/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/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf -i ../../../trunk/examples/svcomp/loops/n.c24.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-20 12:46:06,381 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 12:46:06,382 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 12:46:06,403 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-20 12:46:06,403 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-20 12:46:06,404 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-20 12:46:06,405 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-20 12:46:06,406 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-20 12:46:06,407 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-20 12:46:06,407 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-20 12:46:06,408 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-20 12:46:06,408 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-20 12:46:06,409 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-20 12:46:06,409 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-20 12:46:06,410 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-20 12:46:06,411 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-20 12:46:06,411 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-20 12:46:06,412 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-20 12:46:06,413 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-20 12:46:06,414 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-20 12:46:06,415 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-20 12:46:06,417 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-20 12:46:06,418 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-20 12:46:06,419 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-20 12:46:06,419 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-20 12:46:06,421 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-03-20 12:46:06,421 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-03-20 12:46:06,421 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-03-20 12:46:06,422 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-03-20 12:46:06,422 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-03-20 12:46:06,422 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2022-03-20 12:46:06,426 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-20 12:46:06,426 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-20 12:46:06,427 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-20 12:46:06,427 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2022-03-20 12:46:06,433 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 12:46:06,434 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 12:46:06,434 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 12:46:06,435 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-20 12:46:06,435 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 12:46:06,435 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-20 12:46:06,435 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 12:46:06,435 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 12:46:06,435 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 12:46:06,435 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 12:46:06,435 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-20 12:46:06,435 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 12:46:06,436 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 12:46:06,436 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 12:46:06,436 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 12:46:06,436 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 12:46:06,436 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-20 12:46:06,436 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 12:46:06,436 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 12:46:06,436 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 12:46:06,436 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-20 12:46:06,437 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-20 12:46:06,437 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-20 12:46:06,437 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-20 12:46:06,437 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-03-20 12:46:06,437 INFO L138 SettingsManager]: * Use separate solver for trace checks=false 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 12:46:06,626 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 12:46:06,643 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 12:46:06,645 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 12:46:06,646 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 12:46:06,647 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 12:46:06,648 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/n.c24.i [2022-03-20 12:46:06,723 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/af173c63a/1636b76c703842ceb5bc1db7c3bcba8f/FLAG64bf34ab0 [2022-03-20 12:46:07,074 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 12:46:07,074 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/n.c24.i [2022-03-20 12:46:07,080 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/af173c63a/1636b76c703842ceb5bc1db7c3bcba8f/FLAG64bf34ab0 [2022-03-20 12:46:07,101 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/af173c63a/1636b76c703842ceb5bc1db7c3bcba8f [2022-03-20 12:46:07,103 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 12:46:07,104 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-20 12:46:07,105 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 12:46:07,105 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 12:46:07,108 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 12:46:07,108 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 12:46:07" (1/1) ... [2022-03-20 12:46:07,109 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@744ef1fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:46:07, skipping insertion in model container [2022-03-20 12:46:07,109 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 12:46:07" (1/1) ... [2022-03-20 12:46:07,114 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 12:46:07,132 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 12:46:07,260 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] [2022-03-20 12:46:07,324 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 12:46:07,343 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 12:46:07,352 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] [2022-03-20 12:46:07,374 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 12:46:07,387 INFO L208 MainTranslator]: Completed translation [2022-03-20 12:46:07,387 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:46:07 WrapperNode [2022-03-20 12:46:07,387 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 12:46:07,388 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 12:46:07,388 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 12:46:07,388 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 12:46:07,396 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:46:07" (1/1) ... [2022-03-20 12:46:07,396 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:46:07" (1/1) ... [2022-03-20 12:46:07,404 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:46:07" (1/1) ... [2022-03-20 12:46:07,404 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:46:07" (1/1) ... [2022-03-20 12:46:07,419 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:46:07" (1/1) ... [2022-03-20 12:46:07,423 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:46:07" (1/1) ... [2022-03-20 12:46:07,425 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:46:07" (1/1) ... [2022-03-20 12:46:07,429 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 12:46:07,430 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 12:46:07,430 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 12:46:07,430 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 12:46:07,433 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:46:07" (1/1) ... [2022-03-20 12:46:07,448 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 12:46:07,456 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:46:07,466 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) [2022-03-20 12:46:07,481 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 [2022-03-20 12:46:07,492 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 12:46:07,492 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 12:46:07,493 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 12:46:07,493 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-20 12:46:07,493 INFO L138 BoogieDeclarations]: Found implementation of procedure bar [2022-03-20 12:46:07,493 INFO L138 BoogieDeclarations]: Found implementation of procedure foo [2022-03-20 12:46:07,493 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 12:46:07,493 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memmove [2022-03-20 12:46:07,494 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-20 12:46:07,494 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 12:46:07,494 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-03-20 12:46:07,494 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-03-20 12:46:07,494 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 12:46:07,494 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 12:46:07,494 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-20 12:46:07,494 INFO L130 BoogieDeclarations]: Found specification of procedure memcpy [2022-03-20 12:46:07,494 INFO L130 BoogieDeclarations]: Found specification of procedure memmove [2022-03-20 12:46:07,495 INFO L130 BoogieDeclarations]: Found specification of procedure memccpy [2022-03-20 12:46:07,495 INFO L130 BoogieDeclarations]: Found specification of procedure memset [2022-03-20 12:46:07,495 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2022-03-20 12:46:07,495 INFO L130 BoogieDeclarations]: Found specification of procedure memchr [2022-03-20 12:46:07,495 INFO L130 BoogieDeclarations]: Found specification of procedure strcpy [2022-03-20 12:46:07,495 INFO L130 BoogieDeclarations]: Found specification of procedure strncpy [2022-03-20 12:46:07,495 INFO L130 BoogieDeclarations]: Found specification of procedure strcat [2022-03-20 12:46:07,495 INFO L130 BoogieDeclarations]: Found specification of procedure strncat [2022-03-20 12:46:07,496 INFO L130 BoogieDeclarations]: Found specification of procedure strcmp [2022-03-20 12:46:07,496 INFO L130 BoogieDeclarations]: Found specification of procedure strncmp [2022-03-20 12:46:07,496 INFO L130 BoogieDeclarations]: Found specification of procedure strcoll [2022-03-20 12:46:07,496 INFO L130 BoogieDeclarations]: Found specification of procedure strxfrm [2022-03-20 12:46:07,496 INFO L130 BoogieDeclarations]: Found specification of procedure strcoll_l [2022-03-20 12:46:07,496 INFO L130 BoogieDeclarations]: Found specification of procedure strxfrm_l [2022-03-20 12:46:07,496 INFO L130 BoogieDeclarations]: Found specification of procedure strdup [2022-03-20 12:46:07,496 INFO L130 BoogieDeclarations]: Found specification of procedure strndup [2022-03-20 12:46:07,497 INFO L130 BoogieDeclarations]: Found specification of procedure strchr [2022-03-20 12:46:07,497 INFO L130 BoogieDeclarations]: Found specification of procedure strrchr [2022-03-20 12:46:07,497 INFO L130 BoogieDeclarations]: Found specification of procedure strcspn [2022-03-20 12:46:07,497 INFO L130 BoogieDeclarations]: Found specification of procedure strspn [2022-03-20 12:46:07,497 INFO L130 BoogieDeclarations]: Found specification of procedure strpbrk [2022-03-20 12:46:07,497 INFO L130 BoogieDeclarations]: Found specification of procedure strstr [2022-03-20 12:46:07,497 INFO L130 BoogieDeclarations]: Found specification of procedure strtok [2022-03-20 12:46:07,497 INFO L130 BoogieDeclarations]: Found specification of procedure __strtok_r [2022-03-20 12:46:07,498 INFO L130 BoogieDeclarations]: Found specification of procedure strtok_r [2022-03-20 12:46:07,498 INFO L130 BoogieDeclarations]: Found specification of procedure strlen [2022-03-20 12:46:07,498 INFO L130 BoogieDeclarations]: Found specification of procedure strnlen [2022-03-20 12:46:07,498 INFO L130 BoogieDeclarations]: Found specification of procedure strerror [2022-03-20 12:46:07,498 INFO L130 BoogieDeclarations]: Found specification of procedure strerror_r [2022-03-20 12:46:07,498 INFO L130 BoogieDeclarations]: Found specification of procedure strerror_l [2022-03-20 12:46:07,498 INFO L130 BoogieDeclarations]: Found specification of procedure __bzero [2022-03-20 12:46:07,499 INFO L130 BoogieDeclarations]: Found specification of procedure bcopy [2022-03-20 12:46:07,499 INFO L130 BoogieDeclarations]: Found specification of procedure bzero [2022-03-20 12:46:07,499 INFO L130 BoogieDeclarations]: Found specification of procedure bcmp [2022-03-20 12:46:07,499 INFO L130 BoogieDeclarations]: Found specification of procedure index [2022-03-20 12:46:07,499 INFO L130 BoogieDeclarations]: Found specification of procedure rindex [2022-03-20 12:46:07,499 INFO L130 BoogieDeclarations]: Found specification of procedure ffs [2022-03-20 12:46:07,499 INFO L130 BoogieDeclarations]: Found specification of procedure strcasecmp [2022-03-20 12:46:07,500 INFO L130 BoogieDeclarations]: Found specification of procedure strncasecmp [2022-03-20 12:46:07,500 INFO L130 BoogieDeclarations]: Found specification of procedure strsep [2022-03-20 12:46:07,500 INFO L130 BoogieDeclarations]: Found specification of procedure strsignal [2022-03-20 12:46:07,500 INFO L130 BoogieDeclarations]: Found specification of procedure __stpcpy [2022-03-20 12:46:07,500 INFO L130 BoogieDeclarations]: Found specification of procedure stpcpy [2022-03-20 12:46:07,500 INFO L130 BoogieDeclarations]: Found specification of procedure __stpncpy [2022-03-20 12:46:07,500 INFO L130 BoogieDeclarations]: Found specification of procedure stpncpy [2022-03-20 12:46:07,500 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-20 12:46:07,500 INFO L130 BoogieDeclarations]: Found specification of procedure bar [2022-03-20 12:46:07,501 INFO L130 BoogieDeclarations]: Found specification of procedure foo [2022-03-20 12:46:07,501 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 12:46:07,501 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 12:46:07,501 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 12:46:07,501 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-03-20 12:46:07,501 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memmove [2022-03-20 12:46:07,501 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 12:46:07,501 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 12:46:07,501 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 12:46:07,501 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 12:46:07,502 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2022-03-20 12:46:07,502 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2022-03-20 12:46:07,614 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 12:46:07,615 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 12:46:07,874 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 12:46:07,880 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 12:46:07,880 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2022-03-20 12:46:07,882 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 12:46:07 BoogieIcfgContainer [2022-03-20 12:46:07,883 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 12:46:07,884 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 12:46:07,885 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 12:46:07,888 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 12:46:07,889 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 12:46:07" (1/3) ... [2022-03-20 12:46:07,889 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@752736e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 12:46:07, skipping insertion in model container [2022-03-20 12:46:07,889 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:46:07" (2/3) ... [2022-03-20 12:46:07,890 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@752736e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 12:46:07, skipping insertion in model container [2022-03-20 12:46:07,890 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 12:46:07" (3/3) ... [2022-03-20 12:46:07,891 INFO L111 eAbstractionObserver]: Analyzing ICFG n.c24.i [2022-03-20 12:46:07,910 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-20 12:46:07,910 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 12:46:07,950 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 12:46:07,955 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=Craig_NestedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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 [2022-03-20 12:46:07,955 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 12:46:07,966 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) [2022-03-20 12:46:07,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-03-20 12:46:07,972 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:46:07,972 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:46:07,972 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:46:07,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:46:07,976 INFO L85 PathProgramCache]: Analyzing trace with hash -29354929, now seen corresponding path program 1 times [2022-03-20 12:46:07,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:46:07,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [927554690] [2022-03-20 12:46:07,991 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 12:46:07,991 INFO L85 PathProgramCache]: Analyzing trace with hash -29354929, now seen corresponding path program 2 times [2022-03-20 12:46:07,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:46:07,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918180754] [2022-03-20 12:46:07,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:46:07,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:46:08,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:46:08,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:46:08,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:46:08,148 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:46:08,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:46:08,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918180754] [2022-03-20 12:46:08,150 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918180754] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:46:08,150 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:46:08,150 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 12:46:08,154 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:46:08,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [927554690] [2022-03-20 12:46:08,154 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [927554690] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:46:08,154 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:46:08,154 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 12:46:08,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982650840] [2022-03-20 12:46:08,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:46:08,158 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-20 12:46:08,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:46:08,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-20 12:46:08,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 12:46:08,186 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) [2022-03-20 12:46:08,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:46:08,267 INFO L93 Difference]: Finished difference Result 98 states and 133 transitions. [2022-03-20 12:46:08,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-20 12:46:08,270 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 [2022-03-20 12:46:08,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:46:08,277 INFO L225 Difference]: With dead ends: 98 [2022-03-20 12:46:08,277 INFO L226 Difference]: Without dead ends: 46 [2022-03-20 12:46:08,280 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 [2022-03-20 12:46:08,285 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 [2022-03-20 12:46:08,286 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] [2022-03-20 12:46:08,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-03-20 12:46:08,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2022-03-20 12:46:08,316 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) [2022-03-20 12:46:08,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 56 transitions. [2022-03-20 12:46:08,318 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 56 transitions. Word has length 13 [2022-03-20 12:46:08,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:46:08,318 INFO L478 AbstractCegarLoop]: Abstraction has 46 states and 56 transitions. [2022-03-20 12:46:08,318 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) [2022-03-20 12:46:08,318 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 56 transitions. [2022-03-20 12:46:08,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-03-20 12:46:08,319 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:46:08,319 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:46:08,319 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-20 12:46:08,319 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:46:08,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:46:08,320 INFO L85 PathProgramCache]: Analyzing trace with hash -1128673794, now seen corresponding path program 1 times [2022-03-20 12:46:08,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:46:08,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [889523507] [2022-03-20 12:46:08,321 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 12:46:08,321 INFO L85 PathProgramCache]: Analyzing trace with hash -1128673794, now seen corresponding path program 2 times [2022-03-20 12:46:08,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:46:08,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422593025] [2022-03-20 12:46:08,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:46:08,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:46:08,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:46:08,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:46:08,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:46:08,365 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:46:08,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:46:08,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422593025] [2022-03-20 12:46:08,365 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422593025] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:46:08,365 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:46:08,365 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 12:46:08,366 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:46:08,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [889523507] [2022-03-20 12:46:08,366 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [889523507] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:46:08,366 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:46:08,366 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 12:46:08,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512274874] [2022-03-20 12:46:08,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:46:08,367 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 12:46:08,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:46:08,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 12:46:08,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 12:46:08,368 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) [2022-03-20 12:46:08,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:46:08,475 INFO L93 Difference]: Finished difference Result 107 states and 138 transitions. [2022-03-20 12:46:08,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 12:46:08,475 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 [2022-03-20 12:46:08,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:46:08,478 INFO L225 Difference]: With dead ends: 107 [2022-03-20 12:46:08,478 INFO L226 Difference]: Without dead ends: 69 [2022-03-20 12:46:08,480 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 [2022-03-20 12:46:08,482 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 [2022-03-20 12:46:08,482 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] [2022-03-20 12:46:08,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-03-20 12:46:08,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 48. [2022-03-20 12:46:08,496 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) [2022-03-20 12:46:08,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 58 transitions. [2022-03-20 12:46:08,497 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 58 transitions. Word has length 13 [2022-03-20 12:46:08,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:46:08,497 INFO L478 AbstractCegarLoop]: Abstraction has 48 states and 58 transitions. [2022-03-20 12:46:08,497 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) [2022-03-20 12:46:08,498 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 58 transitions. [2022-03-20 12:46:08,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-20 12:46:08,498 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:46:08,499 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] [2022-03-20 12:46:08,499 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-20 12:46:08,499 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:46:08,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:46:08,500 INFO L85 PathProgramCache]: Analyzing trace with hash 556660632, now seen corresponding path program 1 times [2022-03-20 12:46:08,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:46:08,503 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1270133804] [2022-03-20 12:46:08,518 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:46:08,518 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:46:08,518 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:46:08,519 INFO L85 PathProgramCache]: Analyzing trace with hash 556660632, now seen corresponding path program 2 times [2022-03-20 12:46:08,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:46:08,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175346889] [2022-03-20 12:46:08,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:46:08,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:46:08,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:46:08,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:46:08,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:46:08,622 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-20 12:46:08,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:46:08,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175346889] [2022-03-20 12:46:08,623 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175346889] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:46:08,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239198704] [2022-03-20 12:46:08,623 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 12:46:08,624 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:46:08,624 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:46:08,626 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) [2022-03-20 12:46:08,666 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-20 12:46:08,743 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 12:46:08,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:46:08,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 3 conjunts are in the unsatisfiable core [2022-03-20 12:46:08,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:46:08,816 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-20 12:46:08,816 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:46:08,882 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-20 12:46:08,882 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1239198704] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:46:08,882 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:46:08,883 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-03-20 12:46:08,883 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:46:08,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1270133804] [2022-03-20 12:46:08,883 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1270133804] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:46:08,884 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:46:08,884 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 12:46:08,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087347051] [2022-03-20 12:46:08,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:46:08,884 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 12:46:08,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:46:08,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 12:46:08,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-03-20 12:46:08,886 INFO L87 Difference]: Start difference. First operand 48 states and 58 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 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) [2022-03-20 12:46:09,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:46:09,143 INFO L93 Difference]: Finished difference Result 131 states and 172 transitions. [2022-03-20 12:46:09,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 12:46:09,144 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 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 20 [2022-03-20 12:46:09,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:46:09,147 INFO L225 Difference]: With dead ends: 131 [2022-03-20 12:46:09,148 INFO L226 Difference]: Without dead ends: 92 [2022-03-20 12:46:09,150 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-03-20 12:46:09,150 INFO L913 BasicCegarLoop]: 46 mSDtfsCounter, 126 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 12:46:09,151 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 58 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 12:46:09,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-03-20 12:46:09,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 71. [2022-03-20 12:46:09,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 57 states have (on average 1.3157894736842106) internal successors, (75), 57 states have internal predecessors, (75), 9 states have call successors, (9), 6 states have call predecessors, (9), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-20 12:46:09,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 91 transitions. [2022-03-20 12:46:09,171 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 91 transitions. Word has length 20 [2022-03-20 12:46:09,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:46:09,172 INFO L478 AbstractCegarLoop]: Abstraction has 71 states and 91 transitions. [2022-03-20 12:46:09,172 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 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) [2022-03-20 12:46:09,172 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 91 transitions. [2022-03-20 12:46:09,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-20 12:46:09,173 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:46:09,173 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:46:09,197 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-03-20 12:46:09,391 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 [2022-03-20 12:46:09,391 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:46:09,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:46:09,392 INFO L85 PathProgramCache]: Analyzing trace with hash -2023168326, now seen corresponding path program 3 times [2022-03-20 12:46:09,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:46:09,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [169680572] [2022-03-20 12:46:09,394 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:46:09,394 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:46:09,394 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:46:09,394 INFO L85 PathProgramCache]: Analyzing trace with hash -2023168326, now seen corresponding path program 4 times [2022-03-20 12:46:09,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:46:09,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309087214] [2022-03-20 12:46:09,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:46:09,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:46:09,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:46:09,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:46:09,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:46:09,485 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 12:46:09,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:46:09,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309087214] [2022-03-20 12:46:09,485 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309087214] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:46:09,485 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:46:09,485 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 12:46:09,486 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:46:09,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [169680572] [2022-03-20 12:46:09,487 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [169680572] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:46:09,487 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:46:09,487 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 12:46:09,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390343019] [2022-03-20 12:46:09,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:46:09,488 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 12:46:09,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:46:09,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 12:46:09,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-20 12:46:09,488 INFO L87 Difference]: Start difference. First operand 71 states and 91 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) [2022-03-20 12:46:09,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:46:09,643 INFO L93 Difference]: Finished difference Result 116 states and 156 transitions. [2022-03-20 12:46:09,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 12:46:09,643 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 27 [2022-03-20 12:46:09,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:46:09,646 INFO L225 Difference]: With dead ends: 116 [2022-03-20 12:46:09,646 INFO L226 Difference]: Without dead ends: 111 [2022-03-20 12:46:09,647 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 [2022-03-20 12:46:09,651 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 [2022-03-20 12:46:09,651 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] [2022-03-20 12:46:09,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-03-20 12:46:09,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 72. [2022-03-20 12:46:09,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 58 states have (on average 1.3275862068965518) internal successors, (77), 58 states have internal predecessors, (77), 9 states have call successors, (9), 6 states have call predecessors, (9), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-20 12:46:09,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 93 transitions. [2022-03-20 12:46:09,667 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 93 transitions. Word has length 27 [2022-03-20 12:46:09,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:46:09,668 INFO L478 AbstractCegarLoop]: Abstraction has 72 states and 93 transitions. [2022-03-20 12:46:09,668 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) [2022-03-20 12:46:09,668 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 93 transitions. [2022-03-20 12:46:09,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-20 12:46:09,669 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:46:09,669 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:46:09,669 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-03-20 12:46:09,669 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:46:09,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:46:09,670 INFO L85 PathProgramCache]: Analyzing trace with hash -1646969817, now seen corresponding path program 1 times [2022-03-20 12:46:09,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:46:09,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [801446886] [2022-03-20 12:46:09,672 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:46:09,672 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:46:09,672 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:46:09,672 INFO L85 PathProgramCache]: Analyzing trace with hash -1646969817, now seen corresponding path program 2 times [2022-03-20 12:46:09,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:46:09,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636092187] [2022-03-20 12:46:09,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:46:09,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:46:09,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:46:09,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:46:09,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:46:09,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-03-20 12:46:09,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:46:09,789 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-03-20 12:46:09,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:46:09,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636092187] [2022-03-20 12:46:09,789 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636092187] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:46:09,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943844915] [2022-03-20 12:46:09,789 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 12:46:09,789 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:46:09,790 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:46:09,804 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) [2022-03-20 12:46:09,826 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-20 12:46:09,921 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 12:46:09,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:46:09,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-20 12:46:09,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:46:09,980 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-03-20 12:46:09,981 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:46:10,051 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-03-20 12:46:10,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [943844915] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:46:10,051 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:46:10,052 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 11 [2022-03-20 12:46:10,052 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:46:10,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [801446886] [2022-03-20 12:46:10,052 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [801446886] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:46:10,052 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:46:10,052 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-20 12:46:10,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855012338] [2022-03-20 12:46:10,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:46:10,052 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-20 12:46:10,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:46:10,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-20 12:46:10,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-03-20 12:46:10,053 INFO L87 Difference]: Start difference. First operand 72 states and 93 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 12:46:10,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:46:10,255 INFO L93 Difference]: Finished difference Result 188 states and 258 transitions. [2022-03-20 12:46:10,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 12:46:10,258 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 36 [2022-03-20 12:46:10,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:46:10,260 INFO L225 Difference]: With dead ends: 188 [2022-03-20 12:46:10,264 INFO L226 Difference]: Without dead ends: 127 [2022-03-20 12:46:10,265 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=87, Invalid=153, Unknown=0, NotChecked=0, Total=240 [2022-03-20 12:46:10,267 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 228 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 12:46:10,267 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [232 Valid, 45 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 12:46:10,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-03-20 12:46:10,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 95. [2022-03-20 12:46:10,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 78 states have (on average 1.3333333333333333) internal successors, (104), 78 states have internal predecessors, (104), 12 states have call successors, (12), 6 states have call predecessors, (12), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-20 12:46:10,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 126 transitions. [2022-03-20 12:46:10,289 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 126 transitions. Word has length 36 [2022-03-20 12:46:10,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:46:10,289 INFO L478 AbstractCegarLoop]: Abstraction has 95 states and 126 transitions. [2022-03-20 12:46:10,290 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 12:46:10,290 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 126 transitions. [2022-03-20 12:46:10,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-03-20 12:46:10,290 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:46:10,291 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:46:10,309 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-03-20 12:46:10,508 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 [2022-03-20 12:46:10,509 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:46:10,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:46:10,510 INFO L85 PathProgramCache]: Analyzing trace with hash 1502656581, now seen corresponding path program 3 times [2022-03-20 12:46:10,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:46:10,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1064263182] [2022-03-20 12:46:10,511 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:46:10,511 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:46:10,511 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:46:10,511 INFO L85 PathProgramCache]: Analyzing trace with hash 1502656581, now seen corresponding path program 4 times [2022-03-20 12:46:10,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:46:10,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418429399] [2022-03-20 12:46:10,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:46:10,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:46:10,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:46:10,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:46:10,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:46:10,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-03-20 12:46:10,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:46:10,594 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-03-20 12:46:10,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:46:10,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418429399] [2022-03-20 12:46:10,594 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418429399] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:46:10,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754249376] [2022-03-20 12:46:10,595 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 12:46:10,595 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:46:10,595 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:46:10,601 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) [2022-03-20 12:46:10,602 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-20 12:46:10,721 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 12:46:10,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:46:10,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-20 12:46:10,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:46:10,780 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-03-20 12:46:10,781 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:46:10,865 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-03-20 12:46:10,865 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [754249376] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:46:10,865 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:46:10,866 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 13 [2022-03-20 12:46:10,866 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:46:10,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1064263182] [2022-03-20 12:46:10,866 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1064263182] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:46:10,866 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:46:10,866 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 12:46:10,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304815722] [2022-03-20 12:46:10,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:46:10,866 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 12:46:10,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:46:10,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 12:46:10,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2022-03-20 12:46:10,867 INFO L87 Difference]: Start difference. First operand 95 states and 126 transitions. Second operand has 8 states, 8 states have (on average 3.375) internal successors, (27), 6 states have internal predecessors, (27), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 12:46:11,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:46:11,122 INFO L93 Difference]: Finished difference Result 232 states and 323 transitions. [2022-03-20 12:46:11,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-20 12:46:11,122 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 6 states have internal predecessors, (27), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 43 [2022-03-20 12:46:11,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:46:11,124 INFO L225 Difference]: With dead ends: 232 [2022-03-20 12:46:11,124 INFO L226 Difference]: Without dead ends: 150 [2022-03-20 12:46:11,126 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=126, Invalid=216, Unknown=0, NotChecked=0, Total=342 [2022-03-20 12:46:11,126 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 221 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 320 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 400 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 12:46:11,127 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [225 Valid, 49 Invalid, 400 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 320 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 12:46:11,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2022-03-20 12:46:11,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 118. [2022-03-20 12:46:11,146 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) [2022-03-20 12:46:11,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 159 transitions. [2022-03-20 12:46:11,147 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 159 transitions. Word has length 43 [2022-03-20 12:46:11,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:46:11,148 INFO L478 AbstractCegarLoop]: Abstraction has 118 states and 159 transitions. [2022-03-20 12:46:11,148 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 6 states have internal predecessors, (27), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 12:46:11,148 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 159 transitions. [2022-03-20 12:46:11,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-03-20 12:46:11,154 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:46:11,154 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] [2022-03-20 12:46:11,190 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-20 12:46:11,371 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 [2022-03-20 12:46:11,372 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:46:11,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:46:11,372 INFO L85 PathProgramCache]: Analyzing trace with hash 399846123, now seen corresponding path program 5 times [2022-03-20 12:46:11,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:46:11,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [157455350] [2022-03-20 12:46:11,374 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:46:11,374 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:46:11,374 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:46:11,374 INFO L85 PathProgramCache]: Analyzing trace with hash 399846123, now seen corresponding path program 6 times [2022-03-20 12:46:11,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:46:11,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100893748] [2022-03-20 12:46:11,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:46:11,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:46:11,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:46:11,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:46:11,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:46:11,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-03-20 12:46:11,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:46:11,439 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-03-20 12:46:11,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:46:11,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100893748] [2022-03-20 12:46:11,440 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100893748] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:46:11,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529831434] [2022-03-20 12:46:11,440 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 12:46:11,440 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:46:11,440 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:46:11,456 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) [2022-03-20 12:46:11,462 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-20 12:46:11,562 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 12:46:11,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:46:11,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-20 12:46:11,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:46:11,650 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-03-20 12:46:11,650 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:46:11,743 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-03-20 12:46:11,744 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [529831434] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:46:11,744 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:46:11,744 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 15 [2022-03-20 12:46:11,744 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:46:11,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [157455350] [2022-03-20 12:46:11,744 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [157455350] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:46:11,744 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:46:11,744 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 12:46:11,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338261454] [2022-03-20 12:46:11,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:46:11,745 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-20 12:46:11,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:46:11,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-20 12:46:11,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2022-03-20 12:46:11,745 INFO L87 Difference]: Start difference. First operand 118 states and 159 transitions. Second operand has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 7 states have internal predecessors, (29), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 12:46:12,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:46:12,001 INFO L93 Difference]: Finished difference Result 276 states and 388 transitions. [2022-03-20 12:46:12,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-20 12:46:12,002 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 7 states have internal predecessors, (29), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 50 [2022-03-20 12:46:12,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:46:12,003 INFO L225 Difference]: With dead ends: 276 [2022-03-20 12:46:12,003 INFO L226 Difference]: Without dead ends: 173 [2022-03-20 12:46:12,004 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=173, Invalid=289, Unknown=0, NotChecked=0, Total=462 [2022-03-20 12:46:12,004 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 359 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 363 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 399 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 12:46:12,004 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [363 Valid, 45 Invalid, 399 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 277 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 12:46:12,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2022-03-20 12:46:12,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 141. [2022-03-20 12:46:12,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 118 states have (on average 1.3389830508474576) internal successors, (158), 118 states have internal predecessors, (158), 18 states have call successors, (18), 6 states have call predecessors, (18), 4 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-03-20 12:46:12,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 192 transitions. [2022-03-20 12:46:12,018 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 192 transitions. Word has length 50 [2022-03-20 12:46:12,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:46:12,018 INFO L478 AbstractCegarLoop]: Abstraction has 141 states and 192 transitions. [2022-03-20 12:46:12,018 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 7 states have internal predecessors, (29), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 12:46:12,019 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 192 transitions. [2022-03-20 12:46:12,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-03-20 12:46:12,019 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:46:12,019 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:46:12,048 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-20 12:46:12,236 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 [2022-03-20 12:46:12,237 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:46:12,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:46:12,237 INFO L85 PathProgramCache]: Analyzing trace with hash -246769791, now seen corresponding path program 7 times [2022-03-20 12:46:12,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:46:12,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [677378060] [2022-03-20 12:46:12,239 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:46:12,239 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:46:12,239 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:46:12,239 INFO L85 PathProgramCache]: Analyzing trace with hash -246769791, now seen corresponding path program 8 times [2022-03-20 12:46:12,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:46:12,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317912009] [2022-03-20 12:46:12,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:46:12,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:46:12,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:46:12,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:46:12,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:46:12,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-03-20 12:46:12,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:46:12,332 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-03-20 12:46:12,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:46:12,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317912009] [2022-03-20 12:46:12,332 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317912009] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:46:12,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398442741] [2022-03-20 12:46:12,333 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 12:46:12,333 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:46:12,333 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:46:12,349 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) [2022-03-20 12:46:12,350 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-20 12:46:12,423 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 12:46:12,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:46:12,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 12:46:12,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:46:12,495 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-03-20 12:46:12,495 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:46:12,616 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-03-20 12:46:12,617 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [398442741] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:46:12,617 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:46:12,617 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 17 [2022-03-20 12:46:12,617 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:46:12,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [677378060] [2022-03-20 12:46:12,617 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [677378060] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:46:12,617 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:46:12,617 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-20 12:46:12,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688357505] [2022-03-20 12:46:12,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:46:12,619 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 12:46:12,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:46:12,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 12:46:12,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=163, Unknown=0, NotChecked=0, Total=272 [2022-03-20 12:46:12,619 INFO L87 Difference]: Start difference. First operand 141 states and 192 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 8 states have internal predecessors, (31), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 12:46:12,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:46:12,979 INFO L93 Difference]: Finished difference Result 320 states and 453 transitions. [2022-03-20 12:46:12,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-20 12:46:12,979 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 8 states have internal predecessors, (31), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 57 [2022-03-20 12:46:12,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:46:12,980 INFO L225 Difference]: With dead ends: 320 [2022-03-20 12:46:12,980 INFO L226 Difference]: Without dead ends: 196 [2022-03-20 12:46:12,981 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=228, Invalid=372, Unknown=0, NotChecked=0, Total=600 [2022-03-20 12:46:12,981 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 375 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 350 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 379 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 491 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 350 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 12:46:12,981 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [379 Valid, 45 Invalid, 491 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 350 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 12:46:12,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2022-03-20 12:46:12,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 164. [2022-03-20 12:46:12,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 138 states have (on average 1.3405797101449275) internal successors, (185), 138 states have internal predecessors, (185), 21 states have call successors, (21), 6 states have call predecessors, (21), 4 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2022-03-20 12:46:12,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 225 transitions. [2022-03-20 12:46:12,996 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 225 transitions. Word has length 57 [2022-03-20 12:46:12,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:46:12,996 INFO L478 AbstractCegarLoop]: Abstraction has 164 states and 225 transitions. [2022-03-20 12:46:12,996 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 8 states have internal predecessors, (31), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 12:46:12,996 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 225 transitions. [2022-03-20 12:46:12,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-03-20 12:46:12,997 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:46:12,997 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:46:13,015 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-20 12:46:13,205 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 [2022-03-20 12:46:13,206 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:46:13,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:46:13,206 INFO L85 PathProgramCache]: Analyzing trace with hash -268874321, now seen corresponding path program 9 times [2022-03-20 12:46:13,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:46:13,207 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1958910666] [2022-03-20 12:46:13,222 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:46:13,222 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:46:13,222 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:46:13,222 INFO L85 PathProgramCache]: Analyzing trace with hash -268874321, now seen corresponding path program 10 times [2022-03-20 12:46:13,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:46:13,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129933199] [2022-03-20 12:46:13,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:46:13,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:46:13,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:46:13,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:46:13,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:46:13,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-03-20 12:46:13,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:46:13,348 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2022-03-20 12:46:13,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:46:13,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129933199] [2022-03-20 12:46:13,348 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129933199] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:46:13,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852571283] [2022-03-20 12:46:13,349 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 12:46:13,349 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:46:13,349 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:46:13,363 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) [2022-03-20 12:46:13,364 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-20 12:46:13,444 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 12:46:13,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:46:13,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-20 12:46:13,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:46:13,527 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2022-03-20 12:46:13,527 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:46:13,673 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2022-03-20 12:46:13,674 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1852571283] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:46:13,674 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:46:13,674 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 19 [2022-03-20 12:46:13,674 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:46:13,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1958910666] [2022-03-20 12:46:13,674 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1958910666] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:46:13,674 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:46:13,674 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-20 12:46:13,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919775569] [2022-03-20 12:46:13,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:46:13,675 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-20 12:46:13,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:46:13,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-20 12:46:13,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=202, Unknown=0, NotChecked=0, Total=342 [2022-03-20 12:46:13,675 INFO L87 Difference]: Start difference. First operand 164 states and 225 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 9 states have internal predecessors, (33), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 12:46:14,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:46:14,036 INFO L93 Difference]: Finished difference Result 364 states and 518 transitions. [2022-03-20 12:46:14,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-20 12:46:14,037 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 9 states have internal predecessors, (33), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 64 [2022-03-20 12:46:14,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:46:14,038 INFO L225 Difference]: With dead ends: 364 [2022-03-20 12:46:14,038 INFO L226 Difference]: Without dead ends: 219 [2022-03-20 12:46:14,038 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=291, Invalid=465, Unknown=0, NotChecked=0, Total=756 [2022-03-20 12:46:14,039 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 392 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 466 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 396 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 611 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 466 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 12:46:14,039 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [396 Valid, 49 Invalid, 611 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 466 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 12:46:14,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2022-03-20 12:46:14,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 187. [2022-03-20 12:46:14,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 158 states have (on average 1.3417721518987342) internal successors, (212), 158 states have internal predecessors, (212), 24 states have call successors, (24), 6 states have call predecessors, (24), 4 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-03-20 12:46:14,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 258 transitions. [2022-03-20 12:46:14,055 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 258 transitions. Word has length 64 [2022-03-20 12:46:14,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:46:14,055 INFO L478 AbstractCegarLoop]: Abstraction has 187 states and 258 transitions. [2022-03-20 12:46:14,055 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 9 states have internal predecessors, (33), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 12:46:14,055 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 258 transitions. [2022-03-20 12:46:14,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-03-20 12:46:14,056 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:46:14,056 INFO L499 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:46:14,074 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-20 12:46:14,272 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 [2022-03-20 12:46:14,273 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:46:14,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:46:14,273 INFO L85 PathProgramCache]: Analyzing trace with hash -150953283, now seen corresponding path program 11 times [2022-03-20 12:46:14,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:46:14,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1371964460] [2022-03-20 12:46:14,274 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:46:14,274 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:46:14,274 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:46:14,275 INFO L85 PathProgramCache]: Analyzing trace with hash -150953283, now seen corresponding path program 12 times [2022-03-20 12:46:14,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:46:14,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726259257] [2022-03-20 12:46:14,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:46:14,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:46:14,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:46:14,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:46:14,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:46:14,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-03-20 12:46:14,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:46:14,369 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2022-03-20 12:46:14,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:46:14,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726259257] [2022-03-20 12:46:14,369 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726259257] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:46:14,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067884752] [2022-03-20 12:46:14,369 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 12:46:14,369 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:46:14,369 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:46:14,370 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) [2022-03-20 12:46:14,371 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-20 12:46:14,454 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 12:46:14,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:46:14,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 12:46:14,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:46:14,611 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 25 proven. 1 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2022-03-20 12:46:14,611 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:46:14,798 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 25 proven. 1 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2022-03-20 12:46:14,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1067884752] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:46:14,799 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:46:14,799 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 7, 7] total 20 [2022-03-20 12:46:14,799 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:46:14,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1371964460] [2022-03-20 12:46:14,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1371964460] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:46:14,799 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:46:14,799 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-20 12:46:14,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473830065] [2022-03-20 12:46:14,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:46:14,799 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-20 12:46:14,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:46:14,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-20 12:46:14,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2022-03-20 12:46:14,800 INFO L87 Difference]: Start difference. First operand 187 states and 258 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 10 states have internal predecessors, (35), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 12:46:15,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:46:15,234 INFO L93 Difference]: Finished difference Result 408 states and 583 transitions. [2022-03-20 12:46:15,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-20 12:46:15,235 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 10 states have internal predecessors, (35), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 71 [2022-03-20 12:46:15,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:46:15,236 INFO L225 Difference]: With dead ends: 408 [2022-03-20 12:46:15,236 INFO L226 Difference]: Without dead ends: 242 [2022-03-20 12:46:15,237 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 137 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=187, Invalid=683, Unknown=0, NotChecked=0, Total=870 [2022-03-20 12:46:15,237 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 554 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 451 mSolverCounterSat, 184 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 558 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 635 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 184 IncrementalHoareTripleChecker+Valid, 451 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 12:46:15,237 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [558 Valid, 49 Invalid, 635 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [184 Valid, 451 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 12:46:15,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2022-03-20 12:46:15,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 210. [2022-03-20 12:46:15,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 178 states have (on average 1.3426966292134832) internal successors, (239), 178 states have internal predecessors, (239), 27 states have call successors, (27), 6 states have call predecessors, (27), 4 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2022-03-20 12:46:15,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 291 transitions. [2022-03-20 12:46:15,262 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 291 transitions. Word has length 71 [2022-03-20 12:46:15,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:46:15,262 INFO L478 AbstractCegarLoop]: Abstraction has 210 states and 291 transitions. [2022-03-20 12:46:15,262 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 10 states have internal predecessors, (35), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 12:46:15,263 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 291 transitions. [2022-03-20 12:46:15,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-03-20 12:46:15,263 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:46:15,263 INFO L499 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:46:15,295 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-20 12:46:15,498 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 [2022-03-20 12:46:15,498 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:46:15,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:46:15,499 INFO L85 PathProgramCache]: Analyzing trace with hash -1180638093, now seen corresponding path program 13 times [2022-03-20 12:46:15,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:46:15,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1590621243] [2022-03-20 12:46:15,500 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:46:15,500 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:46:15,500 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:46:15,500 INFO L85 PathProgramCache]: Analyzing trace with hash -1180638093, now seen corresponding path program 14 times [2022-03-20 12:46:15,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:46:15,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427728639] [2022-03-20 12:46:15,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:46:15,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:46:15,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:46:15,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:46:15,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:46:15,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-03-20 12:46:15,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:46:15,581 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2022-03-20 12:46:15,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:46:15,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427728639] [2022-03-20 12:46:15,581 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427728639] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:46:15,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068541308] [2022-03-20 12:46:15,581 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 12:46:15,581 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:46:15,581 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:46:15,582 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) [2022-03-20 12:46:15,583 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-20 12:46:15,670 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 12:46:15,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:46:15,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-20 12:46:15,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:46:15,791 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2022-03-20 12:46:15,791 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:46:15,974 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2022-03-20 12:46:15,975 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2068541308] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:46:15,975 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:46:15,975 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 11] total 23 [2022-03-20 12:46:15,975 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:46:15,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1590621243] [2022-03-20 12:46:15,975 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1590621243] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:46:15,975 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:46:15,975 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-20 12:46:15,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054525720] [2022-03-20 12:46:15,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:46:15,976 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-20 12:46:15,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:46:15,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-20 12:46:15,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=292, Unknown=0, NotChecked=0, Total=506 [2022-03-20 12:46:15,976 INFO L87 Difference]: Start difference. First operand 210 states and 291 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 11 states have internal predecessors, (37), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 12:46:16,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:46:16,434 INFO L93 Difference]: Finished difference Result 452 states and 648 transitions. [2022-03-20 12:46:16,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-20 12:46:16,434 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 11 states have internal predecessors, (37), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 78 [2022-03-20 12:46:16,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:46:16,436 INFO L225 Difference]: With dead ends: 452 [2022-03-20 12:46:16,436 INFO L226 Difference]: Without dead ends: 265 [2022-03-20 12:46:16,437 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=441, Invalid=681, Unknown=0, NotChecked=0, Total=1122 [2022-03-20 12:46:16,437 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 515 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 543 mSolverCounterSat, 182 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 519 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 725 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 182 IncrementalHoareTripleChecker+Valid, 543 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 12:46:16,437 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [519 Valid, 51 Invalid, 725 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [182 Valid, 543 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 12:46:16,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2022-03-20 12:46:16,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 233. [2022-03-20 12:46:16,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 198 states have (on average 1.3434343434343434) internal successors, (266), 198 states have internal predecessors, (266), 30 states have call successors, (30), 6 states have call predecessors, (30), 4 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2022-03-20 12:46:16,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 324 transitions. [2022-03-20 12:46:16,461 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 324 transitions. Word has length 78 [2022-03-20 12:46:16,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:46:16,461 INFO L478 AbstractCegarLoop]: Abstraction has 233 states and 324 transitions. [2022-03-20 12:46:16,461 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 11 states have internal predecessors, (37), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 12:46:16,461 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 324 transitions. [2022-03-20 12:46:16,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-03-20 12:46:16,462 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:46:16,462 INFO L499 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:46:16,481 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-20 12:46:16,679 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 [2022-03-20 12:46:16,679 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:46:16,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:46:16,680 INFO L85 PathProgramCache]: Analyzing trace with hash -1953261063, now seen corresponding path program 15 times [2022-03-20 12:46:16,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:46:16,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1075243748] [2022-03-20 12:46:16,681 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:46:16,681 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:46:16,681 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:46:16,681 INFO L85 PathProgramCache]: Analyzing trace with hash -1953261063, now seen corresponding path program 16 times [2022-03-20 12:46:16,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:46:16,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870105955] [2022-03-20 12:46:16,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:46:16,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:46:16,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:46:16,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:46:16,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:46:16,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-03-20 12:46:16,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:46:16,792 INFO L134 CoverageAnalysis]: Checked inductivity of 279 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2022-03-20 12:46:16,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:46:16,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870105955] [2022-03-20 12:46:16,793 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870105955] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:46:16,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156445073] [2022-03-20 12:46:16,793 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 12:46:16,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:46:16,793 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:46:16,794 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) [2022-03-20 12:46:16,810 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-20 12:46:16,914 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 12:46:16,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:46:16,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-20 12:46:16,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:46:17,020 INFO L134 CoverageAnalysis]: Checked inductivity of 279 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2022-03-20 12:46:17,021 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:46:17,294 INFO L134 CoverageAnalysis]: Checked inductivity of 279 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2022-03-20 12:46:17,294 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1156445073] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:46:17,295 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:46:17,295 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 25 [2022-03-20 12:46:17,295 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:46:17,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1075243748] [2022-03-20 12:46:17,295 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1075243748] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:46:17,295 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:46:17,295 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-20 12:46:17,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78675520] [2022-03-20 12:46:17,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:46:17,295 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-20 12:46:17,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:46:17,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-20 12:46:17,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=343, Unknown=0, NotChecked=0, Total=600 [2022-03-20 12:46:17,296 INFO L87 Difference]: Start difference. First operand 233 states and 324 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 12 states have internal predecessors, (39), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 12:46:17,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:46:17,853 INFO L93 Difference]: Finished difference Result 496 states and 713 transitions. [2022-03-20 12:46:17,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-20 12:46:17,854 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 12 states have internal predecessors, (39), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 85 [2022-03-20 12:46:17,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:46:17,855 INFO L225 Difference]: With dead ends: 496 [2022-03-20 12:46:17,855 INFO L226 Difference]: Without dead ends: 288 [2022-03-20 12:46:17,856 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=528, Invalid=804, Unknown=0, NotChecked=0, Total=1332 [2022-03-20 12:46:17,856 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 444 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 849 mSolverCounterSat, 166 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 448 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 1015 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 849 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 12:46:17,856 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [448 Valid, 59 Invalid, 1015 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [166 Valid, 849 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 12:46:17,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2022-03-20 12:46:17,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 256. [2022-03-20 12:46:17,881 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) [2022-03-20 12:46:17,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 357 transitions. [2022-03-20 12:46:17,882 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 357 transitions. Word has length 85 [2022-03-20 12:46:17,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:46:17,882 INFO L478 AbstractCegarLoop]: Abstraction has 256 states and 357 transitions. [2022-03-20 12:46:17,883 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 12 states have internal predecessors, (39), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 12:46:17,883 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 357 transitions. [2022-03-20 12:46:17,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-03-20 12:46:17,883 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:46:17,884 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] [2022-03-20 12:46:17,901 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-20 12:46:18,100 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:46:18,100 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:46:18,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:46:18,101 INFO L85 PathProgramCache]: Analyzing trace with hash 1219178295, now seen corresponding path program 17 times [2022-03-20 12:46:18,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:46:18,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [691217230] [2022-03-20 12:46:18,102 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:46:18,102 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:46:18,102 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:46:18,102 INFO L85 PathProgramCache]: Analyzing trace with hash 1219178295, now seen corresponding path program 18 times [2022-03-20 12:46:18,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:46:18,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183454444] [2022-03-20 12:46:18,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:46:18,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:46:18,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:46:18,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:46:18,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:46:18,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2022-03-20 12:46:18,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:46:18,254 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2022-03-20 12:46:18,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:46:18,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183454444] [2022-03-20 12:46:18,254 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183454444] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:46:18,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702317200] [2022-03-20 12:46:18,255 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 12:46:18,255 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:46:18,255 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:46:18,256 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 12:46:18,260 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-20 12:46:18,381 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 12:46:18,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:46:18,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 12:46:18,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:46:18,554 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 37 proven. 1 refuted. 0 times theorem prover too weak. 307 trivial. 0 not checked. [2022-03-20 12:46:18,554 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:46:18,737 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 37 proven. 1 refuted. 0 times theorem prover too weak. 307 trivial. 0 not checked. [2022-03-20 12:46:18,737 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1702317200] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:46:18,737 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:46:18,737 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 7, 7] total 23 [2022-03-20 12:46:18,737 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:46:18,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [691217230] [2022-03-20 12:46:18,738 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [691217230] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:46:18,738 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:46:18,738 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-20 12:46:18,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379151653] [2022-03-20 12:46:18,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:46:18,738 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-20 12:46:18,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:46:18,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-20 12:46:18,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=399, Unknown=0, NotChecked=0, Total=506 [2022-03-20 12:46:18,739 INFO L87 Difference]: Start difference. First operand 256 states and 357 transitions. Second operand has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 13 states have internal predecessors, (41), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 12:46:19,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:46:19,322 INFO L93 Difference]: Finished difference Result 540 states and 778 transitions. [2022-03-20 12:46:19,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-20 12:46:19,323 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 13 states have internal predecessors, (41), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 92 [2022-03-20 12:46:19,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:46:19,324 INFO L225 Difference]: With dead ends: 540 [2022-03-20 12:46:19,324 INFO L226 Difference]: Without dead ends: 311 [2022-03-20 12:46:19,325 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 179 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=292, Invalid=968, Unknown=0, NotChecked=0, Total=1260 [2022-03-20 12:46:19,326 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 619 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 633 mSolverCounterSat, 245 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 623 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 878 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 245 IncrementalHoareTripleChecker+Valid, 633 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 12:46:19,326 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [623 Valid, 47 Invalid, 878 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [245 Valid, 633 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 12:46:19,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2022-03-20 12:46:19,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 279. [2022-03-20 12:46:19,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 238 states have (on average 1.3445378151260505) internal successors, (320), 238 states have internal predecessors, (320), 36 states have call successors, (36), 6 states have call predecessors, (36), 4 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2022-03-20 12:46:19,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 390 transitions. [2022-03-20 12:46:19,357 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 390 transitions. Word has length 92 [2022-03-20 12:46:19,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:46:19,357 INFO L478 AbstractCegarLoop]: Abstraction has 279 states and 390 transitions. [2022-03-20 12:46:19,357 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 13 states have internal predecessors, (41), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 12:46:19,357 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 390 transitions. [2022-03-20 12:46:19,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-03-20 12:46:19,358 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:46:19,358 INFO L499 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:46:19,385 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-20 12:46:19,575 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-03-20 12:46:19,575 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:46:19,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:46:19,576 INFO L85 PathProgramCache]: Analyzing trace with hash -1117504203, now seen corresponding path program 19 times [2022-03-20 12:46:19,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:46:19,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [837061789] [2022-03-20 12:46:19,577 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:46:19,577 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:46:19,578 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:46:19,578 INFO L85 PathProgramCache]: Analyzing trace with hash -1117504203, now seen corresponding path program 20 times [2022-03-20 12:46:19,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:46:19,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4788559] [2022-03-20 12:46:19,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:46:19,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:46:19,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:46:19,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:46:19,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:46:19,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-03-20 12:46:19,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:46:19,723 INFO L134 CoverageAnalysis]: Checked inductivity of 418 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 297 trivial. 