/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-7390193 [2022-04-05 04:49:41,393 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-05 04:49:41,394 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-05 04:49:41,412 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-04-05 04:49:41,412 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-04-05 04:49:41,413 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-04-05 04:49:41,414 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-04-05 04:49:41,415 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-04-05 04:49:41,416 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-04-05 04:49:41,416 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-04-05 04:49:41,417 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-04-05 04:49:41,418 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-04-05 04:49:41,418 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-04-05 04:49:41,422 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-04-05 04:49:41,423 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-04-05 04:49:41,425 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-04-05 04:49:41,425 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-04-05 04:49:41,427 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-04-05 04:49:41,431 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-04-05 04:49:41,432 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-04-05 04:49:41,432 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-04-05 04:49:41,443 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-04-05 04:49:41,444 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-04-05 04:49:41,445 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-04-05 04:49:41,445 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-04-05 04:49:41,446 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-04-05 04:49:41,451 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-05 04:49:41,451 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-05 04:49:41,455 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-05 04:49:41,456 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf [2022-04-05 04:49:41,478 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-05 04:49:41,479 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-05 04:49:41,479 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-04-05 04:49:41,479 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-04-05 04:49:41,480 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-04-05 04:49:41,480 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-04-05 04:49:41,480 INFO L138 SettingsManager]: * Use SBE=true [2022-04-05 04:49:41,480 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-05 04:49:41,480 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-05 04:49:41,481 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-05 04:49:41,481 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-05 04:49:41,481 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-05 04:49:41,481 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-05 04:49:41,481 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-05 04:49:41,481 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-05 04:49:41,481 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-05 04:49:41,481 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-05 04:49:41,482 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-05 04:49:41,482 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-05 04:49:41,482 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-05 04:49:41,482 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-05 04:49:41,482 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-04-05 04:49:41,482 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-04-05 04:49:41,482 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-04-05 04:49:41,482 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-04-05 04:49:41,483 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-05 04:49:41,483 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-04-05 04:49:41,483 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-04-05 04:49:41,483 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-04-05 04:49:41,483 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-05 04:49:41,655 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-05 04:49:41,671 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-05 04:49:41,672 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-05 04:49:41,673 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-05 04:49:41,674 INFO L275 PluginConnector]: CDTParser initialized [2022-04-05 04:49:41,675 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/n.c24.i [2022-04-05 04:49:41,720 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fb2b6d4ab/07dc4b08f7e549fcbd35fa8b0ecb9cf9/FLAGd3f59cb3d [2022-04-05 04:49:42,078 INFO L306 CDTParser]: Found 1 translation units. [2022-04-05 04:49:42,079 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/n.c24.i [2022-04-05 04:49:42,093 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fb2b6d4ab/07dc4b08f7e549fcbd35fa8b0ecb9cf9/FLAGd3f59cb3d [2022-04-05 04:49:42,509 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fb2b6d4ab/07dc4b08f7e549fcbd35fa8b0ecb9cf9 [2022-04-05 04:49:42,512 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-05 04:49:42,514 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-04-05 04:49:42,515 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-05 04:49:42,515 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-05 04:49:42,518 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-05 04:49:42,519 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.04 04:49:42" (1/1) ... [2022-04-05 04:49:42,520 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5d6cd2be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 04:49:42, skipping insertion in model container [2022-04-05 04:49:42,520 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.04 04:49:42" (1/1) ... [2022-04-05 04:49:42,524 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-05 04:49:42,544 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-05 04:49:42,677 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] [2022-04-05 04:49:42,726 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-05 04:49:42,735 INFO L203 MainTranslator]: Completed pre-run [2022-04-05 04:49:42,743 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] [2022-04-05 04:49:42,753 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-05 04:49:42,773 INFO L208 MainTranslator]: Completed translation [2022-04-05 04:49:42,773 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 04:49:42 WrapperNode [2022-04-05 04:49:42,773 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-05 04:49:42,776 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-05 04:49:42,776 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-05 04:49:42,776 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-05 04:49:42,783 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 04:49:42" (1/1) ... [2022-04-05 04:49:42,783 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 04:49:42" (1/1) ... [2022-04-05 04:49:42,790 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 04:49:42" (1/1) ... [2022-04-05 04:49:42,790 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 04:49:42" (1/1) ... [2022-04-05 04:49:42,802 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 04:49:42" (1/1) ... [2022-04-05 04:49:42,810 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 04:49:42" (1/1) ... [2022-04-05 04:49:42,812 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 04:49:42" (1/1) ... [2022-04-05 04:49:42,820 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-05 04:49:42,821 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-05 04:49:42,821 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-05 04:49:42,821 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-05 04:49:42,824 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 04:49:42" (1/1) ... [2022-04-05 04:49:42,834 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-05 04:49:42,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 04:49:42,852 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) [2022-04-05 04:49:42,853 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 [2022-04-05 04:49:42,893 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-05 04:49:42,893 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-05 04:49:42,893 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-05 04:49:42,893 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-05 04:49:42,894 INFO L138 BoogieDeclarations]: Found implementation of procedure bar [2022-04-05 04:49:42,894 INFO L138 BoogieDeclarations]: Found implementation of procedure foo [2022-04-05 04:49:42,894 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-05 04:49:42,894 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memmove [2022-04-05 04:49:42,894 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-05 04:49:42,894 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-05 04:49:42,895 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-04-05 04:49:42,895 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-04-05 04:49:42,895 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-05 04:49:42,895 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-05 04:49:42,895 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-05 04:49:42,895 INFO L130 BoogieDeclarations]: Found specification of procedure memcpy [2022-04-05 04:49:42,895 INFO L130 BoogieDeclarations]: Found specification of procedure memmove [2022-04-05 04:49:42,895 INFO L130 BoogieDeclarations]: Found specification of procedure memccpy [2022-04-05 04:49:42,895 INFO L130 BoogieDeclarations]: Found specification of procedure memset [2022-04-05 04:49:42,895 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2022-04-05 04:49:42,895 INFO L130 BoogieDeclarations]: Found specification