/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.07.cil-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 08:18:30,058 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 08:18:30,060 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 08:18:30,078 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-10 08:18:30,079 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-10 08:18:30,080 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-10 08:18:30,080 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-10 08:18:30,082 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-10 08:18:30,083 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-10 08:18:30,083 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-10 08:18:30,084 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-10 08:18:30,085 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-10 08:18:30,085 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-10 08:18:30,086 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-10 08:18:30,086 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-10 08:18:30,087 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-10 08:18:30,088 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-10 08:18:30,088 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-10 08:18:30,089 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-10 08:18:30,090 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-10 08:18:30,091 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-10 08:18:30,092 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-10 08:18:30,093 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-10 08:18:30,094 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-10 08:18:30,095 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-10 08:18:30,101 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-10 08:18:30,101 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-10 08:18:30,102 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-10 08:18:30,109 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 08:18:30,149 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 08:18:30,150 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 08:18:30,150 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 08:18:30,150 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 08:18:30,151 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-10 08:18:30,151 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-10 08:18:30,151 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 08:18:30,152 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 08:18:30,152 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 08:18:30,152 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 08:18:30,152 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 08:18:30,152 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 08:18:30,153 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 08:18:30,153 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 08:18:30,153 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 08:18:30,153 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 08:18:30,153 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 08:18:30,153 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 08:18:30,153 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 08:18:30,153 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 08:18:30,153 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 08:18:30,153 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 08:18:30,153 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 08:18:30,153 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 08:18:30,154 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 08:18:30,154 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 08:18:30,154 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 08:18:30,154 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-01-10 08:18:30,154 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-01-10 08:18:30,154 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 08:18:30,154 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 08:18:30,154 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 08:18:30,154 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 08:18:30,154 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 08:18:30,352 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 08:18:30,373 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 08:18:30,375 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 08:18:30,376 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 08:18:30,376 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 08:18:30,377 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/combinations/pc_sfifo_1.cil-2+token_ring.07.cil-2.c [2022-01-10 08:18:30,435 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/af4e6db6b/8d24cdaee0374c049262cc291c3413bc/FLAG375bac611 [2022-01-10 08:18:30,805 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 08:18:30,806 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/combinations/pc_sfifo_1.cil-2+token_ring.07.cil-2.c [2022-01-10 08:18:30,823 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/af4e6db6b/8d24cdaee0374c049262cc291c3413bc/FLAG375bac611 [2022-01-10 08:18:31,190 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/af4e6db6b/8d24cdaee0374c049262cc291c3413bc [2022-01-10 08:18:31,192 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 08:18:31,193 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-10 08:18:31,195 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 08:18:31,196 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 08:18:31,198 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 08:18:31,199 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 08:18:31" (1/1) ... [2022-01-10 08:18:31,200 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7e5cd5d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:18:31, skipping insertion in model container [2022-01-10 08:18:31,200 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 08:18:31" (1/1) ... [2022-01-10 08:18:31,204 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 08:18:31,229 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 08:18:31,382 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.07.cil-2.c[913,926] [2022-01-10 08:18:31,434 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.07.cil-2.c[5977,5990] [2022-01-10 08:18:31,504 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 08:18:31,512 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 08:18:31,522 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.07.cil-2.c[913,926] [2022-01-10 08:18:31,529 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.07.cil-2.c[5977,5990] [2022-01-10 08:18:31,570 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 08:18:31,588 INFO L208 MainTranslator]: Completed translation [2022-01-10 08:18:31,588 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:18:31 WrapperNode [2022-01-10 08:18:31,588 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 08:18:31,589 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 08:18:31,589 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 08:18:31,589 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 08:18:31,601 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:18:31" (1/1) ... [2022-01-10 08:18:31,611 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:18:31" (1/1) ... [2022-01-10 08:18:31,641 INFO L137 Inliner]: procedures = 63, calls = 70, calls flagged for inlining = 36, calls inlined = 36, statements flattened = 738 [2022-01-10 08:18:31,641 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 08:18:31,641 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 08:18:31,642 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 08:18:31,642 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 08:18:31,652 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:18:31" (1/1) ... [2022-01-10 08:18:31,652 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:18:31" (1/1) ... [2022-01-10 08:18:31,656 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:18:31" (1/1) ... [2022-01-10 08:18:31,657 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:18:31" (1/1) ... [2022-01-10 08:18:31,664 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:18:31" (1/1) ... [2022-01-10 08:18:31,682 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:18:31" (1/1) ... [2022-01-10 08:18:31,684 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:18:31" (1/1) ... [2022-01-10 08:18:31,688 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 08:18:31,689 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 08:18:31,689 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 08:18:31,689 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 08:18:31,690 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:18:31" (1/1) ... [2022-01-10 08:18:31,695 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 08:18:31,716 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 08:18:31,729 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 08:18:31,735 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 08:18:31,755 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 08:18:31,755 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-01-10 08:18:31,755 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-01-10 08:18:31,755 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify_threads [2022-01-10 08:18:31,755 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify_threads [2022-01-10 08:18:31,756 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2022-01-10 08:18:31,756 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2022-01-10 08:18:31,756 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2022-01-10 08:18:31,757 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2022-01-10 08:18:31,757 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2022-01-10 08:18:31,757 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2022-01-10 08:18:31,757 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2022-01-10 08:18:31,757 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2022-01-10 08:18:31,757 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 08:18:31,757 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2022-01-10 08:18:31,757 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2022-01-10 08:18:31,757 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2022-01-10 08:18:31,757 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2022-01-10 08:18:31,757 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 08:18:31,758 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 08:18:31,758 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2022-01-10 08:18:31,758 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2022-01-10 08:18:31,758 INFO L130 BoogieDeclarations]: Found specification of procedure error2 [2022-01-10 08:18:31,758 INFO L138 BoogieDeclarations]: Found implementation of procedure error2 [2022-01-10 08:18:31,899 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 08:18:31,900 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 08:18:32,404 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 08:18:32,411 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 08:18:32,412 INFO L299 CfgBuilder]: Removed 14 assume(true) statements. [2022-01-10 08:18:32,413 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 08:18:32 BoogieIcfgContainer [2022-01-10 08:18:32,413 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 08:18:32,414 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 08:18:32,414 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 08:18:32,419 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 08:18:32,419 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 08:18:31" (1/3) ... [2022-01-10 08:18:32,419 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52e3d6dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 08:18:32, skipping insertion in model container [2022-01-10 08:18:32,419 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:18:31" (2/3) ... [2022-01-10 08:18:32,419 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52e3d6dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 08:18:32, skipping insertion in model container [2022-01-10 08:18:32,420 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 08:18:32" (3/3) ... [2022-01-10 08:18:32,420 INFO L111 eAbstractionObserver]: Analyzing ICFG pc_sfifo_1.cil-2+token_ring.07.cil-2.c [2022-01-10 08:18:32,423 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 08:18:32,423 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-01-10 08:18:32,460 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 08:18:32,464 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 08:18:32,464 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-01-10 08:18:32,479 INFO L276 IsEmpty]: Start isEmpty. Operand has 337 states, 295 states have (on average 1.6305084745762712) internal successors, (481), 302 states have internal predecessors, (481), 29 states have call successors, (29), 10 states have call predecessors, (29), 10 states have return successors, (29), 27 states have call predecessors, (29), 29 states have call successors, (29) [2022-01-10 08:18:32,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-01-10 08:18:32,488 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:18:32,488 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 08:18:32,489 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:18:32,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:18:32,492 INFO L85 PathProgramCache]: Analyzing trace with hash -1847499811, now seen corresponding path program 1 times [2022-01-10 08:18:32,501 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:18:32,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [470361988] [2022-01-10 08:18:32,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:18:32,502 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:18:32,503 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:18:32,504 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 08:18:32,539 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 08:18:32,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:18:32,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 08:18:32,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:18:32,735 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 08:18:32,735 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:18:32,736 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:18:32,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [470361988] [2022-01-10 08:18:32,736 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [470361988] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:18:32,736 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:18:32,737 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 08:18:32,739 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710884947] [2022-01-10 08:18:32,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:18:32,743 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 08:18:32,743 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:18:32,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 08:18:32,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:18:32,769 INFO L87 Difference]: Start difference. First operand has 337 states, 295 states have (on average 1.6305084745762712) internal successors, (481), 302 states have internal predecessors, (481), 29 states have call successors, (29), 10 states have call predecessors, (29), 10 states have return successors, (29), 27 states have call predecessors, (29), 29 states have call successors, (29) 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 08:18:32,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:18:32,868 INFO L93 Difference]: Finished difference Result 712 states and 1140 transitions. [2022-01-10 08:18:32,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 08:18:32,870 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 08:18:32,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:18:32,880 INFO L225 Difference]: With dead ends: 712 [2022-01-10 08:18:32,880 INFO L226 Difference]: Without dead ends: 385 [2022-01-10 08:18:32,884 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 08:18:32,887 INFO L933 BasicCegarLoop]: 534 mSDtfsCounter, 485 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 485 SdHoareTripleChecker+Valid, 619 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 08:18:32,887 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [485 Valid, 619 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:18:32,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2022-01-10 08:18:32,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 381. [2022-01-10 08:18:32,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 381 states, 336 states have (on average 1.5089285714285714) internal successors, (507), 340 states have internal predecessors, (507), 33 states have call successors, (33), 12 states have call predecessors, (33), 10 states have return successors, (33), 29 states have call predecessors, (33), 29 states have call successors, (33) [2022-01-10 08:18:32,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 381 states to 381 states and 573 transitions. [2022-01-10 08:18:32,954 INFO L78 Accepts]: Start accepts. Automaton has 381 states and 573 transitions. Word has length 44 [2022-01-10 08:18:32,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:18:32,955 INFO L470 AbstractCegarLoop]: Abstraction has 381 states and 573 transitions. [2022-01-10 08:18:32,955 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 08:18:32,956 INFO L276 IsEmpty]: Start isEmpty. Operand 381 states and 573 transitions. [2022-01-10 08:18:32,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-01-10 08:18:32,961 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:18:32,961 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 08:18:32,968 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 08:18:33,168 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 08:18:33,169 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:18:33,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:18:33,169 INFO L85 PathProgramCache]: Analyzing trace with hash 2047693479, now seen corresponding path program 1 times [2022-01-10 08:18:33,170 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:18:33,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1671898405] [2022-01-10 08:18:33,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:18:33,170 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:18:33,170 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:18:33,172 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 08:18:33,191 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 08:18:33,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:18:33,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 08:18:33,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:18:33,348 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 08:18:33,348 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:18:33,349 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:18:33,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1671898405] [2022-01-10 08:18:33,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1671898405] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:18:33,352 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:18:33,353 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 08:18:33,353 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252128849] [2022-01-10 08:18:33,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:18:33,357 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 08:18:33,357 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:18:33,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 08:18:33,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:18:33,361 INFO L87 Difference]: Start difference. First operand 381 states and 573 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 08:18:33,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:18:33,395 INFO L93 Difference]: Finished difference Result 589 states and 861 transitions. [2022-01-10 08:18:33,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 08:18:33,396 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 08:18:33,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:18:33,402 INFO L225 Difference]: With dead ends: 589 [2022-01-10 08:18:33,402 INFO L226 Difference]: Without dead ends: 474 [2022-01-10 08:18:33,404 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 08:18:33,405 INFO L933 BasicCegarLoop]: 522 mSDtfsCounter, 62 mSDsluCounter, 470 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 992 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 08:18:33,406 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 992 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:18:33,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2022-01-10 08:18:33,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 448. [2022-01-10 08:18:33,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 448 states, 397 states have (on average 1.4886649874055415) internal successors, (591), 401 states have internal predecessors, (591), 36 states have call successors, (36), 15 states have call predecessors, (36), 13 states have return successors, (37), 32 states have call predecessors, (37), 32 states have call successors, (37) [2022-01-10 08:18:33,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 448 states to 448 states and 664 transitions. [2022-01-10 08:18:33,452 INFO L78 Accepts]: Start accepts. Automaton has 448 states and 664 transitions. Word has length 45 [2022-01-10 08:18:33,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:18:33,452 INFO L470 AbstractCegarLoop]: Abstraction has 448 states and 664 transitions. [2022-01-10 08:18:33,452 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 08:18:33,452 INFO L276 IsEmpty]: Start isEmpty. Operand 448 states and 664 transitions. [2022-01-10 08:18:33,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-01-10 08:18:33,456 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:18:33,456 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 08:18:33,463 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2022-01-10 08:18:33,659 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 08:18:33,660 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:18:33,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:18:33,661 INFO L85 PathProgramCache]: Analyzing trace with hash 763336018, now seen corresponding path program 1 times [2022-01-10 08:18:33,661 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:18:33,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1233868472] [2022-01-10 08:18:33,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:18:33,662 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:18:33,662 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:18:33,668 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 08:18:33,669 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 08:18:33,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:18:33,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 08:18:33,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:18:33,804 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 08:18:33,804 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:18:33,804 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:18:33,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1233868472] [2022-01-10 08:18:33,806 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1233868472] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:18:33,806 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:18:33,806 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 08:18:33,808 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168886714] [2022-01-10 08:18:33,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:18:33,808 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 08:18:33,809 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:18:33,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 08:18:33,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:18:33,809 INFO L87 Difference]: Start difference. First operand 448 states and 664 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 08:18:33,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:18:33,837 INFO L93 Difference]: Finished difference Result 801 states and 1152 transitions. [2022-01-10 08:18:33,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 08:18:33,838 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 08:18:33,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:18:33,843 INFO L225 Difference]: With dead ends: 801 [2022-01-10 08:18:33,843 INFO L226 Difference]: Without dead ends: 619 [2022-01-10 08:18:33,845 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 08:18:33,846 INFO L933 BasicCegarLoop]: 507 mSDtfsCounter, 465 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 465 SdHoareTripleChecker+Valid, 585 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 08:18:33,848 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [465 Valid, 585 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:18:33,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 619 states. [2022-01-10 08:18:33,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 619 to 605. [2022-01-10 08:18:33,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 605 states, 536 states have (on average 1.4421641791044777) internal successors, (773), 542 states have internal predecessors, (773), 47 states have call successors, (47), 22 states have call predecessors, (47), 20 states have return successors, (53), 41 states have call predecessors, (53), 43 states have call successors, (53) [2022-01-10 08:18:33,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 605 states to 605 states and 873 transitions. [2022-01-10 08:18:33,875 INFO L78 Accepts]: Start accepts. Automaton has 605 states and 873 transitions. Word has length 45 [2022-01-10 08:18:33,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:18:33,876 INFO L470 AbstractCegarLoop]: Abstraction has 605 states and 873 transitions. [2022-01-10 08:18:33,876 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 08:18:33,876 INFO L276 IsEmpty]: Start isEmpty. Operand 605 states and 873 transitions. [2022-01-10 08:18:33,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-01-10 08:18:33,877 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:18:33,877 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 08:18:33,888 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 08:18:34,088 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 08:18:34,089 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:18:34,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:18:34,089 INFO L85 PathProgramCache]: Analyzing trace with hash 313583757, now seen corresponding path program 1 times [2022-01-10 08:18:34,089 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:18:34,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2113304705] [2022-01-10 08:18:34,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:18:34,090 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:18:34,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:18:34,091 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 08:18:34,092 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 08:18:34,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:18:34,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 08:18:34,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:18:34,245 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 08:18:34,246 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:18:34,246 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:18:34,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2113304705] [2022-01-10 08:18:34,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2113304705] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:18:34,246 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:18:34,246 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 08:18:34,246 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048125515] [2022-01-10 08:18:34,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:18:34,247 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 08:18:34,247 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:18:34,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 08:18:34,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:18:34,248 INFO L87 Difference]: Start difference. First operand 605 states and 873 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 08:18:34,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:18:34,285 INFO L93 Difference]: Finished difference Result 1117 states and 1570 transitions. [2022-01-10 08:18:34,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 08:18:34,285 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 08:18:34,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:18:34,290 INFO L225 Difference]: With dead ends: 1117 [2022-01-10 08:18:34,291 INFO L226 Difference]: Without dead ends: 778 [2022-01-10 08:18:34,293 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 08:18:34,294 INFO L933 BasicCegarLoop]: 553 mSDtfsCounter, 50 mSDsluCounter, 485 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 1038 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 08:18:34,294 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 1038 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:18:34,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 778 states. [2022-01-10 