/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/seq-mthreaded/pals_STARTPALS_ActiveStandby.4_2.ufo.BOUNDED-10.pals.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 06:45:29,141 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 06:45:29,142 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 06:45:29,202 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-10 06:45:29,202 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-10 06:45:29,203 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-10 06:45:29,204 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-10 06:45:29,205 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-10 06:45:29,208 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-10 06:45:29,214 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-10 06:45:29,215 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-10 06:45:29,217 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-10 06:45:29,217 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-10 06:45:29,219 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-10 06:45:29,220 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-10 06:45:29,224 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-10 06:45:29,224 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-10 06:45:29,225 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-10 06:45:29,230 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-10 06:45:29,231 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-10 06:45:29,232 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-10 06:45:29,235 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-10 06:45:29,236 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-10 06:45:29,236 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-10 06:45:29,238 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-01-10 06:45:29,239 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-01-10 06:45:29,239 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-01-10 06:45:29,239 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-01-10 06:45:29,240 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-01-10 06:45:29,240 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-01-10 06:45:29,240 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-10 06:45:29,241 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-10 06:45:29,241 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-10 06:45:29,242 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-10 06:45:29,243 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-10 06:45:29,246 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-10 06:45:29,247 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-10 06:45:29,247 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-10 06:45:29,247 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-10 06:45:29,248 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-10 06:45:29,248 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-10 06:45:29,249 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 06:45:29,267 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 06:45:29,267 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 06:45:29,267 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 06:45:29,267 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 06:45:29,268 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-10 06:45:29,268 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-10 06:45:29,268 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 06:45:29,268 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 06:45:29,269 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 06:45:29,269 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 06:45:29,269 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 06:45:29,269 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 06:45:29,269 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 06:45:29,269 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 06:45:29,269 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 06:45:29,269 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 06:45:29,270 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 06:45:29,270 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 06:45:29,270 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 06:45:29,270 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 06:45:29,270 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 06:45:29,270 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 06:45:29,270 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 06:45:29,270 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 06:45:29,271 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 06:45:29,271 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 06:45:29,271 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 06:45:29,273 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-01-10 06:45:29,273 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-01-10 06:45:29,274 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 06:45:29,274 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 06:45:29,274 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 06:45:29,274 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 06:45:29,274 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 06:45:29,471 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 06:45:29,498 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 06:45:29,501 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 06:45:29,502 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 06:45:29,503 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 06:45:29,503 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded/pals_STARTPALS_ActiveStandby.4_2.ufo.BOUNDED-10.pals.c [2022-01-10 06:45:29,560 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/48f9d90d5/8ab10a48920649089f0c7f95a2ce5b22/FLAGd2a2addbd [2022-01-10 06:45:30,032 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 06:45:30,033 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded/pals_STARTPALS_ActiveStandby.4_2.ufo.BOUNDED-10.pals.c [2022-01-10 06:45:30,049 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/48f9d90d5/8ab10a48920649089f0c7f95a2ce5b22/FLAGd2a2addbd [2022-01-10 06:45:30,376 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/48f9d90d5/8ab10a48920649089f0c7f95a2ce5b22 [2022-01-10 06:45:30,378 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 06:45:30,379 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-10 06:45:30,380 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 06:45:30,381 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 06:45:30,383 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 06:45:30,383 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 06:45:30" (1/1) ... [2022-01-10 06:45:30,384 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@69032dcf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:45:30, skipping insertion in model container [2022-01-10 06:45:30,384 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 06:45:30" (1/1) ... [2022-01-10 06:45:30,390 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 06:45:30,418 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 06:45:30,646 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded/pals_STARTPALS_ActiveStandby.4_2.ufo.BOUNDED-10.pals.c[14702,14715] [2022-01-10 06:45:30,648 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 06:45:30,658 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 06:45:30,710 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded/pals_STARTPALS_ActiveStandby.4_2.ufo.BOUNDED-10.pals.c[14702,14715] [2022-01-10 06:45:30,711 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 06:45:30,738 INFO L208 MainTranslator]: Completed translation [2022-01-10 06:45:30,739 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:45:30 WrapperNode [2022-01-10 06:45:30,739 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 06:45:30,740 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 06:45:30,740 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 06:45:30,740 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 06:45:30,753 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:45:30" (1/1) ... [2022-01-10 06:45:30,764 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:45:30" (1/1) ... [2022-01-10 06:45:30,797 INFO L137 Inliner]: procedures = 32, calls = 48, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 517 [2022-01-10 06:45:30,797 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 06:45:30,798 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 06:45:30,806 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 06:45:30,806 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 06:45:30,812 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:45:30" (1/1) ... [2022-01-10 06:45:30,812 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:45:30" (1/1) ... [2022-01-10 06:45:30,818 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:45:30" (1/1) ... [2022-01-10 06:45:30,818 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:45:30" (1/1) ... [2022-01-10 06:45:30,831 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:45:30" (1/1) ... [2022-01-10 06:45:30,837 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:45:30" (1/1) ... [2022-01-10 06:45:30,840 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:45:30" (1/1) ... [2022-01-10 06:45:30,846 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 06:45:30,851 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 06:45:30,851 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 06:45:30,851 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 06:45:30,852 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:45:30" (1/1) ... [2022-01-10 06:45:30,859 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 06:45:30,875 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 06:45:30,885 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 06:45:30,886 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 06:45:30,915 INFO L130 BoogieDeclarations]: Found specification of procedure read_manual_selection_history [2022-01-10 06:45:30,915 INFO L138 BoogieDeclarations]: Found implementation of procedure read_manual_selection_history [2022-01-10 06:45:30,915 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 06:45:30,915 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 06:45:30,915 INFO L130 BoogieDeclarations]: Found specification of procedure read_side2_failed_history [2022-01-10 06:45:30,915 INFO L138 BoogieDeclarations]: Found implementation of procedure read_side2_failed_history [2022-01-10 06:45:30,915 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2022-01-10 06:45:30,916 INFO L138 BoogieDeclarations]: Found implementation of procedure assert [2022-01-10 06:45:30,916 INFO L130 BoogieDeclarations]: Found specification of procedure flip_the_side [2022-01-10 06:45:30,916 INFO L138 BoogieDeclarations]: Found implementation of procedure flip_the_side [2022-01-10 06:45:30,916 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-01-10 06:45:30,916 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-01-10 06:45:30,916 INFO L130 BoogieDeclarations]: Found specification of procedure read_side1_failed_history [2022-01-10 06:45:30,917 INFO L138 BoogieDeclarations]: Found implementation of procedure read_side1_failed_history [2022-01-10 06:45:30,917 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 06:45:30,917 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 06:45:30,917 INFO L130 BoogieDeclarations]: Found specification of procedure read_active_side_history [2022-01-10 06:45:30,917 INFO L138 BoogieDeclarations]: Found implementation of procedure read_active_side_history [2022-01-10 06:45:31,022 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 06:45:31,023 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 06:45:31,462 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 06:45:31,470 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 06:45:31,471 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-01-10 06:45:31,475 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 06:45:31 BoogieIcfgContainer [2022-01-10 06:45:31,475 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 06:45:31,477 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 06:45:31,477 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 06:45:31,481 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 06:45:31,481 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 06:45:30" (1/3) ... [2022-01-10 06:45:31,481 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9d2f337 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 06:45:31, skipping insertion in model container [2022-01-10 06:45:31,482 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:45:30" (2/3) ... [2022-01-10 06:45:31,482 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9d2f337 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 06:45:31, skipping insertion in model container [2022-01-10 06:45:31,483 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 06:45:31" (3/3) ... [2022-01-10 06:45:31,484 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_STARTPALS_ActiveStandby.4_2.ufo.BOUNDED-10.pals.c [2022-01-10 06:45:31,487 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 06:45:31,487 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-10 06:45:31,521 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 06:45:31,527 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 06:45:31,527 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-10 06:45:31,546 INFO L276 IsEmpty]: Start isEmpty. Operand has 207 states, 167 states have (on average 1.5508982035928143) internal successors, (259), 168 states have internal predecessors, (259), 31 states have call successors, (31), 7 states have call predecessors, (31), 7 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2022-01-10 06:45:31,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-01-10 06:45:31,552 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:45:31,553 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] [2022-01-10 06:45:31,553 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:45:31,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:45:31,558 INFO L85 PathProgramCache]: Analyzing trace with hash -518679476, now seen corresponding path program 1 times [2022-01-10 06:45:31,568 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:45:31,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [342236326] [2022-01-10 06:45:31,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:45:31,570 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:45:31,570 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:45:31,575 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 06:45:31,581 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 06:45:31,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:45:31,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 1 conjunts are in the unsatisfiable core [2022-01-10 06:45:31,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:45:31,875 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 06:45:31,875 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:45:31,876 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:45:31,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [342236326] [2022-01-10 06:45:31,877 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [342236326] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:45:31,877 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:45:31,878 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 06:45:31,879 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069969971] [2022-01-10 06:45:31,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:45:31,884 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-01-10 06:45:31,884 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:45:31,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-01-10 06:45:31,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-10 06:45:31,917 INFO L87 Difference]: Start difference. First operand has 207 states, 167 states have (on average 1.5508982035928143) internal successors, (259), 168 states have internal predecessors, (259), 31 states have call successors, (31), 7 states have call predecessors, (31), 7 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) Second operand has 2 states, 2 states have (on average 20.0) internal successors, (40), 2 states have internal predecessors, (40), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-10 06:45:31,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:45:31,985 INFO L93 Difference]: Finished difference Result 398 states and 642 transitions. [2022-01-10 06:45:31,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-01-10 06:45:31,990 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 20.0) internal successors, (40), 2 states have internal predecessors, (40), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2022-01-10 06:45:31,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:45:32,004 INFO L225 Difference]: With dead ends: 398 [2022-01-10 06:45:32,004 INFO L226 Difference]: Without dead ends: 203 [2022-01-10 06:45:32,012 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-10 06:45:32,015 INFO L933 BasicCegarLoop]: 312 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:45:32,016 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 312 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:45:32,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2022-01-10 06:45:32,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 203. [2022-01-10 06:45:32,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 164 states have (on average 1.5) internal successors, (246), 164 states have internal predecessors, (246), 31 states have call successors, (31), 7 states have call predecessors, (31), 7 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2022-01-10 06:45:32,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 308 transitions. [2022-01-10 06:45:32,095 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 308 transitions. Word has length 44 [2022-01-10 06:45:32,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:45:32,095 INFO L470 AbstractCegarLoop]: Abstraction has 203 states and 308 transitions. [2022-01-10 06:45:32,095 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 20.0) internal successors, (40), 2 states have internal predecessors, (40), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-10 06:45:32,096 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 308 transitions. [2022-01-10 06:45:32,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-01-10 06:45:32,100 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:45:32,100 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 06:45:32,109 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 06:45:32,309 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 06:45:32,309 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:45:32,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:45:32,310 INFO L85 PathProgramCache]: Analyzing trace with hash -527444980, now seen corresponding path program 1 times [2022-01-10 06:45:32,311 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:45:32,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1435644823] [2022-01-10 06:45:32,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:45:32,312 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:45:32,312 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:45:32,313 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 06:45:32,315 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 06:45:32,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:45:32,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-10 06:45:32,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:45:32,536 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 06:45:32,536 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:45:32,536 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:45:32,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1435644823] [2022-01-10 06:45:32,537 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1435644823] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:45:32,537 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:45:32,537 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-10 06:45:32,537 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943845328] [2022-01-10 06:45:32,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:45:32,538 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 06:45:32,538 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:45:32,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 06:45:32,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-01-10 06:45:32,539 INFO L87 Difference]: Start difference. First operand 203 states and 308 transitions. Second operand has 6 states, 5 states have (on average 8.0) internal successors, (40), 6 states have internal predecessors, (40), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-10 06:45:32,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:45:32,662 INFO L93 Difference]: Finished difference Result 531 states and 811 transitions. [2022-01-10 06:45:32,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 06:45:32,665 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 8.0) internal successors, (40), 6 states have internal predecessors, (40), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2022-01-10 06:45:32,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:45:32,674 INFO L225 Difference]: With dead ends: 531 [2022-01-10 06:45:32,675 INFO L226 Difference]: Without dead ends: 342 [2022-01-10 06:45:32,676 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-01-10 06:45:32,677 INFO L933 BasicCegarLoop]: 327 mSDtfsCounter, 171 mSDsluCounter, 1259 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 1586 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:45:32,678 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [197 Valid, 1586 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:45:32,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2022-01-10 06:45:32,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 203. [2022-01-10 06:45:32,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 164 states have (on average 1.4268292682926829) internal successors, (234), 164 states have internal predecessors, (234), 31 states have call successors, (31), 7 states have call predecessors, (31), 7 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2022-01-10 06:45:32,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 296 transitions. [2022-01-10 06:45:32,709 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 296 transitions. Word has length 44 [2022-01-10 06:45:32,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:45:32,709 INFO L470 AbstractCegarLoop]: Abstraction has 203 states and 296 transitions. [2022-01-10 06:45:32,710 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 8.0) internal successors, (40), 6 states have internal predecessors, (40), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-10 06:45:32,710 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 296 transitions. [2022-01-10 06:45:32,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-01-10 06:45:32,712 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:45:32,712 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] [2022-01-10 06:45:32,720 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-01-10 06:45:32,920 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 06:45:32,920 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:45:32,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:45:32,921 INFO L85 PathProgramCache]: Analyzing trace with hash -1202945359, now seen corresponding path program 1 times [2022-01-10 06:45:32,921 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:45:32,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [437201281] [2022-01-10 06:45:32,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:45:32,922 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:45:32,922 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:45:32,923 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 06:45:32,925 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 06:45:33,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:45:33,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 06:45:33,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:45:33,125 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 06:45:33,126 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:45:33,126 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:45:33,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [437201281] [2022-01-10 06:45:33,126 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [437201281] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:45:33,127 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:45:33,127 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:45:33,129 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114984141] [2022-01-10 06:45:33,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:45:33,130 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 06:45:33,130 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:45:33,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 06:45:33,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 06:45:33,131 INFO L87 Difference]: Start difference. First operand 203 states and 296 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 3 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-10 06:45:33,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:45:33,172 INFO L93 Difference]: Finished difference Result 395 states and 585 transitions. [2022-01-10 06:45:33,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 06:45:33,172 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 3 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 