (79), 57 states have call predecessors, (79), 59 states have call successors, (79) [2022-01-10 08:19:26,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 930 states to 930 states and 1286 transitions. [2022-01-10 08:19:26,814 INFO L78 Accepts]: Start accepts. Automaton has 930 states and 1286 transitions. Word has length 68 [2022-01-10 08:19:26,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:19:26,814 INFO L470 AbstractCegarLoop]: Abstraction has 930 states and 1286 transitions. [2022-01-10 08:19:26,814 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-10 08:19:26,814 INFO L276 IsEmpty]: Start isEmpty. Operand 930 states and 1286 transitions. [2022-01-10 08:19:26,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-01-10 08:19:26,815 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:19:26,815 INFO L514 BasicCegarLoop]: trace histogram [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] [2022-01-10 08:19:26,839 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-01-10 08:19:27,039 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 08:19:27,040 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:19:27,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:19:27,040 INFO L85 PathProgramCache]: Analyzing trace with hash -1068078965, now seen corresponding path program 1 times [2022-01-10 08:19:27,041 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:19:27,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1501694883] [2022-01-10 08:19:27,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:19:27,041 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:19:27,041 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:19:27,042 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 08:19:27,059 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-01-10 08:19:27,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:19:27,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:19:27,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:19:27,246 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 08:19:27,247 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 08:19:27,340 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 08:19:27,340 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:19:27,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1501694883] [2022-01-10 08:19:27,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1501694883] provided 1 perfect and 1 imperfect interpolant sequences [2022-01-10 08:19:27,341 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-10 08:19:27,341 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 4 [2022-01-10 08:19:27,341 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167668624] [2022-01-10 08:19:27,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:19:27,341 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 08:19:27,341 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:19:27,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 08:19:27,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 08:19:27,342 INFO L87 Difference]: Start difference. First operand 930 states and 1286 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 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 08:19:27,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:19:27,461 INFO L93 Difference]: Finished difference Result 985 states and 1353 transitions. [2022-01-10 08:19:27,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 08:19:27,462 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 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 08:19:27,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:19:27,465 INFO L225 Difference]: With dead ends: 985 [2022-01-10 08:19:27,465 INFO L226 Difference]: Without dead ends: 982 [2022-01-10 08:19:27,465 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 133 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 08:19:27,466 INFO L933 BasicCegarLoop]: 670 mSDtfsCounter, 1180 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1180 SdHoareTripleChecker+Valid, 737 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 08:19:27,466 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1180 Valid, 737 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 08:19:27,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 982 states. [2022-01-10 08:19:27,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 982 to 929. [2022-01-10 08:19:27,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 929 states, 835 states have (on average 1.370059880239521) internal successors, (1144), 843 states have internal predecessors, (1144), 60 states have call successors, (60), 29 states have call predecessors, (60), 32 states have return successors, (79), 57 states have call predecessors, (79), 59 states have call successors, (79) [2022-01-10 08:19:27,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 929 states to 929 states and 1283 transitions. [2022-01-10 08:19:27,487 INFO L78 Accepts]: Start accepts. Automaton has 929 states and 1283 transitions. Word has length 68 [2022-01-10 08:19:27,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:19:27,488 INFO L470 AbstractCegarLoop]: Abstraction has 929 states and 1283 transitions. [2022-01-10 08:19:27,488 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 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 08:19:27,488 INFO L276 IsEmpty]: Start isEmpty. Operand 929 states and 1283 transitions. [2022-01-10 08:19:27,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-01-10 08:19:27,489 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:19:27,489 INFO L514 BasicCegarLoop]: trace histogram [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] [2022-01-10 08:19:27,497 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Ended with exit code 0 [2022-01-10 08:19:27,697 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 08:19:27,698 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:19:27,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:19:27,698 INFO L85 PathProgramCache]: Analyzing trace with hash 1247970666, now seen corresponding path program 1 times [2022-01-10 08:19:27,698 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:19:27,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1533105660] [2022-01-10 08:19:27,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:19:27,699 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:19:27,699 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:19:27,700 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 08:19:27,701 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-01-10 08:19:27,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:19:27,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-10 08:19:27,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:19:28,070 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 08:19:28,071 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 08:19:28,191 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 08:19:28,191 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:19:28,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1533105660] [2022-01-10 08:19:28,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1533105660] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 08:19:28,191 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 08:19:28,191 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 7 [2022-01-10 08:19:28,191 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954467655] [2022-01-10 08:19:28,191 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 08:19:28,192 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-10 08:19:28,192 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:19:28,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-10 08:19:28,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-01-10 08:19:28,192 INFO L87 Difference]: Start difference. First operand 929 states and 1283 transitions. Second operand has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 6 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-01-10 08:19:28,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:19:28,416 INFO L93 Difference]: Finished difference Result 1752 states and 2325 transitions. [2022-01-10 08:19:28,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 08:19:28,416 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 6 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 69 [2022-01-10 08:19:28,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:19:28,422 INFO L225 Difference]: With dead ends: 1752 [2022-01-10 08:19:28,422 INFO L226 Difference]: Without dead ends: 1749 [2022-01-10 08:19:28,423 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 130 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-01-10 08:19:28,423 INFO L933 BasicCegarLoop]: 748 mSDtfsCounter, 1377 mSDsluCounter, 1494 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1377 SdHoareTripleChecker+Valid, 2242 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 08:19:28,423 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1377 Valid, 2242 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 08:19:28,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1749 states. [2022-01-10 08:19:28,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1749 to 1278. [2022-01-10 08:19:28,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1278 states, 1148 states have (on average 1.3379790940766552) internal successors, (1536), 1162 states have internal predecessors, (1536), 79 states have call successors, (79), 42 states have call predecessors, (79), 49 states have return successors, (110), 74 states have call predecessors, (110), 78 states have call successors, (110) [2022-01-10 08:19:28,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1278 states to 1278 states and 1725 transitions. [2022-01-10 08:19:28,501 INFO L78 Accepts]: Start accepts. Automaton has 1278 states and 1725 transitions. Word has length 69 [2022-01-10 08:19:28,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:19:28,501 INFO L470 AbstractCegarLoop]: Abstraction has 1278 states and 1725 transitions. [2022-01-10 08:19:28,501 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 6 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-01-10 08:19:28,502 INFO L276 IsEmpty]: Start isEmpty. Operand 1278 states and 1725 transitions. [2022-01-10 08:19:28,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-01-10 08:19:28,503 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:19:28,504 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 08:19:28,510 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Ended with exit code 0 [2022-01-10 08:19:28,710 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 08:19:28,710 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:19:28,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:19:28,711 INFO L85 PathProgramCache]: Analyzing trace with hash -813670106, now seen corresponding path program 2 times [2022-01-10 08:19:28,711 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:19:28,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1155276173] [2022-01-10 08:19:28,711 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 08:19:28,711 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:19:28,712 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:19:28,712 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 08:19:28,714 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-01-10 08:19:28,823 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 08:19:28,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 08:19:28,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 08:19:28,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:19:28,957 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 08:19:28,957 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:19:28,957 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:19:28,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1155276173] [2022-01-10 08:19:28,957 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1155276173] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:19:28,957 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:19:28,957 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 08:19:28,957 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075778098] [2022-01-10 08:19:28,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:19:28,958 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 08:19:28,958 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:19:28,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 08:19:28,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:19:28,958 INFO L87 Difference]: Start difference. First operand 1278 states and 1725 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 08:19:29,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:19:29,001 INFO L93 Difference]: Finished difference Result 1919 states and 2542 transitions. [2022-01-10 08:19:29,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 08:19:29,001 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 08:19:29,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:19:29,005 INFO L225 Difference]: With dead ends: 1919 [2022-01-10 08:19:29,005 INFO L226 Difference]: Without dead ends: 1168 [2022-01-10 08:19:29,006 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:19:29,007 INFO L933 BasicCegarLoop]: 677 mSDtfsCounter, 607 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 607 SdHoareTripleChecker+Valid, 751 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 08:19:29,007 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [607 Valid, 751 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:19:29,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1168 states. [2022-01-10 08:19:29,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1168 to 1156. [2022-01-10 08:19:29,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1156 states, 1039 states have (on average 1.34167468719923) internal successors, (1394), 1053 states have internal predecessors, (1394), 72 states have call successors, (72), 37 states have call predecessors, (72), 43 states have return successors, (99), 66 states have call predecessors, (99), 71 states have call successors, (99) [2022-01-10 08:19:29,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1156 states to 1156 states and 1565 transitions. [2022-01-10 08:19:29,036 INFO L78 Accepts]: Start accepts. Automaton has 1156 states and 1565 transitions. Word has length 88 [2022-01-10 08:19:29,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:19:29,037 INFO L470 AbstractCegarLoop]: Abstraction has 1156 states and 1565 transitions. [2022-01-10 08:19:29,037 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 08:19:29,037 INFO L276 IsEmpty]: Start isEmpty. Operand 1156 states and 1565 transitions. [2022-01-10 08:19:29,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-01-10 08:19:29,038 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:19:29,039 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 08:19:29,063 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-01-10 08:19:29,245 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 08:19:29,246 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:19:29,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:19:29,246 INFO L85 PathProgramCache]: Analyzing trace with hash -1245251330, now seen corresponding path program 1 times [2022-01-10 08:19:29,246 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:19:29,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [871414495] [2022-01-10 08:19:29,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:19:29,246 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:19:29,247 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:19:29,247 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 08:19:29,249 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-01-10 08:19:29,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:19:29,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:19:29,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:19:29,484 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 08:19:29,485 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:19:29,485 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:19:29,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [871414495] [2022-01-10 08:19:29,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [871414495] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:19:29,485 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:19:29,485 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 08:19:29,485 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651551915] [2022-01-10 08:19:29,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:19:29,485 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 08:19:29,485 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:19:29,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 08:19:29,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 08:19:29,486 INFO L87 Difference]: Start difference. First operand 1156 states and 1565 transitions. Second operand has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:19:29,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:19:29,670 INFO L93 Difference]: Finished difference Result 1986 states and 2612 transitions. [2022-01-10 08:19:29,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 08:19:29,671 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 103 [2022-01-10 08:19:29,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:19:29,675 INFO L225 Difference]: With dead ends: 1986 [2022-01-10 08:19:29,675 INFO L226 Difference]: Without dead ends: 1189 [2022-01-10 08:19:29,676 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 100 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 08:19:29,677 INFO L933 BasicCegarLoop]: 634 mSDtfsCounter, 849 mSDsluCounter, 373 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 874 SdHoareTripleChecker+Valid, 1007 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 08:19:29,677 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [874 Valid, 1007 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 08:19:29,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1189 states. [2022-01-10 08:19:29,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1189 to 1156. [2022-01-10 08:19:29,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1156 states, 1039 states have (on average 1.327237728585178) internal successors, (1379), 1053 states have internal predecessors, (1379), 72 states have call successors, (72), 37 states have call predecessors, (72), 43 states have return successors, (98), 66 states have call predecessors, (98), 71 states have call successors, (98) [2022-01-10 08:19:29,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1156 states to 1156 states and 1549 transitions. [2022-01-10 08:19:29,715 INFO L78 Accepts]: Start accepts. Automaton has 1156 states and 1549 transitions. Word has length 103 [2022-01-10 08:19:29,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:19:29,715 INFO L470 AbstractCegarLoop]: Abstraction has 1156 states and 1549 transitions. [2022-01-10 08:19:29,715 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:19:29,715 INFO L276 IsEmpty]: Start isEmpty. Operand 1156 states and 1549 transitions. [2022-01-10 08:19:29,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-01-10 08:19:29,717 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:19:29,717 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, 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] [2022-01-10 08:19:29,737 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-01-10 08:19:29,924 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 08:19:29,924 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:19:29,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:19:29,924 INFO L85 PathProgramCache]: Analyzing trace with hash -1391016163, now seen corresponding path program 1 times [2022-01-10 08:19:29,925 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:19:29,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [94906031] [2022-01-10 08:19:29,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:19:29,925 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:19:29,925 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:19:29,927 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 08:19:29,928 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-01-10 08:19:30,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:19:30,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 08:19:30,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:19:30,149 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-01-10 08:19:30,150 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:19:30,150 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:19:30,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [94906031] [2022-01-10 08:19:30,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [94906031] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:19:30,150 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:19:30,150 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 08:19:30,150 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457368756] [2022-01-10 08:19:30,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:19:30,150 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 08:19:30,150 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:19:30,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 08:19:30,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:19:30,151 INFO L87 Difference]: Start difference. First operand 1156 states and 1549 transitions. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-01-10 08:19:30,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:19:30,204 INFO L93 Difference]: Finished difference Result 1480 states and 1941 transitions. [2022-01-10 08:19:30,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 08:19:30,204 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 104 [2022-01-10 08:19:30,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:19:30,207 INFO L225 Difference]: With dead ends: 1480 [2022-01-10 08:19:30,207 INFO L226 Difference]: Without dead ends: 353 [2022-01-10 08:19:30,208 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:19:30,209 INFO L933 BasicCegarLoop]: 690 mSDtfsCounter, 55 mSDsluCounter, 621 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 1311 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 08:19:30,209 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 1311 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:19:30,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2022-01-10 08:19:30,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 353. [2022-01-10 08:19:30,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 353 states, 321 states have (on average 1.573208722741433) internal successors, (505), 322 states have internal predecessors, (505), 25 states have call successors, (25), 6 states have call predecessors, (25), 6 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2022-01-10 08:19:30,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 555 transitions. [2022-01-10 08:19:30,250 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 555 transitions. Word has length 104 [2022-01-10 08:19:30,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:19:30,250 INFO L470 AbstractCegarLoop]: Abstraction has 353 states and 555 transitions. [2022-01-10 08:19:30,250 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-01-10 08:19:30,250 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 555 transitions. [2022-01-10 08:19:30,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-01-10 08:19:30,253 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:19:30,253 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:19:30,261 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Ended with exit code 0 [2022-01-10 08:19:30,459 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 08:19:30,460 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:19:30,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:19:30,460 INFO L85 PathProgramCache]: Analyzing trace with hash -971993518, now seen corresponding path program 1 times [2022-01-10 08:19:30,461 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:19:30,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [399805553] [2022-01-10 08:19:30,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:19:30,461 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:19:30,461 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:19:30,462 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 08:19:30,462 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-01-10 08:19:30,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:19:30,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 469 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 08:19:30,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:19:30,811 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 08:19:30,812 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:19:30,812 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:19:30,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [399805553] [2022-01-10 08:19:30,812 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [399805553] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:19:30,812 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:19:30,812 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 08:19:30,812 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581701086] [2022-01-10 08:19:30,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:19:30,812 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 08:19:30,812 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:19:30,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 08:19:30,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:19:30,813 INFO L87 Difference]: Start difference. First operand 353 states and 555 transitions. Second operand has 3 states, 3 states have (on average 52.333333333333336) internal successors, (157), 3 states have internal predecessors, (157), 2 states have call successors, (5), 2 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 08:19:30,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:19:30,827 INFO L93 Difference]: Finished difference Result 696 states and 1095 transitions. [2022-01-10 08:19:30,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 08:19:30,828 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 52.333333333333336) internal successors, (157), 3 states have internal predecessors, (157), 2 states have call successors, (5), 2 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 167 [2022-01-10 08:19:30,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:19:30,829 INFO L225 Difference]: With dead ends: 696 [2022-01-10 08:19:30,829 INFO L226 Difference]: Without dead ends: 353 [2022-01-10 08:19:30,830 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:19:30,830 INFO L933 BasicCegarLoop]: 553 mSDtfsCounter, 543 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 543 SdHoareTripleChecker+Valid, 554 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 08:19:30,830 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [543 Valid, 554 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:19:30,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2022-01-10 08:19:30,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 353. [2022-01-10 08:19:30,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 353 states, 321 states have (on average 1.5700934579439252) internal successors, (504), 322 states have internal predecessors, (504), 25 states have call successors, (25), 6 states have call predecessors, (25), 6 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2022-01-10 08:19:30,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 554 transitions. [2022-01-10 08:19:30,838 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 554 transitions. Word has length 167 [2022-01-10 08:19:30,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:19:30,838 INFO L470 AbstractCegarLoop]: Abstraction has 353 states and 554 transitions. [2022-01-10 08:19:30,838 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.333333333333336) internal successors, (157), 3 states have internal predecessors, (157), 2 states have call successors, (5), 2 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 08:19:30,838 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 554 transitions. [2022-01-10 08:19:30,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-01-10 08:19:30,839 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:19:30,839 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:19:30,860 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-01-10 08:19:31,048 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 08:19:31,048 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:19:31,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:19:31,048 INFO L85 PathProgramCache]: Analyzing trace with hash -1952948332, now seen corresponding path program 1 times [2022-01-10 08:19:31,049 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:19:31,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1155462742] [2022-01-10 08:19:31,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:19:31,049 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:19:31,049 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:19:31,051 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 08:19:31,051 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-01-10 08:19:31,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:19:31,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 469 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 08:19:31,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:19:31,352 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 08:19:31,353 