08:18:34,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 778 to 778. [2022-01-10 08:18:34,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 778 states, 687 states have (on average 1.388646288209607) internal successors, (954), 693 states have internal predecessors, (954), 61 states have call successors, (61), 30 states have call predecessors, (61), 28 states have return successors, (75), 55 states have call predecessors, (75), 57 states have call successors, (75) [2022-01-10 08:18:34,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 778 states to 778 states and 1090 transitions. [2022-01-10 08:18:34,316 INFO L78 Accepts]: Start accepts. Automaton has 778 states and 1090 transitions. Word has length 62 [2022-01-10 08:18:34,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:18:34,316 INFO L470 AbstractCegarLoop]: Abstraction has 778 states and 1090 transitions. [2022-01-10 08:18:34,316 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 08:18:34,316 INFO L276 IsEmpty]: Start isEmpty. Operand 778 states and 1090 transitions. [2022-01-10 08:18:34,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-01-10 08:18:34,317 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:18:34,317 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 08:18:34,326 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-01-10 08:18:34,523 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 08:18:34,523 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:18:34,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:18:34,524 INFO L85 PathProgramCache]: Analyzing trace with hash 37906234, now seen corresponding path program 1 times [2022-01-10 08:18:34,524 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:18:34,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [417094370] [2022-01-10 08:18:34,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:18:34,524 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:18:34,525 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:18:34,525 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 08:18:34,526 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 08:18:34,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:18:34,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 08:18:34,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:18:34,701 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 08:18:34,701 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:18:34,701 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:18:34,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [417094370] [2022-01-10 08:18:34,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [417094370] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:18:34,702 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:18:34,702 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 08:18:34,702 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756848450] [2022-01-10 08:18:34,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:18:34,702 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 08:18:34,702 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:18:34,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 08:18:34,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:18:34,707 INFO L87 Difference]: Start difference. First operand 778 states and 1090 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 08:18:34,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:18:34,753 INFO L93 Difference]: Finished difference Result 1325 states and 1811 transitions. [2022-01-10 08:18:34,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 08:18:34,754 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 08:18:34,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:18:34,757 INFO L225 Difference]: With dead ends: 1325 [2022-01-10 08:18:34,757 INFO L226 Difference]: Without dead ends: 905 [2022-01-10 08:18:34,758 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 08:18:34,758 INFO L933 BasicCegarLoop]: 502 mSDtfsCounter, 452 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 452 SdHoareTripleChecker+Valid, 580 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 08:18:34,758 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [452 Valid, 580 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:18:34,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 905 states. [2022-01-10 08:18:34,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 905 to 905. [2022-01-10 08:18:34,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 905 states, 800 states have (on average 1.3575) internal successors, (1086), 806 states have internal predecessors, (1086), 69 states have call successors, (69), 36 states have call predecessors, (69), 34 states have return successors, (87), 63 states have call predecessors, (87), 65 states have call successors, (87) [2022-01-10 08:18:34,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 905 states to 905 states and 1242 transitions. [2022-01-10 08:18:34,783 INFO L78 Accepts]: Start accepts. Automaton has 905 states and 1242 transitions. Word has length 67 [2022-01-10 08:18:34,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:18:34,783 INFO L470 AbstractCegarLoop]: Abstraction has 905 states and 1242 transitions. [2022-01-10 08:18:34,783 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 08:18:34,783 INFO L276 IsEmpty]: Start isEmpty. Operand 905 states and 1242 transitions. [2022-01-10 08:18:34,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-01-10 08:18:34,784 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:18:34,784 INFO L514 BasicCegarLoop]: trace histogram [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] [2022-01-10 08:18:34,793 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 08:18:34,993 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 08:18:34,993 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:18:34,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:18:34,993 INFO L85 PathProgramCache]: Analyzing trace with hash -2022374513, now seen corresponding path program 1 times [2022-01-10 08:18:34,994 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:18:34,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [395391106] [2022-01-10 08:18:34,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:18:34,994 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:18:34,994 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:18:34,995 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 08:18:35,007 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 08:18:35,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:18:35,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:18:35,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:18:35,171 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-10 08:18:35,172 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:18:35,172 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:18:35,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [395391106] [2022-01-10 08:18:35,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [395391106] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:18:35,172 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:18:35,172 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 08:18:35,172 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737537286] [2022-01-10 08:18:35,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:18:35,173 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:18:35,173 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:18:35,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:18:35,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:18:35,173 INFO L87 Difference]: Start difference. First operand 905 states and 1242 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 08:18:35,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:18:35,222 INFO L93 Difference]: Finished difference Result 1353 states and 1839 transitions. [2022-01-10 08:18:35,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 08:18:35,223 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 08:18:35,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:18:35,226 INFO L225 Difference]: With dead ends: 1353 [2022-01-10 08:18:35,226 INFO L226 Difference]: Without dead ends: 812 [2022-01-10 08:18:35,227 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 08:18:35,228 INFO L933 BasicCegarLoop]: 492 mSDtfsCounter, 10 mSDsluCounter, 1475 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 1967 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 08:18:35,228 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 1967 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:18:35,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 812 states. [2022-01-10 08:18:35,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 812 to 796. [2022-01-10 08:18:35,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 796 states, 705 states have (on average 1.3631205673758866) internal successors, (961), 713 states have internal predecessors, (961), 59 states have call successors, (59), 30 states have call predecessors, (59), 30 states have return successors, (73), 53 states have call predecessors, (73), 55 states have call successors, (73) [2022-01-10 08:18:35,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 796 states to 796 states and 1093 transitions. [2022-01-10 08:18:35,254 INFO L78 Accepts]: Start accepts. Automaton has 796 states and 1093 transitions. Word has length 68 [2022-01-10 08:18:35,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:18:35,254 INFO L470 AbstractCegarLoop]: Abstraction has 796 states and 1093 transitions. [2022-01-10 08:18:35,254 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 08:18:35,254 INFO L276 IsEmpty]: Start isEmpty. Operand 796 states and 1093 transitions. [2022-01-10 08:18:35,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-01-10 08:18:35,255 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:18:35,256 INFO L514 BasicCegarLoop]: trace histogram [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] [2022-01-10 08:18:35,264 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-01-10 08:18:35,462 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 08:18:35,463 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:18:35,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:18:35,463 INFO L85 PathProgramCache]: Analyzing trace with hash 27392463, now seen corresponding path program 1 times [2022-01-10 08:18:35,463 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:18:35,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1926174164] [2022-01-10 08:18:35,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:18:35,464 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:18:35,464 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:18:35,465 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 08:18:35,466 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 08:18:35,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:18:35,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 08:18:35,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:18:35,630 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-10 08:18:35,630 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:18:35,631 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:18:35,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1926174164] [2022-01-10 08:18:35,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1926174164] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:18:35,631 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:18:35,631 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 08:18:35,631 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775155455] [2022-01-10 08:18:35,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:18:35,631 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 08:18:35,631 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:18:35,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 08:18:35,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:18:35,632 INFO L87 Difference]: Start difference. First operand 796 states and 1093 transitions. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (4), 3 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 08:18:35,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:18:35,663 INFO L93 Difference]: Finished difference Result 1226 states and 1659 transitions. [2022-01-10 08:18:35,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 08:18:35,664 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (4), 3 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 08:18:35,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:18:35,666 INFO L225 Difference]: With dead ends: 1226 [2022-01-10 08:18:35,666 INFO L226 Difference]: Without dead ends: 794 [2022-01-10 08:18:35,667 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 66 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 08:18:35,668 INFO L933 BasicCegarLoop]: 544 mSDtfsCounter, 72 mSDsluCounter, 466 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 1010 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 08:18:35,668 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 1010 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:18:35,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 794 states. [2022-01-10 08:18:35,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 794 to 750. [2022-01-10 08:18:35,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 750 states, 665 states have (on average 1.3518796992481203) internal successors, (899), 673 states have internal predecessors, (899), 55 states have call successors, (55), 28 states have call predecessors, (55), 28 states have return successors, (67), 49 states have call predecessors, (67), 51 states have call successors, (67) [2022-01-10 08:18:35,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 750 states to 750 states and 1021 transitions. [2022-01-10 08:18:35,685 INFO L78 Accepts]: Start accepts. Automaton has 750 states and 1021 transitions. Word has length 68 [2022-01-10 08:18:35,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:18:35,686 INFO L470 AbstractCegarLoop]: Abstraction has 750 states and 1021 transitions. [2022-01-10 08:18:35,686 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (4), 3 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 08:18:35,686 INFO L276 IsEmpty]: Start isEmpty. Operand 750 states and 1021 transitions. [2022-01-10 08:18:35,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-01-10 08:18:35,687 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:18:35,687 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 08:18:35,697 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 08:18:35,893 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 08:18:35,894 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:18:35,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:18:35,895 INFO L85 PathProgramCache]: Analyzing trace with hash -2087603058, now seen corresponding path program 1 times [2022-01-10 08:18:35,896 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:18:35,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [338859665] [2022-01-10 08:18:35,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:18:35,896 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:18:35,896 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:18:35,897 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 08:18:35,899 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 08:18:35,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:18:35,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:18:35,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:18:36,035 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-10 08:18:36,036 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:18:36,036 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:18:36,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [338859665] [2022-01-10 08:18:36,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [338859665] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:18:36,036 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:18:36,036 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 08:18:36,036 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669912774] [2022-01-10 08:18:36,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:18:36,037 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:18:36,037 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:18:36,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:18:36,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:18:36,037 INFO L87 Difference]: Start difference. First operand 750 states and 1021 transitions. Second operand has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-01-10 08:18:36,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:18:36,069 INFO L93 Difference]: Finished difference Result 1142 states and 1527 transitions. [2022-01-10 08:18:36,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 08:18:36,070 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 68 [2022-01-10 08:18:36,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:18:36,073 INFO L225 Difference]: With dead ends: 1142 [2022-01-10 08:18:36,073 INFO L226 Difference]: Without dead ends: 825 [2022-01-10 08:18:36,074 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 65 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 08:18:36,074 INFO L933 BasicCegarLoop]: 505 mSDtfsCounter, 39 mSDsluCounter, 1471 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 1976 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 08:18:36,074 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 1976 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:18:36,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 825 states. [2022-01-10 08:18:36,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 825 to 765. [2022-01-10 08:18:36,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 765 states, 680 states have (on average 1.3441176470588236) internal successors, (914), 688 states have internal predecessors, (914), 55 states have call successors, (55), 28 states have call predecessors, (55), 28 states have return successors, (67), 49 states have call predecessors, (67), 51 states have call successors, (67) [2022-01-10 08:18:36,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 765 states to 765 states and 1036 transitions. [2022-01-10 08:18:36,096 INFO L78 Accepts]: Start accepts. Automaton has 765 states and 1036 transitions. Word has length 68 [2022-01-10 08:18:36,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:18:36,096 INFO L470 AbstractCegarLoop]: Abstraction has 765 states and 1036 transitions. [2022-01-10 08:18:36,096 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-01-10 08:18:36,096 INFO L276 IsEmpty]: Start isEmpty. Operand 765 states and 1036 transitions. [2022-01-10 08:18:36,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-01-10 08:18:36,097 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:18:36,097 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 08:18:36,107 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-01-10 08:18:36,299 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 08:18:36,302 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:18:36,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:18:36,302 INFO L85 PathProgramCache]: Analyzing trace with hash -1500797044, now seen corresponding path program 1 times [2022-01-10 08:18:36,303 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:18:36,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1733504839] [2022-01-10 08:18:36,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:18:36,303 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:18:36,303 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:18:36,304 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 08:18:36,305 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 08:18:36,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:18:36,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:18:36,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:18:36,469 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 08:18:36,469 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 08:18:36,560 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 08:18:36,560 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:18:36,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1733504839] [2022-01-10 08:18:36,560 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1733504839] provided 1 perfect and 1 imperfect interpolant sequences [2022-01-10 08:18:36,560 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-10 08:18:36,560 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 4 [2022-01-10 08:18:36,560 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696248533] [2022-01-10 08:18:36,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:18:36,561 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 08:18:36,561 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:18:36,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 08:18:36,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 08:18:36,562 INFO L87 Difference]: Start difference. First operand 765 states and 1036 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 08:18:36,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:18:36,678 INFO L93 Difference]: Finished difference Result 816 states and 1097 transitions. [2022-01-10 08:18:36,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 08:18:36,679 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 08:18:36,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:18:36,681 INFO L225 Difference]: With dead ends: 816 [2022-01-10 08:18:36,681 INFO L226 Difference]: Without dead ends: 813 [2022-01-10 08:18:36,681 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 08:18:36,683 INFO L933 BasicCegarLoop]: 516 mSDtfsCounter, 883 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 883 SdHoareTripleChecker+Valid, 581 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 08:18:36,683 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [883 Valid, 581 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 08:18:36,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 813 states. [2022-01-10 08:18:36,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 813 to 764. [2022-01-10 08:18:36,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 764 states, 680 states have (on average 1.3411764705882352) internal successors, (912), 687 states have internal predecessors, (912), 54 states have call successors, (54), 28 states have call predecessors, (54), 28 states have return successors, (67), 49 states have call predecessors, (67), 51 states have call successors, (67) [2022-01-10 08:18:36,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 764 states to 764 states and 1033 transitions. [2022-01-10 08:18:36,706 INFO L78 Accepts]: Start accepts. Automaton has 764 states and 1033 transitions. Word has length 68 [2022-01-10 08:18:36,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:18:36,707 INFO L470 AbstractCegarLoop]: Abstraction has 764 states and 1033 transitions. [2022-01-10 08:18:36,707 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 08:18:36,707 INFO L276 IsEmpty]: Start isEmpty. Operand 764 states and 1033 transitions. [2022-01-10 08:18:36,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-01-10 08:18:36,708 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:18:36,708 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 08:18:36,721 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-01-10 08:18:36,915 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 08:18:36,915 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:18:36,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:18:36,915 INFO L85 PathProgramCache]: Analyzing trace with hash 718877855, now seen corresponding path program 1 times [2022-01-10 08:18:36,916 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:18:36,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [548138137] [2022-01-10 08:18:36,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:18:36,916 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:18:36,916 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:18:36,917 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 08:18:36,932 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 08:18:36,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:18:36,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-10 08:18:36,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:18:37,285 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 08:18:37,286 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 08:18:37,398 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 08:18:37,398 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:18:37,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [548138137] [2022-01-10 08:18:37,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [548138137] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 08:18:37,398 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 08:18:37,398 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 7 [2022-01-10 08:18:37,398 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466819002] [2022-01-10 08:18:37,398 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 08:18:37,399 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-10 08:18:37,399 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:18:37,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-10 08:18:37,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-01-10 08:18:37,399 INFO L87 Difference]: Start difference. First operand 764 states and 1033 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 08:18:37,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:18:37,640 INFO L93 Difference]: Finished difference Result 1392 states and 1819 transitions. [2022-01-10 08:18:37,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 08:18:37,640 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 08:18:37,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:18:37,644 INFO L225 Difference]: With dead ends: 1392 [2022-01-10 08:18:37,644 INFO L226 Difference]: Without dead ends: 1389 [2022-01-10 08:18:37,645 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 08:18:37,645 INFO L933 BasicCegarLoop]: 589 mSDtfsCounter, 1027 mSDsluCounter, 1671 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1027 SdHoareTripleChecker+Valid, 2260 SdHoareTripleChecker+Invalid, 286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 08:18:37,645 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1027 Valid, 2260 Invalid, 286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 234 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 08:18:37,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1389 states. [2022-01-10 08:18:37,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1389 to 1077. [2022-01-10 08:18:37,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1077 states, 959 states have (on average 1.310740354535975) internal successors, (1257), 970 states have internal predecessors, (1257), 73 states have call successors, (73), 41 states have call predecessors, (73), 43 states have return successors, (96), 66 states have call predecessors, (96), 70 states have call successors, (96) [2022-01-10 08:18:37,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1077 states to 1077 states and 1426 transitions. [2022-01-10 08:18:37,678 INFO L78 Accepts]: Start accepts. Automaton has 1077 states and 1426 transitions. Word has length 69 [2022-01-10 08:18:37,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:18:37,678 INFO L470 AbstractCegarLoop]: Abstraction has 1077 states and 1426 transitions. [2022-01-10 08:18:37,678 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 08:18:37,678 INFO L276 IsEmpty]: Start isEmpty. Operand 1077 states and 1426 transitions. [2022-01-10 08:18:37,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-01-10 08:18:37,680 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:18:37,680 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 08:18:37,687 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 08:18:37,886 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 08:18:37,887 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:18:37,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:18:37,887 INFO L85 PathProgramCache]: Analyzing trace with hash 155816347, now seen corresponding path program 2 times [2022-01-10 08:18:37,887 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:18:37,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1001189209] [2022-01-10 08:18:37,888 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 08:18:37,888 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:18:37,888 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:18:37,889 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 08:18:37,889 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 08:18:37,961 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 08:18:37,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 08:18:37,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 08:18:37,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:18:38,065 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 08:18:38,065 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:18:38,065 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:18:38,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1001189209] [2022-01-10 08:18:38,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1001189209] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:18:38,066 