0 not checked. [2022-03-20 12:46:19,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:46:19,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4788559] [2022-03-20 12:46:19,723 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4788559] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:46:19,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524564739] [2022-03-20 12:46:19,723 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 12:46:19,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:46:19,724 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:46:19,724 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 12:46:19,726 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-20 12:46:19,837 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 12:46:19,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:46:19,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-20 12:46:19,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:46:19,987 INFO L134 CoverageAnalysis]: Checked inductivity of 418 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 297 trivial. 0 not checked. [2022-03-20 12:46:19,987 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:46:20,308 INFO L134 CoverageAnalysis]: Checked inductivity of 418 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 297 trivial. 0 not checked. [2022-03-20 12:46:20,309 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1524564739] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:46:20,309 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:46:20,309 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 29 [2022-03-20 12:46:20,309 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:46:20,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [837061789] [2022-03-20 12:46:20,309 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [837061789] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:46:20,309 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:46:20,309 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-20 12:46:20,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649705058] [2022-03-20 12:46:20,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:46:20,310 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-20 12:46:20,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:46:20,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-20 12:46:20,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=355, Invalid=457, Unknown=0, NotChecked=0, Total=812 [2022-03-20 12:46:20,312 INFO L87 Difference]: Start difference. First operand 279 states and 390 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 14 states have internal predecessors, (43), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 12:46:20,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:46:20,972 INFO L93 Difference]: Finished difference Result 584 states and 843 transitions. [2022-03-20 12:46:20,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-20 12:46:20,972 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 14 states have internal predecessors, (43), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 99 [2022-03-20 12:46:20,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:46:20,974 INFO L225 Difference]: With dead ends: 584 [2022-03-20 12:46:20,974 INFO L226 Difference]: Without dead ends: 334 [2022-03-20 12:46:20,976 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=726, Invalid=1080, Unknown=0, NotChecked=0, Total=1806 [2022-03-20 12:46:20,976 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 801 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 643 mSolverCounterSat, 282 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 805 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 925 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 282 IncrementalHoareTripleChecker+Valid, 643 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 12:46:20,976 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [805 Valid, 49 Invalid, 925 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [282 Valid, 643 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 12:46:20,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2022-03-20 12:46:21,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 302. [2022-03-20 12:46:21,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 258 states have (on average 1.3449612403100775) internal successors, (347), 258 states have internal predecessors, (347), 39 states have call successors, (39), 6 states have call predecessors, (39), 4 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) [2022-03-20 12:46:21,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 423 transitions. [2022-03-20 12:46:21,036 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 423 transitions. Word has length 99 [2022-03-20 12:46:21,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:46:21,036 INFO L478 AbstractCegarLoop]: Abstraction has 302 states and 423 transitions. [2022-03-20 12:46:21,036 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 14 states have internal predecessors, (43), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 12:46:21,037 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 423 transitions. [2022-03-20 12:46:21,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-03-20 12:46:21,038 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:46:21,038 INFO L499 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:46:21,057 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-20 12:46:21,255 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-03-20 12:46:21,255 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:46:21,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:46:21,256 INFO L85 PathProgramCache]: Analyzing trace with hash 1433890299, now seen corresponding path program 21 times [2022-03-20 12:46:21,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:46:21,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [931182926] [2022-03-20 12:46:21,257 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:46:21,257 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:46:21,257 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:46:21,257 INFO L85 PathProgramCache]: Analyzing trace with hash 1433890299, now seen corresponding path program 22 times [2022-03-20 12:46:21,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:46:21,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301143599] [2022-03-20 12:46:21,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:46:21,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:46:21,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:46:21,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:46:21,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:46:21,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-03-20 12:46:21,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:46:21,410 INFO L134 CoverageAnalysis]: Checked inductivity of 498 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 354 trivial. 0 not checked. [2022-03-20 12:46:21,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:46:21,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301143599] [2022-03-20 12:46:21,410 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301143599] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:46:21,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044971588] [2022-03-20 12:46:21,410 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 12:46:21,410 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:46:21,410 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:46:21,411 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 12:46:21,412 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-20 12:46:21,516 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 12:46:21,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:46:21,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 422 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-20 12:46:21,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:46:21,665 INFO L134 CoverageAnalysis]: Checked inductivity of 498 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 354 trivial. 0 not checked. [2022-03-20 12:46:21,665 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:46:22,021 INFO L134 CoverageAnalysis]: Checked inductivity of 498 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 354 trivial. 0 not checked. [2022-03-20 12:46:22,021 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1044971588] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:46:22,021 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:46:22,021 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15, 15] total 31 [2022-03-20 12:46:22,023 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:46:22,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [931182926] [2022-03-20 12:46:22,023 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [931182926] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:46:22,023 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:46:22,023 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-03-20 12:46:22,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848564391] [2022-03-20 12:46:22,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:46:22,024 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-20 12:46:22,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:46:22,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-20 12:46:22,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=410, Invalid=520, Unknown=0, NotChecked=0, Total=930 [2022-03-20 12:46:22,025 INFO L87 Difference]: Start difference. First operand 302 states and 423 transitions. Second operand has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 15 states have internal predecessors, (45), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 12:46:22,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:46:22,770 INFO L93 Difference]: Finished difference Result 628 states and 908 transitions. [2022-03-20 12:46:22,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-20 12:46:22,770 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 15 states have internal predecessors, (45), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 106 [2022-03-20 12:46:22,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:46:22,772 INFO L225 Difference]: With dead ends: 628 [2022-03-20 12:46:22,772 INFO L226 Difference]: Without dead ends: 357 [2022-03-20 12:46:22,773 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=837, Invalid=1233, Unknown=0, NotChecked=0, Total=2070 [2022-03-20 12:46:22,774 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 644 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 865 mSolverCounterSat, 276 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 648 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 1141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 276 IncrementalHoareTripleChecker+Valid, 865 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 12:46:22,774 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [648 Valid, 49 Invalid, 1141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [276 Valid, 865 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 12:46:22,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2022-03-20 12:46:22,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 325. [2022-03-20 12:46:22,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 278 states have (on average 1.3453237410071943) internal successors, (374), 278 states have internal predecessors, (374), 42 states have call successors, (42), 6 states have call predecessors, (42), 4 states have return successors, (40), 40 states have call predecessors, (40), 40 states have call successors, (40) [2022-03-20 12:46:22,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 456 transitions. [2022-03-20 12:46:22,825 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 456 transitions. Word has length 106 [2022-03-20 12:46:22,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:46:22,825 INFO L478 AbstractCegarLoop]: Abstraction has 325 states and 456 transitions. [2022-03-20 12:46:22,825 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 15 states have internal predecessors, (45), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 12:46:22,825 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 456 transitions. [2022-03-20 12:46:22,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-03-20 12:46:22,826 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:46:22,826 INFO L499 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:46:22,845 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-03-20 12:46:23,046 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-03-20 12:46:23,046 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:46:23,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:46:23,046 INFO L85 PathProgramCache]: Analyzing trace with hash -464302991, now seen corresponding path program 23 times [2022-03-20 12:46:23,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:46:23,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1065585104] [2022-03-20 12:46:23,047 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:46:23,048 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:46:23,048 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:46:23,048 INFO L85 PathProgramCache]: Analyzing trace with hash -464302991, now seen corresponding path program 24 times [2022-03-20 12:46:23,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:46:23,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222721875] [2022-03-20 12:46:23,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:46:23,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:46:23,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:46:23,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:46:23,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:46:23,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-03-20 12:46:23,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:46:23,176 INFO L134 CoverageAnalysis]: Checked inductivity of 585 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 416 trivial. 0 not checked. [2022-03-20 12:46:23,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:46:23,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222721875] [2022-03-20 12:46:23,176 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222721875] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:46:23,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227991631] [2022-03-20 12:46:23,176 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 12:46:23,176 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:46:23,176 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:46:23,177 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 12:46:23,178 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-20 12:46:23,273 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 12:46:23,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:46:23,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 12:46:23,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:46:23,426 INFO L134 CoverageAnalysis]: Checked inductivity of 585 backedges. 49 proven. 1 refuted. 0 times theorem prover too weak. 535 trivial. 0 not checked. [2022-03-20 12:46:23,426 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:46:23,622 INFO L134 CoverageAnalysis]: Checked inductivity of 585 backedges. 49 proven. 1 refuted. 0 times theorem prover too weak. 535 trivial. 0 not checked. [2022-03-20 12:46:23,622 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1227991631] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:46:23,622 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:46:23,622 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 7, 7] total 26 [2022-03-20 12:46:23,623 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:46:23,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1065585104] [2022-03-20 12:46:23,623 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1065585104] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:46:23,623 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:46:23,623 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-03-20 12:46:23,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698794980] [2022-03-20 12:46:23,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:46:23,623 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-20 12:46:23,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:46:23,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-20 12:46:23,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=501, Unknown=0, NotChecked=0, Total=650 [2022-03-20 12:46:23,624 INFO L87 Difference]: Start difference. First operand 325 states and 456 transitions. Second operand has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 16 states have internal predecessors, (47), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 12:46:24,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:46:24,516 INFO L93 Difference]: Finished difference Result 672 states and 973 transitions. [2022-03-20 12:46:24,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-20 12:46:24,517 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 16 states have internal predecessors, (47), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 113 [2022-03-20 12:46:24,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:46:24,521 INFO L225 Difference]: With dead ends: 672 [2022-03-20 12:46:24,521 INFO L226 Difference]: Without dead ends: 380 [2022-03-20 12:46:24,522 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 221 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=424, Invalid=1298, Unknown=0, NotChecked=0, Total=1722 [2022-03-20 12:46:24,523 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 727 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 834 mSolverCounterSat, 288 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 731 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 1122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 288 IncrementalHoareTripleChecker+Valid, 834 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-20 12:46:24,523 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [731 Valid, 51 Invalid, 1122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [288 Valid, 834 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-20 12:46:24,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2022-03-20 12:46:24,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 348. [2022-03-20 12:46:24,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 298 states have (on average 1.3456375838926173) internal successors, (401), 298 states have internal predecessors, (401), 45 states have call successors, (45), 6 states have call predecessors, (45), 4 states have return successors, (43), 43 states have call predecessors, (43), 43 states have call successors, (43) [2022-03-20 12:46:24,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 489 transitions. [2022-03-20 12:46:24,591 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 489 transitions. Word has length 113 [2022-03-20 12:46:24,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:46:24,592 INFO L478 AbstractCegarLoop]: Abstraction has 348 states and 489 transitions. [2022-03-20 12:46:24,592 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 16 states have internal predecessors, (47), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 12:46:24,592 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 489 transitions. [2022-03-20 12:46:24,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-03-20 12:46:24,595 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:46:24,596 INFO L499 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:46:24,638 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-20 12:46:24,811 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-03-20 12:46:24,812 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:46:24,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:46:24,812 INFO L85 PathProgramCache]: Analyzing trace with hash 551870655, now seen corresponding path program 25 times [2022-03-20 12:46:24,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:46:24,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [616846342] [2022-03-20 12:46:24,813 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:46:24,813 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:46:24,813 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:46:24,813 INFO L85 PathProgramCache]: Analyzing trace with hash 551870655, now seen corresponding path program 26 times [2022-03-20 12:46:24,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:46:24,814 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251525861] [2022-03-20 12:46:24,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:46:24,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:46:24,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:46:24,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:46:24,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:46:24,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2022-03-20 12:46:24,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:46:25,000 INFO L134 CoverageAnalysis]: Checked inductivity of 679 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 483 trivial. 0 not checked. [2022-03-20 12:46:25,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:46:25,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251525861] [2022-03-20 12:46:25,000 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251525861] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:46:25,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926849239] [2022-03-20 12:46:25,000 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 12:46:25,000 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:46:25,001 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:46:25,010 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 12:46:25,037 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-20 12:46:25,145 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 12:46:25,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:46:25,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 474 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-20 12:46:25,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:46:25,263 INFO L134 CoverageAnalysis]: Checked inductivity of 679 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 483 trivial. 0 not checked. [2022-03-20 12:46:25,263 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:46:25,664 INFO L134 CoverageAnalysis]: Checked inductivity of 679 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 483 trivial. 0 not checked. [2022-03-20 12:46:25,665 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1926849239] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:46:25,665 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:46:25,665 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 17] total 35 [2022-03-20 12:46:25,665 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:46:25,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [616846342] [2022-03-20 12:46:25,665 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [616846342] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:46:25,665 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:46:25,665 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-03-20 12:46:25,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717265267] [2022-03-20 12:46:25,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:46:25,666 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-20 12:46:25,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:46:25,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-20 12:46:25,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=532, Invalid=658, Unknown=0, NotChecked=0, Total=1190 [2022-03-20 12:46:25,667 INFO L87 Difference]: Start difference. First operand 348 states and 489 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 17 states have internal predecessors, (49), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 12:46:26,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:46:26,417 INFO L93 Difference]: Finished difference Result 716 states and 1038 transitions. [2022-03-20 12:46:26,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-20 12:46:26,418 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 17 states have internal predecessors, (49), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 120 [2022-03-20 12:46:26,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:46:26,419 INFO L225 Difference]: With dead ends: 716 [2022-03-20 12:46:26,419 INFO L226 Difference]: Without dead ends: 403 [2022-03-20 12:46:26,421 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1083, Invalid=1569, Unknown=0, NotChecked=0, Total=2652 [2022-03-20 12:46:26,421 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 940 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 867 mSolverCounterSat, 415 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 944 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 1282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 415 IncrementalHoareTripleChecker+Valid, 867 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 12:46:26,421 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [944 Valid, 45 Invalid, 1282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [415 Valid, 867 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 12:46:26,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2022-03-20 12:46:26,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 371. [2022-03-20 12:46:26,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 371 states, 318 states have (on average 1.3459119496855345) internal successors, (428), 318 states have internal predecessors, (428), 48 states have call successors, (48), 6 states have call predecessors, (48), 4 states have return successors, (46), 46 states have call predecessors, (46), 46 states have call successors, (46) [2022-03-20 12:46:26,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 522 transitions. [2022-03-20 12:46:26,466 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 522 transitions. Word has length 120 [2022-03-20 12:46:26,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:46:26,466 INFO L478 AbstractCegarLoop]: Abstraction has 371 states and 522 transitions. [2022-03-20 12:46:26,466 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 17 states have internal predecessors, (49), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 12:46:26,466 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 522 transitions. [2022-03-20 12:46:26,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-03-20 12:46:26,468 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:46:26,468 INFO L499 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:46:26,485 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-03-20 12:46:26,682 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:46:26,682 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:46:26,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:46:26,683 INFO L85 PathProgramCache]: Analyzing trace with hash -37648467, now seen corresponding path program 27 times [2022-03-20 12:46:26,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:46:26,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2128293972] [2022-03-20 12:46:26,684 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:46:26,684 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:46:26,684 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:46:26,684 INFO L85 PathProgramCache]: Analyzing trace with hash -37648467, now seen corresponding path program 28 times [2022-03-20 12:46:26,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:46:26,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570005631] [2022-03-20 12:46:26,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:46:26,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:46:26,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:46:26,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:46:26,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:46:26,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2022-03-20 12:46:26,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:46:26,917 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 555 trivial. 0 not checked. [2022-03-20 12:46:26,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:46:26,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570005631] [2022-03-20 12:46:26,917 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570005631] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:46:26,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [425165259] [2022-03-20 12:46:26,918 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 12:46:26,918 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:46:26,918 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:46:26,940 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 12:46:26,946 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-20 12:46:27,169 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 12:46:27,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:46:27,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 500 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-20 12:46:27,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:46:27,323 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 555 trivial. 0 not checked. [2022-03-20 12:46:27,323 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:46:27,731 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 555 trivial. 0 not checked. [2022-03-20 12:46:27,732 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [425165259] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:46:27,732 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:46:27,732 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18, 18] total 37 [2022-03-20 12:46:27,732 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:46:27,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2128293972] [2022-03-20 12:46:27,732 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2128293972] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:46:27,732 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:46:27,732 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-03-20 12:46:27,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456375395] [2022-03-20 12:46:27,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:46:27,733 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-20 12:46:27,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:46:27,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-20 12:46:27,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=599, Invalid=733, Unknown=0, NotChecked=0, Total=1332 [2022-03-20 12:46:27,734 INFO L87 Difference]: Start difference. First operand 371 states and 522 transitions. Second operand has 20 states, 20 states have (on average 2.55) internal successors, (51), 18 states have internal predecessors, (51), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 12:46:28,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:46:28,575 INFO L93 Difference]: Finished difference Result 760 states and 1103 transitions. [2022-03-20 12:46:28,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-20 12:46:28,576 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.55) internal successors, (51), 18 states have internal predecessors, (51), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 127 [2022-03-20 12:46:28,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:46:28,578 INFO L225 Difference]: With dead ends: 760 [2022-03-20 12:46:28,578 INFO L226 Difference]: Without dead ends: 426 [2022-03-20 12:46:28,580 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 241 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1218, Invalid=1752, Unknown=0, NotChecked=0, Total=2970 [2022-03-20 12:46:28,580 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 905 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 902 mSolverCounterSat, 376 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 909 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 1278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 376 IncrementalHoareTripleChecker+Valid, 902 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-20 12:46:28,580 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [909 Valid, 49 Invalid, 1278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [376 Valid, 902 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-20 12:46:28,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2022-03-20 12:46:28,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 394. [2022-03-20 12:46:28,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 394 states, 338 states have (on average 1.3461538461538463) internal successors, (455), 338 states have internal predecessors, (455), 51 states have call successors, (51), 6 states have call predecessors, (51), 4 states have return successors, (49), 49 states have call predecessors, (49), 49 states have call successors, (49) [2022-03-20 12:46:28,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 555 transitions. [2022-03-20 12:46:28,701 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 555 transitions. Word has length 127 [2022-03-20 12:46:28,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:46:28,702 INFO L478 AbstractCegarLoop]: Abstraction has 394 states and 555 transitions. [2022-03-20 12:46:28,702 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.55) internal successors, (51), 18 states have internal predecessors, (51), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 12:46:28,702 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 555 transitions. [2022-03-20 12:46:28,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-03-20 12:46:28,703 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:46:28,703 INFO L499 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:46:28,721 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-03-20 12:46:28,919 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-03-20 12:46:28,920 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:46:28,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:46:28,920 INFO L85 PathProgramCache]: Analyzing trace with hash 408078211, now seen corresponding path program 29 times [2022-03-20 12:46:28,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:46:28,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1627415233] [2022-03-20 12:46:28,921 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:46:28,921 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:46:28,921 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:46:28,921 INFO L85 PathProgramCache]: Analyzing trace with hash 408078211, now seen corresponding path program 30 times [2022-03-20 12:46:28,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:46:28,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048305288] [2022-03-20 12:46:28,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:46:28,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:46:28,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:46:29,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:46:29,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:46:29,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2022-03-20 12:46:29,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:46:29,113 INFO L134 CoverageAnalysis]: Checked inductivity of 888 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 632 trivial. 0 not checked. [2022-03-20 12:46:29,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:46:29,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048305288] [2022-03-20 12:46:29,113 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048305288] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:46:29,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645534191] [2022-03-20 12:46:29,113 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 12:46:29,113 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:46:29,113 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:46:29,115 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 12:46:29,121 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-20 12:46:29,247 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 12:46:29,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:46:29,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 12:46:29,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:46:29,440 INFO L134 CoverageAnalysis]: Checked inductivity of 888 backedges. 61 proven. 1 refuted. 0 times theorem prover too weak. 826 trivial. 0 not checked. [2022-03-20 12:46:29,440 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:46:29,670 INFO L134 CoverageAnalysis]: Checked inductivity of 888 backedges. 61 proven. 1 refuted. 0 times theorem prover too weak. 826 trivial. 0 not checked. [2022-03-20 12:46:29,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [645534191] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:46:29,670 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:46:29,671 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 7, 7] total 29 [2022-03-20 12:46:29,671 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:46:29,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1627415233] [2022-03-20 12:46:29,671 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1627415233] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:46:29,671 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:46:29,671 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-03-20 12:46:29,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478197530] [2022-03-20 12:46:29,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:46:29,671 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-20 12:46:29,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:46:29,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-20 12:46:29,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=612, Unknown=0, NotChecked=0, Total=812 [2022-03-20 12:46:29,672 INFO L87 Difference]: Start difference. First operand 394 states and 555 transitions. Second operand has 21 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 19 states have internal predecessors, (53), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 12:46:30,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:46:30,413 INFO L93 Difference]: Finished difference Result 804 states and 1168 transitions. [2022-03-20 12:46:30,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-20 12:46:30,421 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 19 states have internal predecessors, (53), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 134 [2022-03-20 12:46:30,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:46:30,423 INFO L225 Difference]: With dead ends: 804 [2022-03-20 12:46:30,423 INFO L226 Difference]: Without dead ends: 449 [2022-03-20 12:46:30,427 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 310 GetRequests, 263 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 372 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=583, Invalid=1673, Unknown=0, NotChecked=0, Total=2256 [2022-03-20 12:46:30,428 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 997 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 893 mSolverCounterSat, 388 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1001 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 1281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 388 IncrementalHoareTripleChecker+Valid, 893 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 12:46:30,429 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1001 Valid, 49 Invalid, 1281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [388 Valid, 893 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 12:46:30,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2022-03-20 12:46:30,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 417. [2022-03-20 12:46:30,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 417 states, 358 states have (on average 1.3463687150837989) internal successors, (482), 358 states have internal predecessors, (482), 54 states have call successors, (54), 6 states have call predecessors, (54), 4 states have return successors, (52), 52 states have call predecessors, (52), 52 states have call successors, (52) [2022-03-20 12:46:30,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 588 transitions. [2022-03-20 12:46:30,500 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 588 transitions. Word has length 134 [2022-03-20 12:46:30,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:46:30,500 INFO L478 AbstractCegarLoop]: Abstraction has 417 states and 588 transitions. [2022-03-20 12:46:30,500 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 19 states have internal predecessors, (53), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 12:46:30,500 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 588 transitions. [2022-03-20 12:46:30,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-03-20 12:46:30,502 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:46:30,502 INFO L499 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:46:30,519 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-03-20 12:46:30,716 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:46:30,717 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:46:30,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:46:30,717 INFO L85 PathProgramCache]: Analyzing trace with hash 143634153, now seen corresponding path program 31 times [2022-03-20 12:46:30,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:46:30,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [633254453] [2022-03-20 12:46:30,718 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:46:30,718 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:46:30,718 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:46:30,718 INFO L85 PathProgramCache]: Analyzing trace with hash 143634153, now seen corresponding path program 32 times [2022-03-20 12:46:30,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:46:30,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248438593] [2022-03-20 12:46:30,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:46:30,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:46:30,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:46:30,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:46:30,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:46:30,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2022-03-20 12:46:30,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:46:30,924 INFO L134 CoverageAnalysis]: Checked inductivity of 1003 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 714 trivial. 0 not checked. [2022-03-20 12:46:30,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:46:30,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248438593] [2022-03-20 12:46:30,924 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248438593] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:46:30,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [625389028] [2022-03-20 12:46:30,925 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 12:46:30,925 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:46:30,925 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:46:30,926 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 12:46:30,927 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-20 12:46:31,060 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 12:46:31,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:46:31,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 552 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-20 12:46:31,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:46:31,213 INFO L134 CoverageAnalysis]: Checked inductivity of 1003 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 714 trivial. 0 not checked. [2022-03-20 12:46:31,213 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:46:31,743 INFO L134 CoverageAnalysis]: Checked inductivity of 1003 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 714 trivial. 0 not checked. [2022-03-20 12:46:31,744 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [625389028] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:46:31,744 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:46:31,744 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20, 20] total 41 [2022-03-20 12:46:31,744 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:46:31,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [633254453] [2022-03-20 12:46:31,744 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [633254453] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:46:31,744 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:46:31,744 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-03-20 12:46:31,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875091246] [2022-03-20 12:46:31,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:46:31,745 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-20 12:46:31,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:46:31,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-20 12:46:31,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=745, Invalid=895, Unknown=0, NotChecked=0, Total=1640 [2022-03-20 12:46:31,745 INFO L87 Difference]: Start difference. First operand 417 states and 588 transitions. Second operand has 22 states, 22 states have (on average 2.5) internal successors, (55), 20 states have internal predecessors, (55), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 12:46:32,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:46:32,606 INFO L93 Difference]: Finished difference Result 848 states and 1233 transitions. [2022-03-20 12:46:32,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-20 12:46:32,607 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.5) internal successors, (55), 20 states have internal predecessors, (55), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 141 [2022-03-20 12:46:32,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:46:32,610 INFO L225 Difference]: With dead ends: 848 [2022-03-20 12:46:32,610 INFO L226 Difference]: Without dead ends: 472 [2022-03-20 12:46:32,612 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 267 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1512, Invalid=2148, Unknown=0, NotChecked=0, Total=3660 [2022-03-20 12:46:32,614 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 1221 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 939 mSolverCounterSat, 486 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1225 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 1425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 486 IncrementalHoareTripleChecker+Valid, 939 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-20 12:46:32,614 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1225 Valid, 45 Invalid, 1425 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [486 Valid, 939 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-20 12:46:32,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2022-03-20 12:46:32,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 440. [2022-03-20 12:46:32,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440 states, 378 states have (on average 1.3465608465608465) internal successors, (509), 378 states have internal predecessors, (509), 57 states have call successors, (57), 6 states have call predecessors, (57), 4 states have return successors, (55), 55 states have call predecessors, (55), 55 states have call successors, (55) [2022-03-20 12:46:32,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 621 transitions. [2022-03-20 12:46:32,716 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 621 transitions. Word has length 141 [2022-03-20 12:46:32,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:46:32,716 INFO L478 AbstractCegarLoop]: Abstraction has 440 states and 621 transitions. [2022-03-20 12:46:32,716 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.5) internal successors, (55), 20 states have internal predecessors, (55), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 12:46:32,716 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 621 transitions. [2022-03-20 12:46:32,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2022-03-20 12:46:32,717 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:46:32,718 INFO L499 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:46:32,763 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-03-20 12:46:32,931 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:46:32,932 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:46:32,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:46:32,932 INFO L85 PathProgramCache]: Analyzing trace with hash 2040554055, now seen corresponding path program 33 times [2022-03-20 12:46:32,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:46:32,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1722707890] [2022-03-20 12:46:32,934 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:46:32,934 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:46:32,935 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:46:32,935 INFO L85 PathProgramCache]: Analyzing trace with hash 2040554055, now seen corresponding path program 34 times [2022-03-20 12:46:32,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:46:32,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525076751] [2022-03-20 12:46:32,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:46:32,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:46:32,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:46:33,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:46:33,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:46:33,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2022-03-20 12:46:33,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:46:33,150 INFO L134 CoverageAnalysis]: Checked inductivity of 1125 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 801 trivial. 