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:19:31,353 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:19:31,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1155462742] [2022-01-10 08:19:31,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1155462742] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:19:31,353 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:19:31,353 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 08:19:31,353 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291130280] [2022-01-10 08:19:31,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:19:31,353 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 08:19:31,354 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:19:31,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 08:19:31,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:19:31,354 INFO L87 Difference]: Start difference. First operand 353 states and 554 transitions. Second operand has 3 states, 3 states have (on average 52.333333333333336) internal successors, (157), 3 states have internal predecessors, (157), 2 states have call successors, (5), 2 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 08:19:31,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:19:31,378 INFO L93 Difference]: Finished difference Result 688 states and 1078 transitions. [2022-01-10 08:19:31,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 08:19:31,379 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 52.333333333333336) internal successors, (157), 3 states have internal predecessors, (157), 2 states have call successors, (5), 2 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 167 [2022-01-10 08:19:31,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:19:31,380 INFO L225 Difference]: With dead ends: 688 [2022-01-10 08:19:31,380 INFO L226 Difference]: Without dead ends: 353 [2022-01-10 08:19:31,381 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:19:31,381 INFO L933 BasicCegarLoop]: 552 mSDtfsCounter, 534 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 534 SdHoareTripleChecker+Valid, 553 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 08:19:31,382 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [534 Valid, 553 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:19:31,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2022-01-10 08:19:31,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 353. [2022-01-10 08:19:31,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 353 states, 321 states have (on average 1.5669781931464175) internal successors, (503), 322 states have internal predecessors, (503), 25 states have call successors, (25), 6 states have call predecessors, (25), 6 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2022-01-10 08:19:31,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 553 transitions. [2022-01-10 08:19:31,391 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 553 transitions. Word has length 167 [2022-01-10 08:19:31,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:19:31,391 INFO L470 AbstractCegarLoop]: Abstraction has 353 states and 553 transitions. [2022-01-10 08:19:31,391 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.333333333333336) internal successors, (157), 3 states have internal predecessors, (157), 2 states have call successors, (5), 2 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 08:19:31,391 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 553 transitions. [2022-01-10 08:19:31,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-01-10 08:19:31,392 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:19:31,392 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:19:31,416 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-01-10 08:19:31,601 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 08:19:31,601 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:19:31,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:19:31,602 INFO L85 PathProgramCache]: Analyzing trace with hash -1688300842, now seen corresponding path program 1 times [2022-01-10 08:19:31,602 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:19:31,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1968039133] [2022-01-10 08:19:31,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:19:31,602 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:19:31,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:19:31,616 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 08:19:31,617 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-01-10 08:19:31,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:19:31,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 469 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:19:31,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:19:31,960 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 08:19:31,961 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:19:31,961 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:19:31,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1968039133] [2022-01-10 08:19:31,961 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1968039133] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:19:31,961 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:19:31,961 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 08:19:31,961 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792887935] [2022-01-10 08:19:31,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:19:31,961 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:19:31,962 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:19:31,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:19:31,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:19:31,962 INFO L87 Difference]: Start difference. First operand 353 states and 553 transitions. Second operand has 5 states, 5 states have (on average 31.4) internal successors, (157), 3 states have internal predecessors, (157), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:19:32,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:19:32,607 INFO L93 Difference]: Finished difference Result 1063 states and 1685 transitions. [2022-01-10 08:19:32,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 08:19:32,607 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 31.4) internal successors, (157), 3 states have internal predecessors, (157), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 167 [2022-01-10 08:19:32,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:19:32,610 INFO L225 Difference]: With dead ends: 1063 [2022-01-10 08:19:32,610 INFO L226 Difference]: Without dead ends: 730 [2022-01-10 08:19:32,612 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-10 08:19:32,613 INFO L933 BasicCegarLoop]: 599 mSDtfsCounter, 1062 mSDsluCounter, 1097 mSDsCounter, 0 mSdLazyCounter, 477 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1081 SdHoareTripleChecker+Valid, 1696 SdHoareTripleChecker+Invalid, 532 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 477 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-10 08:19:32,613 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1081 Valid, 1696 Invalid, 532 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 477 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-10 08:19:32,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 730 states. [2022-01-10 08:19:32,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 730 to 703. [2022-01-10 08:19:32,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 703 states, 644 states have (on average 1.5807453416149069) internal successors, (1018), 646 states have internal predecessors, (1018), 45 states have call successors, (45), 12 states have call predecessors, (45), 13 states have return successors, (46), 45 states have call predecessors, (46), 45 states have call successors, (46) [2022-01-10 08:19:32,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 703 states to 703 states and 1109 transitions. [2022-01-10 08:19:32,635 INFO L78 Accepts]: Start accepts. Automaton has 703 states and 1109 transitions. Word has length 167 [2022-01-10 08:19:32,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:19:32,635 INFO L470 AbstractCegarLoop]: Abstraction has 703 states and 1109 transitions. [2022-01-10 08:19:32,635 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 31.4) internal successors, (157), 3 states have internal predecessors, (157), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:19:32,635 INFO L276 IsEmpty]: Start isEmpty. Operand 703 states and 1109 transitions. [2022-01-10 08:19:32,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-01-10 08:19:32,636 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:19:32,636 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:19:32,660 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-01-10 08:19:32,845 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 08:19:32,847 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:19:32,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:19:32,847 INFO L85 PathProgramCache]: Analyzing trace with hash -688714662, now seen corresponding path program 1 times [2022-01-10 08:19:32,847 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:19:32,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [899673105] [2022-01-10 08:19:32,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:19:32,848 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:19:32,848 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:19:32,850 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 08:19:32,851 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-01-10 08:19:32,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:19:32,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 467 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:19:32,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:19:33,179 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 08:19:33,179 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:19:33,179 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:19:33,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [899673105] [2022-01-10 08:19:33,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [899673105] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:19:33,179 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:19:33,179 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 08:19:33,179 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450526701] [2022-01-10 08:19:33,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:19:33,180 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:19:33,180 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:19:33,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:19:33,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:19:33,180 INFO L87 Difference]: Start difference. First operand 703 states and 1109 transitions. Second operand has 5 states, 5 states have (on average 31.4) internal successors, (157), 4 states have internal predecessors, (157), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:19:33,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:19:33,458 INFO L93 Difference]: Finished difference Result 1386 states and 2193 transitions. [2022-01-10 08:19:33,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 08:19:33,459 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 31.4) internal successors, (157), 4 states have internal predecessors, (157), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 167 [2022-01-10 08:19:33,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:19:33,461 INFO L225 Difference]: With dead ends: 1386 [2022-01-10 08:19:33,461 INFO L226 Difference]: Without dead ends: 703 [2022-01-10 08:19:33,462 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-10 08:19:33,463 INFO L933 BasicCegarLoop]: 522 mSDtfsCounter, 749 mSDsluCounter, 599 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 768 SdHoareTripleChecker+Valid, 1121 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 08:19:33,463 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [768 Valid, 1121 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 257 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 08:19:33,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 703 states. [2022-01-10 08:19:33,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 703 to 703. [2022-01-10 08:19:33,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 703 states, 644 states have (on average 1.5698757763975155) internal successors, (1011), 646 states have internal predecessors, (1011), 45 states have call successors, (45), 12 states have call predecessors, (45), 13 states have return successors, (46), 45 states have call predecessors, (46), 45 states have call successors, (46) [2022-01-10 08:19:33,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 703 states to 703 states and 1102 transitions. [2022-01-10 08:19:33,481 INFO L78 Accepts]: Start accepts. Automaton has 703 states and 1102 transitions. Word has length 167 [2022-01-10 08:19:33,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:19:33,481 INFO L470 AbstractCegarLoop]: Abstraction has 703 states and 1102 transitions. [2022-01-10 08:19:33,481 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 31.4) internal successors, (157), 4 states have internal predecessors, (157), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:19:33,481 INFO L276 IsEmpty]: Start isEmpty. Operand 703 states and 1102 transitions. [2022-01-10 08:19:33,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-01-10 08:19:33,482 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:19:33,482 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:19:33,490 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-01-10 08:19:33,690 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 08:19:33,691 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:19:33,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:19:33,691 INFO L85 PathProgramCache]: Analyzing trace with hash -102280618, now seen corresponding path program 1 times [2022-01-10 08:19:33,691 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:19:33,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [845697335] [2022-01-10 08:19:33,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:19:33,692 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:19:33,692 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:19:33,707 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 08:19:33,708 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-01-10 08:19:33,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:19:33,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:19:33,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:19:34,017 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 08:19:34,017 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:19:34,017 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:19:34,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [845697335] [2022-01-10 08:19:34,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [845697335] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:19:34,017 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:19:34,017 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 08:19:34,017 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175995592] [2022-01-10 08:19:34,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:19:34,018 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:19:34,018 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:19:34,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:19:34,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:19:34,018 INFO L87 Difference]: Start difference. First operand 703 states and 1102 transitions. Second operand has 5 states, 5 states have (on average 31.4) internal successors, (157), 4 states have internal predecessors, (157), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:19:34,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:19:34,302 INFO L93 Difference]: Finished difference Result 1386 states and 2179 transitions. [2022-01-10 08:19:34,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 08:19:34,303 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 31.4) internal successors, (157), 4 states have internal predecessors, (157), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 167 [2022-01-10 08:19:34,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:19:34,305 INFO L225 Difference]: With dead ends: 1386 [2022-01-10 08:19:34,305 INFO L226 Difference]: Without dead ends: 703 [2022-01-10 08:19:34,306 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-10 08:19:34,307 INFO L933 BasicCegarLoop]: 519 mSDtfsCounter, 742 mSDsluCounter, 595 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 761 SdHoareTripleChecker+Valid, 1114 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 08:19:34,307 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [761 Valid, 1114 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 257 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 08:19:34,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 703 states. [2022-01-10 08:19:34,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 703 to 703. [2022-01-10 08:19:34,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 703 states, 644 states have (on average 1.5590062111801242) internal successors, (1004), 646 states have internal predecessors, (1004), 45 states have call successors, (45), 12 states have call predecessors, (45), 13 states have return successors, (46), 45 states have call predecessors, (46), 45 states have call successors, (46) [2022-01-10 08:19:34,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 703 states to 703 states and 1095 transitions. [2022-01-10 08:19:34,325 INFO L78 Accepts]: Start accepts. Automaton has 703 states and 1095 transitions. Word has length 167 [2022-01-10 08:19:34,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:19:34,325 INFO L470 AbstractCegarLoop]: Abstraction has 703 states and 1095 transitions. [2022-01-10 08:19:34,325 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 31.4) internal successors, (157), 4 states have internal predecessors, (157), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:19:34,325 INFO L276 IsEmpty]: Start isEmpty. Operand 703 states and 1095 transitions. [2022-01-10 08:19:34,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-01-10 08:19:34,326 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:19:34,326 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:19:34,345 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-01-10 08:19:34,534 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 08:19:34,535 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:19:34,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:19:34,535 INFO L85 PathProgramCache]: Analyzing trace with hash -642710124, now seen corresponding path program 1 times [2022-01-10 08:19:34,535 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:19:34,535 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [864931528] [2022-01-10 08:19:34,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:19:34,536 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:19:34,536 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:19:34,537 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 08:19:34,538 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-01-10 08:19:34,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:19:34,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 464 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:19:34,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:19:34,871 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 08:19:34,872 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:19:34,872 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:19:34,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [864931528] [2022-01-10 08:19:34,872 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [864931528] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:19:34,872 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:19:34,872 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 08:19:34,872 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594903036] [2022-01-10 08:19:34,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:19:34,872 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:19:34,872 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:19:34,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:19:34,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:19:34,873 INFO L87 Difference]: Start difference. First operand 703 states and 1095 transitions. Second operand has 5 states, 5 states have (on average 31.4) internal successors, (157), 4 states have internal predecessors, (157), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:19:35,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:19:35,162 INFO L93 Difference]: Finished difference Result 1386 states and 2165 transitions. [2022-01-10 08:19:35,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 08:19:35,162 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 31.4) internal successors, (157), 4 states have internal predecessors, (157), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 167 [2022-01-10 08:19:35,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:19:35,164 INFO L225 Difference]: With dead ends: 1386 [2022-01-10 08:19:35,164 INFO L226 Difference]: Without dead ends: 703 [2022-01-10 08:19:35,165 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-10 08:19:35,166 INFO L933 BasicCegarLoop]: 516 mSDtfsCounter, 736 mSDsluCounter, 591 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 755 SdHoareTripleChecker+Valid, 1107 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 08:19:35,166 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [755 Valid, 1107 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 257 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 08:19:35,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 703 states. [2022-01-10 08:19:35,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 703 to 703. [2022-01-10 08:19:35,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 703 states, 644 states have (on average 1.5481366459627328) internal successors, (997), 646 states have internal predecessors, (997), 45 states have call successors, (45), 12 states have call predecessors, (45), 13 states have return successors, (46), 45 states have call predecessors, (46), 45 states have call successors, (46) [2022-01-10 08:19:35,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 703 states to 703 states and 1088 transitions. [2022-01-10 08:19:35,202 INFO L78 Accepts]: Start accepts. Automaton has 703 states and 1088 transitions. Word has length 167 [2022-01-10 08:19:35,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:19:35,203 INFO L470 AbstractCegarLoop]: Abstraction has 703 states and 1088 transitions. [2022-01-10 08:19:35,203 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 31.4) internal successors, (157), 4 states have internal predecessors, (157), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:19:35,203 INFO L276 IsEmpty]: Start isEmpty. Operand 703 states and 1088 transitions. [2022-01-10 08:19:35,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-01-10 08:19:35,204 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:19:35,204 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:19:35,214 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2022-01-10 08:19:35,412 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 08:19:35,412 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:19:35,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:19:35,413 INFO L85 PathProgramCache]: Analyzing trace with hash 1650909464, now seen corresponding path program 1 times [2022-01-10 08:19:35,413 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:19:35,413 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1726400995] [2022-01-10 08:19:35,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:19:35,413 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:19:35,413 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:19:35,414 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 08:19:35,426 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-01-10 08:19:35,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:19:35,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 462 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:19:35,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:19:35,736 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 08:19:35,736 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:19:35,736 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:19:35,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1726400995] [2022-01-10 08:19:35,736 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1726400995] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:19:35,736 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:19:35,736 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 08:19:35,736 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390730410] [2022-01-10 08:19:35,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:19:35,737 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:19:35,737 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:19:35,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:19:35,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:19:35,737 INFO L87 Difference]: Start difference. First operand 703 states and 1088 transitions. Second operand has 5 states, 5 states have (on average 31.4) internal successors, (157), 4 states have internal predecessors, (157), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:19:36,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:19:36,022 INFO L93 Difference]: Finished difference Result 1386 states and 2151 transitions. [2022-01-10 08:19:36,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 08:19:36,023 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 31.4) internal successors, (157), 4 states have internal predecessors, (157), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 167 [2022-01-10 08:19:36,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:19:36,025 INFO L225 Difference]: With dead ends: 1386 [2022-01-10 08:19:36,025 INFO L226 Difference]: Without dead ends: 703 [2022-01-10 08:19:36,026 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-10 08:19:36,026 INFO L933 BasicCegarLoop]: 513 mSDtfsCounter, 730 mSDsluCounter, 587 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 749 SdHoareTripleChecker+Valid, 1100 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 08:19:36,027 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [749 Valid, 1100 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 257 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 08:19:36,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 703 states. [2022-01-10 08:19:36,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 703 to 703. [2022-01-10 08:19:36,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 703 states, 644 states have (on average 1.5372670807453417) internal successors, (990), 646 states have internal predecessors, (990), 45 states have call successors, (45), 12 states have call predecessors, (45), 13 states have return successors, (46), 45 states have call predecessors, (46), 45 states have call successors, (46) [2022-01-10 08:19:36,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 703 states to 703 states and 1081 transitions. [2022-01-10 08:19:36,048 INFO L78 Accepts]: Start accepts. Automaton has 703 states and 1081 transitions. Word has length 167 [2022-01-10 08:19:36,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:19:36,048 INFO L470 AbstractCegarLoop]: Abstraction has 703 states and 1081 transitions. [2022-01-10 08:19:36,048 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 31.4) internal successors, (157), 4 states have internal predecessors, (157), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:19:36,048 INFO L276 IsEmpty]: Start isEmpty. Operand 703 states and 1081 transitions. [2022-01-10 08:19:36,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-01-10 08:19:36,049 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:19:36,049 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:19:36,069 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2022-01-10 08:19:36,258 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 08:19:36,258 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:19:36,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:19:36,259 INFO L85 PathProgramCache]: Analyzing trace with hash 1032160532, now seen corresponding path program 1 times [2022-01-10 08:19:36,259 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:19:36,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [841309210] [2022-01-10 08:19:36,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:19:36,259 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:19:36,259 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:19:36,260 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 08:19:36,264 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-01-10 08:19:36,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:19:36,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 460 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:19:36,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:19:36,628 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 08:19:36,628 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:19:36,628 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:19:36,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [841309210] [2022-01-10 08:19:36,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [841309210] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:19:36,629 