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:18:38,066 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 08:18:38,066 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742902571] [2022-01-10 08:18:38,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:18:38,066 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 08:18:38,066 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:18:38,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 08:18:38,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:18:38,067 INFO L87 Difference]: Start difference. First operand 1077 states and 1426 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 08:18:38,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:18:38,110 INFO L93 Difference]: Finished difference Result 1631 states and 2122 transitions. [2022-01-10 08:18:38,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 08:18:38,111 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 08:18:38,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:18:38,115 INFO L225 Difference]: With dead ends: 1631 [2022-01-10 08:18:38,115 INFO L226 Difference]: Without dead ends: 1011 [2022-01-10 08:18:38,116 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 08:18:38,117 INFO L933 BasicCegarLoop]: 522 mSDtfsCounter, 453 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 453 SdHoareTripleChecker+Valid, 594 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 08:18:38,117 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [453 Valid, 594 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:18:38,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1011 states. [2022-01-10 08:18:38,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1011 to 1005. [2022-01-10 08:18:38,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1005 states, 894 states have (on average 1.3042505592841163) internal successors, (1166), 905 states have internal predecessors, (1166), 70 states have call successors, (70), 38 states have call predecessors, (70), 39 states have return successors, (91), 62 states have call predecessors, (91), 67 states have call successors, (91) [2022-01-10 08:18:38,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1005 states to 1005 states and 1327 transitions. [2022-01-10 08:18:38,148 INFO L78 Accepts]: Start accepts. Automaton has 1005 states and 1327 transitions. Word has length 88 [2022-01-10 08:18:38,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:18:38,148 INFO L470 AbstractCegarLoop]: Abstraction has 1005 states and 1327 transitions. [2022-01-10 08:18:38,148 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 08:18:38,148 INFO L276 IsEmpty]: Start isEmpty. Operand 1005 states and 1327 transitions. [2022-01-10 08:18:38,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-01-10 08:18:38,150 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:18:38,150 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 08:18:38,165 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 08:18:38,365 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 08:18:38,366 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:18:38,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:18:38,366 INFO L85 PathProgramCache]: Analyzing trace with hash -1428941089, now seen corresponding path program 1 times [2022-01-10 08:18:38,366 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:18:38,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [559836340] [2022-01-10 08:18:38,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:18:38,367 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:18:38,367 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:18:38,368 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 08:18:38,369 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 08:18:38,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:18:38,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:18:38,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:18:38,574 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 08:18:38,575 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:18:38,575 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:18:38,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [559836340] [2022-01-10 08:18:38,575 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [559836340] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:18:38,575 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:18:38,575 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 08:18:38,575 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21858663] [2022-01-10 08:18:38,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:18:38,576 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 08:18:38,576 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:18:38,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 08:18:38,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 08:18:38,576 INFO L87 Difference]: Start difference. First operand 1005 states and 1327 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 08:18:38,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:18:38,759 INFO L93 Difference]: Finished difference Result 1773 states and 2284 transitions. [2022-01-10 08:18:38,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 08:18:38,759 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 08:18:38,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:18:38,763 INFO L225 Difference]: With dead ends: 1773 [2022-01-10 08:18:38,763 INFO L226 Difference]: Without dead ends: 1034 [2022-01-10 08:18:38,765 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 08:18:38,765 INFO L933 BasicCegarLoop]: 484 mSDtfsCounter, 622 mSDsluCounter, 304 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 643 SdHoareTripleChecker+Valid, 788 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 08:18:38,765 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [643 Valid, 788 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 08:18:38,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1034 states. [2022-01-10 08:18:38,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1034 to 1005. [2022-01-10 08:18:38,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1005 states, 894 states have (on average 1.2874720357941833) internal successors, (1151), 905 states have internal predecessors, (1151), 70 states have call successors, (70), 38 states have call predecessors, (70), 39 states have return successors, (90), 62 states have call predecessors, (90), 67 states have call successors, (90) [2022-01-10 08:18:38,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1005 states to 1005 states and 1311 transitions. [2022-01-10 08:18:38,805 INFO L78 Accepts]: Start accepts. Automaton has 1005 states and 1311 transitions. Word has length 103 [2022-01-10 08:18:38,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:18:38,806 INFO L470 AbstractCegarLoop]: Abstraction has 1005 states and 1311 transitions. [2022-01-10 08:18:38,806 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 08:18:38,806 INFO L276 IsEmpty]: Start isEmpty. Operand 1005 states and 1311 transitions. [2022-01-10 08:18:38,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-01-10 08:18:38,808 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:18:38,808 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 08:18:38,819 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 08:18:39,014 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 08:18:39,014 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:18:39,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:18:39,015 INFO L85 PathProgramCache]: Analyzing trace with hash -1164528974, now seen corresponding path program 1 times [2022-01-10 08:18:39,015 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:18:39,015 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [262677431] [2022-01-10 08:18:39,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:18:39,015 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:18:39,016 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:18:39,016 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 08:18:39,018 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 08:18:39,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:18:39,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 08:18:39,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:18:39,184 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 08:18:39,184 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:18:39,185 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:18:39,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [262677431] [2022-01-10 08:18:39,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [262677431] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:18:39,185 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:18:39,185 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 08:18:39,185 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327732004] [2022-01-10 08:18:39,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:18:39,185 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 08:18:39,185 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:18:39,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 08:18:39,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:18:39,186 INFO L87 Difference]: Start difference. First operand 1005 states and 1311 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 08:18:39,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:18:39,217 INFO L93 Difference]: Finished difference Result 1327 states and 1698 transitions. [2022-01-10 08:18:39,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 08:18:39,218 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 08:18:39,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:18:39,219 INFO L225 Difference]: With dead ends: 1327 [2022-01-10 08:18:39,219 INFO L226 Difference]: Without dead ends: 260 [2022-01-10 08:18:39,221 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 08:18:39,221 INFO L933 BasicCegarLoop]: 537 mSDtfsCounter, 54 mSDsluCounter, 468 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 1005 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 08:18:39,221 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 1005 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:18:39,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2022-01-10 08:18:39,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 260. [2022-01-10 08:18:39,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 230 states have (on average 1.5608695652173914) internal successors, (359), 232 states have internal predecessors, (359), 23 states have call successors, (23), 7 states have call predecessors, (23), 6 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2022-01-10 08:18:39,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 403 transitions. [2022-01-10 08:18:39,228 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 403 transitions. Word has length 104 [2022-01-10 08:18:39,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:18:39,228 INFO L470 AbstractCegarLoop]: Abstraction has 260 states and 403 transitions. [2022-01-10 08:18:39,228 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 08:18:39,228 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 403 transitions. [2022-01-10 08:18:39,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-01-10 08:18:39,229 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:18:39,229 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] [2022-01-10 08:18:39,247 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Ended with exit code 0 [2022-01-10 08:18:39,435 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 08:18:39,435 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:18:39,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:18:39,436 INFO L85 PathProgramCache]: Analyzing trace with hash 1566264591, now seen corresponding path program 1 times [2022-01-10 08:18:39,436 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:18:39,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1552291956] [2022-01-10 08:18:39,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:18:39,436 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:18:39,437 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:18:39,437 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 08:18:39,439 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 08:18:39,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:18:39,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 08:18:39,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:18:39,671 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 08:18:39,671 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:18:39,671 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:18:39,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1552291956] [2022-01-10 08:18:39,671 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1552291956] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:18:39,672 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:18:39,672 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 08:18:39,672 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032515111] [2022-01-10 08:18:39,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:18:39,672 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 08:18:39,672 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:18:39,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 08:18:39,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:18:39,673 INFO L87 Difference]: Start difference. First operand 260 states and 403 transitions. Second operand has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:18:39,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:18:39,691 INFO L93 Difference]: Finished difference Result 508 states and 787 transitions. [2022-01-10 08:18:39,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 08:18:39,691 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 124 [2022-01-10 08:18:39,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:18:39,692 INFO L225 Difference]: With dead ends: 508 [2022-01-10 08:18:39,692 INFO L226 Difference]: Without dead ends: 260 [2022-01-10 08:18:39,693 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 122 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 08:18:39,693 INFO L933 BasicCegarLoop]: 401 mSDtfsCounter, 389 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 389 SdHoareTripleChecker+Valid, 402 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 08:18:39,693 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [389 Valid, 402 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:18:39,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2022-01-10 08:18:39,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 260. [2022-01-10 08:18:39,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 230 states have (on average 1.5565217391304347) internal successors, (358), 232 states have internal predecessors, (358), 23 states have call successors, (23), 7 states have call predecessors, (23), 6 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2022-01-10 08:18:39,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 402 transitions. [2022-01-10 08:18:39,700 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 402 transitions. Word has length 124 [2022-01-10 08:18:39,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:18:39,700 INFO L470 AbstractCegarLoop]: Abstraction has 260 states and 402 transitions. [2022-01-10 08:18:39,701 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:18:39,701 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 402 transitions. [2022-01-10 08:18:39,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-01-10 08:18:39,701 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:18:39,701 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:18:39,715 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 08:18:39,908 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 08:18:39,908 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:18:39,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:18:39,909 INFO L85 PathProgramCache]: Analyzing trace with hash -1081339763, now seen corresponding path program 1 times [2022-01-10 08:18:39,909 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:18:39,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [428187264] [2022-01-10 08:18:39,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:18:39,909 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:18:39,909 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:18:39,910 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 08:18:39,912 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 08:18:39,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:18:40,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:18:40,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:18:40,159 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 08:18:40,159 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:18:40,160 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:18:40,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [428187264] [2022-01-10 08:18:40,160 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [428187264] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:18:40,160 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:18:40,160 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 08:18:40,160 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408260384] [2022-01-10 08:18:40,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:18:40,160 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:18:40,160 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:18:40,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:18:40,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:18:40,161 INFO L87 Difference]: Start difference. First operand 260 states and 402 transitions. Second operand has 5 states, 5 states have (on average 22.6) internal successors, (113), 3 states have internal predecessors, (113), 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 08:18:40,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:18:40,521 INFO L93 Difference]: Finished difference Result 776 states and 1214 transitions. [2022-01-10 08:18:40,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 08:18:40,522 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.6) internal successors, (113), 3 states have internal predecessors, (113), 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 124 [2022-01-10 08:18:40,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:18:40,524 INFO L225 Difference]: With dead ends: 776 [2022-01-10 08:18:40,524 INFO L226 Difference]: Without dead ends: 532 [2022-01-10 08:18:40,524 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 120 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 08:18:40,525 INFO L933 BasicCegarLoop]: 432 mSDtfsCounter, 737 mSDsluCounter, 792 mSDsCounter, 0 mSdLazyCounter, 357 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 752 SdHoareTripleChecker+Valid, 1224 SdHoareTripleChecker+Invalid, 408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 08:18:40,525 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [752 Valid, 1224 Invalid, 408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 357 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 08:18:40,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 532 states. [2022-01-10 08:18:40,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 532 to 511. [2022-01-10 08:18:40,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 511 states, 458 states have (on average 1.5698689956331877) internal successors, (719), 461 states have internal predecessors, (719), 39 states have call successors, (39), 13 states have call predecessors, (39), 13 states have return successors, (38), 37 states have call predecessors, (38), 37 states have call successors, (38) [2022-01-10 08:18:40,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 511 states to 511 states and 796 transitions. [2022-01-10 08:18:40,537 INFO L78 Accepts]: Start accepts. Automaton has 511 states and 796 transitions. Word has length 124 [2022-01-10 08:18:40,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:18:40,538 INFO L470 AbstractCegarLoop]: Abstraction has 511 states and 796 transitions. [2022-01-10 08:18:40,538 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.6) internal successors, (113), 3 states have internal predecessors, (113), 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 08:18:40,538 INFO L276 IsEmpty]: Start isEmpty. Operand 511 states and 796 transitions. [2022-01-10 08:18:40,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-01-10 08:18:40,538 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:18:40,538 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] [2022-01-10 08:18:40,549 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 08:18:40,745 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 08:18:40,745 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:18:40,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:18:40,746 INFO L85 PathProgramCache]: Analyzing trace with hash -2098988151, now seen corresponding path program 1 times [2022-01-10 08:18:40,746 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:18:40,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1613967458] [2022-01-10 08:18:40,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:18:40,746 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:18:40,746 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:18:40,747 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 08:18:40,748 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 08:18:40,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:18:40,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:18:40,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:18:40,989 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 08:18:40,989 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:18:40,989 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:18:40,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1613967458] [2022-01-10 08:18:40,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1613967458] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:18:40,989 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:18:40,989 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 08:18:40,990 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114262282] [2022-01-10 08:18:40,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:18:40,990 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:18:40,990 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:18:40,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:18:40,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:18:40,990 INFO L87 Difference]: Start difference. First operand 511 states and 796 transitions. Second operand has 5 states, 5 states have (on average 22.6) internal successors, (113), 4 states have internal predecessors, (113), 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 08:18:41,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:18:41,211 INFO L93 Difference]: Finished difference Result 1006 states and 1574 transitions. [2022-01-10 08:18:41,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 08:18:41,215 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.6) internal successors, (113), 4 states have internal predecessors, (113), 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 124 [2022-01-10 08:18:41,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:18:41,217 INFO L225 Difference]: With dead ends: 1006 [2022-01-10 08:18:41,217 INFO L226 Difference]: Without dead ends: 511 [2022-01-10 08:18:41,218 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 120 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 08:18:41,218 INFO L933 BasicCegarLoop]: 375 mSDtfsCounter, 527 mSDsluCounter, 435 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 542 SdHoareTripleChecker+Valid, 810 SdHoareTripleChecker+Invalid, 228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 08:18:41,218 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [542 Valid, 810 Invalid, 228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 08:18:41,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 511 states. [2022-01-10 08:18:41,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 511 to 511. [2022-01-10 08:18:41,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 511 states, 458 states have (on average 1.554585152838428) internal successors, (712), 461 states have internal predecessors, (712), 39 states have call successors, (39), 13 states have call predecessors, (39), 13 states have return successors, (38), 37 states have call predecessors, (38), 37 states have call successors, (38) [2022-01-10 08:18:41,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 511 states to 511 states and 789 transitions. [2022-01-10 08:18:41,231 INFO L78 Accepts]: Start accepts. Automaton has 511 states and 789 transitions. Word has length 124 [2022-01-10 08:18:41,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:18:41,231 INFO L470 AbstractCegarLoop]: Abstraction has 511 states and 789 transitions. [2022-01-10 08:18:41,231 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.6) internal successors, (113), 4 states have internal predecessors, (113), 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 08:18:41,231 INFO L276 IsEmpty]: Start isEmpty. Operand 511 states and 789 transitions. [2022-01-10 08:18:41,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-01-10 08:18:41,232 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:18:41,232 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] [2022-01-10 08:18:41,243 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 08:18:41,439 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 08:18:41,439 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:18:41,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:18:41,440 INFO L85 PathProgramCache]: Analyzing trace with hash 1470415117, now seen corresponding path program 1 times [2022-01-10 08:18:41,440 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:18:41,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [474708102] [2022-01-10 08:18:41,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:18:41,440 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:18:41,440 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:18:41,441 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 08:18:41,442 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 08:18:41,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:18:41,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:18:41,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:18:41,672 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 08:18:41,672 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:18:41,673 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:18:41,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [474708102] [2022-01-10 08:18:41,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [474708102] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:18:41,673 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:18:41,673 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 08:18:41,673 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648324542] [2022-01-10 08:18:41,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:18:41,673 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:18:41,673 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:18:41,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:18:41,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:18:41,674 INFO L87 Difference]: Start difference. First operand 511 states and 789 transitions. Second operand has 5 states, 5 states have (on average 22.6) internal successors, (113), 4 states have internal predecessors, (113), 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 08:18:41,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:18:41,883 INFO L93 Difference]: Finished difference Result 1006 states and 1560 transitions. [2022-01-10 08:18:41,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 08:18:41,883 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.6) internal successors, (113), 4 states have internal predecessors, (113), 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 124 [2022-01-10 08:18:41,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:18:41,885 INFO L225 Difference]: With dead ends: 1006 [2022-01-10 08:18:41,885 INFO L226 Difference]: Without dead ends: 511 [2022-01-10 08:18:41,886 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 120 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 08:18:41,886 INFO L933 BasicCegarLoop]: 372 mSDtfsCounter, 521 mSDsluCounter, 431 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 536 SdHoareTripleChecker+Valid, 803 SdHoareTripleChecker+Invalid, 228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 08:18:41,887 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [536 Valid, 803 Invalid, 228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 08:18:41,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 511 states. [2022-01-10 08:18:41,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 511 to 511. [2022-01-10 08:18:41,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 511 states, 458 states have (on average 1.539301310043668) internal successors, (705), 461 states have internal predecessors, (705), 39 states have call successors, (39), 13 states have call predecessors, (39), 13 states have return successors, (38), 37 states have call predecessors, (38), 37 states have call successors, (38) [2022-01-10 