of procedure memchr [2022-04-05 04:49:42,896 INFO L130 BoogieDeclarations]: Found specification of procedure strcpy [2022-04-05 04:49:42,896 INFO L130 BoogieDeclarations]: Found specification of procedure strncpy [2022-04-05 04:49:42,896 INFO L130 BoogieDeclarations]: Found specification of procedure strcat [2022-04-05 04:49:42,896 INFO L130 BoogieDeclarations]: Found specification of procedure strncat [2022-04-05 04:49:42,896 INFO L130 BoogieDeclarations]: Found specification of procedure strcmp [2022-04-05 04:49:42,896 INFO L130 BoogieDeclarations]: Found specification of procedure strncmp [2022-04-05 04:49:42,896 INFO L130 BoogieDeclarations]: Found specification of procedure strcoll [2022-04-05 04:49:42,896 INFO L130 BoogieDeclarations]: Found specification of procedure strxfrm [2022-04-05 04:49:42,896 INFO L130 BoogieDeclarations]: Found specification of procedure strcoll_l [2022-04-05 04:49:42,896 INFO L130 BoogieDeclarations]: Found specification of procedure strxfrm_l [2022-04-05 04:49:42,896 INFO L130 BoogieDeclarations]: Found specification of procedure strdup [2022-04-05 04:49:42,896 INFO L130 BoogieDeclarations]: Found specification of procedure strndup [2022-04-05 04:49:42,896 INFO L130 BoogieDeclarations]: Found specification of procedure strchr [2022-04-05 04:49:42,897 INFO L130 BoogieDeclarations]: Found specification of procedure strrchr [2022-04-05 04:49:42,897 INFO L130 BoogieDeclarations]: Found specification of procedure strcspn [2022-04-05 04:49:42,897 INFO L130 BoogieDeclarations]: Found specification of procedure strspn [2022-04-05 04:49:42,897 INFO L130 BoogieDeclarations]: Found specification of procedure strpbrk [2022-04-05 04:49:42,897 INFO L130 BoogieDeclarations]: Found specification of procedure strstr [2022-04-05 04:49:42,897 INFO L130 BoogieDeclarations]: Found specification of procedure strtok [2022-04-05 04:49:42,897 INFO L130 BoogieDeclarations]: Found specification of procedure __strtok_r [2022-04-05 04:49:42,897 INFO L130 BoogieDeclarations]: Found specification of procedure strtok_r [2022-04-05 04:49:42,897 INFO L130 BoogieDeclarations]: Found specification of procedure strlen [2022-04-05 04:49:42,897 INFO L130 BoogieDeclarations]: Found specification of procedure strnlen [2022-04-05 04:49:42,897 INFO L130 BoogieDeclarations]: Found specification of procedure strerror [2022-04-05 04:49:42,897 INFO L130 BoogieDeclarations]: Found specification of procedure strerror_r [2022-04-05 04:49:42,897 INFO L130 BoogieDeclarations]: Found specification of procedure strerror_l [2022-04-05 04:49:42,897 INFO L130 BoogieDeclarations]: Found specification of procedure __bzero [2022-04-05 04:49:42,898 INFO L130 BoogieDeclarations]: Found specification of procedure bcopy [2022-04-05 04:49:42,898 INFO L130 BoogieDeclarations]: Found specification of procedure bzero [2022-04-05 04:49:42,898 INFO L130 BoogieDeclarations]: Found specification of procedure bcmp [2022-04-05 04:49:42,898 INFO L130 BoogieDeclarations]: Found specification of procedure index [2022-04-05 04:49:42,898 INFO L130 BoogieDeclarations]: Found specification of procedure rindex [2022-04-05 04:49:42,898 INFO L130 BoogieDeclarations]: Found specification of procedure ffs [2022-04-05 04:49:42,898 INFO L130 BoogieDeclarations]: Found specification of procedure strcasecmp [2022-04-05 04:49:42,898 INFO L130 BoogieDeclarations]: Found specification of procedure strncasecmp [2022-04-05 04:49:42,898 INFO L130 BoogieDeclarations]: Found specification of procedure strsep [2022-04-05 04:49:42,898 INFO L130 BoogieDeclarations]: Found specification of procedure strsignal [2022-04-05 04:49:42,898 INFO L130 BoogieDeclarations]: Found specification of procedure __stpcpy [2022-04-05 04:49:42,898 INFO L130 BoogieDeclarations]: Found specification of procedure stpcpy [2022-04-05 04:49:42,898 INFO L130 BoogieDeclarations]: Found specification of procedure __stpncpy [2022-04-05 04:49:42,899 INFO L130 BoogieDeclarations]: Found specification of procedure stpncpy [2022-04-05 04:49:42,899 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-04-05 04:49:42,899 INFO L130 BoogieDeclarations]: Found specification of procedure bar [2022-04-05 04:49:42,899 INFO L130 BoogieDeclarations]: Found specification of procedure foo [2022-04-05 04:49:42,899 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-05 04:49:42,899 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-05 04:49:42,899 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-05 04:49:42,899 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-04-05 04:49:42,899 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memmove [2022-04-05 04:49:42,899 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-05 04:49:42,899 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-05 04:49:42,899 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-05 04:49:42,899 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-05 04:49:42,900 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2022-04-05 04:49:42,900 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2022-04-05 04:49:43,049 INFO L234 CfgBuilder]: Building ICFG [2022-04-05 04:49:43,050 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-05 04:49:43,202 INFO L275 CfgBuilder]: Performing block encoding [2022-04-05 04:49:43,207 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-05 04:49:43,207 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2022-04-05 04:49:43,209 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.04 04:49:43 BoogieIcfgContainer [2022-04-05 04:49:43,209 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-05 04:49:43,209 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-04-05 04:49:43,209 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-04-05 04:49:43,210 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-04-05 04:49:43,213 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.04 04:49:43" (1/1) ... [2022-04-05 04:49:43,214 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_QVASR [2022-04-05 04:49:43,235 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 05.04 04:49:43 BasicIcfg [2022-04-05 04:49:43,235 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-04-05 04:49:43,236 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-05 04:49:43,236 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-05 04:49:43,241 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-05 04:49:43,241 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.04 04:49:42" (1/4) ... [2022-04-05 04:49:43,242 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e657a3b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.04 04:49:43, skipping insertion in model container [2022-04-05 04:49:43,242 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 04:49:42" (2/4) ... [2022-04-05 04:49:43,242 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e657a3b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.04 04:49:43, skipping insertion in model container [2022-04-05 04:49:43,242 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.04 04:49:43" (3/4) ... [2022-04-05 04:49:43,242 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e657a3b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.04 04:49:43, skipping insertion in model container [2022-04-05 04:49:43,243 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 05.04 04:49:43" (4/4) ... [2022-04-05 04:49:43,243 INFO L111 eAbstractionObserver]: Analyzing ICFG n.c24.iqvasr [2022-04-05 04:49:43,247 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-04-05 04:49:43,247 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-05 04:49:43,287 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-05 04:49:43,292 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 [2022-04-05 04:49:43,292 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-05 04:49:43,306 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) [2022-04-05 04:49:43,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-04-05 04:49:43,310 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 04:49:43,310 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 04:49:43,311 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 04:49:43,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 04:49:43,315 INFO L85 PathProgramCache]: Analyzing trace with hash 375090633, now seen corresponding path program 1 times [2022-04-05 04:49:43,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 04:49:43,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544236588] [2022-04-05 04:49:43,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 04:49:43,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 04:49:43,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:49:43,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 04:49:43,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:49:43,450 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 04:49:43,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 04:49:43,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544236588] [2022-04-05 04:49:43,451 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544236588] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 04:49:43,451 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 04:49:43,452 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-05 04:49:43,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45627873] [2022-04-05 04:49:43,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 04:49:43,458 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-05 04:49:43,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 04:49:43,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-05 04:49:43,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-05 04:49:43,483 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) [2022-04-05 04:49:43,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 04:49:43,543 INFO L93 Difference]: Finished difference Result 98 states and 133 transitions. [2022-04-05 04:49:43,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-05 