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:19:36,629 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 08:19:36,629 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63983940] [2022-01-10 08:19:36,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:19:36,629 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:19:36,629 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:19:36,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:19:36,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:19:36,630 INFO L87 Difference]: Start difference. First operand 703 states and 1081 transitions. Second operand has 5 states, 5 states have (on average 31.4) internal successors, (157), 4 states have internal predecessors, (157), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:19:36,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:19:36,855 INFO L93 Difference]: Finished difference Result 1386 states and 2137 transitions. [2022-01-10 08:19:36,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 08:19:36,856 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 31.4) internal successors, (157), 4 states have internal predecessors, (157), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 167 [2022-01-10 08:19:36,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:19:36,858 INFO L225 Difference]: With dead ends: 1386 [2022-01-10 08:19:36,858 INFO L226 Difference]: Without dead ends: 703 [2022-01-10 08:19:36,859 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-10 08:19:36,859 INFO L933 BasicCegarLoop]: 510 mSDtfsCounter, 724 mSDsluCounter, 583 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 743 SdHoareTripleChecker+Valid, 1093 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 08:19:36,859 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [743 Valid, 1093 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 257 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 08:19:36,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 703 states. [2022-01-10 08:19:36,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 703 to 703. [2022-01-10 08:19:36,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 703 states, 644 states have (on average 1.5263975155279503) internal successors, (983), 646 states have internal predecessors, (983), 45 states have call successors, (45), 12 states have call predecessors, (45), 13 states have return successors, (46), 45 states have call predecessors, (46), 45 states have call successors, (46) [2022-01-10 08:19:36,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 703 states to 703 states and 1074 transitions. [2022-01-10 08:19:36,894 INFO L78 Accepts]: Start accepts. Automaton has 703 states and 1074 transitions. Word has length 167 [2022-01-10 08:19:36,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:19:36,894 INFO L470 AbstractCegarLoop]: Abstraction has 703 states and 1074 transitions. [2022-01-10 08:19:36,894 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 31.4) internal successors, (157), 4 states have internal predecessors, (157), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:19:36,894 INFO L276 IsEmpty]: Start isEmpty. Operand 703 states and 1074 transitions. [2022-01-10 08:19:36,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-01-10 08:19:36,895 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:19:36,895 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:19:36,906 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2022-01-10 08:19:37,106 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 08:19:37,106 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:19:37,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:19:37,107 INFO L85 PathProgramCache]: Analyzing trace with hash -96177768, now seen corresponding path program 1 times [2022-01-10 08:19:37,107 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:19:37,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1429117416] [2022-01-10 08:19:37,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:19:37,107 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:19:37,107 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:19:37,114 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 08:19:37,117 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-01-10 08:19:37,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:19:37,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:19:37,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:19:37,453 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 08:19:37,453 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:19:37,453 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:19:37,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1429117416] [2022-01-10 08:19:37,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1429117416] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:19:37,453 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:19:37,453 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 08:19:37,454 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822853507] [2022-01-10 08:19:37,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:19:37,454 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:19:37,454 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:19:37,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:19:37,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:19:37,454 INFO L87 Difference]: Start difference. First operand 703 states and 1074 transitions. Second operand has 5 states, 5 states have (on average 31.4) internal successors, (157), 4 states have internal predecessors, (157), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:19:37,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:19:37,728 INFO L93 Difference]: Finished difference Result 1386 states and 2123 transitions. [2022-01-10 08:19:37,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 08:19:37,728 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 31.4) internal successors, (157), 4 states have internal predecessors, (157), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 167 [2022-01-10 08:19:37,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:19:37,730 INFO L225 Difference]: With dead ends: 1386 [2022-01-10 08:19:37,730 INFO L226 Difference]: Without dead ends: 703 [2022-01-10 08:19:37,731 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-10 08:19:37,732 INFO L933 BasicCegarLoop]: 507 mSDtfsCounter, 718 mSDsluCounter, 579 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 737 SdHoareTripleChecker+Valid, 1086 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 08:19:37,732 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [737 Valid, 1086 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 257 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 08:19:37,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 703 states. [2022-01-10 08:19:37,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 703 to 703. [2022-01-10 08:19:37,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 703 states, 644 states have (on average 1.515527950310559) internal successors, (976), 646 states have internal predecessors, (976), 45 states have call successors, (45), 12 states have call predecessors, (45), 13 states have return successors, (46), 45 states have call predecessors, (46), 45 states have call successors, (46) [2022-01-10 08:19:37,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 703 states to 703 states and 1067 transitions. [2022-01-10 08:19:37,756 INFO L78 Accepts]: Start accepts. Automaton has 703 states and 1067 transitions. Word has length 167 [2022-01-10 08:19:37,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:19:37,756 INFO L470 AbstractCegarLoop]: Abstraction has 703 states and 1067 transitions. [2022-01-10 08:19:37,756 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 31.4) internal successors, (157), 4 states have internal predecessors, (157), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:19:37,757 INFO L276 IsEmpty]: Start isEmpty. Operand 703 states and 1067 transitions. [2022-01-10 08:19:37,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-01-10 08:19:37,757 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:19:37,757 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:19:37,767 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2022-01-10 08:19:37,965 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 08:19:37,966 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:19:37,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:19:37,966 INFO L85 PathProgramCache]: Analyzing trace with hash 1668539540, now seen corresponding path program 1 times [2022-01-10 08:19:37,966 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:19:37,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1135844558] [2022-01-10 08:19:37,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:19:37,967 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:19:37,967 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:19:37,968 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 08:19:37,968 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-01-10 08:19:38,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:19:38,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 456 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:19:38,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:19:38,297 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 08:19:38,297 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:19:38,297 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:19:38,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1135844558] [2022-01-10 08:19:38,297 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1135844558] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:19:38,297 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:19:38,297 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 08:19:38,298 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030009243] [2022-01-10 08:19:38,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:19:38,298 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:19:38,298 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:19:38,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:19:38,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:19:38,298 INFO L87 Difference]: Start difference. First operand 703 states and 1067 transitions. Second operand has 5 states, 5 states have (on average 31.4) internal successors, (157), 4 states have internal predecessors, (157), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:19:38,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:19:38,583 INFO L93 Difference]: Finished difference Result 1386 states and 2109 transitions. [2022-01-10 08:19:38,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 08:19:38,584 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 31.4) internal successors, (157), 4 states have internal predecessors, (157), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 167 [2022-01-10 08:19:38,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:19:38,586 INFO L225 Difference]: With dead ends: 1386 [2022-01-10 08:19:38,586 INFO L226 Difference]: Without dead ends: 703 [2022-01-10 08:19:38,587 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-10 08:19:38,587 INFO L933 BasicCegarLoop]: 504 mSDtfsCounter, 712 mSDsluCounter, 575 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 731 SdHoareTripleChecker+Valid, 1079 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 08:19:38,587 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [731 Valid, 1079 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 257 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 08:19:38,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 703 states. [2022-01-10 08:19:38,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 703 to 703. [2022-01-10 08:19:38,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 703 states, 644 states have (on average 1.5046583850931676) internal successors, (969), 646 states have internal predecessors, (969), 45 states have call successors, (45), 12 states have call predecessors, (45), 13 states have return successors, (46), 45 states have call predecessors, (46), 45 states have call successors, (46) [2022-01-10 08:19:38,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 703 states to 703 states and 1060 transitions. [2022-01-10 08:19:38,608 INFO L78 Accepts]: Start accepts. Automaton has 703 states and 1060 transitions. Word has length 167 [2022-01-10 08:19:38,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:19:38,608 INFO L470 AbstractCegarLoop]: Abstraction has 703 states and 1060 transitions. [2022-01-10 08:19:38,608 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 31.4) internal successors, (157), 4 states have internal predecessors, (157), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:19:38,608 INFO L276 IsEmpty]: Start isEmpty. Operand 703 states and 1060 transitions. [2022-01-10 08:19:38,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-01-10 08:19:38,609 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:19:38,609 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:19:38,631 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2022-01-10 08:19:38,817 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 08:19:38,818 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:19:38,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:19:38,818 INFO L85 PathProgramCache]: Analyzing trace with hash 894181912, now seen corresponding path program 1 times [2022-01-10 08:19:38,819 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:19:38,819 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1066861640] [2022-01-10 08:19:38,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:19:38,819 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:19:38,819 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:19:38,820 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 08:19:38,821 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-01-10 08:19:38,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:19:38,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 454 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:19:38,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:19:39,230 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 08:19:39,230 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:19:39,230 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:19:39,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1066861640] [2022-01-10 08:19:39,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1066861640] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:19:39,230 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:19:39,230 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 08:19:39,230 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779771143] [2022-01-10 08:19:39,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:19:39,231 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:19:39,231 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:19:39,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:19:39,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:19:39,231 INFO L87 Difference]: Start difference. First operand 703 states and 1060 transitions. Second operand has 5 states, 5 states have (on average 31.4) internal successors, (157), 4 states have internal predecessors, (157), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:19:39,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:19:39,505 INFO L93 Difference]: Finished difference Result 1386 states and 2095 transitions. [2022-01-10 08:19:39,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 08:19:39,506 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 31.4) internal successors, (157), 4 states have internal predecessors, (157), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 167 [2022-01-10 08:19:39,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:19:39,523 INFO L225 Difference]: With dead ends: 1386 [2022-01-10 08:19:39,524 INFO L226 Difference]: Without dead ends: 703 [2022-01-10 08:19:39,527 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-10 08:19:39,530 INFO L933 BasicCegarLoop]: 501 mSDtfsCounter, 706 mSDsluCounter, 571 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 725 SdHoareTripleChecker+Valid, 1072 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 08:19:39,530 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [725 Valid, 1072 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 257 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 08:19:39,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 703 states. [2022-01-10 08:19:39,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 703 to 703. [2022-01-10 08:19:39,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 703 states, 644 states have (on average 1.4937888198757765) internal successors, (962), 646 states have internal predecessors, (962), 45 states have call successors, (45), 12 states have call predecessors, (45), 13 states have return successors, (46), 45 states have call predecessors, (46), 45 states have call successors, (46) [2022-01-10 08:19:39,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 703 states to 703 states and 1053 transitions. [2022-01-10 08:19:39,584 INFO L78 Accepts]: Start accepts. Automaton has 703 states and 1053 transitions. Word has length 167 [2022-01-10 08:19:39,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:19:39,584 INFO L470 AbstractCegarLoop]: Abstraction has 703 states and 1053 transitions. [2022-01-10 08:19:39,584 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 31.4) internal successors, (157), 4 states have internal predecessors, (157), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:19:39,584 INFO L276 IsEmpty]: Start isEmpty. Operand 703 states and 1053 transitions. [2022-01-10 08:19:39,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-01-10 08:19:39,599 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:19:39,599 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:19:39,610 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2022-01-10 08:19:39,808 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 08:19:39,809 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:19:39,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:19:39,809 INFO L85 PathProgramCache]: Analyzing trace with hash -931912684, now seen corresponding path program 1 times [2022-01-10 08:19:39,809 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:19:39,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1014538158] [2022-01-10 08:19:39,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:19:39,809 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:19:39,810 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:19:39,810 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 08:19:39,812 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-01-10 08:19:39,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:19:39,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 452 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:19:39,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:19:40,138 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 08:19:40,139 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:19:40,139 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:19:40,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1014538158] [2022-01-10 08:19:40,139 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1014538158] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:19:40,139 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:19:40,139 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 08:19:40,139 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908855622] [2022-01-10 08:19:40,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:19:40,139 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:19:40,139 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:19:40,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:19:40,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:19:40,140 INFO L87 Difference]: Start difference. First operand 703 states and 1053 transitions. Second operand has 5 states, 5 states have (on average 31.4) internal successors, (157), 4 states have internal predecessors, (157), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:19:40,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:19:40,470 INFO L93 Difference]: Finished difference Result 1386 states and 2081 transitions. [2022-01-10 08:19:40,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 08:19:40,483 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 31.4) internal successors, (157), 4 states have internal predecessors, (157), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 167 [2022-01-10 08:19:40,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:19:40,485 INFO L225 Difference]: With dead ends: 1386 [2022-01-10 08:19:40,485 INFO L226 Difference]: Without dead ends: 703 [2022-01-10 08:19:40,487 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-10 08:19:40,487 INFO L933 BasicCegarLoop]: 498 mSDtfsCounter, 699 mSDsluCounter, 567 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 718 SdHoareTripleChecker+Valid, 1065 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 08:19:40,487 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [718 Valid, 1065 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 257 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 08:19:40,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 703 states. [2022-01-10 08:19:40,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 703 to 703. [2022-01-10 08:19:40,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 703 states, 644 states have (on average 1.4829192546583851) internal successors, (955), 646 states have internal predecessors, (955), 45 states have call successors, (45), 12 states have call predecessors, (45), 13 states have return successors, (46), 45 states have call predecessors, (46), 45 states have call successors, (46) [2022-01-10 08:19:40,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 703 states to 703 states and 1046 transitions. [2022-01-10 08:19:40,522 INFO L78 Accepts]: Start accepts. Automaton has 703 states and 1046 transitions. Word has length 167 [2022-01-10 08:19:40,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:19:40,522 INFO L470 AbstractCegarLoop]: Abstraction has 703 states and 1046 transitions. [2022-01-10 08:19:40,522 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 31.4) internal successors, (157), 4 states have internal predecessors, (157), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:19:40,522 INFO L276 IsEmpty]: Start isEmpty. Operand 703 states and 1046 transitions. [2022-01-10 08:19:40,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-01-10 08:19:40,522 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:19:40,523 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:19:40,545 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2022-01-10 08:19:40,730 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 08:19:40,730 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:19:40,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:19:40,731 INFO L85 PathProgramCache]: Analyzing trace with hash 1745614162, now seen corresponding path program 1 times [2022-01-10 08:19:40,731 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:19:40,731 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1148083882] [2022-01-10 08:19:40,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:19:40,731 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:19:40,731 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:19:40,732 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 08:19:40,734 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-01-10 08:19:40,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:19:40,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:19:40,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:19:41,082 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 08:19:41,082 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:19:41,082 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:19:41,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1148083882] [2022-01-10 08:19:41,082 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1148083882] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:19:41,083 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:19:41,083 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 08:19:41,083 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512063116] [2022-01-10 08:19:41,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:19:41,083 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:19:41,083 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:19:41,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:19:41,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:19:41,084 INFO L87 Difference]: Start difference. First operand 703 states and 1046 transitions. Second operand has 5 states, 5 states have (on average 31.4) internal successors, (157), 4 states have internal predecessors, (157), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:19:41,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:19:41,489 INFO L93 Difference]: Finished difference Result 1564 states and 2343 transitions. [2022-01-10 08:19:41,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 08:19:41,499 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 31.4) internal successors, (157), 4 states have internal predecessors, (157), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 167 [2022-01-10 08:19:41,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:19:41,502 INFO L225 Difference]: With dead ends: 1564 [2022-01-10 08:19:41,502 INFO L226 Difference]: Without dead ends: 881 [2022-01-10 08:19:41,503 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-10 08:19:41,504 INFO L933 BasicCegarLoop]: 495 mSDtfsCounter, 809 mSDsluCounter, 562 mSDsCounter, 0 mSdLazyCounter, 389 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 828 SdHoareTripleChecker+Valid, 1057 SdHoareTripleChecker+Invalid, 426 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-10 08:19:41,507 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [828 Valid, 1057 Invalid, 426 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 389 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-10 08:19:41,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 881 states. [2022-01-10 08:19:41,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 881 to 881. [2022-01-10 08:19:41,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 881 states, 816 states have (on average 1.4583333333333333) internal successors, (1190), 818 states have internal predecessors, (1190), 47 states have call successors, (47), 16 states have call predecessors, (47), 17 states have return successors, (48), 47 states have call predecessors, (48), 47 states have call successors, (48) [2022-01-10 08:19:41,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 881 states to 881 states and 1285 transitions. [2022-01-10 08:19:41,546 INFO L78 Accepts]: Start accepts. Automaton has 881 states and 1285 transitions. Word has length 167 [2022-01-10 08:19:41,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:19:41,546 INFO L470 AbstractCegarLoop]: Abstraction has 881 states and 1285 transitions. [2022-01-10 08:19:41,546 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 31.4) internal successors, (157), 4 states have internal predecessors, (157), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:19:41,547 INFO L276 IsEmpty]: Start isEmpty. Operand 881 states and 1285 transitions. [2022-01-10 08:19:41,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-01-10 08:19:41,547 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:19:41,548 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:19:41,555 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2022-01-10 08:19:41,755 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 08:19:41,755 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:19:41,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:19:41,755 INFO L85 PathProgramCache]: Analyzing trace with hash -2066774633, now seen corresponding path program 1 times [2022-01-10 08:19:41,756 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:19:41,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [618843844] [2022-01-10 08:19:41,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:19:41,757 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:19:41,757 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:19:41,758 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 08:19:41,759 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-01-10 08:19:41,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:19:41,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:19:41,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:19:42,078 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 08:19:42,078 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:19:42,078 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:19:42,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [618843844] [2022-01-10 08:19:42,078 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [618843844] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:19:42,079 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:19:42,079 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 08:19:42,079 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396490237] [2022-01-10 08:19:42,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:19:42,079 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:19:42,079 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:19:42,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:19:42,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:19:42,080 