08:18:41,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 511 states to 511 states and 782 transitions. [2022-01-10 08:18:41,909 INFO L78 Accepts]: Start accepts. Automaton has 511 states and 782 transitions. Word has length 124 [2022-01-10 08:18:41,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:18:41,910 INFO L470 AbstractCegarLoop]: Abstraction has 511 states and 782 transitions. [2022-01-10 08:18:41,910 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.6) internal successors, (113), 4 states have internal predecessors, (113), 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 08:18:41,910 INFO L276 IsEmpty]: Start isEmpty. Operand 511 states and 782 transitions. [2022-01-10 08:18:41,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-01-10 08:18:41,910 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:18:41,910 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] [2022-01-10 08:18:41,918 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 08:18:42,118 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 08:18:42,118 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:18:42,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:18:42,119 INFO L85 PathProgramCache]: Analyzing trace with hash 615725833, now seen corresponding path program 1 times [2022-01-10 08:18:42,119 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:18:42,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1075138490] [2022-01-10 08:18:42,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:18:42,119 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:18:42,119 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:18:42,120 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 08:18:42,122 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 08:18:42,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:18:42,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:18:42,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:18:42,347 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 08:18:42,348 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:18:42,348 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:18:42,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1075138490] [2022-01-10 08:18:42,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1075138490] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:18:42,348 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:18:42,348 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 08:18:42,348 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523166183] [2022-01-10 08:18:42,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:18:42,348 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:18:42,348 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:18:42,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:18:42,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:18:42,349 INFO L87 Difference]: Start difference. First operand 511 states and 782 transitions. Second operand has 5 states, 5 states have (on average 22.6) internal successors, (113), 4 states have internal predecessors, (113), 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 08:18:42,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:18:42,559 INFO L93 Difference]: Finished difference Result 1006 states and 1546 transitions. [2022-01-10 08:18:42,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 08:18:42,559 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.6) internal successors, (113), 4 states have internal predecessors, (113), 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 124 [2022-01-10 08:18:42,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:18:42,561 INFO L225 Difference]: With dead ends: 1006 [2022-01-10 08:18:42,561 INFO L226 Difference]: Without dead ends: 511 [2022-01-10 08:18:42,562 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 120 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 08:18:42,562 INFO L933 BasicCegarLoop]: 369 mSDtfsCounter, 514 mSDsluCounter, 427 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 529 SdHoareTripleChecker+Valid, 796 SdHoareTripleChecker+Invalid, 228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 08:18:42,563 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [529 Valid, 796 Invalid, 228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 08:18:42,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 511 states. [2022-01-10 08:18:42,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 511 to 511. [2022-01-10 08:18:42,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 511 states, 458 states have (on average 1.5240174672489082) internal successors, (698), 461 states have internal predecessors, (698), 39 states have call successors, (39), 13 states have call predecessors, (39), 13 states have return successors, (38), 37 states have call predecessors, (38), 37 states have call successors, (38) [2022-01-10 08:18:42,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 511 states to 511 states and 775 transitions. [2022-01-10 08:18:42,575 INFO L78 Accepts]: Start accepts. Automaton has 511 states and 775 transitions. Word has length 124 [2022-01-10 08:18:42,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:18:42,576 INFO L470 AbstractCegarLoop]: Abstraction has 511 states and 775 transitions. [2022-01-10 08:18:42,576 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.6) internal successors, (113), 4 states have internal predecessors, (113), 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 08:18:42,576 INFO L276 IsEmpty]: Start isEmpty. Operand 511 states and 775 transitions. [2022-01-10 08:18:42,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-01-10 08:18:42,576 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:18:42,576 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] [2022-01-10 08:18:42,585 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 08:18:42,783 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 08:18:42,784 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:18:42,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:18:42,784 INFO L85 PathProgramCache]: Analyzing trace with hash -1250982841, now seen corresponding path program 1 times [2022-01-10 08:18:42,784 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:18:42,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1787175640] [2022-01-10 08:18:42,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:18:42,785 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:18:42,785 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:18:42,785 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 08:18:42,788 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 08:18:42,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:18:42,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:18:42,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:18:43,024 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 08:18:43,024 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:18:43,024 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:18:43,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1787175640] [2022-01-10 08:18:43,024 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1787175640] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:18:43,024 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:18:43,024 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 08:18:43,025 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741699624] [2022-01-10 08:18:43,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:18:43,025 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:18:43,025 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:18:43,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:18:43,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:18:43,025 INFO L87 Difference]: Start difference. First operand 511 states and 775 transitions. Second operand has 5 states, 5 states have (on average 22.6) internal successors, (113), 4 states have internal predecessors, (113), 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 08:18:43,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:18:43,231 INFO L93 Difference]: Finished difference Result 1006 states and 1532 transitions. [2022-01-10 08:18:43,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 08:18:43,239 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.6) internal successors, (113), 4 states have internal predecessors, (113), 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 124 [2022-01-10 08:18:43,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:18:43,242 INFO L225 Difference]: With dead ends: 1006 [2022-01-10 08:18:43,242 INFO L226 Difference]: Without dead ends: 511 [2022-01-10 08:18:43,243 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 120 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 08:18:43,243 INFO L933 BasicCegarLoop]: 366 mSDtfsCounter, 508 mSDsluCounter, 423 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 523 SdHoareTripleChecker+Valid, 789 SdHoareTripleChecker+Invalid, 228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 08:18:43,244 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [523 Valid, 789 Invalid, 228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 08:18:43,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 511 states. [2022-01-10 08:18:43,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 511 to 511. [2022-01-10 08:18:43,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 511 states, 458 states have (on average 1.5087336244541485) internal successors, (691), 461 states have internal predecessors, (691), 39 states have call successors, (39), 13 states have call predecessors, (39), 13 states have return successors, (38), 37 states have call predecessors, (38), 37 states have call successors, (38) [2022-01-10 08:18:43,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 511 states to 511 states and 768 transitions. [2022-01-10 08:18:43,260 INFO L78 Accepts]: Start accepts. Automaton has 511 states and 768 transitions. Word has length 124 [2022-01-10 08:18:43,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:18:43,261 INFO L470 AbstractCegarLoop]: Abstraction has 511 states and 768 transitions. [2022-01-10 08:18:43,261 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.6) internal successors, (113), 4 states have internal predecessors, (113), 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 08:18:43,261 INFO L276 IsEmpty]: Start isEmpty. Operand 511 states and 768 transitions. [2022-01-10 08:18:43,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-01-10 08:18:43,261 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:18:43,261 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] [2022-01-10 08:18:43,271 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 08:18:43,468 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 08:18:43,468 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:18:43,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:18:43,468 INFO L85 PathProgramCache]: Analyzing trace with hash -1856525365, now seen corresponding path program 1 times [2022-01-10 08:18:43,469 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:18:43,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1781823842] [2022-01-10 08:18:43,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:18:43,469 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:18:43,469 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:18:43,470 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 08:18:43,487 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 08:18:43,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:18:43,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:18:43,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:18:43,709 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 08:18:43,709 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:18:43,709 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:18:43,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1781823842] [2022-01-10 08:18:43,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1781823842] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:18:43,709 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:18:43,709 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 08:18:43,709 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356198951] [2022-01-10 08:18:43,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:18:43,710 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:18:43,710 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:18:43,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:18:43,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:18:43,710 INFO L87 Difference]: Start difference. First operand 511 states and 768 transitions. Second operand has 5 states, 5 states have (on average 22.6) internal successors, (113), 4 states have internal predecessors, (113), 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 08:18:43,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:18:43,923 INFO L93 Difference]: Finished difference Result 1006 states and 1518 transitions. [2022-01-10 08:18:43,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 08:18:43,923 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.6) internal successors, (113), 4 states have internal predecessors, (113), 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 124 [2022-01-10 08:18:43,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:18:43,925 INFO L225 Difference]: With dead ends: 1006 [2022-01-10 08:18:43,925 INFO L226 Difference]: Without dead ends: 511 [2022-01-10 08:18:43,926 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 120 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 08:18:43,926 INFO L933 BasicCegarLoop]: 363 mSDtfsCounter, 502 mSDsluCounter, 419 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 517 SdHoareTripleChecker+Valid, 782 SdHoareTripleChecker+Invalid, 228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 08:18:43,926 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [517 Valid, 782 Invalid, 228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 08:18:43,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 511 states. [2022-01-10 08:18:43,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 511 to 511. [2022-01-10 08:18:43,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 511 states, 458 states have (on average 1.4934497816593886) internal successors, (684), 461 states have internal predecessors, (684), 39 states have call successors, (39), 13 states have call predecessors, (39), 13 states have return successors, (38), 37 states have call predecessors, (38), 37 states have call successors, (38) [2022-01-10 08:18:43,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 511 states to 511 states and 761 transitions. [2022-01-10 08:18:43,941 INFO L78 Accepts]: Start accepts. Automaton has 511 states and 761 transitions. Word has length 124 [2022-01-10 08:18:43,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:18:43,941 INFO L470 AbstractCegarLoop]: Abstraction has 511 states and 761 transitions. [2022-01-10 08:18:43,942 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.6) internal successors, (113), 4 states have internal predecessors, (113), 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 08:18:43,942 INFO L276 IsEmpty]: Start isEmpty. Operand 511 states and 761 transitions. [2022-01-10 08:18:43,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-01-10 08:18:43,942 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:18:43,942 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] [2022-01-10 08:18:43,956 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 08:18:44,149 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 08:18:44,150 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:18:44,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:18:44,150 INFO L85 PathProgramCache]: Analyzing trace with hash 63603655, now seen corresponding path program 1 times [2022-01-10 08:18:44,150 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:18:44,150 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [90028684] [2022-01-10 08:18:44,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:18:44,150 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:18:44,150 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:18:44,151 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 08:18:44,152 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 08:18:44,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:18:44,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:18:44,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:18:44,389 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 08:18:44,389 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:18:44,389 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:18:44,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [90028684] [2022-01-10 08:18:44,389 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [90028684] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:18:44,389 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:18:44,389 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 08:18:44,389 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713879642] [2022-01-10 08:18:44,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:18:44,390 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:18:44,390 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:18:44,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:18:44,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:18:44,390 INFO L87 Difference]: Start difference. First operand 511 states and 761 transitions. Second operand has 5 states, 5 states have (on average 22.6) internal successors, (113), 4 states have internal predecessors, (113), 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 08:18:44,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:18:44,607 INFO L93 Difference]: Finished difference Result 1006 states and 1504 transitions. [2022-01-10 08:18:44,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 08:18:44,608 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.6) internal successors, (113), 4 states have internal predecessors, (113), 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 124 [2022-01-10 08:18:44,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:18:44,610 INFO L225 Difference]: With dead ends: 1006 [2022-01-10 08:18:44,610 INFO L226 Difference]: Without dead ends: 511 [2022-01-10 08:18:44,611 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 120 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 08:18:44,611 INFO L933 BasicCegarLoop]: 360 mSDtfsCounter, 496 mSDsluCounter, 415 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 511 SdHoareTripleChecker+Valid, 775 SdHoareTripleChecker+Invalid, 228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 08:18:44,611 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [511 Valid, 775 Invalid, 228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 08:18:44,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 511 states. [2022-01-10 08:18:44,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 511 to 511. [2022-01-10 08:18:44,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 511 states, 458 states have (on average 1.4781659388646289) internal successors, (677), 461 states have internal predecessors, (677), 39 states have call successors, (39), 13 states have call predecessors, (39), 13 states have return successors, (38), 37 states have call predecessors, (38), 37 states have call successors, (38) [2022-01-10 08:18:44,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 511 states to 511 states and 754 transitions. [2022-01-10 08:18:44,630 INFO L78 Accepts]: Start accepts. Automaton has 511 states and 754 transitions. Word has length 124 [2022-01-10 08:18:44,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:18:44,630 INFO L470 AbstractCegarLoop]: Abstraction has 511 states and 754 transitions. [2022-01-10 08:18:44,630 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.6) internal successors, (113), 4 states have internal predecessors, (113), 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 08:18:44,630 INFO L276 IsEmpty]: Start isEmpty. Operand 511 states and 754 transitions. [2022-01-10 08:18:44,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-01-10 08:18:44,631 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:18:44,631 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] [2022-01-10 08:18:44,638 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 08:18:44,838 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 08:18:44,839 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:18:44,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:18:44,839 INFO L85 PathProgramCache]: Analyzing trace with hash -1814119349, now seen corresponding path program 1 times [2022-01-10 08:18:44,839 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:18:44,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [281631675] [2022-01-10 08:18:44,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:18:44,840 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:18:44,840 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:18:44,840 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 08:18:44,841 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 08:18:44,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:18:44,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:18:44,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:18:45,089 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 08:18:45,089 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:18:45,089 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:18:45,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [281631675] [2022-01-10 08:18:45,090 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [281631675] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:18:45,090 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:18:45,090 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 08:18:45,090 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182047864] [2022-01-10 08:18:45,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:18:45,090 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:18:45,090 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:18:45,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:18:45,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:18:45,091 INFO L87 Difference]: Start difference. First operand 511 states and 754 transitions. Second operand has 5 states, 5 states have (on average 22.6) internal successors, (113), 4 states have internal predecessors, (113), 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 08:18:45,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:18:45,368 INFO L93 Difference]: Finished difference Result 1128 states and 1678 transitions. [2022-01-10 08:18:45,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 08:18:45,369 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.6) internal successors, (113), 4 states have internal predecessors, (113), 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 124 [2022-01-10 08:18:45,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:18:45,371 INFO L225 Difference]: With dead ends: 1128 [2022-01-10 08:18:45,371 INFO L226 Difference]: Without dead ends: 633 [2022-01-10 08:18:45,372 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 120 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 08:18:45,372 INFO L933 BasicCegarLoop]: 357 mSDtfsCounter, 566 mSDsluCounter, 410 mSDsCounter, 0 mSdLazyCounter, 288 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 581 SdHoareTripleChecker+Valid, 767 SdHoareTripleChecker+Invalid, 323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 08:18:45,373 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [581 Valid, 767 Invalid, 323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 288 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 08:18:45,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 633 states. [2022-01-10 08:18:45,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 633 to 633. [2022-01-10 08:18:45,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 633 states, 574 states have (on average 1.4494773519163764) internal successors, (832), 577 states have internal predecessors, (832), 41 states have call successors, (41), 17 states have call predecessors, (41), 17 states have return successors, (40), 39 states have call predecessors, (40), 39 states have call successors, (40) [2022-01-10 08:18:45,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 633 states to 633 states and 913 transitions. [2022-01-10 08:18:45,407 INFO L78 Accepts]: Start accepts. Automaton has 633 states and 913 transitions. Word has length 124 [2022-01-10 08:18:45,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:18:45,407 INFO L470 AbstractCegarLoop]: Abstraction has 633 states and 913 transitions. [2022-01-10 08:18:45,407 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.6) internal successors, (113), 4 states have internal predecessors, (113), 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 08:18:45,407 INFO L276 IsEmpty]: Start isEmpty. Operand 633 states and 913 transitions. [2022-01-10 08:18:45,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-01-10 08:18:45,408 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:18:45,408 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] [2022-01-10 08:18:45,417 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 08:18:45,615 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 08:18:45,615 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:18:45,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:18:45,615 INFO L85 PathProgramCache]: Analyzing trace with hash 986891942, now seen corresponding path program 1 times [2022-01-10 08:18:45,616 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:18:45,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [91173703] [2022-01-10 08:18:45,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:18:45,616 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:18:45,616 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:18:45,617 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 08:18:45,618 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 08:18:45,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:18:45,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:18:45,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:18:45,853 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 08:18:45,853 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:18:45,853 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:18:45,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [91173703] [2022-01-10 08:18:45,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [91173703] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:18:45,853 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:18:45,854 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 08:18:45,854 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219237725] [2022-01-10 08:18:45,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:18:45,854 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:18:45,854 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:18:45,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:18:45,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:18:45,854 INFO L87 Difference]: Start difference. First operand 633 states and 913 transitions. Second operand has 5 states, 5 states have (on average 22.6) internal successors, (113), 4 states have internal predecessors, (113), 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 08:18:46,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:18:46,144 INFO L93 Difference]: Finished difference Result 1372 states and 1996 transitions. [2022-01-10 08:18:46,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 08:18:46,144 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.6) internal successors, (113), 4 states have internal predecessors, (113), 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 124 [2022-01-10 08:18:46,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:18:46,147 INFO L225 Difference]: With dead ends: 1372 [2022-01-10 08:18:46,147 INFO L226 Difference]: Without dead ends: 755 [2022-01-10 08:18:46,148 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 120 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 08:18:46,149 INFO L933 BasicCegarLoop]: 355 mSDtfsCounter, 559 mSDsluCounter, 406 mSDsCounter, 0 mSdLazyCounter, 288 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 574 SdHoareTripleChecker+Valid, 761 SdHoareTripleChecker+Invalid, 322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 08:18:46,149 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [574 Valid, 761 Invalid, 322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 288 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 08:18:46,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 755 states. [2022-01-10 08:18:46,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 755 to 755. [2022-01-10 08:18:46,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 755 states, 690 states have (on average 1.4246376811594204) internal successors, (983), 693 states have internal predecessors, (983), 43 states have call successors, (43), 21 states have call predecessors, (43), 21 states have return successors, (42), 41 states have call predecessors, (42), 41 states have call successors, (42) [2022-01-10 08:18:46,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 755 states to 755 states and 1068 transitions. [2022-01-10 08:18:46,174 INFO L78 