04:49:43,550 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 [2022-04-05 04:49:43,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 04:49:43,555 INFO L225 Difference]: With dead ends: 98 [2022-04-05 04:49:43,555 INFO L226 Difference]: Without dead ends: 46 [2022-04-05 04:49:43,557 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 [2022-04-05 04:49:43,562 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 [2022-04-05 04:49:43,563 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] [2022-04-05 04:49:43,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-04-05 04:49:43,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2022-04-05 04:49:43,595 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) [2022-04-05 04:49:43,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 56 transitions. [2022-04-05 04:49:43,597 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 56 transitions. Word has length 13 [2022-04-05 04:49:43,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 04:49:43,597 INFO L478 AbstractCegarLoop]: Abstraction has 46 states and 56 transitions. [2022-04-05 04:49:43,598 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) [2022-04-05 04:49:43,598 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 56 transitions. [2022-04-05 04:49:43,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-04-05 04:49:43,598 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 04:49:43,598 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 04:49:43,598 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-05 04:49:43,599 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 04:49:43,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 04:49:43,599 INFO L85 PathProgramCache]: Analyzing trace with hash 376014154, now seen corresponding path program 1 times [2022-04-05 04:49:43,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 04:49:43,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767323348] [2022-04-05 04:49:43,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 04:49:43,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 04:49:43,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:49:43,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 04:49:43,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:49:43,645 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 04:49:43,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 04:49:43,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767323348] [2022-04-05 04:49:43,645 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767323348] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 04:49:43,645 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 04:49:43,645 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-05 04:49:43,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039275170] [2022-04-05 04:49:43,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 04:49:43,646 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-05 04:49:43,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 04:49:43,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-05 04:49:43,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-05 04:49:43,647 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) [2022-04-05 04:49:43,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 04:49:43,777 INFO L93 Difference]: Finished difference Result 107 states and 138 transitions. [2022-04-05 04:49:43,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-05 04:49:43,778 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 [2022-04-05 04:49:43,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 04:49:43,779 INFO L225 Difference]: With dead ends: 107 [2022-04-05 04:49:43,779 INFO L226 Difference]: Without dead ends: 69 [2022-04-05 04:49:43,779 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 [2022-04-05 04:49:43,780 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 [2022-04-05 04:49:43,780 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] [2022-04-05 04:49:43,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-04-05 04:49:43,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 48. [2022-04-05 04:49:43,793 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) [2022-04-05 04:49:43,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 58 transitions. [2022-04-05 04:49:43,794 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 58 transitions. Word has length 13 [2022-04-05 04:49:43,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 04:49:43,794 INFO L478 AbstractCegarLoop]: Abstraction has 48 states and 58 transitions. [2022-04-05 04:49:43,794 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) [2022-04-05 04:49:43,794 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 58 transitions. [2022-04-05 04:49:43,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-04-05 04:49:43,795 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 04:49:43,795 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] [2022-04-05 04:49:43,795 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-04-05 04:49:43,795 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 04:49:43,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 04:49:43,795 INFO L85 PathProgramCache]: Analyzing trace with hash -1312963868, now seen corresponding path program 1 times [2022-04-05 04:49:43,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 04:49:43,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758978217] [2022-04-05 04:49:43,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 04:49:43,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 04:49:43,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:49:43,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 04:49:43,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:49:43,857 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-05 04:49:43,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 04:49:43,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758978217] [2022-04-05 04:49:43,858 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758978217] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 04:49:43,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973138317] [2022-04-05 04:49:43,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 04:49:43,858 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 04:49:43,858 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 04:49:43,859 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) [2022-04-05 04:49:43,860 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-04-05 04:49:43,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:49:43,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 3 conjunts are in the unsatisfiable core [2022-04-05 04:49:43,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 04:49:44,015 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-05 04:49:44,015 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 04:49:44,068 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-05 04:49:44,068 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1973138317] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 04:49:44,069 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 04:49:44,069 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-04-05 04:49:44,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862507612] [2022-04-05 04:49:44,069 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 04:49:44,069 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-05 04:49:44,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 04:49:44,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-05 04:49:44,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-04-05 04:49:44,070 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) [2022-04-05 04:49:44,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 04:49:44,307 INFO L93 Difference]: Finished difference Result 156 states and 211 transitions. [2022-04-05 04:49:44,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-05 04:49:44,307 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 [2022-04-05 04:49:44,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 04:49:44,308 INFO L225 Difference]: With dead ends: 156 [2022-04-05 04:49:44,308 INFO L226 Difference]: Without dead ends: 117 [2022-04-05 04:49:44,309 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 [2022-04-05 04:49:44,309 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 [2022-04-05 04:49:44,324 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] [2022-04-05 04:49:44,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2022-04-05 04:49:44,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2022-04-05 04:49:44,345 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) [2022-04-05 04:49:44,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 157 transitions. [2022-04-05 04:49:44,349 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 157 transitions. Word has length 20 [2022-04-05 04:49:44,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 04:49:44,349 INFO L478 AbstractCegarLoop]: Abstraction has 117 states and 157 transitions. [2022-04-05 04:49:44,350 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) [2022-04-05 04:49:44,350 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 157 transitions. [2022-04-05 04:49:44,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-04-05 04:49:44,352 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 04:49:44,352 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] [2022-04-05 04:49:44,373 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-04-05 04:49:44,571 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 [2022-04-05 04:49:44,572 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 04:49:44,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 04:49:44,572 INFO L85 PathProgramCache]: Analyzing trace with hash 1600944834, now seen corresponding path program 2 times [2022-04-05 04:49:44,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 