55 [2022-01-10 06:45:33,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:45:33,175 INFO L225 Difference]: With dead ends: 395 [2022-01-10 06:45:33,175 INFO L226 Difference]: Without dead ends: 209 [2022-01-10 06:45:33,176 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 52 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 06:45:33,178 INFO L933 BasicCegarLoop]: 290 mSDtfsCounter, 6 mSDsluCounter, 570 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 860 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:45:33,179 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 860 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:45:33,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2022-01-10 06:45:33,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 207. [2022-01-10 06:45:33,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 167 states have (on average 1.4191616766467066) internal successors, (237), 167 states have internal predecessors, (237), 31 states have call successors, (31), 8 states have call predecessors, (31), 8 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2022-01-10 06:45:33,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 299 transitions. [2022-01-10 06:45:33,200 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 299 transitions. Word has length 55 [2022-01-10 06:45:33,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:45:33,201 INFO L470 AbstractCegarLoop]: Abstraction has 207 states and 299 transitions. [2022-01-10 06:45:33,202 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 3 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-10 06:45:33,203 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 299 transitions. [2022-01-10 06:45:33,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-01-10 06:45:33,211 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:45:33,211 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:45:33,223 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 06:45:33,420 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 06:45:33,421 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:45:33,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:45:33,421 INFO L85 PathProgramCache]: Analyzing trace with hash -915994749, now seen corresponding path program 1 times [2022-01-10 06:45:33,422 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:45:33,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2094393018] [2022-01-10 06:45:33,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:45:33,422 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:45:33,422 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:45:33,423 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 06:45:33,424 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 06:45:33,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:45:33,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 06:45:33,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:45:33,706 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:45:33,706 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:45:33,706 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:45:33,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2094393018] [2022-01-10 06:45:33,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2094393018] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:45:33,708 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:45:33,708 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:45:33,709 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664881402] [2022-01-10 06:45:33,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:45:33,711 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 06:45:33,711 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:45:33,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 06:45:33,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:45:33,712 INFO L87 Difference]: Start difference. First operand 207 states and 299 transitions. Second operand has 5 states, 5 states have (on average 12.6) internal successors, (63), 4 states have internal predecessors, (63), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-10 06:45:34,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:45:34,004 INFO L93 Difference]: Finished difference Result 596 states and 882 transitions. [2022-01-10 06:45:34,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 06:45:34,005 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 4 states have internal predecessors, (63), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 71 [2022-01-10 06:45:34,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:45:34,010 INFO L225 Difference]: With dead ends: 596 [2022-01-10 06:45:34,010 INFO L226 Difference]: Without dead ends: 406 [2022-01-10 06:45:34,013 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-01-10 06:45:34,016 INFO L933 BasicCegarLoop]: 289 mSDtfsCounter, 776 mSDsluCounter, 489 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 776 SdHoareTripleChecker+Valid, 778 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 06:45:34,017 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [776 Valid, 778 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 06:45:34,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states. [2022-01-10 06:45:34,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 275. [2022-01-10 06:45:34,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 230 states have (on average 1.4086956521739131) internal successors, (324), 230 states have internal predecessors, (324), 34 states have call successors, (34), 10 states have call predecessors, (34), 10 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2022-01-10 06:45:34,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 392 transitions. [2022-01-10 06:45:34,032 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 392 transitions. Word has length 71 [2022-01-10 06:45:34,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:45:34,032 INFO L470 AbstractCegarLoop]: Abstraction has 275 states and 392 transitions. [2022-01-10 06:45:34,032 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 4 states have internal predecessors, (63), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-10 06:45:34,033 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 392 transitions. [2022-01-10 06:45:34,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-01-10 06:45:34,034 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:45:34,035 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:45:34,046 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 06:45:34,246 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 06:45:34,246 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:45:34,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:45:34,247 INFO L85 PathProgramCache]: Analyzing trace with hash 862574350, now seen corresponding path program 1 times [2022-01-10 06:45:34,247 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:45:34,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1097248198] [2022-01-10 06:45:34,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:45:34,248 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:45:34,248 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:45:34,249 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 06:45:34,251 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 06:45:34,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:45:34,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 06:45:34,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:45:34,498 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:45:34,498 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:45:34,498 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:45:34,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1097248198] [2022-01-10 06:45:34,499 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1097248198] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:45:34,499 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:45:34,499 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:45:34,499 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967774970] [2022-01-10 06:45:34,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:45:34,499 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 06:45:34,499 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:45:34,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 06:45:34,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:45:34,500 INFO L87 Difference]: Start difference. First operand 275 states and 392 transitions. Second operand has 5 states, 5 states have (on average 12.8) internal successors, (64), 4 states have internal predecessors, (64), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-10 06:45:34,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:45:34,765 INFO L93 Difference]: Finished difference Result 597 states and 881 transitions. [2022-01-10 06:45:34,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 06:45:34,766 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 4 states have internal predecessors, (64), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 72 [2022-01-10 06:45:34,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:45:34,768 INFO L225 Difference]: With dead ends: 597 [2022-01-10 06:45:34,768 INFO L226 Difference]: Without dead ends: 407 [2022-01-10 06:45:34,769 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-01-10 06:45:34,770 INFO L933 BasicCegarLoop]: 289 mSDtfsCounter, 773 mSDsluCounter, 491 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 773 SdHoareTripleChecker+Valid, 780 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 06:45:34,770 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [773 Valid, 780 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 06:45:34,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2022-01-10 06:45:34,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 276. [2022-01-10 06:45:34,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 231 states have (on average 1.4025974025974026) internal successors, (324), 231 states have internal predecessors, (324), 34 states have call successors, (34), 10 states have call predecessors, (34), 10 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2022-01-10 06:45:34,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 392 transitions. [2022-01-10 06:45:34,784 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 392 transitions. Word has length 72 [2022-01-10 06:45:34,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:45:34,784 INFO L470 AbstractCegarLoop]: Abstraction has 276 states and 392 transitions. [2022-01-10 06:45:34,784 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 4 states have internal predecessors, (64), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-10 06:45:34,784 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 392 transitions. [2022-01-10 06:45:34,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-01-10 06:45:34,785 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:45:34,785 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:45:34,798 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 06:45:34,994 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 06:45:34,994 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:45:34,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:45:34,995 INFO L85 PathProgramCache]: Analyzing trace with hash 1695978741, now seen corresponding path program 1 times [2022-01-10 06:45:34,995 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:45:34,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1611146175] [2022-01-10 06:45:34,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:45:34,995 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:45:34,996 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:45:34,996 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 06:45:34,997 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 06:45:35,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:45:35,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 06:45:35,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:45:35,236 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:45:35,236 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:45:35,236 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:45:35,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1611146175] [2022-01-10 06:45:35,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1611146175] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:45:35,237 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:45:35,237 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 06:45:35,237 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683415157] [2022-01-10 06:45:35,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:45:35,237 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 06:45:35,237 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:45:35,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 06:45:35,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:45:35,238 INFO L87 Difference]: Start difference. First operand 276 states and 392 transitions. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-10 06:45:35,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:45:35,266 INFO L93 Difference]: Finished difference Result 673 states and 970 transitions. [2022-01-10 06:45:35,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 06:45:35,267 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 75 [2022-01-10 06:45:35,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:45:35,270 INFO L225 Difference]: With dead ends: 673 [2022-01-10 06:45:35,270 INFO L226 Difference]: Without dead ends: 483 [2022-01-10 06:45:35,271 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 73 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 06:45:35,271 INFO L933 BasicCegarLoop]: 341 mSDtfsCounter, 219 mSDsluCounter, 281 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 622 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:45:35,272 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [219 Valid, 622 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:45:35,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2022-01-10 06:45:35,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 473. [2022-01-10 06:45:35,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 473 states, 387 states have (on average 1.4134366925064599) internal successors, (547), 388 states have internal predecessors, (547), 65 states have call successors, (65), 20 states have call predecessors, (65), 20 states have return successors, (65), 64 states have call predecessors, (65), 65 states have call successors, (65) [2022-01-10 06:45:35,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 473 states to 473 states and 677 transitions. [2022-01-10 06:45:35,293 INFO L78 Accepts]: Start accepts. Automaton has 473 states and 677 transitions. Word has length 75 [2022-01-10 06:45:35,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:45:35,293 INFO L470 AbstractCegarLoop]: Abstraction has 473 states and 677 transitions. [2022-01-10 06:45:35,293 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-10 06:45:35,293 INFO L276 IsEmpty]: Start isEmpty. Operand 473 states and 677 transitions. [2022-01-10 06:45:35,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-01-10 06:45:35,294 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:45:35,294 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:45:35,303 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Ended with exit code 0 [2022-01-10 06:45:35,503 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 06:45:35,503 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:45:35,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:45:35,504 INFO L85 PathProgramCache]: Analyzing trace with hash 1123713881, now seen corresponding path program 1 times [2022-01-10 06:45:35,504 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:45:35,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [908925020] [2022-01-10 06:45:35,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:45:35,505 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:45:35,505 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:45:35,506 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 06:45:35,508 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 06:45:35,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:45:35,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 06:45:35,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:45:35,708 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:45:35,708 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:45:35,708 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:45:35,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [908925020] [2022-01-10 06:45:35,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [908925020] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:45:35,709 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:45:35,709 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 06:45:35,709 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806989759] [2022-01-10 06:45:35,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:45:35,710 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 06:45:35,710 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:45:35,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 06:45:35,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:45:35,711 INFO L87 Difference]: Start difference. First operand 473 states and 677 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-10 06:45:35,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:45:35,763 INFO L93 Difference]: Finished difference Result 1142 states and 1660 transitions. [2022-01-10 06:45:35,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 06:45:35,764 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 76 [2022-01-10 06:45:35,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:45:35,768 INFO L225 Difference]: With dead ends: 1142 [2022-01-10 06:45:35,769 INFO L226 Difference]: Without dead ends: 795 [2022-01-10 06:45:35,770 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 74 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 06:45:35,771 INFO L933 BasicCegarLoop]: 374 mSDtfsCounter, 227 mSDsluCounter, 283 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 657 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:45:35,771 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [227 Valid, 657 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:45:35,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 795 states. [2022-01-10 06:45:35,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 795 to 778. [2022-01-10 06:45:35,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 778 states, 616 states have (on average 1.4237012987012987) internal successors, (877), 619 states have internal predecessors, (877), 124 states have call successors, (124), 37 states have call predecessors, (124), 37 states have return successors, (124), 121 states have call predecessors, (124), 124 states have call successors, (124) [2022-01-10 06:45:35,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 778 states to 778 states and 1125 transitions. [2022-01-10 06:45:35,811 INFO L78 Accepts]: Start accepts. Automaton has 778 states and 1125 transitions. Word has length 76 [2022-01-10 06:45:35,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:45:35,811 INFO L470 AbstractCegarLoop]: Abstraction has 778 states and 1125 transitions. [2022-01-10 06:45:35,811 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-10 06:45:35,812 INFO L276 IsEmpty]: Start isEmpty. Operand 778 states and 1125 transitions. [2022-01-10 06:45:35,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-01-10 06:45:35,813 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:45:35,813 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:45:35,825 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 06:45:36,022 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 06:45:36,023 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:45:36,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:45:36,024 INFO L85 PathProgramCache]: Analyzing trace with hash -156149797, now seen corresponding path program 1 times [2022-01-10 06:45:36,024 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:45:36,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1171789807] [2022-01-10 06:45:36,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:45:36,024 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:45:36,024 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:45:36,025 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 06:45:36,065 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 06:45:36,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:45:36,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 06:45:36,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:45:36,242 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-10 06:45:36,243 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:45:36,243 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:45:36,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1171789807] [2022-01-10 06:45:36,243 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1171789807] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:45:36,243 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:45:36,243 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 06:45:36,243 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516734397] [2022-01-10 06:45:36,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:45:36,244 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 06:45:36,244 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:45:36,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 06:45:36,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:45:36,244 INFO L87 Difference]: Start difference. First operand 778 states and 1125 transitions. Second operand has 5 states, 4 states have (on average 17.0) internal successors, (68), 5 states have internal predecessors, (68), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-10 06:45:36,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:45:36,288 INFO L93 Difference]: Finished difference Result 1299 states and 1897 transitions. [2022-01-10 06:45:36,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 06:45:36,289 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 17.0) internal successors, (68), 5 states have internal predecessors, (68), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 76 [2022-01-10 06:45:36,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:45:36,292 INFO L225 Difference]: With dead ends: 1299 [2022-01-10 06:45:36,292 INFO L226 Difference]: Without dead ends: 624 [2022-01-10 06:45:36,294 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 72 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 06:45:36,294 INFO L933 BasicCegarLoop]: 293 mSDtfsCounter, 2 mSDsluCounter, 867 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1160 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:45:36,294 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 1160 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:45:36,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 624 states. [2022-01-10 06:45:36,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 624 to 624. [2022-01-10 06:45:36,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 624 states, 499 states have (on average 1.4248496993987976) internal successors, (711), 501 states have internal predecessors, (711), 95 states have call successors, (95), 29 states have call predecessors, (95), 29 states have return successors, (95), 93 states have call predecessors, (95), 95 states have call successors, (95) [2022-01-10 06:45:36,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 624 states to 624 states and 901 transitions. [2022-01-10 06:45:36,317 INFO L78 Accepts]: Start accepts. Automaton has 624 states and 901 transitions. Word has length 76 [2022-01-10 06:45:36,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:45:36,317 INFO L470 AbstractCegarLoop]: Abstraction has 624 states and 901 transitions. [2022-01-10 06:45:36,317 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 17.0) internal successors, (68), 5 states have internal predecessors, (68), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-10 06:45:36,317 INFO L276 IsEmpty]: Start isEmpty. Operand 624 states and 901 transitions. [2022-01-10 06:45:36,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-01-10 06:45:36,318 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:45:36,318 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:45:36,329 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 06:45:36,527 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 06:45:36,528 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:45:36,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:45:36,528 INFO L85 PathProgramCache]: Analyzing trace with hash -1447667936, now seen corresponding path program 1 times [2022-01-10 06:45:36,529 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:45:36,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1370069683] [2022-01-10 06:45:36,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:45:36,529 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:45:36,529 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:45:36,530 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 06:45:36,531 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 06:45:36,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:45:36,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 06:45:36,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:45:36,712 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-10 06:45:36,712 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:45:36,712 