INFO L87 Difference]: Start difference. First operand 881 states and 1285 transitions. Second operand has 5 states, 5 states have (on average 31.4) internal successors, (157), 4 states have internal predecessors, (157), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:19:42,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:19:42,487 INFO L93 Difference]: Finished difference Result 1920 states and 2821 transitions. [2022-01-10 08:19:42,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 08:19:42,487 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 31.4) internal successors, (157), 4 states have internal predecessors, (157), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 167 [2022-01-10 08:19:42,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:19:42,490 INFO L225 Difference]: With dead ends: 1920 [2022-01-10 08:19:42,490 INFO L226 Difference]: Without dead ends: 1059 [2022-01-10 08:19:42,492 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-10 08:19:42,492 INFO L933 BasicCegarLoop]: 493 mSDtfsCounter, 802 mSDsluCounter, 558 mSDsCounter, 0 mSdLazyCounter, 389 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 821 SdHoareTripleChecker+Valid, 1051 SdHoareTripleChecker+Invalid, 425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-10 08:19:42,493 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [821 Valid, 1051 Invalid, 425 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 389 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-10 08:19:42,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1059 states. [2022-01-10 08:19:42,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1059 to 1059. [2022-01-10 08:19:42,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1059 states, 988 states have (on average 1.438259109311741) internal successors, (1421), 990 states have internal predecessors, (1421), 49 states have call successors, (49), 20 states have call predecessors, (49), 21 states have return successors, (50), 49 states have call predecessors, (50), 49 states have call successors, (50) [2022-01-10 08:19:42,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1059 states to 1059 states and 1520 transitions. [2022-01-10 08:19:42,530 INFO L78 Accepts]: Start accepts. Automaton has 1059 states and 1520 transitions. Word has length 167 [2022-01-10 08:19:42,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:19:42,530 INFO L470 AbstractCegarLoop]: Abstraction has 1059 states and 1520 transitions. [2022-01-10 08:19:42,530 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 31.4) internal successors, (157), 4 states have internal predecessors, (157), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:19:42,530 INFO L276 IsEmpty]: Start isEmpty. Operand 1059 states and 1520 transitions. [2022-01-10 08:19:42,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-01-10 08:19:42,531 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:19:42,531 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:19:42,539 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2022-01-10 08:19:42,738 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 08:19:42,739 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:19:42,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:19:42,739 INFO L85 PathProgramCache]: Analyzing trace with hash -1755322989, now seen corresponding path program 1 times [2022-01-10 08:19:42,739 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:19:42,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [356355680] [2022-01-10 08:19:42,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:19:42,739 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:19:42,740 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:19:42,741 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 08:19:42,742 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2022-01-10 08:19:42,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:19:42,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 446 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:19:42,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:19:43,067 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 08:19:43,068 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:19:43,068 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:19:43,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [356355680] [2022-01-10 08:19:43,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [356355680] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:19:43,068 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:19:43,068 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 08:19:43,068 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172320434] [2022-01-10 08:19:43,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:19:43,068 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:19:43,069 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:19:43,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:19:43,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:19:43,069 INFO L87 Difference]: Start difference. First operand 1059 states and 1520 transitions. Second operand has 5 states, 5 states have (on average 31.4) internal successors, (157), 4 states have internal predecessors, (157), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:19:43,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:19:43,476 INFO L93 Difference]: Finished difference Result 2276 states and 3291 transitions. [2022-01-10 08:19:43,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 08:19:43,476 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 31.4) internal successors, (157), 4 states have internal predecessors, (157), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 167 [2022-01-10 08:19:43,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:19:43,479 INFO L225 Difference]: With dead ends: 2276 [2022-01-10 08:19:43,479 INFO L226 Difference]: Without dead ends: 1237 [2022-01-10 08:19:43,481 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-10 08:19:43,481 INFO L933 BasicCegarLoop]: 488 mSDtfsCounter, 796 mSDsluCounter, 554 mSDsCounter, 0 mSdLazyCounter, 386 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 815 SdHoareTripleChecker+Valid, 1042 SdHoareTripleChecker+Invalid, 423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 386 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 08:19:43,481 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [815 Valid, 1042 Invalid, 423 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 386 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 08:19:43,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1237 states. [2022-01-10 08:19:43,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1237 to 1237. [2022-01-10 08:19:43,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1237 states, 1160 states have (on average 1.4206896551724137) internal successors, (1648), 1162 states have internal predecessors, (1648), 51 states have call successors, (51), 24 states have call predecessors, (51), 25 states have return successors, (52), 51 states have call predecessors, (52), 51 states have call successors, (52) [2022-01-10 08:19:43,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1237 states to 1237 states and 1751 transitions. [2022-01-10 08:19:43,528 INFO L78 Accepts]: Start accepts. Automaton has 1237 states and 1751 transitions. Word has length 167 [2022-01-10 08:19:43,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:19:43,529 INFO L470 AbstractCegarLoop]: Abstraction has 1237 states and 1751 transitions. [2022-01-10 08:19:43,529 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 31.4) internal successors, (157), 4 states have internal predecessors, (157), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:19:43,529 INFO L276 IsEmpty]: Start isEmpty. Operand 1237 states and 1751 transitions. [2022-01-10 08:19:43,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-01-10 08:19:43,529 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:19:43,529 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:19:43,537 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2022-01-10 08:19:43,737 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 08:19:43,737 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:19:43,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:19:43,738 INFO L85 PathProgramCache]: Analyzing trace with hash -626532264, now seen corresponding path program 1 times [2022-01-10 08:19:43,738 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:19:43,738 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [926328955] [2022-01-10 08:19:43,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:19:43,738 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:19:43,738 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:19:43,739 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 08:19:43,741 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2022-01-10 08:19:43,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:19:43,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 443 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:19:43,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:19:44,059 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 08:19:44,060 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:19:44,060 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:19:44,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [926328955] [2022-01-10 08:19:44,060 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [926328955] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:19:44,060 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:19:44,060 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 08:19:44,060 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801264405] [2022-01-10 08:19:44,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:19:44,060 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:19:44,060 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:19:44,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:19:44,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:19:44,061 INFO L87 Difference]: Start difference. First operand 1237 states and 1751 transitions. Second operand has 5 states, 5 states have (on average 31.4) internal successors, (157), 4 states have internal predecessors, (157), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:19:44,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:19:44,493 INFO L93 Difference]: Finished difference Result 2632 states and 3753 transitions. [2022-01-10 08:19:44,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 08:19:44,494 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 31.4) internal successors, (157), 4 states have internal predecessors, (157), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 167 [2022-01-10 08:19:44,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:19:44,498 INFO L225 Difference]: With dead ends: 2632 [2022-01-10 08:19:44,498 INFO L226 Difference]: Without dead ends: 1415 [2022-01-10 08:19:44,501 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-10 08:19:44,501 INFO L933 BasicCegarLoop]: 485 mSDtfsCounter, 789 mSDsluCounter, 550 mSDsCounter, 0 mSdLazyCounter, 385 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 808 SdHoareTripleChecker+Valid, 1035 SdHoareTripleChecker+Invalid, 422 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 385 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 08:19:44,502 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [808 Valid, 1035 Invalid, 422 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 385 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 08:19:44,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1415 states. [2022-01-10 08:19:44,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1415 to 1415. [2022-01-10 08:19:44,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1415 states, 1332 states have (on average 1.4046546546546546) internal successors, (1871), 1334 states have internal predecessors, (1871), 53 states have call successors, (53), 28 states have call predecessors, (53), 29 states have return successors, (54), 53 states have call predecessors, (54), 53 states have call successors, (54) [2022-01-10 08:19:44,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1415 states to 1415 states and 1978 transitions. [2022-01-10 08:19:44,566 INFO L78 Accepts]: Start accepts. Automaton has 1415 states and 1978 transitions. Word has length 167 [2022-01-10 08:19:44,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:19:44,566 INFO L470 AbstractCegarLoop]: Abstraction has 1415 states and 1978 transitions. [2022-01-10 08:19:44,566 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 31.4) internal successors, (157), 4 states have internal predecessors, (157), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:19:44,566 INFO L276 IsEmpty]: Start isEmpty. Operand 1415 states and 1978 transitions. [2022-01-10 08:19:44,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-01-10 08:19:44,568 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:19:44,568 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:19:44,587 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2022-01-10 08:19:44,776 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 08:19:44,776 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:19:44,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:19:44,777 INFO L85 PathProgramCache]: Analyzing trace with hash -460845228, now seen corresponding path program 1 times [2022-01-10 08:19:44,777 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:19:44,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [698701796] [2022-01-10 08:19:44,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:19:44,777 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:19:44,777 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:19:44,778 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 08:19:44,779 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2022-01-10 08:19:44,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:19:44,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 441 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:19:44,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:19:45,157 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 08:19:45,157 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:19:45,157 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:19:45,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [698701796] [2022-01-10 08:19:45,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [698701796] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:19:45,157 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:19:45,157 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 08:19:45,158 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726079671] [2022-01-10 08:19:45,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:19:45,158 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:19:45,158 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:19:45,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:19:45,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:19:45,158 INFO L87 Difference]: Start difference. First operand 1415 states and 1978 transitions. Second operand has 5 states, 5 states have (on average 31.4) internal successors, (157), 4 states have internal predecessors, (157), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:19:45,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:19:45,662 INFO L93 Difference]: Finished difference Result 2988 states and 4207 transitions. [2022-01-10 08:19:45,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 08:19:45,662 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 31.4) internal successors, (157), 4 states have internal predecessors, (157), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 167 [2022-01-10 08:19:45,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:19:45,669 INFO L225 Difference]: With dead ends: 2988 [2022-01-10 08:19:45,669 INFO L226 Difference]: Without dead ends: 1593 [2022-01-10 08:19:45,671 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-10 08:19:45,672 INFO L933 BasicCegarLoop]: 482 mSDtfsCounter, 782 mSDsluCounter, 546 mSDsCounter, 0 mSdLazyCounter, 384 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 801 SdHoareTripleChecker+Valid, 1028 SdHoareTripleChecker+Invalid, 421 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 384 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-10 08:19:45,672 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [801 Valid, 1028 Invalid, 421 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 384 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-10 08:19:45,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1593 states. [2022-01-10 08:19:45,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1593 to 1593. [2022-01-10 08:19:45,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1593 states, 1504 states have (on average 1.389627659574468) internal successors, (2090), 1506 states have internal predecessors, (2090), 55 states have call successors, (55), 32 states have call predecessors, (55), 33 states have return successors, (56), 55 states have call predecessors, (56), 55 states have call successors, (56) [2022-01-10 08:19:45,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1593 states to 1593 states and 2201 transitions. [2022-01-10 08:19:45,738 INFO L78 Accepts]: Start accepts. Automaton has 1593 states and 2201 transitions. Word has length 167 [2022-01-10 08:19:45,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:19:45,738 INFO L470 AbstractCegarLoop]: Abstraction has 1593 states and 2201 transitions. [2022-01-10 08:19:45,738 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 31.4) internal successors, (157), 4 states have internal predecessors, (157), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:19:45,738 INFO L276 IsEmpty]: Start isEmpty. Operand 1593 states and 2201 transitions. [2022-01-10 08:19:45,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-01-10 08:19:45,738 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:19:45,739 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:19:45,747 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2022-01-10 08:19:45,949 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 08:19:45,949 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:19:45,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:19:45,950 INFO L85 PathProgramCache]: Analyzing trace with hash 1631515801, now seen corresponding path program 1 times [2022-01-10 08:19:45,950 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:19:45,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [562375240] [2022-01-10 08:19:45,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:19:45,950 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:19:45,951 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:19:45,952 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 08:19:45,953 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2022-01-10 08:19:46,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:19:46,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 438 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:19:46,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:19:46,201 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 08:19:46,201 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:19:46,201 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:19:46,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [562375240] [2022-01-10 08:19:46,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [562375240] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:19:46,201 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:19:46,201 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 08:19:46,201 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349923529] [2022-01-10 08:19:46,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:19:46,201 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:19:46,202 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:19:46,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:19:46,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:19:46,202 INFO L87 Difference]: Start difference. First operand 1593 states and 2201 transitions. Second operand has 5 states, 5 states have (on average 31.4) internal successors, (157), 4 states have internal predecessors, (157), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:19:46,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:19:46,722 INFO L93 Difference]: Finished difference Result 3344 states and 4653 transitions. [2022-01-10 08:19:46,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 08:19:46,723 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 31.4) internal successors, (157), 4 states have internal predecessors, (157), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 167 [2022-01-10 08:19:46,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:19:46,727 INFO L225 Difference]: With dead ends: 3344 [2022-01-10 08:19:46,727 INFO L226 Difference]: Without dead ends: 1771 [2022-01-10 08:19:46,729 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-10 08:19:46,729 INFO L933 BasicCegarLoop]: 479 mSDtfsCounter, 775 mSDsluCounter, 542 mSDsCounter, 0 mSdLazyCounter, 383 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 794 SdHoareTripleChecker+Valid, 1021 SdHoareTripleChecker+Invalid, 420 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 383 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-10 08:19:46,729 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [794 Valid, 1021 Invalid, 420 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 383 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-10 08:19:46,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1771 states. [2022-01-10 08:19:46,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1771 to 1771. [2022-01-10 08:19:46,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1771 states, 1676 states have (on average 1.3752983293556087) internal successors, (2305), 1678 states have internal predecessors, (2305), 57 states have call successors, (57), 36 states have call predecessors, (57), 37 states have return successors, (58), 57 states have call predecessors, (58), 57 states have call successors, (58) [2022-01-10 08:19:46,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1771 states to 1771 states and 2420 transitions. [2022-01-10 08:19:46,814 INFO L78 Accepts]: Start accepts. Automaton has 1771 states and 2420 transitions. Word has length 167 [2022-01-10 08:19:46,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:19:46,814 INFO L470 AbstractCegarLoop]: Abstraction has 1771 states and 2420 transitions. [2022-01-10 08:19:46,814 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 31.4) internal successors, (157), 4 states have internal predecessors, (157), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:19:46,814 INFO L276 IsEmpty]: Start isEmpty. Operand 1771 states and 2420 transitions. [2022-01-10 08:19:46,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-01-10 08:19:46,815 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:19:46,815 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:19:46,840 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2022-01-10 08:19:47,024 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 08:19:47,024 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:19:47,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:19:47,024 INFO L85 PathProgramCache]: Analyzing trace with hash -376456426, now seen corresponding path program 1 times [2022-01-10 08:19:47,024 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:19:47,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1233089056] [2022-01-10 08:19:47,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:19:47,025 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:19:47,025 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:19:47,026 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 08:19:47,028 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2022-01-10 08:19:47,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:19:47,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 435 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:19:47,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:19:47,331 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 08:19:47,331 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:19:47,331 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:19:47,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1233089056] [2022-01-10 08:19:47,331 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1233089056] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:19:47,331 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:19:47,331 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 08:19:47,332 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190903680] [2022-01-10 08:19:47,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:19:47,332 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:19:47,332 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:19:47,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:19:47,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:19:47,332 INFO L87 Difference]: Start difference. First operand 1771 states and 2420 transitions. Second operand has 5 states, 5 states have (on average 31.4) internal successors, (157), 4 states have internal predecessors, (157), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:19:47,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:19:47,794 INFO L93 Difference]: Finished difference Result 3700 states and 5091 transitions. [2022-01-10 08:19:47,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 08:19:47,795 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 31.4) internal successors, (157), 4 states have internal predecessors, (157), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 167 [2022-01-10 08:19:47,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:19:47,803 INFO L225 Difference]: With dead ends: 3700 [2022-01-10 08:19:47,803 INFO L226 Difference]: Without dead ends: 1949 [2022-01-10 08:19:47,805 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-10 08:19:47,806 INFO L933 BasicCegarLoop]: 476 mSDtfsCounter, 767 mSDsluCounter, 538 mSDsCounter, 0 mSdLazyCounter, 382 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 786 SdHoareTripleChecker+Valid, 1014 SdHoareTripleChecker+Invalid, 419 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 382 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 08:19:47,806 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [786 Valid, 1014 Invalid, 419 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 382 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 08:19:47,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1949 states. [2022-01-10 08:19:47,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1949 to 1949. [2022-01-10 08:19:47,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1949 states, 1848 states have (on average 1.3614718614718615) internal successors, (2516), 1850 states have internal predecessors, (2516), 59 states have call successors, (59), 40 states have call predecessors, (59), 41 states have return successors, (60), 59 states have call predecessors, (60), 59 states have call successors, (60) [2022-01-10 08:19:47,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1949 states to 1949 states and 2635 transitions. [2022-01-10 08:19:47,890 INFO L78 Accepts]: Start accepts. Automaton has 1949 states and 2635 transitions. Word has length 167 [2022-01-10 08:19:47,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:19:47,890 INFO L470 AbstractCegarLoop]: Abstraction has 1949 states and 2635 transitions. [2022-01-10 08:19:47,890 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 31.4) internal successors, (157), 4 states have internal predecessors, (157), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:19:47,890 INFO L276 IsEmpty]: Start isEmpty. Operand 1949 states and 2635 transitions. [2022-01-10 08:19:47,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-01-10 08:19:47,891 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:19:47,891 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:19:47,899 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2022-01-10 08:19:48,099 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 08:19:48,099 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:19:48,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:19:48,100 INFO L85 PathProgramCache]: Analyzing trace with hash -665015211, now seen corresponding path program 1 times [2022-01-10 08:19:48,100 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:19:48,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [831932995] [2022-01-10 08:19:48,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:19:48,100 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:19:48,100 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:19:48,101 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 08:19:48,102 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2022-01-10 08:19:48,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:19:48,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 433 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:19:48,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:19:48,336 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 08:19:48,336 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:19:48,337 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:19:48,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [831932995] [2022-01-10 08:19:48,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [831932995] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:19:48,337 