/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/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf -i ../../../trunk/examples/svcomp/loops/n.c24.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-34549b5 [2022-04-06 09:11:24,008 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-06 09:11:24,048 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-06 09:11:24,084 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-04-06 09:11:24,085 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-04-06 09:11:24,086 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-04-06 09:11:24,088 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-04-06 09:11:24,090 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-04-06 09:11:24,091 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-04-06 09:11:24,094 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-04-06 09:11:24,095 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-04-06 09:11:24,096 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-04-06 09:11:24,096 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-04-06 09:11:24,098 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-04-06 09:11:24,099 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-04-06 09:11:24,101 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-04-06 09:11:24,101 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-04-06 09:11:24,102 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-04-06 09:11:24,103 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-04-06 09:11:24,107 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-04-06 09:11:24,108 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-04-06 09:11:24,109 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-04-06 09:11:24,110 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-04-06 09:11:24,110 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-04-06 09:11:24,111 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-04-06 09:11:24,114 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-04-06 09:11:24,114 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-04-06 09:11:24,115 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-04-06 09:11:24,115 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-04-06 09:11:24,115 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-04-06 09:11:24,116 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-04-06 09:11:24,116 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-04-06 09:11:24,118 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-04-06 09:11:24,118 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-04-06 09:11:24,118 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-04-06 09:11:24,119 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-04-06 09:11:24,119 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-04-06 09:11:24,119 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-04-06 09:11:24,119 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-04-06 09:11:24,120 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-06 09:11:24,120 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-06 09:11:24,121 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-06 09:11:24,122 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf [2022-04-06 09:11:24,141 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-06 09:11:24,142 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-06 09:11:24,142 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-04-06 09:11:24,142 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-04-06 09:11:24,143 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-04-06 09:11:24,143 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-04-06 09:11:24,143 INFO L138 SettingsManager]: * Use SBE=true [2022-04-06 09:11:24,144 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-06 09:11:24,144 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-06 09:11:24,144 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-06 09:11:24,144 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-06 09:11:24,144 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-06 09:11:24,144 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-06 09:11:24,145 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-06 09:11:24,145 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-06 09:11:24,145 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-06 09:11:24,145 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-06 09:11:24,145 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-06 09:11:24,145 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-06 09:11:24,145 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 09:11:24,145 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-06 09:11:24,145 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-04-06 09:11:24,146 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-04-06 09:11:24,146 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-04-06 09:11:24,146 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-04-06 09:11:24,146 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-06 09:11:24,146 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-04-06 09:11:24,146 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-04-06 09:11:24,147 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-04-06 09:11:24,147 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_QVASR 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-06 09:11:24,346 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-06 09:11:24,373 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-06 09:11:24,375 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-06 09:11:24,376 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-06 09:11:24,377 INFO L275 PluginConnector]: CDTParser initialized [2022-04-06 09:11:24,378 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/n.c24.i [2022-04-06 09:11:24,433 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0fe1f84ef/96b4343da9f9401795ba0f0b788cc432/FLAGa09698053 [2022-04-06 09:11:24,813 INFO L306 CDTParser]: Found 1 translation units. [2022-04-06 09:11:24,814 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/n.c24.i [2022-04-06 09:11:24,822 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0fe1f84ef/96b4343da9f9401795ba0f0b788cc432/FLAGa09698053 [2022-04-06 09:11:24,833 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0fe1f84ef/96b4343da9f9401795ba0f0b788cc432 [2022-04-06 09:11:24,834 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-06 09:11:24,835 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-04-06 09:11:24,853 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-06 09:11:24,853 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-06 09:11:24,857 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-06 09:11:24,857 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 09:11:24" (1/1) ... [2022-04-06 09:11:24,858 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@523bf991 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:11:24, skipping insertion in model container [2022-04-06 09:11:24,858 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 09:11:24" (1/1) ... [2022-04-06 09:11:24,862 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-06 09:11:24,884 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-06 09:11:25,009 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/n.c24.i[805,818] [2022-04-06 09:11:25,062 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 09:11:25,067 INFO L203 MainTranslator]: Completed pre-run [2022-04-06 09:11:25,074 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/n.c24.i[805,818] [2022-04-06 09:11:25,094 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 09:11:25,105 INFO L208 MainTranslator]: Completed translation [2022-04-06 09:11:25,105 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:11:25 WrapperNode [2022-04-06 09:11:25,105 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-06 09:11:25,110 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-06 09:11:25,111 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-06 09:11:25,111 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-06 09:11:25,117 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:11:25" (1/1) ... [2022-04-06 09:11:25,117 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:11:25" (1/1) ... [2022-04-06 09:11:25,123 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:11:25" (1/1) ... [2022-04-06 09:11:25,123 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:11:25" (1/1) ... [2022-04-06 09:11:25,134 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:11:25" (1/1) ... [2022-04-06 09:11:25,137 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:11:25" (1/1) ... [2022-04-06 09:11:25,147 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:11:25" (1/1) ... [2022-04-06 09:11:25,150 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-06 09:11:25,150 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-06 09:11:25,150 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-06 09:11:25,150 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-06 09:11:25,152 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:11:25" (1/1) ... [2022-04-06 09:11:25,162 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 09:11:25,168 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 09:11:25,190 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) [2022-04-06 09:11:25,214 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 [2022-04-06 09:11:25,225 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-06 09:11:25,225 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-06 09:11:25,225 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-06 09:11:25,225 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-06 09:11:25,225 INFO L138 BoogieDeclarations]: Found implementation of procedure bar [2022-04-06 09:11:25,226 INFO L138 BoogieDeclarations]: Found implementation of procedure foo [2022-04-06 09:11:25,226 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-06 09:11:25,226 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memmove [2022-04-06 09:11:25,228 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-06 09:11:25,228 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-06 09:11:25,228 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-04-06 09:11:25,228 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-04-06 09:11:25,228 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-06 09:11:25,228 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-06 09:11:25,228 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-06 09:11:25,228 INFO L130 BoogieDeclarations]: Found specification of procedure memcpy [2022-04-06 09:11:25,228 INFO L130 BoogieDeclarations]: Found specification of procedure memmove [2022-04-06 09:11:25,228 INFO L130 BoogieDeclarations]: Found specification of procedure memccpy [2022-04-06 09:11:25,228 INFO L130 BoogieDeclarations]: Found specification of procedure memset [2022-04-06 09:11:25,229 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2022-04-06 09:11:25,229 INFO L130 BoogieDeclarations]: Found specification of procedure memchr [2022-04-06 09:11:25,229 INFO L130 BoogieDeclarations]: Found specification of procedure strcpy [2022-04-06 09:11:25,229 INFO L130 BoogieDeclarations]: Found specification of procedure strncpy [2022-04-06 09:11:25,229 INFO L130 BoogieDeclarations]: Found specification of procedure strcat [2022-04-06 09:11:25,229 INFO L130 BoogieDeclarations]: Found specification of procedure strncat [2022-04-06 09:11:25,229 INFO L130 BoogieDeclarations]: Found specification of procedure strcmp [2022-04-06 09:11:25,229 INFO L130 BoogieDeclarations]: Found specification of procedure strncmp [2022-04-06 09:11:25,229 INFO L130 BoogieDeclarations]: Found specification of procedure strcoll [2022-04-06 09:11:25,229 INFO L130 BoogieDeclarations]: Found specification of procedure strxfrm [2022-04-06 09:11:25,229 INFO L130 BoogieDeclarations]: Found specification of procedure strcoll_l [2022-04-06 09:11:25,229 INFO L130 BoogieDeclarations]: Found specification of procedure strxfrm_l [2022-04-06 09:11:25,229 INFO L130 BoogieDeclarations]: Found specification of procedure strdup [2022-04-06 09:11:25,230 INFO L130 BoogieDeclarations]: Found specification of procedure strndup [2022-04-06 09:11:25,230 INFO L130 BoogieDeclarations]: Found specification of procedure strchr [2022-04-06 09:11:25,230 INFO L130 BoogieDeclarations]: Found specification of procedure strrchr [2022-04-06 09:11:25,230 INFO L130 BoogieDeclarations]: Found specification of procedure strcspn [2022-04-06 09:11:25,230 INFO L130 BoogieDeclarations]: Found specification of procedure strspn [2022-04-06 09:11:25,230 INFO L130 BoogieDeclarations]: Found specification of procedure strpbrk [2022-04-06 09:11:25,230 INFO L130 BoogieDeclarations]: Found specification of procedure strstr [2022-04-06 09:11:25,230 INFO L130 BoogieDeclarations]: Found specification of procedure strtok [2022-04-06 09:11:25,230 INFO L130 BoogieDeclarations]: Found specification of procedure __strtok_r [2022-04-06 09:11:25,230 INFO L130 BoogieDeclarations]: Found specification of procedure strtok_r [2022-04-06 09:11:25,230 INFO L130 BoogieDeclarations]: Found specification of procedure strlen [2022-04-06 09:11:25,230 INFO L130 BoogieDeclarations]: Found specification of procedure strnlen [2022-04-06 09:11:25,231 INFO L130 BoogieDeclarations]: Found specification of procedure strerror [2022-04-06 09:11:25,231 INFO L130 BoogieDeclarations]: Found specification of procedure strerror_r [2022-04-06 09:11:25,231 INFO L130 BoogieDeclarations]: Found specification of procedure strerror_l [2022-04-06 09:11:25,231 INFO L130 BoogieDeclarations]: Found specification of procedure __bzero [2022-04-06 09:11:25,231 INFO L130 BoogieDeclarations]: Found specification of procedure bcopy [2022-04-06 09:11:25,231 INFO L130 BoogieDeclarations]: Found specification of procedure bzero [2022-04-06 09:11:25,231 INFO L130 BoogieDeclarations]: Found specification of procedure bcmp [2022-04-06 09:11:25,231 INFO L130 BoogieDeclarations]: Found specification of procedure index [2022-04-06 09:11:25,231 INFO L130 BoogieDeclarations]: Found specification of procedure rindex [2022-04-06 09:11:25,231 INFO L130 BoogieDeclarations]: Found specification of procedure ffs [2022-04-06 09:11:25,231 INFO L130 BoogieDeclarations]: Found specification of procedure strcasecmp [2022-04-06 09:11:25,231 INFO L130 BoogieDeclarations]: Found specification of procedure strncasecmp [2022-04-06 09:11:25,231 INFO L130 BoogieDeclarations]: Found specification of procedure strsep [2022-04-06 09:11:25,232 INFO L130 BoogieDeclarations]: Found specification of procedure strsignal [2022-04-06 09:11:25,232 INFO L130 BoogieDeclarations]: Found specification of procedure __stpcpy [2022-04-06 09:11:25,232 INFO L130 BoogieDeclarations]: Found specification of procedure stpcpy [2022-04-06 09:11:25,233 INFO L130 BoogieDeclarations]: Found specification of procedure __stpncpy [2022-04-06 09:11:25,233 INFO L130 BoogieDeclarations]: Found specification of procedure stpncpy [2022-04-06 09:11:25,233 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-04-06 09:11:25,233 INFO L130 BoogieDeclarations]: Found specification of procedure bar [2022-04-06 09:11:25,233 INFO L130 BoogieDeclarations]: Found specification of procedure foo [2022-04-06 09:11:25,233 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-06 09:11:25,234 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-06 09:11:25,234 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-06 09:11:25,234 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-04-06 09:11:25,234 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memmove [2022-04-06 09:11:25,234 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-06 09:11:25,234 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-06 09:11:25,234 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-06 09:11:25,234 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-06 09:11:25,234 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2022-04-06 09:11:25,234 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2022-04-06 09:11:25,387 INFO L234 CfgBuilder]: Building ICFG [2022-04-06 09:11:25,388 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-06 09:11:25,565 INFO L275 CfgBuilder]: Performing block encoding [2022-04-06 09:11:25,569 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-06 09:11:25,569 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2022-04-06 09:11:25,571 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 09:11:25 BoogieIcfgContainer [2022-04-06 09:11:25,571 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-06 09:11:25,571 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-04-06 09:11:25,571 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-04-06 09:11:25,575 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-04-06 09:11:25,578 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 09:11:25" (1/1) ... [2022-04-06 09:11:25,579 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_QVASR [2022-04-06 09:11:25,597 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.04 09:11:25 BasicIcfg [2022-04-06 09:11:25,597 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-04-06 09:11:25,598 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-06 09:11:25,599 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-06 09:11:25,600 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-06 09:11:25,600 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.04 09:11:24" (1/4) ... [2022-04-06 09:11:25,601 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@171246d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 09:11:25, skipping insertion in model container [2022-04-06 09:11:25,601 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:11:25" (2/4) ... [2022-04-06 09:11:25,601 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@171246d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 09:11:25, skipping insertion in model container [2022-04-06 09:11:25,601 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 09:11:25" (3/4) ... [2022-04-06 09:11:25,601 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@171246d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.04 09:11:25, skipping insertion in model container [2022-04-06 09:11:25,601 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.04 09:11:25" (4/4) ... [2022-04-06 09:11:25,602 INFO L111 eAbstractionObserver]: Analyzing ICFG n.c24.iqvasr [2022-04-06 09:11:25,605 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-04-06 09:11:25,605 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-06 09:11:25,631 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-06 09:11:25,635 INFO L340 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=FINITE_AUTOMATA, 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 [2022-04-06 09:11:25,636 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-06 09:11:25,652 INFO L276 IsEmpty]: Start isEmpty. Operand has 53 states, 39 states have (on average 1.5128205128205128) internal successors, (59), 40 states have internal predecessors, (59), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-04-06 09:11:25,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-04-06 09:11:25,655 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:11:25,655 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:11:25,656 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:11:25,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:11:25,659 INFO L85 PathProgramCache]: Analyzing trace with hash 375090633, now seen corresponding path program 1 times [2022-04-06 09:11:25,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:11:25,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146765203] [2022-04-06 09:11:25,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:11:25,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:11:25,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:11:25,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:11:25,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:11:25,787 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 09:11:25,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:11:25,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146765203] [2022-04-06 09:11:25,788 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146765203] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 09:11:25,788 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 09:11:25,789 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 09:11:25,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924943620] [2022-04-06 09:11:25,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 09:11:25,793 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-06 09:11:25,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:11:25,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-06 09:11:25,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 09:11:25,815 INFO L87 Difference]: Start difference. First operand has 53 states, 39 states have (on average 1.5128205128205128) internal successors, (59), 40 states have internal predecessors, (59), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 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) [2022-04-06 09:11:25,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:11:25,867 INFO L93 Difference]: Finished difference Result 98 states and 133 transitions. [2022-04-06 09:11:25,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-06 09:11:25,869 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 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 13 [2022-04-06 09:11:25,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:11:25,873 INFO L225 Difference]: With dead ends: 98 [2022-04-06 09:11:25,873 INFO L226 Difference]: Without dead ends: 46 [2022-04-06 09:11:25,875 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 09:11:25,877 INFO L913 BasicCegarLoop]: 62 mSDtfsCounter, 51 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 09:11:25,878 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 65 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 09:11:25,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-04-06 09:11:25,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2022-04-06 09:11:25,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 35 states have (on average 1.3142857142857143) internal successors, (46), 35 states have internal predecessors, (46), 6 states have call successors, (6), 6 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-06 09:11:25,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 56 transitions. [2022-04-06 09:11:25,924 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 56 transitions. Word has length 13 [2022-04-06 09:11:25,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:11:25,924 INFO L478 AbstractCegarLoop]: Abstraction has 46 states and 56 transitions. [2022-04-06 09:11:25,925 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 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) [2022-04-06 09:11:25,925 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 56 transitions. [2022-04-06 09:11:25,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-04-06 09:11:25,925 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:11:25,926 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:11:25,926 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-06 09:11:25,926 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:11:25,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:11:25,929 INFO L85 PathProgramCache]: Analyzing trace with hash 376014154, now seen corresponding path program 1 times [2022-04-06 09:11:25,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:11:25,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014855786] [2022-04-06 09:11:25,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:11:25,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:11:25,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:11:25,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:11:25,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:11:26,005 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 09:11:26,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:11:26,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014855786] [2022-04-06 09:11:26,005 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014855786] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 09:11:26,006 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 09:11:26,006 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 09:11:26,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244374317] [2022-04-06 09:11:26,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 09:11:26,008 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 09:11:26,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:11:26,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 09:11:26,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 09:11:26,011 INFO L87 Difference]: Start difference. First operand 46 states and 56 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 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) [2022-04-06 09:11:26,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:11:26,171 INFO L93 Difference]: Finished difference Result 107 states and 138 transitions. [2022-04-06 09:11:26,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 09:11:26,172 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 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 13 [2022-04-06 09:11:26,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:11:26,174 INFO L225 Difference]: With dead ends: 107 [2022-04-06 09:11:26,174 INFO L226 Difference]: Without dead ends: 69 [2022-04-06 09:11:26,191 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-04-06 09:11:26,193 INFO L913 BasicCegarLoop]: 46 mSDtfsCounter, 94 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 09:11:26,194 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 53 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 09:11:26,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-04-06 09:11:26,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 48. [2022-04-06 09:11:26,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 37 states have (on average 1.2972972972972974) internal successors, (48), 37 states have internal predecessors, (48), 6 states have call successors, (6), 6 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-06 09:11:26,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 58 transitions. [2022-04-06 09:11:26,213 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 58 transitions. Word has length 13 [2022-04-06 09:11:26,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:11:26,213 INFO L478 AbstractCegarLoop]: Abstraction has 48 states and 58 transitions. [2022-04-06 09:11:26,213 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 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) [2022-04-06 09:11:26,214 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 58 transitions. [2022-04-06 09:11:26,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-04-06 09:11:26,215 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:11:26,215 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:11:26,215 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-04-06 09:11:26,215 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:11:26,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:11:26,216 INFO L85 PathProgramCache]: Analyzing trace with hash -1312963868, now seen corresponding path program 1 times [2022-04-06 09:11:26,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:11:26,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562057363] [2022-04-06 09:11:26,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:11:26,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:11:26,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:11:26,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:11:26,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:11:26,336 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 09:11:26,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:11:26,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562057363] [2022-04-06 09:11:26,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562057363] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 09:11:26,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940721220] [2022-04-06 09:11:26,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:11:26,337 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:11:26,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 09:11:26,344 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 09:11:26,345 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-04-06 09:11:26,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:11:26,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 3 conjunts are in the unsatisfiable core [2022-04-06 09:11:26,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 09:11:26,501 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 09:11:26,501 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 09:11:26,555 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 09:11:26,555 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1940721220] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 09:11:26,555 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 09:11:26,555 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-04-06 09:11:26,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321527432] [2022-04-06 09:11:26,556 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 09:11:26,556 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 09:11:26,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:11:26,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 09:11:26,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-04-06 09:11:26,557 INFO L87 Difference]: Start difference. First operand 48 states and 58 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 09:11:26,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:11:26,743 INFO L93 Difference]: Finished difference Result 156 states and 211 transitions. [2022-04-06 09:11:26,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-06 09:11:26,744 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2022-04-06 09:11:26,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:11:26,745 INFO L225 Difference]: With dead ends: 156 [2022-04-06 09:11:26,745 INFO L226 Difference]: Without dead ends: 117 [2022-04-06 09:11:26,745 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2022-04-06 09:11:26,746 INFO L913 BasicCegarLoop]: 46 mSDtfsCounter, 277 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 277 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 09:11:26,746 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [277 Valid, 53 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 178 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 09:11:26,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2022-04-06 09:11:26,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2022-04-06 09:11:26,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 97 states have (on average 1.3298969072164948) internal successors, (129), 97 states have internal predecessors, (129), 15 states have call successors, (15), 6 states have call predecessors, (15), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-04-06 09:11:26,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 157 transitions. [2022-04-06 09:11:26,756 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 157 transitions. Word has length 20 [2022-04-06 09:11:26,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:11:26,756 INFO L478 AbstractCegarLoop]: Abstraction has 117 states and 157 transitions. [2022-04-06 09:11:26,757 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 09:11:26,757 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 157 transitions. [2022-04-06 09:11:26,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-04-06 09:11:26,758 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:11:26,758 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:11:26,787 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-04-06 09:11:26,988 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:11:26,989 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:11:26,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:11:26,989 INFO L85 PathProgramCache]: Analyzing trace with hash 1600944834, now seen corresponding path program 2 times [2022-04-06 09:11:26,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:11:26,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237796138] [2022-04-06 09:11:26,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:11:26,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:11:27,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:11:27,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:11:27,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:11:27,082 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-04-06 09:11:27,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:11:27,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237796138] [2022-04-06 09:11:27,082 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1237796138] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 09:11:27,083 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 09:11:27,083 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 09:11:27,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260950679] [2022-04-06 09:11:27,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 09:11:27,083 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 09:11:27,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:11:27,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 09:11:27,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-04-06 09:11:27,084 INFO L87 Difference]: Start difference. First operand 117 states and 157 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 4 states have internal predecessors, (19), 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) [2022-04-06 