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:45:36,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1370069683] [2022-01-10 06:45:36,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1370069683] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:45:36,713 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:45:36,713 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:45:36,713 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424084220] [2022-01-10 06:45:36,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:45:36,714 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 06:45:36,714 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:45:36,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 06:45:36,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 06:45:36,714 INFO L87 Difference]: Start difference. First operand 624 states and 901 transitions. Second operand has 4 states, 4 states have (on average 16.25) internal successors, (65), 3 states have internal predecessors, (65), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-01-10 06:45:36,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:45:36,747 INFO L93 Difference]: Finished difference Result 1137 states and 1662 transitions. [2022-01-10 06:45:36,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 06:45:36,748 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 3 states have internal predecessors, (65), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 76 [2022-01-10 06:45:36,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:45:36,752 INFO L225 Difference]: With dead ends: 1137 [2022-01-10 06:45:36,752 INFO L226 Difference]: Without dead ends: 645 [2022-01-10 06:45:36,753 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 73 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 06:45:36,755 INFO L933 BasicCegarLoop]: 292 mSDtfsCounter, 7 mSDsluCounter, 581 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 873 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:45:36,755 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 873 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:45:36,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 645 states. [2022-01-10 06:45:36,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 645 to 639. [2022-01-10 06:45:36,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 639 states, 511 states have (on average 1.4148727984344422) internal successors, (723), 513 states have internal predecessors, (723), 95 states have call successors, (95), 32 states have call predecessors, (95), 32 states have return successors, (95), 93 states have call predecessors, (95), 95 states have call successors, (95) [2022-01-10 06:45:36,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 639 states to 639 states and 913 transitions. [2022-01-10 06:45:36,788 INFO L78 Accepts]: Start accepts. Automaton has 639 states and 913 transitions. Word has length 76 [2022-01-10 06:45:36,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:45:36,789 INFO L470 AbstractCegarLoop]: Abstraction has 639 states and 913 transitions. [2022-01-10 06:45:36,789 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 3 states have internal predecessors, (65), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-01-10 06:45:36,789 INFO L276 IsEmpty]: Start isEmpty. Operand 639 states and 913 transitions. [2022-01-10 06:45:36,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-01-10 06:45:36,790 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:45:36,790 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:45:36,801 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 06:45:36,999 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 06:45:36,999 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:45:37,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:45:37,000 INFO L85 PathProgramCache]: Analyzing trace with hash 424195238, now seen corresponding path program 1 times [2022-01-10 06:45:37,001 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:45:37,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1539824298] [2022-01-10 06:45:37,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:45:37,001 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:45:37,001 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:45:37,002 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 06:45:37,023 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 06:45:37,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:45:37,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 06:45:37,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:45:37,214 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-10 06:45:37,215 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:45:37,215 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:45:37,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1539824298] [2022-01-10 06:45:37,215 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1539824298] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:45:37,215 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:45:37,215 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:45:37,215 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597951853] [2022-01-10 06:45:37,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:45:37,216 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 06:45:37,216 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:45:37,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 06:45:37,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 06:45:37,217 INFO L87 Difference]: Start difference. First operand 639 states and 913 transitions. Second operand has 4 states, 4 states have (on average 17.75) internal successors, (71), 3 states have internal predecessors, (71), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-01-10 06:45:37,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:45:37,280 INFO L93 Difference]: Finished difference Result 1167 states and 1701 transitions. [2022-01-10 06:45:37,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 06:45:37,280 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 3 states have internal predecessors, (71), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 84 [2022-01-10 06:45:37,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:45:37,283 INFO L225 Difference]: With dead ends: 1167 [2022-01-10 06:45:37,283 INFO L226 Difference]: Without dead ends: 660 [2022-01-10 06:45:37,285 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 81 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 06:45:37,285 INFO L933 BasicCegarLoop]: 291 mSDtfsCounter, 7 mSDsluCounter, 574 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 865 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:45:37,285 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 865 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:45:37,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 660 states. [2022-01-10 06:45:37,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 660 to 654. [2022-01-10 06:45:37,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 654 states, 523 states have (on average 1.4053537284894837) internal successors, (735), 525 states have internal predecessors, (735), 95 states have call successors, (95), 35 states have call predecessors, (95), 35 states have return successors, (95), 93 states have call predecessors, (95), 95 states have call successors, (95) [2022-01-10 06:45:37,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 654 states to 654 states and 925 transitions. [2022-01-10 06:45:37,308 INFO L78 Accepts]: Start accepts. Automaton has 654 states and 925 transitions. Word has length 84 [2022-01-10 06:45:37,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:45:37,308 INFO L470 AbstractCegarLoop]: Abstraction has 654 states and 925 transitions. [2022-01-10 06:45:37,308 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 3 states have internal predecessors, (71), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-01-10 06:45:37,308 INFO L276 IsEmpty]: Start isEmpty. Operand 654 states and 925 transitions. [2022-01-10 06:45:37,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-01-10 06:45:37,309 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:45:37,310 INFO L514 BasicCegarLoop]: trace histogram [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 06:45:37,317 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 06:45:37,515 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 06:45:37,516 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:45:37,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:45:37,516 INFO L85 PathProgramCache]: Analyzing trace with hash 369914576, now seen corresponding path program 1 times [2022-01-10 06:45:37,516 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:45:37,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1509423482] [2022-01-10 06:45:37,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:45:37,517 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:45:37,517 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:45:37,518 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 06:45:37,518 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 06:45:37,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:45:37,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 06:45:37,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:45:37,732 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-10 06:45:37,732 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:45:37,733 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:45:37,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1509423482] [2022-01-10 06:45:37,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1509423482] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:45:37,733 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:45:37,733 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:45:37,733 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380989814] [2022-01-10 06:45:37,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:45:37,733 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 06:45:37,733 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:45:37,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 06:45:37,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 06:45:37,735 INFO L87 Difference]: Start difference. First operand 654 states and 925 transitions. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 3 states have internal predecessors, (77), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-01-10 06:45:37,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:45:37,772 INFO L93 Difference]: Finished difference Result 1194 states and 1707 transitions. [2022-01-10 06:45:37,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 06:45:37,772 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 3 states have internal predecessors, (77), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 92 [2022-01-10 06:45:37,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:45:37,776 INFO L225 Difference]: With dead ends: 1194 [2022-01-10 06:45:37,776 INFO L226 Difference]: Without dead ends: 672 [2022-01-10 06:45:37,779 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 90 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 06:45:37,780 INFO L933 BasicCegarLoop]: 293 mSDtfsCounter, 6 mSDsluCounter, 572 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 865 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:45:37,780 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 865 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:45:37,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 672 states. [2022-01-10 06:45:37,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 672 to 666. [2022-01-10 06:45:37,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 666 states, 532 states have (on average 1.3984962406015038) internal successors, (744), 534 states have internal predecessors, (744), 95 states have call successors, (95), 38 states have call predecessors, (95), 38 states have return successors, (95), 93 states have call predecessors, (95), 95 states have call successors, (95) [2022-01-10 06:45:37,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 666 states to 666 states and 934 transitions. [2022-01-10 06:45:37,808 INFO L78 Accepts]: Start accepts. Automaton has 666 states and 934 transitions. Word has length 92 [2022-01-10 06:45:37,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:45:37,808 INFO L470 AbstractCegarLoop]: Abstraction has 666 states and 934 transitions. [2022-01-10 06:45:37,808 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 3 states have internal predecessors, (77), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-01-10 06:45:37,808 INFO L276 IsEmpty]: Start isEmpty. Operand 666 states and 934 transitions. [2022-01-10 06:45:37,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-01-10 06:45:37,809 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:45:37,809 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:45:37,819 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 06:45:38,018 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 06:45:38,018 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:45:38,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:45:38,019 INFO L85 PathProgramCache]: Analyzing trace with hash -1528593417, now seen corresponding path program 1 times [2022-01-10 06:45:38,019 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:45:38,019 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2090333705] [2022-01-10 06:45:38,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:45:38,020 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:45:38,020 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:45:38,021 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 06:45:38,023 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 06:45:38,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:45:38,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-10 06:45:38,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:45:38,327 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:45:38,327 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:45:38,552 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-10 06:45:38,552 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:45:38,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2090333705] [2022-01-10 06:45:38,552 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2090333705] provided 1 perfect and 1 imperfect interpolant sequences [2022-01-10 06:45:38,552 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-10 06:45:38,552 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 8 [2022-01-10 06:45:38,553 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803484349] [2022-01-10 06:45:38,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:45:38,553 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-10 06:45:38,553 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:45:38,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-10 06:45:38,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-01-10 06:45:38,553 INFO L87 Difference]: Start difference. First operand 666 states and 934 transitions. Second operand has 7 states, 7 states have (on average 11.0) internal successors, (77), 6 states have internal predecessors, (77), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2022-01-10 06:45:38,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:45:38,814 INFO L93 Difference]: Finished difference Result 1898 states and 2730 transitions. [2022-01-10 06:45:38,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-10 06:45:38,814 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.0) internal successors, (77), 6 states have internal predecessors, (77), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 92 [2022-01-10 06:45:38,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:45:38,838 INFO L225 Difference]: With dead ends: 1898 [2022-01-10 06:45:38,838 INFO L226 Difference]: Without dead ends: 1364 [2022-01-10 06:45:38,840 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 176 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-01-10 06:45:38,841 INFO L933 BasicCegarLoop]: 410 mSDtfsCounter, 456 mSDsluCounter, 1802 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 481 SdHoareTripleChecker+Valid, 2212 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 06:45:38,841 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [481 Valid, 2212 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 06:45:38,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1364 states. [2022-01-10 06:45:38,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1364 to 943. [2022-01-10 06:45:38,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 943 states, 734 states have (on average 1.393732970027248) internal successors, (1023), 738 states have internal predecessors, (1023), 149 states have call successors, (149), 59 states have call predecessors, (149), 59 states have return successors, (149), 145 states have call predecessors, (149), 149 states have call successors, (149) [2022-01-10 06:45:38,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 943 states to 943 states and 1321 transitions. [2022-01-10 06:45:38,897 INFO L78 Accepts]: Start accepts. Automaton has 943 states and 1321 transitions. Word has length 92 [2022-01-10 06:45:38,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:45:38,898 INFO L470 AbstractCegarLoop]: Abstraction has 943 states and 1321 transitions. [2022-01-10 06:45:38,898 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.0) internal successors, (77), 6 states have internal predecessors, (77), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2022-01-10 06:45:38,898 INFO L276 IsEmpty]: Start isEmpty. Operand 943 states and 1321 transitions. [2022-01-10 06:45:38,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-01-10 06:45:38,900 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:45:38,901 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:45:38,910 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-01-10 06:45:39,110 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 06:45:39,110 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:45:39,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:45:39,111 INFO L85 PathProgramCache]: Analyzing trace with hash 491862460, now seen corresponding path program 1 times [2022-01-10 06:45:39,111 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:45:39,111 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [198142340] [2022-01-10 06:45:39,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:45:39,112 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:45:39,112 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:45:39,113 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 06:45:39,115 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 06:45:39,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:45:39,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 06:45:39,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:45:39,341 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-10 06:45:39,341 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:45:39,341 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:45:39,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [198142340] [2022-01-10 06:45:39,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [198142340] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:45:39,342 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:45:39,342 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:45:39,342 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571964012] [2022-01-10 06:45:39,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:45:39,342 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 06:45:39,342 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:45:39,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 06:45:39,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 06:45:39,343 INFO L87 Difference]: Start difference. First operand 943 states and 1321 transitions. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 3 states have internal predecessors, (80), 2 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-01-10 06:45:39,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:45:39,400 INFO L93 Difference]: Finished difference Result 1732 states and 2478 transitions. [2022-01-10 06:45:39,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 06:45:39,401 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 3 states have internal predecessors, (80), 2 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 99 [2022-01-10 06:45:39,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:45:39,406 INFO L225 Difference]: With dead ends: 1732 [2022-01-10 06:45:39,406 INFO L226 Difference]: Without dead ends: 978 [2022-01-10 06:45:39,408 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 96 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 06:45:39,409 INFO L933 BasicCegarLoop]: 291 mSDtfsCounter, 7 mSDsluCounter, 574 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 865 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:45:39,409 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 865 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:45:39,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 978 states. [2022-01-10 06:45:39,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 978 to 968. [2022-01-10 06:45:39,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 968 states, 754 states have (on average 1.3832891246684351) internal successors, (1043), 758 states have internal predecessors, (1043), 149 states have call successors, (149), 64 states have call predecessors, (149), 64 states have return successors, (149), 145 states have call predecessors, (149), 149 states have call successors, (149) [2022-01-10 06:45:39,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 968 states to 968 states and 1341 transitions. [2022-01-10 06:45:39,452 INFO L78 Accepts]: Start accepts. Automaton has 968 states and 1341 transitions. Word has length 99 [2022-01-10 06:45:39,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:45:39,452 INFO L470 AbstractCegarLoop]: Abstraction has 968 states and 1341 transitions. [2022-01-10 06:45:39,452 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 3 states have internal predecessors, (80), 2 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-01-10 06:45:39,452 INFO L276 IsEmpty]: Start isEmpty. Operand 968 states and 1341 transitions. [2022-01-10 06:45:39,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-01-10 06:45:39,454 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:45:39,454 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:45:39,471 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-01-10 06:45:39,663 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 06:45:39,663 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:45:39,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:45:39,664 INFO L85 PathProgramCache]: Analyzing trace with hash 1199462, now seen corresponding path program 1 times [2022-01-10 06:45:39,664 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:45:39,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2114579459] [2022-01-10 06:45:39,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:45:39,665 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:45:39,665 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:45:39,666 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 06:45:39,666 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 06:45:39,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:45:39,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 06:45:39,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:45:39,926 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-10 06:45:39,926 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:45:39,926 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:45:39,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2114579459] [2022-01-10 06:45:39,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2114579459] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:45:39,926 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:45:39,926 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:45:39,926 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465760867] [2022-01-10 06:45:39,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:45:39,927 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 06:45:39,927 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:45:39,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 06:45:39,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 06:45:39,928 INFO L87 Difference]: Start difference. First operand 968 states and 1341 transitions. Second operand has 4 states, 4 states have (on average 21.5) internal successors, (86), 3 states have internal predecessors, (86), 2 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-01-10 06:45:39,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:45:39,979 INFO L93 Difference]: Finished difference Result 1771 states and 2478 transitions. [2022-01-10 06:45:39,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 06:45:39,980 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 3 states have internal predecessors, (86), 2 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 107 [2022-01-10 06:45:39,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:45:39,985 INFO L225 Difference]: With dead ends: 1771 [2022-01-10 06:45:39,985 INFO L226 Difference]: Without dead ends: 998 [2022-01-10 06:45:39,987 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 105 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 06:45:39,987 INFO L933 BasicCegarLoop]: 293 mSDtfsCounter, 6 mSDsluCounter, 572 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 865 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:45:39,988 