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:19:48,337 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 08:19:48,337 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573080553] [2022-01-10 08:19:48,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:19:48,337 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:19:48,337 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:19:48,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:19:48,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:19:48,338 INFO L87 Difference]: Start difference. First operand 1949 states and 2635 transitions. Second operand has 5 states, 5 states have (on average 31.4) internal successors, (157), 4 states have internal predecessors, (157), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:19:48,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:19:48,729 INFO L93 Difference]: Finished difference Result 4056 states and 5521 transitions. [2022-01-10 08:19:48,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 08:19:48,729 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 31.4) internal successors, (157), 4 states have internal predecessors, (157), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 167 [2022-01-10 08:19:48,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:19:48,734 INFO L225 Difference]: With dead ends: 4056 [2022-01-10 08:19:48,734 INFO L226 Difference]: Without dead ends: 2127 [2022-01-10 08:19:48,738 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-10 08:19:48,738 INFO L933 BasicCegarLoop]: 473 mSDtfsCounter, 760 mSDsluCounter, 534 mSDsCounter, 0 mSdLazyCounter, 381 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 779 SdHoareTripleChecker+Valid, 1007 SdHoareTripleChecker+Invalid, 418 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 08:19:48,738 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [779 Valid, 1007 Invalid, 418 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 381 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 08:19:48,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2127 states. [2022-01-10 08:19:48,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2127 to 2127. [2022-01-10 08:19:48,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2127 states, 2020 states have (on average 1.348019801980198) internal successors, (2723), 2022 states have internal predecessors, (2723), 61 states have call successors, (61), 44 states have call predecessors, (61), 45 states have return successors, (62), 61 states have call predecessors, (62), 61 states have call successors, (62) [2022-01-10 08:19:48,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2127 states to 2127 states and 2846 transitions. [2022-01-10 08:19:48,873 INFO L78 Accepts]: Start accepts. Automaton has 2127 states and 2846 transitions. Word has length 167 [2022-01-10 08:19:48,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:19:48,874 INFO L470 AbstractCegarLoop]: Abstraction has 2127 states and 2846 transitions. [2022-01-10 08:19:48,874 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 31.4) internal successors, (157), 4 states have internal predecessors, (157), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:19:48,874 INFO L276 IsEmpty]: Start isEmpty. Operand 2127 states and 2846 transitions. [2022-01-10 08:19:48,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-01-10 08:19:48,874 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:19:48,874 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:19:48,893 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2022-01-10 08:19:49,082 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 08:19:49,083 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:19:49,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:19:49,083 INFO L85 PathProgramCache]: Analyzing trace with hash 1117917145, now seen corresponding path program 1 times [2022-01-10 08:19:49,083 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:19:49,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1047853687] [2022-01-10 08:19:49,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:19:49,084 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:19:49,084 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:19:49,085 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 08:19:49,086 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2022-01-10 08:19:49,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:19:49,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 431 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:19:49,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:19:49,357 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 08:19:49,357 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:19:49,357 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:19:49,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1047853687] [2022-01-10 08:19:49,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1047853687] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:19:49,357 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:19:49,357 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 08:19:49,357 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187931557] [2022-01-10 08:19:49,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:19:49,358 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:19:49,358 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:19:49,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:19:49,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:19:49,358 INFO L87 Difference]: Start difference. First operand 2127 states and 2846 transitions. Second operand has 5 states, 5 states have (on average 31.4) internal successors, (157), 4 states have internal predecessors, (157), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:19:49,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:19:49,898 INFO L93 Difference]: Finished difference Result 4412 states and 5943 transitions. [2022-01-10 08:19:49,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 08:19:49,899 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 31.4) internal successors, (157), 4 states have internal predecessors, (157), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 167 [2022-01-10 08:19:49,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:19:49,903 INFO L225 Difference]: With dead ends: 4412 [2022-01-10 08:19:49,904 INFO L226 Difference]: Without dead ends: 2305 [2022-01-10 08:19:49,906 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-10 08:19:49,907 INFO L933 BasicCegarLoop]: 470 mSDtfsCounter, 753 mSDsluCounter, 530 mSDsCounter, 0 mSdLazyCounter, 380 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 772 SdHoareTripleChecker+Valid, 1000 SdHoareTripleChecker+Invalid, 417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 380 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-10 08:19:49,907 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [772 Valid, 1000 Invalid, 417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 380 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-10 08:19:49,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2305 states. [2022-01-10 08:19:50,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2305 to 2305. [2022-01-10 08:19:50,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2305 states, 2192 states have (on average 1.3348540145985401) internal successors, (2926), 2194 states have internal predecessors, (2926), 63 states have call successors, (63), 48 states have call predecessors, (63), 49 states have return successors, (64), 63 states have call predecessors, (64), 63 states have call successors, (64) [2022-01-10 08:19:50,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2305 states to 2305 states and 3053 transitions. [2022-01-10 08:19:50,023 INFO L78 Accepts]: Start accepts. Automaton has 2305 states and 3053 transitions. Word has length 167 [2022-01-10 08:19:50,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:19:50,023 INFO L470 AbstractCegarLoop]: Abstraction has 2305 states and 3053 transitions. [2022-01-10 08:19:50,023 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 31.4) internal successors, (157), 4 states have internal predecessors, (157), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:19:50,023 INFO L276 IsEmpty]: Start isEmpty. Operand 2305 states and 3053 transitions. [2022-01-10 08:19:50,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-01-10 08:19:50,023 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:19:50,024 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:19:50,032 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (34)] Ended with exit code 0 [2022-01-10 08:19:50,233 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 08:19:50,233 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:19:50,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:19:50,234 INFO L85 PathProgramCache]: Analyzing trace with hash -1434228906, now seen corresponding path program 1 times [2022-01-10 08:19:50,234 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:19:50,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1195721564] [2022-01-10 08:19:50,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:19:50,234 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:19:50,235 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:19:50,235 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 08:19:50,237 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2022-01-10 08:19:50,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:19:50,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:19:50,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:19:50,504 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 08:19:50,504 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:19:50,504 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:19:50,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1195721564] [2022-01-10 08:19:50,504 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1195721564] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:19:50,504 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:19:50,504 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 08:19:50,504 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226454484] [2022-01-10 08:19:50,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:19:50,505 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:19:50,505 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:19:50,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:19:50,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:19:50,505 INFO L87 Difference]: Start difference. First operand 2305 states and 3053 transitions. Second operand has 5 states, 5 states have (on average 31.4) internal successors, (157), 4 states have internal predecessors, (157), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:19:50,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:19:50,960 INFO L93 Difference]: Finished difference Result 4768 states and 6357 transitions. [2022-01-10 08:19:50,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 08:19:50,961 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 31.4) internal successors, (157), 4 states have internal predecessors, (157), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 167 [2022-01-10 08:19:50,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:19:50,967 INFO L225 Difference]: With dead ends: 4768 [2022-01-10 08:19:50,967 INFO L226 Difference]: Without dead ends: 2483 [2022-01-10 08:19:50,970 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-10 08:19:50,970 INFO L933 BasicCegarLoop]: 467 mSDtfsCounter, 746 mSDsluCounter, 526 mSDsCounter, 0 mSdLazyCounter, 379 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 765 SdHoareTripleChecker+Valid, 993 SdHoareTripleChecker+Invalid, 416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 379 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 08:19:50,970 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [765 Valid, 993 Invalid, 416 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 379 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 08:19:50,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2483 states. [2022-01-10 08:19:51,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2483 to 2483. [2022-01-10 08:19:51,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2483 states, 2364 states have (on average 1.321912013536379) internal successors, (3125), 2366 states have internal predecessors, (3125), 65 states have call successors, (65), 52 states have call predecessors, (65), 53 states have return successors, (66), 65 states have call predecessors, (66), 65 states have call successors, (66) [2022-01-10 08:19:51,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2483 states to 2483 states and 3256 transitions. [2022-01-10 08:19:51,143 INFO L78 Accepts]: Start accepts. Automaton has 2483 states and 3256 transitions. Word has length 167 [2022-01-10 08:19:51,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:19:51,143 INFO L470 AbstractCegarLoop]: Abstraction has 2483 states and 3256 transitions. [2022-01-10 08:19:51,143 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 31.4) internal successors, (157), 4 states have internal predecessors, (157), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:19:51,143 INFO L276 IsEmpty]: Start isEmpty. Operand 2483 states and 3256 transitions. [2022-01-10 08:19:51,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-01-10 08:19:51,144 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:19:51,144 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:19:51,157 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (35)] Forceful destruction successful, exit code 0 [2022-01-10 08:19:51,354 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 08:19:51,355 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:19:51,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:19:51,355 INFO L85 PathProgramCache]: Analyzing trace with hash -149693478, now seen corresponding path program 1 times [2022-01-10 08:19:51,356 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:19:51,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [502156656] [2022-01-10 08:19:51,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:19:51,356 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:19:51,356 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:19:51,357 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 08:19:51,359 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2022-01-10 08:19:51,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:19:51,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:19:51,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:19:51,744 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 08:19:51,744 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:19:51,745 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:19:51,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [502156656] [2022-01-10 08:19:51,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [502156656] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:19:51,745 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:19:51,745 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 08:19:51,745 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466553162] [2022-01-10 08:19:51,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:19:51,746 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:19:51,746 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:19:51,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:19:51,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:19:51,747 INFO L87 Difference]: Start difference. First operand 2483 states and 3256 transitions. Second operand has 5 states, 5 states have (on average 31.4) internal successors, (157), 4 states have internal predecessors, (157), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:19:52,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:19:52,309 INFO L93 Difference]: Finished difference Result 5124 states and 6763 transitions. [2022-01-10 08:19:52,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 08:19:52,310 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 31.4) internal successors, (157), 4 states have internal predecessors, (157), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 167 [2022-01-10 08:19:52,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:19:52,315 INFO L225 Difference]: With dead ends: 5124 [2022-01-10 08:19:52,315 INFO L226 Difference]: Without dead ends: 2661 [2022-01-10 08:19:52,318 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-10 08:19:52,319 INFO L933 BasicCegarLoop]: 464 mSDtfsCounter, 739 mSDsluCounter, 522 mSDsCounter, 0 mSdLazyCounter, 378 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 758 SdHoareTripleChecker+Valid, 986 SdHoareTripleChecker+Invalid, 415 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 378 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-10 08:19:52,319 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [758 Valid, 986 Invalid, 415 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 378 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-10 08:19:52,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2661 states. [2022-01-10 08:19:52,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2661 to 2661. [2022-01-10 08:19:52,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2661 states, 2536 states have (on average 1.3091482649842272) internal successors, (3320), 2538 states have internal predecessors, (3320), 67 states have call successors, (67), 56 states have call predecessors, (67), 57 states have return successors, (68), 67 states have call predecessors, (68), 67 states have call successors, (68) [2022-01-10 08:19:52,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2661 states to 2661 states and 3455 transitions. [2022-01-10 08:19:52,459 INFO L78 Accepts]: Start accepts. Automaton has 2661 states and 3455 transitions. Word has length 167 [2022-01-10 08:19:52,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:19:52,459 INFO L470 AbstractCegarLoop]: Abstraction has 2661 states and 3455 transitions. [2022-01-10 08:19:52,459 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 31.4) internal successors, (157), 4 states have internal predecessors, (157), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:19:52,459 INFO L276 IsEmpty]: Start isEmpty. Operand 2661 states and 3455 transitions. [2022-01-10 08:19:52,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-01-10 08:19:52,460 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:19:52,460 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:19:52,472 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (36)] Forceful destruction successful, exit code 0 [2022-01-10 08:19:52,668 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 08:19:52,668 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:19:52,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:19:52,668 INFO L85 PathProgramCache]: Analyzing trace with hash -823624745, now seen corresponding path program 1 times [2022-01-10 08:19:52,668 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:19:52,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [100111180] [2022-01-10 08:19:52,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:19:52,669 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:19:52,669 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:19:52,684 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 08:19:52,717 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2022-01-10 08:19:52,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:19:52,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 423 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:19:52,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:19:52,968 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 08:19:52,969 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:19:52,969 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:19:52,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [100111180] [2022-01-10 08:19:52,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [100111180] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:19:52,969 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:19:52,969 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 08:19:52,969 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101235124] [2022-01-10 08:19:52,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:19:52,970 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:19:52,970 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:19:52,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:19:52,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:19:52,970 INFO L87 Difference]: Start difference. First operand 2661 states and 3455 transitions. Second operand has 5 states, 5 states have (on average 31.4) internal successors, (157), 5 states have internal predecessors, (157), 2 states have call successors, (5), 2 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 08:19:53,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:19:53,178 INFO L93 Difference]: Finished difference Result 5623 states and 7344 transitions. [2022-01-10 08:19:53,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 08:19:53,178 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 31.4) internal successors, (157), 5 states have internal predecessors, (157), 2 states have call successors, (5), 2 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 167 [2022-01-10 08:19:53,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:19:53,190 INFO L225 Difference]: With dead ends: 5623 [2022-01-10 08:19:53,190 INFO L226 Difference]: Without dead ends: 2983 [2022-01-10 08:19:53,195 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-01-10 08:19:53,195 INFO L933 BasicCegarLoop]: 490 mSDtfsCounter, 440 mSDsluCounter, 1639 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 440 SdHoareTripleChecker+Valid, 2129 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 08:19:53,196 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [440 Valid, 2129 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:19:53,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2983 states. [2022-01-10 08:19:53,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2983 to 2667. [2022-01-10 08:19:53,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2667 states, 2542 states have (on average 1.2997639653815893) internal successors, (3304), 2544 states have internal predecessors, (3304), 67 states have call successors, (67), 56 states have call predecessors, (67), 57 states have return successors, (68), 67 states have call predecessors, (68), 67 states have call successors, (68) [2022-01-10 08:19:53,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2667 states to 2667 states and 3439 transitions. [2022-01-10 08:19:53,371 INFO L78 Accepts]: Start accepts. Automaton has 2667 states and 3439 transitions. Word has length 167 [2022-01-10 08:19:53,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:19:53,372 INFO L470 AbstractCegarLoop]: Abstraction has 2667 states and 3439 transitions. [2022-01-10 08:19:53,372 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 31.4) internal successors, (157), 5 states have internal predecessors, (157), 2 states have call successors, (5), 2 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 08:19:53,372 INFO L276 IsEmpty]: Start isEmpty. Operand 2667 states and 3439 transitions. [2022-01-10 08:19:53,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-01-10 08:19:53,374 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:19:53,374 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:19:53,392 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (37)] Forceful destruction successful, exit code 0 [2022-01-10 08:19:53,582 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 08:19:53,583 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:19:53,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:19:53,583 INFO L85 PathProgramCache]: Analyzing trace with hash 903520217, now seen corresponding path program 1 times [2022-01-10 08:19:53,583 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:19:53,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1895880418] [2022-01-10 08:19:53,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:19:53,584 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:19:53,584 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:19:53,584 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 08:19:53,586 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2022-01-10 08:19:53,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:19:53,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 422 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:19:53,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:19:53,906 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 08:19:53,906 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:19:53,906 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:19:53,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1895880418] [2022-01-10 08:19:53,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1895880418] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:19:53,906 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:19:53,906 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 08:19:53,906 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636837417] [2022-01-10 08:19:53,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:19:53,907 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:19:53,907 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:19:53,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:19:53,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:19:53,907 INFO L87 Difference]: Start difference. First operand 2667 states and 3439 transitions. Second operand has 5 states, 5 states have (on average 31.4) internal successors, (157), 5 states have internal predecessors, (157), 2 states have call successors, (5), 2 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 08:19:54,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:19:54,161 INFO L93 Difference]: Finished difference Result 5607 states and 7276 transitions. [2022-01-10 08:19:54,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 08:19:54,162 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 31.4) internal successors, (157), 5 states have internal predecessors, (157), 2 states have call successors, (5), 2 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 167 [2022-01-10 08:19:54,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:19:54,169 INFO L225 Difference]: With dead ends: 5607 [2022-01-10 08:19:54,169 INFO L226 Difference]: Without dead ends: 2961 [2022-01-10 08:19:54,175 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-01-10 08:19:54,176 INFO L933 BasicCegarLoop]: 490 mSDtfsCounter, 401 mSDsluCounter, 1624 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 401 SdHoareTripleChecker+Valid, 2114 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 08:19:54,176 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [401 Valid, 2114 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:19:54,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2961 states. [2022-01-10 08:19:54,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2961 to 2673. [2022-01-10 08:19:54,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2673 states, 2548 states have (on average 1.2904238618524333) internal successors, (3288), 2550 states have internal predecessors, (3288), 67 states have call successors, (67), 56 states have call predecessors, (67), 57 states have return successors, (68), 67 states have call predecessors, (68), 67 states have call successors, (68) [2022-01-10 08:19:54,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2673 states to 2673 states and 3423 transitions. [2022-01-10 08:19:54,354 INFO L78 Accepts]: Start accepts. Automaton has 2673 states and 3423 transitions. Word has length 167 [2022-01-10 08:19:54,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:19:54,354 INFO L470 AbstractCegarLoop]: Abstraction has 2673 states and 3423 transitions. [2022-01-10 08:19:54,354 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 31.4) internal successors, (157), 5 states have internal predecessors, (157), 2 states have call successors, (5), 2 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 08:19:54,354 INFO L276 IsEmpty]: Start isEmpty. Operand 2673 states and 3423 transitions. [2022-01-10 08:19:54,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-01-10 08:19:54,355 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:19:54,355 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:19:54,373 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (38)] Forceful destruction successful, exit code 0 [2022-01-10 08:19:54,563 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 08:19:54,563 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:19:54,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:19:54,564 INFO L85 PathProgramCache]: Analyzing trace with hash -1238340261, now seen corresponding path program 1 times [2022-01-10 08:19:54,565 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:19:54,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1513759135] [2022-01-10 08:19:54,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:19:54,565 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:19:54,565 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:19:54,566 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 08:19:54,567 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2022-01-10 08:19:54,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:19:54,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 421 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:19:54,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:19:54,887 