Accepts]: Start accepts. Automaton has 755 states and 1068 transitions. Word has length 124 [2022-01-10 08:18:46,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:18:46,174 INFO L470 AbstractCegarLoop]: Abstraction has 755 states and 1068 transitions. [2022-01-10 08:18:46,174 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.6) internal successors, (113), 4 states have internal predecessors, (113), 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 08:18:46,174 INFO L276 IsEmpty]: Start isEmpty. Operand 755 states and 1068 transitions. [2022-01-10 08:18:46,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-01-10 08:18:46,175 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:18:46,175 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] [2022-01-10 08:18:46,187 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 08:18:46,379 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 08:18:46,379 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:18:46,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:18:46,380 INFO L85 PathProgramCache]: Analyzing trace with hash 216223786, now seen corresponding path program 1 times [2022-01-10 08:18:46,380 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:18:46,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1497789573] [2022-01-10 08:18:46,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:18:46,380 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:18:46,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:18:46,381 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 08:18:46,382 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 08:18:46,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:18:46,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:18:46,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:18:46,615 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 08:18:46,615 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:18:46,616 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:18:46,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1497789573] [2022-01-10 08:18:46,616 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1497789573] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:18:46,616 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:18:46,616 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 08:18:46,616 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387427071] [2022-01-10 08:18:46,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:18:46,616 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:18:46,616 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:18:46,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:18:46,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:18:46,617 INFO L87 Difference]: Start difference. First operand 755 states and 1068 transitions. Second operand has 5 states, 5 states have (on average 22.6) internal successors, (113), 4 states have internal predecessors, (113), 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 08:18:46,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:18:46,912 INFO L93 Difference]: Finished difference Result 1616 states and 2306 transitions. [2022-01-10 08:18:46,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 08:18:46,913 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.6) internal successors, (113), 4 states have internal predecessors, (113), 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 124 [2022-01-10 08:18:46,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:18:46,915 INFO L225 Difference]: With dead ends: 1616 [2022-01-10 08:18:46,915 INFO L226 Difference]: Without dead ends: 877 [2022-01-10 08:18:46,916 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 120 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 08:18:46,917 INFO L933 BasicCegarLoop]: 350 mSDtfsCounter, 553 mSDsluCounter, 402 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 568 SdHoareTripleChecker+Valid, 752 SdHoareTripleChecker+Invalid, 320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 08:18:46,917 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [568 Valid, 752 Invalid, 320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 285 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 08:18:46,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 877 states. [2022-01-10 08:18:46,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 877 to 877. [2022-01-10 08:18:46,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 877 states, 806 states have (on average 1.401985111662531) internal successors, (1130), 809 states have internal predecessors, (1130), 45 states have call successors, (45), 25 states have call predecessors, (45), 25 states have return successors, (44), 43 states have call predecessors, (44), 43 states have call successors, (44) [2022-01-10 08:18:46,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 877 states to 877 states and 1219 transitions. [2022-01-10 08:18:46,946 INFO L78 Accepts]: Start accepts. Automaton has 877 states and 1219 transitions. Word has length 124 [2022-01-10 08:18:46,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:18:46,946 INFO L470 AbstractCegarLoop]: Abstraction has 877 states and 1219 transitions. [2022-01-10 08:18:46,946 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.6) internal successors, (113), 4 states have internal predecessors, (113), 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 08:18:46,946 INFO L276 IsEmpty]: Start isEmpty. Operand 877 states and 1219 transitions. [2022-01-10 08:18:46,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-01-10 08:18:46,946 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:18:46,946 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] [2022-01-10 08:18:46,953 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 08:18:47,152 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 08:18:47,153 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:18:47,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:18:47,153 INFO L85 PathProgramCache]: Analyzing trace with hash 888651781, now seen corresponding path program 1 times [2022-01-10 08:18:47,153 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:18:47,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1476430648] [2022-01-10 08:18:47,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:18:47,153 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:18:47,154 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:18:47,154 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 08:18:47,155 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 08:18:47,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:18:47,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:18:47,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:18:47,406 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 08:18:47,406 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:18:47,406 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:18:47,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1476430648] [2022-01-10 08:18:47,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1476430648] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:18:47,407 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:18:47,407 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 08:18:47,407 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574889687] [2022-01-10 08:18:47,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:18:47,407 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:18:47,407 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:18:47,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:18:47,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:18:47,408 INFO L87 Difference]: Start difference. First operand 877 states and 1219 transitions. Second operand has 5 states, 5 states have (on average 22.6) internal successors, (113), 4 states have internal predecessors, (113), 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 08:18:47,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:18:47,716 INFO L93 Difference]: Finished difference Result 1860 states and 2608 transitions. [2022-01-10 08:18:47,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 08:18:47,717 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.6) internal successors, (113), 4 states have internal predecessors, (113), 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 124 [2022-01-10 08:18:47,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:18:47,719 INFO L225 Difference]: With dead ends: 1860 [2022-01-10 08:18:47,720 INFO L226 Difference]: Without dead ends: 999 [2022-01-10 08:18:47,721 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 120 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 08:18:47,721 INFO L933 BasicCegarLoop]: 347 mSDtfsCounter, 545 mSDsluCounter, 398 mSDsCounter, 0 mSdLazyCounter, 284 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 560 SdHoareTripleChecker+Valid, 745 SdHoareTripleChecker+Invalid, 319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 08:18:47,721 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [560 Valid, 745 Invalid, 319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 284 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 08:18:47,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 999 states. [2022-01-10 08:18:47,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 999 to 999. [2022-01-10 08:18:47,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 999 states, 922 states have (on average 1.380694143167028) internal successors, (1273), 925 states have internal predecessors, (1273), 47 states have call successors, (47), 29 states have call predecessors, (47), 29 states have return successors, (46), 45 states have call predecessors, (46), 45 states have call successors, (46) [2022-01-10 08:18:47,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 999 states to 999 states and 1366 transitions. [2022-01-10 08:18:47,774 INFO L78 Accepts]: Start accepts. Automaton has 999 states and 1366 transitions. Word has length 124 [2022-01-10 08:18:47,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:18:47,775 INFO L470 AbstractCegarLoop]: Abstraction has 999 states and 1366 transitions. [2022-01-10 08:18:47,775 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.6) internal successors, (113), 4 states have internal predecessors, (113), 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 08:18:47,775 INFO L276 IsEmpty]: Start isEmpty. Operand 999 states and 1366 transitions. [2022-01-10 08:18:47,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-01-10 08:18:47,776 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:18:47,776 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] [2022-01-10 08:18:47,785 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 08:18:47,983 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 08:18:47,983 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:18:47,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:18:47,983 INFO L85 PathProgramCache]: Analyzing trace with hash 1089402786, now seen corresponding path program 1 times [2022-01-10 08:18:47,984 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:18:47,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2126542214] [2022-01-10 08:18:47,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:18:47,984 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:18:47,984 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:18:47,985 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 08:18:47,985 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 08:18:48,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:18:48,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:18:48,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:18:48,207 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 08:18:48,207 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:18:48,207 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:18:48,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2126542214] [2022-01-10 08:18:48,208 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2126542214] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:18:48,208 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:18:48,208 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 08:18:48,208 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547281581] [2022-01-10 08:18:48,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:18:48,208 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:18:48,208 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:18:48,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:18:48,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:18:48,209 INFO L87 Difference]: Start difference. First operand 999 states and 1366 transitions. Second operand has 5 states, 5 states have (on average 22.6) internal successors, (113), 4 states have internal predecessors, (113), 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 08:18:48,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:18:48,502 INFO L93 Difference]: Finished difference Result 2104 states and 2902 transitions. [2022-01-10 08:18:48,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 08:18:48,503 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.6) internal successors, (113), 4 states have internal predecessors, (113), 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 124 [2022-01-10 08:18:48,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:18:48,506 INFO L225 Difference]: With dead ends: 2104 [2022-01-10 08:18:48,506 INFO L226 Difference]: Without dead ends: 1121 [2022-01-10 08:18:48,507 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 120 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 08:18:48,508 INFO L933 BasicCegarLoop]: 344 mSDtfsCounter, 538 mSDsluCounter, 394 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 553 SdHoareTripleChecker+Valid, 738 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 08:18:48,508 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [553 Valid, 738 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 08:18:48,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1121 states. [2022-01-10 08:18:48,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1121 to 1121. [2022-01-10 08:18:48,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1121 states, 1038 states have (on average 1.3603082851637764) internal successors, (1412), 1041 states have internal predecessors, (1412), 49 states have call successors, (49), 33 states have call predecessors, (49), 33 states have return successors, (48), 47 states have call predecessors, (48), 47 states have call successors, (48) [2022-01-10 08:18:48,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1121 states to 1121 states and 1509 transitions. [2022-01-10 08:18:48,551 INFO L78 Accepts]: Start accepts. Automaton has 1121 states and 1509 transitions. Word has length 124 [2022-01-10 08:18:48,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:18:48,551 INFO L470 AbstractCegarLoop]: Abstraction has 1121 states and 1509 transitions. [2022-01-10 08:18:48,552 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.6) internal successors, (113), 4 states have internal predecessors, (113), 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 08:18:48,552 INFO L276 IsEmpty]: Start isEmpty. Operand 1121 states and 1509 transitions. [2022-01-10 08:18:48,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-01-10 08:18:48,553 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:18:48,553 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] [2022-01-10 08:18:48,565 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 08:18:48,760 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 08:18:48,760 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:18:48,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:18:48,760 INFO L85 PathProgramCache]: Analyzing trace with hash -1591793979, now seen corresponding path program 1 times [2022-01-10 08:18:48,761 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:18:48,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [626822675] [2022-01-10 08:18:48,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:18:48,761 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:18:48,761 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:18:48,763 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 08:18:48,763 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 08:18:48,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:18:48,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:18:48,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:18:49,019 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 08:18:49,019 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:18:49,019 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:18:49,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [626822675] [2022-01-10 08:18:49,020 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [626822675] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:18:49,020 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:18:49,020 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 08:18:49,020 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415333593] [2022-01-10 08:18:49,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:18:49,020 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:18:49,020 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:18:49,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:18:49,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:18:49,021 INFO L87 Difference]: Start difference. First operand 1121 states and 1509 transitions. Second operand has 5 states, 5 states have (on average 22.6) internal successors, (113), 4 states have internal predecessors, (113), 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 08:18:49,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:18:49,339 INFO L93 Difference]: Finished difference Result 2348 states and 3188 transitions. [2022-01-10 08:18:49,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 08:18:49,339 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.6) internal successors, (113), 4 states have internal predecessors, (113), 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 124 [2022-01-10 08:18:49,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:18:49,343 INFO L225 Difference]: With dead ends: 2348 [2022-01-10 08:18:49,343 INFO L226 Difference]: Without dead ends: 1243 [2022-01-10 08:18:49,344 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 120 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 08:18:49,345 INFO L933 BasicCegarLoop]: 341 mSDtfsCounter, 531 mSDsluCounter, 390 mSDsCounter, 0 mSdLazyCounter, 282 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 546 SdHoareTripleChecker+Valid, 731 SdHoareTripleChecker+Invalid, 317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 08:18:49,345 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [546 Valid, 731 Invalid, 317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 282 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 08:18:49,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1243 states. [2022-01-10 08:18:49,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1243 to 1243. [2022-01-10 08:18:49,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1243 states, 1154 states have (on average 1.3405545927209706) internal successors, (1547), 1157 states have internal predecessors, (1547), 51 states have call successors, (51), 37 states have call predecessors, (51), 37 states have return successors, (50), 49 states have call predecessors, (50), 49 states have call successors, (50) [2022-01-10 08:18:49,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1243 states to 1243 states and 1648 transitions. [2022-01-10 08:18:49,392 INFO L78 Accepts]: Start accepts. Automaton has 1243 states and 1648 transitions. Word has length 124 [2022-01-10 08:18:49,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:18:49,392 INFO L470 AbstractCegarLoop]: Abstraction has 1243 states and 1648 transitions. [2022-01-10 08:18:49,392 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.6) internal successors, (113), 4 states have internal predecessors, (113), 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 08:18:49,392 INFO L276 IsEmpty]: Start isEmpty. Operand 1243 states and 1648 transitions. [2022-01-10 08:18:49,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-01-10 08:18:49,393 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:18:49,393 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] [2022-01-10 08:18:49,404 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 08:18:49,601 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 08:18:49,601 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:18:49,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:18:49,601 INFO L85 PathProgramCache]: Analyzing trace with hash -1401439551, now seen corresponding path program 1 times [2022-01-10 08:18:49,601 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:18:49,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2129994292] [2022-01-10 08:18:49,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:18:49,602 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:18:49,602 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:18:49,603 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 08:18:49,604 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 08:18:49,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:18:49,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:18:49,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:18:49,831 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 08:18:49,831 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:18:49,831 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:18:49,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2129994292] [2022-01-10 08:18:49,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2129994292] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:18:49,831 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:18:49,832 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 08:18:49,832 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194990720] [2022-01-10 08:18:49,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:18:49,832 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:18:49,832 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:18:49,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:18:49,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:18:49,832 INFO L87 Difference]: Start difference. First operand 1243 states and 1648 transitions. Second operand has 5 states, 5 states have (on average 22.6) internal successors, (113), 4 states have internal predecessors, (113), 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 08:18:50,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:18:50,159 INFO L93 Difference]: Finished difference Result 2592 states and 3466 transitions. [2022-01-10 08:18:50,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 08:18:50,159 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.6) internal successors, (113), 4 states have internal predecessors, (113), 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 124 [2022-01-10 08:18:50,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:18:50,163 INFO L225 Difference]: With dead ends: 2592 [2022-01-10 08:18:50,163 INFO L226 Difference]: Without dead ends: 1365 [2022-01-10 08:18:50,165 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 120 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 08:18:50,165 INFO L933 BasicCegarLoop]: 338 mSDtfsCounter, 524 mSDsluCounter, 386 mSDsCounter, 0 mSdLazyCounter, 281 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 539 SdHoareTripleChecker+Valid, 724 SdHoareTripleChecker+Invalid, 316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 08:18:50,165 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [539 Valid, 724 Invalid, 316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 281 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 08:18:50,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1365 states. [2022-01-10 08:18:50,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1365 to 1365. [2022-01-10 08:18:50,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1365 states, 1270 states have (on average 1.321259842519685) internal successors, (1678), 1273 states have internal predecessors, (1678), 53 states have call successors, (53), 41 states have call predecessors, (53), 41 states have return successors, (52), 51 states have call predecessors, (52), 51 states have call successors, (52) [2022-01-10 08:18:50,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1365 states to 1365 states and 1783 transitions. [2022-01-10 08:18:50,221 INFO L78 Accepts]: Start accepts. Automaton has 1365 states and 1783 transitions. Word has length 124 [2022-01-10 08:18:50,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:18:50,221 INFO L470 AbstractCegarLoop]: Abstraction has 1365 states and 1783 transitions. [2022-01-10 08:18:50,221 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.6) internal successors, (113), 4 states have internal predecessors, (113), 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 08:18:50,221 INFO L276 IsEmpty]: Start isEmpty. Operand 1365 states and 1783 transitions. [2022-01-10 08:18:50,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-01-10 08:18:50,221 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:18:50,222 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] [2022-01-10 08:18:50,235 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 08:18:50,429 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 08:18:50,429 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:18:50,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:18:50,429 INFO L85 PathProgramCache]: Analyzing trace with hash 100544868, now seen corresponding path program 1 times [2022-01-10 08:18:50,429 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:18:50,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1785876786] [2022-01-10 08:18:50,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:18:50,430 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:18:50,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:18:50,431 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 08:18:50,431 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 08:18:50,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:18:50,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:18:50,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:18:50,668 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 08:18:50,668 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:18:50,668 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:18:50,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1785876786] [2022-01-10 08:18:50,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1785876786] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:18:50,668 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:18:50,668 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 08:18:50,668 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427432583] [2022-01-10 08:18:50,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:18:50,669 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:18:50,669 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:18:50,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:18:50,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:18:50,669 INFO L87 Difference]: Start difference. First operand 1365 states and 1783 transitions. Second operand has 5 states, 5 states have (on average 22.6) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:18:50,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:18:50,743 INFO L93 Difference]: Finished difference Result 2923 states and 3847 transitions. [2022-01-10 08:18:50,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 08:18:50,743 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.6) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 124 [2022-01-10 08:18:50,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:18:50,747 INFO L225 Difference]: With dead ends: 2923 [2022-01-10 08:18:50,747 INFO L226 Difference]: Without dead ends: 1575 [2022-01-10 08:18:50,749 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 120 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 08:18:50,750 INFO L933 BasicCegarLoop]: 360 mSDtfsCounter, 284 mSDsluCounter, 1189 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 284 SdHoareTripleChecker+Valid, 1549 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 08:18:50,750 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [284 Valid, 1549 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:18:50,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1575 states. [2022-01-10 08:18:50,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1575 to 1371. [2022-01-10 08:18:50,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1371 states, 1276 states have (on average 1.3087774294670846) internal successors, (1670), 1279 states have internal predecessors, (1670), 53 states have call successors, (53), 41 states have call predecessors, (53), 41 states have return successors, (52), 51 states have call predecessors, (52), 51 states have call successors, (52) [2022-01-10 08:18:50,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1371 states to 1371 states and 1775 transitions. [2022-01-10 08:18:50,809 INFO L78 Accepts]: Start accepts. Automaton has 1371 states and 1775 transitions. Word has length 124 [2022-01-10 08:18:50,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:18:50,809 