09:11:27,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:11:27,224 INFO L93 Difference]: Finished difference Result 204 states and 284 transitions. [2022-04-06 09:11:27,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 09:11:27,225 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 4 states have internal predecessors, (19), 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 41 [2022-04-06 09:11:27,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:11:27,226 INFO L225 Difference]: With dead ends: 204 [2022-04-06 09:11:27,226 INFO L226 Difference]: Without dead ends: 199 [2022-04-06 09:11:27,227 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-04-06 09:11:27,227 INFO L913 BasicCegarLoop]: 52 mSDtfsCounter, 89 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 09:11:27,228 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 69 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 175 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 09:11:27,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2022-04-06 09:11:27,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 118. [2022-04-06 09:11:27,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 98 states have (on average 1.336734693877551) internal successors, (131), 98 states have internal predecessors, (131), 15 states have call successors, (15), 6 states have call predecessors, (15), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-04-06 09:11:27,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 159 transitions. [2022-04-06 09:11:27,251 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 159 transitions. Word has length 41 [2022-04-06 09:11:27,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:11:27,251 INFO L478 AbstractCegarLoop]: Abstraction has 118 states and 159 transitions. [2022-04-06 09:11:27,251 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 4 states have internal predecessors, (19), 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) [2022-04-06 09:11:27,251 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 159 transitions. [2022-04-06 09:11:27,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-04-06 09:11:27,253 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:11:27,253 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:11:27,253 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-04-06 09:11:27,253 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:11:27,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:11:27,253 INFO L85 PathProgramCache]: Analyzing trace with hash -1931579242, now seen corresponding path program 1 times [2022-04-06 09:11:27,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:11:27,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457446399] [2022-04-06 09:11:27,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:11:27,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:11:27,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:11:27,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:11:27,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:11:27,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-04-06 09:11:27,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:11:27,363 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-04-06 09:11:27,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:11:27,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457446399] [2022-04-06 09:11:27,364 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457446399] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 09:11:27,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1566793580] [2022-04-06 09:11:27,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:11:27,364 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:11:27,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 09:11:27,365 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 09:11:27,373 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-04-06 09:11:27,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:11:27,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 6 conjunts are in the unsatisfiable core [2022-04-06 09:11:27,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 09:11:27,535 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-04-06 09:11:27,536 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 09:11:27,647 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-04-06 09:11:27,647 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1566793580] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 09:11:27,647 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 09:11:27,647 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 15 [2022-04-06 09:11:27,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069103108] [2022-04-06 09:11:27,647 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 09:11:27,648 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-04-06 09:11:27,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:11:27,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-04-06 09:11:27,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2022-04-06 09:11:27,648 INFO L87 Difference]: Start difference. First operand 118 states and 159 transitions. Second operand has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 13 states have internal predecessors, (46), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 09:11:28,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:11:28,159 INFO L93 Difference]: Finished difference Result 383 states and 553 transitions. [2022-04-06 09:11:28,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-04-06 09:11:28,159 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 13 states have internal predecessors, (46), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 50 [2022-04-06 09:11:28,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:11:28,161 INFO L225 Difference]: With dead ends: 383 [2022-04-06 09:11:28,161 INFO L226 Difference]: Without dead ends: 280 [2022-04-06 09:11:28,162 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=243, Invalid=459, Unknown=0, NotChecked=0, Total=702 [2022-04-06 09:11:28,163 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 582 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 526 mSolverCounterSat, 224 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 582 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 750 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 224 IncrementalHoareTripleChecker+Valid, 526 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 09:11:28,163 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [582 Valid, 49 Invalid, 750 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [224 Valid, 526 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 09:11:28,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2022-04-06 09:11:28,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 256. [2022-04-06 09:11:28,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 218 states have (on average 1.3440366972477065) internal successors, (293), 218 states have internal predecessors, (293), 33 states have call successors, (33), 6 states have call predecessors, (33), 4 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2022-04-06 09:11:28,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 357 transitions. [2022-04-06 09:11:28,200 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 357 transitions. Word has length 50 [2022-04-06 09:11:28,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:11:28,200 INFO L478 AbstractCegarLoop]: Abstraction has 256 states and 357 transitions. [2022-04-06 09:11:28,200 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 13 states have internal predecessors, (46), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 09:11:28,200 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 357 transitions. [2022-04-06 09:11:28,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-04-06 09:11:28,203 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:11:28,203 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:11:28,231 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-04-06 09:11:28,403 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:11:28,404 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:11:28,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:11:28,404 INFO L85 PathProgramCache]: Analyzing trace with hash 554606818, now seen corresponding path program 2 times [2022-04-06 09:11:28,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:11:28,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599713110] [2022-04-06 09:11:28,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:11:28,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:11:28,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:11:28,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:11:28,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:11:28,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2022-04-06 09:11:28,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:11:28,601 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2022-04-06 09:11:28,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:11:28,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599713110] [2022-04-06 09:11:28,602 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599713110] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 09:11:28,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1865418301] [2022-04-06 09:11:28,602 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 09:11:28,602 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:11:28,602 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 09:11:28,603 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 09:11:28,605 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-04-06 09:11:28,703 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 09:11:28,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 09:11:28,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 12 conjunts are in the unsatisfiable core [2022-04-06 09:11:28,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 09:11:28,825 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2022-04-06 09:11:28,826 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 09:11:29,066 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2022-04-06 09:11:29,066 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1865418301] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 09:11:29,066 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 09:11:29,067 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 13] total 27 [2022-04-06 09:11:29,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581630548] [2022-04-06 09:11:29,067 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 09:11:29,067 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-04-06 09:11:29,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:11:29,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-04-06 09:11:29,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=304, Invalid=398, Unknown=0, NotChecked=0, Total=702 [2022-04-06 09:11:29,069 INFO L87 Difference]: Start difference. First operand 256 states and 357 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 25 states have internal predecessors, (70), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 09:11:30,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:11:30,216 INFO