04:49:44,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852925489] [2022-04-05 04:49:44,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 04:49:44,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 04:49:44,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:49:44,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 04:49:44,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:49:44,663 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-04-05 04:49:44,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 04:49:44,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852925489] [2022-04-05 04:49:44,663 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852925489] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 04:49:44,663 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 04:49:44,663 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-05 04:49:44,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922779462] [2022-04-05 04:49:44,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 04:49:44,664 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-05 04:49:44,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 04:49:44,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-05 04:49:44,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-04-05 04:49:44,664 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) [2022-04-05 04:49:44,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 04:49:44,802 INFO L93 Difference]: Finished difference Result 204 states and 284 transitions. [2022-04-05 04:49:44,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-05 04:49:44,802 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 [2022-04-05 04:49:44,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 04:49:44,803 INFO L225 Difference]: With dead ends: 204 [2022-04-05 04:49:44,803 INFO L226 Difference]: Without dead ends: 199 [2022-04-05 04:49:44,804 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 [2022-04-05 04:49:44,804 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 [2022-04-05 04:49:44,805 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] [2022-04-05 04:49:44,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2022-04-05 04:49:44,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 118. [2022-04-05 04:49:44,813 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) [2022-04-05 04:49:44,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 159 transitions. [2022-04-05 04:49:44,814 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 159 transitions. Word has length 41 [2022-04-05 04:49:44,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 04:49:44,814 INFO L478 AbstractCegarLoop]: Abstraction has 118 states and 159 transitions. [2022-04-05 04:49:44,814 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) [2022-04-05 04:49:44,814 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 159 transitions. [2022-04-05 04:49:44,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-04-05 04:49:44,815 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 04:49:44,816 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] [2022-04-05 04:49:44,816 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-04-05 04:49:44,816 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 04:49:44,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 04:49:44,816 INFO L85 PathProgramCache]: Analyzing trace with hash -1931579242, now seen corresponding path program 1 times [2022-04-05 04:49:44,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 04:49:44,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561546973] [2022-04-05 04:49:44,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 04:49:44,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 04:49:44,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:49:44,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 04:49:44,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:49:44,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-04-05 04:49:44,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:49:44,911 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-04-05 04:49:44,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 04:49:44,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561546973] [2022-04-05 04:49:44,911 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561546973] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 04:49:44,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [514729668] [2022-04-05 04:49:44,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 04:49:44,911 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 04:49:44,911 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 04:49:44,915 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) [2022-04-05 04:49:44,932 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-04-05 04:49:45,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:49:45,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 6 conjunts are in the unsatisfiable core [2022-04-05 04:49:45,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 04:49:45,097 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-04-05 04:49:45,097 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 04:49:45,208 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-04-05 04:49:45,208 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [514729668] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 04:49:45,208 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 04:49:45,208 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 15 [2022-04-05 04:49:45,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163293048] [2022-04-05 04:49:45,209 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 04:49:45,209 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-04-05 04:49:45,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 04:49:45,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-04-05 04:49:45,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2022-04-05 04:49:45,210 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) [2022-04-05 04:49:45,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 04:49:45,717 INFO L93 Difference]: Finished difference Result 383 states and 553 transitions. [2022-04-05 04:49:45,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-04-05 04:49:45,717 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 [2022-04-05 04:49:45,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 04:49:45,720 INFO L225 Difference]: With dead ends: 383 [2022-04-05 04:49:45,720 INFO L226 Difference]: Without dead ends: 280 [2022-04-05 04:49:45,720 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 [2022-04-05 04:49:45,721 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 [2022-04-05 04:49:45,721 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] [2022-04-05 04:49:45,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2022-04-05 04:49:45,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 256. [2022-04-05 04:49:45,740 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) [2022-04-05 04:49:45,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 357 transitions. [2022-04-05 04:49:45,742 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 357 transitions. Word has length 50 [2022-04-05 04:49:45,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 04:49:45,743 INFO L478 AbstractCegarLoop]: Abstraction has 256 states and 357 transitions. [2022-04-05 04:49:45,743 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) [2022-04-05 04:49:45,743 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 357 transitions. [2022-04-05 04:49:45,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-04-05 04:49:45,750 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 04:49:45,750 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] [2022-04-05 04:49:45,768 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-04-05 04:49:45,959 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 [2022-04-05 04:49:45,960 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 04:49:45,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 04:49:45,960 INFO L85 PathProgramCache]: Analyzing trace with hash 554606818, now seen corresponding path program 2 times [2022-04-05 04:49:45,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 04:49:45,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802315770] [2022-04-05 04:49:45,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 04:49:45,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 04:49:46,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:49:46,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 04:49:46,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:49:46,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2022-04-05 04:49:46,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:49:46,116 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2022-04-05 04:49:46,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 04:49:46,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802315770] [2022-04-05 04:49:46,116 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802315770] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 04:49:46,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914344803] [2022-04-05 04:49:46,116 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-05 04:49:46,116 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 04:49:46,116 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 04:49:46,117 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) [2022-04-05 04:49:46,126 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-04-05 04:49:46,220 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-05 04:49:46,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 04:49:46,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 12 conjunts are in the unsatisfiable core [2022-04-05 04:49:46,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 04:49:46,335 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2022-04-05 