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 08:19:54,887 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:19:54,888 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:19:54,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1513759135] [2022-01-10 08:19:54,888 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1513759135] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:19:54,888 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:19:54,888 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 08:19:54,888 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934888073] [2022-01-10 08:19:54,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:19:54,889 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:19:54,889 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:19:54,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:19:54,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:19:54,890 INFO L87 Difference]: Start difference. First operand 2673 states and 3423 transitions. Second operand has 5 states, 5 states have (on average 31.4) internal successors, (157), 5 states have internal predecessors, (157), 2 states have call successors, (5), 2 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 08:19:55,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:19:55,124 INFO L93 Difference]: Finished difference Result 5591 states and 7208 transitions. [2022-01-10 08:19:55,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 08:19:55,124 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 31.4) internal successors, (157), 5 states have internal predecessors, (157), 2 states have call successors, (5), 2 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 167 [2022-01-10 08:19:55,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:19:55,133 INFO L225 Difference]: With dead ends: 5591 [2022-01-10 08:19:55,133 INFO L226 Difference]: Without dead ends: 2939 [2022-01-10 08:19:55,138 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-01-10 08:19:55,138 INFO L933 BasicCegarLoop]: 490 mSDtfsCounter, 362 mSDsluCounter, 1609 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 362 SdHoareTripleChecker+Valid, 2099 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 08:19:55,138 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [362 Valid, 2099 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:19:55,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2939 states. [2022-01-10 08:19:55,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2939 to 2679. [2022-01-10 08:19:55,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2679 states, 2554 states have (on average 1.2811276429130776) internal successors, (3272), 2556 states have internal predecessors, (3272), 67 states have call successors, (67), 56 states have call predecessors, (67), 57 states have return successors, (68), 67 states have call predecessors, (68), 67 states have call successors, (68) [2022-01-10 08:19:55,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2679 states to 2679 states and 3407 transitions. [2022-01-10 08:19:55,364 INFO L78 Accepts]: Start accepts. Automaton has 2679 states and 3407 transitions. Word has length 167 [2022-01-10 08:19:55,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:19:55,364 INFO L470 AbstractCegarLoop]: Abstraction has 2679 states and 3407 transitions. [2022-01-10 08:19:55,364 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 31.4) internal successors, (157), 5 states have internal predecessors, (157), 2 states have call successors, (5), 2 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 08:19:55,364 INFO L276 IsEmpty]: Start isEmpty. Operand 2679 states and 3407 transitions. [2022-01-10 08:19:55,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-01-10 08:19:55,365 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:19:55,365 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:19:55,375 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (39)] Forceful destruction successful, exit code 0 [2022-01-10 08:19:55,573 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 08:19:55,574 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:19:55,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:19:55,574 INFO L85 PathProgramCache]: Analyzing trace with hash 1749484637, now seen corresponding path program 1 times [2022-01-10 08:19:55,574 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:19:55,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [369143825] [2022-01-10 08:19:55,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:19:55,575 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:19:55,575 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:19:55,591 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 08:19:55,632 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2022-01-10 08:19:55,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:19:55,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:19:55,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:19:55,911 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 08:19:55,911 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:19:55,911 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:19:55,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [369143825] [2022-01-10 08:19:55,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [369143825] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:19:55,911 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:19:55,911 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 08:19:55,911 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506637729] [2022-01-10 08:19:55,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:19:55,912 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:19:55,912 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:19:55,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:19:55,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:19:55,913 INFO L87 Difference]: Start difference. First operand 2679 states and 3407 transitions. Second operand has 5 states, 5 states have (on average 31.4) internal successors, (157), 5 states have internal predecessors, (157), 2 states have call successors, (5), 2 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 08:19:56,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:19:56,133 INFO L93 Difference]: Finished difference Result 5575 states and 7140 transitions. [2022-01-10 08:19:56,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 08:19:56,133 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 31.4) internal successors, (157), 5 states have internal predecessors, (157), 2 states have call successors, (5), 2 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 167 [2022-01-10 08:19:56,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:19:56,139 INFO L225 Difference]: With dead ends: 5575 [2022-01-10 08:19:56,139 INFO L226 Difference]: Without dead ends: 2917 [2022-01-10 08:19:56,143 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-01-10 08:19:56,144 INFO L933 BasicCegarLoop]: 490 mSDtfsCounter, 323 mSDsluCounter, 1594 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 323 SdHoareTripleChecker+Valid, 2084 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 08:19:56,144 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [323 Valid, 2084 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:19:56,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2917 states. [2022-01-10 08:19:56,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2917 to 2685. [2022-01-10 08:19:56,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2685 states, 2560 states have (on average 1.271875) internal successors, (3256), 2562 states have internal predecessors, (3256), 67 states have call successors, (67), 56 states have call predecessors, (67), 57 states have return successors, (68), 67 states have call predecessors, (68), 67 states have call successors, (68) [2022-01-10 08:19:56,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2685 states to 2685 states and 3391 transitions. [2022-01-10 08:19:56,349 INFO L78 Accepts]: Start accepts. Automaton has 2685 states and 3391 transitions. Word has length 167 [2022-01-10 08:19:56,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:19:56,349 INFO L470 AbstractCegarLoop]: Abstraction has 2685 states and 3391 transitions. [2022-01-10 08:19:56,349 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 31.4) internal successors, (157), 5 states have internal predecessors, (157), 2 states have call successors, (5), 2 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 08:19:56,349 INFO L276 IsEmpty]: Start isEmpty. Operand 2685 states and 3391 transitions. [2022-01-10 08:19:56,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-01-10 08:19:56,350 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:19:56,351 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:19:56,359 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (40)] Forceful destruction successful, exit code 0 [2022-01-10 08:19:56,560 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 08:19:56,560 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:19:56,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:19:56,561 INFO L85 PathProgramCache]: Analyzing trace with hash -1194097441, now seen corresponding path program 1 times [2022-01-10 08:19:56,561 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:19:56,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [234952223] [2022-01-10 08:19:56,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:19:56,562 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:19:56,562 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:19:56,563 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 08:19:56,565 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2022-01-10 08:19:56,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:19:56,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:19:56,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:19:56,889 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 08:19:56,889 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:19:56,890 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:19:56,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [234952223] [2022-01-10 08:19:56,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [234952223] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:19:56,890 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:19:56,890 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 08:19:56,890 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780250016] [2022-01-10 08:19:56,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:19:56,890 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:19:56,890 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:19:56,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:19:56,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:19:56,891 INFO L87 Difference]: Start difference. First operand 2685 states and 3391 transitions. Second operand has 5 states, 5 states have (on average 31.4) internal successors, (157), 5 states have internal predecessors, (157), 2 states have call successors, (5), 2 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 08:19:57,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:19:57,165 INFO L93 Difference]: Finished difference Result 5559 states and 7072 transitions. [2022-01-10 08:19:57,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 08:19:57,166 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 31.4) internal successors, (157), 5 states have internal predecessors, (157), 2 states have call successors, (5), 2 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 167 [2022-01-10 08:19:57,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:19:57,171 INFO L225 Difference]: With dead ends: 5559 [2022-01-10 08:19:57,171 INFO L226 Difference]: Without dead ends: 2895 [2022-01-10 08:19:57,175 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-01-10 08:19:57,175 INFO L933 BasicCegarLoop]: 490 mSDtfsCounter, 284 mSDsluCounter, 1579 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 284 SdHoareTripleChecker+Valid, 2069 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 08:19:57,175 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [284 Valid, 2069 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:19:57,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2895 states. [2022-01-10 08:19:57,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2895 to 2691. [2022-01-10 08:19:57,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2691 states, 2566 states have (on average 1.2626656274356975) internal successors, (3240), 2568 states have internal predecessors, (3240), 67 states have call successors, (67), 56 states have call predecessors, (67), 57 states have return successors, (68), 67 states have call predecessors, (68), 67 states have call successors, (68) [2022-01-10 08:19:57,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2691 states to 2691 states and 3375 transitions. [2022-01-10 08:19:57,363 INFO L78 Accepts]: Start accepts. Automaton has 2691 states and 3375 transitions. Word has length 167 [2022-01-10 08:19:57,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:19:57,363 INFO L470 AbstractCegarLoop]: Abstraction has 2691 states and 3375 transitions. [2022-01-10 08:19:57,363 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 31.4) internal successors, (157), 5 states have internal predecessors, (157), 2 states have call successors, (5), 2 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 08:19:57,363 INFO L276 IsEmpty]: Start isEmpty. Operand 2691 states and 3375 transitions. [2022-01-10 08:19:57,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-01-10 08:19:57,364 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:19:57,364 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:19:57,371 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (41)] Forceful destruction successful, exit code 0 [2022-01-10 08:19:57,571 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 08:19:57,572 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:19:57,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:19:57,572 INFO L85 PathProgramCache]: Analyzing trace with hash -1964831007, now seen corresponding path program 1 times [2022-01-10 08:19:57,572 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:19:57,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [624581624] [2022-01-10 08:19:57,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:19:57,573 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:19:57,573 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:19:57,574 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 08:19:57,575 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2022-01-10 08:19:57,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:19:57,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 418 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:19:57,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:19:57,873 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 08:19:57,873 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:19:57,873 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:19:57,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [624581624] [2022-01-10 08:19:57,873 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [624581624] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:19:57,873 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:19:57,873 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 08:19:57,874 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608171231] [2022-01-10 08:19:57,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:19:57,874 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:19:57,874 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:19:57,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:19:57,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:19:57,876 INFO L87 Difference]: Start difference. First operand 2691 states and 3375 transitions. Second operand has 5 states, 5 states have (on average 31.4) internal successors, (157), 5 states have internal predecessors, (157), 2 states have call successors, (5), 2 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 08:19:58,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:19:58,150 INFO L93 Difference]: Finished difference Result 5543 states and 7004 transitions. [2022-01-10 08:19:58,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 08:19:58,150 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 31.4) internal successors, (157), 5 states have internal predecessors, (157), 2 states have call successors, (5), 2 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 167 [2022-01-10 08:19:58,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:19:58,155 INFO L225 Difference]: With dead ends: 5543 [2022-01-10 08:19:58,155 INFO L226 Difference]: Without dead ends: 2873 [2022-01-10 08:19:58,158 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-01-10 08:19:58,158 INFO L933 BasicCegarLoop]: 490 mSDtfsCounter, 245 mSDsluCounter, 1564 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 245 SdHoareTripleChecker+Valid, 2054 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 08:19:58,159 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [245 Valid, 2054 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:19:58,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2873 states. [2022-01-10 08:19:58,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2873 to 2697. [2022-01-10 08:19:58,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2697 states, 2572 states have (on average 1.2534992223950234) internal successors, (3224), 2574 states have internal predecessors, (3224), 67 states have call successors, (67), 56 states have call predecessors, (67), 57 states have return successors, (68), 67 states have call predecessors, (68), 67 states have call successors, (68) [2022-01-10 08:19:58,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2697 states to 2697 states and 3359 transitions. [2022-01-10 08:19:58,371 INFO L78 Accepts]: Start accepts. Automaton has 2697 states and 3359 transitions. Word has length 167 [2022-01-10 08:19:58,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:19:58,371 INFO L470 AbstractCegarLoop]: Abstraction has 2697 states and 3359 transitions. [2022-01-10 08:19:58,371 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 31.4) internal successors, (157), 5 states have internal predecessors, (157), 2 states have call successors, (5), 2 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 08:19:58,371 INFO L276 IsEmpty]: Start isEmpty. Operand 2697 states and 3359 transitions. [2022-01-10 08:19:58,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-01-10 08:19:58,372 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:19:58,372 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:19:58,380 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (42)] Forceful destruction successful, exit code 0 [2022-01-10 08:19:58,573 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 08:19:58,573 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:19:58,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:19:58,573 INFO L85 PathProgramCache]: Analyzing trace with hash -639974813, now seen corresponding path program 1 times [2022-01-10 08:19:58,574 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:19:58,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1453693683] [2022-01-10 08:19:58,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:19:58,574 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:19:58,574 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:19:58,575 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 08:19:58,576 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2022-01-10 08:19:58,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:19:58,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:19:58,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:19:58,869 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 08:19:58,869 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:19:58,869 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:19:58,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1453693683] [2022-01-10 08:19:58,869 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1453693683] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:19:58,870 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:19:58,870 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 08:19:58,870 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952377408] [2022-01-10 08:19:58,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:19:58,870 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:19:58,870 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:19:58,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:19:58,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:19:58,871 INFO L87 Difference]: Start difference. First operand 2697 states and 3359 transitions. Second operand has 5 states, 5 states have (on average 31.4) internal successors, (157), 5 states have internal predecessors, (157), 2 states have call successors, (5), 2 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 08:19:59,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:19:59,096 INFO L93 Difference]: Finished difference Result 5499 states and 6896 transitions. [2022-01-10 08:19:59,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 08:19:59,096 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 31.4) internal successors, (157), 5 states have internal predecessors, (157), 2 states have call successors, (5), 2 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 167 [2022-01-10 08:19:59,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:19:59,101 INFO L225 Difference]: With dead ends: 5499 [2022-01-10 08:19:59,101 INFO L226 Difference]: Without dead ends: 2823 [2022-01-10 08:19:59,104 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-01-10 08:19:59,104 INFO L933 BasicCegarLoop]: 490 mSDtfsCounter, 166 mSDsluCounter, 1529 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 2019 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 08:19:59,104 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [166 Valid, 2019 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:19:59,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2823 states. [2022-01-10 08:19:59,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2823 to 2703. [2022-01-10 08:19:59,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2703 states, 2578 states have (on average 1.244375484871994) internal successors, (3208), 2580 states have internal predecessors, (3208), 67 states have call successors, (67), 56 states have call predecessors, (67), 57 states have return successors, (68), 67 states have call predecessors, (68), 67 states have call successors, (68) [2022-01-10 08:19:59,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2703 states to 2703 states and 3343 transitions. [2022-01-10 08:19:59,317 INFO L78 Accepts]: Start accepts. Automaton has 2703 states and 3343 transitions. Word has length 167 [2022-01-10 08:19:59,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:19:59,317 INFO L470 AbstractCegarLoop]: Abstraction has 2703 states and 3343 transitions. [2022-01-10 08:19:59,317 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 31.4) internal successors, (157), 5 states have internal predecessors, (157), 2 states have call successors, (5), 2 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 08:19:59,317 INFO L276 IsEmpty]: Start isEmpty. Operand 2703 states and 3343 transitions. [2022-01-10 08:19:59,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-01-10 08:19:59,318 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:19:59,318 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:19:59,325 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (43)] Forceful destruction successful, exit code 0 [2022-01-10 08:19:59,525 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 08:19:59,526 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:19:59,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:19:59,526 INFO L85 PathProgramCache]: Analyzing trace with hash -1607325467, now seen corresponding path program 1 times [2022-01-10 08:19:59,526 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:19:59,526 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [34121030] [2022-01-10 08:19:59,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:19:59,526 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:19:59,527 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:19:59,528 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 08:19:59,530 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2022-01-10 08:19:59,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:19:59,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 416 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:19:59,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:19:59,865 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 08:19:59,866 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:19:59,866 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:19:59,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [34121030] [2022-01-10 08:19:59,867 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [34121030] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:19:59,867 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:19:59,867 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 08:19:59,867 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281778385] [2022-01-10 08:19:59,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:19:59,868 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:19:59,868 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:19:59,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:19:59,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:19:59,869 INFO L87 Difference]: Start difference. First operand 2703 states and 3343 transitions. Second operand has 5 states, 5 states have (on average 31.4) internal successors, (157), 5 states have internal predecessors, (157), 2 states have call successors, (5), 2 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 08:20:00,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:20:00,115 INFO L93 Difference]: Finished difference Result 5483 states and 6828 transitions. [2022-01-10 08:20:00,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 08:20:00,116 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 31.4) internal successors, (157), 5 states have internal predecessors, (157), 2 states have call successors, (5), 2 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 167 [2022-01-10 08:20:00,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:20:00,121 INFO L225 Difference]: With dead ends: 5483 [2022-01-10 08:20:00,121 INFO L226 Difference]: Without dead ends: 2801 [2022-01-10 08:20:00,126 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-01-10 08:20:00,141 INFO L933 BasicCegarLoop]: 490 mSDtfsCounter, 127 mSDsluCounter, 1514 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 2004 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 08:20:00,141 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 2004 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:20:00,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2801 states. [2022-01-10 08:20:00,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2801 to 2709. [2022-01-10 08:20:00,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2709 states, 2584 states have (on average 1.2352941176470589) internal successors, (3192), 2586 states have internal predecessors, (3192), 67 states have call successors, (67), 56 states have call predecessors, (67), 57 states have return successors, (68), 67 states have call predecessors, (68), 67 states have call successors, (68) [2022-01-10 08:20:00,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2709 states to 2709 states and 3327 transitions. [2022-01-10 08:20:00,425 INFO L78 Accepts]: Start accepts. Automaton has 2709 states and 3327 transitions. Word has length 167 [2022-01-10 08:20:00,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:20:00,426 INFO L470 AbstractCegarLoop]: Abstraction has 2709 states and 3327 transitions. [2022-01-10 08:20:00,426 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 31.4) internal successors, (157), 5 states have internal predecessors, (157), 2 states have call successors, (5), 2 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 08:20:00,427 INFO L276 IsEmpty]: Start isEmpty. Operand 2709 states and 3327 transitions. [2022-01-10 08:20:00,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-01-10 08:20:00,433 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:20:00,433 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:20:00,444 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (44)] Forceful destruction successful, exit code 0 [2022-01-10 08:20:00,643 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 08:20:00,644 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:20:00,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:20:00,644 INFO L85 PathProgramCache]: Analyzing trace with hash 1001461991, now seen corresponding path program 1 times [2022-01-10 08:20:00,644 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:20:00,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1621147581] [2022-01-10 08:20:00,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:20:00,644 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:20:00,645 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:20:00,645 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 08:20:00,647 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (45)] Waiting until timeout for monitored process [2022-01-10 