L93 Difference]: Finished difference Result 803 states and 1183 transitions. [2022-04-06 09:11:30,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-04-06 09:11:30,216 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 25 states have internal predecessors, (70), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 92 [2022-04-06 09:11:30,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:11:30,229 INFO L225 Difference]: With dead ends: 803 [2022-04-06 09:11:30,229 INFO L226 Difference]: Without dead ends: 574 [2022-04-06 09:11:30,231 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 411 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=909, Invalid=1641, Unknown=0, NotChecked=0, Total=2550 [2022-04-06 09:11:30,232 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 1347 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 1147 mSolverCounterSat, 625 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1347 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 1772 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 625 IncrementalHoareTripleChecker+Valid, 1147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-04-06 09:11:30,232 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1347 Valid, 49 Invalid, 1772 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [625 Valid, 1147 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-04-06 09:11:30,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 574 states. [2022-04-06 09:11:30,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 574 to 532. [2022-04-06 09:11:30,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 532 states, 458 states have (on average 1.3471615720524017) internal successors, (617), 458 states have internal predecessors, (617), 69 states have call successors, (69), 6 states have call predecessors, (69), 4 states have return successors, (67), 67 states have call predecessors, (67), 67 states have call successors, (67) [2022-04-06 09:11:30,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 532 states to 532 states and 753 transitions. [2022-04-06 09:11:30,277 INFO L78 Accepts]: Start accepts. Automaton has 532 states and 753 transitions. Word has length 92 [2022-04-06 09:11:30,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:11:30,277 INFO L478 AbstractCegarLoop]: Abstraction has 532 states and 753 transitions. [2022-04-06 09:11:30,277 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 25 states have internal predecessors, (70), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 09:11:30,277 INFO L276 IsEmpty]: Start isEmpty. Operand 532 states and 753 transitions. [2022-04-06 09:11:30,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2022-04-06 09:11:30,284 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:11:30,284 INFO L499 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:11:30,304 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-04-06 09:11:30,505 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:11:30,506 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:11:30,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:11:30,506 INFO L85 PathProgramCache]: Analyzing trace with hash 1450933626, now seen corresponding path program 3 times [2022-04-06 09:11:30,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:11:30,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308635883] [2022-04-06 09:11:30,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:11:30,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:11:30,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:11:30,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:11:30,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:11:30,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 161 [2022-04-06 09:11:30,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:11:30,852 INFO L134 CoverageAnalysis]: Checked inductivity of 1683 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 1199 trivial. 0 not checked. [2022-04-06 09:11:30,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:11:30,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308635883] [2022-04-06 09:11:30,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308635883] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 09:11:30,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1809617860] [2022-04-06 09:11:30,853 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-06 09:11:30,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:11:30,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 09:11:30,878 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 09:11:30,879 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-04-06 09:11:30,984 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-04-06 09:11:30,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 09:11:30,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 09:11:30,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 09:11:31,253 INFO L134 CoverageAnalysis]: Checked inductivity of 1683 backedges. 85 proven. 1 refuted. 0 times theorem prover too weak. 1597 trivial. 0 not checked. [2022-04-06 09:11:31,253 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 09:11:31,535 INFO L134 CoverageAnalysis]: Checked inductivity of 1683 backedges. 85 proven. 1 refuted. 0 times theorem prover too weak. 1597 trivial. 0 not checked. [2022-04-06 09:11:31,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1809617860] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 09:11:31,536 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 09:11:31,536 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 7, 7] total 35 [2022-04-06 09:11:31,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286252814] [2022-04-06 09:11:31,536 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 09:11:31,536 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-04-06 09:11:31,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:11:31,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-04-06 09:11:31,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=861, Unknown=0, NotChecked=0, Total=1190 [2022-04-06 09:11:31,538 INFO L87 Difference]: Start difference. First operand 532 states and 753 transitions. Second operand has 35 states, 35 states have (on average 2.7714285714285714) internal successors, (97), 32 states have internal predecessors, (97), 6 states have call successors, (9), 5 states have call predecessors, (9), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-06 09:11:38,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:11:38,688 INFO L93 Difference]: Finished difference Result 2639 states and 3948 transitions. [2022-04-06 09:11:38,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 174 states. [2022-04-06 09:11:38,689 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.7714285714285714) internal successors, (97), 32 states have internal predecessors, (97), 6 states have call successors, (9), 5 states have call predecessors, (9), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 176 [2022-04-06 09:11:38,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:11:38,706 INFO L225 Difference]: With dead ends: 2639 [2022-04-06 09:11:38,706 INFO L226 Difference]: Without dead ends: 2153 [2022-04-06 09:11:38,716 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 647 GetRequests, 443 SyntacticMatches, 1 SemanticMatches, 203 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16044 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=10951, Invalid=30869, Unknown=0, NotChecked=0, Total=41820 [2022-04-06 09:11:38,717 INFO L913 BasicCegarLoop]: 41 mSDtfsCounter, 4714 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 4411 mSolverCounterSat, 2670 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4714 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 7081 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2670 IncrementalHoareTripleChecker+Valid, 4411 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-04-06 09:11:38,717 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [4714 Valid, 61 Invalid, 7081 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2670 Valid, 4411 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-04-06 09:11:38,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2153 states. [2022-04-06 09:11:38,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2153 to 606. [2022-04-06 09:11:38,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 606 states, 520 states have (on average 1.3596153846153847) internal successors, (707), 520 states have internal predecessors, (707), 81 states have call successors, (81), 6 states have call predecessors, (81), 4 states have return successors, (79), 79 states have call predecessors, (79), 79 states have call successors, (79) [2022-04-06 09:11:38,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 606 states to 606 states and 867 transitions. [2022-04-06 09:11:38,804 INFO L78 Accepts]: Start accepts. Automaton has 606 states and 867 transitions. Word has length 176 [2022-04-06 09:11:38,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:11:38,805 INFO L478 AbstractCegarLoop]: Abstraction has 606 states and 867 transitions. [2022-04-06 09:11:38,805 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.7714285714285714) internal successors, (97), 32 states have internal predecessors, (97), 6 states have call successors, (9), 5 states have call predecessors, (9), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-06 09:11:38,805 INFO L276 IsEmpty]: Start isEmpty. Operand 606 states and 867 transitions. [2022-04-06 09:11:38,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2022-04-06 09:11:38,811 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:11:38,811 INFO L499 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 23, 23, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:11:38,827 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-04-06 09:11:39,023 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:11:39,023 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:11:39,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:11:39,024 INFO L85 PathProgramCache]: Analyzing trace with hash 474193616, now seen corresponding path program 4 times [2022-04-06 09:11:39,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:11:39,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236188841] [2022-04-06 09:11:39,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:11:39,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:11:39,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:11:39,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:11:39,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:11:39,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 168 [2022-04-06 09:11:39,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:11:39,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 177 [2022-04-06 09:11:39,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:11:39,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 186 [2022-04-06 09:11:39,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:11:39,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 195 [2022-04-06 09:11:39,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:11:39,438 INFO L134 CoverageAnalysis]: Checked inductivity of 1963 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 1434 trivial. 