INFO L470 AbstractCegarLoop]: Abstraction has 1371 states and 1775 transitions. [2022-01-10 08:18:50,809 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.6) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:18:50,809 INFO L276 IsEmpty]: Start isEmpty. Operand 1371 states and 1775 transitions. [2022-01-10 08:18:50,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-01-10 08:18:50,810 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:18:50,810 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] [2022-01-10 08:18:50,826 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 08:18:51,017 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 08:18:51,018 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:18:51,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:18:51,018 INFO L85 PathProgramCache]: Analyzing trace with hash 1667302818, now seen corresponding path program 1 times [2022-01-10 08:18:51,018 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:18:51,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1772703306] [2022-01-10 08:18:51,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:18:51,019 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:18:51,019 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:18:51,020 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 08:18:51,021 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 08:18:51,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:18:51,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:18:51,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:18:51,268 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 08:18:51,268 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:18:51,268 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:18:51,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1772703306] [2022-01-10 08:18:51,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1772703306] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:18:51,269 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:18:51,269 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 08:18:51,269 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877105537] [2022-01-10 08:18:51,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:18:51,269 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:18:51,269 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:18:51,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:18:51,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:18:51,270 INFO L87 Difference]: Start difference. First operand 1371 states and 1775 transitions. Second operand has 5 states, 5 states have (on average 22.6) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:18:51,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:18:51,354 INFO L93 Difference]: Finished difference Result 2907 states and 3795 transitions. [2022-01-10 08:18:51,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 08:18:51,354 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.6) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 124 [2022-01-10 08:18:51,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:18:51,359 INFO L225 Difference]: With dead ends: 2907 [2022-01-10 08:18:51,359 INFO L226 Difference]: Without dead ends: 1553 [2022-01-10 08:18:51,362 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 120 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 08:18:51,362 INFO L933 BasicCegarLoop]: 360 mSDtfsCounter, 245 mSDsluCounter, 1174 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 245 SdHoareTripleChecker+Valid, 1534 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 08:18:51,363 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [245 Valid, 1534 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:18:51,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1553 states. [2022-01-10 08:18:51,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1553 to 1377. [2022-01-10 08:18:51,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1377 states, 1282 states have (on average 1.296411856474259) internal successors, (1662), 1285 states have internal predecessors, (1662), 53 states have call successors, (53), 41 states have call predecessors, (53), 41 states have return successors, (52), 51 states have call predecessors, (52), 51 states have call successors, (52) [2022-01-10 08:18:51,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1377 states to 1377 states and 1767 transitions. [2022-01-10 08:18:51,426 INFO L78 Accepts]: Start accepts. Automaton has 1377 states and 1767 transitions. Word has length 124 [2022-01-10 08:18:51,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:18:51,426 INFO L470 AbstractCegarLoop]: Abstraction has 1377 states and 1767 transitions. [2022-01-10 08:18:51,427 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.6) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:18:51,427 INFO L276 IsEmpty]: Start isEmpty. Operand 1377 states and 1767 transitions. [2022-01-10 08:18:51,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-01-10 08:18:51,427 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:18:51,427 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] [2022-01-10 08:18:51,442 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 08:18:51,634 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 08:18:51,634 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:18:51,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:18:51,635 INFO L85 PathProgramCache]: Analyzing trace with hash -410034080, now seen corresponding path program 1 times [2022-01-10 08:18:51,635 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:18:51,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [808802039] [2022-01-10 08:18:51,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:18:51,635 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:18:51,635 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:18:51,636 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 08:18:51,638 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 08:18:51,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:18:51,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:18:51,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:18:51,874 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 08:18:51,874 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:18:51,874 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:18:51,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [808802039] [2022-01-10 08:18:51,875 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [808802039] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:18:51,875 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:18:51,875 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 08:18:51,875 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337293630] [2022-01-10 08:18:51,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:18:51,875 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:18:51,875 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:18:51,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:18:51,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:18:51,876 INFO L87 Difference]: Start difference. First operand 1377 states and 1767 transitions. Second operand has 5 states, 5 states have (on average 22.6) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:18:51,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:18:51,959 INFO L93 Difference]: Finished difference Result 2891 states and 3743 transitions. [2022-01-10 08:18:51,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 08:18:51,960 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.6) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 124 [2022-01-10 08:18:51,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:18:51,964 INFO L225 Difference]: With dead ends: 2891 [2022-01-10 08:18:51,964 INFO L226 Difference]: Without dead ends: 1531 [2022-01-10 08:18:51,966 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 120 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 08:18:51,966 INFO L933 BasicCegarLoop]: 360 mSDtfsCounter, 206 mSDsluCounter, 1159 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 1519 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 08:18:51,966 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [206 Valid, 1519 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:18:51,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1531 states. [2022-01-10 08:18:52,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1531 to 1383. [2022-01-10 08:18:52,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1383 states, 1288 states have (on average 1.2841614906832297) internal successors, (1654), 1291 states have internal predecessors, (1654), 53 states have call successors, (53), 41 states have call predecessors, (53), 41 states have return successors, (52), 51 states have call predecessors, (52), 51 states have call successors, (52) [2022-01-10 08:18:52,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1383 states to 1383 states and 1759 transitions. [2022-01-10 08:18:52,055 INFO L78 Accepts]: Start accepts. Automaton has 1383 states and 1759 transitions. Word has length 124 [2022-01-10 08:18:52,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:18:52,055 INFO L470 AbstractCegarLoop]: Abstraction has 1383 states and 1759 transitions. [2022-01-10 08:18:52,055 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.6) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:18:52,055 INFO L276 IsEmpty]: Start isEmpty. Operand 1383 states and 1759 transitions. [2022-01-10 08:18:52,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-01-10 08:18:52,056 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:18:52,056 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] [2022-01-10 08:18:52,071 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 08:18:52,264 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 08:18:52,264 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:18:52,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:18:52,264 INFO L85 PathProgramCache]: Analyzing trace with hash 1498423710, now seen corresponding path program 1 times [2022-01-10 08:18:52,265 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:18:52,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [732709379] [2022-01-10 08:18:52,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:18:52,265 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:18:52,265 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:18:52,266 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 08:18:52,267 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 08:18:52,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:18:52,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:18:52,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:18:52,487 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 08:18:52,487 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:18:52,488 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:18:52,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [732709379] [2022-01-10 08:18:52,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [732709379] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:18:52,488 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:18:52,488 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 08:18:52,488 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307640532] [2022-01-10 08:18:52,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:18:52,489 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:18:52,489 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:18:52,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:18:52,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:18:52,490 INFO L87 Difference]: Start difference. First operand 1383 states and 1759 transitions. Second operand has 5 states, 5 states have (on average 22.6) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:18:52,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:18:52,636 INFO L93 Difference]: Finished difference Result 3757 states and 4831 transitions. [2022-01-10 08:18:52,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 08:18:52,636 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.6) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 124 [2022-01-10 08:18:52,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:18:52,644 INFO L225 Difference]: With dead ends: 3757 [2022-01-10 08:18:52,644 INFO L226 Difference]: Without dead ends: 2391 [2022-01-10 08:18:52,647 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 120 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 08:18:52,649 INFO L933 BasicCegarLoop]: 360 mSDtfsCounter, 170 mSDsluCounter, 1159 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 1519 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 08:18:52,650 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [170 Valid, 1519 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:18:52,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2391 states. [2022-01-10 08:18:52,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2391 to 1431. [2022-01-10 08:18:52,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1431 states, 1336 states have (on average 1.2739520958083832) internal successors, (1702), 1339 states have internal predecessors, (1702), 53 states have call successors, (53), 41 states have call predecessors, (53), 41 states have return successors, (52), 51 states have call predecessors, (52), 51 states have call successors, (52) [2022-01-10 08:18:52,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1431 states to 1431 states and 1807 transitions. [2022-01-10 08:18:52,748 INFO L78 Accepts]: Start accepts. Automaton has 1431 states and 1807 transitions. Word has length 124 [2022-01-10 08:18:52,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:18:52,748 INFO L470 AbstractCegarLoop]: Abstraction has 1431 states and 1807 transitions. [2022-01-10 08:18:52,748 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.6) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:18:52,748 INFO L276 IsEmpty]: Start isEmpty. Operand 1431 states and 1807 transitions. [2022-01-10 08:18:52,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-01-10 08:18:52,750 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:18:52,750 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] [2022-01-10 08:18:52,757 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (33)] Ended with exit code 0 [2022-01-10 08:18:52,957 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 08:18:52,957 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:18:52,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:18:52,958 INFO L85 PathProgramCache]: Analyzing trace with hash 1444030812, now seen corresponding path program 1 times [2022-01-10 08:18:52,958 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:18:52,958 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [145068553] [2022-01-10 08:18:52,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:18:52,958 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:18:52,958 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:18:52,959 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 08:18:52,960 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 08:18:53,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:18:53,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:18:53,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:18:53,170 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 08:18:53,170 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:18:53,170 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:18:53,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [145068553] [2022-01-10 08:18:53,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [145068553] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:18:53,170 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:18:53,170 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 08:18:53,170 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692957877] [2022-01-10 08:18:53,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:18:53,171 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:18:53,171 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:18:53,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:18:53,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:18:53,171 INFO L87 Difference]: Start difference. First operand 1431 states and 1807 transitions. Second operand has 5 states, 5 states have (on average 22.6) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:18:53,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:18:53,285 INFO L93 Difference]: Finished difference Result 2943 states and 3747 transitions. [2022-01-10 08:18:53,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 08:18:53,285 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.6) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 124 [2022-01-10 08:18:53,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:18:53,288 INFO L225 Difference]: With dead ends: 2943 [2022-01-10 08:18:53,289 INFO L226 Difference]: Without dead ends: 1529 [2022-01-10 08:18:53,291 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 120 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 08:18:53,291 INFO L933 BasicCegarLoop]: 360 mSDtfsCounter, 127 mSDsluCounter, 1124 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 1484 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 08:18:53,291 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 1484 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:18:53,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1529 states. [2022-01-10 08:18:53,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1529 to 1437. [2022-01-10 08:18:53,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1437 states, 1342 states have (on average 1.2622950819672132) internal successors, (1694), 1345 states have internal predecessors, (1694), 53 states have call successors, (53), 41 states have call predecessors, (53), 41 states have return successors, (52), 51 states have call predecessors, (52), 51 states have call successors, (52) [2022-01-10 08:18:53,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1437 states to 1437 states and 1799 transitions. [2022-01-10 08:18:53,388 INFO L78 Accepts]: Start accepts. Automaton has 1437 states and 1799 transitions. Word has length 124 [2022-01-10 08:18:53,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:18:53,388 INFO L470 AbstractCegarLoop]: Abstraction has 1437 states and 1799 transitions. [2022-01-10 08:18:53,388 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.6) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:18:53,388 INFO L276 IsEmpty]: Start isEmpty. Operand 1437 states and 1799 transitions. [2022-01-10 08:18:53,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-01-10 08:18:53,389 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:18:53,389 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] [2022-01-10 08:18:53,398 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2022-01-10 08:18:53,596 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 08:18:53,596 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:18:53,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:18:53,597 INFO L85 PathProgramCache]: Analyzing trace with hash 1877759898, now seen corresponding path program 1 times [2022-01-10 08:18:53,597 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:18:53,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [462868287] [2022-01-10 08:18:53,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:18:53,597 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:18:53,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:18:53,598 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 08:18:53,600 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 08:18:53,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:18:53,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:18:53,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:18:53,830 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 08:18:53,830 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:18:53,831 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:18:53,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [462868287] [2022-01-10 08:18:53,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [462868287] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:18:53,831 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:18:53,831 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 08:18:53,831 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282635695] [2022-01-10 08:18:53,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:18:53,831 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:18:53,831 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:18:53,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:18:53,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:18:53,832 INFO L87 Difference]: Start difference. First operand 1437 states and 1799 transitions. Second operand has 5 states, 5 states have (on average 22.6) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:18:53,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:18:53,944 INFO L93 Difference]: Finished difference Result 2927 states and 3695 transitions. [2022-01-10 08:18:53,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 08:18:53,944 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.6) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 124 [2022-01-10 08:18:53,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:18:53,947 INFO L225 Difference]: With dead ends: 2927 [2022-01-10 08:18:53,947 INFO L226 Difference]: Without dead ends: 1507 [2022-01-10 08:18:53,949 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 120 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 08:18:53,949 INFO L933 BasicCegarLoop]: 360 mSDtfsCounter, 88 mSDsluCounter, 1109 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 1469 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 08:18:53,949 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 1469 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:18:53,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1507 states. [2022-01-10 08:18:54,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1507 to 1443. [2022-01-10 08:18:54,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1443 states, 1348 states have (on average 1.2507418397626113) internal successors, (1686), 1351 states have internal predecessors, (1686), 53 states have call successors, (53), 41 states have call predecessors, (53), 41 states have return successors, (52), 51 states have call predecessors, (52), 51 states have call successors, (52) [2022-01-10 08:18:54,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1443 states to 1443 states and 1791 transitions. [2022-01-10 08:18:54,044 INFO L78 Accepts]: Start accepts. Automaton has 1443 states and 1791 transitions. Word has length 124 [2022-01-10 08:18:54,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:18:54,044 INFO L470 AbstractCegarLoop]: Abstraction has 1443 states and 1791 transitions. [2022-01-10 08:18:54,044 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.6) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:18:54,044 INFO L276 IsEmpty]: Start isEmpty. Operand 1443 states and 1791 transitions. [2022-01-10 08:18:54,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-01-10 08:18:54,045 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:18:54,045 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] [2022-01-10 08:18:54,065 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 08:18:54,252 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 08:18:54,252 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:18:54,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:18:54,253 INFO L85 PathProgramCache]: Analyzing trace with hash -878867368, now seen corresponding path program 1 times [2022-01-10 08:18:54,253 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:18:54,253 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [747055563] [2022-01-10 08:18:54,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:18:54,253 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:18:54,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:18:54,254 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 08:18:54,256 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 08:18:54,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:18:54,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:18:54,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:18:54,455 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 08:18:54,455 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:18:54,455 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:18:54,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [747055563] [2022-01-10 08:18:54,456 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [747055563] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:18:54,456 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:18:54,456 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 08:18:54,456 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977547380] [2022-01-10 08:18:54,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:18:54,457 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:18:54,457 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:18:54,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:18:54,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:18:54,457 INFO L87 Difference]: Start difference. First operand 1443 states and 1791 transitions. Second operand has 5 states, 5 states have (on average 22.6) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:18:54,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:18:54,555 INFO L93 Difference]: Finished difference Result 2883 states and 3607 transitions. [2022-01-10 08:18:54,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 08:18:54,556 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.6) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 124 [2022-01-10 08:18:54,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:18:54,559 INFO L225 Difference]: With dead ends: 2883 [2022-01-10 08:18:54,559 INFO L226 Difference]: Without dead ends: 1457 [2022-01-10 08:18:54,561 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 120 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 08:18:54,561 INFO L933 BasicCegarLoop]: 360 mSDtfsCounter, 10 mSDsluCounter, 1079 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 1439 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 08:18:54,561 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 1439 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:18:54,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1457 states. [2022-01-10 08:18:54,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1457 to 1449. [2022-01-10 08:18:54,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1449 states, 1354 states have (on average 1.239290989660266) internal successors, (1678), 1357 states have internal predecessors, (1678), 53 states have call successors, (53), 41 states have call predecessors, (53), 41 states have return successors, (52), 51 states have call predecessors, (52), 51 states have call successors, (52) [2022-01-10 08:18:54,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1449 states to 1449 states and 1783 transitions. [2022-01-10 08:18:54,667 INFO L78 Accepts]: Start accepts. Automaton has 1449 states and 1783 transitions. Word has length 124 [2022-01-10 08:18:54,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:18:54,667 INFO L470 AbstractCegarLoop]: Abstraction has 1449 states and 1783 transitions. [2022-01-10 08:18:54,667 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.6) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:18:54,667 INFO L276 IsEmpty]: Start isEmpty. Operand 1449 states and 1783 transitions. [2022-01-10 08:18:54,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-01-10 08:18:54,668 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:18:54,668 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] [2022-01-10 08:18:54,677 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 08:18:54,879 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 08:18:54,879 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:18:54,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:18:54,880 INFO L85 PathProgramCache]: Analyzing trace with hash 2044292630, now seen corresponding path program 1 times [2022-01-10 08:18:54,880 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:18:54,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1502127711] [2022-01-10 08:18:54,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:18:54,880 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:18:54,880 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:18:54,881 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 08:18:54,882 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 08:18:54,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:18:54,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-10 08:18:54,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:18:55,162 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 08:18:55,162 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:18:55,162 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:18:55,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1502127711] [2022-01-10 08:18:55,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1502127711] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:18:55,163 