04:49:46,335 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 04:49:46,606 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2022-04-05 04:49:46,607 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1914344803] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 04:49:46,607 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 04:49:46,607 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 13] total 27 [2022-04-05 04:49:46,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782347599] [2022-04-05 04:49:46,607 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 04:49:46,609 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-04-05 04:49:46,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 04:49:46,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-04-05 04:49:46,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=304, Invalid=398, Unknown=0, NotChecked=0, Total=702 [2022-04-05 04:49:46,611 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) [2022-04-05 04:49:47,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 04:49:47,756 INFO L93 Difference]: Finished difference Result 803 states and 1183 transitions. [2022-04-05 04:49:47,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-04-05 04:49:47,757 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 [2022-04-05 04:49:47,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 04:49:47,760 INFO L225 Difference]: With dead ends: 803 [2022-04-05 04:49:47,760 INFO L226 Difference]: Without dead ends: 574 [2022-04-05 04:49:47,761 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 [2022-04-05 04:49:47,762 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 1347 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 1147 mSolverCounterSat, 625 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s 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 [2022-04-05 04:49:47,762 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] [2022-04-05 04:49:47,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 574 states. [2022-04-05 04:49:47,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 574 to 532. [2022-04-05 04:49:47,793 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) [2022-04-05 04:49:47,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 532 states to 532 states and 753 transitions. [2022-04-05 04:49:47,795 INFO L78 Accepts]: Start accepts. Automaton has 532 states and 753 transitions. Word has length 92 [2022-04-05 04:49:47,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 04:49:47,795 INFO L478 AbstractCegarLoop]: Abstraction has 532 states and 753 transitions. [2022-04-05 04:49:47,795 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) [2022-04-05 04:49:47,795 INFO L276 IsEmpty]: Start isEmpty. Operand 532 states and 753 transitions. [2022-04-05 04:49:47,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2022-04-05 04:49:47,797 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 04:49:47,798 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] [2022-04-05 04:49:47,816 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-04-05 04:49:48,005 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 [2022-04-05 04:49:48,005 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 04:49:48,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 04:49:48,006 INFO L85 PathProgramCache]: Analyzing trace with hash 1450933626, now seen corresponding path program 3 times [2022-04-05 04:49:48,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 04:49:48,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099860887] [2022-04-05 04:49:48,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 04:49:48,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 04:49:48,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:49:48,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 04:49:48,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:49:48,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 161 [2022-04-05 04:49:48,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:49:48,382 INFO L134 CoverageAnalysis]: Checked inductivity of 1683 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 1199 trivial. 0 not checked. [2022-04-05 04:49:48,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 04:49:48,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099860887] [2022-04-05 04:49:48,382 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099860887] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 04:49:48,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813209769] [2022-04-05 04:49:48,382 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-05 04:49:48,382 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 04:49:48,382 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 04:49:48,383 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) [2022-04-05 04:49:48,384 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-04-05 04:49:48,471 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-04-05 04:49:48,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 04:49:48,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-05 04:49:48,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 04:49:48,746 INFO L134 CoverageAnalysis]: Checked inductivity of 1683 backedges. 85 proven. 1 refuted. 0 times theorem prover too weak. 1597 trivial. 0 not checked. [2022-04-05 04:49:48,746 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 04:49:49,021 INFO L134 CoverageAnalysis]: Checked inductivity of 1683 backedges. 85 proven. 1 refuted. 0 times theorem prover too weak. 1597 trivial. 0 not checked. [2022-04-05 04:49:49,022 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1813209769] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 04:49:49,022 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 04:49:49,022 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 7, 7] total 35 [2022-04-05 04:49:49,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043626021] [2022-04-05 04:49:49,022 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 04:49:49,023 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-04-05 04:49:49,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 04:49:49,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-04-05 04:49:49,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=861, Unknown=0, NotChecked=0, Total=1190 [2022-04-05 04:49:49,024 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) [2022-04-05 04:49:56,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 04:49:56,160 INFO L93 Difference]: Finished difference Result 2639 states and 3948 transitions. [2022-04-05 04:49:56,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 174 states. [2022-04-05 04:49:56,160 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 [2022-04-05 04:49:56,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 04:49:56,171 INFO L225 Difference]: With dead ends: 2639 [2022-04-05 04:49:56,172 INFO L226 Difference]: Without dead ends: 2153 [2022-04-05 04:49:56,179 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 647 GetRequests, 443 SyntacticMatches, 1 SemanticMatches, 203 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16044 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=10951, Invalid=30869, Unknown=0, NotChecked=0, Total=41820 [2022-04-05 04:49:56,180 INFO L913 BasicCegarLoop]: 41 mSDtfsCounter, 4714 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 4411 mSolverCounterSat, 2670 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s 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, 2.6s IncrementalHoareTripleChecker+Time [2022-04-05 04:49:56,181 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [4714 Valid, 61 Invalid, 7081 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2670 Valid, 4411 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-04-05 04:49:56,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2153 states. [2022-04-05 04:49:56,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2153 to 606. [2022-04-05 04:49:56,257 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) [2022-04-05 04:49:56,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 606 states to 606 states and 867 transitions. [2022-04-05 04:49:56,259 INFO L78 Accepts]: Start accepts. Automaton has 606 states and 867 transitions. Word has length 176 [2022-04-05 04:49:56,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 04:49:56,259 INFO L478 AbstractCegarLoop]: Abstraction has 606 states and 867 transitions. [2022-04-05 04:49:56,259 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) [2022-04-05 04:49:56,259 INFO L276 IsEmpty]: Start isEmpty. Operand 606 states and 867 transitions. [2022-04-05 04:49:56,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2022-04-05 04:49:56,262 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 04:49:56,262 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] [2022-04-05 04:49:56,279 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-04-05 04:49:56,478 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 [2022-04-05 04:49:56,478 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 04:49:56,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 04:49:56,479 INFO L85 PathProgramCache]: Analyzing trace with hash 474193616, now seen corresponding path program 4 times [2022-04-05 04:49:56,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 04:49:56,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47084834] [2022-04-05 04:49:56,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 04:49:56,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 04:49:56,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:49:56,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 04:49:56,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:49:56,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 168 [2022-04-05 04:49:56,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:49:56,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 177 [2022-04-05 04:49:56,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:49:56,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 186 [2022-04-05 04:49:56,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:49:56,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 195 [2022-04-05 04:49:56,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:49:56,817 INFO L134 CoverageAnalysis]: Checked inductivity of 1963 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 1434 trivial. 