0 not checked. [2022-04-06 09:11:39,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:11:39,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236188841] [2022-04-06 09:11:39,438 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236188841] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 09:11:39,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272843269] [2022-04-06 09:11:39,438 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 09:11:39,438 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:11:39,439 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 09:11:39,439 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 09:11:39,463 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-04-06 09:11:39,631 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 09:11:39,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 09:11:39,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 804 conjuncts, 25 conjunts are in the unsatisfiable core [2022-04-06 09:11:39,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 09:11:39,912 INFO L134 CoverageAnalysis]: Checked inductivity of 1963 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 1434 trivial. 0 not checked. [2022-04-06 09:11:39,912 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 09:11:40,660 INFO L134 CoverageAnalysis]: Checked inductivity of 1963 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 1434 trivial. 0 not checked. [2022-04-06 09:11:40,660 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1272843269] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 09:11:40,661 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 09:11:40,661 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 26, 26] total 53 [2022-04-06 09:11:40,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459214824] [2022-04-06 09:11:40,661 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 09:11:40,661 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-04-06 09:11:40,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:11:40,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-04-06 09:11:40,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1279, Invalid=1477, Unknown=0, NotChecked=0, Total=2756 [2022-04-06 09:11:40,663 INFO L87 Difference]: Start difference. First operand 606 states and 867 transitions. Second operand has 53 states, 53 states have (on average 2.30188679245283) internal successors, (122), 51 states have internal predecessors, (122), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 09:11:43,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:11:43,755 INFO L93 Difference]: Finished difference Result 3090 states and 4813 transitions. [2022-04-06 09:11:43,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-04-06 09:11:43,756 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.30188679245283) internal successors, (122), 51 states have internal predecessors, (122), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 210 [2022-04-06 09:11:43,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:11:43,763 INFO L225 Difference]: With dead ends: 3090 [2022-04-06 09:11:43,763 INFO L226 Difference]: Without dead ends: 2537 [2022-04-06 09:11:43,766 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 506 GetRequests, 405 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1685 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=3834, Invalid=6672, Unknown=0, NotChecked=0, Total=10506 [2022-04-06 09:11:43,766 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 2862 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2557 mSolverCounterSat, 1299 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2862 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 3856 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1299 IncrementalHoareTripleChecker+Valid, 2557 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-04-06 09:11:43,767 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2862 Valid, 51 Invalid, 3856 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1299 Valid, 2557 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-04-06 09:11:43,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2537 states. [2022-04-06 09:11:43,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2537 to 1181. [2022-04-06 09:11:43,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1181 states, 1020 states have (on average 1.3549019607843138) internal successors, (1382), 1020 states have internal predecessors, (1382), 156 states have call successors, (156), 6 states have call predecessors, (156), 4 states have return successors, (154), 154 states have call predecessors, (154), 154 states have call successors, (154) [2022-04-06 09:11:43,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1181 states to 1181 states and 1692 transitions. [2022-04-06 09:11:43,847 INFO L78 Accepts]: Start accepts. Automaton has 1181 states and 1692 transitions. Word has length 210 [2022-04-06 09:11:43,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:11:43,848 INFO L478 AbstractCegarLoop]: Abstraction has 1181 states and 1692 transitions. [2022-04-06 09:11:43,848 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.30188679245283) internal successors, (122), 51 states have internal predecessors, (122), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 09:11:43,849 INFO L276 IsEmpty]: Start isEmpty. Operand 1181 states and 1692 transitions. [2022-04-06 09:11:43,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 386 [2022-04-06 09:11:43,855 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:11:43,855 INFO L499 BasicCegarLoop]: trace histogram [48, 48, 48, 48, 48, 48, 48, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:11:43,873 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-04-06 09:11:44,071 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:11:44,072 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:11:44,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:11:44,072 INFO L85 PathProgramCache]: Analyzing trace with hash 1388474346, now seen corresponding path program 5 times [2022-04-06 09:11:44,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:11:44,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719737532] [2022-04-06 09:11:44,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:11:44,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:11:44,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:11:45,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:11:45,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:11:45,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 343 [2022-04-06 09:11:45,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:11:45,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 352 [2022-04-06 09:11:45,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:11:45,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 361 [2022-04-06 09:11:45,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:11:45,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 370 [2022-04-06 09:11:45,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:11:45,101 INFO L134 CoverageAnalysis]: Checked inductivity of 8238 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 5934 trivial. 0 not checked. [2022-04-06 09:11:45,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:11:45,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719737532] [2022-04-06 09:11:45,102 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719737532] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 09:11:45,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1253063159] [2022-04-06 09:11:45,102 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-04-06 09:11:45,102 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:11:45,102 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 09:11:45,103 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 09:11:45,146 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-04-06 09:12:37,787 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 49 check-sat command(s) [2022-04-06 09:12:37,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 09:12:37,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 1454 conjuncts, 50 conjunts are in the unsatisfiable core [2022-04-06 09:12:37,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 09:12:38,359 INFO L134 CoverageAnalysis]: Checked inductivity of 8238 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 5934 trivial. 0 not checked. [2022-04-06 09:12:38,360 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 09:12:41,046 INFO L134 CoverageAnalysis]: Checked inductivity of 8238 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 5934 trivial. 0 not checked. [2022-04-06 09:12:41,046 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1253063159] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 09:12:41,047 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 09:12:41,047 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 51, 51] total 103 [2022-04-06 09:12:41,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38386853] [2022-04-06 09:12:41,047 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 09:12:41,048 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 103 states [2022-04-06 09:12:41,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:12:41,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2022-04-06 09:12:41,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5054, Invalid=5452, Unknown=0, NotChecked=0, Total=10506 [2022-04-06 09:12:41,050 INFO L87 Difference]: Start difference. First operand 1181 states and 1692 transitions. Second operand has 103 states, 103 states have (on average 2.1553398058252426) internal successors, (222), 101 states have internal predecessors, (222), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 09:12:53,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:12:53,687 INFO L93 Difference]: Finished difference Result 6115 states and 9538 transitions. [2022-04-06 09:12:53,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2022-04-06 09:12:53,688 INFO L78 Accepts]: Start accepts. Automaton has has 103 states, 103 states have (on average 2.1553398058252426) internal successors, (222), 101 states have internal predecessors, (222), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 385 [2022-04-06 09:12:53,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:12:53,709 INFO L225 Difference]: With dead ends: 6115 [2022-04-06 09:12:53,709 INFO L226 Difference]: Without dead ends: 5037 [2022-04-06 09:12:53,717 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 931 GetRequests, 730 SyntacticMatches, 0 SemanticMatches, 201 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6510 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=15159, Invalid=25847, Unknown=0, NotChecked=0, Total=41006 [2022-04-06 09:12:53,719 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 5689 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 5660 mSolverCounterSat, 2789 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5689 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 8449 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2789 IncrementalHoareTripleChecker+Valid, 5660 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2022-04-06 09:12:53,719 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [5689 Valid, 51 Invalid, 8449 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2789 Valid, 5660 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2022-04-06 