0 not checked. [2022-03-20 12:46:33,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:46:33,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525076751] [2022-03-20 12:46:33,151 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525076751] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:46:33,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534260154] [2022-03-20 12:46:33,151 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 12:46:33,151 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:46:33,151 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:46:33,168 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 12:46:33,169 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-03-20 12:46:33,310 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 12:46:33,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:46:33,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 578 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-20 12:46:33,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:46:33,457 INFO L134 CoverageAnalysis]: Checked inductivity of 1125 backedges. 0 proven. 800 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2022-03-20 12:46:33,457 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:46:33,954 INFO L134 CoverageAnalysis]: Checked inductivity of 1125 backedges. 0 proven. 800 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2022-03-20 12:46:33,954 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1534260154] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:46:33,954 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:46:33,954 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21, 21] total 43 [2022-03-20 12:46:33,955 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:46:33,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1722707890] [2022-03-20 12:46:33,955 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1722707890] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:46:33,955 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:46:33,955 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-03-20 12:46:33,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476549706] [2022-03-20 12:46:33,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:46:33,956 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-20 12:46:33,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:46:33,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-20 12:46:33,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=824, Invalid=982, Unknown=0, NotChecked=0, Total=1806 [2022-03-20 12:46:33,957 INFO L87 Difference]: Start difference. First operand 440 states and 621 transitions. Second operand has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 21 states have internal predecessors, (57), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 12:46:35,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:46:35,081 INFO L93 Difference]: Finished difference Result 892 states and 1298 transitions. [2022-03-20 12:46:35,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-20 12:46:35,082 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 21 states have internal predecessors, (57), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 148 [2022-03-20 12:46:35,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:46:35,084 INFO L225 Difference]: With dead ends: 892 [2022-03-20 12:46:35,084 INFO L226 Difference]: Without dead ends: 495 [2022-03-20 12:46:35,085 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 342 GetRequests, 280 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1671, Invalid=2361, Unknown=0, NotChecked=0, Total=4032 [2022-03-20 12:46:35,086 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 1032 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 1077 mSolverCounterSat, 405 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1036 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 1482 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 405 IncrementalHoareTripleChecker+Valid, 1077 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-20 12:46:35,086 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1036 Valid, 53 Invalid, 1482 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [405 Valid, 1077 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-20 12:46:35,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2022-03-20 12:46:35,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 463. [2022-03-20 12:46:35,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 463 states, 398 states have (on average 1.3467336683417086) internal successors, (536), 398 states have internal predecessors, (536), 60 states have call successors, (60), 6 states have call predecessors, (60), 4 states have return successors, (58), 58 states have call predecessors, (58), 58 states have call successors, (58) [2022-03-20 12:46:35,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 463 states to 463 states and 654 transitions. [2022-03-20 12:46:35,172 INFO L78 Accepts]: Start accepts. Automaton has 463 states and 654 transitions. Word has length 148 [2022-03-20 12:46:35,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:46:35,173 INFO L478 AbstractCegarLoop]: Abstraction has 463 states and 654 transitions. [2022-03-20 12:46:35,173 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 21 states have internal predecessors, (57), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 12:46:35,173 INFO L276 IsEmpty]: Start isEmpty. Operand 463 states and 654 transitions. [2022-03-20 12:46:35,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-03-20 12:46:35,174 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:46:35,174 INFO L499 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:46:35,194 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-03-20 12:46:35,394 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:46:35,394 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:46:35,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:46:35,395 INFO L85 PathProgramCache]: Analyzing trace with hash 1629389349, now seen corresponding path program 35 times [2022-03-20 12:46:35,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:46:35,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2115112671] [2022-03-20 12:46:35,396 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:46:35,396 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:46:35,396 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:46:35,396 INFO L85 PathProgramCache]: Analyzing trace with hash 1629389349, now seen corresponding path program 36 times [2022-03-20 12:46:35,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:46:35,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569160690] [2022-03-20 12:46:35,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:46:35,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:46:35,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:46:35,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:46:35,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:46:35,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2022-03-20 12:46:35,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:46:35,643 INFO L134 CoverageAnalysis]: Checked inductivity of 1254 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 893 trivial. 0 not checked. [2022-03-20 12:46:35,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:46:35,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569160690] [2022-03-20 12:46:35,643 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569160690] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:46:35,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [483712516] [2022-03-20 12:46:35,643 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 12:46:35,643 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:46:35,643 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:46:35,664 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 12:46:35,680 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-03-20 12:46:35,798 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 12:46:35,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:46:35,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 12:46:35,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:46:36,043 INFO L134 CoverageAnalysis]: Checked inductivity of 1254 backedges. 73 proven. 1 refuted. 0 times theorem prover too weak. 1180 trivial. 0 not checked. [2022-03-20 12:46:36,043 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:46:36,286 INFO L134 CoverageAnalysis]: Checked inductivity of 1254 backedges. 73 proven. 1 refuted. 0 times theorem prover too weak. 1180 trivial. 0 not checked. [2022-03-20 12:46:36,286 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [483712516] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:46:36,286 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:46:36,286 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 7, 7] total 32 [2022-03-20 12:46:36,286 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:46:36,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2115112671] [2022-03-20 12:46:36,286 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2115112671] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:46:36,287 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:46:36,287 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-03-20 12:46:36,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297324742] [2022-03-20 12:46:36,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:46:36,287 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-20 12:46:36,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:46:36,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-20 12:46:36,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=260, Invalid=732, Unknown=0, NotChecked=0, Total=992 [2022-03-20 12:46:36,288 INFO L87 Difference]: Start difference. First operand 463 states and 654 transitions. Second operand has 24 states, 24 states have (on average 2.4583333333333335) internal successors, (59), 22 states have internal predecessors, (59), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 12:46:37,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:46:37,478 INFO L93 Difference]: Finished difference Result 936 states and 1363 transitions. [2022-03-20 12:46:37,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-20 12:46:37,479 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.4583333333333335) internal successors, (59), 22 states have internal predecessors, (59), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 155 [2022-03-20 12:46:37,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:46:37,481 INFO L225 Difference]: With dead ends: 936 [2022-03-20 12:46:37,482 INFO L226 Difference]: Without dead ends: 518 [2022-03-20 12:46:37,484 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 358 GetRequests, 305 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 468 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=769, Invalid=2093, Unknown=0, NotChecked=0, Total=2862 [2022-03-20 12:46:37,484 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 1060 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 1152 mSolverCounterSat, 411 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1064 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 1563 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 411 IncrementalHoareTripleChecker+Valid, 1152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-20 12:46:37,484 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1064 Valid, 53 Invalid, 1563 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [411 Valid, 1152 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-20 12:46:37,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2022-03-20 12:46:37,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 486. [2022-03-20 12:46:37,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 486 states, 418 states have (on average 1.3468899521531101) internal successors, (563), 418 states have internal predecessors, (563), 63 states have call successors, (63), 6 states have call predecessors, (63), 4 states have return successors, (61), 61 states have call predecessors, (61), 61 states have call successors, (61) [2022-03-20 12:46:37,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 486 states to 486 states and 687 transitions. [2022-03-20 12:46:37,583 INFO L78 Accepts]: Start accepts. Automaton has 486 states and 687 transitions. Word has length 155 [2022-03-20 12:46:37,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:46:37,583 INFO L478 AbstractCegarLoop]: Abstraction has 486 states and 687 transitions. [2022-03-20 12:46:37,583 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.4583333333333335) internal successors, (59), 22 states have internal predecessors, (59), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 12:46:37,583 INFO L276 IsEmpty]: Start isEmpty. Operand 486 states and 687 transitions. [2022-03-20 12:46:37,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2022-03-20 12:46:37,587 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:46:37,587 INFO L499 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:46:37,620 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-03-20 12:46:37,820 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:46:37,820 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:46:37,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:46:37,821 INFO L85 PathProgramCache]: Analyzing trace with hash -148049653, now seen corresponding path program 37 times [2022-03-20 12:46:37,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:46:37,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [503553453] [2022-03-20 12:46:37,822 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:46:37,822 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:46:37,822 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:46:37,822 INFO L85 PathProgramCache]: Analyzing trace with hash -148049653, now seen corresponding path program 38 times [2022-03-20 12:46:37,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:46:37,822 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437903434] [2022-03-20 12:46:37,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:46:37,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:46:37,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:46:38,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:46:38,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:46:38,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2022-03-20 12:46:38,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:46:38,073 INFO L134 CoverageAnalysis]: Checked inductivity of 1390 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 990 trivial. 0 not checked. [2022-03-20 12:46:38,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:46:38,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437903434] [2022-03-20 12:46:38,073 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437903434] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:46:38,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851913114] [2022-03-20 12:46:38,073 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 12:46:38,073 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:46:38,073 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:46:38,074 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 12:46:38,076 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-03-20 12:46:38,239 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 12:46:38,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:46:38,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 630 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-20 12:46:38,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:46:38,381 INFO L134 CoverageAnalysis]: Checked inductivity of 1390 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 990 trivial. 0 not checked. [2022-03-20 12:46:38,381 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:46:39,035 INFO L134 CoverageAnalysis]: Checked inductivity of 1390 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 990 trivial. 0 not checked. [2022-03-20 12:46:39,035 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [851913114] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:46:39,035 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:46:39,035 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 23, 23] total 47 [2022-03-20 12:46:39,036 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:46:39,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [503553453] [2022-03-20 12:46:39,036 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [503553453] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:46:39,036 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:46:39,036 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-03-20 12:46:39,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767978327] [2022-03-20 12:46:39,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:46:39,036 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-20 12:46:39,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:46:39,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-20 12:46:39,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=994, Invalid=1168, Unknown=0, NotChecked=0, Total=2162 [2022-03-20 12:46:39,038 INFO L87 Difference]: Start difference. First operand 486 states and 687 transitions. Second operand has 25 states, 25 states have (on average 2.44) internal successors, (61), 23 states have internal predecessors, (61), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 12:46:40,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:46:40,190 INFO L93 Difference]: Finished difference Result 980 states and 1428 transitions. [2022-03-20 12:46:40,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-20 12:46:40,190 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.44) internal successors, (61), 23 states have internal predecessors, (61), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 162 [2022-03-20 12:46:40,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:46:40,192 INFO L225 Difference]: With dead ends: 980 [2022-03-20 12:46:40,192 INFO L226 Difference]: Without dead ends: 541 [2022-03-20 12:46:40,194 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 374 GetRequests, 306 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 412 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=2013, Invalid=2817, Unknown=0, NotChecked=0, Total=4830 [2022-03-20 12:46:40,194 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 1164 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 1204 mSolverCounterSat, 478 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1168 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 1682 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 478 IncrementalHoareTripleChecker+Valid, 1204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-20 12:46:40,195 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1168 Valid, 51 Invalid, 1682 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [478 Valid, 1204 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-20 12:46:40,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 541 states. [2022-03-20 12:46:40,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 541 to 509. [2022-03-20 12:46:40,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 509 states, 438 states have (on average 1.3470319634703196) internal successors, (590), 438 states have internal predecessors, (590), 66 states have call successors, (66), 6 states have call predecessors, (66), 4 states have return successors, (64), 64 states have call predecessors, (64), 64 states have call successors, (64) [2022-03-20 12:46:40,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 509 states to 509 states and 720 transitions. [2022-03-20 12:46:40,276 INFO L78 Accepts]: Start accepts. Automaton has 509 states and 720 transitions. Word has length 162 [2022-03-20 12:46:40,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:46:40,276 INFO L478 AbstractCegarLoop]: Abstraction has 509 states and 720 transitions. [2022-03-20 12:46:40,276 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.44) internal successors, (61), 23 states have internal predecessors, (61), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 12:46:40,276 INFO L276 IsEmpty]: Start isEmpty. Operand 509 states and 720 transitions. [2022-03-20 12:46:40,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2022-03-20 12:46:40,278 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:46:40,278 INFO L499 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:46:40,298 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-03-20 12:46:40,491 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-03-20 12:46:40,491 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:46:40,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:46:40,492 INFO L85 PathProgramCache]: Analyzing trace with hash 491700577, now seen corresponding path program 39 times [2022-03-20 12:46:40,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:46:40,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1128830995] [2022-03-20 12:46:40,493 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:46:40,493 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:46:40,493 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:46:40,493 INFO L85 PathProgramCache]: Analyzing trace with hash 491700577, now seen corresponding path program 40 times [2022-03-20 12:46:40,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:46:40,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280188197] [2022-03-20 12:46:40,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:46:40,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:46:40,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:46:40,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:46:40,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:46:40,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 154 [2022-03-20 12:46:40,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:46:40,744 INFO L134 CoverageAnalysis]: Checked inductivity of 1533 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 1092 trivial. 0 not checked. [2022-03-20 12:46:40,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:46:40,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280188197] [2022-03-20 12:46:40,745 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280188197] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:46:40,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343578035] [2022-03-20 12:46:40,745 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 12:46:40,745 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:46:40,745 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:46:40,746 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 12:46:40,747 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-03-20 12:46:40,922 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 12:46:40,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:46:40,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 656 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-20 12:46:40,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:46:41,054 INFO L134 CoverageAnalysis]: Checked inductivity of 1533 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 1092 trivial. 0 not checked. [2022-03-20 12:46:41,054 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:46:41,508 INFO L134 CoverageAnalysis]: Checked inductivity of 1533 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 1092 trivial. 0 not checked. [2022-03-20 12:46:41,508 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [343578035] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:46:41,508 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:46:41,508 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 24, 24] total 49 [2022-03-20 12:46:41,509 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:46:41,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1128830995] [2022-03-20 12:46:41,509 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1128830995] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:46:41,509 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:46:41,509 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-03-20 12:46:41,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206316645] [2022-03-20 12:46:41,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:46:41,509 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-20 12:46:41,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:46:41,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-20 12:46:41,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1085, Invalid=1267, Unknown=0, NotChecked=0, Total=2352 [2022-03-20 12:46:41,514 INFO L87 Difference]: Start difference. First operand 509 states and 720 transitions. Second operand has 26 states, 26 states have (on average 2.423076923076923) internal successors, (63), 24 states have internal predecessors, (63), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 12:46:42,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:46:42,445 INFO L93 Difference]: Finished difference Result 1024 states and 1493 transitions. [2022-03-20 12:46:42,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-20 12:46:42,451 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.423076923076923) internal successors, (63), 24 states have internal predecessors, (63), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 169 [2022-03-20 12:46:42,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:46:42,454 INFO L225 Difference]: With dead ends: 1024 [2022-03-20 12:46:42,454 INFO L226 Difference]: Without dead ends: 564 [2022-03-20 12:46:42,456 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 390 GetRequests, 319 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 443 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=2196, Invalid=3060, Unknown=0, NotChecked=0, Total=5256 [2022-03-20 12:46:42,456 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 1366 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 1189 mSolverCounterSat, 567 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1370 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 1756 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 567 IncrementalHoareTripleChecker+Valid, 1189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-20 12:46:42,456 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1370 Valid, 51 Invalid, 1756 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [567 Valid, 1189 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-20 12:46:42,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2022-03-20 12:46:42,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 532. [2022-03-20 12:46:42,573 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) [2022-03-20 12:46:42,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 532 states to 532 states and 753 transitions. [2022-03-20 12:46:42,574 INFO L78 Accepts]: Start accepts. Automaton has 532 states and 753 transitions. Word has length 169 [2022-03-20 12:46:42,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:46:42,574 INFO L478 AbstractCegarLoop]: Abstraction has 532 states and 753 transitions. [2022-03-20 12:46:42,574 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.423076923076923) internal successors, (63), 24 states have internal predecessors, (63), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 12:46:42,574 INFO L276 IsEmpty]: Start isEmpty. Operand 532 states and 753 transitions. [2022-03-20 12:46:42,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2022-03-20 12:46:42,576 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:46:42,576 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] [2022-03-20 12:46:42,601 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-03-20 12:46:42,793 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-03-20 12:46:42,794 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:46:42,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:46:42,794 INFO L85 PathProgramCache]: Analyzing trace with hash 1540862927, now seen corresponding path program 41 times [2022-03-20 12:46:42,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:46:42,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1011474663] [2022-03-20 12:46:42,795 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:46:42,795 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:46:42,795 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:46:42,795 INFO L85 PathProgramCache]: Analyzing trace with hash 1540862927, now seen corresponding path program 42 times [2022-03-20 12:46:42,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:46:42,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12713564] [2022-03-20 12:46:42,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:46:42,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:46:42,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:46:43,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:46:43,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:46:43,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 161 [2022-03-20 12:46:43,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:46:43,052 INFO L134 CoverageAnalysis]: Checked inductivity of 1683 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 1199 trivial. 0 not checked. [2022-03-20 12:46:43,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:46:43,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12713564] [2022-03-20 12:46:43,052 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12713564] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:46:43,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546512366] [2022-03-20 12:46:43,052 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 12:46:43,053 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:46:43,053 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:46:43,068 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 12:46:43,069 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-03-20 12:46:43,201 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 12:46:43,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:46:43,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 12:46:43,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:46:43,414 INFO L134 CoverageAnalysis]: Checked inductivity of 1683 backedges. 85 proven. 1 refuted. 0 times theorem prover too weak. 1597 trivial. 0 not checked. [2022-03-20 12:46:43,414 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:46:43,613 INFO L134 CoverageAnalysis]: Checked inductivity of 1683 backedges. 85 proven. 1 refuted. 0 times theorem prover too weak. 1597 trivial. 0 not checked. [2022-03-20 12:46:43,614 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1546512366] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:46:43,614 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:46:43,614 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 7, 7] total 35 [2022-03-20 12:46:43,614 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:46:43,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1011474663] [2022-03-20 12:46:43,615 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1011474663] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:46:43,615 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:46:43,615 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-03-20 12:46:43,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526732804] [2022-03-20 12:46:43,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:46:43,615 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-20 12:46:43,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:46:43,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-20 12:46:43,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=861, Unknown=0, NotChecked=0, Total=1190 [2022-03-20 12:46:43,616 INFO L87 Difference]: Start difference. First operand 532 states and 753 transitions. Second operand has 27 states, 27 states have (on average 2.4074074074074074) internal successors, (65), 25 states have internal predecessors, (65), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 12:46:44,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:46:44,683 INFO L93 Difference]: Finished difference Result 1068 states and 1558 transitions. [2022-03-20 12:46:44,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-20 12:46:44,684 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.4074074074074074) internal successors, (65), 25 states have internal predecessors, (65), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 176 [2022-03-20 12:46:44,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:46:44,687 INFO L225 Difference]: With dead ends: 1068 [2022-03-20 12:46:44,687 INFO L226 Difference]: Without dead ends: 587 [2022-03-20 12:46:44,707 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 406 GetRequests, 347 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 573 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=982, Invalid=2558, Unknown=0, NotChecked=0, Total=3540 [2022-03-20 12:46:44,708 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 1428 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 1199 mSolverCounterSat, 594 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1432 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 1793 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 594 IncrementalHoareTripleChecker+Valid, 1199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-20 12:46:44,708 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1432 Valid, 47 Invalid, 1793 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [594 Valid, 1199 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-20 12:46:44,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 587 states. [2022-03-20 12:46:44,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 587 to 555. [2022-03-20 12:46:44,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 555 states, 478 states have (on average 1.3472803347280335) internal successors, (644), 478 states have internal predecessors, (644), 72 states have call successors, (72), 6 states have call predecessors, (72), 4 states have return successors, (70), 70 states have call predecessors, (70), 70 states have call successors, (70) [2022-03-20 12:46:44,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 555 states to 555 states and 786 transitions. [2022-03-20 12:46:44,803 INFO L78 Accepts]: Start accepts. Automaton has 555 states and 786 transitions. Word has length 176 [2022-03-20 12:46:44,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:46:44,803 INFO L478 AbstractCegarLoop]: Abstraction has 555 states and 786 transitions. [2022-03-20 12:46:44,803 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.4074074074074074) internal successors, (65), 25 states have internal predecessors, (65), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 12:46:44,804 INFO L276 IsEmpty]: Start isEmpty. Operand 555 states and 786 transitions. [2022-03-20 12:46:44,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2022-03-20 12:46:44,805 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:46:44,805 INFO L499 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:46:44,834 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-03-20 12:46:45,020 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:46:45,020 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:46:45,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:46:45,020 INFO L85 PathProgramCache]: Analyzing trace with hash 1753296029, now seen corresponding path program 43 times [2022-03-20 12:46:45,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:46:45,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [612044026] [2022-03-20 12:46:45,022 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:46:45,022 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:46:45,022 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:46:45,022 INFO L85 PathProgramCache]: Analyzing trace with hash 1753296029, now seen corresponding path program 44 times [2022-03-20 12:46:45,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:46:45,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556552845] [2022-03-20 12:46:45,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:46:45,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:46:45,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:46:45,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:46:45,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:46:45,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 168 [2022-03-20 12:46:45,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:46:45,338 INFO L134 CoverageAnalysis]: Checked inductivity of 1840 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 1311 trivial. 0 not checked. [2022-03-20 12:46:45,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:46:45,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556552845] [2022-03-20 12:46:45,338 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556552845] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:46:45,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948434604] [2022-03-20 12:46:45,338 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 12:46:45,338 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:46:45,338 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:46:45,339 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 12:46:45,340 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-03-20 12:46:45,535 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 12:46:45,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:46:45,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 708 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-20 12:46:45,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:46:45,713 INFO L134 CoverageAnalysis]: Checked inductivity of 1840 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 1311 trivial. 0 not checked. [2022-03-20 12:46:45,713 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:46:46,538 INFO L134 CoverageAnalysis]: Checked inductivity of 1840 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 1311 trivial. 0 not checked. [2022-03-20 12:46:46,538 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [948434604] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:46:46,538 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:46:46,538 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 26, 26] total 53 [2022-03-20 12:46:46,538 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:46:46,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [612044026] [2022-03-20 12:46:46,539 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [612044026] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:46:46,539 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:46:46,539 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-03-20 12:46:46,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615555300] [2022-03-20 12:46:46,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:46:46,539 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-20 12:46:46,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:46:46,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-20 12:46:46,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1279, Invalid=1477, Unknown=0, NotChecked=0, Total=2756 [2022-03-20 12:46:46,540 INFO L87 Difference]: Start difference. First operand 555 states and 786 transitions. Second operand has 28 states, 28 states have (on average 2.392857142857143) internal successors, (67), 26 states have internal predecessors, (67), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 12:46:47,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:46:47,900 INFO L93 Difference]: Finished difference Result 1112 states and 1623 transitions. [2022-03-20 12:46:47,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-20 12:46:47,901 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.392857142857143) internal successors, (67), 26 states have internal predecessors, (67), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 183 [2022-03-20 12:46:47,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:46:47,904 INFO L225 Difference]: With dead ends: 1112 [2022-03-20 12:46:47,904 INFO L226 Difference]: Without dead ends: 610 [2022-03-20 12:46:47,907 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 422 GetRequests, 345 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 508 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2586, Invalid=3576, Unknown=0, NotChecked=0, Total=6162 [2022-03-20 12:46:47,908 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 1443 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 1347 mSolverCounterSat, 594 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1447 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 1941 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 594 IncrementalHoareTripleChecker+Valid, 1347 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-20 12:46:47,910 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1447 Valid, 51 Invalid, 1941 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [594 Valid, 1347 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-20 12:46:47,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 610 states. [2022-03-20 12:46:48,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 610 to 578. [2022-03-20 12:46:48,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 578 states, 498 states have (on average 1.3473895582329318) internal successors, (671), 498 states have internal predecessors, (671), 75 states have call successors, (75), 6 states have call predecessors, (75), 4 states have return successors, (73), 73 states have call predecessors, (73), 73 states have call successors, (73) [2022-03-20 12:46:48,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 578 states to 578 states and 819 transitions. [2022-03-20 12:46:48,034 INFO L78 Accepts]: Start accepts. Automaton has 578 states and 819 transitions. Word has length 183 [2022-03-20 12:46:48,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:46:48,034 INFO L478 AbstractCegarLoop]: Abstraction has 578 states and 819 transitions. [2022-03-20 12:46:48,034 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.392857142857143) internal successors, (67), 26 states have internal predecessors, (67), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 12:46:48,034 INFO L276 IsEmpty]: Start isEmpty. Operand 578 states and 819 transitions. [2022-03-20 12:46:48,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2022-03-20 12:46:48,036 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:46:48,036 INFO L499 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:46:48,065 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-03-20 12:46:48,253 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:46:48,254 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:46:48,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:46:48,254 INFO L85 PathProgramCache]: Analyzing trace with hash 788523667, now seen corresponding path program 45 times [2022-03-20 12:46:48,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:46:48,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [292621125] [2022-03-20 12:46:48,255 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:46:48,255 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:46:48,255 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:46:48,255 INFO L85 PathProgramCache]: Analyzing trace with hash 788523667, now seen corresponding path program 46 times [2022-03-20 12:46:48,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:46:48,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001068603] [2022-03-20 12:46:48,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:46:48,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:46:48,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:46:48,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:46:48,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:46:48,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2022-03-20 12:46:48,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:46:48,560 INFO L134 CoverageAnalysis]: Checked inductivity of 2004 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 1428 trivial. 0 not checked. [2022-03-20 12:46:48,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:46:48,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001068603] [2022-03-20 12:46:48,560 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001068603] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:46:48,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2003007730] [2022-03-20 12:46:48,560 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 12:46:48,560 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:46:48,561 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:46:48,562 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 12:46:48,562 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-03-20 12:46:48,759 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 12:46:48,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:46:48,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 734 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-20 12:46:48,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:46:49,020 INFO L134 CoverageAnalysis]: Checked inductivity of 2004 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 1428 trivial. 0 not checked. [2022-03-20 12:46:49,020 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:46:49,577 INFO L134 CoverageAnalysis]: Checked inductivity of 2004 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 1428 trivial. 