08:20:00,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:20:00,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:20:00,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:20:00,964 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 08:20:00,965 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:20:00,965 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:20:00,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1621147581] [2022-01-10 08:20:00,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1621147581] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:20:00,965 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:20:00,965 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 08:20:00,965 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167537865] [2022-01-10 08:20:00,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:20:00,965 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:20:00,966 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:20:00,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:20:00,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:20:00,966 INFO L87 Difference]: Start difference. First operand 2709 states and 3327 transitions. Second operand has 5 states, 5 states have (on average 31.4) internal successors, (157), 5 states have internal predecessors, (157), 2 states have call successors, (5), 2 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 08:20:01,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:20:01,220 INFO L93 Difference]: Finished difference Result 5467 states and 6760 transitions. [2022-01-10 08:20:01,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 08:20:01,221 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 31.4) internal successors, (157), 5 states have internal predecessors, (157), 2 states have call successors, (5), 2 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 167 [2022-01-10 08:20:01,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:20:01,226 INFO L225 Difference]: With dead ends: 5467 [2022-01-10 08:20:01,226 INFO L226 Difference]: Without dead ends: 2779 [2022-01-10 08:20:01,229 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-01-10 08:20:01,229 INFO L933 BasicCegarLoop]: 490 mSDtfsCounter, 88 mSDsluCounter, 1499 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 1989 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 08:20:01,229 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 1989 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:20:01,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2779 states. [2022-01-10 08:20:01,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2779 to 2715. [2022-01-10 08:20:01,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2715 states, 2590 states have (on average 1.2262548262548263) internal successors, (3176), 2592 states have internal predecessors, (3176), 67 states have call successors, (67), 56 states have call predecessors, (67), 57 states have return successors, (68), 67 states have call predecessors, (68), 67 states have call successors, (68) [2022-01-10 08:20:01,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2715 states to 2715 states and 3311 transitions. [2022-01-10 08:20:01,461 INFO L78 Accepts]: Start accepts. Automaton has 2715 states and 3311 transitions. Word has length 167 [2022-01-10 08:20:01,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:20:01,461 INFO L470 AbstractCegarLoop]: Abstraction has 2715 states and 3311 transitions. [2022-01-10 08:20:01,461 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 31.4) internal successors, (157), 5 states have internal predecessors, (157), 2 states have call successors, (5), 2 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 08:20:01,461 INFO L276 IsEmpty]: Start isEmpty. Operand 2715 states and 3311 transitions. [2022-01-10 08:20:01,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-01-10 08:20:01,462 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:20:01,462 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:20:01,469 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (45)] Forceful destruction successful, exit code 0 [2022-01-10 08:20:01,669 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 08:20:01,670 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:20:01,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:20:01,670 INFO L85 PathProgramCache]: Analyzing trace with hash 1562161769, now seen corresponding path program 1 times [2022-01-10 08:20:01,670 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:20:01,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1254057328] [2022-01-10 08:20:01,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:20:01,670 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:20:01,671 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:20:01,673 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 08:20:01,674 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (46)] Waiting until timeout for monitored process [2022-01-10 08:20:01,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:20:01,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 414 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:20:01,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:20:02,042 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 08:20:02,042 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:20:02,042 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:20:02,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1254057328] [2022-01-10 08:20:02,043 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1254057328] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:20:02,043 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:20:02,043 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 08:20:02,043 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354931679] [2022-01-10 08:20:02,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:20:02,043 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:20:02,043 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:20:02,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:20:02,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:20:02,044 INFO L87 Difference]: Start difference. First operand 2715 states and 3311 transitions. Second operand has 5 states, 5 states have (on average 31.4) internal successors, (157), 5 states have internal predecessors, (157), 2 states have call successors, (5), 2 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 08:20:02,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:20:02,413 INFO L93 Difference]: Finished difference Result 5451 states and 6692 transitions. [2022-01-10 08:20:02,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 08:20:02,413 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 31.4) internal successors, (157), 5 states have internal predecessors, (157), 2 states have call successors, (5), 2 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 167 [2022-01-10 08:20:02,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:20:02,442 INFO L225 Difference]: With dead ends: 5451 [2022-01-10 08:20:02,442 INFO L226 Difference]: Without dead ends: 2757 [2022-01-10 08:20:02,445 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-01-10 08:20:02,447 INFO L933 BasicCegarLoop]: 490 mSDtfsCounter, 49 mSDsluCounter, 1484 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 1974 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 08:20:02,447 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 1974 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:20:02,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2757 states. [2022-01-10 08:20:02,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2757 to 2721. [2022-01-10 08:20:02,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2721 states, 2596 states have (on average 1.2172573189522342) internal successors, (3160), 2598 states have internal predecessors, (3160), 67 states have call successors, (67), 56 states have call predecessors, (67), 57 states have return successors, (68), 67 states have call predecessors, (68), 67 states have call successors, (68) [2022-01-10 08:20:02,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2721 states to 2721 states and 3295 transitions. [2022-01-10 08:20:02,696 INFO L78 Accepts]: Start accepts. Automaton has 2721 states and 3295 transitions. Word has length 167 [2022-01-10 08:20:02,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:20:02,696 INFO L470 AbstractCegarLoop]: Abstraction has 2721 states and 3295 transitions. [2022-01-10 08:20:02,696 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 31.4) internal successors, (157), 5 states have internal predecessors, (157), 2 states have call successors, (5), 2 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 08:20:02,696 INFO L276 IsEmpty]: Start isEmpty. Operand 2721 states and 3295 transitions. [2022-01-10 08:20:02,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-01-10 08:20:02,697 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:20:02,697 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:20:02,705 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (46)] Forceful destruction successful, exit code 0 [2022-01-10 08:20:02,905 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 08:20:02,905 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:20:02,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:20:02,907 INFO L85 PathProgramCache]: Analyzing trace with hash 2006062443, now seen corresponding path program 1 times [2022-01-10 08:20:02,907 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:20:02,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [937575086] [2022-01-10 08:20:02,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:20:02,907 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:20:02,907 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:20:02,908 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 08:20:02,911 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (47)] Waiting until timeout for monitored process [2022-01-10 08:20:03,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:20:03,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:20:03,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:20:03,263 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 08:20:03,263 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:20:03,263 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:20:03,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [937575086] [2022-01-10 08:20:03,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [937575086] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:20:03,263 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:20:03,263 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 08:20:03,263 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709593371] [2022-01-10 08:20:03,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:20:03,264 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:20:03,264 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:20:03,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:20:03,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:20:03,264 INFO L87 Difference]: Start difference. First operand 2721 states and 3295 transitions. Second operand has 5 states, 5 states have (on average 31.4) internal successors, (157), 5 states have internal predecessors, (157), 2 states have call successors, (5), 2 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 08:20:03,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:20:03,532 INFO L93 Difference]: Finished difference Result 5435 states and 6624 transitions. [2022-01-10 08:20:03,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 08:20:03,533 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 31.4) internal successors, (157), 5 states have internal predecessors, (157), 2 states have call successors, (5), 2 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 167 [2022-01-10 08:20:03,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:20:03,539 INFO L225 Difference]: With dead ends: 5435 [2022-01-10 08:20:03,539 INFO L226 Difference]: Without dead ends: 2735 [2022-01-10 08:20:03,542 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-01-10 08:20:03,544 INFO L933 BasicCegarLoop]: 490 mSDtfsCounter, 10 mSDsluCounter, 1469 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 1959 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 08:20:03,545 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 1959 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:20:03,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2735 states. [2022-01-10 08:20:03,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2735 to 2727. [2022-01-10 08:20:03,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2727 states, 2602 states have (on average 1.2083013066871637) internal successors, (3144), 2604 states have internal predecessors, (3144), 67 states have call successors, (67), 56 states have call predecessors, (67), 57 states have return successors, (68), 67 states have call predecessors, (68), 67 states have call successors, (68) [2022-01-10 08:20:03,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2727 states to 2727 states and 3279 transitions. [2022-01-10 08:20:03,779 INFO L78 Accepts]: Start accepts. Automaton has 2727 states and 3279 transitions. Word has length 167 [2022-01-10 08:20:03,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:20:03,779 INFO L470 AbstractCegarLoop]: Abstraction has 2727 states and 3279 transitions. [2022-01-10 08:20:03,779 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 31.4) internal successors, (157), 5 states have internal predecessors, (157), 2 states have call successors, (5), 2 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 08:20:03,779 INFO L276 IsEmpty]: Start isEmpty. Operand 2727 states and 3279 transitions. [2022-01-10 08:20:03,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-01-10 08:20:03,780 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:20:03,780 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:20:03,788 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (47)] Forceful destruction successful, exit code 0 [2022-01-10 08:20:03,989 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 08:20:03,989 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:20:03,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:20:03,989 INFO L85 PathProgramCache]: Analyzing trace with hash 1652974061, now seen corresponding path program 1 times [2022-01-10 08:20:03,990 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:20:03,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [244495796] [2022-01-10 08:20:03,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:20:03,990 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:20:03,990 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:20:03,991 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 08:20:03,993 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (48)] Waiting until timeout for monitored process [2022-01-10 08:20:04,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:20:04,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-10 08:20:04,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:20:04,422 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 08:20:04,422 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:20:04,422 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:20:04,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [244495796] [2022-01-10 08:20:04,422 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [244495796] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:20:04,422 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:20:04,422 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 08:20:04,422 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183243179] [2022-01-10 08:20:04,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:20:04,422 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:20:04,423 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:20:04,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:20:04,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:20:04,423 INFO L87 Difference]: Start difference. First operand 2727 states and 3279 transitions. Second operand has 5 states, 5 states have (on average 31.4) internal successors, (157), 4 states have internal predecessors, (157), 2 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:20:05,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:20:05,094 INFO L93 Difference]: Finished difference Result 5434 states and 6533 transitions. [2022-01-10 08:20:05,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 08:20:05,095 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 31.4) internal successors, (157), 4 states have internal predecessors, (157), 2 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 167 [2022-01-10 08:20:05,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:20:05,100 INFO L225 Difference]: With dead ends: 5434 [2022-01-10 08:20:05,100 INFO L226 Difference]: Without dead ends: 2727 [2022-01-10 08:20:05,102 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-10 08:20:05,103 INFO L933 BasicCegarLoop]: 462 mSDtfsCounter, 549 mSDsluCounter, 519 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 567 SdHoareTripleChecker+Valid, 981 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-10 08:20:05,103 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [567 Valid, 981 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 257 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-10 08:20:05,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2727 states. [2022-01-10 08:20:05,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2727 to 2727. [2022-01-10 08:20:05,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2727 states, 2602 states have (on average 1.2056110684089163) internal successors, (3137), 2604 states have internal predecessors, (3137), 67 states have call successors, (67), 56 states have call predecessors, (67), 57 states have return successors, (68), 67 states have call predecessors, (68), 67 states have call successors, (68) [2022-01-10 08:20:05,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2727 states to 2727 states and 3272 transitions. [2022-01-10 08:20:05,355 INFO L78 Accepts]: Start accepts. Automaton has 2727 states and 3272 transitions. Word has length 167 [2022-01-10 08:20:05,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:20:05,356 INFO L470 AbstractCegarLoop]: Abstraction has 2727 states and 3272 transitions. [2022-01-10 08:20:05,356 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 31.4) internal successors, (157), 4 states have internal predecessors, (157), 2 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:20:05,356 INFO L276 IsEmpty]: Start isEmpty. Operand 2727 states and 3272 transitions. [2022-01-10 08:20:05,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-01-10 08:20:05,356 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:20:05,356 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:20:05,364 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (48)] Ended with exit code 0 [2022-01-10 08:20:05,565 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 08:20:05,565 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:20:05,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:20:05,565 INFO L85 PathProgramCache]: Analyzing trace with hash 2076620783, now seen corresponding path program 1 times [2022-01-10 08:20:05,565 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:20:05,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [500425045] [2022-01-10 08:20:05,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:20:05,566 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:20:05,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:20:05,567 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 08:20:05,568 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (49)] Waiting until timeout for monitored process [2022-01-10 08:20:05,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:20:05,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 411 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-10 08:20:05,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:20:06,016 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 08:20:06,016 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:20:06,016 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:20:06,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [500425045] [2022-01-10 08:20:06,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [500425045] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:20:06,017 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:20:06,017 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 08:20:06,017 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911693272] [2022-01-10 08:20:06,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:20:06,017 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:20:06,017 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:20:06,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:20:06,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:20:06,018 INFO L87 Difference]: Start difference. First operand 2727 states and 3272 transitions. Second operand has 5 states, 5 states have (on average 31.4) internal successors, (157), 4 states have internal predecessors, (157), 2 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:20:06,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:20:06,537 INFO L93 Difference]: Finished difference Result 5434 states and 6519 transitions. [2022-01-10 08:20:06,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 08:20:06,538 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 31.4) internal successors, (157), 4 states have internal predecessors, (157), 2 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 167 [2022-01-10 08:20:06,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:20:06,543 INFO L225 Difference]: With dead ends: 5434 [2022-01-10 08:20:06,543 INFO L226 Difference]: Without dead ends: 2727 [2022-01-10 08:20:06,546 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-10 08:20:06,547 INFO L933 BasicCegarLoop]: 459 mSDtfsCounter, 536 mSDsluCounter, 515 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 554 SdHoareTripleChecker+Valid, 974 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 08:20:06,547 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [554 Valid, 974 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 257 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 08:20:06,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2727 states. [2022-01-10 08:20:06,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2727 to 2727. [2022-01-10 08:20:06,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2727 states, 2602 states have (on average 1.2029208301306686) internal successors, (3130), 2604 states have internal predecessors, (3130), 67 states have call successors, (67), 56 states have call predecessors, (67), 57 states have return successors, (68), 67 states have call predecessors, (68), 67 states have call successors, (68) [2022-01-10 08:20:06,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2727 states to 2727 states and 3265 transitions. [2022-01-10 08:20:06,801 INFO L78 Accepts]: Start accepts. Automaton has 2727 states and 3265 transitions. Word has length 167 [2022-01-10 08:20:06,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:20:06,801 INFO L470 AbstractCegarLoop]: Abstraction has 2727 states and 3265 transitions. [2022-01-10 08:20:06,801 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 31.4) internal successors, (157), 4 states have internal predecessors, (157), 2 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:20:06,801 INFO L276 IsEmpty]: Start isEmpty. Operand 2727 states and 3265 transitions. [2022-01-10 08:20:06,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-01-10 08:20:06,802 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:20:06,802 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:20:06,810 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (49)] Forceful destruction successful, exit code 0 [2022-01-10 08:20:07,007 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 08:20:07,007 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:20:07,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:20:07,007 INFO L85 PathProgramCache]: Analyzing trace with hash 2004234225, now seen corresponding path program 1 times [2022-01-10 08:20:07,008 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:20:07,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1436215388] [2022-01-10 08:20:07,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:20:07,008 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:20:07,008 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:20:07,009 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 08:20:07,010 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (50)] Waiting until timeout for monitored process [2022-01-10 08:20:07,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:20:07,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-10 08:20:07,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:20:07,410 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 08:20:07,410 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:20:07,410 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:20:07,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1436215388] [2022-01-10 08:20:07,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1436215388] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:20:07,411 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:20:07,411 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 08:20:07,411 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721593766] [2022-01-10 08:20:07,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:20:07,411 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:20:07,411 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:20:07,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:20:07,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:20:07,411 INFO L87 Difference]: Start difference. First operand 2727 states and 3265 transitions. Second operand has 5 states, 5 states have (on average 31.4) internal successors, (157), 4 states have internal predecessors, (157), 2 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:20:08,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:20:08,027 INFO L93 Difference]: Finished difference Result 5690 states and 6847 transitions. [2022-01-10 08:20:08,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 08:20:08,028 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 31.4) internal successors, (157), 4 states have internal predecessors, (157), 2 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 167 [2022-01-10 08:20:08,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:20:08,034 INFO L225 Difference]: With dead ends: 5690 [2022-01-10 08:20:08,034 INFO L226 Difference]: Without dead ends: 2983 [2022-01-10 08:20:08,038 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-01-10 08:20:08,038 INFO L933 BasicCegarLoop]: 502 mSDtfsCounter, 664 mSDsluCounter, 510 mSDsCounter, 0 mSdLazyCounter, 416 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 682 SdHoareTripleChecker+Valid, 1012 SdHoareTripleChecker+Invalid, 453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 416 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-10 08:20:08,038 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [682 Valid, 1012 Invalid, 453 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 416 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-10 08:20:08,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2983 states. [2022-01-10 08:20:08,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2983 to 2899. [2022-01-10 08:20:08,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2899 states, 2772 states have (on average 1.1893939393939394) internal successors, (3297), 2774 states have internal predecessors, (3297), 67 states have call successors, (67), 58 states have call predecessors, (67), 59 states have return successors, (68), 67 states have call predecessors, (68), 67 states have call successors, (68) [2022-01-10 08:20:08,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2899 states to 2899 states and 3432 transitions. [2022-01-10 08:20:08,302 INFO L78 Accepts]: Start accepts. Automaton has 2899 states and 3432 transitions. Word has length 167 [2022-01-10 08:20:08,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:20:08,303 INFO L470 AbstractCegarLoop]: Abstraction has 2899 states and 3432 transitions. [2022-01-10 08:20:08,303 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 31.4) internal successors, (157), 4 states have internal predecessors, (157), 2 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:20:08,303 INFO L276 IsEmpty]: Start isEmpty. Operand 2899 states and 3432 transitions. [2022-01-10 08:20:08,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-01-10 08:20:08,303 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:20:08,303 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:20:08,312 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (50)] Forceful destruction successful, exit code 0 [2022-01-10 08:20:08,508 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 08:20:08,508 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:20:08,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:20:08,508 INFO L85 PathProgramCache]: Analyzing trace with hash 2144782835, now seen corresponding path program 1 times [2022-01-10 08:20:08,509 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:20:08,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1733379889] [2022-01-10 08:20:08,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:20:08,509 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:20:08,509 