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 865 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:45:39,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 998 states. [2022-01-10 06:45:40,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 998 to 988. [2022-01-10 06:45:40,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 988 states, 769 states have (on average 1.3758127438231469) internal successors, (1058), 773 states have internal predecessors, (1058), 149 states have call successors, (149), 69 states have call predecessors, (149), 69 states have return successors, (149), 145 states have call predecessors, (149), 149 states have call successors, (149) [2022-01-10 06:45:40,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 988 states to 988 states and 1356 transitions. [2022-01-10 06:45:40,024 INFO L78 Accepts]: Start accepts. Automaton has 988 states and 1356 transitions. Word has length 107 [2022-01-10 06:45:40,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:45:40,024 INFO L470 AbstractCegarLoop]: Abstraction has 988 states and 1356 transitions. [2022-01-10 06:45:40,024 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 3 states have internal predecessors, (86), 2 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-01-10 06:45:40,025 INFO L276 IsEmpty]: Start isEmpty. Operand 988 states and 1356 transitions. [2022-01-10 06:45:40,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-01-10 06:45:40,026 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:45:40,026 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:45:40,035 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 06:45:40,235 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 06:45:40,236 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:45:40,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:45:40,236 INFO L85 PathProgramCache]: Analyzing trace with hash -1013166041, now seen corresponding path program 1 times [2022-01-10 06:45:40,236 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:45:40,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [754848486] [2022-01-10 06:45:40,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:45:40,237 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:45:40,237 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:45:40,238 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 06:45:40,238 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 06:45:40,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:45:40,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-10 06:45:40,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:45:40,557 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-10 06:45:40,558 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:45:40,782 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-01-10 06:45:40,783 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:45:40,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [754848486] [2022-01-10 06:45:40,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [754848486] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:45:40,783 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:45:40,783 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2022-01-10 06:45:40,783 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136284684] [2022-01-10 06:45:40,783 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:45:40,783 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-10 06:45:40,784 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:45:40,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-10 06:45:40,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-01-10 06:45:40,784 INFO L87 Difference]: Start difference. First operand 988 states and 1356 transitions. Second operand has 8 states, 8 states have (on average 13.0) internal successors, (104), 7 states have internal predecessors, (104), 3 states have call successors, (16), 4 states have call predecessors, (16), 6 states have return successors, (14), 4 states have call predecessors, (14), 3 states have call successors, (14) [2022-01-10 06:45:41,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:45:41,081 INFO L93 Difference]: Finished difference Result 2066 states and 2906 transitions. [2022-01-10 06:45:41,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-10 06:45:41,081 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 7 states have internal predecessors, (104), 3 states have call successors, (16), 4 states have call predecessors, (16), 6 states have return successors, (14), 4 states have call predecessors, (14), 3 states have call successors, (14) Word has length 108 [2022-01-10 06:45:41,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:45:41,088 INFO L225 Difference]: With dead ends: 2066 [2022-01-10 06:45:41,088 INFO L226 Difference]: Without dead ends: 1289 [2022-01-10 06:45:41,090 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 208 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-01-10 06:45:41,091 INFO L933 BasicCegarLoop]: 492 mSDtfsCounter, 448 mSDsluCounter, 2503 mSDsCounter, 0 mSdLazyCounter, 267 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 472 SdHoareTripleChecker+Valid, 2995 SdHoareTripleChecker+Invalid, 320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 06:45:41,091 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [472 Valid, 2995 Invalid, 320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 267 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 06:45:41,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1289 states. [2022-01-10 06:45:41,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1289 to 988. [2022-01-10 06:45:41,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 988 states, 769 states have (on average 1.3732119635890767) internal successors, (1056), 773 states have internal predecessors, (1056), 149 states have call successors, (149), 69 states have call predecessors, (149), 69 states have return successors, (149), 145 states have call predecessors, (149), 149 states have call successors, (149) [2022-01-10 06:45:41,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 988 states to 988 states and 1354 transitions. [2022-01-10 06:45:41,135 INFO L78 Accepts]: Start accepts. Automaton has 988 states and 1354 transitions. Word has length 108 [2022-01-10 06:45:41,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:45:41,135 INFO L470 AbstractCegarLoop]: Abstraction has 988 states and 1354 transitions. [2022-01-10 06:45:41,135 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 7 states have internal predecessors, (104), 3 states have call successors, (16), 4 states have call predecessors, (16), 6 states have return successors, (14), 4 states have call predecessors, (14), 3 states have call successors, (14) [2022-01-10 06:45:41,136 INFO L276 IsEmpty]: Start isEmpty. Operand 988 states and 1354 transitions. [2022-01-10 06:45:41,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-01-10 06:45:41,137 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:45:41,137 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:45:41,146 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 06:45:41,346 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 06:45:41,346 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:45:41,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:45:41,346 INFO L85 PathProgramCache]: Analyzing trace with hash 1941201166, now seen corresponding path program 1 times [2022-01-10 06:45:41,347 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:45:41,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [622940701] [2022-01-10 06:45:41,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:45:41,347 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:45:41,347 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:45:41,348 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 06:45:41,350 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 06:45:41,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:45:41,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 06:45:41,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:45:41,667 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-10 06:45:41,667 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:45:41,667 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:45:41,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [622940701] [2022-01-10 06:45:41,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [622940701] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:45:41,668 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:45:41,668 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-10 06:45:41,668 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390907815] [2022-01-10 06:45:41,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:45:41,668 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-10 06:45:41,668 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:45:41,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-10 06:45:41,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-01-10 06:45:41,669 INFO L87 Difference]: Start difference. First operand 988 states and 1354 transitions. Second operand has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 6 states have internal predecessors, (92), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2022-01-10 06:45:42,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:45:42,174 INFO L93 Difference]: Finished difference Result 2065 states and 2923 transitions. [2022-01-10 06:45:42,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-10 06:45:42,174 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 6 states have internal predecessors, (92), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) Word has length 112 [2022-01-10 06:45:42,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:45:42,180 INFO L225 Difference]: With dead ends: 2065 [2022-01-10 06:45:42,180 INFO L226 Difference]: Without dead ends: 1390 [2022-01-10 06:45:42,182 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-01-10 06:45:42,182 INFO L933 BasicCegarLoop]: 617 mSDtfsCounter, 749 mSDsluCounter, 1821 mSDsCounter, 0 mSdLazyCounter, 332 mSolverCounterSat, 187 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 749 SdHoareTripleChecker+Valid, 2438 SdHoareTripleChecker+Invalid, 519 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 187 IncrementalHoareTripleChecker+Valid, 332 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-10 06:45:42,183 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [749 Valid, 2438 Invalid, 519 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [187 Valid, 332 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-10 06:45:42,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1390 states. [2022-01-10 06:45:42,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1390 to 981. [2022-01-10 06:45:42,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 981 states, 761 states have (on average 1.3600525624178712) internal successors, (1035), 765 states have internal predecessors, (1035), 149 states have call successors, (149), 70 states have call predecessors, (149), 70 states have return successors, (149), 145 states have call predecessors, (149), 149 states have call successors, (149) [2022-01-10 06:45:42,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 981 states to 981 states and 1333 transitions. [2022-01-10 06:45:42,227 INFO L78 Accepts]: Start accepts. Automaton has 981 states and 1333 transitions. Word has length 112 [2022-01-10 06:45:42,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:45:42,228 INFO L470 AbstractCegarLoop]: Abstraction has 981 states and 1333 transitions. [2022-01-10 06:45:42,228 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 6 states have internal predecessors, (92), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2022-01-10 06:45:42,228 INFO L276 IsEmpty]: Start isEmpty. Operand 981 states and 1333 transitions. [2022-01-10 06:45:42,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-01-10 06:45:42,229 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:45:42,229 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:45:42,241 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 06:45:42,439 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 06:45:42,439 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:45:42,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:45:42,439 INFO L85 PathProgramCache]: Analyzing trace with hash 1855933458, now seen corresponding path program 1 times [2022-01-10 06:45:42,440 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:45:42,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1982312329] [2022-01-10 06:45:42,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:45:42,440 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:45:42,440 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:45:42,441 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 06:45:42,442 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 06:45:42,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:45:42,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 06:45:42,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:45:42,750 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-10 06:45:42,751 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:45:42,751 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:45:42,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1982312329] [2022-01-10 06:45:42,751 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1982312329] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:45:42,751 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:45:42,751 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-10 06:45:42,751 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846882194] [2022-01-10 06:45:42,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:45:42,752 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-10 06:45:42,752 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:45:42,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-10 06:45:42,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-01-10 06:45:42,752 INFO L87 Difference]: Start difference. First operand 981 states and 1333 transitions. Second operand has 7 states, 7 states have (on average 13.285714285714286) internal successors, (93), 6 states have internal predecessors, (93), 3 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2022-01-10 06:45:43,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:45:43,267 INFO L93 Difference]: Finished difference Result 2166 states and 3048 transitions. [2022-01-10 06:45:43,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-10 06:45:43,268 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.285714285714286) internal successors, (93), 6 states have internal predecessors, (93), 3 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 113 [2022-01-10 06:45:43,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:45:43,275 INFO L225 Difference]: With dead ends: 2166 [2022-01-10 06:45:43,276 INFO L226 Difference]: Without dead ends: 1491 [2022-01-10 06:45:43,279 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-01-10 06:45:43,279 INFO L933 BasicCegarLoop]: 666 mSDtfsCounter, 655 mSDsluCounter, 2048 mSDsCounter, 0 mSdLazyCounter, 436 mSolverCounterSat, 163 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 655 SdHoareTripleChecker+Valid, 2714 SdHoareTripleChecker+Invalid, 599 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 163 IncrementalHoareTripleChecker+Valid, 436 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-10 06:45:43,280 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [655 Valid, 2714 Invalid, 599 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [163 Valid, 436 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-10 06:45:43,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1491 states. [2022-01-10 06:45:43,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1491 to 1096. [2022-01-10 06:45:43,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1096 states, 841 states have (on average 1.3483947681331747) internal successors, (1134), 846 states have internal predecessors, (1134), 172 states have call successors, (172), 82 states have call predecessors, (172), 82 states have return successors, (172), 167 states have call predecessors, (172), 172 states have call successors, (172) [2022-01-10 06:45:43,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1096 states to 1096 states and 1478 transitions. [2022-01-10 06:45:43,355 INFO L78 Accepts]: Start accepts. Automaton has 1096 states and 1478 transitions. Word has length 113 [2022-01-10 06:45:43,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:45:43,356 INFO L470 AbstractCegarLoop]: Abstraction has 1096 states and 1478 transitions. [2022-01-10 06:45:43,356 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.285714285714286) internal successors, (93), 6 states have internal predecessors, (93), 3 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2022-01-10 06:45:43,356 INFO L276 IsEmpty]: Start isEmpty. Operand 1096 states and 1478 transitions. [2022-01-10 06:45:43,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-01-10 06:45:43,357 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:45:43,357 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:45:43,366 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 06:45:43,566 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 06:45:43,567 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:45:43,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:45:43,567 INFO L85 PathProgramCache]: Analyzing trace with hash 465086573, now seen corresponding path program 1 times [2022-01-10 06:45:43,567 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:45:43,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [946216011] [2022-01-10 06:45:43,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:45:43,568 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:45:43,568 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:45:43,568 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 06:45:43,570 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 06:45:43,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:45:43,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 06:45:43,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:45:43,834 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-10 06:45:43,834 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:45:43,834 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:45:43,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [946216011] [2022-01-10 06:45:43,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [946216011] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:45:43,835 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:45:43,835 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:45:43,835 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673628781] [2022-01-10 06:45:43,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:45:43,835 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 06:45:43,835 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:45:43,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 06:45:43,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 06:45:43,836 INFO L87 Difference]: Start difference. First operand 1096 states and 1478 transitions. Second operand has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-01-10 06:45:44,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:45:44,046 INFO L93 Difference]: Finished difference Result 2962 states and 4074 transitions. [2022-01-10 06:45:44,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 06:45:44,047 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 113 [2022-01-10 06:45:44,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:45:44,058 INFO L225 Difference]: With dead ends: 2962 [2022-01-10 06:45:44,058 INFO L226 Difference]: Without dead ends: 2294 [2022-01-10 06:45:44,060 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 111 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 06:45:44,061 INFO L933 BasicCegarLoop]: 397 mSDtfsCounter, 418 mSDsluCounter, 663 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 418 SdHoareTripleChecker+Valid, 1060 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:45:44,061 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [418 Valid, 1060 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:45:44,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2294 states. [2022-01-10 06:45:44,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2294 to 2033. [2022-01-10 06:45:44,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2033 states, 1537 states have (on average 1.3396226415094339) internal successors, (2059), 1548 states have internal predecessors, (2059), 337 states have call successors, (337), 158 states have call predecessors, (337), 158 states have return successors, (337), 326 states have call predecessors, (337), 337 states have call successors, (337) [2022-01-10 06:45:44,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2033 states to 2033 states and 2733 transitions. [2022-01-10 06:45:44,193 INFO L78 Accepts]: Start accepts. Automaton has 2033 states and 2733 transitions. Word has length 113 [2022-01-10 06:45:44,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:45:44,194 INFO L470 AbstractCegarLoop]: Abstraction has 2033 states and 2733 transitions. [2022-01-10 06:45:44,194 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-01-10 06:45:44,194 INFO L276 IsEmpty]: Start isEmpty. Operand 2033 states and 2733 transitions. [2022-01-10 06:45:44,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-01-10 06:45:44,196 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:45:44,196 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:45:44,206 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 06:45:44,405 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 06:45:44,406 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:45:44,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:45:44,406 INFO L85 PathProgramCache]: Analyzing trace with hash 619186071, now seen corresponding path program 1 times [2022-01-10 06:45:44,406 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:45:44,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1839272231] [2022-01-10 06:45:44,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:45:44,407 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:45:44,407 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:45:44,408 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 06:45:44,412 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 06:45:44,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:45:44,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 06:45:44,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:45:44,690 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-01-10 06:45:44,690 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:45:44,690 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:45:44,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1839272231] [2022-01-10 06:45:44,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1839272231] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:45:44,690 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:45:44,690 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-10 06:45:44,691 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285726033] [2022-01-10 06:45:44,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:45:44,691 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-10 06:45:44,691 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:45:44,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-10 06:45:44,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-01-10 06:45:44,692 INFO L87 Difference]: Start difference. First operand 2033 states and 2733 transitions. Second operand has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 6 states have internal predecessors, (92), 3 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2022-01-10 06:45:45,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:45:45,142 INFO L93 Difference]: Finished difference Result 4057 states and 5575 transitions. [2022-01-10 06:45:45,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-10 06:45:45,142 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 6 states have internal predecessors, (92), 3 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 115 [2022-01-10 06:45:45,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:45:45,153 INFO L225 Difference]: With dead ends: 4057 [2022-01-10 06:45:45,153 INFO L226 Difference]: Without dead ends: 2352 [2022-01-10 06:45:45,157 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-01-10 06:45:45,157 INFO L933 BasicCegarLoop]: 549 mSDtfsCounter, 729 mSDsluCounter, 1580 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 187 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 729 SdHoareTripleChecker+Valid, 2129 SdHoareTripleChecker+Invalid, 494 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 187 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 06:45:45,157 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [729 Valid, 2129 Invalid, 494 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [187 Valid, 307 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 06:45:45,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2352 states. [2022-01-10 06:45:45,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2352 to 1851. [2022-01-10 06:45:45,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1851 states, 1408 states have (on average 1.3352272727272727) internal successors, (1880), 1418 states have internal predecessors, (1880), 300 states have call successors, (300), 142 states have call predecessors, (300), 142 states have return successors, (300), 290 states have call predecessors, (300), 300 states have call successors, (300) [2022-01-10 