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:18:55,163 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 08:18:55,163 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066944882] [2022-01-10 08:18:55,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:18:55,163 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:18:55,163 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:18:55,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:18:55,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:18:55,164 INFO L87 Difference]: Start difference. First operand 1449 states and 1783 transitions. Second operand has 5 states, 5 states have (on average 22.6) internal successors, (113), 4 states have internal predecessors, (113), 2 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:18:55,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:18:55,428 INFO L93 Difference]: Finished difference Result 2882 states and 3548 transitions. [2022-01-10 08:18:55,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 08:18:55,429 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.6) internal successors, (113), 4 states have internal predecessors, (113), 2 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 124 [2022-01-10 08:18:55,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:18:55,441 INFO L225 Difference]: With dead ends: 2882 [2022-01-10 08:18:55,441 INFO L226 Difference]: Without dead ends: 1449 [2022-01-10 08:18:55,443 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 120 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 08:18:55,443 INFO L933 BasicCegarLoop]: 336 mSDtfsCounter, 393 mSDsluCounter, 383 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 407 SdHoareTripleChecker+Valid, 719 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 08:18:55,443 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [407 Valid, 719 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 08:18:55,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1449 states. [2022-01-10 08:18:55,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1449 to 1449. [2022-01-10 08:18:55,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1449 states, 1354 states have (on average 1.2341211225997046) internal successors, (1671), 1357 states have internal predecessors, (1671), 53 states have call successors, (53), 41 states have call predecessors, (53), 41 states have return successors, (52), 51 states have call predecessors, (52), 51 states have call successors, (52) [2022-01-10 08:18:55,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1449 states to 1449 states and 1776 transitions. [2022-01-10 08:18:55,528 INFO L78 Accepts]: Start accepts. Automaton has 1449 states and 1776 transitions. Word has length 124 [2022-01-10 08:18:55,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:18:55,528 INFO L470 AbstractCegarLoop]: Abstraction has 1449 states and 1776 transitions. [2022-01-10 08:18:55,528 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.6) internal successors, (113), 4 states have internal predecessors, (113), 2 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:18:55,528 INFO L276 IsEmpty]: Start isEmpty. Operand 1449 states and 1776 transitions. [2022-01-10 08:18:55,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-01-10 08:18:55,529 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:18:55,529 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] [2022-01-10 08:18:55,541 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 08:18:55,736 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 08:18:55,736 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:18:55,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:18:55,737 INFO L85 PathProgramCache]: Analyzing trace with hash 1971906072, now seen corresponding path program 1 times [2022-01-10 08:18:55,737 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:18:55,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1421240726] [2022-01-10 08:18:55,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:18:55,737 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:18:55,737 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:18:55,738 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 08:18:55,738 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 08:18:55,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:18:55,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-10 08:18:55,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:18:56,014 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 08:18:56,014 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:18:56,015 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:18:56,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1421240726] [2022-01-10 08:18:56,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1421240726] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:18:56,015 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:18:56,015 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 08:18:56,015 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53283406] [2022-01-10 08:18:56,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:18:56,015 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:18:56,015 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:18:56,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:18:56,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:18:56,016 INFO L87 Difference]: Start difference. First operand 1449 states and 1776 transitions. Second operand has 5 states, 5 states have (on average 22.6) internal successors, (113), 4 states have internal predecessors, (113), 2 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:18:56,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:18:56,428 INFO L93 Difference]: Finished difference Result 3020 states and 3718 transitions. [2022-01-10 08:18:56,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 08:18:56,432 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.6) internal successors, (113), 4 states have internal predecessors, (113), 2 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 124 [2022-01-10 08:18:56,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:18:56,436 INFO L225 Difference]: With dead ends: 3020 [2022-01-10 08:18:56,436 INFO L226 Difference]: Without dead ends: 1587 [2022-01-10 08:18:56,438 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 120 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 08:18:56,439 INFO L933 BasicCegarLoop]: 371 mSDtfsCounter, 481 mSDsluCounter, 378 mSDsCounter, 0 mSdLazyCounter, 315 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 495 SdHoareTripleChecker+Valid, 749 SdHoareTripleChecker+Invalid, 350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 315 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 08:18:56,439 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [495 Valid, 749 Invalid, 350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 315 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 08:18:56,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1587 states. [2022-01-10 08:18:56,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1587 to 1523. [2022-01-10 08:18:56,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1523 states, 1426 states have (on average 1.2103786816269284) internal successors, (1726), 1429 states have internal predecessors, (1726), 53 states have call successors, (53), 43 states have call predecessors, (53), 43 states have return successors, (52), 51 states have call predecessors, (52), 51 states have call successors, (52) [2022-01-10 08:18:56,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1523 states to 1523 states and 1831 transitions. [2022-01-10 08:18:56,532 INFO L78 Accepts]: Start accepts. Automaton has 1523 states and 1831 transitions. Word has length 124 [2022-01-10 08:18:56,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:18:56,532 INFO L470 AbstractCegarLoop]: Abstraction has 1523 states and 1831 transitions. [2022-01-10 08:18:56,532 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.6) internal successors, (113), 4 states have internal predecessors, (113), 2 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:18:56,532 INFO L276 IsEmpty]: Start isEmpty. Operand 1523 states and 1831 transitions. [2022-01-10 08:18:56,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-01-10 08:18:56,533 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:18:56,533 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] [2022-01-10 08:18:56,541 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 08:18:56,739 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 08:18:56,740 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:18:56,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:18:56,740 INFO L85 PathProgramCache]: Analyzing trace with hash 2112454682, now seen corresponding path program 1 times [2022-01-10 08:18:56,741 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:18:56,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2127721295] [2022-01-10 08:18:56,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:18:56,741 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:18:56,741 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:18:56,742 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 08:18:56,742 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 08:18:56,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:18:56,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 08:18:56,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:18:56,983 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 08:18:56,984 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:18:56,984 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:18:56,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2127721295] [2022-01-10 08:18:56,984 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2127721295] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:18:56,984 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:18:56,984 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 08:18:56,984 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538501951] [2022-01-10 08:18:56,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:18:56,984 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 08:18:56,984 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:18:56,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 08:18:56,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:18:56,985 INFO L87 Difference]: Start difference. First operand 1523 states and 1831 transitions. Second operand has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 2 states have internal predecessors, (113), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-01-10 08:18:57,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:18:57,177 INFO L93 Difference]: Finished difference Result 4490 states and 5412 transitions. [2022-01-10 08:18:57,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 08:18:57,177 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 2 states have internal predecessors, (113), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 124 [2022-01-10 08:18:57,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:18:57,182 INFO L225 Difference]: With dead ends: 4490 [2022-01-10 08:18:57,182 INFO L226 Difference]: Without dead ends: 2984 [2022-01-10 08:18:57,185 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 122 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 08:18:57,185 INFO L933 BasicCegarLoop]: 411 mSDtfsCounter, 214 mSDsluCounter, 321 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 732 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 08:18:57,186 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [214 Valid, 732 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:18:57,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2984 states. [2022-01-10 08:18:57,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2984 to 2982. [2022-01-10 08:18:57,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2982 states, 2795 states have (on average 1.1985688729874777) internal successors, (3350), 2801 states have internal predecessors, (3350), 100 states have call successors, (100), 85 states have call predecessors, (100), 86 states have return successors, (100), 96 states have call predecessors, (100), 98 states have call successors, (100) [2022-01-10 08:18:57,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2982 states to 2982 states and 3550 transitions. [2022-01-10 08:18:57,377 INFO L78 Accepts]: Start accepts. Automaton has 2982 states and 3550 transitions. Word has length 124 [2022-01-10 08:18:57,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:18:57,378 INFO L470 AbstractCegarLoop]: Abstraction has 2982 states and 3550 transitions. [2022-01-10 08:18:57,378 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 2 states have internal predecessors, (113), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-01-10 08:18:57,378 INFO L276 IsEmpty]: Start isEmpty. Operand 2982 states and 3550 transitions. [2022-01-10 08:18:57,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2022-01-10 08:18:57,380 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:18:57,380 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:18:57,387 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 08:18:57,587 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 08:18:57,587 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:18:57,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:18:57,588 INFO L85 PathProgramCache]: Analyzing trace with hash 350605837, now seen corresponding path program 1 times [2022-01-10 08:18:57,588 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:18:57,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2024699621] [2022-01-10 08:18:57,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:18:57,588 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:18:57,588 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:18:57,589 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 08:18:57,623 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 08:18:57,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:18:57,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 418 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 08:18:57,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:18:58,013 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-01-10 08:18:58,013 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:18:58,013 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:18:58,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2024699621] [2022-01-10 08:18:58,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2024699621] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:18:58,013 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:18:58,013 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 08:18:58,013 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180470836] [2022-01-10 08:18:58,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:18:58,014 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 08:18:58,014 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:18:58,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 08:18:58,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 08:18:58,014 INFO L87 Difference]: Start difference. First operand 2982 states and 3550 transitions. Second operand has 4 states, 4 states have (on average 33.75) internal successors, (135), 4 states have internal predecessors, (135), 4 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-01-10 08:18:58,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:18:58,608 INFO L93 Difference]: Finished difference Result 8790 states and 10454 transitions. [2022-01-10 08:18:58,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 08:18:58,608 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.75) internal successors, (135), 4 states have internal predecessors, (135), 4 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 201 [2022-01-10 08:18:58,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:18:58,624 INFO L225 Difference]: With dead ends: 8790 [2022-01-10 08:18:58,625 INFO L226 Difference]: Without dead ends: 5826 [2022-01-10 08:18:58,629 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 199 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 08:18:58,630 INFO L933 BasicCegarLoop]: 509 mSDtfsCounter, 444 mSDsluCounter, 604 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 450 SdHoareTripleChecker+Valid, 1113 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 08:18:58,630 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [450 Valid, 1113 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 08:18:58,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5826 states. [2022-01-10 08:18:59,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5826 to 5822. [2022-01-10 08:18:59,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5822 states, 5460 states have (on average 1.1923076923076923) internal successors, (6510), 5475 states have internal predecessors, (6510), 189 states have call successors, (189), 161 states have call predecessors, (189), 172 states have return successors, (211), 187 states have call predecessors, (211), 187 states have call successors, (211) [2022-01-10 08:18:59,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5822 states to 5822 states and 6910 transitions. [2022-01-10 08:18:59,058 INFO L78 Accepts]: Start accepts. Automaton has 5822 states and 6910 transitions. Word has length 201 [2022-01-10 08:18:59,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:18:59,059 INFO L470 AbstractCegarLoop]: Abstraction has 5822 states and 6910 transitions. [2022-01-10 08:18:59,059 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.75) internal successors, (135), 4 states have internal predecessors, (135), 4 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-01-10 08:18:59,059 INFO L276 IsEmpty]: Start isEmpty. Operand 5822 states and 6910 transitions. [2022-01-10 08:18:59,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2022-01-10 08:18:59,062 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:18:59,062 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:18:59,072 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 08:18:59,273 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 08:18:59,274 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:18:59,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:18:59,276 INFO L85 PathProgramCache]: Analyzing trace with hash 837679563, now seen corresponding path program 1 times [2022-01-10 08:18:59,277 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:18:59,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1536642787] [2022-01-10 08:18:59,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:18:59,279 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:18:59,279 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:18:59,280 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 08:18:59,282 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 08:18:59,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:18:59,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 418 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 08:18:59,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:18:59,621 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2022-01-10 08:18:59,621 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:18:59,621 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:18:59,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1536642787] [2022-01-10 08:18:59,621 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1536642787] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:18:59,621 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:18:59,621 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 08:18:59,622 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125432420] [2022-01-10 08:18:59,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:18:59,622 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 08:18:59,622 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:18:59,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 08:18:59,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:18:59,623 INFO L87 Difference]: Start difference. First operand 5822 states and 6910 transitions. Second operand has 3 states, 3 states have (on average 42.0) internal successors, (126), 3 states have internal predecessors, (126), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-10 08:18:59,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:18:59,996 INFO L93 Difference]: Finished difference Result 11616 states and 13773 transitions. [2022-01-10 08:18:59,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 08:18:59,997 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.0) internal successors, (126), 3 states have internal predecessors, (126), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 201 [2022-01-10 08:18:59,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:19:00,010 INFO L225 Difference]: With dead ends: 11616 [2022-01-10 08:19:00,010 INFO L226 Difference]: Without dead ends: 5812 [2022-01-10 08:19:00,017 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 199 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 08:19:00,018 INFO L933 BasicCegarLoop]: 355 mSDtfsCounter, 347 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 347 SdHoareTripleChecker+Valid, 356 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 08:19:00,020 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [347 Valid, 356 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:19:00,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5812 states. [2022-01-10 08:19:00,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5812 to 5812. [2022-01-10 08:19:00,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5812 states, 5453 states have (on average 1.1914542453695214) internal successors, (6497), 5467 states have internal predecessors, (6497), 186 states have call successors, (186), 161 states have call predecessors, (186), 172 states have return successors, (208), 184 states have call predecessors, (208), 184 states have call successors, (208) [2022-01-10 08:19:00,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5812 states to 5812 states and 6891 transitions. [2022-01-10 08:19:00,467 INFO L78 Accepts]: Start accepts. Automaton has 5812 states and 6891 transitions. Word has length 201 [2022-01-10 08:19:00,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:19:00,467 INFO L470 AbstractCegarLoop]: Abstraction has 5812 states and 6891 transitions. [2022-01-10 08:19:00,467 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.0) internal successors, (126), 3 states have internal predecessors, (126), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-10 08:19:00,467 INFO L276 IsEmpty]: Start isEmpty. Operand 5812 states and 6891 transitions. [2022-01-10 08:19:00,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2022-01-10 08:19:00,470 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:19:00,470 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:19:00,477 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 08:19:00,672 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 08:19:00,672 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:19:00,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:19:00,672 INFO L85 PathProgramCache]: Analyzing trace with hash 608144950, now seen corresponding path program 1 times [2022-01-10 08:19:00,673 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:19:00,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1129480899] [2022-01-10 08:19:00,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:19:00,673 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:19:00,673 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:19:00,674 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 08:19:00,675 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 08:19:00,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:19:00,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 08:19:00,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:19:01,059 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-01-10 08:19:01,060 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:19:01,060 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:19:01,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1129480899] [2022-01-10 08:19:01,060 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1129480899] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:19:01,060 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:19:01,060 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 08:19:01,060 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964233910] [2022-01-10 08:19:01,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:19:01,060 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 08:19:01,061 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:19:01,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 08:19:01,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 08:19:01,061 INFO L87 Difference]: Start difference. First operand 5812 states and 6891 transitions. Second operand has 4 states, 4 states have (on average 34.0) internal successors, (136), 4 states have internal predecessors, (136), 4 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-01-10 08:19:01,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:19:01,998 INFO L93 Difference]: Finished difference Result 16965 states and 20109 transitions. [2022-01-10 08:19:01,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 08:19:01,998 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 34.0) internal successors, (136), 4 states have internal predecessors, (136), 4 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 202 [2022-01-10 08:19:01,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:19:02,017 INFO L225 Difference]: With dead ends: 16965 [2022-01-10 08:19:02,018 INFO L226 Difference]: Without dead ends: 11171 [2022-01-10 08:19:02,026 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 200 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 08:19:02,026 INFO L933 BasicCegarLoop]: 492 mSDtfsCounter, 439 mSDsluCounter, 581 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 445 SdHoareTripleChecker+Valid, 1073 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 08:19:02,026 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [445 Valid, 1073 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 08:19:02,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11171 states. [2022-01-10 08:19:02,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11171 to 11167. [2022-01-10 08:19:02,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11167 states, 10477 states have (on average 1.1880309248830772) internal successors, (12447), 10508 states have internal predecessors, (12447), 353 states have call successors, (353), 305 states have call predecessors, (353), 336 states have return successors, (419), 355 states have call predecessors, (419), 351 states have call successors, (419) [2022-01-10 08:19:02,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11167 states to 11167 states and 13219 transitions. [2022-01-10 08:19:02,908 INFO L78 Accepts]: Start accepts. Automaton has 11167 states and 13219 transitions. Word has length 202 [2022-01-10 08:19:02,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:19:02,909 INFO L470 AbstractCegarLoop]: Abstraction has 11167 states and 13219 transitions. [2022-01-10 08:19:02,909 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.0) internal successors, (136), 4 states have internal predecessors, (136), 4 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-01-10 08:19:02,909 INFO L276 IsEmpty]: Start isEmpty. Operand 11167 states and 13219 transitions. [2022-01-10 08:19:02,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2022-01-10 08:19:02,915 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:19:02,916 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:19:02,923 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 08:19:03,123 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 08:19:03,123 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:19:03,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:19:03,124 INFO L85 PathProgramCache]: Analyzing trace with hash 1095218676, now seen corresponding path program 1 times [2022-01-10 08:19:03,124 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:19:03,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [490375496] [2022-01-10 08:19:03,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:19:03,124 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:19:03,124 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:19:03,125 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 08:19:03,125 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 08:19:03,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:19:03,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 08:19:03,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:19:03,415 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2022-01-10 08:19:03,415 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:19:03,415 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:19:03,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [490375496] [2022-01-10 08:19:03,416 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [490375496] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:19:03,416 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:19:03,416 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 08:19:03,416 