0 not checked. [2022-04-05 04:49:56,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 04:49:56,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47084834] [2022-04-05 04:49:56,817 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47084834] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 04:49:56,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32171342] [2022-04-05 04:49:56,817 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-05 04:49:56,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 04:49:56,817 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 04:49:56,818 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) [2022-04-05 04:49:56,819 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-04-05 04:49:56,958 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-05 04:49:56,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 04:49:56,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 804 conjuncts, 25 conjunts are in the unsatisfiable core [2022-04-05 04:49:56,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 04:49:57,263 INFO L134 CoverageAnalysis]: Checked inductivity of 1963 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 1434 trivial. 0 not checked. [2022-04-05 04:49:57,263 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 04:49:58,061 INFO L134 CoverageAnalysis]: Checked inductivity of 1963 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 1434 trivial. 0 not checked. [2022-04-05 04:49:58,061 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [32171342] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 04:49:58,061 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 04:49:58,061 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 26, 26] total 53 [2022-04-05 04:49:58,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283400015] [2022-04-05 04:49:58,062 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 04:49:58,062 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-04-05 04:49:58,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 04:49:58,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-04-05 04:49:58,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1279, Invalid=1477, Unknown=0, NotChecked=0, Total=2756 [2022-04-05 04:49:58,064 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) [2022-04-05 04:50:01,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 04:50:01,072 INFO L93 Difference]: Finished difference Result 3090 states and 4813 transitions. [2022-04-05 04:50:01,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-04-05 04:50:01,072 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 [2022-04-05 04:50:01,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 04:50:01,081 INFO L225 Difference]: With dead ends: 3090 [2022-04-05 04:50:01,081 INFO L226 Difference]: Without dead ends: 2537 [2022-04-05 04:50:01,084 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 506 GetRequests, 405 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1685 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=3834, Invalid=6672, Unknown=0, NotChecked=0, Total=10506 [2022-04-05 04:50:01,084 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 2862 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2557 mSolverCounterSat, 1299 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s 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, 1.6s IncrementalHoareTripleChecker+Time [2022-04-05 04:50:01,085 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2862 Valid, 51 Invalid, 3856 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1299 Valid, 2557 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-04-05 04:50:01,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2537 states. [2022-04-05 04:50:01,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2537 to 1181. [2022-04-05 04:50:01,168 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) [2022-04-05 04:50:01,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1181 states to 1181 states and 1692 transitions. [2022-04-05 04:50:01,172 INFO L78 Accepts]: Start accepts. Automaton has 1181 states and 1692 transitions. Word has length 210 [2022-04-05 04:50:01,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 04:50:01,172 INFO L478 AbstractCegarLoop]: Abstraction has 1181 states and 1692 transitions. [2022-04-05 04:50:01,173 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) [2022-04-05 04:50:01,173 INFO L276 IsEmpty]: Start isEmpty. Operand 1181 states and 1692 transitions. [2022-04-05 04:50:01,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 386 [2022-04-05 04:50:01,179 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 04:50:01,180 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] [2022-04-05 04:50:01,199 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-04-05 04:50:01,386 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 [2022-04-05 04:50:01,387 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 04:50:01,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 04:50:01,387 INFO L85 PathProgramCache]: Analyzing trace with hash 1388474346, now seen corresponding path program 5 times [2022-04-05 04:50:01,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 04:50:01,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205622075] [2022-04-05 04:50:01,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 04:50:01,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 04:50:01,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:50:02,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 04:50:02,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:50:02,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 343 [2022-04-05 04:50:02,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:50:02,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 352 [2022-04-05 04:50:02,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:50:02,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 361 [2022-04-05 04:50:02,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:50:02,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 370 [2022-04-05 04:50:02,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:50:02,398 INFO L134 CoverageAnalysis]: Checked inductivity of 8238 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 5934 trivial. 0 not checked. [2022-04-05 04:50:02,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 04:50:02,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205622075] [2022-04-05 04:50:02,399 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205622075] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 04:50:02,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758207034] [2022-04-05 04:50:02,399 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-04-05 04:50:02,399 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 04:50:02,399 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 04:50:02,400 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) [2022-04-05 04:50:02,435 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-04-05 04:50:54,937 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 49 check-sat command(s) [2022-04-05 04:50:54,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 04:50:55,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 1454 conjuncts, 50 conjunts are in the unsatisfiable core [2022-04-05 04:50:55,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 04:50:55,478 INFO L134 CoverageAnalysis]: Checked inductivity of 8238 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 5934 trivial. 0 not checked. [2022-04-05 04:50:55,479 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 04:50:57,943 INFO L134 CoverageAnalysis]: Checked inductivity of 8238 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 5934 trivial. 0 not checked. [2022-04-05 04:50:57,943 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1758207034] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 04:50:57,943 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 04:50:57,943 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 51, 51] total 103 [2022-04-05 04:50:57,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448623038] [2022-04-05 04:50:57,944 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 04:50:57,944 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 103 states [2022-04-05 04:50:57,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 04:50:57,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2022-04-05 04:50:57,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5054, Invalid=5452, Unknown=0, NotChecked=0, Total=10506 [2022-04-05 04:50:57,947 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) [2022-04-05 04:51:09,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 04:51:09,786 INFO L93 Difference]: Finished difference Result 6115 states and 9538 transitions. [2022-04-05 04:51:09,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2022-04-05 04:51:09,786 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 [2022-04-05 04:51:09,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 04:51:09,805 INFO L225 Difference]: With dead ends: 6115 [2022-04-05 04:51:09,805 INFO L226 Difference]: Without dead ends: 5037 [2022-04-05 04:51:09,810 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 931 GetRequests, 730 SyntacticMatches, 0 SemanticMatches, 201 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6510 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=15159, Invalid=25847, Unknown=0, NotChecked=0, Total=41006 [2022-04-05 04:51:09,812 