06:45:45,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1851 states to 1851 states and 2480 transitions. [2022-01-10 06:45:45,259 INFO L78 Accepts]: Start accepts. Automaton has 1851 states and 2480 transitions. Word has length 115 [2022-01-10 06:45:45,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:45:45,260 INFO L470 AbstractCegarLoop]: Abstraction has 1851 states and 2480 transitions. [2022-01-10 06:45:45,260 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 6 states have internal predecessors, (92), 3 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2022-01-10 06:45:45,260 INFO L276 IsEmpty]: Start isEmpty. Operand 1851 states and 2480 transitions. [2022-01-10 06:45:45,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-01-10 06:45:45,262 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:45:45,262 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:45:45,273 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 06:45:45,471 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 06:45:45,471 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:45:45,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:45:45,472 INFO L85 PathProgramCache]: Analyzing trace with hash -1265431021, now seen corresponding path program 1 times [2022-01-10 06:45:45,472 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:45:45,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1107641020] [2022-01-10 06:45:45,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:45:45,472 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:45:45,472 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:45:45,473 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 06:45:45,485 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 06:45:45,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:45:45,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-10 06:45:45,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:45:45,796 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-01-10 06:45:45,796 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:45:46,008 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-01-10 06:45:46,009 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:45:46,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1107641020] [2022-01-10 06:45:46,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1107641020] provided 1 perfect and 1 imperfect interpolant sequences [2022-01-10 06:45:46,009 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-10 06:45:46,009 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 8 [2022-01-10 06:45:46,009 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120881714] [2022-01-10 06:45:46,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:45:46,010 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-10 06:45:46,010 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:45:46,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-10 06:45:46,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-01-10 06:45:46,011 INFO L87 Difference]: Start difference. First operand 1851 states and 2480 transitions. Second operand has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 6 states have internal predecessors, (87), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2022-01-10 06:45:46,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:45:46,276 INFO L93 Difference]: Finished difference Result 3655 states and 4974 transitions. [2022-01-10 06:45:46,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-10 06:45:46,277 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 6 states have internal predecessors, (87), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) Word has length 116 [2022-01-10 06:45:46,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:45:46,287 INFO L225 Difference]: With dead ends: 3655 [2022-01-10 06:45:46,287 INFO L226 Difference]: Without dead ends: 2322 [2022-01-10 06:45:46,290 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 224 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-01-10 06:45:46,291 INFO L933 BasicCegarLoop]: 532 mSDtfsCounter, 359 mSDsluCounter, 2265 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 375 SdHoareTripleChecker+Valid, 2797 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:45:46,291 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [375 Valid, 2797 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:45:46,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2322 states. [2022-01-10 06:45:46,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2322 to 1851. [2022-01-10 06:45:46,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1851 states, 1408 states have (on average 1.3316761363636365) internal successors, (1875), 1418 states have internal predecessors, (1875), 300 states have call successors, (300), 142 states have call predecessors, (300), 142 states have return successors, (300), 290 states have call predecessors, (300), 300 states have call successors, (300) [2022-01-10 06:45:46,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1851 states to 1851 states and 2475 transitions. [2022-01-10 06:45:46,393 INFO L78 Accepts]: Start accepts. Automaton has 1851 states and 2475 transitions. Word has length 116 [2022-01-10 06:45:46,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:45:46,394 INFO L470 AbstractCegarLoop]: Abstraction has 1851 states and 2475 transitions. [2022-01-10 06:45:46,394 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 6 states have internal predecessors, (87), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2022-01-10 06:45:46,394 INFO L276 IsEmpty]: Start isEmpty. Operand 1851 states and 2475 transitions. [2022-01-10 06:45:46,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-01-10 06:45:46,399 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:45:46,399 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:45:46,414 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 06:45:46,608 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 06:45:46,609 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:45:46,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:45:46,609 INFO L85 PathProgramCache]: Analyzing trace with hash 985009634, now seen corresponding path program 1 times [2022-01-10 06:45:46,609 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:45:46,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1175023616] [2022-01-10 06:45:46,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:45:46,610 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:45:46,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:45:46,611 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 06:45:46,611 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 06:45:46,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:45:46,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 06:45:46,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:45:46,896 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-10 06:45:46,896 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:45:46,896 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:45:46,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1175023616] [2022-01-10 06:45:46,896 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1175023616] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:45:46,896 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:45:46,896 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:45:46,896 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83620668] [2022-01-10 06:45:46,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:45:46,897 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 06:45:46,897 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:45:46,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 06:45:46,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 06:45:46,898 INFO L87 Difference]: Start difference. First operand 1851 states and 2475 transitions. Second operand has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-01-10 06:45:47,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:45:47,128 INFO L93 Difference]: Finished difference Result 4416 states and 5985 transitions. [2022-01-10 06:45:47,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 06:45:47,129 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 115 [2022-01-10 06:45:47,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:45:47,142 INFO L225 Difference]: With dead ends: 4416 [2022-01-10 06:45:47,143 INFO L226 Difference]: Without dead ends: 3144 [2022-01-10 06:45:47,147 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 113 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 06:45:47,149 INFO L933 BasicCegarLoop]: 497 mSDtfsCounter, 465 mSDsluCounter, 757 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 465 SdHoareTripleChecker+Valid, 1254 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:45:47,149 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [465 Valid, 1254 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:45:47,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3144 states. [2022-01-10 06:45:47,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3144 to 2780. [2022-01-10 06:45:47,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2780 states, 2098 states have (on average 1.3250714966634891) internal successors, (2780), 2114 states have internal predecessors, (2780), 464 states have call successors, (464), 217 states have call predecessors, (464), 217 states have return successors, (464), 448 states have call predecessors, (464), 464 states have call successors, (464) [2022-01-10 06:45:47,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2780 states to 2780 states and 3708 transitions. [2022-01-10 06:45:47,303 INFO L78 Accepts]: Start accepts. Automaton has 2780 states and 3708 transitions. Word has length 115 [2022-01-10 06:45:47,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:45:47,304 INFO L470 AbstractCegarLoop]: Abstraction has 2780 states and 3708 transitions. [2022-01-10 06:45:47,304 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-01-10 06:45:47,304 INFO L276 IsEmpty]: Start isEmpty. Operand 2780 states and 3708 transitions. [2022-01-10 06:45:47,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-01-10 06:45:47,306 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:45:47,306 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:45:47,319 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 06:45:47,515 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 06:45:47,516 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:45:47,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:45:47,516 INFO L85 PathProgramCache]: Analyzing trace with hash -1237817774, now seen corresponding path program 1 times [2022-01-10 06:45:47,516 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:45:47,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1892982928] [2022-01-10 06:45:47,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:45:47,516 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:45:47,516 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:45:47,517 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 06:45:47,518 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 06:45:47,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:45:47,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-10 06:45:47,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:45:47,792 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-10 06:45:47,792 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:45:47,792 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:45:47,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1892982928] [2022-01-10 06:45:47,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1892982928] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:45:47,792 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:45:47,792 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:45:47,792 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554130410] [2022-01-10 06:45:47,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:45:47,793 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 06:45:47,793 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:45:47,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 06:45:47,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:45:47,794 INFO L87 Difference]: Start difference. First operand 2780 states and 3708 transitions. Second operand has 5 states, 5 states have (on average 18.8) internal successors, (94), 4 states have internal predecessors, (94), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-01-10 06:45:48,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:45:48,093 INFO L93 Difference]: Finished difference Result 4746 states and 6344 transitions. [2022-01-10 06:45:48,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 06:45:48,095 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.8) internal successors, (94), 4 states have internal predecessors, (94), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 115 [2022-01-10 06:45:48,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:45:48,105 INFO L225 Difference]: With dead ends: 4746 [2022-01-10 06:45:48,105 INFO L226 Difference]: Without dead ends: 2319 [2022-01-10 06:45:48,110 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-01-10 06:45:48,111 INFO L933 BasicCegarLoop]: 317 mSDtfsCounter, 769 mSDsluCounter, 543 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 769 SdHoareTripleChecker+Valid, 860 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 06:45:48,111 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [769 Valid, 860 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 06:45:48,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2319 states. [2022-01-10 06:45:48,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2319 to 2295. [2022-01-10 06:45:48,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2295 states, 1734 states have (on average 1.3252595155709344) internal successors, (2298), 1747 states have internal predecessors, (2298), 378 states have call successors, (378), 182 states have call predecessors, (378), 182 states have return successors, (378), 365 states have call predecessors, (378), 378 states have call successors, (378) [2022-01-10 06:45:48,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2295 states to 2295 states and 3054 transitions. [2022-01-10 06:45:48,252 INFO L78 Accepts]: Start accepts. Automaton has 2295 states and 3054 transitions. Word has length 115 [2022-01-10 06:45:48,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:45:48,252 INFO L470 AbstractCegarLoop]: Abstraction has 2295 states and 3054 transitions. [2022-01-10 06:45:48,253 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.8) internal successors, (94), 4 states have internal predecessors, (94), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-01-10 06:45:48,253 INFO L276 IsEmpty]: Start isEmpty. Operand 2295 states and 3054 transitions. [2022-01-10 06:45:48,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-01-10 06:45:48,255 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:45:48,255 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:45:48,268 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 06:45:48,464 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 06:45:48,464 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:45:48,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:45:48,465 INFO L85 PathProgramCache]: Analyzing trace with hash -163928716, now seen corresponding path program 1 times [2022-01-10 06:45:48,465 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:45:48,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2064377605] [2022-01-10 06:45:48,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:45:48,465 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:45:48,465 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:45:48,466 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 06:45:48,467 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 06:45:48,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:45:48,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-10 06:45:48,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:45:48,760 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-10 06:45:48,761 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:45:48,959 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-01-10 06:45:48,959 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:45:48,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2064377605] [2022-01-10 06:45:48,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2064377605] provided 1 perfect and 1 imperfect interpolant sequences [2022-01-10 06:45:48,959 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-10 06:45:48,959 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 8 [2022-01-10 06:45:48,959 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749223141] [2022-01-10 06:45:48,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:45:48,960 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-10 06:45:48,960 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:45:48,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-10 06:45:48,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-01-10 06:45:48,961 INFO L87 Difference]: Start difference. First operand 2295 states and 3054 transitions. Second operand has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 6 states have internal predecessors, (90), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) [2022-01-10 06:45:49,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:45:49,249 INFO L93 Difference]: Finished difference Result 4916 states and 6706 transitions. [2022-01-10 06:45:49,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-10 06:45:49,250 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 6 states have internal predecessors, (90), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) Word has length 119 [2022-01-10 06:45:49,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:45:49,263 INFO L225 Difference]: With dead ends: 4916 [2022-01-10 06:45:49,263 INFO L226 Difference]: Without dead ends: 2944 [2022-01-10 06:45:49,269 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 230 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-01-10 06:45:49,270 INFO L933 BasicCegarLoop]: 487 mSDtfsCounter, 338 mSDsluCounter, 2125 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 355 SdHoareTripleChecker+Valid, 2612 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:45:49,270 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [355 Valid, 2612 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:45:49,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2944 states. [2022-01-10 06:45:49,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2944 to 2101. [2022-01-10 06:45:49,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2101 states, 1592 states have (on average 1.3241206030150754) internal successors, (2108), 1604 states have internal predecessors, (2108), 340 states have call successors, (340), 168 states have call predecessors, (340), 168 states have return successors, (340), 328 states have call predecessors, (340), 340 states have call successors, (340) [2022-01-10 06:45:49,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2101 states to 2101 states and 2788 transitions. [2022-01-10 06:45:49,401 INFO L78 Accepts]: Start accepts. Automaton has 2101 states and 2788 transitions. Word has length 119 [2022-01-10 06:45:49,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:45:49,401 INFO L470 AbstractCegarLoop]: Abstraction has 2101 states and 2788 transitions. [2022-01-10 06:45:49,401 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 6 states have internal predecessors, (90), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) [2022-01-10 06:45:49,401 INFO L276 IsEmpty]: Start isEmpty. Operand 2101 states and 2788 transitions. [2022-01-10 06:45:49,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-01-10 06:45:49,402 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:45:49,403 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:45:49,417 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 06:45:49,611 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 06:45:49,612 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:45:49,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:45:49,612 INFO L85 PathProgramCache]: Analyzing trace with hash 183157843, now seen corresponding path program 1 times [2022-01-10 06:45:49,612 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:45:49,613 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1105827385] [2022-01-10 06:45:49,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:45:49,613 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:45:49,613 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:45:49,614 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 06:45:49,614 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 06:45:49,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:45:49,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-10 06:45:49,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:45:49,919 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-10 06:45:49,919 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:45:49,919 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:45:49,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1105827385] [2022-01-10 06:45:49,920 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1105827385] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:45:49,920 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:45:49,920 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:45:49,920 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272853081] [2022-01-10 06:45:49,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:45:49,920 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 06:45:49,920 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:45:49,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 06:45:49,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:45:49,921 INFO L87 Difference]: Start difference. First operand 2101 states and 2788 transitions. Second operand has 5 states, 5 states have (on average 19.4) internal successors, (97), 4 states have internal predecessors, (97), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-01-10 06:45:50,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:45:50,180 INFO L93 Difference]: Finished difference Result 3931 states and 5249 transitions. [2022-01-10 06:45:50,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 06:45:50,180 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.4) internal successors, (97), 4 states have internal predecessors, (97), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 118 [2022-01-10 06:45:50,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:45:50,200 INFO L225 Difference]: With dead ends: 3931 [2022-01-10 06:45:50,200 INFO L226 Difference]: Without dead ends: 2026 [2022-01-10 06:45:50,203 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-01-10 06:45:50,203 INFO L933 BasicCegarLoop]: 273 mSDtfsCounter, 728 mSDsluCounter, 483 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 728 SdHoareTripleChecker+Valid, 756 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 06:45:50,207 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [728 Valid, 756 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 190 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 06:45:50,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2026 states. [2022-01-10 06:45:50,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2026 to 1902. [2022-01-10 06:45:50,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1902 states, 1435 states have (on average 1.318466898954704) internal successors, (1892), 1446 states have internal predecessors, (1892), 311 states have call successors, (311), 155 states have call predecessors, (311), 155 states have return successors, (311), 300 states have call predecessors, (311), 311 states have call successors, (311) [2022-01-10 06:45:50,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1902 states to 1902 states and 2514 transitions. [2022-01-10 06:45:50,337 INFO L78 Accepts]: Start accepts. Automaton has 1902 states and 2514 transitions. Word has length 118 [2022-01-10 06:45:50,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:45:50,338 INFO L470 AbstractCegarLoop]: Abstraction has 1902 states and 2514 transitions. [2022-01-10 06:45:50,338 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.4) internal successors, (97), 4 states have internal predecessors, (97), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-01-10 06:45:50,338 INFO L276 IsEmpty]: Start isEmpty. Operand 1902 states and 2514 transitions. [2022-01-10 06:45:50,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-01-10 06:45:50,339 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:45:50,339 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:45:50,350 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 06:45:50,548 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 06:45:50,548 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:45:50,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:45:50,548 INFO L85 PathProgramCache]: Analyzing trace with hash 898072227, now seen corresponding path program 1 times [2022-01-10 06:45:50,549 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:45:50,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1970915359] [2022-01-10 06:45:50,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:45:50,549 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:45:50,549 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:45:50,550 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 06:45:50,552 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 06:45:50,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:45:50,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 