0 not checked. [2022-03-20 12:46:49,577 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2003007730] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:46:49,577 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:46:49,577 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 27, 27] total 55 [2022-03-20 12:46:49,578 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:46:49,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [292621125] [2022-03-20 12:46:49,578 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [292621125] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:46:49,578 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:46:49,578 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-03-20 12:46:49,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823453947] [2022-03-20 12:46:49,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:46:49,578 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-20 12:46:49,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:46:49,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-20 12:46:49,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1382, Invalid=1588, Unknown=0, NotChecked=0, Total=2970 [2022-03-20 12:46:49,579 INFO L87 Difference]: Start difference. First operand 578 states and 819 transitions. Second operand has 29 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 27 states have internal predecessors, (69), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 12:46:50,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:46:50,635 INFO L93 Difference]: Finished difference Result 1156 states and 1688 transitions. [2022-03-20 12:46:50,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-20 12:46:50,635 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 27 states have internal predecessors, (69), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 190 [2022-03-20 12:46:50,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:46:50,637 INFO L225 Difference]: With dead ends: 1156 [2022-03-20 12:46:50,637 INFO L226 Difference]: Without dead ends: 633 [2022-03-20 12:46:50,639 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 438 GetRequests, 358 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 542 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=2793, Invalid=3849, Unknown=0, NotChecked=0, Total=6642 [2022-03-20 12:46:50,639 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 1428 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 1345 mSolverCounterSat, 625 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1432 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 1970 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 625 IncrementalHoareTripleChecker+Valid, 1345 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-20 12:46:50,639 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1432 Valid, 49 Invalid, 1970 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [625 Valid, 1345 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-20 12:46:50,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 633 states. [2022-03-20 12:46:50,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 633 to 601. [2022-03-20 12:46:50,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 601 states, 518 states have (on average 1.3474903474903475) internal successors, (698), 518 states have internal predecessors, (698), 78 states have call successors, (78), 6 states have call predecessors, (78), 4 states have return successors, (76), 76 states have call predecessors, (76), 76 states have call successors, (76) [2022-03-20 12:46:50,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 601 states to 601 states and 852 transitions. [2022-03-20 12:46:50,768 INFO L78 Accepts]: Start accepts. Automaton has 601 states and 852 transitions. Word has length 190 [2022-03-20 12:46:50,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:46:50,768 INFO L478 AbstractCegarLoop]: Abstraction has 601 states and 852 transitions. [2022-03-20 12:46:50,769 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 27 states have internal predecessors, (69), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 12:46:50,769 INFO L276 IsEmpty]: Start isEmpty. Operand 601 states and 852 transitions. [2022-03-20 12:46:50,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2022-03-20 12:46:50,770 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:46:50,770 INFO L499 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:46:50,805 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-03-20 12:46:50,988 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-03-20 12:46:50,988 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:46:50,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:46:50,988 INFO L85 PathProgramCache]: Analyzing trace with hash -543783975, now seen corresponding path program 47 times [2022-03-20 12:46:50,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:46:50,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1865001591] [2022-03-20 12:46:50,990 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:46:50,990 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:46:50,990 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:46:50,990 INFO L85 PathProgramCache]: Analyzing trace with hash -543783975, now seen corresponding path program 48 times [2022-03-20 12:46:50,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:46:50,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120088344] [2022-03-20 12:46:50,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:46:50,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:46:51,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:46:51,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:46:51,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:46:51,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 182 [2022-03-20 12:46:51,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:46:51,278 INFO L134 CoverageAnalysis]: Checked inductivity of 2175 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 1550 trivial. 0 not checked. [2022-03-20 12:46:51,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:46:51,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120088344] [2022-03-20 12:46:51,279 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120088344] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:46:51,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760489134] [2022-03-20 12:46:51,279 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 12:46:51,279 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:46:51,279 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:46:51,281 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 12:46:51,282 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-03-20 12:46:51,430 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 12:46:51,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:46:51,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 12:46:51,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:46:51,598 INFO L134 CoverageAnalysis]: Checked inductivity of 2175 backedges. 97 proven. 1 refuted. 0 times theorem prover too weak. 2077 trivial. 0 not checked. [2022-03-20 12:46:51,599 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:46:51,803 INFO L134 CoverageAnalysis]: Checked inductivity of 2175 backedges. 97 proven. 1 refuted. 0 times theorem prover too weak. 2077 trivial. 0 not checked. [2022-03-20 12:46:51,803 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1760489134] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:46:51,803 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:46:51,803 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 7, 7] total 38 [2022-03-20 12:46:51,804 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:46:51,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1865001591] [2022-03-20 12:46:51,804 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1865001591] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:46:51,804 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:46:51,804 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-03-20 12:46:51,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224247045] [2022-03-20 12:46:51,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:46:51,804 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-20 12:46:51,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:46:51,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-20 12:46:51,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=407, Invalid=999, Unknown=0, NotChecked=0, Total=1406 [2022-03-20 12:46:51,805 INFO L87 Difference]: Start difference. First operand 601 states and 852 transitions. Second operand has 30 states, 30 states have (on average 2.3666666666666667) internal successors, (71), 28 states have internal predecessors, (71), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 12:46:53,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:46:53,356 INFO L93 Difference]: Finished difference Result 1200 states and 1753 transitions. [2022-03-20 12:46:53,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-20 12:46:53,356 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3666666666666667) internal successors, (71), 28 states have internal predecessors, (71), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 197 [2022-03-20 12:46:53,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:46:53,358 INFO L225 Difference]: With dead ends: 1200 [2022-03-20 12:46:53,358 INFO L226 Difference]: Without dead ends: 656 [2022-03-20 12:46:53,360 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 454 GetRequests, 389 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 687 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1222, Invalid=3068, Unknown=0, NotChecked=0, Total=4290 [2022-03-20 12:46:53,360 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 1545 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 1390 mSolverCounterSat, 620 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1549 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 2010 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 620 IncrementalHoareTripleChecker+Valid, 1390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-20 12:46:53,360 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1549 Valid, 53 Invalid, 2010 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [620 Valid, 1390 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-20 12:46:53,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 656 states. [2022-03-20 12:46:53,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 656 to 624. [2022-03-20 12:46:53,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 624 states, 538 states have (on average 1.3475836431226766) internal successors, (725), 538 states have internal predecessors, (725), 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) [2022-03-20 12:46:53,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 624 states to 624 states and 885 transitions. [2022-03-20 12:46:53,479 INFO L78 Accepts]: Start accepts. Automaton has 624 states and 885 transitions. Word has length 197 [2022-03-20 12:46:53,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:46:53,479 INFO L478 AbstractCegarLoop]: Abstraction has 624 states and 885 transitions. [2022-03-20 12:46:53,479 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.3666666666666667) internal successors, (71), 28 states have internal predecessors, (71), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 12:46:53,479 INFO L276 IsEmpty]: Start isEmpty. Operand 624 states and 885 transitions. [2022-03-20 12:46:53,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2022-03-20 12:46:53,481 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:46:53,481 INFO L499 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:46:53,506 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-03-20 12:46:53,707 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-03-20 12:46:53,707 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:46:53,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:46:53,708 INFO L85 PathProgramCache]: Analyzing trace with hash 1485100375, now seen corresponding path program 49 times [2022-03-20 12:46:53,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:46:53,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1097957313] [2022-03-20 12:46:53,709 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:46:53,709 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:46:53,709 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:46:53,709 INFO L85 PathProgramCache]: Analyzing trace with hash 1485100375, now seen corresponding path program 50 times [2022-03-20 12:46:53,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:46:53,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588001317] [2022-03-20 12:46:53,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:46:53,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:46:53,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:46:54,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:46:54,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:46:54,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 189 [2022-03-20 12:46:54,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:46:54,215 INFO L134 CoverageAnalysis]: Checked inductivity of 2353 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 1677 trivial. 0 not checked. [2022-03-20 12:46:54,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:46:54,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588001317] [2022-03-20 12:46:54,215 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [588001317] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:46:54,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [53387977] [2022-03-20 12:46:54,215 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 12:46:54,215 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:46:54,216 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:46:54,217 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 12:46:54,231 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-03-20 12:46:54,443 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 12:46:54,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:46:54,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 786 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-20 12:46:54,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:46:54,726 INFO L134 CoverageAnalysis]: Checked inductivity of 2353 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 1677 trivial. 0 not checked. [2022-03-20 12:46:54,726 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:46:55,491 INFO L134 CoverageAnalysis]: Checked inductivity of 2353 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 1677 trivial. 0 not checked. [2022-03-20 12:46:55,491 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [53387977] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:46:55,491 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:46:55,491 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 29, 29] total 59 [2022-03-20 12:46:55,491 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:46:55,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1097957313] [2022-03-20 12:46:55,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1097957313] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:46:55,492 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:46:55,492 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-03-20 12:46:55,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6835507] [2022-03-20 12:46:55,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:46:55,492 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-20 12:46:55,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:46:55,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-20 12:46:55,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1600, Invalid=1822, Unknown=0, NotChecked=0, Total=3422 [2022-03-20 12:46:55,493 INFO L87 Difference]: Start difference. First operand 624 states and 885 transitions. Second operand has 31 states, 31 states have (on average 2.3548387096774195) internal successors, (73), 29 states have internal predecessors, (73), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 12:46:56,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:46:56,632 INFO L93 Difference]: Finished difference Result 1244 states and 1818 transitions. [2022-03-20 12:46:56,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-20 12:46:56,633 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.3548387096774195) internal successors, (73), 29 states have internal predecessors, (73), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 204 [2022-03-20 12:46:56,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:46:56,635 INFO L225 Difference]: With dead ends: 1244 [2022-03-20 12:46:56,635 INFO L226 Difference]: Without dead ends: 679 [2022-03-20 12:46:56,637 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 470 GetRequests, 384 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 613 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=3231, Invalid=4425, Unknown=0, NotChecked=0, Total=7656 [2022-03-20 12:46:56,637 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 1678 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 1367 mSolverCounterSat, 682 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1682 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 2049 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 682 IncrementalHoareTripleChecker+Valid, 1367 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-20 12:46:56,638 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1682 Valid, 47 Invalid, 2049 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [682 Valid, 1367 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-20 12:46:56,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 679 states. [2022-03-20 12:46:56,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 679 to 647. [2022-03-20 12:46:56,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 647 states, 558 states have (on average 1.3476702508960574) internal successors, (752), 558 states have internal predecessors, (752), 84 states have call successors, (84), 6 states have call predecessors, (84), 4 states have return successors, (82), 82 states have call predecessors, (82), 82 states have call successors, (82) [2022-03-20 12:46:56,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 647 states to 647 states and 918 transitions. [2022-03-20 12:46:56,768 INFO L78 Accepts]: Start accepts. Automaton has 647 states and 918 transitions. Word has length 204 [2022-03-20 12:46:56,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:46:56,768 INFO L478 AbstractCegarLoop]: Abstraction has 647 states and 918 transitions. [2022-03-20 12:46:56,768 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.3548387096774195) internal successors, (73), 29 states have internal predecessors, (73), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 12:46:56,768 INFO L276 IsEmpty]: Start isEmpty. Operand 647 states and 918 transitions. [2022-03-20 12:46:56,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2022-03-20 12:46:56,769 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:46:56,770 INFO L499 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:46:56,787 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2022-03-20 12:46:56,987 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-03-20 12:46:56,987 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:46:56,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:46:56,988 INFO L85 PathProgramCache]: Analyzing trace with hash -319846635, now seen corresponding path program 51 times [2022-03-20 12:46:56,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:46:56,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [760304901] [2022-03-20 12:46:56,989 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:46:56,989 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:46:56,989 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:46:56,989 INFO L85 PathProgramCache]: Analyzing trace with hash -319846635, now seen corresponding path program 52 times [2022-03-20 12:46:56,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:46:56,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052268856] [2022-03-20 12:46:56,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:46:56,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:46:57,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:46:57,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:46:57,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:46:57,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 196 [2022-03-20 12:46:57,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:46:57,327 INFO L134 CoverageAnalysis]: Checked inductivity of 2538 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 1809 trivial. 0 not checked. [2022-03-20 12:46:57,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:46:57,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052268856] [2022-03-20 12:46:57,327 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052268856] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:46:57,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914627755] [2022-03-20 12:46:57,327 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 12:46:57,327 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:46:57,328 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:46:57,329 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 12:46:57,330 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-03-20 12:46:57,511 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 12:46:57,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:46:57,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 812 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-20 12:46:57,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:46:57,662 INFO L134 CoverageAnalysis]: Checked inductivity of 2538 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 1809 trivial. 0 not checked. [2022-03-20 12:46:57,663 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:46:58,397 INFO L134 CoverageAnalysis]: Checked inductivity of 2538 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 1809 trivial. 0 not checked. [2022-03-20 12:46:58,397 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1914627755] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:46:58,397 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:46:58,397 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 30, 30] total 61 [2022-03-20 12:46:58,397 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:46:58,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [760304901] [2022-03-20 12:46:58,397 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [760304901] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:46:58,397 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:46:58,397 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-03-20 12:46:58,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281889402] [2022-03-20 12:46:58,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:46:58,398 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-20 12:46:58,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:46:58,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-20 12:46:58,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1715, Invalid=1945, Unknown=0, NotChecked=0, Total=3660 [2022-03-20 12:46:58,399 INFO L87 Difference]: Start difference. First operand 647 states and 918 transitions. Second operand has 32 states, 32 states have (on average 2.34375) internal successors, (75), 30 states have internal predecessors, (75), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 12:46:59,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:46:59,814 INFO L93 Difference]: Finished difference Result 1288 states and 1883 transitions. [2022-03-20 12:46:59,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-20 12:46:59,815 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.34375) internal successors, (75), 30 states have internal predecessors, (75), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 211 [2022-03-20 12:46:59,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:46:59,817 INFO L225 Difference]: With dead ends: 1288 [2022-03-20 12:46:59,817 INFO L226 Difference]: Without dead ends: 702 [2022-03-20 12:46:59,818 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 486 GetRequests, 397 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 650 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=3462, Invalid=4728, Unknown=0, NotChecked=0, Total=8190 [2022-03-20 12:46:59,819 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 1581 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 1762 mSolverCounterSat, 675 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1585 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 2437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 675 IncrementalHoareTripleChecker+Valid, 1762 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-20 12:46:59,819 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1585 Valid, 51 Invalid, 2437 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [675 Valid, 1762 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-20 12:46:59,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 702 states. [2022-03-20 12:46:59,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 702 to 670. [2022-03-20 12:46:59,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 670 states, 578 states have (on average 1.3477508650519032) internal successors, (779), 578 states have internal predecessors, (779), 87 states have call successors, (87), 6 states have call predecessors, (87), 4 states have return successors, (85), 85 states have call predecessors, (85), 85 states have call successors, (85) [2022-03-20 12:46:59,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 670 states to 670 states and 951 transitions. [2022-03-20 12:46:59,950 INFO L78 Accepts]: Start accepts. Automaton has 670 states and 951 transitions. Word has length 211 [2022-03-20 12:46:59,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:46:59,950 INFO L478 AbstractCegarLoop]: Abstraction has 670 states and 951 transitions. [2022-03-20 12:46:59,950 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.34375) internal successors, (75), 30 states have internal predecessors, (75), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 12:46:59,950 INFO L276 IsEmpty]: Start isEmpty. Operand 670 states and 951 transitions. [2022-03-20 12:46:59,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2022-03-20 12:46:59,952 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:46:59,952 INFO L499 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:46:59,970 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-03-20 12:47:00,167 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:47:00,167 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:47:00,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:47:00,168 INFO L85 PathProgramCache]: Analyzing trace with hash -993676261, now seen corresponding path program 53 times [2022-03-20 12:47:00,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:47:00,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1282426693] [2022-03-20 12:47:00,169 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:47:00,169 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:47:00,169 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:47:00,169 INFO L85 PathProgramCache]: Analyzing trace with hash -993676261, now seen corresponding path program 54 times [2022-03-20 12:47:00,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:47:00,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598013419] [2022-03-20 12:47:00,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:47:00,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:47:00,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:47:00,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:47:00,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:47:00,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 203 [2022-03-20 12:47:00,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:47:00,552 INFO L134 CoverageAnalysis]: Checked inductivity of 2730 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 1946 trivial. 0 not checked. [2022-03-20 12:47:00,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:47:00,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598013419] [2022-03-20 12:47:00,552 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598013419] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:47:00,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605682272] [2022-03-20 12:47:00,552 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 12:47:00,552 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:47:00,553 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:47:00,553 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 12:47:00,567 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-03-20 12:47:00,735 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 12:47:00,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:47:00,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 12:47:00,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:47:01,000 INFO L134 CoverageAnalysis]: Checked inductivity of 2730 backedges. 109 proven. 1 refuted. 0 times theorem prover too weak. 2620 trivial. 0 not checked. [2022-03-20 12:47:01,000 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:47:01,312 INFO L134 CoverageAnalysis]: Checked inductivity of 2730 backedges. 109 proven. 1 refuted. 0 times theorem prover too weak. 2620 trivial. 0 not checked. [2022-03-20 12:47:01,312 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [605682272] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:47:01,312 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:47:01,313 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 7, 7] total 41 [2022-03-20 12:47:01,313 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:47:01,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1282426693] [2022-03-20 12:47:01,313 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1282426693] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:47:01,313 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:47:01,313 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-03-20 12:47:01,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859684496] [2022-03-20 12:47:01,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:47:01,314 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-20 12:47:01,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:47:01,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-20 12:47:01,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=494, Invalid=1146, Unknown=0, NotChecked=0, Total=1640 [2022-03-20 12:47:01,315 INFO L87 Difference]: Start difference. First operand 670 states and 951 transitions. Second operand has 33 states, 33 states have (on average 2.3333333333333335) internal successors, (77), 31 states have internal predecessors, (77), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 12:47:02,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:47:02,721 INFO L93 Difference]: Finished difference Result 1332 states and 1948 transitions. [2022-03-20 12:47:02,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-20 12:47:02,721 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.3333333333333335) internal successors, (77), 31 states have internal predecessors, (77), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 218 [2022-03-20 12:47:02,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:47:02,724 INFO L225 Difference]: With dead ends: 1332 [2022-03-20 12:47:02,724 INFO L226 Difference]: Without dead ends: 725 [2022-03-20 12:47:02,726 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 502 GetRequests, 431 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 810 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1489, Invalid=3623, Unknown=0, NotChecked=0, Total=5112 [2022-03-20 12:47:02,727 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 1726 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 1555 mSolverCounterSat, 769 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1730 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 2324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 769 IncrementalHoareTripleChecker+Valid, 1555 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-20 12:47:02,727 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1730 Valid, 45 Invalid, 2324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [769 Valid, 1555 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-20 12:47:02,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 725 states. [2022-03-20 12:47:02,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 725 to 693. [2022-03-20 12:47:02,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 693 states, 598 states have (on average 1.3478260869565217) internal successors, (806), 598 states have internal predecessors, (806), 90 states have call successors, (90), 6 states have call predecessors, (90), 4 states have return successors, (88), 88 states have call predecessors, (88), 88 states have call successors, (88) [2022-03-20 12:47:02,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 693 states to 693 states and 984 transitions. [2022-03-20 12:47:02,891 INFO L78 Accepts]: Start accepts. Automaton has 693 states and 984 transitions. Word has length 218 [2022-03-20 12:47:02,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:47:02,892 INFO L478 AbstractCegarLoop]: Abstraction has 693 states and 984 transitions. [2022-03-20 12:47:02,892 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.3333333333333335) internal successors, (77), 31 states have internal predecessors, (77), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 12:47:02,892 INFO L276 IsEmpty]: Start isEmpty. Operand 693 states and 984 transitions. [2022-03-20 12:47:02,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2022-03-20 12:47:02,893 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:47:02,893 INFO L499 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:47:02,911 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-03-20 12:47:03,110 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:47:03,111 INFO L403 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:47:03,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:47:03,111 INFO L85 PathProgramCache]: Analyzing trace with hash 611120721, now seen corresponding path program 55 times [2022-03-20 12:47:03,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:47:03,111 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1159817104] [2022-03-20 12:47:03,112 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:47:03,112 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:47:03,112 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:47:03,112 INFO L85 PathProgramCache]: Analyzing trace with hash 611120721, now seen corresponding path program 56 times [2022-03-20 12:47:03,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:47:03,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948962197] [2022-03-20 12:47:03,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:47:03,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:47:03,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:47:03,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:47:03,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:47:03,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 210 [2022-03-20 12:47:03,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:47:03,507 INFO L134 CoverageAnalysis]: Checked inductivity of 2929 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 2088 trivial. 0 not checked. [2022-03-20 12:47:03,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:47:03,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948962197] [2022-03-20 12:47:03,508 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948962197] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:47:03,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270282391] [2022-03-20 12:47:03,508 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 12:47:03,508 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:47:03,508 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:47:03,509 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 12:47:03,510 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-03-20 12:47:03,750 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 12:47:03,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:47:03,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 864 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-20 12:47:03,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:47:03,989 INFO L134 CoverageAnalysis]: Checked inductivity of 2929 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 2088 trivial. 0 not checked. [2022-03-20 12:47:03,990 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:47:04,945 INFO L134 CoverageAnalysis]: Checked inductivity of 2929 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 2088 trivial. 0 not checked. [2022-03-20 12:47:04,945 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1270282391] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:47:04,945 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:47:04,945 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 32, 32] total 65 [2022-03-20 12:47:04,945 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:47:04,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1159817104] [2022-03-20 12:47:04,945 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1159817104] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:47:04,945 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:47:04,946 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-03-20 12:47:04,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197792433] [2022-03-20 12:47:04,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:47:04,946 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-03-20 12:47:04,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:47:04,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-03-20 12:47:04,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1957, Invalid=2203, Unknown=0, NotChecked=0, Total=4160 [2022-03-20 12:47:04,947 INFO L87 Difference]: Start difference. First operand 693 states and 984 transitions. Second operand has 34 states, 34 states have (on average 2.323529411764706) internal successors, (79), 32 states have internal predecessors, (79), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 12:47:06,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:47:06,391 INFO L93 Difference]: Finished difference Result 1376 states and 2013 transitions. [2022-03-20 12:47:06,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-20 12:47:06,392 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.323529411764706) internal successors, (79), 32 states have internal predecessors, (79), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 225 [2022-03-20 12:47:06,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:47:06,394 INFO L225 Difference]: With dead ends: 1376 [2022-03-20 12:47:06,394 INFO L226 Difference]: Without dead ends: 748 [2022-03-20 12:47:06,396 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 518 GetRequests, 423 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 727 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=3948, Invalid=5364, Unknown=0, NotChecked=0, Total=9312 [2022-03-20 12:47:06,396 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 1750 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 1666 mSolverCounterSat, 793 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1754 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 2459 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 793 IncrementalHoareTripleChecker+Valid, 1666 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-20 12:47:06,396 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1754 Valid, 47 Invalid, 2459 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [793 Valid, 1666 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-20 12:47:06,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 748 states. [2022-03-20 12:47:06,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 748 to 716. [2022-03-20 12:47:06,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 716 states, 618 states have (on average 1.3478964401294498) internal successors, (833), 618 states have internal predecessors, (833), 93 states have call successors, (93), 6 states have call predecessors, (93), 4 states have return successors, (91), 91 states have call predecessors, (91), 91 states have call successors, (91) [2022-03-20 12:47:06,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 716 states to 716 states and 1017 transitions. [2022-03-20 12:47:06,574 INFO L78 Accepts]: Start accepts. Automaton has 716 states and 1017 transitions. Word has length 225 [2022-03-20 12:47:06,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:47:06,575 INFO L478 AbstractCegarLoop]: Abstraction has 716 states and 1017 transitions. [2022-03-20 12:47:06,575 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.323529411764706) internal successors, (79), 32 states have internal predecessors, (79), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 12:47:06,575 INFO L276 IsEmpty]: Start isEmpty. Operand 716 states and 1017 transitions. [2022-03-20 12:47:06,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2022-03-20 12:47:06,577 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:47:06,577 INFO L499 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:47:06,613 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-03-20 12:47:06,795 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:47:06,796 INFO L403 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:47:06,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:47:06,796 INFO L85 PathProgramCache]: Analyzing trace with hash 144819935, now seen corresponding path program 57 times [2022-03-20 12:47:06,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:47:06,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1357587608] [2022-03-20 12:47:06,797 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:47:06,798 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:47:06,798 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:47:06,798 INFO L85 PathProgramCache]: Analyzing trace with hash 144819935, now seen corresponding path program 58 times [2022-03-20 12:47:06,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:47:06,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022325246] [2022-03-20 12:47:06,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:47:06,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:47:06,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:47:07,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:47:07,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:47:07,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 217 [2022-03-20 12:47:07,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:47:07,212 INFO L134 CoverageAnalysis]: Checked inductivity of 3135 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 2235 trivial. 0 not checked. [2022-03-20 12:47:07,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:47:07,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022325246] [2022-03-20 12:47:07,213 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022325246] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:47:07,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [150341194] [2022-03-20 12:47:07,213 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 12:47:07,213 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:47:07,213 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:47:07,214 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 12:47:07,215 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-03-20 12:47:07,470 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 12:47:07,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:47:07,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 890 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-20 12:47:07,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:47:07,779 INFO L134 CoverageAnalysis]: Checked inductivity of 3135 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 2235 trivial. 0 not checked. [2022-03-20 12:47:07,779 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:47:08,693 INFO L134 CoverageAnalysis]: Checked inductivity of 3135 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 2235 trivial. 0 not checked. [2022-03-20 12:47:08,694 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [150341194] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:47:08,694 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:47:08,694 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 33, 33] total 67 [2022-03-20 12:47:08,694 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:47:08,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1357587608] [2022-03-20 12:47:08,694 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1357587608] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:47:08,694 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:47:08,694 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-03-20 12:47:08,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62680229] [2022-03-20 12:47:08,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:47:08,695 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-20 12:47:08,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:47:08,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-20 12:47:08,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2084, Invalid=2338, Unknown=0, NotChecked=0, Total=4422 [2022-03-20 12:47:08,696 INFO L87 Difference]: Start difference. First operand 716 states and 1017 transitions. Second operand has 35 states, 35 states have (on average 2.3142857142857145) internal successors, (81), 33 states have internal predecessors, (81), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 12:47:10,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:47:10,343 INFO L93 Difference]: Finished difference Result 1420 states and 2078 transitions. [2022-03-20 12:47:10,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-03-20 12:47:10,344 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.3142857142857145) internal successors, (81), 33 states have internal predecessors, (81), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 232 [2022-03-20 12:47:10,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:47:10,346 INFO L225 Difference]: With dead ends: 1420 [2022-03-20 12:47:10,346 INFO L226 Difference]: Without dead ends: 771 [2022-03-20 12:47:10,348 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 534 GetRequests, 436 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 767 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=4203, Invalid=5697, Unknown=0, NotChecked=0, Total=9900 [2022-03-20 12:47:10,348 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 1776 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 2009 mSolverCounterSat, 870 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1780 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 2879 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 870 IncrementalHoareTripleChecker+Valid, 2009 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-20 12:47:10,349 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1780 Valid, 49 Invalid, 2879 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [870 Valid, 2009 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-20 12:47:10,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 771 states. [2022-03-20 12:47:10,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 771 to 739. [2022-03-20 12:47:10,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 739 states, 638 states have (on average 1.347962382445141) internal successors, (860), 638 states have internal predecessors, (860), 96 states have call successors, (96), 6 states have call predecessors, (96), 4 states have return successors, (94), 94 states have call predecessors, (94), 94 states have call successors, (94) [2022-03-20 12:47:10,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 739 states to 739 states and 1050 transitions. [2022-03-20 12:47:10,542 INFO L78 Accepts]: Start accepts. Automaton has 739 states and 1050 transitions. Word has length 232 [2022-03-20 12:47:10,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:47:10,542 INFO L478 AbstractCegarLoop]: Abstraction has 739 states and 1050 transitions. [2022-03-20 12:47:10,542 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.3142857142857145) internal successors, (81), 33 states have internal predecessors, (81), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 12:47:10,542 INFO L276 IsEmpty]: Start isEmpty. Operand 739 states and 1050 transitions. [2022-03-20 12:47:10,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2022-03-20 12:47:10,544 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:47:10,544 INFO L499 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:47:10,565 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-03-20 12:47:10,751 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2022-03-20 12:47:10,752 INFO L403 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:47:10,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:47:10,752 INFO L85 PathProgramCache]: Analyzing trace with hash -1620078195, now seen corresponding path program 59 times [2022-03-20 12:47:10,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:47:10,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [642547499] [2022-03-20 12:47:10,753 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:47:10,753 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:47:10,754 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:47:10,754 INFO L85 PathProgramCache]: Analyzing trace with hash -1620078195, now seen corresponding path program 60 times [2022-03-20 12:47:10,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:47:10,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982414790] [2022-03-20 12:47:10,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:47:10,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:47:10,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:47:11,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:47:11,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:47:11,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 224 [2022-03-20 12:47:11,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:47:11,070 INFO L134 CoverageAnalysis]: Checked inductivity of 3348 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 2387 trivial. 