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, 3.5s IncrementalHoareTripleChecker+Time [2022-04-05 04:51:09,812 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [5689 Valid, 51 Invalid, 8449 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2789 Valid, 5660 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2022-04-05 04:51:09,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5037 states. [2022-04-05 04:51:10,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5037 to 2331. [2022-04-05 04:51:10,028 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) [2022-04-05 04:51:10,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2331 states to 2331 states and 3342 transitions. [2022-04-05 04:51:10,034 INFO L78 Accepts]: Start accepts. Automaton has 2331 states and 3342 transitions. Word has length 385 [2022-04-05 04:51:10,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 04:51:10,035 INFO L478 AbstractCegarLoop]: Abstraction has 2331 states and 3342 transitions. [2022-04-05 04:51:10,036 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) [2022-04-05 04:51:10,036 INFO L276 IsEmpty]: Start isEmpty. Operand 2331 states and 3342 transitions. [2022-04-05 04:51:10,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 736 [2022-04-05 04:51:10,050 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 04:51:10,050 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] [2022-04-05 04:51:10,089 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-04-05 04:51:10,265 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 [2022-04-05 04:51:10,265 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 04:51:10,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 04:51:10,266 INFO L85 PathProgramCache]: Analyzing trace with hash 496748614, now seen corresponding path program 6 times [2022-04-05 04:51:10,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 04:51:10,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233017255] [2022-04-05 04:51:10,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 04:51:10,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 04:51:10,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:51:13,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 04:51:13,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:51:13,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 693 [2022-04-05 04:51:13,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:51:13,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 702 [2022-04-05 04:51:13,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:51:13,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 711 [2022-04-05 04:51:13,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:51:13,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 720 [2022-04-05 04:51:13,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:51:13,492 INFO L134 CoverageAnalysis]: Checked inductivity of 33913 backedges. 0 proven. 9604 refuted. 0 times theorem prover too weak. 24309 trivial. 0 not checked. [2022-04-05 04:51:13,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 04:51:13,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233017255] [2022-04-05 04:51:13,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233017255] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 04:51:13,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003993667] [2022-04-05 04:51:13,492 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-05 04:51:13,493 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 04:51:13,493 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 04:51:13,493 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) [2022-04-05 04:51:13,495 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-04-05 04:51:13,805 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2022-04-05 04:51:13,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 04:51:13,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 466 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-05 04:51:13,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 04:51:14,868 INFO L134 CoverageAnalysis]: Checked inductivity of 33913 backedges. 680 proven. 40 refuted. 0 times theorem prover too weak. 33193 trivial. 0 not checked. [2022-04-05 04:51:14,868 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 04:51:16,047 INFO L134 CoverageAnalysis]: Checked inductivity of 33913 backedges. 680 proven. 40 refuted. 0 times theorem prover too weak. 33193 trivial. 0 not checked. [2022-04-05 04:51:16,048 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1003993667] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 04:51:16,048 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 04:51:16,048 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [103, 10, 10] total 117 [2022-04-05 04:51:16,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923261354] [2022-04-05 04:51:16,048 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 04:51:16,049 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 117 states [2022-04-05 04:51:16,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 04:51:16,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 117 interpolants. [2022-04-05 04:51:16,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5130, Invalid=8442, Unknown=0, NotChecked=0, Total=13572 [2022-04-05 04:51:16,052 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) [2022-04-05 04:58:22,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 04:58:22,605 INFO L93 Difference]: Finished difference Result 23041 states and 35166 transitions. [2022-04-05 04:58:22,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 1606 states. [2022-04-05 04:58:22,606 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 [2022-04-05 04:58:22,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 04:58:22,677 INFO L225 Difference]: With dead ends: 23041 [2022-04-05 04:58:22,677 INFO L226 Difference]: Without dead ends: 20905 [2022-04-05 04:58:22,931 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 3886 GetRequests, 2168 SyntacticMatches, 1 SemanticMatches, 1717 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1605796 ImplicationChecksByTransitivity, 115.8s TimeCoverageRelationStatistics Valid=715091, Invalid=2238151, Unknown=0, NotChecked=0, Total=2953242 [2022-04-05 04:58:22,931 INFO L913 BasicCegarLoop]: 41 mSDtfsCounter, 42957 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 37287 mSolverCounterSat, 35138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19.0s 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, 22.7s IncrementalHoareTripleChecker+Time [2022-04-05 04:58:22,932 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [42957 Valid, 69 Invalid, 72425 Unknown, 0 Unchecked, 0.3s Time], IncrementalHoareTripleChecker [35138 Valid, 37287 Invalid, 0 Unknown, 0 Unchecked, 22.7s Time] [2022-04-05 04:58:22,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20905 states. [2022-04-05 04:58:23,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20905 to 2456. [2022-04-05 04:58:23,396 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) [2022-04-05 04:58:23,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2456 states to 2456 states and 3537 transitions. [2022-04-05 04:58:23,402 INFO L78 Accepts]: Start accepts. Automaton has 2456 states and 3537 transitions. Word has length 735 [2022-04-05 04:58:23,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 04:58:23,402 INFO L478 AbstractCegarLoop]: Abstraction has 2456 states and 3537 transitions. [2022-04-05 04:58:23,403 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) [2022-04-05 04:58:23,403 INFO L276 IsEmpty]: Start isEmpty. Operand 2456 states and 3537 transitions. [2022-04-05 04:58:23,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 797 [2022-04-05 04:58:23,412 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 04:58:23,412 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] [2022-04-05 04:58:23,430 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-04-05 04:58:23,630 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 [2022-04-05 04:58:23,630 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 04:58:23,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 04:58:23,630 INFO L85 PathProgramCache]: Analyzing trace with hash -904605208, now seen corresponding path program 7 times [2022-04-05 04:58:23,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 04:58:23,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199669423] [2022-04-05 04:58:23,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 04:58:23,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 04:58:23,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:58:26,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 04:58:26,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:58:26,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 700 [2022-04-05 04:58:26,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:58:26,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 709 [2022-04-05 04:58:26,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:58:26,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 718 [2022-04-05 04:58:26,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:58:26,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 727 [2022-04-05 04:58:26,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:58:26,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 736 [2022-04-05 04:58:26,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:58:26,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 745 [2022-04-05 04:58:26,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:58:26,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 754 [2022-04-05 04:58:26,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:58:26,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 763 [2022-04-05 04:58:26,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:58:26,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 772 [2022-04-05 04:58:26,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:58:26,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 781 [2022-04-05 04:58:26,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:58:26,932 INFO L134 CoverageAnalysis]: Checked inductivity of 35550 backedges. 