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952689559] [2022-01-10 08:19:03,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:19:03,416 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 08:19:03,416 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:19:03,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 08:19:03,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:19:03,417 INFO L87 Difference]: Start difference. First operand 11167 states and 13219 transitions. Second operand has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-10 08:19:04,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:19:04,186 INFO L93 Difference]: Finished difference Result 22307 states and 26394 transitions. [2022-01-10 08:19:04,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 08:19:04,186 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 202 [2022-01-10 08:19:04,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:19:04,207 INFO L225 Difference]: With dead ends: 22307 [2022-01-10 08:19:04,207 INFO L226 Difference]: Without dead ends: 11158 [2022-01-10 08:19:04,219 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 200 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 08:19:04,219 INFO L933 BasicCegarLoop]: 354 mSDtfsCounter, 345 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 345 SdHoareTripleChecker+Valid, 355 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 08:19:04,219 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [345 Valid, 355 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:19:04,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11158 states. [2022-01-10 08:19:05,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11158 to 11158. [2022-01-10 08:19:05,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11158 states, 10471 states have (on average 1.187661159392608) internal successors, (12436), 10501 states have internal predecessors, (12436), 350 states have call successors, (350), 305 states have call predecessors, (350), 336 states have return successors, (416), 352 states have call predecessors, (416), 348 states have call successors, (416) [2022-01-10 08:19:05,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11158 states to 11158 states and 13202 transitions. [2022-01-10 08:19:05,094 INFO L78 Accepts]: Start accepts. Automaton has 11158 states and 13202 transitions. Word has length 202 [2022-01-10 08:19:05,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:19:05,094 INFO L470 AbstractCegarLoop]: Abstraction has 11158 states and 13202 transitions. [2022-01-10 08:19:05,094 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-10 08:19:05,095 INFO L276 IsEmpty]: Start isEmpty. Operand 11158 states and 13202 transitions. [2022-01-10 08:19:05,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2022-01-10 08:19:05,106 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:19:05,107 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:19:05,114 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (43)] Ended with exit code 0 [2022-01-10 08:19:05,311 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 08:19:05,312 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:19:05,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:19:05,312 INFO L85 PathProgramCache]: Analyzing trace with hash -601715407, now seen corresponding path program 1 times [2022-01-10 08:19:05,312 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:19:05,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1666496153] [2022-01-10 08:19:05,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:19:05,313 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:19:05,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:19:05,314 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 08:19:05,315 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 08:19:05,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:19:05,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 422 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 08:19:05,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:19:05,763 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-01-10 08:19:05,763 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:19:05,763 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:19:05,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1666496153] [2022-01-10 08:19:05,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1666496153] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:19:05,764 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:19:05,764 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 08:19:05,764 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967980943] [2022-01-10 08:19:05,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:19:05,765 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 08:19:05,765 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:19:05,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 08:19:05,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 08:19:05,766 INFO L87 Difference]: Start difference. First operand 11158 states and 13202 transitions. Second operand has 4 states, 4 states have (on average 34.25) internal successors, (137), 4 states have internal predecessors, (137), 4 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-01-10 08:19:07,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:19:07,574 INFO L93 Difference]: Finished difference Result 32526 states and 38478 transitions. [2022-01-10 08:19:07,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 08:19:07,574 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 34.25) internal successors, (137), 4 states have internal predecessors, (137), 4 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 203 [2022-01-10 08:19:07,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:19:07,616 INFO L225 Difference]: With dead ends: 32526 [2022-01-10 08:19:07,617 INFO L226 Difference]: Without dead ends: 21386 [2022-01-10 08:19:07,634 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 201 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 08:19:07,635 INFO L933 BasicCegarLoop]: 480 mSDtfsCounter, 431 mSDsluCounter, 558 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 437 SdHoareTripleChecker+Valid, 1038 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 08:19:07,635 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [437 Valid, 1038 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 08:19:07,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21386 states. [2022-01-10 08:19:09,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21386 to 21382. [2022-01-10 08:19:09,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21382 states, 20060 states have (on average 1.1852442671984047) internal successors, (23776), 20127 states have internal predecessors, (23776), 665 states have call successors, (665), 577 states have call predecessors, (665), 656 states have return successors, (827), 679 states have call predecessors, (827), 663 states have call successors, (827) [2022-01-10 08:19:09,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21382 states to 21382 states and 25268 transitions. [2022-01-10 08:19:09,217 INFO L78 Accepts]: Start accepts. Automaton has 21382 states and 25268 transitions. Word has length 203 [2022-01-10 08:19:09,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:19:09,217 INFO L470 AbstractCegarLoop]: Abstraction has 21382 states and 25268 transitions. [2022-01-10 08:19:09,217 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.25) internal successors, (137), 4 states have internal predecessors, (137), 4 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-01-10 08:19:09,218 INFO L276 IsEmpty]: Start isEmpty. Operand 21382 states and 25268 transitions. [2022-01-10 08:19:09,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2022-01-10 08:19:09,226 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:19:09,226 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:19:09,233 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (44)] Ended with exit code 0 [2022-01-10 08:19:09,426 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 08:19:09,426 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:19:09,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:19:09,427 INFO L85 PathProgramCache]: Analyzing trace with hash -114641681, now seen corresponding path program 1 times [2022-01-10 08:19:09,427 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:19:09,427 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1520396539] [2022-01-10 08:19:09,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:19:09,427 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:19:09,427 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:19:09,428 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 08:19:09,429 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 08:19:09,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:19:09,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 422 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 08:19:09,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:19:09,735 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2022-01-10 08:19:09,735 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:19:09,735 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:19:09,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1520396539] [2022-01-10 08:19:09,735 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1520396539] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:19:09,736 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:19:09,736 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 08:19:09,736 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993555172] [2022-01-10 08:19:09,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:19:09,736 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 08:19:09,736 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:19:09,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 08:19:09,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:19:09,737 INFO L87 Difference]: Start difference. First operand 21382 states and 25268 transitions. Second operand has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-10 08:19:11,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:19:11,540 INFO L93 Difference]: Finished difference Result 42738 states and 50495 transitions. [2022-01-10 08:19:11,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 08:19:11,540 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 203 [2022-01-10 08:19:11,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:19:11,585 INFO L225 Difference]: With dead ends: 42738 [2022-01-10 08:19:11,585 INFO L226 Difference]: Without dead ends: 21374 [2022-01-10 08:19:11,613 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 201 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 08:19:11,615 INFO L933 BasicCegarLoop]: 353 mSDtfsCounter, 343 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 343 SdHoareTripleChecker+Valid, 354 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 08:19:11,615 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [343 Valid, 354 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:19:11,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21374 states. [2022-01-10 08:19:13,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21374 to 21374. [2022-01-10 08:19:13,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21374 states, 20055 states have (on average 1.1850909997506855) internal successors, (23767), 20121 states have internal predecessors, (23767), 662 states have call successors, (662), 577 states have call predecessors, (662), 656 states have return successors, (824), 676 states have call predecessors, (824), 660 states have call successors, (824) [2022-01-10 08:19:13,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21374 states to 21374 states and 25253 transitions. [2022-01-10 08:19:13,214 INFO L78 Accepts]: Start accepts. Automaton has 21374 states and 25253 transitions. Word has length 203 [2022-01-10 08:19:13,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:19:13,214 INFO L470 AbstractCegarLoop]: Abstraction has 21374 states and 25253 transitions. [2022-01-10 08:19:13,214 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-10 08:19:13,215 INFO L276 IsEmpty]: Start isEmpty. Operand 21374 states and 25253 transitions. [2022-01-10 08:19:13,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2022-01-10 08:19:13,222 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:19:13,222 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:19:13,230 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (45)] Ended with exit code 0 [2022-01-10 08:19:13,423 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 08:19:13,423 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:19:13,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:19:13,423 INFO L85 PathProgramCache]: Analyzing trace with hash -1411815662, now seen corresponding path program 1 times [2022-01-10 08:19:13,424 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:19:13,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1025227212] [2022-01-10 08:19:13,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:19:13,424 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:19:13,424 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:19:13,425 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 08:19:13,426 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 08:19:13,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:19:13,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 08:19:13,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:19:13,885 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-01-10 08:19:13,886 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:19:13,886 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:19:13,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1025227212] [2022-01-10 08:19:13,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1025227212] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:19:13,886 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:19:13,886 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 08:19:13,886 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10915122] [2022-01-10 08:19:13,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:19:13,886 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 08:19:13,886 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:19:13,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 08:19:13,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 08:19:13,887 INFO L87 Difference]: Start difference. First operand 21374 states and 25253 transitions. Second operand has 4 states, 4 states have (on average 34.5) internal successors, (138), 4 states have internal predecessors, (138), 4 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-01-10 08:19:16,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:19:16,974 INFO L93 Difference]: Finished difference Result 62161 states and 73431 transitions. [2022-01-10 08:19:16,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 08:19:16,974 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 34.5) internal successors, (138), 4 states have internal predecessors, (138), 4 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 204 [2022-01-10 08:19:16,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:19:17,050 INFO L225 Difference]: With dead ends: 62161 [2022-01-10 08:19:17,050 INFO L226 Difference]: Without dead ends: 40805 [2022-01-10 08:19:17,073 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 202 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 08:19:17,073 INFO L933 BasicCegarLoop]: 466 mSDtfsCounter, 425 mSDsluCounter, 535 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 431 SdHoareTripleChecker+Valid, 1001 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 08:19:17,073 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [431 Valid, 1001 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 08:19:17,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40805 states. [2022-01-10 08:19:20,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40805 to 40801. [2022-01-10 08:19:20,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40801 states, 38263 states have (on average 1.1831011682304053) internal successors, (45269), 38410 states have internal predecessors, (45269), 1257 states have call successors, (1257), 1089 states have call predecessors, (1257), 1280 states have return successors, (1627), 1303 states have call predecessors, (1627), 1255 states have call successors, (1627) [2022-01-10 08:19:20,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40801 states to 40801 states and 48153 transitions. [2022-01-10 08:19:20,440 INFO L78 Accepts]: Start accepts. Automaton has 40801 states and 48153 transitions. Word has length 204 [2022-01-10 08:19:20,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:19:20,441 INFO L470 AbstractCegarLoop]: Abstraction has 40801 states and 48153 transitions. [2022-01-10 08:19:20,441 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.5) internal successors, (138), 4 states have internal predecessors, (138), 4 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-01-10 08:19:20,441 INFO L276 IsEmpty]: Start isEmpty. Operand 40801 states and 48153 transitions. [2022-01-10 08:19:20,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2022-01-10 08:19:20,455 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:19:20,455 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:19:20,463 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (46)] Ended with exit code 0 [2022-01-10 08:19:20,656 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 08:19:20,656 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:19:20,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:19:20,656 INFO L85 PathProgramCache]: Analyzing trace with hash -924741936, now seen corresponding path program 1 times [2022-01-10 08:19:20,657 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:19:20,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [839556350] [2022-01-10 08:19:20,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:19:20,657 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:19:20,657 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:19:20,658 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 08:19:20,659 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 08:19:20,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:19:20,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 08:19:20,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:19:20,971 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2022-01-10 08:19:20,971 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:19:20,971 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:19:20,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [839556350] [2022-01-10 08:19:20,972 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [839556350] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:19:20,972 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:19:20,972 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 08:19:20,972 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350298394] [2022-01-10 08:19:20,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:19:20,972 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 08:19:20,972 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:19:20,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 08:19:20,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:19:20,973 INFO L87 Difference]: Start difference. First operand 40801 states and 48153 transitions. Second operand has 3 states, 3 states have (on average 43.0) internal successors, (129), 3 states have internal predecessors, (129), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-10 08:19:24,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:19:24,106 INFO L93 Difference]: Finished difference Result 81577 states and 96268 transitions. [2022-01-10 08:19:24,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 08:19:24,106 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 43.0) internal successors, (129), 3 states have internal predecessors, (129), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 204 [2022-01-10 08:19:24,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:19:24,182 INFO L225 Difference]: With dead ends: 81577 [2022-01-10 08:19:24,183 INFO L226 Difference]: Without dead ends: 40794 [2022-01-10 08:19:24,312 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 202 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 08:19:24,312 INFO L933 BasicCegarLoop]: 352 mSDtfsCounter, 341 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 341 SdHoareTripleChecker+Valid, 353 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 08:19:24,313 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [341 Valid, 353 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:19:24,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40794 states. [2022-01-10 08:19:27,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40794 to 40794. [2022-01-10 08:19:27,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40794 states, 38259 states have (on average 1.183041898638229) internal successors, (45262), 38405 states have internal predecessors, (45262), 1254 states have call successors, (1254), 1089 states have call predecessors, (1254), 1280 states have return successors, (1624), 1300 states have call predecessors, (1624), 1252 states have call successors, (1624) [2022-01-10 08:19:27,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40794 states to 40794 states and 48140 transitions. [2022-01-10 08:19:27,556 INFO L78 Accepts]: Start accepts. Automaton has 40794 states and 48140 transitions. Word has length 204 [2022-01-10 08:19:27,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:19:27,557 INFO L470 AbstractCegarLoop]: Abstraction has 40794 states and 48140 transitions. [2022-01-10 08:19:27,557 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.0) internal successors, (129), 3 states have internal predecessors, (129), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-10 08:19:27,557 INFO L276 IsEmpty]: Start isEmpty. Operand 40794 states and 48140 transitions. [2022-01-10 08:19:27,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2022-01-10 08:19:27,571 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:19:27,571 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:19:27,579 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 08:19:27,771 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 08:19:27,772 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:19:27,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:19:27,772 INFO L85 PathProgramCache]: Analyzing trace with hash 1814081621, now seen corresponding path program 1 times [2022-01-10 08:19:27,772 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:19:27,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1178083595] [2022-01-10 08:19:27,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:19:27,773 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:19:27,773 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:19:27,773 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 08:19:27,774 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 08:19:27,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:19:27,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 08:19:27,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:19:28,168 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-01-10 08:19:28,168 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:19:28,168 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:19:28,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1178083595] [2022-01-10 08:19:28,168 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1178083595] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:19:28,168 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:19:28,168 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 08:19:28,168 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197199457] [2022-01-10 08:19:28,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:19:28,169 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 08:19:28,169 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:19:28,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 08:19:28,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 08:19:28,169 INFO L87 Difference]: Start difference. First operand 40794 states and 48140 transitions. Second operand has 4 states, 4 states have (on average 34.75) internal successors, (139), 4 states have internal predecessors, (139), 4 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-01-10 08:19:34,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:19:34,515 INFO L93 Difference]: Finished difference Result 118466 states and 139802 transitions. [2022-01-10 08:19:34,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 08:19:34,515 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 34.75) internal successors, (139), 4 states have internal predecessors, (139), 4 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 205 [2022-01-10 08:19:34,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:19:34,687 INFO L225 Difference]: With dead ends: 118466 [2022-01-10 08:19:34,688 INFO L226 Difference]: Without dead ends: 77690 [2022-01-10 08:19:34,734 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 203 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 08:19:34,734 INFO L933 BasicCegarLoop]: 350 mSDtfsCounter, 437 mSDsluCounter, 430 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 443 SdHoareTripleChecker+Valid, 780 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 08:19:34,735 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [443 Valid, 780 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 08:19:34,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77690 states. [2022-01-10 08:19:40,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77690 to 77686. [2022-01-10 08:19:40,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77686 states, 72815 states have (on average 1.1815971983794549) internal successors, (86038), 73137 states have internal predecessors, (86038), 2374 states have call successors, (2374), 2049 states have call predecessors, (2374), 2496 states have return successors, (3192), 2500 states have call predecessors, (3192), 2372 states have call successors, (3192) [2022-01-10 08:19:40,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77686 states to 77686 states and 91604 transitions. [2022-01-10 08:19:40,935 INFO L78 Accepts]: Start accepts. Automaton has 77686 states and 91604 transitions. Word has length 205 [2022-01-10 08:19:40,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:19:40,936 INFO L470 AbstractCegarLoop]: Abstraction has 77686 states and 91604 transitions. [2022-01-10 08:19:40,936 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.75) internal successors, (139), 4 states have internal predecessors, (139), 4 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-01-10 08:19:40,936 INFO L276 IsEmpty]: Start isEmpty. Operand 77686 states and 91604 transitions. [2022-01-10 08:19:40,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2022-01-10 08:19:40,963 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:19:40,964 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:19:40,971 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 08:19:41,164 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 08:19:41,164 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:19:41,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:19:41,165 INFO L85 PathProgramCache]: Analyzing trace with hash 2145695726, now seen corresponding path program 1 times [2022-01-10 08:19:41,165 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:19:41,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [507644504] [2022-01-10 08:19:41,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:19:41,165 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:19:41,165 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:19:41,166 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 08:19:41,167 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 08:19:41,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:19:41,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 08:19:41,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:19:41,580 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-01-10 08:19:41,580 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:19:41,580 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:19:41,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [507644504] [2022-01-10 08:19:41,580 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [507644504] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:19:41,580 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:19:41,580 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 08:19:41,581 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075149361] [2022-01-10 08:19:41,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:19:41,581 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 08:19:41,581 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:19:41,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 08:19:41,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 08:19:41,581 INFO L87 Difference]: Start difference. First operand 77686 states and 91604 transitions. Second operand has 4 states, 4 states have (on average 35.0) internal successors, (140), 4 states have internal predecessors, (140), 4 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8)