0 not checked. [2022-03-20 12:47:11,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:47:11,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982414790] [2022-03-20 12:47:11,070 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982414790] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:47:11,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949905918] [2022-03-20 12:47:11,070 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 12:47:11,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:47:11,071 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:47:11,072 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 12:47:11,072 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-03-20 12:47:11,270 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 12:47:11,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:47:11,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 12:47:11,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:47:11,564 INFO L134 CoverageAnalysis]: Checked inductivity of 3348 backedges. 121 proven. 1 refuted. 0 times theorem prover too weak. 3226 trivial. 0 not checked. [2022-03-20 12:47:11,565 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:47:11,889 INFO L134 CoverageAnalysis]: Checked inductivity of 3348 backedges. 121 proven. 1 refuted. 0 times theorem prover too weak. 3226 trivial. 0 not checked. [2022-03-20 12:47:11,889 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [949905918] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:47:11,889 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:47:11,890 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 7, 7] total 44 [2022-03-20 12:47:11,890 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:47:11,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [642547499] [2022-03-20 12:47:11,890 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [642547499] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:47:11,890 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:47:11,890 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-03-20 12:47:11,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837634718] [2022-03-20 12:47:11,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:47:11,890 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-03-20 12:47:11,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:47:11,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-03-20 12:47:11,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=590, Invalid=1302, Unknown=0, NotChecked=0, Total=1892 [2022-03-20 12:47:11,891 INFO L87 Difference]: Start difference. First operand 739 states and 1050 transitions. Second operand has 36 states, 36 states have (on average 2.3055555555555554) internal successors, (83), 34 states have internal predecessors, (83), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 12:47:13,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:47:13,490 INFO L93 Difference]: Finished difference Result 1464 states and 2143 transitions. [2022-03-20 12:47:13,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-20 12:47:13,490 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.3055555555555554) internal successors, (83), 34 states have internal predecessors, (83), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 239 [2022-03-20 12:47:13,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:47:13,494 INFO L225 Difference]: With dead ends: 1464 [2022-03-20 12:47:13,494 INFO L226 Difference]: Without dead ends: 794 [2022-03-20 12:47:13,496 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 550 GetRequests, 473 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 942 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1783, Invalid=4223, Unknown=0, NotChecked=0, Total=6006 [2022-03-20 12:47:13,496 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 1851 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 1915 mSolverCounterSat, 804 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1855 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 2719 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 804 IncrementalHoareTripleChecker+Valid, 1915 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-20 12:47:13,497 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1855 Valid, 51 Invalid, 2719 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [804 Valid, 1915 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-20 12:47:13,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 794 states. [2022-03-20 12:47:13,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 794 to 762. [2022-03-20 12:47:13,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 762 states, 658 states have (on average 1.3480243161094225) internal successors, (887), 658 states have internal predecessors, (887), 99 states have call successors, (99), 6 states have call predecessors, (99), 4 states have return successors, (97), 97 states have call predecessors, (97), 97 states have call successors, (97) [2022-03-20 12:47:13,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 762 states to 762 states and 1083 transitions. [2022-03-20 12:47:13,741 INFO L78 Accepts]: Start accepts. Automaton has 762 states and 1083 transitions. Word has length 239 [2022-03-20 12:47:13,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:47:13,742 INFO L478 AbstractCegarLoop]: Abstraction has 762 states and 1083 transitions. [2022-03-20 12:47:13,742 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.3055555555555554) internal successors, (83), 34 states have internal predecessors, (83), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 12:47:13,742 INFO L276 IsEmpty]: Start isEmpty. Operand 762 states and 1083 transitions. [2022-03-20 12:47:13,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2022-03-20 12:47:13,743 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:47:13,744 INFO L499 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:47:13,764 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-03-20 12:47:13,961 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:47:13,962 INFO L403 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:47:13,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:47:13,962 INFO L85 PathProgramCache]: Analyzing trace with hash 91770275, now seen corresponding path program 61 times [2022-03-20 12:47:13,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:47:13,962 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1232841551] [2022-03-20 12:47:13,964 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:47:13,964 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:47:13,964 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:47:13,964 INFO L85 PathProgramCache]: Analyzing trace with hash 91770275, now seen corresponding path program 62 times [2022-03-20 12:47:13,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:47:13,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111519722] [2022-03-20 12:47:13,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:47:13,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:47:13,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:47:14,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:47:14,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:47:14,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 231 [2022-03-20 12:47:14,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:47:14,384 INFO L134 CoverageAnalysis]: Checked inductivity of 3568 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 2544 trivial. 0 not checked. [2022-03-20 12:47:14,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:47:14,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111519722] [2022-03-20 12:47:14,385 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111519722] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:47:14,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1693621543] [2022-03-20 12:47:14,385 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 12:47:14,385 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:47:14,385 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:47:14,386 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 12:47:14,387 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-03-20 12:47:14,643 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 12:47:14,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:47:14,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 942 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-20 12:47:14,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:47:14,938 INFO L134 CoverageAnalysis]: Checked inductivity of 3568 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 2544 trivial. 0 not checked. [2022-03-20 12:47:14,939 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:47:15,740 INFO L134 CoverageAnalysis]: Checked inductivity of 3568 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 2544 trivial. 0 not checked. [2022-03-20 12:47:15,740 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1693621543] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:47:15,740 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:47:15,741 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 35, 35] total 71 [2022-03-20 12:47:15,741 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:47:15,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1232841551] [2022-03-20 12:47:15,741 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1232841551] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:47:15,741 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:47:15,741 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-03-20 12:47:15,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318582764] [2022-03-20 12:47:15,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:47:15,741 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-03-20 12:47:15,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:47:15,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-03-20 12:47:15,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2350, Invalid=2620, Unknown=0, NotChecked=0, Total=4970 [2022-03-20 12:47:15,743 INFO L87 Difference]: Start difference. First operand 762 states and 1083 transitions. Second operand has 37 states, 37 states have (on average 2.2972972972972974) internal successors, (85), 35 states have internal predecessors, (85), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 12:47:17,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:47:17,352 INFO L93 Difference]: Finished difference Result 1508 states and 2208 transitions. [2022-03-20 12:47:17,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-20 12:47:17,352 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.2972972972972974) internal successors, (85), 35 states have internal predecessors, (85), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 246 [2022-03-20 12:47:17,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:47:17,363 INFO L225 Difference]: With dead ends: 1508 [2022-03-20 12:47:17,363 INFO L226 Difference]: Without dead ends: 817 [2022-03-20 12:47:17,364 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 566 GetRequests, 462 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 850 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=4737, Invalid=6393, Unknown=0, NotChecked=0, Total=11130 [2022-03-20 12:47:17,365 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 1897 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 1971 mSolverCounterSat, 865 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1901 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 2836 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 865 IncrementalHoareTripleChecker+Valid, 1971 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-20 12:47:17,365 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1901 Valid, 51 Invalid, 2836 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [865 Valid, 1971 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-20 12:47:17,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 817 states. [2022-03-20 12:47:17,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 817 to 785. [2022-03-20 12:47:17,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 785 states, 678 states have (on average 1.3480825958702065) internal successors, (914), 678 states have internal predecessors, (914), 102 states have call successors, (102), 6 states have call predecessors, (102), 4 states have return successors, (100), 100 states have call predecessors, (100), 100 states have call successors, (100) [2022-03-20 12:47:17,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 785 states to 785 states and 1116 transitions. [2022-03-20 12:47:17,550 INFO L78 Accepts]: Start accepts. Automaton has 785 states and 1116 transitions. Word has length 246 [2022-03-20 12:47:17,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:47:17,550 INFO L478 AbstractCegarLoop]: Abstraction has 785 states and 1116 transitions. [2022-03-20 12:47:17,550 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.2972972972972974) internal successors, (85), 35 states have internal predecessors, (85), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 12:47:17,551 INFO L276 IsEmpty]: Start isEmpty. Operand 785 states and 1116 transitions. [2022-03-20 12:47:17,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2022-03-20 12:47:17,552 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:47:17,552 INFO L499 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:47:17,572 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-03-20 12:47:17,767 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:47:17,767 INFO L403 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:47:17,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:47:17,768 INFO L85 PathProgramCache]: Analyzing trace with hash 1490557129, now seen corresponding path program 63 times [2022-03-20 12:47:17,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:47:17,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1389937466] [2022-03-20 12:47:17,769 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:47:17,769 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:47:17,769 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:47:17,769 INFO L85 PathProgramCache]: Analyzing trace with hash 1490557129, now seen corresponding path program 64 times [2022-03-20 12:47:17,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:47:17,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293248643] [2022-03-20 12:47:17,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:47:17,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:47:17,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:47:18,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:47:18,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:47:18,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 238 [2022-03-20 12:47:18,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:47:18,254 INFO L134 CoverageAnalysis]: Checked inductivity of 3795 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 2706 trivial. 0 not checked. [2022-03-20 12:47:18,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:47:18,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293248643] [2022-03-20 12:47:18,255 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293248643] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:47:18,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30977793] [2022-03-20 12:47:18,255 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 12:47:18,255 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:47:18,255 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:47:18,256 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 12:47:18,257 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-03-20 12:47:18,454 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 12:47:18,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:47:18,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 968 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-20 12:47:18,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:47:18,838 INFO L134 CoverageAnalysis]: Checked inductivity of 3795 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 2706 trivial. 0 not checked. [2022-03-20 12:47:18,839 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:47:20,307 INFO L134 CoverageAnalysis]: Checked inductivity of 3795 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 2706 trivial. 0 not checked. [2022-03-20 12:47:20,307 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [30977793] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:47:20,307 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:47:20,307 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 36, 36] total 73 [2022-03-20 12:47:20,308 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:47:20,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1389937466] [2022-03-20 12:47:20,308 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1389937466] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:47:20,308 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:47:20,308 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-03-20 12:47:20,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403761563] [2022-03-20 12:47:20,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:47:20,308 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-03-20 12:47:20,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:47:20,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-03-20 12:47:20,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2489, Invalid=2767, Unknown=0, NotChecked=0, Total=5256 [2022-03-20 12:47:20,309 INFO L87 Difference]: Start difference. First operand 785 states and 1116 transitions. Second operand has 38 states, 38 states have (on average 2.289473684210526) internal successors, (87), 36 states have internal predecessors, (87), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 12:47:22,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:47:22,540 INFO L93 Difference]: Finished difference Result 1552 states and 2273 transitions. [2022-03-20 12:47:22,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-20 12:47:22,540 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.289473684210526) internal successors, (87), 36 states have internal predecessors, (87), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 253 [2022-03-20 12:47:22,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:47:22,543 INFO L225 Difference]: With dead ends: 1552 [2022-03-20 12:47:22,544 INFO L226 Difference]: Without dead ends: 840 [2022-03-20 12:47:22,545 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 582 GetRequests, 475 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 893 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=5016, Invalid=6756, Unknown=0, NotChecked=0, Total=11772 [2022-03-20 12:47:22,556 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 2100 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 1881 mSolverCounterSat, 928 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2104 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 2809 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 928 IncrementalHoareTripleChecker+Valid, 1881 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-20 12:47:22,556 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2104 Valid, 49 Invalid, 2809 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [928 Valid, 1881 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-03-20 12:47:22,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 840 states. [2022-03-20 12:47:22,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 840 to 808. [2022-03-20 12:47:22,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 808 states, 698 states have (on average 1.348137535816619) internal successors, (941), 698 states have internal predecessors, (941), 105 states have call successors, (105), 6 states have call predecessors, (105), 4 states have return successors, (103), 103 states have call predecessors, (103), 103 states have call successors, (103) [2022-03-20 12:47:22,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 808 states to 808 states and 1149 transitions. [2022-03-20 12:47:22,888 INFO L78 Accepts]: Start accepts. Automaton has 808 states and 1149 transitions. Word has length 253 [2022-03-20 12:47:22,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:47:22,888 INFO L478 AbstractCegarLoop]: Abstraction has 808 states and 1149 transitions. [2022-03-20 12:47:22,888 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.289473684210526) internal successors, (87), 36 states have internal predecessors, (87), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 12:47:22,888 INFO L276 IsEmpty]: Start isEmpty. Operand 808 states and 1149 transitions. [2022-03-20 12:47:22,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2022-03-20 12:47:22,890 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:47:22,890 INFO L499 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:47:22,910 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-03-20 12:47:23,096 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-03-20 12:47:23,096 INFO L403 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:47:23,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:47:23,097 INFO L85 PathProgramCache]: Analyzing trace with hash -1926723481, now seen corresponding path program 65 times [2022-03-20 12:47:23,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:47:23,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2064479308] [2022-03-20 12:47:23,098 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:47:23,098 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:47:23,098 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:47:23,098 INFO L85 PathProgramCache]: Analyzing trace with hash -1926723481, now seen corresponding path program 66 times [2022-03-20 12:47:23,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:47:23,099 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506090478] [2022-03-20 12:47:23,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:47:23,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:47:23,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:47:23,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:47:23,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:47:23,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 245 [2022-03-20 12:47:23,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:47:23,687 INFO L134 CoverageAnalysis]: Checked inductivity of 4029 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 2873 trivial. 0 not checked. [2022-03-20 12:47:23,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:47:23,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506090478] [2022-03-20 12:47:23,688 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506090478] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:47:23,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714558758] [2022-03-20 12:47:23,688 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 12:47:23,688 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:47:23,688 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:47:23,689 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 12:47:23,690 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-03-20 12:47:23,901 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 12:47:23,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:47:23,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 12:47:23,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:47:24,373 INFO L134 CoverageAnalysis]: Checked inductivity of 4029 backedges. 133 proven. 1 refuted. 0 times theorem prover too weak. 3895 trivial. 0 not checked. [2022-03-20 12:47:24,373 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:47:24,726 INFO L134 CoverageAnalysis]: Checked inductivity of 4029 backedges. 133 proven. 1 refuted. 0 times theorem prover too weak. 3895 trivial. 0 not checked. [2022-03-20 12:47:24,726 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1714558758] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:47:24,726 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:47:24,726 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 7, 7] total 47 [2022-03-20 12:47:24,727 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:47:24,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2064479308] [2022-03-20 12:47:24,727 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2064479308] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:47:24,727 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:47:24,727 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2022-03-20 12:47:24,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680071412] [2022-03-20 12:47:24,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:47:24,727 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-03-20 12:47:24,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:47:24,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-03-20 12:47:24,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=695, Invalid=1467, Unknown=0, NotChecked=0, Total=2162 [2022-03-20 12:47:24,728 INFO L87 Difference]: Start difference. First operand 808 states and 1149 transitions. Second operand has 39 states, 39 states have (on average 2.282051282051282) internal successors, (89), 37 states have internal predecessors, (89), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 12:47:26,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:47:26,848 INFO L93 Difference]: Finished difference Result 1596 states and 2338 transitions. [2022-03-20 12:47:26,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-03-20 12:47:26,848 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.282051282051282) internal successors, (89), 37 states have internal predecessors, (89), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 260 [2022-03-20 12:47:26,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:47:26,851 INFO L225 Difference]: With dead ends: 1596 [2022-03-20 12:47:26,851 INFO L226 Difference]: Without dead ends: 863 [2022-03-20 12:47:26,852 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 598 GetRequests, 515 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1083 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2104, Invalid=4868, Unknown=0, NotChecked=0, Total=6972 [2022-03-20 12:47:26,852 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 2111 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 1849 mSolverCounterSat, 887 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2115 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 2736 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 887 IncrementalHoareTripleChecker+Valid, 1849 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-20 12:47:26,853 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2115 Valid, 51 Invalid, 2736 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [887 Valid, 1849 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-03-20 12:47:26,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 863 states. [2022-03-20 12:47:27,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 863 to 831. [2022-03-20 12:47:27,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 831 states, 718 states have (on average 1.3481894150417828) internal successors, (968), 718 states have internal predecessors, (968), 108 states have call successors, (108), 6 states have call predecessors, (108), 4 states have return successors, (106), 106 states have call predecessors, (106), 106 states have call successors, (106) [2022-03-20 12:47:27,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 831 states to 831 states and 1182 transitions. [2022-03-20 12:47:27,049 INFO L78 Accepts]: Start accepts. Automaton has 831 states and 1182 transitions. Word has length 260 [2022-03-20 12:47:27,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:47:27,049 INFO L478 AbstractCegarLoop]: Abstraction has 831 states and 1182 transitions. [2022-03-20 12:47:27,050 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.282051282051282) internal successors, (89), 37 states have internal predecessors, (89), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 12:47:27,050 INFO L276 IsEmpty]: Start isEmpty. Operand 831 states and 1182 transitions. [2022-03-20 12:47:27,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2022-03-20 12:47:27,051 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:47:27,052 INFO L499 BasicCegarLoop]: trace histogram [35, 35, 35, 35, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:47:27,070 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-03-20 12:47:27,268 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-03-20 12:47:27,268 INFO L403 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:47:27,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:47:27,268 INFO L85 PathProgramCache]: Analyzing trace with hash -1996010491, now seen corresponding path program 67 times [2022-03-20 12:47:27,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:47:27,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1398264311] [2022-03-20 12:47:27,270 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:47:27,270 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:47:27,270 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:47:27,270 INFO L85 PathProgramCache]: Analyzing trace with hash -1996010491, now seen corresponding path program 68 times [2022-03-20 12:47:27,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:47:27,270 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939713722] [2022-03-20 12:47:27,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:47:27,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:47:27,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:47:27,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:47:27,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:47:27,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 252 [2022-03-20 12:47:27,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:47:27,814 INFO L134 CoverageAnalysis]: Checked inductivity of 4270 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 3045 trivial. 0 not checked. [2022-03-20 12:47:27,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:47:27,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939713722] [2022-03-20 12:47:27,814 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939713722] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:47:27,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1676182751] [2022-03-20 12:47:27,815 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 12:47:27,815 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:47:27,815 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:47:27,816 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 12:47:27,817 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-03-20 12:47:28,127 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 12:47:28,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:47:28,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 1020 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-20 12:47:28,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:47:28,450 INFO L134 CoverageAnalysis]: Checked inductivity of 4270 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 3045 trivial. 0 not checked. [2022-03-20 12:47:28,451 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:47:29,976 INFO L134 CoverageAnalysis]: Checked inductivity of 4270 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 3045 trivial. 0 not checked. [2022-03-20 12:47:29,977 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1676182751] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:47:29,977 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:47:29,977 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 38, 38] total 77 [2022-03-20 12:47:29,977 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:47:29,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1398264311] [2022-03-20 12:47:29,977 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1398264311] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:47:29,977 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:47:29,977 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2022-03-20 12:47:29,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730618510] [2022-03-20 12:47:29,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:47:29,978 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-03-20 12:47:29,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:47:29,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-03-20 12:47:29,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2779, Invalid=3073, Unknown=0, NotChecked=0, Total=5852 [2022-03-20 12:47:29,979 INFO L87 Difference]: Start difference. First operand 831 states and 1182 transitions. Second operand has 40 states, 40 states have (on average 2.275) internal successors, (91), 38 states have internal predecessors, (91), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 12:47:32,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:47:32,007 INFO L93 Difference]: Finished difference Result 1640 states and 2403 transitions. [2022-03-20 12:47:32,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-03-20 12:47:32,007 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.275) internal successors, (91), 38 states have internal predecessors, (91), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 267 [2022-03-20 12:47:32,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:47:32,010 INFO L225 Difference]: With dead ends: 1640 [2022-03-20 12:47:32,010 INFO L226 Difference]: Without dead ends: 886 [2022-03-20 12:47:32,012 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 614 GetRequests, 501 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 982 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=5598, Invalid=7512, Unknown=0, NotChecked=0, Total=13110 [2022-03-20 12:47:32,012 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 2154 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 2018 mSolverCounterSat, 926 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2158 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 2944 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 926 IncrementalHoareTripleChecker+Valid, 2018 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-20 12:47:32,012 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2158 Valid, 53 Invalid, 2944 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [926 Valid, 2018 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-20 12:47:32,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 886 states. [2022-03-20 12:47:32,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 886 to 854. [2022-03-20 12:47:32,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 854 states, 738 states have (on average 1.348238482384824) internal successors, (995), 738 states have internal predecessors, (995), 111 states have call successors, (111), 6 states have call predecessors, (111), 4 states have return successors, (109), 109 states have call predecessors, (109), 109 states have call successors, (109) [2022-03-20 12:47:32,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 854 states to 854 states and 1215 transitions. [2022-03-20 12:47:32,237 INFO L78 Accepts]: Start accepts. Automaton has 854 states and 1215 transitions. Word has length 267 [2022-03-20 12:47:32,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:47:32,237 INFO L478 AbstractCegarLoop]: Abstraction has 854 states and 1215 transitions. [2022-03-20 12:47:32,237 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.275) internal successors, (91), 38 states have internal predecessors, (91), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 12:47:32,237 INFO L276 IsEmpty]: Start isEmpty. Operand 854 states and 1215 transitions. [2022-03-20 12:47:32,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 275 [2022-03-20 12:47:32,239 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:47:32,239 INFO L499 BasicCegarLoop]: trace histogram [36, 36, 36, 36, 36, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:47:32,266 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-03-20 12:47:32,439 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-03-20 12:47:32,439 INFO L403 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:47:32,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:47:32,440 INFO L85 PathProgramCache]: Analyzing trace with hash 101824299, now seen corresponding path program 69 times [2022-03-20 12:47:32,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:47:32,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [218173224] [2022-03-20 12:47:32,441 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:47:32,441 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:47:32,441 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:47:32,441 INFO L85 PathProgramCache]: Analyzing trace with hash 101824299, now seen corresponding path program 70 times [2022-03-20 12:47:32,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:47:32,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68550041] [2022-03-20 12:47:32,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:47:32,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:47:32,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:47:32,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:47:32,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:47:32,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 259 [2022-03-20 12:47:32,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:47:32,815 INFO L134 CoverageAnalysis]: Checked inductivity of 4518 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 3222 trivial. 0 not checked. [2022-03-20 12:47:32,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:47:32,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68550041] [2022-03-20 12:47:32,815 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68550041] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:47:32,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371736357] [2022-03-20 12:47:32,815 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 12:47:32,815 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:47:32,815 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:47:32,816 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 12:47:32,817 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-03-20 12:47:33,106 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 12:47:33,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:47:33,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 1046 conjuncts, 38 conjunts are in the unsatisfiable core [2022-03-20 12:47:33,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:47:33,411 INFO L134 CoverageAnalysis]: Checked inductivity of 4518 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 3222 trivial. 0 not checked. [2022-03-20 12:47:33,412 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:47:34,556 INFO L134 CoverageAnalysis]: Checked inductivity of 4518 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 3222 trivial. 0 not checked. [2022-03-20 12:47:34,557 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1371736357] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:47:34,557 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:47:34,557 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 39, 39] total 79 [2022-03-20 12:47:34,557 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:47:34,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [218173224] [2022-03-20 12:47:34,557 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [218173224] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:47:34,557 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:47:34,557 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2022-03-20 12:47:34,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148972066] [2022-03-20 12:47:34,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:47:34,558 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-20 12:47:34,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:47:34,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-20 12:47:34,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2930, Invalid=3232, Unknown=0, NotChecked=0, Total=6162 [2022-03-20 12:47:34,560 INFO L87 Difference]: Start difference. First operand 854 states and 1215 transitions. Second operand has 41 states, 41 states have (on average 2.268292682926829) internal successors, (93), 39 states have internal predecessors, (93), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 12:47:36,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:47:36,860 INFO L93 Difference]: Finished difference Result 1684 states and 2468 transitions. [2022-03-20 12:47:36,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-03-20 12:47:36,860 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.268292682926829) internal successors, (93), 39 states have internal predecessors, (93), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 274 [2022-03-20 12:47:36,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:47:36,863 INFO L225 Difference]: With dead ends: 1684 [2022-03-20 12:47:36,863 INFO L226 Difference]: Without dead ends: 909 [2022-03-20 12:47:36,865 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 630 GetRequests, 514 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1028 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=5901, Invalid=7905, Unknown=0, NotChecked=0, Total=13806 [2022-03-20 12:47:36,865 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 2078 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 2160 mSolverCounterSat, 940 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2082 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 3100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 940 IncrementalHoareTripleChecker+Valid, 2160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-03-20 12:47:36,865 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2082 Valid, 53 Invalid, 3100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [940 Valid, 2160 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-03-20 12:47:36,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 909 states. [2022-03-20 12:47:37,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 909 to 877. [2022-03-20 12:47:37,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 877 states, 758 states have (on average 1.3482849604221636) internal successors, (1022), 758 states have internal predecessors, (1022), 114 states have call successors, (114), 6 states have call predecessors, (114), 4 states have return successors, (112), 112 states have call predecessors, (112), 112 states have call successors, (112) [2022-03-20 12:47:37,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 877 states to 877 states and 1248 transitions. [2022-03-20 12:47:37,095 INFO L78 Accepts]: Start accepts. Automaton has 877 states and 1248 transitions. Word has length 274 [2022-03-20 12:47:37,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:47:37,095 INFO L478 AbstractCegarLoop]: Abstraction has 877 states and 1248 transitions. [2022-03-20 12:47:37,095 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.268292682926829) internal successors, (93), 39 states have internal predecessors, (93), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 12:47:37,095 INFO L276 IsEmpty]: Start isEmpty. Operand 877 states and 1248 transitions. [2022-03-20 12:47:37,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 282 [2022-03-20 12:47:37,097 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:47:37,097 INFO L499 BasicCegarLoop]: trace histogram [37, 37, 37, 37, 37, 37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:47:37,120 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2022-03-20 12:47:37,312 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-03-20 12:47:37,313 INFO L403 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:47:37,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:47:37,313 INFO L85 PathProgramCache]: Analyzing trace with hash 31320897, now seen corresponding path program 71 times [2022-03-20 12:47:37,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:47:37,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1650359140] [2022-03-20 12:47:37,315 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:47:37,315 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:47:37,316 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:47:37,316 INFO L85 PathProgramCache]: Analyzing trace with hash 31320897, now seen corresponding path program 72 times [2022-03-20 12:47:37,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:47:37,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826723211] [2022-03-20 12:47:37,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:47:37,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:47:37,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:47:37,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:47:37,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:47:37,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 266 [2022-03-20 12:47:37,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:47:37,898 INFO L134 CoverageAnalysis]: Checked inductivity of 4773 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 3404 trivial. 0 not checked. [2022-03-20 12:47:37,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:47:37,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826723211] [2022-03-20 12:47:37,898 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826723211] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:47:37,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027317479] [2022-03-20 12:47:37,898 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 12:47:37,898 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:47:37,898 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:47:37,899 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 12:47:37,901 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-03-20 12:47:38,134 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 12:47:38,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:47:38,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 12:47:38,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:47:38,468 INFO L134 CoverageAnalysis]: Checked inductivity of 4773 backedges. 145 proven. 1 refuted. 0 times theorem prover too weak. 4627 trivial. 0 not checked. [2022-03-20 12:47:38,468 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:47:38,938 INFO L134 CoverageAnalysis]: Checked inductivity of 4773 backedges. 145 proven. 1 refuted. 0 times theorem prover too weak. 4627 trivial. 