06:45:50,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:45:50,775 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-01-10 06:45:50,776 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:45:50,776 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:45:50,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1970915359] [2022-01-10 06:45:50,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1970915359] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:45:50,776 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:45:50,776 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:45:50,776 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298622992] [2022-01-10 06:45:50,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:45:50,777 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 06:45:50,777 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:45:50,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 06:45:50,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 06:45:50,777 INFO L87 Difference]: Start difference. First operand 1902 states and 2514 transitions. Second operand has 4 states, 4 states have (on average 22.75) internal successors, (91), 3 states have internal predecessors, (91), 2 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 1 states have call predecessors, (9), 1 states have call successors, (9) [2022-01-10 06:45:50,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:45:50,855 INFO L93 Difference]: Finished difference Result 3638 states and 4849 transitions. [2022-01-10 06:45:50,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 06:45:50,855 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 3 states have internal predecessors, (91), 2 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 1 states have call predecessors, (9), 1 states have call successors, (9) Word has length 124 [2022-01-10 06:45:50,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:45:50,861 INFO L225 Difference]: With dead ends: 3638 [2022-01-10 06:45:50,861 INFO L226 Difference]: Without dead ends: 1998 [2022-01-10 06:45:50,865 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 122 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 06:45:50,865 INFO L933 BasicCegarLoop]: 293 mSDtfsCounter, 8 mSDsluCounter, 577 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 870 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:45:50,866 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 870 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:45:50,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1998 states. [2022-01-10 06:45:50,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1998 to 1974. [2022-01-10 06:45:50,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1974 states, 1495 states have (on average 1.305685618729097) internal successors, (1952), 1506 states have internal predecessors, (1952), 311 states have call successors, (311), 167 states have call predecessors, (311), 167 states have return successors, (311), 300 states have call predecessors, (311), 311 states have call successors, (311) [2022-01-10 06:45:50,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1974 states to 1974 states and 2574 transitions. [2022-01-10 06:45:50,967 INFO L78 Accepts]: Start accepts. Automaton has 1974 states and 2574 transitions. Word has length 124 [2022-01-10 06:45:50,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:45:50,967 INFO L470 AbstractCegarLoop]: Abstraction has 1974 states and 2574 transitions. [2022-01-10 06:45:50,968 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 3 states have internal predecessors, (91), 2 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 1 states have call predecessors, (9), 1 states have call successors, (9) [2022-01-10 06:45:50,968 INFO L276 IsEmpty]: Start isEmpty. Operand 1974 states and 2574 transitions. [2022-01-10 06:45:50,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-01-10 06:45:50,969 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:45:50,969 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:45:50,979 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 06:45:51,178 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 06:45:51,178 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:45:51,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:45:51,179 INFO L85 PathProgramCache]: Analyzing trace with hash 699183706, now seen corresponding path program 1 times [2022-01-10 06:45:51,179 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:45:51,179 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1899656224] [2022-01-10 06:45:51,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:45:51,179 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:45:51,179 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:45:51,180 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 06:45:51,188 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 06:45:51,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:45:51,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-10 06:45:51,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:45:51,498 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-01-10 06:45:51,499 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:45:51,704 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-01-10 06:45:51,704 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:45:51,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1899656224] [2022-01-10 06:45:51,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1899656224] provided 1 perfect and 1 imperfect interpolant sequences [2022-01-10 06:45:51,704 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-10 06:45:51,704 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 8 [2022-01-10 06:45:51,705 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989324133] [2022-01-10 06:45:51,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:45:51,705 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-10 06:45:51,705 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:45:51,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-10 06:45:51,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-01-10 06:45:51,706 INFO L87 Difference]: Start difference. First operand 1974 states and 2574 transitions. Second operand has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 6 states have internal predecessors, (90), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) [2022-01-10 06:45:51,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:45:51,945 INFO L93 Difference]: Finished difference Result 4176 states and 5575 transitions. [2022-01-10 06:45:51,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-10 06:45:51,945 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 6 states have internal predecessors, (90), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) Word has length 127 [2022-01-10 06:45:51,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:45:51,954 INFO L225 Difference]: With dead ends: 4176 [2022-01-10 06:45:51,954 INFO L226 Difference]: Without dead ends: 2428 [2022-01-10 06:45:51,957 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 246 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-01-10 06:45:51,957 INFO L933 BasicCegarLoop]: 377 mSDtfsCounter, 388 mSDsluCounter, 1691 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 402 SdHoareTripleChecker+Valid, 2068 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:45:51,959 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [402 Valid, 2068 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:45:51,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2428 states. [2022-01-10 06:45:52,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2428 to 1953. [2022-01-10 06:45:52,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1953 states, 1480 states have (on average 1.302027027027027) internal successors, (1927), 1491 states have internal predecessors, (1927), 305 states have call successors, (305), 167 states have call predecessors, (305), 167 states have return successors, (305), 294 states have call predecessors, (305), 305 states have call successors, (305) [2022-01-10 06:45:52,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1953 states to 1953 states and 2537 transitions. [2022-01-10 06:45:52,067 INFO L78 Accepts]: Start accepts. Automaton has 1953 states and 2537 transitions. Word has length 127 [2022-01-10 06:45:52,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:45:52,068 INFO L470 AbstractCegarLoop]: Abstraction has 1953 states and 2537 transitions. [2022-01-10 06:45:52,068 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 6 states have internal predecessors, (90), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) [2022-01-10 06:45:52,068 INFO L276 IsEmpty]: Start isEmpty. Operand 1953 states and 2537 transitions. [2022-01-10 06:45:52,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-01-10 06:45:52,069 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:45:52,069 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:45:52,078 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Ended with exit code 0 [2022-01-10 06:45:52,278 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 06:45:52,278 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:45:52,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:45:52,278 INFO L85 PathProgramCache]: Analyzing trace with hash -1680613892, now seen corresponding path program 1 times [2022-01-10 06:45:52,279 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:45:52,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1420337362] [2022-01-10 06:45:52,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:45:52,279 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:45:52,279 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:45:52,281 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 06:45:52,281 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 06:45:52,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:45:52,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-10 06:45:52,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:45:52,528 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-01-10 06:45:52,528 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:45:52,528 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:45:52,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1420337362] [2022-01-10 06:45:52,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1420337362] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:45:52,528 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:45:52,528 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-10 06:45:52,528 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703485908] [2022-01-10 06:45:52,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:45:52,529 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 06:45:52,529 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:45:52,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 06:45:52,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-01-10 06:45:52,529 INFO L87 Difference]: Start difference. First operand 1953 states and 2537 transitions. Second operand has 6 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) [2022-01-10 06:45:52,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:45:52,717 INFO L93 Difference]: Finished difference Result 2808 states and 3851 transitions. [2022-01-10 06:45:52,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 06:45:52,717 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) Word has length 130 [2022-01-10 06:45:52,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:45:52,726 INFO L225 Difference]: With dead ends: 2808 [2022-01-10 06:45:52,726 INFO L226 Difference]: Without dead ends: 2806 [2022-01-10 06:45:52,727 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-01-10 06:45:52,727 INFO L933 BasicCegarLoop]: 439 mSDtfsCounter, 262 mSDsluCounter, 1547 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 284 SdHoareTripleChecker+Valid, 1986 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:45:52,728 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [284 Valid, 1986 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:45:52,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2806 states. [2022-01-10 06:45:52,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2806 to 1948. [2022-01-10 06:45:52,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1948 states, 1473 states have (on average 1.3034623217922607) internal successors, (1920), 1485 states have internal predecessors, (1920), 306 states have call successors, (306), 168 states have call predecessors, (306), 168 states have return successors, (306), 294 states have call predecessors, (306), 306 states have call successors, (306) [2022-01-10 06:45:52,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1948 states to 1948 states and 2532 transitions. [2022-01-10 06:45:52,856 INFO L78 Accepts]: Start accepts. Automaton has 1948 states and 2532 transitions. Word has length 130 [2022-01-10 06:45:52,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:45:52,858 INFO L470 AbstractCegarLoop]: Abstraction has 1948 states and 2532 transitions. [2022-01-10 06:45:52,858 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) [2022-01-10 06:45:52,858 INFO L276 IsEmpty]: Start isEmpty. Operand 1948 states and 2532 transitions. [2022-01-10 06:45:52,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-01-10 06:45:52,859 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:45:52,859 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:45:52,868 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 06:45:53,068 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 06:45:53,068 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:45:53,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:45:53,069 INFO L85 PathProgramCache]: Analyzing trace with hash -2145986412, now seen corresponding path program 1 times [2022-01-10 06:45:53,069 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:45:53,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [566402053] [2022-01-10 06:45:53,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:45:53,069 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:45:53,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:45:53,070 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 06:45:53,071 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 06:45:53,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:45:53,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-10 06:45:53,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:45:53,416 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-01-10 06:45:53,416 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:45:53,676 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-01-10 06:45:53,676 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:45:53,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [566402053] [2022-01-10 06:45:53,677 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [566402053] provided 1 perfect and 1 imperfect interpolant sequences [2022-01-10 06:45:53,677 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-10 06:45:53,677 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2022-01-10 06:45:53,677 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989487627] [2022-01-10 06:45:53,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:45:53,677 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-10 06:45:53,677 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:45:53,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-10 06:45:53,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2022-01-10 06:45:53,678 INFO L87 Difference]: Start difference. First operand 1948 states and 2532 transitions. Second operand has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 6 states have internal predecessors, (97), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2022-01-10 06:45:53,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:45:53,910 INFO L93 Difference]: Finished difference Result 3941 states and 5226 transitions. [2022-01-10 06:45:53,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-10 06:45:53,911 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 6 states have internal predecessors, (97), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) Word has length 133 [2022-01-10 06:45:53,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:45:53,917 INFO L225 Difference]: With dead ends: 3941 [2022-01-10 06:45:53,917 INFO L226 Difference]: Without dead ends: 2258 [2022-01-10 06:45:53,920 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 256 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2022-01-10 06:45:53,920 INFO L933 BasicCegarLoop]: 367 mSDtfsCounter, 425 mSDsluCounter, 1671 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 430 SdHoareTripleChecker+Valid, 2038 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:45:53,920 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [430 Valid, 2038 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:45:53,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2258 states. [2022-01-10 06:45:54,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2258 to 1746. [2022-01-10 06:45:54,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1746 states, 1329 states have (on average 1.2957110609480813) internal successors, (1722), 1340 states have internal predecessors, (1722), 268 states have call successors, (268), 148 states have call predecessors, (268), 148 states have return successors, (268), 257 states have call predecessors, (268), 268 states have call successors, (268) [2022-01-10 06:45:54,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1746 states to 1746 states and 2258 transitions. [2022-01-10 06:45:54,026 INFO L78 Accepts]: Start accepts. Automaton has 1746 states and 2258 transitions. Word has length 133 [2022-01-10 06:45:54,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:45:54,027 INFO L470 AbstractCegarLoop]: Abstraction has 1746 states and 2258 transitions. [2022-01-10 06:45:54,027 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 6 states have internal predecessors, (97), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2022-01-10 06:45:54,027 INFO L276 IsEmpty]: Start isEmpty. Operand 1746 states and 2258 transitions. [2022-01-10 06:45:54,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2022-01-10 06:45:54,030 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:45:54,030 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:45:54,039 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Ended with exit code 0 [2022-01-10 06:45:54,239 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 06:45:54,240 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:45:54,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:45:54,240 INFO L85 PathProgramCache]: Analyzing trace with hash -1459364186, now seen corresponding path program 1 times [2022-01-10 06:45:54,241 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:45:54,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1926769213] [2022-01-10 06:45:54,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:45:54,241 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:45:54,241 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:45:54,242 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 06:45:54,245 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 06:45:54,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:45:54,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 463 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-10 06:45:54,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:45:55,001 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 75 proven. 17 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-01-10 06:45:55,001 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:45:55,378 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 22 proven. 9 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2022-01-10 06:45:55,379 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:45:55,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1926769213] [2022-01-10 06:45:55,379 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1926769213] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:45:55,379 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:45:55,379 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 18 [2022-01-10 06:45:55,379 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410345336] [2022-01-10 06:45:55,379 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:45:55,379 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-10 06:45:55,380 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:45:55,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-10 06:45:55,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2022-01-10 06:45:55,380 INFO L87 Difference]: Start difference. First operand 1746 states and 2258 transitions. Second operand has 18 states, 18 states have (on average 14.833333333333334) internal successors, (267), 18 states have internal predecessors, (267), 7 states have call successors, (35), 5 states have call predecessors, (35), 5 states have return successors, (34), 7 states have call predecessors, (34), 7 states have call successors, (34) [2022-01-10 06:45:58,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:45:58,367 INFO L93 Difference]: Finished difference Result 4932 states and 6685 transitions. [2022-01-10 06:45:58,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-01-10 06:45:58,367 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 14.833333333333334) internal successors, (267), 18 states have internal predecessors, (267), 7 states have call successors, (35), 5 states have call predecessors, (35), 5 states have return successors, (34), 7 states have call predecessors, (34), 7 states have call successors, (34) Word has length 210 [2022-01-10 06:45:58,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:45:58,378 INFO L225 Difference]: With dead ends: 4932 [2022-01-10 06:45:58,378 INFO L226 Difference]: Without dead ends: 3459 [2022-01-10 06:45:58,383 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 469 GetRequests, 403 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1121 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=820, Invalid=3470, Unknown=0, NotChecked=0, Total=4290 [2022-01-10 06:45:58,383 INFO L933 BasicCegarLoop]: 438 mSDtfsCounter, 3257 mSDsluCounter, 3432 mSDsCounter, 0 mSdLazyCounter, 2981 mSolverCounterSat, 1061 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3257 SdHoareTripleChecker+Valid, 3870 SdHoareTripleChecker+Invalid, 4042 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1061 IncrementalHoareTripleChecker+Valid, 2981 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:45:58,383 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3257 Valid, 3870 Invalid, 4042 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1061 Valid, 2981 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-01-10 06:45:58,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3459 states. [2022-01-10 06:45:58,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3459 to 2337. [2022-01-10 06:45:58,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2337 states, 1774 states have (on average 1.2891770011273957) internal successors, (2287), 1788 states have internal predecessors, (2287), 358 states have call successors, (358), 204 states have call predecessors, (358), 204 states have return successors, (358), 344 states have call predecessors, (358), 358 states have call successors, (358) [2022-01-10 06:45:58,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2337 states to 2337 states and 3003 transitions. [2022-01-10 06:45:58,570 INFO L78 Accepts]: Start accepts. Automaton has 2337 states and 3003 transitions. Word has length 210 [2022-01-10 06:45:58,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:45:58,570 INFO L470 AbstractCegarLoop]: Abstraction has 2337 states and 3003 transitions. [2022-01-10 06:45:58,570 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 14.833333333333334) internal successors, (267), 18 states have internal predecessors, (267), 7 states have call successors, (35), 5 states have call predecessors, (35), 5 states have return successors, (34), 7 states have call predecessors, (34), 7 states have call successors, (34) [2022-01-10 06:45:58,571 INFO L276 IsEmpty]: Start isEmpty. Operand 2337 states and 3003 transitions. [2022-01-10 06:45:58,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2022-01-10 06:45:58,574 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:45:58,574 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-01-10 06:45:58,584 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 06:45:58,784 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 06:45:58,784 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:45:58,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:45:58,784 INFO L85 PathProgramCache]: Analyzing trace with hash 1284782518, now seen corresponding path program 1 times [2022-01-10 06:45:58,785 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:45:58,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1948137376] [2022-01-10 06:45:58,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:45:58,785 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:45:58,785 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:45:58,786 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 06:45:58,786 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 06:45:58,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:45:58,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 464 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-10 06:45:58,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:45:59,502 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 79 proven. 