09:12:53,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5037 states. [2022-04-06 09:12:53,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5037 to 2331. [2022-04-06 09:12:53,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2331 states, 2020 states have (on average 1.3524752475247526) internal successors, (2732), 2020 states have internal predecessors, (2732), 306 states have call successors, (306), 6 states have call predecessors, (306), 4 states have return successors, (304), 304 states have call predecessors, (304), 304 states have call successors, (304) [2022-04-06 09:12:53,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2331 states to 2331 states and 3342 transitions. [2022-04-06 09:12:53,935 INFO L78 Accepts]: Start accepts. Automaton has 2331 states and 3342 transitions. Word has length 385 [2022-04-06 09:12:53,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:12:53,936 INFO L478 AbstractCegarLoop]: Abstraction has 2331 states and 3342 transitions. [2022-04-06 09:12:53,936 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 103 states, 103 states have (on average 2.1553398058252426) internal successors, (222), 101 states have internal predecessors, (222), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 09:12:53,936 INFO L276 IsEmpty]: Start isEmpty. Operand 2331 states and 3342 transitions. [2022-04-06 09:12:53,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 736 [2022-04-06 09:12:53,961 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:12:53,962 INFO L499 BasicCegarLoop]: trace histogram [98, 98, 98, 98, 98, 98, 98, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:12:54,005 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-04-06 09:12:54,187 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:12:54,187 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:12:54,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:12:54,188 INFO L85 PathProgramCache]: Analyzing trace with hash 496748614, now seen corresponding path program 6 times [2022-04-06 09:12:54,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:12:54,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269091865] [2022-04-06 09:12:54,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:12:54,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:12:54,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:12:57,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:12:57,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:12:57,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 693 [2022-04-06 09:12:57,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:12:57,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 702 [2022-04-06 09:12:57,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:12:57,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 711 [2022-04-06 09:12:57,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:12:57,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 720 [2022-04-06 09:12:57,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:12:57,845 INFO L134 CoverageAnalysis]: Checked inductivity of 33913 backedges. 0 proven. 9604 refuted. 0 times theorem prover too weak. 24309 trivial. 0 not checked. [2022-04-06 09:12:57,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:12:57,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269091865] [2022-04-06 09:12:57,845 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269091865] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 09:12:57,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7276814] [2022-04-06 09:12:57,845 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 09:12:57,845 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:12:57,846 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 09:12:57,850 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 09:12:57,851 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-04-06 09:12:58,158 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2022-04-06 09:12:58,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 09:12:58,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 466 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-06 09:12:58,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 09:12:59,347 INFO L134 CoverageAnalysis]: Checked inductivity of 33913 backedges. 680 proven. 40 refuted. 0 times theorem prover too weak. 33193 trivial. 0 not checked. [2022-04-06 09:12:59,348 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 09:13:00,442 INFO L134 CoverageAnalysis]: Checked inductivity of 33913 backedges. 680 proven. 40 refuted. 0 times theorem prover too weak. 33193 trivial. 0 not checked. [2022-04-06 09:13:00,443 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [7276814] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 09:13:00,443 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 09:13:00,443 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [103, 10, 10] total 117 [2022-04-06 09:13:00,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722137615] [2022-04-06 09:13:00,443 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 09:13:00,444 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 117 states [2022-04-06 09:13:00,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:13:00,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 117 interpolants. [2022-04-06 09:13:00,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5130, Invalid=8442, Unknown=0, NotChecked=0, Total=13572 [2022-04-06 09:13:00,446 INFO L87 Difference]: Start difference. First operand 2331 states and 3342 transitions. Second operand has 117 states, 117 states have (on average 2.3846153846153846) internal successors, (279), 114 states have internal predecessors, (279), 12 states have call successors, (15), 5 states have call predecessors, (15), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-04-06 09:20:16,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:20:16,871 INFO L93 Difference]: Finished difference Result 23041 states and 35166 transitions. [2022-04-06 09:20:16,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 1606 states. [2022-04-06 09:20:16,872 INFO L78 Accepts]: Start accepts. Automaton has has 117 states, 117 states have (on average 2.3846153846153846) internal successors, (279), 114 states have internal predecessors, (279), 12 states have call successors, (15), 5 states have call predecessors, (15), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Word has length 735 [2022-04-06 09:20:16,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:20:16,959 INFO L225 Difference]: With dead ends: 23041 [2022-04-06 09:20:16,960 INFO L226 Difference]: Without dead ends: 20905 [2022-04-06 09:20:17,222 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 3886 GetRequests, 2168 SyntacticMatches, 1 SemanticMatches, 1717 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1605796 ImplicationChecksByTransitivity, 102.9s TimeCoverageRelationStatistics Valid=715091, Invalid=2238151, Unknown=0, NotChecked=0, Total=2953242 [2022-04-06 09:20:17,222 INFO L913 BasicCegarLoop]: 41 mSDtfsCounter, 42957 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 37287 mSolverCounterSat, 35138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42957 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 72425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.3s SdHoareTripleChecker+Time, 35138 IncrementalHoareTripleChecker+Valid, 37287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 24.1s IncrementalHoareTripleChecker+Time [2022-04-06 09:20:17,223 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [42957 Valid, 69 Invalid, 72425 Unknown, 0 Unchecked, 0.3s Time], IncrementalHoareTripleChecker [35138 Valid, 37287 Invalid, 0 Unknown, 0 Unchecked, 24.1s Time] [2022-04-06 09:20:17,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20905 states. [2022-04-06 09:20:17,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20905 to 2456. [2022-04-06 09:20:17,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2456 states, 2124 states have (on average 1.3582862523540489) internal successors, (2885), 2124 states have internal predecessors, (2885), 327 states have call successors, (327), 6 states have call predecessors, (327), 4 states have return successors, (325), 325 states have call predecessors, (325), 325 states have call successors, (325) [2022-04-06 09:20:17,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2456 states to 2456 states and 3537 transitions. [2022-04-06 09:20:17,636 INFO L78 Accepts]: Start accepts. Automaton has 2456 states and 3537 transitions. Word has length 735 [2022-04-06 09:20:17,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:20:17,636 INFO L478 AbstractCegarLoop]: Abstraction has 2456 states and 3537 transitions. [2022-04-06 09:20:17,636 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 117 states, 117 states have (on average 2.3846153846153846) internal successors, (279), 114 states have internal predecessors, (279), 12 states have call successors, (15), 5 states have call predecessors, (15), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-04-06 09:20:17,636 INFO L276 IsEmpty]: Start isEmpty. Operand 2456 states and 3537 transitions. [2022-04-06 09:20:17,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 797 [2022-04-06 09:20:17,646 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:20:17,646 INFO L499 BasicCegarLoop]: trace histogram [99, 99, 99, 99, 99, 99, 99, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:20:17,683 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-04-06 09:20:17,859 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:20:17,860 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:20:17,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:20:17,860 INFO L85 PathProgramCache]: Analyzing trace with hash -904605208, now seen corresponding path program 7 times [2022-04-06 09:20:17,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:20:17,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681988800] [2022-04-06 09:20:17,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:20:17,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:20:18,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:20:21,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:20:21,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:20:21,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 700 [2022-04-06 09:20:21,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:20:21,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 709 [2022-04-06 09:20:21,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:20:21,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 718 [2022-04-06 09:20:21,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:20:21,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 727 [2022-04-06 09:20:21,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:20:21,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 736 [2022-04-06 09:20:21,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:20:21,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 745 [2022-04-06 09:20:21,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:20:21,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 754 [2022-04-06 09:20:21,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:20:21,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 763 [2022-04-06 09:20:21,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:20:21,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 772 [2022-04-06 09:20:21,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:20:21,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 781 [2022-04-06 09:20:21,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:20:21,196 INFO L134 CoverageAnalysis]: Checked inductivity of 35550 backedges. 