0 not checked. [2022-03-20 12:47:38,938 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2027317479] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:47:38,938 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:47:38,938 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 7, 7] total 50 [2022-03-20 12:47:38,939 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:47:38,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1650359140] [2022-03-20 12:47:38,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1650359140] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:47:38,939 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:47:38,939 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2022-03-20 12:47:38,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976844] [2022-03-20 12:47:38,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:47:38,939 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-03-20 12:47:38,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:47:38,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-03-20 12:47:38,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=809, Invalid=1641, Unknown=0, NotChecked=0, Total=2450 [2022-03-20 12:47:38,940 INFO L87 Difference]: Start difference. First operand 877 states and 1248 transitions. Second operand has 42 states, 42 states have (on average 2.261904761904762) internal successors, (95), 40 states have internal predecessors, (95), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 12:47:41,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:47:41,367 INFO L93 Difference]: Finished difference Result 1728 states and 2533 transitions. [2022-03-20 12:47:41,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-03-20 12:47:41,368 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.261904761904762) internal successors, (95), 40 states have internal predecessors, (95), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 281 [2022-03-20 12:47:41,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:47:41,370 INFO L225 Difference]: With dead ends: 1728 [2022-03-20 12:47:41,371 INFO L226 Difference]: Without dead ends: 932 [2022-03-20 12:47:41,372 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 646 GetRequests, 557 SyntacticMatches, 1 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1233 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2452, Invalid=5558, Unknown=0, NotChecked=0, Total=8010 [2022-03-20 12:47:41,372 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 2011 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 2409 mSolverCounterSat, 841 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2015 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 3250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 841 IncrementalHoareTripleChecker+Valid, 2409 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-20 12:47:41,372 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2015 Valid, 57 Invalid, 3250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [841 Valid, 2409 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-03-20 12:47:41,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 932 states. [2022-03-20 12:47:41,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 932 to 900. [2022-03-20 12:47:41,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 900 states, 778 states have (on average 1.3483290488431876) internal successors, (1049), 778 states have internal predecessors, (1049), 117 states have call successors, (117), 6 states have call predecessors, (117), 4 states have return successors, (115), 115 states have call predecessors, (115), 115 states have call successors, (115) [2022-03-20 12:47:41,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 900 states to 900 states and 1281 transitions. [2022-03-20 12:47:41,626 INFO L78 Accepts]: Start accepts. Automaton has 900 states and 1281 transitions. Word has length 281 [2022-03-20 12:47:41,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:47:41,626 INFO L478 AbstractCegarLoop]: Abstraction has 900 states and 1281 transitions. [2022-03-20 12:47:41,626 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.261904761904762) internal successors, (95), 40 states have internal predecessors, (95), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 12:47:41,626 INFO L276 IsEmpty]: Start isEmpty. Operand 900 states and 1281 transitions. [2022-03-20 12:47:41,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 289 [2022-03-20 12:47:41,628 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:47:41,628 INFO L499 BasicCegarLoop]: trace histogram [38, 38, 38, 38, 38, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:47:41,665 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-03-20 12:47:41,845 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-03-20 12:47:41,845 INFO L403 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:47:41,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:47:41,846 INFO L85 PathProgramCache]: Analyzing trace with hash 252910063, now seen corresponding path program 73 times [2022-03-20 12:47:41,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:47:41,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1301589931] [2022-03-20 12:47:41,848 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:47:41,848 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:47:41,848 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:47:41,848 INFO L85 PathProgramCache]: Analyzing trace with hash 252910063, now seen corresponding path program 74 times [2022-03-20 12:47:41,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:47:41,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929909054] [2022-03-20 12:47:41,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:47:41,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:47:41,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:47:42,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:47:42,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:47:42,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 273 [2022-03-20 12:47:42,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:47:42,304 INFO L134 CoverageAnalysis]: Checked inductivity of 5035 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 3591 trivial. 0 not checked. [2022-03-20 12:47:42,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:47:42,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929909054] [2022-03-20 12:47:42,304 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929909054] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:47:42,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2124273401] [2022-03-20 12:47:42,305 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 12:47:42,305 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:47:42,305 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:47:42,306 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 12:47:42,307 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-03-20 12:47:42,621 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 12:47:42,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:47:42,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 1098 conjuncts, 40 conjunts are in the unsatisfiable core [2022-03-20 12:47:42,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:47:42,851 INFO L134 CoverageAnalysis]: Checked inductivity of 5035 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 3591 trivial. 0 not checked. [2022-03-20 12:47:42,851 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:47:44,040 INFO L134 CoverageAnalysis]: Checked inductivity of 5035 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 3591 trivial. 0 not checked. [2022-03-20 12:47:44,041 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2124273401] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:47:44,041 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:47:44,041 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 41, 41] total 83 [2022-03-20 12:47:44,041 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:47:44,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1301589931] [2022-03-20 12:47:44,041 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1301589931] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:47:44,041 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:47:44,041 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2022-03-20 12:47:44,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421065260] [2022-03-20 12:47:44,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:47:44,042 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-03-20 12:47:44,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:47:44,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-03-20 12:47:44,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3244, Invalid=3562, Unknown=0, NotChecked=0, Total=6806 [2022-03-20 12:47:44,042 INFO L87 Difference]: Start difference. First operand 900 states and 1281 transitions. Second operand has 43 states, 43 states have (on average 2.255813953488372) internal successors, (97), 41 states have internal predecessors, (97), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 12:47:46,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:47:46,172 INFO L93 Difference]: Finished difference Result 1772 states and 2598 transitions. [2022-03-20 12:47:46,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-03-20 12:47:46,172 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.255813953488372) internal successors, (97), 41 states have internal predecessors, (97), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 288 [2022-03-20 12:47:46,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:47:46,175 INFO L225 Difference]: With dead ends: 1772 [2022-03-20 12:47:46,175 INFO L226 Difference]: Without dead ends: 955 [2022-03-20 12:47:46,177 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 662 GetRequests, 540 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1123 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=6531, Invalid=8721, Unknown=0, NotChecked=0, Total=15252 [2022-03-20 12:47:46,178 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 2135 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2246 mSolverCounterSat, 875 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2139 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 3121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 875 IncrementalHoareTripleChecker+Valid, 2246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-20 12:47:46,178 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2139 Valid, 51 Invalid, 3121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [875 Valid, 2246 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-20 12:47:46,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 955 states. [2022-03-20 12:47:46,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 955 to 923. [2022-03-20 12:47:46,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 923 states, 798 states have (on average 1.3483709273182958) internal successors, (1076), 798 states have internal predecessors, (1076), 120 states have call successors, (120), 6 states have call predecessors, (120), 4 states have return successors, (118), 118 states have call predecessors, (118), 118 states have call successors, (118) [2022-03-20 12:47:46,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 923 states to 923 states and 1314 transitions. [2022-03-20 12:47:46,448 INFO L78 Accepts]: Start accepts. Automaton has 923 states and 1314 transitions. Word has length 288 [2022-03-20 12:47:46,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:47:46,449 INFO L478 AbstractCegarLoop]: Abstraction has 923 states and 1314 transitions. [2022-03-20 12:47:46,449 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.255813953488372) internal successors, (97), 41 states have internal predecessors, (97), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 12:47:46,449 INFO L276 IsEmpty]: Start isEmpty. Operand 923 states and 1314 transitions. [2022-03-20 12:47:46,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 296 [2022-03-20 12:47:46,451 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:47:46,451 INFO L499 BasicCegarLoop]: trace histogram [39, 39, 39, 39, 39, 39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:47:46,487 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-03-20 12:47:46,664 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2022-03-20 12:47:46,664 INFO L403 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:47:46,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:47:46,664 INFO L85 PathProgramCache]: Analyzing trace with hash -1967344003, now seen corresponding path program 75 times [2022-03-20 12:47:46,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:47:46,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [403414928] [2022-03-20 12:47:46,666 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:47:46,666 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:47:46,666 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:47:46,666 INFO L85 PathProgramCache]: Analyzing trace with hash -1967344003, now seen corresponding path program 76 times [2022-03-20 12:47:46,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:47:46,666 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307162024] [2022-03-20 12:47:46,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:47:46,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:47:46,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:47:47,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:47:47,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:47:47,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 280 [2022-03-20 12:47:47,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:47:47,182 INFO L134 CoverageAnalysis]: Checked inductivity of 5304 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 3783 trivial. 0 not checked. [2022-03-20 12:47:47,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:47:47,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307162024] [2022-03-20 12:47:47,182 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307162024] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:47:47,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723281056] [2022-03-20 12:47:47,183 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 12:47:47,183 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:47:47,183 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:47:47,184 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 12:47:47,186 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-03-20 12:47:47,519 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 12:47:47,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:47:47,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 1124 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-20 12:47:47,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:47:47,714 INFO L134 CoverageAnalysis]: Checked inductivity of 5304 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 3783 trivial. 0 not checked. [2022-03-20 12:47:47,715 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:47:48,819 INFO L134 CoverageAnalysis]: Checked inductivity of 5304 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 3783 trivial. 0 not checked. [2022-03-20 12:47:48,820 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [723281056] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:47:48,820 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:47:48,820 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 42, 42] total 85 [2022-03-20 12:47:48,820 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:47:48,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [403414928] [2022-03-20 12:47:48,820 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [403414928] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:47:48,820 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:47:48,820 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2022-03-20 12:47:48,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643260398] [2022-03-20 12:47:48,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:47:48,820 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-03-20 12:47:48,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:47:48,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-03-20 12:47:48,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3407, Invalid=3733, Unknown=0, NotChecked=0, Total=7140 [2022-03-20 12:47:48,822 INFO L87 Difference]: Start difference. First operand 923 states and 1314 transitions. Second operand has 44 states, 44 states have (on average 2.25) internal successors, (99), 42 states have internal predecessors, (99), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 12:47:50,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:47:50,914 INFO L93 Difference]: Finished difference Result 1816 states and 2663 transitions. [2022-03-20 12:47:50,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-03-20 12:47:50,915 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.25) internal successors, (99), 42 states have internal predecessors, (99), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 295 [2022-03-20 12:47:50,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:47:50,918 INFO L225 Difference]: With dead ends: 1816 [2022-03-20 12:47:50,918 INFO L226 Difference]: Without dead ends: 978 [2022-03-20 12:47:50,920 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 678 GetRequests, 553 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1172 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=6858, Invalid=9144, Unknown=0, NotChecked=0, Total=16002 [2022-03-20 12:47:50,921 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 2337 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 2337 mSolverCounterSat, 1083 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2341 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 3420 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1083 IncrementalHoareTripleChecker+Valid, 2337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-20 12:47:50,921 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2341 Valid, 49 Invalid, 3420 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1083 Valid, 2337 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-20 12:47:50,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 978 states. [2022-03-20 12:47:51,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 978 to 946. [2022-03-20 12:47:51,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 946 states, 818 states have (on average 1.3484107579462103) internal successors, (1103), 818 states have internal predecessors, (1103), 123 states have call successors, (123), 6 states have call predecessors, (123), 4 states have return successors, (121), 121 states have call predecessors, (121), 121 states have call successors, (121) [2022-03-20 12:47:51,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 946 states to 946 states and 1347 transitions. [2022-03-20 12:47:51,191 INFO L78 Accepts]: Start accepts. Automaton has 946 states and 1347 transitions. Word has length 295 [2022-03-20 12:47:51,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:47:51,191 INFO L478 AbstractCegarLoop]: Abstraction has 946 states and 1347 transitions. [2022-03-20 12:47:51,192 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.25) internal successors, (99), 42 states have internal predecessors, (99), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 12:47:51,192 INFO L276 IsEmpty]: Start isEmpty. Operand 946 states and 1347 transitions. [2022-03-20 12:47:51,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 303 [2022-03-20 12:47:51,194 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:47:51,194 INFO L499 BasicCegarLoop]: trace histogram [40, 40, 40, 40, 40, 40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:47:51,212 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-03-20 12:47:51,412 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2022-03-20 12:47:51,413 INFO L403 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:47:51,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:47:51,413 INFO L85 PathProgramCache]: Analyzing trace with hash 596373683, now seen corresponding path program 77 times [2022-03-20 12:47:51,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:47:51,413 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [346989359] [2022-03-20 12:47:51,415 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:47:51,415 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:47:51,415 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:47:51,415 INFO L85 PathProgramCache]: Analyzing trace with hash 596373683, now seen corresponding path program 78 times [2022-03-20 12:47:51,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:47:51,415 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234184105] [2022-03-20 12:47:51,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:47:51,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:47:51,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:47:51,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:47:51,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:47:51,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 287 [2022-03-20 12:47:51,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:47:51,860 INFO L134 CoverageAnalysis]: Checked inductivity of 5580 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 3980 trivial. 0 not checked. [2022-03-20 12:47:51,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:47:51,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234184105] [2022-03-20 12:47:51,860 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234184105] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:47:51,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787649063] [2022-03-20 12:47:51,860 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 12:47:51,860 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:47:51,860 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:47:51,876 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 12:47:51,901 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-03-20 12:47:52,145 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 12:47:52,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:47:52,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 12:47:52,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:47:52,598 INFO L134 CoverageAnalysis]: Checked inductivity of 5580 backedges. 157 proven. 1 refuted. 0 times theorem prover too weak. 5422 trivial. 0 not checked. [2022-03-20 12:47:52,598 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:47:52,817 INFO L134 CoverageAnalysis]: Checked inductivity of 5580 backedges. 157 proven. 1 refuted. 0 times theorem prover too weak. 5422 trivial. 0 not checked. [2022-03-20 12:47:52,818 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1787649063] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:47:52,818 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:47:52,818 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 7, 7] total 53 [2022-03-20 12:47:52,818 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:47:52,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [346989359] [2022-03-20 12:47:52,818 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [346989359] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:47:52,818 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:47:52,818 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2022-03-20 12:47:52,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322583536] [2022-03-20 12:47:52,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:47:52,824 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-03-20 12:47:52,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:47:52,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-03-20 12:47:52,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=932, Invalid=1824, Unknown=0, NotChecked=0, Total=2756 [2022-03-20 12:47:52,826 INFO L87 Difference]: Start difference. First operand 946 states and 1347 transitions. Second operand has 45 states, 45 states have (on average 2.2444444444444445) internal successors, (101), 43 states have internal predecessors, (101), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 12:47:55,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:47:55,327 INFO L93 Difference]: Finished difference Result 1860 states and 2728 transitions. [2022-03-20 12:47:55,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-03-20 12:47:55,328 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.2444444444444445) internal successors, (101), 43 states have internal predecessors, (101), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 302 [2022-03-20 12:47:55,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:47:55,330 INFO L225 Difference]: With dead ends: 1860 [2022-03-20 12:47:55,330 INFO L226 Difference]: Without dead ends: 1001 [2022-03-20 12:47:55,332 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 694 GetRequests, 599 SyntacticMatches, 1 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1392 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2827, Invalid=6293, Unknown=0, NotChecked=0, Total=9120 [2022-03-20 12:47:55,332 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 2437 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 2472 mSolverCounterSat, 1098 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2441 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 3570 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1098 IncrementalHoareTripleChecker+Valid, 2472 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-03-20 12:47:55,333 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2441 Valid, 55 Invalid, 3570 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1098 Valid, 2472 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-03-20 12:47:55,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1001 states. [2022-03-20 12:47:55,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1001 to 969. [2022-03-20 12:47:55,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 969 states, 838 states have (on average 1.3484486873508352) internal successors, (1130), 838 states have internal predecessors, (1130), 126 states have call successors, (126), 6 states have call predecessors, (126), 4 states have return successors, (124), 124 states have call predecessors, (124), 124 states have call successors, (124) [2022-03-20 12:47:55,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 969 states to 969 states and 1380 transitions. [2022-03-20 12:47:55,611 INFO L78 Accepts]: Start accepts. Automaton has 969 states and 1380 transitions. Word has length 302 [2022-03-20 12:47:55,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:47:55,611 INFO L478 AbstractCegarLoop]: Abstraction has 969 states and 1380 transitions. [2022-03-20 12:47:55,611 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.2444444444444445) internal successors, (101), 43 states have internal predecessors, (101), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 12:47:55,611 INFO L276 IsEmpty]: Start isEmpty. Operand 969 states and 1380 transitions. [2022-03-20 12:47:55,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 310 [2022-03-20 12:47:55,614 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:47:55,614 INFO L499 BasicCegarLoop]: trace histogram [41, 41, 41, 41, 41, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:47:55,631 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2022-03-20 12:47:55,827 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2022-03-20 12:47:55,827 INFO L403 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:47:55,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:47:55,828 INFO L85 PathProgramCache]: Analyzing trace with hash 1015311801, now seen corresponding path program 79 times [2022-03-20 12:47:55,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:47:55,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [16734534] [2022-03-20 12:47:55,829 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:47:55,829 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:47:55,829 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:47:55,830 INFO L85 PathProgramCache]: Analyzing trace with hash 1015311801, now seen corresponding path program 80 times [2022-03-20 12:47:55,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:47:55,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658130883] [2022-03-20 12:47:55,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:47:55,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:47:55,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:47:56,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:47:56,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:47:56,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 294 [2022-03-20 12:47:56,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:47:56,523 INFO L134 CoverageAnalysis]: Checked inductivity of 5863 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 4182 trivial. 0 not checked. [2022-03-20 12:47:56,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:47:56,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658130883] [2022-03-20 12:47:56,523 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658130883] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:47:56,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2092736105] [2022-03-20 12:47:56,524 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 12:47:56,524 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:47:56,524 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:47:56,525 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 12:47:56,526 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-03-20 12:47:56,859 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 12:47:56,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:47:56,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 1176 conjuncts, 43 conjunts are in the unsatisfiable core [2022-03-20 12:47:56,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:47:57,167 INFO L134 CoverageAnalysis]: Checked inductivity of 5863 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 4182 trivial. 0 not checked. [2022-03-20 12:47:57,167 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:47:59,058 INFO L134 CoverageAnalysis]: Checked inductivity of 5863 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 4182 trivial. 0 not checked. [2022-03-20 12:47:59,059 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2092736105] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:47:59,059 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:47:59,059 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 44, 44] total 89 [2022-03-20 12:47:59,059 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:47:59,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [16734534] [2022-03-20 12:47:59,059 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [16734534] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:47:59,059 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:47:59,059 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2022-03-20 12:47:59,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101560541] [2022-03-20 12:47:59,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:47:59,059 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-03-20 12:47:59,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:47:59,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-03-20 12:47:59,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3745, Invalid=4087, Unknown=0, NotChecked=0, Total=7832 [2022-03-20 12:47:59,061 INFO L87 Difference]: Start difference. First operand 969 states and 1380 transitions. Second operand has 46 states, 46 states have (on average 2.239130434782609) internal successors, (103), 44 states have internal predecessors, (103), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 12:48:01,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:48:01,931 INFO L93 Difference]: Finished difference Result 1904 states and 2793 transitions. [2022-03-20 12:48:01,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-03-20 12:48:01,932 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.239130434782609) internal successors, (103), 44 states have internal predecessors, (103), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 309 [2022-03-20 12:48:01,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:48:01,935 INFO L225 Difference]: With dead ends: 1904 [2022-03-20 12:48:01,935 INFO L226 Difference]: Without dead ends: 1024 [2022-03-20 12:48:01,936 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 710 GetRequests, 579 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1273 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=7536, Invalid=10020, Unknown=0, NotChecked=0, Total=17556 [2022-03-20 12:48:01,937 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 2442 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 2578 mSolverCounterSat, 1181 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2446 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 3759 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1181 IncrementalHoareTripleChecker+Valid, 2578 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-03-20 12:48:01,937 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2446 Valid, 49 Invalid, 3759 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1181 Valid, 2578 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-03-20 12:48:01,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1024 states. [2022-03-20 12:48:02,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1024 to 992. [2022-03-20 12:48:02,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 992 states, 858 states have (on average 1.3484848484848484) internal successors, (1157), 858 states have internal predecessors, (1157), 129 states have call successors, (129), 6 states have call predecessors, (129), 4 states have return successors, (127), 127 states have call predecessors, (127), 127 states have call successors, (127) [2022-03-20 12:48:02,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 992 states to 992 states and 1413 transitions. [2022-03-20 12:48:02,224 INFO L78 Accepts]: Start accepts. Automaton has 992 states and 1413 transitions. Word has length 309 [2022-03-20 12:48:02,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:48:02,225 INFO L478 AbstractCegarLoop]: Abstraction has 992 states and 1413 transitions. [2022-03-20 12:48:02,225 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.239130434782609) internal successors, (103), 44 states have internal predecessors, (103), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 12:48:02,225 INFO L276 IsEmpty]: Start isEmpty. Operand 992 states and 1413 transitions. [2022-03-20 12:48:02,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 317 [2022-03-20 12:48:02,227 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:48:02,227 INFO L499 BasicCegarLoop]: trace histogram [42, 42, 42, 42, 42, 42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:48:02,261 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-03-20 12:48:02,445 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:48:02,445 INFO L403 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:48:02,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:48:02,446 INFO L85 PathProgramCache]: Analyzing trace with hash 1062959991, now seen corresponding path program 81 times [2022-03-20 12:48:02,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:48:02,446 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [374929409] [2022-03-20 12:48:02,448 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:48:02,448 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:48:02,449 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:48:02,449 INFO L85 PathProgramCache]: Analyzing trace with hash 1062959991, now seen corresponding path program 82 times [2022-03-20 12:48:02,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:48:02,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074151049] [2022-03-20 12:48:02,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:48:02,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:48:02,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:48:03,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:48:03,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:48:03,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 301 [2022-03-20 12:48:03,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:48:03,153 INFO L134 CoverageAnalysis]: Checked inductivity of 6153 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 4389 trivial. 0 not checked. [2022-03-20 12:48:03,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:48:03,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074151049] [2022-03-20 12:48:03,153 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074151049] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:48:03,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1816913568] [2022-03-20 12:48:03,153 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 12:48:03,153 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:48:03,153 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:48:03,154 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 12:48:03,155 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-03-20 12:48:03,508 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 12:48:03,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:48:03,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 1202 conjuncts, 44 conjunts are in the unsatisfiable core [2022-03-20 12:48:03,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:48:03,954 INFO L134 CoverageAnalysis]: Checked inductivity of 6153 backedges. 0 proven. 4388 refuted. 0 times theorem prover too weak. 1765 trivial. 0 not checked. [2022-03-20 12:48:03,954 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:48:05,550 INFO L134 CoverageAnalysis]: Checked inductivity of 6153 backedges. 0 proven. 4388 refuted. 0 times theorem prover too weak. 1765 trivial. 0 not checked. [2022-03-20 12:48:05,551 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1816913568] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:48:05,551 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:48:05,551 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 45, 45] total 91 [2022-03-20 12:48:05,551 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:48:05,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [374929409] [2022-03-20 12:48:05,551 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [374929409] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:48:05,551 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:48:05,551 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2022-03-20 12:48:05,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420315840] [2022-03-20 12:48:05,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:48:05,552 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-03-20 12:48:05,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:48:05,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-03-20 12:48:05,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3920, Invalid=4270, Unknown=0, NotChecked=0, Total=8190 [2022-03-20 12:48:05,553 INFO L87 Difference]: Start difference. First operand 992 states and 1413 transitions. Second operand has 47 states, 47 states have (on average 2.234042553191489) internal successors, (105), 45 states have internal predecessors, (105), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 12:48:08,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:48:08,222 INFO L93 Difference]: Finished difference Result 1948 states and 2858 transitions. [2022-03-20 12:48:08,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-03-20 12:48:08,222 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.234042553191489) internal successors, (105), 45 states have internal predecessors, (105), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 316 [2022-03-20 12:48:08,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:48:08,226 INFO L225 Difference]: With dead ends: 1948 [2022-03-20 12:48:08,226 INFO L226 Difference]: Without dead ends: 1047 [2022-03-20 12:48:08,227 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 726 GetRequests, 592 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1325 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=7887, Invalid=10473, Unknown=0, NotChecked=0, Total=18360 [2022-03-20 12:48:08,228 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 2358 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 2462 mSolverCounterSat, 1045 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2362 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 3507 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1045 IncrementalHoareTripleChecker+Valid, 2462 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-20 12:48:08,228 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2362 Valid, 55 Invalid, 3507 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1045 Valid, 2462 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-03-20 12:48:08,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1047 states. [2022-03-20 12:48:08,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1047 to 1015. [2022-03-20 12:48:08,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1015 states, 878 states have (on average 1.3485193621867881) internal successors, (1184), 878 states have internal predecessors, (1184), 132 states have call successors, (132), 6 states have call predecessors, (132), 4 states have return successors, (130), 130 states have call predecessors, (130), 130 states have call successors, (130) [2022-03-20 12:48:08,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1015 states to 1015 states and 1446 transitions. [2022-03-20 12:48:08,530 INFO L78 Accepts]: Start accepts. Automaton has 1015 states and 1446 transitions. Word has length 316 [2022-03-20 12:48:08,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:48:08,530 INFO L478 AbstractCegarLoop]: Abstraction has 1015 states and 1446 transitions. [2022-03-20 12:48:08,530 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.234042553191489) internal successors, (105), 45 states have internal predecessors, (105), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 12:48:08,530 INFO L276 IsEmpty]: Start isEmpty. Operand 1015 states and 1446 transitions. [2022-03-20 12:48:08,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 324 [2022-03-20 12:48:08,532 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:48:08,532 INFO L499 BasicCegarLoop]: trace histogram [43, 43, 43, 43, 43, 43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:48:08,553 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-03-20 12:48:08,751 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:48:08,751 INFO L403 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:48:08,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:48:08,751 INFO L85 PathProgramCache]: Analyzing trace with hash -577384203, now seen corresponding path program 83 times [2022-03-20 12:48:08,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:48:08,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2100270604] [2022-03-20 12:48:08,753 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:48:08,753 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:48:08,753 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:48:08,753 INFO L85 PathProgramCache]: Analyzing trace with hash -577384203, now seen corresponding path program 84 times [2022-03-20 12:48:08,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:48:08,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413876593] [2022-03-20 12:48:08,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:48:08,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:48:08,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:48:09,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:48:09,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:48:09,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 308 [2022-03-20 12:48:09,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:48:09,421 INFO L134 CoverageAnalysis]: Checked inductivity of 6450 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 4601 trivial. 0 not checked. [2022-03-20 12:48:09,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:48:09,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413876593] [2022-03-20 12:48:09,421 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413876593] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:48:09,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66113031] [2022-03-20 12:48:09,421 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 12:48:09,421 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:48:09,421 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:48:09,422 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 12:48:09,423 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-03-20 12:48:09,704 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 12:48:09,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:48:09,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 12:48:09,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:48:10,111 INFO L134 CoverageAnalysis]: Checked inductivity of 6450 backedges. 169 proven. 1 refuted. 0 times theorem prover too weak. 6280 trivial. 0 not checked. [2022-03-20 12:48:10,112 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:48:10,464 INFO L134 CoverageAnalysis]: Checked inductivity of 6450 backedges. 169 proven. 1 refuted. 0 times theorem prover too weak. 6280 trivial. 0 not checked. [2022-03-20 12:48:10,464 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [66113031] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:48:10,464 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:48:10,464 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 7, 7] total 56 [2022-03-20 12:48:10,464 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:48:10,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2100270604] [2022-03-20 12:48:10,464 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2100270604] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:48:10,464 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:48:10,465 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [] total 48 [2022-03-20 12:48:10,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141438469] [2022-03-20 12:48:10,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:48:10,465 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-03-20 12:48:10,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:48:10,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-03-20 12:48:10,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1064, Invalid=2016, Unknown=0, NotChecked=0, Total=3080 [2022-03-20 12:48:10,466 INFO L87 Difference]: Start difference. First operand 1015 states and 1446 transitions. Second operand has 48 states, 48 states have (on average 2.2291666666666665) internal successors, (107), 46 states have internal predecessors, (107), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 12:48:13,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:48:13,183 INFO L93 Difference]: Finished difference Result 1992 states and 2923 transitions. [2022-03-20 12:48:13,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-03-20 12:48:13,183 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.2291666666666665) internal successors, (107), 46 states have internal predecessors, (107), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 323 [2022-03-20 12:48:13,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:48:13,195 INFO L225 Difference]: With dead ends: 1992 [2022-03-20 12:48:13,195 INFO L226 Difference]: Without dead ends: 1070 [2022-03-20 12:48:13,197 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 742 GetRequests, 641 SyntacticMatches, 1 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1560 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=3229, Invalid=7073, Unknown=0, NotChecked=0, Total=10302 [2022-03-20 12:48:13,197 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 2793 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2501 mSolverCounterSat, 1274 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2797 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 3775 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1274 IncrementalHoareTripleChecker+Valid, 2501 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-03-20 12:48:13,197 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2797 Valid, 51 Invalid, 3775 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1274 Valid, 2501 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-03-20 12:48:13,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1070 states. [2022-03-20 12:48:13,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1070 to 1038. [2022-03-20 12:48:13,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1038 states, 898 states have (on average 1.3485523385300668) internal successors, (1211), 898 states have internal predecessors, (1211), 135 states have call successors, (135), 6 states have call predecessors, (135), 4 states have return successors, (133), 133 states have call predecessors, (133), 133 states have call successors, (133) [2022-03-20 12:48:13,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1038 states to 1038 states and 1479 transitions. [2022-03-20 12:48:13,547 INFO L78 Accepts]: Start accepts. Automaton has 1038 states and 1479 transitions. Word has length 323 [2022-03-20 12:48:13,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:48:13,547 INFO L478 AbstractCegarLoop]: Abstraction has 1038 states and 1479 transitions. [2022-03-20 12:48:13,547 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.2291666666666665) internal successors, (107), 46 states have internal predecessors, (107), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 12:48:13,548 INFO L276 IsEmpty]: Start isEmpty. Operand 1038 states and 1479 transitions. [2022-03-20 12:48:13,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2022-03-20 12:48:13,550 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:48:13,551 INFO L499 BasicCegarLoop]: trace histogram [44, 44, 44, 44, 44, 44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:48:13,585 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-03-20 12:48:13,767 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-03-20 12:48:13,767 INFO L403 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:48:13,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:48:13,768 INFO L85 PathProgramCache]: Analyzing trace with hash -2099185093, now seen corresponding path program 85 times [2022-03-20 12:48:13,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:48:13,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1331416684] [2022-03-20 12:48:13,769 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:48:13,769 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:48:13,770 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:48:13,770 INFO L85 PathProgramCache]: Analyzing trace with hash -2099185093, now seen corresponding path program 86 times [2022-03-20 12:48:13,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:48:13,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262383237] [2022-03-20 12:48:13,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:48:13,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:48:13,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:48:14,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:48:14,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:48:14,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 315 [2022-03-20 12:48:14,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:48:14,538 INFO L134 CoverageAnalysis]: Checked inductivity of 6754 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 4818 trivial. 