27 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-01-10 06:45:59,502 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:45:59,912 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 26 proven. 19 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2022-01-10 06:45:59,913 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:45:59,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1948137376] [2022-01-10 06:45:59,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1948137376] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:45:59,913 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:45:59,913 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 18 [2022-01-10 06:45:59,913 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89613158] [2022-01-10 06:45:59,913 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:45:59,914 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-10 06:45:59,915 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:45:59,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-10 06:45:59,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2022-01-10 06:45:59,915 INFO L87 Difference]: Start difference. First operand 2337 states and 3003 transitions. Second operand has 18 states, 18 states have (on average 15.38888888888889) internal successors, (277), 18 states have internal predecessors, (277), 7 states have call successors, (35), 5 states have call predecessors, (35), 5 states have return successors, (34), 7 states have call predecessors, (34), 7 states have call successors, (34) [2022-01-10 06:46:03,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:46:03,521 INFO L93 Difference]: Finished difference Result 7058 states and 9555 transitions. [2022-01-10 06:46:03,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-01-10 06:46:03,522 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 15.38888888888889) internal successors, (277), 18 states have internal predecessors, (277), 7 states have call successors, (35), 5 states have call predecessors, (35), 5 states have return successors, (34), 7 states have call predecessors, (34), 7 states have call successors, (34) Word has length 211 [2022-01-10 06:46:03,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:46:03,536 INFO L225 Difference]: With dead ends: 7058 [2022-01-10 06:46:03,537 INFO L226 Difference]: Without dead ends: 5078 [2022-01-10 06:46:03,542 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 477 GetRequests, 407 SyntacticMatches, 2 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1303 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=946, Invalid=3884, Unknown=0, NotChecked=0, Total=4830 [2022-01-10 06:46:03,543 INFO L933 BasicCegarLoop]: 463 mSDtfsCounter, 3186 mSDsluCounter, 4066 mSDsCounter, 0 mSdLazyCounter, 3534 mSolverCounterSat, 1667 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3186 SdHoareTripleChecker+Valid, 4529 SdHoareTripleChecker+Invalid, 5201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1667 IncrementalHoareTripleChecker+Valid, 3534 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-01-10 06:46:03,543 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3186 Valid, 4529 Invalid, 5201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1667 Valid, 3534 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-01-10 06:46:03,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5078 states. [2022-01-10 06:46:03,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5078 to 3321. [2022-01-10 06:46:03,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3321 states, 2530 states have (on average 1.2830039525691699) internal successors, (3246), 2550 states have internal predecessors, (3246), 498 states have call successors, (498), 292 states have call predecessors, (498), 292 states have return successors, (498), 478 states have call predecessors, (498), 498 states have call successors, (498) [2022-01-10 06:46:03,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3321 states to 3321 states and 4242 transitions. [2022-01-10 06:46:03,857 INFO L78 Accepts]: Start accepts. Automaton has 3321 states and 4242 transitions. Word has length 211 [2022-01-10 06:46:03,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:46:03,857 INFO L470 AbstractCegarLoop]: Abstraction has 3321 states and 4242 transitions. [2022-01-10 06:46:03,858 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 15.38888888888889) internal successors, (277), 18 states have internal predecessors, (277), 7 states have call successors, (35), 5 states have call predecessors, (35), 5 states have return successors, (34), 7 states have call predecessors, (34), 7 states have call successors, (34) [2022-01-10 06:46:03,858 INFO L276 IsEmpty]: Start isEmpty. Operand 3321 states and 4242 transitions. [2022-01-10 06:46:03,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2022-01-10 06:46:03,863 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:46:03,864 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:46:03,874 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 06:46:04,073 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 06:46:04,073 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:46:04,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:46:04,074 INFO L85 PathProgramCache]: Analyzing trace with hash 1437816907, now seen corresponding path program 1 times [2022-01-10 06:46:04,074 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:46:04,074 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [416726101] [2022-01-10 06:46:04,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:46:04,075 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:46:04,075 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:46:04,075 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 06:46:04,076 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 06:46:04,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:46:04,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-10 06:46:04,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:46:04,528 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 64 proven. 28 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-01-10 06:46:04,529 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:46:04,871 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 15 proven. 16 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2022-01-10 06:46:04,871 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:46:04,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [416726101] [2022-01-10 06:46:04,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [416726101] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:46:04,871 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:46:04,871 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 12 [2022-01-10 06:46:04,871 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612826482] [2022-01-10 06:46:04,871 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:46:04,872 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-10 06:46:04,872 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:46:04,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-10 06:46:04,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2022-01-10 06:46:04,873 INFO L87 Difference]: Start difference. First operand 3321 states and 4242 transitions. Second operand has 12 states, 12 states have (on average 24.166666666666668) internal successors, (290), 12 states have internal predecessors, (290), 7 states have call successors, (35), 5 states have call predecessors, (35), 5 states have return successors, (34), 7 states have call predecessors, (34), 7 states have call successors, (34) [2022-01-10 06:46:06,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:46:06,374 INFO L93 Difference]: Finished difference Result 9408 states and 12896 transitions. [2022-01-10 06:46:06,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-10 06:46:06,384 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 24.166666666666668) internal successors, (290), 12 states have internal predecessors, (290), 7 states have call successors, (35), 5 states have call predecessors, (35), 5 states have return successors, (34), 7 states have call predecessors, (34), 7 states have call successors, (34) Word has length 212 [2022-01-10 06:46:06,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:46:06,404 INFO L225 Difference]: With dead ends: 9408 [2022-01-10 06:46:06,405 INFO L226 Difference]: Without dead ends: 6586 [2022-01-10 06:46:06,411 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 444 GetRequests, 414 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=251, Invalid=619, Unknown=0, NotChecked=0, Total=870 [2022-01-10 06:46:06,412 INFO L933 BasicCegarLoop]: 425 mSDtfsCounter, 2022 mSDsluCounter, 1961 mSDsCounter, 0 mSdLazyCounter, 859 mSolverCounterSat, 894 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2022 SdHoareTripleChecker+Valid, 2386 SdHoareTripleChecker+Invalid, 1753 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 894 IncrementalHoareTripleChecker+Valid, 859 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-10 06:46:06,412 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2022 Valid, 2386 Invalid, 1753 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [894 Valid, 859 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-10 06:46:06,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6586 states. [2022-01-10 06:46:06,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6586 to 3628. [2022-01-10 06:46:06,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3628 states, 2801 states have (on average 1.2834701892181364) internal successors, (3595), 2821 states have internal predecessors, (3595), 516 states have call successors, (516), 310 states have call predecessors, (516), 310 states have return successors, (516), 496 states have call predecessors, (516), 516 states have call successors, (516) [2022-01-10 06:46:06,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3628 states to 3628 states and 4627 transitions. [2022-01-10 06:46:06,759 INFO L78 Accepts]: Start accepts. Automaton has 3628 states and 4627 transitions. Word has length 212 [2022-01-10 06:46:06,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:46:06,760 INFO L470 AbstractCegarLoop]: Abstraction has 3628 states and 4627 transitions. [2022-01-10 06:46:06,760 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 24.166666666666668) internal successors, (290), 12 states have internal predecessors, (290), 7 states have call successors, (35), 5 states have call predecessors, (35), 5 states have return successors, (34), 7 states have call predecessors, (34), 7 states have call successors, (34) [2022-01-10 06:46:06,760 INFO L276 IsEmpty]: Start isEmpty. Operand 3628 states and 4627 transitions. [2022-01-10 06:46:06,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2022-01-10 06:46:06,766 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:46:06,766 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:46:06,776 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 06:46:06,976 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 06:46:06,976 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:46:06,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:46:06,976 INFO L85 PathProgramCache]: Analyzing trace with hash -1209328476, now seen corresponding path program 1 times [2022-01-10 06:46:06,977 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:46:06,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1554541911] [2022-01-10 06:46:06,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:46:06,977 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:46:06,977 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:46:06,978 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 06:46:06,979 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 06:46:07,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:46:07,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 466 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-10 06:46:07,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:46:07,436 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 80 proven. 13 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-01-10 06:46:07,437 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:46:07,750 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 27 proven. 5 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2022-01-10 06:46:07,751 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:46:07,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1554541911] [2022-01-10 06:46:07,751 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1554541911] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:46:07,751 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:46:07,751 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2022-01-10 06:46:07,751 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068505871] [2022-01-10 06:46:07,751 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:46:07,752 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-10 06:46:07,752 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:46:07,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-10 06:46:07,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2022-01-10 06:46:07,752 INFO L87 Difference]: Start difference. First operand 3628 states and 4627 transitions. Second operand has 12 states, 12 states have (on average 21.25) internal successors, (255), 12 states have internal predecessors, (255), 6 states have call successors, (34), 4 states have call predecessors, (34), 4 states have return successors, (33), 6 states have call predecessors, (33), 6 states have call successors, (33) [2022-01-10 06:46:09,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:46:09,447 INFO L93 Difference]: Finished difference Result 14637 states and 19964 transitions. [2022-01-10 06:46:09,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-10 06:46:09,448 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 21.25) internal successors, (255), 12 states have internal predecessors, (255), 6 states have call successors, (34), 4 states have call predecessors, (34), 4 states have return successors, (33), 6 states have call predecessors, (33), 6 states have call successors, (33) Word has length 213 [2022-01-10 06:46:09,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:46:09,481 INFO L225 Difference]: With dead ends: 14637 [2022-01-10 06:46:09,482 INFO L226 Difference]: Without dead ends: 11508 [2022-01-10 06:46:09,490 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 451 GetRequests, 421 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=239, Invalid=753, Unknown=0, NotChecked=0, Total=992 [2022-01-10 06:46:09,491 INFO L933 BasicCegarLoop]: 768 mSDtfsCounter, 1523 mSDsluCounter, 6476 mSDsCounter, 0 mSdLazyCounter, 889 mSolverCounterSat, 302 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1598 SdHoareTripleChecker+Valid, 7244 SdHoareTripleChecker+Invalid, 1191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 302 IncrementalHoareTripleChecker+Valid, 889 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-10 06:46:09,491 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1598 Valid, 7244 Invalid, 1191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [302 Valid, 889 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-10 06:46:09,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11508 states. [2022-01-10 06:46:10,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11508 to 6201. [2022-01-10 06:46:10,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6201 states, 4843 states have (on average 1.2717323972744168) internal successors, (6159), 4873 states have internal predecessors, (6159), 833 states have call successors, (833), 524 states have call predecessors, (833), 524 states have return successors, (833), 803 states have call predecessors, (833), 833 states have call successors, (833) [2022-01-10 06:46:10,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6201 states to 6201 states and 7825 transitions. [2022-01-10 06:46:10,146 INFO L78 Accepts]: Start accepts. Automaton has 6201 states and 7825 transitions. Word has length 213 [2022-01-10 06:46:10,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:46:10,147 INFO L470 AbstractCegarLoop]: Abstraction has 6201 states and 7825 transitions. [2022-01-10 06:46:10,147 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 21.25) internal successors, (255), 12 states have internal predecessors, (255), 6 states have call successors, (34), 4 states have call predecessors, (34), 4 states have return successors, (33), 6 states have call predecessors, (33), 6 states have call successors, (33) [2022-01-10 06:46:10,147 INFO L276 IsEmpty]: Start isEmpty. Operand 6201 states and 7825 transitions. [2022-01-10 06:46:10,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2022-01-10 06:46:10,157 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:46:10,157 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:46:10,167 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2022-01-10 06:46:10,367 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 06:46:10,367 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:46:10,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:46:10,368 INFO L85 PathProgramCache]: Analyzing trace with hash -1119268186, now seen corresponding path program 1 times [2022-01-10 06:46:10,368 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:46:10,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1483048418] [2022-01-10 06:46:10,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:46:10,369 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:46:10,369 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:46:10,370 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 06:46:10,371 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 06:46:10,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:46:10,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 06:46:10,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:46:10,875 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2022-01-10 06:46:10,875 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:46:10,875 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:46:10,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1483048418] [2022-01-10 06:46:10,876 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1483048418] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:46:10,876 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:46:10,876 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:46:10,876 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843919218] [2022-01-10 06:46:10,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:46:10,876 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 06:46:10,876 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:46:10,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 06:46:10,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:46:10,877 INFO L87 Difference]: Start difference. First operand 6201 states and 7825 transitions. Second operand has 5 states, 5 states have (on average 27.0) internal successors, (135), 4 states have internal predecessors, (135), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-01-10 06:46:11,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:46:11,381 INFO L93 Difference]: Finished difference Result 10173 states and 12998 transitions. [2022-01-10 06:46:11,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 06:46:11,381 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 27.0) internal successors, (135), 4 states have internal predecessors, (135), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 213 [2022-01-10 06:46:11,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:46:11,393 INFO L225 Difference]: With dead ends: 10173 [2022-01-10 06:46:11,393 INFO L226 Difference]: Without dead ends: 4471 [2022-01-10 06:46:11,401 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 209 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:46:11,402 INFO L933 BasicCegarLoop]: 254 mSDtfsCounter, 289 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 289 SdHoareTripleChecker+Valid, 442 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:46:11,402 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [289 Valid, 442 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:46:11,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4471 states. [2022-01-10 06:46:11,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4471 to 4471. [2022-01-10 06:46:11,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4471 states, 3516 states have (on average 1.280716723549488) internal successors, (4503), 3537 states have internal predecessors, (4503), 587 states have call successors, (587), 367 states have call predecessors, (587), 367 states have return successors, (587), 566 states have call predecessors, (587), 587 states have call successors, (587) [2022-01-10 06:46:11,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4471 states to 4471 states and 5677 transitions. [2022-01-10 06:46:11,795 INFO L78 Accepts]: Start accepts. Automaton has 4471 states and 5677 transitions. Word has length 213 [2022-01-10 06:46:11,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:46:11,795 INFO L470 AbstractCegarLoop]: Abstraction has 4471 states and 5677 transitions. [2022-01-10 06:46:11,795 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.0) internal successors, (135), 4 states have internal predecessors, (135), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-01-10 06:46:11,796 INFO L276 IsEmpty]: Start isEmpty. Operand 4471 states and 5677 transitions. [2022-01-10 06:46:11,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2022-01-10 06:46:11,802 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:46:11,802 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:46:11,817 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 06:46:12,012 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 06:46:12,012 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:46:12,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:46:12,013 INFO L85 PathProgramCache]: Analyzing trace with hash -488478373, now seen corresponding path program 1 times [2022-01-10 06:46:12,013 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:46:12,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [993115770] [2022-01-10 06:46:12,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:46:12,013 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:46:12,014 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:46:12,015 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 06:46:12,016 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 06:46:12,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:46:12,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 469 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 06:46:12,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:46:12,569 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-01-10 06:46:12,569 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:46:12,569 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:46:12,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [993115770] [2022-01-10 06:46:12,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [993115770] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:46:12,569 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:46:12,570 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-10 06:46:12,570 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665246748] [2022-01-10 06:46:12,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:46:12,570 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-10 06:46:12,570 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:46:12,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-10 06:46:12,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-01-10 06:46:12,571 INFO L87 Difference]: Start difference. First operand 4471 states and 5677 transitions. Second operand has 7 states, 7 states have (on average 21.0) internal successors, (147), 6 states have internal predecessors, (147), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) [2022-01-10 06:46:13,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:46:13,701 INFO L93 Difference]: Finished difference Result 16155 states and 21528 transitions. [2022-01-10 06:46:13,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-10 06:46:13,702 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 21.0) internal successors, (147), 6 states have internal predecessors, (147), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) Word has length 216 [2022-01-10 06:46:13,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:46:13,735 INFO L225 Difference]: With dead ends: 16155 [2022-01-10 06:46:13,735 INFO L226 Difference]: Without dead ends: 12194 [2022-01-10 06:46:13,745 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 213 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2022-01-10 06:46:13,745 INFO L933 BasicCegarLoop]: 471 mSDtfsCounter, 839 mSDsluCounter, 2214 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 857 SdHoareTripleChecker+Valid, 2685 SdHoareTripleChecker+Invalid, 350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 06:46:13,745 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [857 Valid, 2685 Invalid, 350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 247 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 06:46:13,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12194 states. [2022-01-10 06:46:14,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12194 to 6413. [2022-01-10 06:46:14,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6413 states, 4920 states have (on average 1.2845528455284554) internal successors, (6320), 4955 states have internal predecessors, (6320), 945 states have call successors, (945), 547 states have call predecessors, (945), 547 states have return successors, (945), 910 states have call predecessors, (945), 945 states have call successors, (945) [2022-01-10 06:46:14,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6413 states to 6413 states and 8210 transitions. [2022-01-10 06:46:14,412 INFO L78 Accepts]: Start accepts. Automaton has 6413 states and 8210 transitions. Word has length 216 [2022-01-10 06:46:14,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:46:14,413 INFO L470 AbstractCegarLoop]: Abstraction has 6413 states and 8210 transitions. [2022-01-10 06:46:14,413 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.0) internal successors, (147), 6 states have internal predecessors, (147), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) [2022-01-10 06:46:14,413 INFO L276 IsEmpty]: Start isEmpty. Operand 6413 states and 8210 transitions. [2022-01-10 06:46:14,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2022-01-10 06:46:14,421 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:46:14,421 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 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, 2, 2, 2, 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] [2022-01-10 06:46:14,430 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (35)] Ended with exit code 0 [2022-01-10 06:46:14,630 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 06:46:14,630 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:46:14,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:46:14,631 INFO L85 PathProgramCache]: Analyzing trace with hash -544427558, now seen corresponding path program 1 times [2022-01-10 06:46:14,631 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:46:14,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1124178864] [2022-01-10 06:46:14,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:46:14,632 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:46:14,632 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:46:14,633 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 06:46:14,635 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 06:46:14,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:46:14,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 473 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-10 06:46:14,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:46:15,072 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 99 proven. 