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:20:08,510 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 08:20:08,511 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (51)] Waiting until timeout for monitored process [2022-01-10 08:20:08,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:20:08,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 08:20:08,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:20:08,848 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 08:20:08,848 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:20:08,848 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:20:08,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1733379889] [2022-01-10 08:20:08,848 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1733379889] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:20:08,848 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:20:08,849 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 08:20:08,849 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946596124] [2022-01-10 08:20:08,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:20:08,849 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 08:20:08,849 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:20:08,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 08:20:08,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:20:08,849 INFO L87 Difference]: Start difference. First operand 2899 states and 3432 transitions. Second operand has 3 states, 3 states have (on average 52.333333333333336) internal successors, (157), 2 states have internal predecessors, (157), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-01-10 08:20:09,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:20:09,425 INFO L93 Difference]: Finished difference Result 8614 states and 10231 transitions. [2022-01-10 08:20:09,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 08:20:09,431 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 52.333333333333336) internal successors, (157), 2 states have internal predecessors, (157), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 167 [2022-01-10 08:20:09,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:20:09,441 INFO L225 Difference]: With dead ends: 8614 [2022-01-10 08:20:09,442 INFO L226 Difference]: Without dead ends: 5736 [2022-01-10 08:20:09,446 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:20:09,447 INFO L933 BasicCegarLoop]: 550 mSDtfsCounter, 309 mSDsluCounter, 441 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 309 SdHoareTripleChecker+Valid, 991 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 08:20:09,447 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [309 Valid, 991 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:20:09,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5736 states. [2022-01-10 08:20:10,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5736 to 5734. [2022-01-10 08:20:10,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5734 states, 5485 states have (on average 1.1830446672743846) internal successors, (6489), 5490 states have internal predecessors, (6489), 130 states have call successors, (130), 116 states have call predecessors, (130), 118 states have return successors, (132), 128 states have call predecessors, (132), 130 states have call successors, (132) [2022-01-10 08:20:10,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5734 states to 5734 states and 6751 transitions. [2022-01-10 08:20:10,028 INFO L78 Accepts]: Start accepts. Automaton has 5734 states and 6751 transitions. Word has length 167 [2022-01-10 08:20:10,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:20:10,028 INFO L470 AbstractCegarLoop]: Abstraction has 5734 states and 6751 transitions. [2022-01-10 08:20:10,028 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.333333333333336) internal successors, (157), 2 states have internal predecessors, (157), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-01-10 08:20:10,028 INFO L276 IsEmpty]: Start isEmpty. Operand 5734 states and 6751 transitions. [2022-01-10 08:20:10,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 273 [2022-01-10 08:20:10,032 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:20:10,033 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:20:10,048 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (51)] Ended with exit code 0 [2022-01-10 08:20:10,241 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 08:20:10,241 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:20:10,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:20:10,242 INFO L85 PathProgramCache]: Analyzing trace with hash -1348915442, now seen corresponding path program 1 times [2022-01-10 08:20:10,242 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:20:10,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [370491566] [2022-01-10 08:20:10,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:20:10,243 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:20:10,243 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:20:10,244 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 08:20:10,244 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (52)] Waiting until timeout for monitored process [2022-01-10 08:20:10,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:20:10,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 571 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 08:20:10,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:20:10,839 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-01-10 08:20:10,839 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:20:10,839 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:20:10,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [370491566] [2022-01-10 08:20:10,839 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [370491566] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:20:10,839 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:20:10,839 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 08:20:10,839 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885484008] [2022-01-10 08:20:10,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:20:10,840 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 08:20:10,840 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:20:10,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 08:20:10,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 08:20:10,840 INFO L87 Difference]: Start difference. First operand 5734 states and 6751 transitions. Second operand has 4 states, 4 states have (on average 45.75) internal successors, (183), 4 states have internal predecessors, (183), 4 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-01-10 08:20:12,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:20:12,095 INFO L93 Difference]: Finished difference Result 17026 states and 20018 transitions. [2022-01-10 08:20:12,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 08:20:12,096 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 45.75) internal successors, (183), 4 states have internal predecessors, (183), 4 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 272 [2022-01-10 08:20:12,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:20:12,119 INFO L225 Difference]: With dead ends: 17026 [2022-01-10 08:20:12,120 INFO L226 Difference]: Without dead ends: 11314 [2022-01-10 08:20:12,130 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 270 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 08:20:12,131 INFO L933 BasicCegarLoop]: 696 mSDtfsCounter, 634 mSDsluCounter, 845 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 640 SdHoareTripleChecker+Valid, 1541 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 08:20:12,131 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [640 Valid, 1541 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 08:20:12,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11314 states. [2022-01-10 08:20:13,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11314 to 11312. [2022-01-10 08:20:13,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11312 states, 10824 states have (on average 1.1784922394678492) internal successors, (12756), 10838 states have internal predecessors, (12756), 251 states have call successors, (251), 224 states have call predecessors, (251), 236 states have return successors, (275), 251 states have call predecessors, (275), 251 states have call successors, (275) [2022-01-10 08:20:13,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11312 states to 11312 states and 13282 transitions. [2022-01-10 08:20:13,206 INFO L78 Accepts]: Start accepts. Automaton has 11312 states and 13282 transitions. Word has length 272 [2022-01-10 08:20:13,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:20:13,206 INFO L470 AbstractCegarLoop]: Abstraction has 11312 states and 13282 transitions. [2022-01-10 08:20:13,206 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 45.75) internal successors, (183), 4 states have internal predecessors, (183), 4 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-01-10 08:20:13,206 INFO L276 IsEmpty]: Start isEmpty. Operand 11312 states and 13282 transitions. [2022-01-10 08:20:13,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 273 [2022-01-10 08:20:13,212 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:20:13,213 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:20:13,221 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (52)] Ended with exit code 0 [2022-01-10 08:20:13,421 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 08:20:13,421 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:20:13,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:20:13,421 INFO L85 PathProgramCache]: Analyzing trace with hash -1366202992, now seen corresponding path program 1 times [2022-01-10 08:20:13,422 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:20:13,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [101845585] [2022-01-10 08:20:13,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:20:13,422 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:20:13,422 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:20:13,423 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 08:20:13,424 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (53)] Waiting until timeout for monitored process [2022-01-10 08:20:13,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:20:13,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 571 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 08:20:13,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:20:13,874 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2022-01-10 08:20:13,874 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:20:13,874 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:20:13,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [101845585] [2022-01-10 08:20:13,874 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [101845585] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:20:13,874 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:20:13,874 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 08:20:13,875 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288845490] [2022-01-10 08:20:13,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:20:13,875 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 08:20:13,875 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:20:13,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 08:20:13,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:20:13,875 INFO L87 Difference]: Start difference. First operand 11312 states and 13282 transitions. Second operand has 3 states, 3 states have (on average 58.0) internal successors, (174), 3 states have internal predecessors, (174), 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 08:20:15,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:20:15,016 INFO L93 Difference]: Finished difference Result 22588 states and 26503 transitions. [2022-01-10 08:20:15,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 08:20:15,016 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 58.0) internal successors, (174), 3 states have internal predecessors, (174), 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 272 [2022-01-10 08:20:15,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:20:15,037 INFO L225 Difference]: With dead ends: 22588 [2022-01-10 08:20:15,037 INFO L226 Difference]: Without dead ends: 11298 [2022-01-10 08:20:15,051 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 270 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:20:15,052 INFO L933 BasicCegarLoop]: 482 mSDtfsCounter, 474 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 474 SdHoareTripleChecker+Valid, 483 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 08:20:15,052 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [474 Valid, 483 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:20:15,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11298 states. [2022-01-10 08:20:16,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11298 to 11298. [2022-01-10 08:20:16,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11298 states, 10813 states have (on average 1.1778414870988625) internal successors, (12736), 10826 states have internal predecessors, (12736), 248 states have call successors, (248), 224 states have call predecessors, (248), 236 states have return successors, (272), 248 states have call predecessors, (272), 248 states have call successors, (272) [2022-01-10 08:20:16,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11298 states to 11298 states and 13256 transitions. [2022-01-10 08:20:16,166 INFO L78 Accepts]: Start accepts. Automaton has 11298 states and 13256 transitions. Word has length 272 [2022-01-10 08:20:16,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:20:16,166 INFO L470 AbstractCegarLoop]: Abstraction has 11298 states and 13256 transitions. [2022-01-10 08:20:16,167 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 58.0) internal successors, (174), 3 states have internal predecessors, (174), 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 08:20:16,167 INFO L276 IsEmpty]: Start isEmpty. Operand 11298 states and 13256 transitions. [2022-01-10 08:20:16,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 274 [2022-01-10 08:20:16,173 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:20:16,173 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:20:16,195 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (53)] Forceful destruction successful, exit code 0 [2022-01-10 08:20:16,382 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 08:20:16,382 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:20:16,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:20:16,383 INFO L85 PathProgramCache]: Analyzing trace with hash 873795887, now seen corresponding path program 1 times [2022-01-10 08:20:16,383 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:20:16,383 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1207652959] [2022-01-10 08:20:16,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:20:16,384 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:20:16,384 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:20:16,385 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 08:20:16,406 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (54)] Waiting until timeout for monitored process [2022-01-10 08:20:16,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:20:16,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 573 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 08:20:16,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:20:17,022 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-01-10 08:20:17,023 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:20:17,023 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:20:17,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1207652959] [2022-01-10 08:20:17,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1207652959] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:20:17,023 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:20:17,023 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 08:20:17,023 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366732648] [2022-01-10 08:20:17,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:20:17,023 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 08:20:17,023 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:20:17,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 08:20:17,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 08:20:17,024 INFO L87 Difference]: Start difference. First operand 11298 states and 13256 transitions. Second operand has 4 states, 4 states have (on average 46.0) internal successors, (184), 4 states have internal predecessors, (184), 4 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-01-10 08:20:19,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:20:19,454 INFO L93 Difference]: Finished difference Result 33291 states and 39037 transitions. [2022-01-10 08:20:19,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 08:20:19,455 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 46.0) internal successors, (184), 4 states have internal predecessors, (184), 4 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 273 [2022-01-10 08:20:19,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:20:19,497 INFO L225 Difference]: With dead ends: 33291 [2022-01-10 08:20:19,497 INFO L226 Difference]: Without dead ends: 22015 [2022-01-10 08:20:19,512 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 271 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 08:20:19,513 INFO L933 BasicCegarLoop]: 679 mSDtfsCounter, 629 mSDsluCounter, 822 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 635 SdHoareTripleChecker+Valid, 1501 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 08:20:19,513 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [635 Valid, 1501 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 08:20:19,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22015 states. [2022-01-10 08:20:21,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22015 to 22013. [2022-01-10 08:20:21,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22013 states, 21069 states have (on average 1.1754236081446676) internal successors, (24765), 21099 states have internal predecessors, (24765), 479 states have call successors, (479), 432 states have call predecessors, (479), 464 states have return successors, (547), 483 states have call predecessors, (547), 479 states have call successors, (547) [2022-01-10 08:20:21,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22013 states to 22013 states and 25791 transitions. [2022-01-10 08:20:21,812 INFO L78 Accepts]: Start accepts. Automaton has 22013 states and 25791 transitions. Word has length 273 [2022-01-10 08:20:21,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:20:21,812 INFO L470 AbstractCegarLoop]: Abstraction has 22013 states and 25791 transitions. [2022-01-10 08:20:21,812 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 46.0) internal successors, (184), 4 states have internal predecessors, (184), 4 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-01-10 08:20:21,813 INFO L276 IsEmpty]: Start isEmpty. Operand 22013 states and 25791 transitions. [2022-01-10 08:20:21,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 274 [2022-01-10 08:20:21,824 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:20:21,824 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:20:21,839 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (54)] Forceful destruction successful, exit code 0 [2022-01-10 08:20:22,035 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 08:20:22,036 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:20:22,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:20:22,036 INFO L85 PathProgramCache]: Analyzing trace with hash 856508337, now seen corresponding path program 1 times [2022-01-10 08:20:22,037 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:20:22,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [757518709] [2022-01-10 08:20:22,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:20:22,037 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:20:22,037 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:20:22,051 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 08:20:22,052 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (55)] Waiting until timeout for monitored process [2022-01-10 08:20:22,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:20:22,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 573 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 08:20:22,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:20:22,599 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2022-01-10 08:20:22,599 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:20:22,600 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:20:22,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [757518709] [2022-01-10 08:20:22,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [757518709] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:20:22,600 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:20:22,600 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 08:20:22,600 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282006710] [2022-01-10 08:20:22,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:20:22,601 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 08:20:22,601 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:20:22,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 08:20:22,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:20:22,601 INFO L87 Difference]: Start difference. First operand 22013 states and 25791 transitions. Second operand has 3 states, 3 states have (on average 58.333333333333336) internal successors, (175), 3 states have internal predecessors, (175), 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 08:20:25,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:20:25,099 INFO L93 Difference]: Finished difference Result 43991 states and 51524 transitions. [2022-01-10 08:20:25,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 08:20:25,099 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 58.333333333333336) internal successors, (175), 3 states have internal predecessors, (175), 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 273 [2022-01-10 08:20:25,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:20:25,137 INFO L225 Difference]: With dead ends: 43991 [2022-01-10 08:20:25,137 INFO L226 Difference]: Without dead ends: 22000 [2022-01-10 08:20:25,158 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 271 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:20:25,158 INFO L933 BasicCegarLoop]: 481 mSDtfsCounter, 472 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 472 SdHoareTripleChecker+Valid, 482 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 08:20:25,158 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [472 Valid, 482 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:20:25,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22000 states. [2022-01-10 08:20:27,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22000 to 22000. [2022-01-10 08:20:27,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22000 states, 21059 states have (on average 1.1751270240752172) internal successors, (24747), 21088 states have internal predecessors, (24747), 476 states have call successors, (476), 432 states have call predecessors, (476), 464 states have return successors, (544), 480 states have call predecessors, (544), 476 states have call successors, (544) [2022-01-10 08:20:27,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22000 states to 22000 states and 25767 transitions. [2022-01-10 08:20:27,443 INFO L78 Accepts]: Start accepts. Automaton has 22000 states and 25767 transitions. Word has length 273 [2022-01-10 08:20:27,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:20:27,447 INFO L470 AbstractCegarLoop]: Abstraction has 22000 states and 25767 transitions. [2022-01-10 08:20:27,448 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 58.333333333333336) internal successors, (175), 3 states have internal predecessors, (175), 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 08:20:27,448 INFO L276 IsEmpty]: Start isEmpty. Operand 22000 states and 25767 transitions. [2022-01-10 08:20:27,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 275 [2022-01-10 08:20:27,459 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:20:27,459 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:20:27,479 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (55)] Ended with exit code 0 [2022-01-10 08:20:27,668 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 08:20:27,668 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:20:27,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:20:27,668 INFO L85 PathProgramCache]: Analyzing trace with hash 1098796714, now seen corresponding path program 1 times [2022-01-10 08:20:27,669 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:20:27,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1300431837] [2022-01-10 08:20:27,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:20:27,669 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:20:27,669 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:20:27,684 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 08:20:27,691 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (56)] Waiting until timeout for monitored process [2022-01-10 08:20:27,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:20:27,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 575 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 08:20:27,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:20:28,321 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-01-10 08:20:28,321 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:20:28,321 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:20:28,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1300431837] [2022-01-10 08:20:28,322 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1300431837] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:20:28,322 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:20:28,322 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 08:20:28,322 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238241164] [2022-01-10 08:20:28,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:20:28,322 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 08:20:28,322 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:20:28,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 08:20:28,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 08:20:28,323 INFO L87 Difference]: Start difference. First operand 22000 states and 25767 transitions. Second operand has 4 states, 4 states have (on average 46.25) internal successors, (185), 4 states have internal predecessors, (185), 4 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-01-10 08:20:33,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:20:33,129 INFO L93 Difference]: Finished difference Result 64796 states and 75857 transitions. [2022-01-10 08:20:33,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 08:20:33,129 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 46.25) internal successors, (185), 4 states have internal predecessors, (185), 4 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 274 [2022-01-10 08:20:33,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:20:33,212 INFO L225 Difference]: With dead ends: 64796 [2022-01-10 08:20:33,212 INFO L226 Difference]: Without dead ends: 42818 [2022-01-10 08:20:33,237 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 272 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 08:20:33,238 INFO L933 BasicCegarLoop]: 479 mSDtfsCounter, 644 mSDsluCounter, 631 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 650 SdHoareTripleChecker+Valid, 1110 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 08:20:33,238 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [650 Valid, 1110 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 08:20:33,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42818 states. [2022-01-10 08:20:37,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42818 to 42816. [2022-01-10 08:20:37,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42816 states, 40987 states have (on average 1.1734208407543856) internal successors, (48095), 41052 states have internal predecessors, (48095), 916 states have call successors, (916), 832 states have call predecessors, (916), 912 states have return successors, (1080), 932 states have call predecessors, (1080), 916 states have call successors, (1080) [2022-01-10 08:20:37,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42816 states to 42816 states and 50091 transitions. [2022-01-10 08:20:37,837 INFO L78 Accepts]: Start accepts. Automaton has 42816 states and 50091 transitions. Word has length 274 [2022-01-10 08:20:37,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:20:37,838 INFO L470 AbstractCegarLoop]: Abstraction has 42816 states and 50091 transitions. [2022-01-10 08:20:37,838 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 46.25) internal successors, (185), 4 states have internal predecessors, (185), 4 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-01-10 08:20:37,838 INFO L276 IsEmpty]: Start isEmpty. Operand 42816 states and 50091 transitions. [2022-01-10 08:20:37,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 276 [2022-01-10 08:20:37,856 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:20:37,856 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:20:37,865 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (56)] Forceful destruction successful, exit code 0