0 proven. 9801 refuted. 0 times theorem prover too weak. 25749 trivial. 0 not checked. [2022-04-05 04:58:26,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 04:58:26,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199669423] [2022-04-05 04:58:26,932 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199669423] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 04:58:26,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1366760277] [2022-04-05 04:58:26,932 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-04-05 04:58:26,933 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 04:58:26,933 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 04:58:26,933 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) [2022-04-05 04:58:26,935 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-04-05 04:58:27,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:58:27,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 2972 conjuncts, 101 conjunts are in the unsatisfiable core [2022-04-05 04:58:27,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 04:58:28,244 INFO L134 CoverageAnalysis]: Checked inductivity of 35550 backedges. 0 proven. 9801 refuted. 0 times theorem prover too weak. 25749 trivial. 0 not checked. [2022-04-05 04:58:28,245 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 04:58:37,283 INFO L134 CoverageAnalysis]: Checked inductivity of 35550 backedges. 0 proven. 9801 refuted. 0 times theorem prover too weak. 25749 trivial. 0 not checked. [2022-04-05 04:58:37,284 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1366760277] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 04:58:37,284 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 04:58:37,285 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [104, 102, 102] total 205 [2022-04-05 04:58:37,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003659484] [2022-04-05 04:58:37,285 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 04:58:37,287 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 205 states [2022-04-05 04:58:37,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 04:58:37,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 205 interpolants. [2022-04-05 04:58:37,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20507, Invalid=21313, Unknown=0, NotChecked=0, Total=41820 [2022-04-05 04:58:37,299 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) [2022-04-05 05:00:13,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 05:00:13,973 INFO L93 Difference]: Finished difference Result 22792 states and 36475 transitions. [2022-04-05 05:00:13,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 206 states. [2022-04-05 05:00:13,974 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 [2022-04-05 05:00:13,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 05:00:14,034 INFO L225 Difference]: With dead ends: 22792 [2022-04-05 05:00:14,034 INFO L226 Difference]: Without dead ends: 20541 [2022-04-05 05:00:14,055 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1918 GetRequests, 1513 SyntacticMatches, 0 SemanticMatches, 405 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26043 ImplicationChecksByTransitivity, 22.2s TimeCoverageRelationStatistics Valid=61518, Invalid=103724, Unknown=0, NotChecked=0, Total=165242 [2022-04-05 05:00:14,055 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 12727 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 11944 mSolverCounterSat, 6532 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s 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, 7.7s IncrementalHoareTripleChecker+Time [2022-04-05 05:00:14,055 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [12727 Valid, 57 Invalid, 18476 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [6532 Valid, 11944 Invalid, 0 Unknown, 0 Unchecked, 7.7s Time] [2022-04-05 05:00:14,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20541 states. [2022-04-05 05:00:14,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20541 to 4779. [2022-04-05 05:00:14,891 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) [2022-04-05 05:00:14,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4779 states to 4779 states and 6870 transitions. [2022-04-05 05:00:14,899 INFO L78 Accepts]: Start accepts. Automaton has 4779 states and 6870 transitions. Word has length 796 [2022-04-05 05:00:14,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 05:00:14,900 INFO L478 AbstractCegarLoop]: Abstraction has 4779 states and 6870 transitions. [2022-04-05 05:00:14,900 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) [2022-04-05 05:00:14,900 INFO L276 IsEmpty]: Start isEmpty. Operand 4779 states and 6870 transitions. [2022-04-05 05:00:14,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1504 [2022-04-05 05:00:14,922 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 05:00:14,923 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] [2022-04-05 05:00:14,945 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-04-05 05:00:15,127 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 [2022-04-05 05:00:15,128 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 05:00:15,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 05:00:15,128 INFO L85 PathProgramCache]: Analyzing trace with hash 319105338, now seen corresponding path program 8 times [2022-04-05 05:00:15,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 05:00:15,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127166116] [2022-04-05 05:00:15,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 05:00:15,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 05:00:15,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:00:27,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 05:00:27,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:00:27,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1407 [2022-04-05 05:00:27,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:00:27,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1416 [2022-04-05 05:00:27,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:00:27,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1425 [2022-04-05 05:00:27,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:00:27,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1434 [2022-04-05 05:00:27,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:00:27,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1443 [2022-04-05 05:00:27,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:00:27,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1452 [2022-04-05 05:00:27,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:00:27,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1461 [2022-04-05 05:00:27,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:00:27,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1470 [2022-04-05 05:00:27,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:00:27,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1479 [2022-04-05 05:00:27,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:00:27,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1488 [2022-04-05 05:00:27,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:00:27,267 INFO L134 CoverageAnalysis]: Checked inductivity of 142105 backedges. 0 proven. 40000 refuted. 0 times theorem prover too weak. 102105 trivial. 0 not checked. [2022-04-05 05:00:27,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 05:00:27,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127166116] [2022-04-05 05:00:27,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127166116] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 05:00:27,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785239748] [2022-04-05 05:00:27,267 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-05 05:00:27,267 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 05:00:27,267 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 05:00:27,268 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) [2022-04-05 05:00:27,269 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-04-05 05:00:28,053 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-05 05:00:28,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 05:00:28,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 5598 conjuncts, 202 conjunts are in the unsatisfiable core [2022-04-05 05:00:28,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 05:00:29,624 INFO L134 CoverageAnalysis]: Checked inductivity of 142105 backedges. 0 proven. 40000 refuted. 0 times theorem prover too weak. 102105 trivial. 0 not checked. [2022-04-05 05:00:29,624 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 05:01:04,954 INFO L134 CoverageAnalysis]: Checked inductivity of 142105 backedges. 0 proven. 40000 refuted. 0 times theorem prover too weak. 102105 trivial. 0 not checked. [2022-04-05 05:01:04,955 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [785239748] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 05:01:04,955 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 05:01:04,955 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [205, 203, 203] total 407 [2022-04-05 05:01:04,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44098192] [2022-04-05 05:01:04,955 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 05:01:04,957 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 407 states [2022-04-05 05:01:04,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 05:01:04,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 407 interpolants. [2022-04-05 05:01:04,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81814, Invalid=83428, Unknown=0, NotChecked=0, Total=165242 [2022-04-05 05:01:04,984 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)