4 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-01-10 06:46:15,072 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:46:15,427 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 39 proven. 4 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2022-01-10 06:46:15,427 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:46:15,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1124178864] [2022-01-10 06:46:15,427 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1124178864] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:46:15,427 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:46:15,427 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2022-01-10 06:46:15,427 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810132611] [2022-01-10 06:46:15,428 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:46:15,428 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-10 06:46:15,428 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:46:15,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-10 06:46:15,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-01-10 06:46:15,429 INFO L87 Difference]: Start difference. First operand 6413 states and 8210 transitions. Second operand has 8 states, 8 states have (on average 23.125) internal successors, (185), 7 states have internal predecessors, (185), 3 states have call successors, (34), 4 states have call predecessors, (34), 6 states have return successors, (34), 4 states have call predecessors, (34), 3 states have call successors, (34) [2022-01-10 06:46:16,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:46:16,105 INFO L93 Difference]: Finished difference Result 13866 states and 18157 transitions. [2022-01-10 06:46:16,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-10 06:46:16,105 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 23.125) internal successors, (185), 7 states have internal predecessors, (185), 3 states have call successors, (34), 4 states have call predecessors, (34), 6 states have return successors, (34), 4 states have call predecessors, (34), 3 states have call successors, (34) Word has length 217 [2022-01-10 06:46:16,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:46:16,128 INFO L225 Difference]: With dead ends: 13866 [2022-01-10 06:46:16,128 INFO L226 Difference]: Without dead ends: 7907 [2022-01-10 06:46:16,137 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 436 GetRequests, 426 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-01-10 06:46:16,137 INFO L933 BasicCegarLoop]: 497 mSDtfsCounter, 363 mSDsluCounter, 2642 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 386 SdHoareTripleChecker+Valid, 3139 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:46:16,138 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [386 Valid, 3139 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 178 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:46:16,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7907 states. [2022-01-10 06:46:16,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7907 to 6413. [2022-01-10 06:46:16,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6413 states, 4920 states have (on average 1.2841463414634147) internal successors, (6318), 4955 states have internal predecessors, (6318), 945 states have call successors, (945), 547 states have call predecessors, (945), 547 states have return successors, (945), 910 states have call predecessors, (945), 945 states have call successors, (945) [2022-01-10 06:46:16,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6413 states to 6413 states and 8208 transitions. [2022-01-10 06:46:16,753 INFO L78 Accepts]: Start accepts. Automaton has 6413 states and 8208 transitions. Word has length 217 [2022-01-10 06:46:16,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:46:16,753 INFO L470 AbstractCegarLoop]: Abstraction has 6413 states and 8208 transitions. [2022-01-10 06:46:16,754 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 23.125) internal successors, (185), 7 states have internal predecessors, (185), 3 states have call successors, (34), 4 states have call predecessors, (34), 6 states have return successors, (34), 4 states have call predecessors, (34), 3 states have call successors, (34) [2022-01-10 06:46:16,754 INFO L276 IsEmpty]: Start isEmpty. Operand 6413 states and 8208 transitions. [2022-01-10 06:46:16,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2022-01-10 06:46:16,762 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:46:16,763 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:46:16,777 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 06:46:16,972 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 06:46:16,972 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:46:16,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:46:16,973 INFO L85 PathProgramCache]: Analyzing trace with hash 1376166347, now seen corresponding path program 1 times [2022-01-10 06:46:16,973 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:46:16,973 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1460963238] [2022-01-10 06:46:16,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:46:16,973 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:46:16,973 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:46:16,974 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 06:46:16,975 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 06:46:17,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:46:17,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 476 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-10 06:46:17,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:46:17,517 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 67 proven. 60 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-01-10 06:46:17,517 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:46:17,840 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 29 proven. 26 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2022-01-10 06:46:17,841 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:46:17,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1460963238] [2022-01-10 06:46:17,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1460963238] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:46:17,841 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:46:17,841 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2022-01-10 06:46:17,841 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120454414] [2022-01-10 06:46:17,841 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:46:17,842 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-10 06:46:17,842 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:46:17,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-10 06:46:17,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-01-10 06:46:17,842 INFO L87 Difference]: Start difference. First operand 6413 states and 8208 transitions. Second operand has 10 states, 10 states have (on average 20.1) internal successors, (201), 9 states have internal predecessors, (201), 4 states have call successors, (35), 4 states have call predecessors, (35), 6 states have return successors, (33), 5 states have call predecessors, (33), 4 states have call successors, (33) [2022-01-10 06:46:19,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:46:19,522 INFO L93 Difference]: Finished difference Result 19611 states and 25824 transitions. [2022-01-10 06:46:19,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-10 06:46:19,524 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 20.1) internal successors, (201), 9 states have internal predecessors, (201), 4 states have call successors, (35), 4 states have call predecessors, (35), 6 states have return successors, (33), 5 states have call predecessors, (33), 4 states have call successors, (33) Word has length 222 [2022-01-10 06:46:19,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:46:19,565 INFO L225 Difference]: With dead ends: 19611 [2022-01-10 06:46:19,566 INFO L226 Difference]: Without dead ends: 13708 [2022-01-10 06:46:19,577 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 463 GetRequests, 441 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=140, Invalid=412, Unknown=0, NotChecked=0, Total=552 [2022-01-10 06:46:19,578 INFO L933 BasicCegarLoop]: 758 mSDtfsCounter, 1227 mSDsluCounter, 2980 mSDsCounter, 0 mSdLazyCounter, 652 mSolverCounterSat, 406 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1232 SdHoareTripleChecker+Valid, 3738 SdHoareTripleChecker+Invalid, 1058 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 406 IncrementalHoareTripleChecker+Valid, 652 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-10 06:46:19,578 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1232 Valid, 3738 Invalid, 1058 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [406 Valid, 652 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-10 06:46:19,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13708 states. [2022-01-10 06:46:20,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13708 to 10323. [2022-01-10 06:46:20,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10323 states, 7754 states have (on average 1.28669074026309) internal successors, (9977), 7817 states have internal predecessors, (9977), 1661 states have call successors, (1661), 907 states have call predecessors, (1661), 907 states have return successors, (1661), 1598 states have call predecessors, (1661), 1661 states have call successors, (1661) [2022-01-10 06:46:20,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10323 states to 10323 states and 13299 transitions. [2022-01-10 06:46:20,469 INFO L78 Accepts]: Start accepts. Automaton has 10323 states and 13299 transitions. Word has length 222 [2022-01-10 06:46:20,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:46:20,469 INFO L470 AbstractCegarLoop]: Abstraction has 10323 states and 13299 transitions. [2022-01-10 06:46:20,470 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 20.1) internal successors, (201), 9 states have internal predecessors, (201), 4 states have call successors, (35), 4 states have call predecessors, (35), 6 states have return successors, (33), 5 states have call predecessors, (33), 4 states have call successors, (33) [2022-01-10 06:46:20,470 INFO L276 IsEmpty]: Start isEmpty. Operand 10323 states and 13299 transitions. [2022-01-10 06:46:20,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2022-01-10 06:46:20,480 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:46:20,480 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 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] [2022-01-10 06:46:20,493 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 06:46:20,689 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 06:46:20,690 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:46:20,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:46:20,690 INFO L85 PathProgramCache]: Analyzing trace with hash -1192841241, now seen corresponding path program 1 times [2022-01-10 06:46:20,690 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:46:20,691 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1928846262] [2022-01-10 06:46:20,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:46:20,691 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:46:20,691 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:46:20,692 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 06:46:20,692 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 06:46:20,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:46:20,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 483 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-10 06:46:20,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:46:21,415 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 96 proven. 18 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-01-10 06:46:21,415 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:46:21,810 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 34 proven. 10 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2022-01-10 06:46:21,810 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:46:21,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1928846262] [2022-01-10 06:46:21,810 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1928846262] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:46:21,811 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:46:21,811 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 18 [2022-01-10 06:46:21,811 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604593161] [2022-01-10 06:46:21,811 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:46:21,811 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-10 06:46:21,812 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:46:21,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-10 06:46:21,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2022-01-10 06:46:21,812 INFO L87 Difference]: Start difference. First operand 10323 states and 13299 transitions. Second operand has 18 states, 18 states have (on average 15.277777777777779) internal successors, (275), 18 states have internal predecessors, (275), 7 states have call successors, (39), 5 states have call predecessors, (39), 5 states have return successors, (38), 7 states have call predecessors, (38), 7 states have call successors, (38) [2022-01-10 06:46:25,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:46:25,944 INFO L93 Difference]: Finished difference Result 25084 states and 33120 transitions. [2022-01-10 06:46:25,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-01-10 06:46:25,945 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 15.277777777777779) internal successors, (275), 18 states have internal predecessors, (275), 7 states have call successors, (39), 5 states have call predecessors, (39), 5 states have return successors, (38), 7 states have call predecessors, (38), 7 states have call successors, (38) Word has length 224 [2022-01-10 06:46:25,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:46:25,984 INFO L225 Difference]: With dead ends: 25084 [2022-01-10 06:46:25,984 INFO L226 Difference]: Without dead ends: 15271 [2022-01-10 06:46:26,001 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 500 GetRequests, 436 SyntacticMatches, 2 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 913 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=850, Invalid=3182, Unknown=0, NotChecked=0, Total=4032 [2022-01-10 06:46:26,002 INFO L933 BasicCegarLoop]: 769 mSDtfsCounter, 2617 mSDsluCounter, 4730 mSDsCounter, 0 mSdLazyCounter, 3617 mSolverCounterSat, 1474 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2617 SdHoareTripleChecker+Valid, 5499 SdHoareTripleChecker+Invalid, 5091 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1474 IncrementalHoareTripleChecker+Valid, 3617 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-01-10 06:46:26,002 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2617 Valid, 5499 Invalid, 5091 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1474 Valid, 3617 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-01-10 06:46:26,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15271 states. [2022-01-10 06:46:26,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15271 to 11918. [2022-01-10 06:46:26,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11918 states, 8968 states have (on average 1.2845673505798394) internal successors, (11520), 9040 states have internal predecessors, (11520), 1911 states have call successors, (1911), 1038 states have call predecessors, (1911), 1038 states have return successors, (1911), 1839 states have call predecessors, (1911), 1911 states have call successors, (1911) [2022-01-10 06:46:26,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11918 states to 11918 states and 15342 transitions. [2022-01-10 06:46:26,973 INFO L78 Accepts]: Start accepts. Automaton has 11918 states and 15342 transitions. Word has length 224 [2022-01-10 06:46:26,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:46:26,973 INFO L470 AbstractCegarLoop]: Abstraction has 11918 states and 15342 transitions. [2022-01-10 06:46:26,973 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 15.277777777777779) internal successors, (275), 18 states have internal predecessors, (275), 7 states have call successors, (39), 5 states have call predecessors, (39), 5 states have return successors, (38), 7 states have call predecessors, (38), 7 states have call successors, (38) [2022-01-10 06:46:26,973 INFO L276 IsEmpty]: Start isEmpty. Operand 11918 states and 15342 transitions. [2022-01-10 06:46:26,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2022-01-10 06:46:26,982 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:46:26,983 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:46:26,989 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (38)] Ended with exit code 0 [2022-01-10 06:46:27,183 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 06:46:27,183 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:46:27,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:46:27,184 INFO L85 PathProgramCache]: Analyzing trace with hash 1176450, now seen corresponding path program 1 times [2022-01-10 06:46:27,184 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:46:27,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1016382056] [2022-01-10 06:46:27,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:46:27,184 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:46:27,184 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:46:27,185 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 06:46:27,186 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 06:46:27,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:46:27,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 480 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 06:46:27,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:46:27,645 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 84 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-01-10 06:46:27,646 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:46:27,646 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:46:27,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1016382056] [2022-01-10 06:46:27,646 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1016382056] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:46:27,646 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:46:27,646 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-10 06:46:27,646 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880944429] [2022-01-10 06:46:27,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:46:27,646 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-10 06:46:27,647 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:46:27,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-10 06:46:27,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-01-10 06:46:27,647 INFO L87 Difference]: Start difference. First operand 11918 states and 15342 transitions. Second operand has 7 states, 7 states have (on average 22.857142857142858) internal successors, (160), 6 states have internal predecessors, (160), 3 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (18), 3 states have call predecessors, (18), 2 states have call successors, (18) [2022-01-10 06:46:29,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:46:29,259 INFO L93 Difference]: Finished difference Result 27447 states and 36444 transitions. [2022-01-10 06:46:29,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-10 06:46:29,259 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 22.857142857142858) internal successors, (160), 6 states have internal predecessors, (160), 3 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (18), 3 states have call predecessors, (18), 2 states have call successors, (18) Word has length 224 [2022-01-10 06:46:29,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:46:29,295 INFO L225 Difference]: With dead ends: 27447 [2022-01-10 06:46:29,295 INFO L226 Difference]: Without dead ends: 16130 [2022-01-10 06:46:29,310 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 222 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-01-10 06:46:29,310 INFO L933 BasicCegarLoop]: 583 mSDtfsCounter, 727 mSDsluCounter, 1684 mSDsCounter, 0 mSdLazyCounter, 291 mSolverCounterSat, 181 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 727 SdHoareTripleChecker+Valid, 2267 SdHoareTripleChecker+Invalid, 472 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 181 IncrementalHoareTripleChecker+Valid, 291 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 06:46:29,310 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [727 Valid, 2267 Invalid, 472 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [181 Valid, 291 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 06:46:29,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16130 states. [2022-01-10 06:46:30,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16130 to 11902. [2022-01-10 06:46:30,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11902 states, 8952 states have (on average 1.2815013404825737) internal successors, (11472), 9024 states have internal predecessors, (11472), 1911 states have call successors, (1911), 1038 states have call predecessors, (1911), 1038 states have return successors, (1911), 1839 states have call predecessors, (1911), 1911 states have call successors, (1911) [2022-01-10 06:46:30,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11902 states to 11902 states and 15294 transitions. [2022-01-10 06:46:30,375 INFO L78 Accepts]: Start accepts. Automaton has 11902 states and 15294 transitions. Word has length 224 [2022-01-10 06:46:30,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:46:30,376 INFO L470 AbstractCegarLoop]: Abstraction has 11902 states and 15294 transitions. [2022-01-10 06:46:30,376 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.857142857142858) internal successors, (160), 6 states have internal predecessors, (160), 3 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (18), 3 states have call predecessors, (18), 2 states have call successors, (18) [2022-01-10 06:46:30,376 INFO L276 IsEmpty]: Start isEmpty. Operand 11902 states and 15294 transitions. [2022-01-10 06:46:30,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2022-01-10 06:46:30,387 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:46:30,387 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:46:30,394 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 06:46:30,588 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 06:46:30,588 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:46:30,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:46:30,589 INFO L85 PathProgramCache]: Analyzing trace with hash -690576058, now seen corresponding path program 1 times [2022-01-10 06:46:30,589 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:46:30,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [480851108] [2022-01-10 06:46:30,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:46:30,589 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:46:30,589 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:46:30,590 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 06:46:30,591 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 06:46:30,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:46:30,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 497 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 06:46:30,723 INFO L286 TraceCheckSpWp]: Computing forward predicates...