0 proven. 9801 refuted. 0 times theorem prover too weak. 25749 trivial. 0 not checked. [2022-04-06 09:20:21,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:20:21,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681988800] [2022-04-06 09:20:21,196 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681988800] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 09:20:21,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876141327] [2022-04-06 09:20:21,196 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-04-06 09:20:21,196 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:20:21,196 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 09:20:21,208 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 09:20:21,209 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-04-06 09:20:21,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:20:21,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 2972 conjuncts, 101 conjunts are in the unsatisfiable core [2022-04-06 09:20:21,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 09:20:22,618 INFO L134 CoverageAnalysis]: Checked inductivity of 35550 backedges. 0 proven. 9801 refuted. 0 times theorem prover too weak. 25749 trivial. 0 not checked. [2022-04-06 09:20:22,619 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 09:20:31,549 INFO L134 CoverageAnalysis]: Checked inductivity of 35550 backedges. 0 proven. 9801 refuted. 0 times theorem prover too weak. 25749 trivial. 0 not checked. [2022-04-06 09:20:31,549 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1876141327] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 09:20:31,549 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 09:20:31,550 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [104, 102, 102] total 205 [2022-04-06 09:20:31,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627719880] [2022-04-06 09:20:31,550 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 09:20:31,552 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 205 states [2022-04-06 09:20:31,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:20:31,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 205 interpolants. [2022-04-06 09:20:31,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20507, Invalid=21313, Unknown=0, NotChecked=0, Total=41820 [2022-04-06 09:20:31,563 INFO L87 Difference]: Start difference. First operand 2456 states and 3537 transitions. Second operand has 205 states, 205 states have (on average 2.078048780487805) internal successors, (426), 203 states have internal predecessors, (426), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 09:22:12,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:22:12,287 INFO L93 Difference]: Finished difference Result 22792 states and 36475 transitions. [2022-04-06 09:22:12,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 206 states. [2022-04-06 09:22:12,287 INFO L78 Accepts]: Start accepts. Automaton has has 205 states, 205 states have (on average 2.078048780487805) internal successors, (426), 203 states have internal predecessors, (426), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 796 [2022-04-06 09:22:12,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:22:12,343 INFO L225 Difference]: With dead ends: 22792 [2022-04-06 09:22:12,344 INFO L226 Difference]: Without dead ends: 20541 [2022-04-06 09:22:12,362 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1918 GetRequests, 1513 SyntacticMatches, 0 SemanticMatches, 405 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26043 ImplicationChecksByTransitivity, 18.9s TimeCoverageRelationStatistics Valid=61518, Invalid=103724, Unknown=0, NotChecked=0, Total=165242 [2022-04-06 09:22:12,363 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 12727 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 11944 mSolverCounterSat, 6532 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12727 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 18476 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 6532 IncrementalHoareTripleChecker+Valid, 11944 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.2s IncrementalHoareTripleChecker+Time [2022-04-06 09:22:12,363 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [12727 Valid, 57 Invalid, 18476 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [6532 Valid, 11944 Invalid, 0 Unknown, 0 Unchecked, 8.2s Time] [2022-04-06 09:22:12,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20541 states. [2022-04-06 09:22:13,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20541 to 4779. [2022-04-06 09:22:13,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4779 states, 4144 states have (on average 1.3542471042471043) internal successors, (5612), 4144 states have internal predecessors, (5612), 630 states have call successors, (630), 6 states have call predecessors, (630), 4 states have return successors, (628), 628 states have call predecessors, (628), 628 states have call successors, (628) [2022-04-06 09:22:13,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4779 states to 4779 states and 6870 transitions. [2022-04-06 09:22:13,088 INFO L78 Accepts]: Start accepts. Automaton has 4779 states and 6870 transitions. Word has length 796 [2022-04-06 09:22:13,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:22:13,089 INFO L478 AbstractCegarLoop]: Abstraction has 4779 states and 6870 transitions. [2022-04-06 09:22:13,089 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 205 states, 205 states have (on average 2.078048780487805) internal successors, (426), 203 states have internal predecessors, (426), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 09:22:13,089 INFO L276 IsEmpty]: Start isEmpty. Operand 4779 states and 6870 transitions. [2022-04-06 09:22:13,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1504 [2022-04-06 09:22:13,111 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:22:13,111 INFO L499 BasicCegarLoop]: trace histogram [200, 200, 200, 200, 200, 200, 200, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:22:13,131 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-04-06 09:22:13,331 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-04-06 09:22:13,332 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:22:13,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:22:13,332 INFO L85 PathProgramCache]: Analyzing trace with hash 319105338, now seen corresponding path program 8 times [2022-04-06 09:22:13,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:22:13,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131272643] [2022-04-06 09:22:13,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:22:13,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:22:13,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:22:21,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:22:21,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:22:22,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1407 [2022-04-06 09:22:22,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:22:22,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1416 [2022-04-06 09:22:22,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:22:22,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1425 [2022-04-06 09:22:22,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:22:22,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1434 [2022-04-06 09:22:22,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:22:22,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1443 [2022-04-06 09:22:22,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:22:22,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1452 [2022-04-06 09:22:22,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:22:22,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1461 [2022-04-06 09:22:22,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:22:22,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1470 [2022-04-06 09:22:22,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:22:22,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1479 [2022-04-06 09:22:22,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:22:22,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1488 [2022-04-06 09:22:22,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:22:22,074 INFO L134 CoverageAnalysis]: Checked inductivity of 142105 backedges. 0 proven. 40000 refuted. 0 times theorem prover too weak. 102105 trivial. 0 not checked. [2022-04-06 09:22:22,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:22:22,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131272643] [2022-04-06 09:22:22,074 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131272643] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 09:22:22,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60532509] [2022-04-06 09:22:22,074 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 09:22:22,074 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:22:22,074 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 09:22:22,075 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 09:22:22,076 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-04-06 09:22:22,884 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 09:22:22,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 09:22:22,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 5598 conjuncts, 202 conjunts are in the unsatisfiable core [2022-04-06 09:22:22,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 09:22:24,553 INFO L134 CoverageAnalysis]: Checked inductivity of 142105 backedges. 0 proven. 40000 refuted. 0 times theorem prover too weak. 102105 trivial. 0 not checked. [2022-04-06 09:22:24,554 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 09:22:49,959 INFO L134 CoverageAnalysis]: Checked inductivity of 142105 backedges. 0 proven. 40000 refuted. 0 times theorem prover too weak. 102105 trivial. 0 not checked. [2022-04-06 09:22:49,959 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [60532509] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 09:22:49,959 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 09:22:49,960 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [205, 203, 203] total 407 [2022-04-06 09:22:49,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358605930] [2022-04-06 09:22:49,960 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 09:22:49,975 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 407 states [2022-04-06 09:22:49,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:22:49,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 407 interpolants. [2022-04-06 09:22:50,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81814, Invalid=83428, Unknown=0, NotChecked=0, Total=165242 [2022-04-06 09:22:50,010 INFO L87 Difference]: Start difference. First operand 4779 states and 6870 transitions. Second operand has 407 states, 407 states have (on average 2.039312039312039) internal successors, (830), 405 states have internal predecessors, (830), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3)