0 not checked. [2022-03-20 12:48:14,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:48:14,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262383237] [2022-03-20 12:48:14,538 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262383237] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:48:14,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [50909466] [2022-03-20 12:48:14,538 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 12:48:14,538 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:48:14,538 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:48:14,539 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 12:48:14,541 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-03-20 12:48:14,911 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 12:48:14,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:48:14,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 1254 conjuncts, 46 conjunts are in the unsatisfiable core [2022-03-20 12:48:14,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:48:15,249 INFO L134 CoverageAnalysis]: Checked inductivity of 6754 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 4818 trivial. 0 not checked. [2022-03-20 12:48:15,249 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:48:16,842 INFO L134 CoverageAnalysis]: Checked inductivity of 6754 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 4818 trivial. 0 not checked. [2022-03-20 12:48:16,843 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [50909466] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:48:16,843 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:48:16,843 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 47, 47] total 95 [2022-03-20 12:48:16,843 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:48:16,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1331416684] [2022-03-20 12:48:16,843 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1331416684] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:48:16,843 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:48:16,843 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [49] imperfect sequences [] total 49 [2022-03-20 12:48:16,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673973553] [2022-03-20 12:48:16,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:48:16,844 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-03-20 12:48:16,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:48:16,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-03-20 12:48:16,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4282, Invalid=4648, Unknown=0, NotChecked=0, Total=8930 [2022-03-20 12:48:16,846 INFO L87 Difference]: Start difference. First operand 1038 states and 1479 transitions. Second operand has 49 states, 49 states have (on average 2.2244897959183674) internal successors, (109), 47 states have internal predecessors, (109), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 12:48:19,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:48:19,672 INFO L93 Difference]: Finished difference Result 2036 states and 2988 transitions. [2022-03-20 12:48:19,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-03-20 12:48:19,672 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.2244897959183674) internal successors, (109), 47 states have internal predecessors, (109), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 330 [2022-03-20 12:48:19,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:48:19,675 INFO L225 Difference]: With dead ends: 2036 [2022-03-20 12:48:19,675 INFO L226 Difference]: Without dead ends: 1093 [2022-03-20 12:48:19,677 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 758 GetRequests, 618 SyntacticMatches, 0 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1432 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=8613, Invalid=11409, Unknown=0, NotChecked=0, Total=20022 [2022-03-20 12:48:19,677 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 2436 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 2791 mSolverCounterSat, 1053 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2440 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 3844 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1053 IncrementalHoareTripleChecker+Valid, 2791 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-03-20 12:48:19,677 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2440 Valid, 59 Invalid, 3844 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1053 Valid, 2791 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-03-20 12:48:19,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1093 states. [2022-03-20 12:48:20,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1093 to 1061. [2022-03-20 12:48:20,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1061 states, 918 states have (on average 1.3485838779956427) internal successors, (1238), 918 states have internal predecessors, (1238), 138 states have call successors, (138), 6 states have call predecessors, (138), 4 states have return successors, (136), 136 states have call predecessors, (136), 136 states have call successors, (136) [2022-03-20 12:48:20,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1061 states to 1061 states and 1512 transitions. [2022-03-20 12:48:20,016 INFO L78 Accepts]: Start accepts. Automaton has 1061 states and 1512 transitions. Word has length 330 [2022-03-20 12:48:20,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:48:20,016 INFO L478 AbstractCegarLoop]: Abstraction has 1061 states and 1512 transitions. [2022-03-20 12:48:20,016 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.2244897959183674) internal successors, (109), 47 states have internal predecessors, (109), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 12:48:20,016 INFO L276 IsEmpty]: Start isEmpty. Operand 1061 states and 1512 transitions. [2022-03-20 12:48:20,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 338 [2022-03-20 12:48:20,019 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:48:20,019 INFO L499 BasicCegarLoop]: trace histogram [45, 45, 45, 45, 45, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:48:20,041 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-03-20 12:48:20,234 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-03-20 12:48:20,234 INFO L403 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:48:20,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:48:20,235 INFO L85 PathProgramCache]: Analyzing trace with hash 1037148209, now seen corresponding path program 87 times [2022-03-20 12:48:20,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:48:20,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1335678816] [2022-03-20 12:48:20,236 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:48:20,236 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:48:20,236 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:48:20,237 INFO L85 PathProgramCache]: Analyzing trace with hash 1037148209, now seen corresponding path program 88 times [2022-03-20 12:48:20,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:48:20,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531013498] [2022-03-20 12:48:20,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:48:20,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:48:20,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:48:20,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:48:20,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:48:20,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 322 [2022-03-20 12:48:20,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:48:20,981 INFO L134 CoverageAnalysis]: Checked inductivity of 7065 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 5040 trivial. 0 not checked. [2022-03-20 12:48:20,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:48:20,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531013498] [2022-03-20 12:48:20,982 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531013498] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:48:20,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998763316] [2022-03-20 12:48:20,982 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 12:48:20,982 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:48:20,982 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:48:20,983 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 12:48:20,984 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-03-20 12:48:21,355 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 12:48:21,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:48:21,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 1280 conjuncts, 47 conjunts are in the unsatisfiable core [2022-03-20 12:48:21,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:48:21,770 INFO L134 CoverageAnalysis]: Checked inductivity of 7065 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 5040 trivial. 0 not checked. [2022-03-20 12:48:21,770 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:48:23,450 INFO L134 CoverageAnalysis]: Checked inductivity of 7065 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 5040 trivial. 0 not checked. [2022-03-20 12:48:23,451 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [998763316] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:48:23,451 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:48:23,451 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 48, 48] total 97 [2022-03-20 12:48:23,451 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:48:23,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1335678816] [2022-03-20 12:48:23,451 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1335678816] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:48:23,451 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:48:23,451 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2022-03-20 12:48:23,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343610536] [2022-03-20 12:48:23,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:48:23,452 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-03-20 12:48:23,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:48:23,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-03-20 12:48:23,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4469, Invalid=4843, Unknown=0, NotChecked=0, Total=9312 [2022-03-20 12:48:23,453 INFO L87 Difference]: Start difference. First operand 1061 states and 1512 transitions. Second operand has 50 states, 50 states have (on average 2.22) internal successors, (111), 48 states have internal predecessors, (111), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 12:48:26,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:48:26,994 INFO L93 Difference]: Finished difference Result 2080 states and 3053 transitions. [2022-03-20 12:48:26,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-03-20 12:48:26,995 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.22) internal successors, (111), 48 states have internal predecessors, (111), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 337 [2022-03-20 12:48:26,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:48:26,997 INFO L225 Difference]: With dead ends: 2080 [2022-03-20 12:48:26,997 INFO L226 Difference]: Without dead ends: 1116 [2022-03-20 12:48:26,999 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 774 GetRequests, 631 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1487 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=8988, Invalid=11892, Unknown=0, NotChecked=0, Total=20880 [2022-03-20 12:48:27,000 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 2617 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 2754 mSolverCounterSat, 1170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2621 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 3924 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1170 IncrementalHoareTripleChecker+Valid, 2754 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-03-20 12:48:27,000 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2621 Valid, 55 Invalid, 3924 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1170 Valid, 2754 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-03-20 12:48:27,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1116 states. [2022-03-20 12:48:27,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1116 to 1084. [2022-03-20 12:48:27,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1084 states, 938 states have (on average 1.3486140724946696) internal successors, (1265), 938 states have internal predecessors, (1265), 141 states have call successors, (141), 6 states have call predecessors, (141), 4 states have return successors, (139), 139 states have call predecessors, (139), 139 states have call successors, (139) [2022-03-20 12:48:27,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1084 states to 1084 states and 1545 transitions. [2022-03-20 12:48:27,401 INFO L78 Accepts]: Start accepts. Automaton has 1084 states and 1545 transitions. Word has length 337 [2022-03-20 12:48:27,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:48:27,401 INFO L478 AbstractCegarLoop]: Abstraction has 1084 states and 1545 transitions. [2022-03-20 12:48:27,401 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.22) internal successors, (111), 48 states have internal predecessors, (111), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 12:48:27,401 INFO L276 IsEmpty]: Start isEmpty. Operand 1084 states and 1545 transitions. [2022-03-20 12:48:27,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 345 [2022-03-20 12:48:27,404 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:48:27,404 INFO L499 BasicCegarLoop]: trace histogram [46, 46, 46, 46, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:48:27,423 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-03-20 12:48:27,619 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2022-03-20 12:48:27,620 INFO L403 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:48:27,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:48:27,620 INFO L85 PathProgramCache]: Analyzing trace with hash -688149249, now seen corresponding path program 89 times [2022-03-20 12:48:27,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:48:27,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1107143993] [2022-03-20 12:48:27,621 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:48:27,621 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:48:27,621 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:48:27,621 INFO L85 PathProgramCache]: Analyzing trace with hash -688149249, now seen corresponding path program 90 times [2022-03-20 12:48:27,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:48:27,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628846234] [2022-03-20 12:48:27,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:48:27,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:48:27,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:48:28,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:48:28,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:48:28,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 329 [2022-03-20 12:48:28,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:48:28,474 INFO L134 CoverageAnalysis]: Checked inductivity of 7383 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 5267 trivial. 0 not checked. [2022-03-20 12:48:28,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:48:28,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628846234] [2022-03-20 12:48:28,474 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628846234] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:48:28,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950140756] [2022-03-20 12:48:28,474 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 12:48:28,474 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:48:28,474 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:48:28,475 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 12:48:28,477 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-03-20 12:48:28,790 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 12:48:28,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:48:28,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 12:48:28,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:48:29,303 INFO L134 CoverageAnalysis]: Checked inductivity of 7383 backedges. 181 proven. 1 refuted. 0 times theorem prover too weak. 7201 trivial. 0 not checked. [2022-03-20 12:48:29,303 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:48:29,729 INFO L134 CoverageAnalysis]: Checked inductivity of 7383 backedges. 181 proven. 1 refuted. 0 times theorem prover too weak. 7201 trivial. 0 not checked. [2022-03-20 12:48:29,730 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [950140756] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:48:29,730 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:48:29,730 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 7, 7] total 59 [2022-03-20 12:48:29,730 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:48:29,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1107143993] [2022-03-20 12:48:29,730 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1107143993] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:48:29,730 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:48:29,730 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [51] imperfect sequences [] total 51 [2022-03-20 12:48:29,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655473497] [2022-03-20 12:48:29,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:48:29,731 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-03-20 12:48:29,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:48:29,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-03-20 12:48:29,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1205, Invalid=2217, Unknown=0, NotChecked=0, Total=3422 [2022-03-20 12:48:29,732 INFO L87 Difference]: Start difference. First operand 1084 states and 1545 transitions. Second operand has 51 states, 51 states have (on average 2.215686274509804) internal successors, (113), 49 states have internal predecessors, (113), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 12:48:32,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:48:32,531 INFO L93 Difference]: Finished difference Result 2124 states and 3118 transitions. [2022-03-20 12:48:32,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-03-20 12:48:32,532 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.215686274509804) internal successors, (113), 49 states have internal predecessors, (113), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 344 [2022-03-20 12:48:32,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:48:32,534 INFO L225 Difference]: With dead ends: 2124 [2022-03-20 12:48:32,534 INFO L226 Difference]: Without dead ends: 1139 [2022-03-20 12:48:32,536 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 790 GetRequests, 683 SyntacticMatches, 1 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1737 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=3658, Invalid=7898, Unknown=0, NotChecked=0, Total=11556 [2022-03-20 12:48:32,536 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 2873 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 2684 mSolverCounterSat, 1231 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2877 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 3915 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1231 IncrementalHoareTripleChecker+Valid, 2684 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-20 12:48:32,537 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2877 Valid, 59 Invalid, 3915 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1231 Valid, 2684 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-03-20 12:48:32,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1139 states. [2022-03-20 12:48:32,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1139 to 1107. [2022-03-20 12:48:32,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1107 states, 958 states have (on average 1.3486430062630481) internal successors, (1292), 958 states have internal predecessors, (1292), 144 states have call successors, (144), 6 states have call predecessors, (144), 4 states have return successors, (142), 142 states have call predecessors, (142), 142 states have call successors, (142) [2022-03-20 12:48:32,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1107 states to 1107 states and 1578 transitions. [2022-03-20 12:48:32,890 INFO L78 Accepts]: Start accepts. Automaton has 1107 states and 1578 transitions. Word has length 344 [2022-03-20 12:48:32,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:48:32,891 INFO L478 AbstractCegarLoop]: Abstraction has 1107 states and 1578 transitions. [2022-03-20 12:48:32,891 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.215686274509804) internal successors, (113), 49 states have internal predecessors, (113), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 12:48:32,891 INFO L276 IsEmpty]: Start isEmpty. Operand 1107 states and 1578 transitions. [2022-03-20 12:48:32,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 352 [2022-03-20 12:48:32,893 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:48:32,893 INFO L499 BasicCegarLoop]: trace histogram [47, 47, 47, 47, 47, 47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:48:32,911 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-03-20 12:48:33,110 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:48:33,110 INFO L403 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:48:33,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:48:33,111 INFO L85 PathProgramCache]: Analyzing trace with hash -1835492499, now seen corresponding path program 91 times [2022-03-20 12:48:33,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:48:33,111 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1641648742] [2022-03-20 12:48:33,112 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:48:33,112 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:48:33,112 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:48:33,112 INFO L85 PathProgramCache]: Analyzing trace with hash -1835492499, now seen corresponding path program 92 times [2022-03-20 12:48:33,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:48:33,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570531799] [2022-03-20 12:48:33,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:48:33,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:48:33,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:48:33,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:48:33,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:48:33,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 336 [2022-03-20 12:48:33,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:48:33,999 INFO L134 CoverageAnalysis]: Checked inductivity of 7708 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 5499 trivial. 0 not checked. [2022-03-20 12:48:33,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:48:33,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570531799] [2022-03-20 12:48:33,999 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570531799] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:48:33,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [793917758] [2022-03-20 12:48:33,999 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 12:48:33,999 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:48:33,999 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:48:34,000 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 12:48:34,001 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-03-20 12:48:34,395 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 12:48:34,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:48:34,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 1332 conjuncts, 49 conjunts are in the unsatisfiable core [2022-03-20 12:48:34,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:48:34,649 INFO L134 CoverageAnalysis]: Checked inductivity of 7708 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 5499 trivial. 0 not checked. [2022-03-20 12:48:34,649 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:48:36,275 INFO L134 CoverageAnalysis]: Checked inductivity of 7708 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 5499 trivial. 0 not checked. [2022-03-20 12:48:36,275 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [793917758] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:48:36,275 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:48:36,275 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 50, 50] total 101 [2022-03-20 12:48:36,276 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:48:36,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1641648742] [2022-03-20 12:48:36,276 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1641648742] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:48:36,276 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:48:36,276 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [52] imperfect sequences [] total 52 [2022-03-20 12:48:36,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080802245] [2022-03-20 12:48:36,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:48:36,276 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-03-20 12:48:36,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:48:36,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-03-20 12:48:36,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4855, Invalid=5245, Unknown=0, NotChecked=0, Total=10100 [2022-03-20 12:48:36,279 INFO L87 Difference]: Start difference. First operand 1107 states and 1578 transitions. Second operand has 52 states, 52 states have (on average 2.2115384615384617) internal successors, (115), 50 states have internal predecessors, (115), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 12:48:39,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:48:39,693 INFO L93 Difference]: Finished difference Result 2168 states and 3183 transitions. [2022-03-20 12:48:39,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-03-20 12:48:39,693 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.2115384615384617) internal successors, (115), 50 states have internal predecessors, (115), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 351 [2022-03-20 12:48:39,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:48:39,696 INFO L225 Difference]: With dead ends: 2168 [2022-03-20 12:48:39,696 INFO L226 Difference]: Without dead ends: 1162 [2022-03-20 12:48:39,698 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 806 GetRequests, 657 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1600 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=9762, Invalid=12888, Unknown=0, NotChecked=0, Total=22650 [2022-03-20 12:48:39,698 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 3131 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 2434 mSolverCounterSat, 1429 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3135 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 3863 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1429 IncrementalHoareTripleChecker+Valid, 2434 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-03-20 12:48:39,698 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [3135 Valid, 47 Invalid, 3863 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1429 Valid, 2434 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-03-20 12:48:39,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1162 states. [2022-03-20 12:48:40,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1162 to 1130. [2022-03-20 12:48:40,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1130 states, 978 states have (on average 1.3486707566462168) internal successors, (1319), 978 states have internal predecessors, (1319), 147 states have call successors, (147), 6 states have call predecessors, (147), 4 states have return successors, (145), 145 states have call predecessors, (145), 145 states have call successors, (145) [2022-03-20 12:48:40,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1130 states to 1130 states and 1611 transitions. [2022-03-20 12:48:40,072 INFO L78 Accepts]: Start accepts. Automaton has 1130 states and 1611 transitions. Word has length 351 [2022-03-20 12:48:40,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:48:40,072 INFO L478 AbstractCegarLoop]: Abstraction has 1130 states and 1611 transitions. [2022-03-20 12:48:40,072 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.2115384615384617) internal successors, (115), 50 states have internal predecessors, (115), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 12:48:40,072 INFO L276 IsEmpty]: Start isEmpty. Operand 1130 states and 1611 transitions. [2022-03-20 12:48:40,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 359 [2022-03-20 12:48:40,074 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:48:40,075 INFO L499 BasicCegarLoop]: trace histogram [48, 48, 48, 48, 48, 48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:48:40,093 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-03-20 12:48:40,282 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-03-20 12:48:40,282 INFO L403 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:48:40,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:48:40,282 INFO L85 PathProgramCache]: Analyzing trace with hash -1861561405, now seen corresponding path program 93 times [2022-03-20 12:48:40,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:48:40,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1162683554] [2022-03-20 12:48:40,284 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:48:40,284 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:48:40,284 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:48:40,284 INFO L85 PathProgramCache]: Analyzing trace with hash -1861561405, now seen corresponding path program 94 times [2022-03-20 12:48:40,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:48:40,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275465954] [2022-03-20 12:48:40,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:48:40,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:48:40,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:48:41,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:48:41,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:48:41,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 343 [2022-03-20 12:48:41,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:48:41,196 INFO L134 CoverageAnalysis]: Checked inductivity of 8040 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 5736 trivial. 0 not checked. [2022-03-20 12:48:41,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:48:41,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275465954] [2022-03-20 12:48:41,196 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275465954] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:48:41,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845967267] [2022-03-20 12:48:41,196 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 12:48:41,196 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:48:41,196 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:48:41,197 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 12:48:41,200 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-03-20 12:48:41,607 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 12:48:41,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:48:41,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 1358 conjuncts, 50 conjunts are in the unsatisfiable core [2022-03-20 12:48:41,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:48:41,848 INFO L134 CoverageAnalysis]: Checked inductivity of 8040 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 5736 trivial. 0 not checked. [2022-03-20 12:48:41,848 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:48:43,504 INFO L134 CoverageAnalysis]: Checked inductivity of 8040 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 5736 trivial. 0 not checked. [2022-03-20 12:48:43,504 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [845967267] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:48:43,505 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:48:43,505 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 51, 51] total 103 [2022-03-20 12:48:43,505 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:48:43,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1162683554] [2022-03-20 12:48:43,505 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1162683554] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:48:43,505 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:48:43,505 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2022-03-20 12:48:43,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109670981] [2022-03-20 12:48:43,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:48:43,506 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-03-20 12:48:43,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:48:43,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-03-20 12:48:43,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5054, Invalid=5452, Unknown=0, NotChecked=0, Total=10506 [2022-03-20 12:48:43,508 INFO L87 Difference]: Start difference. First operand 1130 states and 1611 transitions. Second operand has 53 states, 53 states have (on average 2.207547169811321) internal successors, (117), 51 states have internal predecessors, (117), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 12:48:46,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:48:46,987 INFO L93 Difference]: Finished difference Result 2212 states and 3248 transitions. [2022-03-20 12:48:46,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-03-20 12:48:46,987 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.207547169811321) internal successors, (117), 51 states have internal predecessors, (117), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 358 [2022-03-20 12:48:46,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:48:46,990 INFO L225 Difference]: With dead ends: 2212 [2022-03-20 12:48:46,990 INFO L226 Difference]: Without dead ends: 1185 [2022-03-20 12:48:46,992 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 822 GetRequests, 670 SyntacticMatches, 0 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1658 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=10161, Invalid=13401, Unknown=0, NotChecked=0, Total=23562 [2022-03-20 12:48:46,992 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 2748 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 2668 mSolverCounterSat, 1265 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2752 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 3933 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1265 IncrementalHoareTripleChecker+Valid, 2668 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-03-20 12:48:46,992 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2752 Valid, 49 Invalid, 3933 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1265 Valid, 2668 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-03-20 12:48:46,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1185 states. [2022-03-20 12:48:47,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1185 to 1153. [2022-03-20 12:48:47,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1153 states, 998 states have (on average 1.348697394789579) internal successors, (1346), 998 states have internal predecessors, (1346), 150 states have call successors, (150), 6 states have call predecessors, (150), 4 states have return successors, (148), 148 states have call predecessors, (148), 148 states have call successors, (148) [2022-03-20 12:48:47,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1153 states to 1153 states and 1644 transitions. [2022-03-20 12:48:47,378 INFO L78 Accepts]: Start accepts. Automaton has 1153 states and 1644 transitions. Word has length 358 [2022-03-20 12:48:47,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:48:47,378 INFO L478 AbstractCegarLoop]: Abstraction has 1153 states and 1644 transitions. [2022-03-20 12:48:47,378 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.207547169811321) internal successors, (117), 51 states have internal predecessors, (117), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 12:48:47,378 INFO L276 IsEmpty]: Start isEmpty. Operand 1153 states and 1644 transitions. [2022-03-20 12:48:47,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 366 [2022-03-20 12:48:47,381 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:48:47,381 INFO L499 BasicCegarLoop]: trace histogram [49, 49, 49, 49, 49, 49, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:48:47,399 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-03-20 12:48:47,599 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:48:47,599 INFO L403 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:48:47,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:48:47,600 INFO L85 PathProgramCache]: Analyzing trace with hash -758414679, now seen corresponding path program 95 times [2022-03-20 12:48:47,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:48:47,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1146566701] [2022-03-20 12:48:47,601 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:48:47,601 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:48:47,601 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:48:47,601 INFO L85 PathProgramCache]: Analyzing trace with hash -758414679, now seen corresponding path program 96 times [2022-03-20 12:48:47,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:48:47,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601177316] [2022-03-20 12:48:47,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:48:47,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:48:47,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:48:48,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:48:48,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:48:48,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 350 [2022-03-20 12:48:48,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:48:48,525 INFO L134 CoverageAnalysis]: Checked inductivity of 8379 backedges. 0 proven. 2401 refuted. 0 times theorem prover too weak. 5978 trivial. 0 not checked. [2022-03-20 12:48:48,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:48:48,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601177316] [2022-03-20 12:48:48,525 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601177316] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:48:48,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533020109] [2022-03-20 12:48:48,526 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 12:48:48,526 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:48:48,526 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:48:48,527 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 12:48:48,528 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-03-20 12:48:48,859 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 12:48:48,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:48:48,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 12:48:48,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:48:49,429 INFO L134 CoverageAnalysis]: Checked inductivity of 8379 backedges. 193 proven. 1 refuted. 0 times theorem prover too weak. 8185 trivial. 0 not checked. [2022-03-20 12:48:49,429 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:48:49,890 INFO L134 CoverageAnalysis]: Checked inductivity of 8379 backedges. 193 proven. 1 refuted. 0 times theorem prover too weak. 8185 trivial. 0 not checked. [2022-03-20 12:48:49,890 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [533020109] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:48:49,890 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:48:49,890 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 7, 7] total 62 [2022-03-20 12:48:49,890 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:48:49,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1146566701] [2022-03-20 12:48:49,891 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1146566701] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:48:49,891 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:48:49,891 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [54] imperfect sequences [] total 54 [2022-03-20 12:48:49,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690388202] [2022-03-20 12:48:49,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:48:49,891 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-03-20 12:48:49,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:48:49,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-03-20 12:48:49,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1355, Invalid=2427, Unknown=0, NotChecked=0, Total=3782 [2022-03-20 12:48:49,893 INFO L87 Difference]: Start difference. First operand 1153 states and 1644 transitions. Second operand has 54 states, 54 states have (on average 2.2037037037037037) internal successors, (119), 52 states have internal predecessors, (119), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 12:48:53,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:48:53,251 INFO L93 Difference]: Finished difference Result 2256 states and 3313 transitions. [2022-03-20 12:48:53,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-03-20 12:48:53,252 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.2037037037037037) internal successors, (119), 52 states have internal predecessors, (119), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 365 [2022-03-20 12:48:53,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:48:53,254 INFO L225 Difference]: With dead ends: 2256 [2022-03-20 12:48:53,254 INFO L226 Difference]: Without dead ends: 1208 [2022-03-20 12:48:53,256 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 838 GetRequests, 725 SyntacticMatches, 1 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1923 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=4114, Invalid=8768, Unknown=0, NotChecked=0, Total=12882 [2022-03-20 12:48:53,256 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 3045 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 2778 mSolverCounterSat, 1339 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3049 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 4117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1339 IncrementalHoareTripleChecker+Valid, 2778 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-03-20 12:48:53,256 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [3049 Valid, 49 Invalid, 4117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1339 Valid, 2778 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-03-20 12:48:53,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1208 states. [2022-03-20 12:48:53,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1208 to 1176. [2022-03-20 12:48:53,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1176 states, 1018 states have (on average 1.3487229862475443) internal successors, (1373), 1018 states have internal predecessors, (1373), 153 states have call successors, (153), 6 states have call predecessors, (153), 4 states have return successors, (151), 151 states have call predecessors, (151), 151 states have call successors, (151) [2022-03-20 12:48:53,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1176 states to 1176 states and 1677 transitions. [2022-03-20 12:48:53,662 INFO L78 Accepts]: Start accepts. Automaton has 1176 states and 1677 transitions. Word has length 365 [2022-03-20 12:48:53,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:48:53,662 INFO L478 AbstractCegarLoop]: Abstraction has 1176 states and 1677 transitions. [2022-03-20 12:48:53,662 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.2037037037037037) internal successors, (119), 52 states have internal predecessors, (119), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 12:48:53,662 INFO L276 IsEmpty]: Start isEmpty. Operand 1176 states and 1677 transitions. [2022-03-20 12:48:53,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 373 [2022-03-20 12:48:53,665 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:48:53,665 INFO L499 BasicCegarLoop]: trace histogram [50, 50, 50, 50, 50, 50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:48:53,684 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-03-20 12:48:53,879 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2022-03-20 12:48:53,879 INFO L403 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:48:53,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:48:53,880 INFO L85 PathProgramCache]: Analyzing trace with hash 384675463, now seen corresponding path program 97 times [2022-03-20 12:48:53,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:48:53,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2033291597] [2022-03-20 12:48:53,881 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:48:53,881 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:48:53,881 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:48:53,881 INFO L85 PathProgramCache]: Analyzing trace with hash 384675463, now seen corresponding path program 98 times [2022-03-20 12:48:53,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:48:53,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857465874] [2022-03-20 12:48:53,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:48:53,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:48:53,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:48:54,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:48:54,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:48:54,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 357 [2022-03-20 12:48:54,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:48:54,857 INFO L134 CoverageAnalysis]: Checked inductivity of 8725 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 6225 trivial. 0 not checked. [2022-03-20 12:48:54,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:48:54,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857465874] [2022-03-20 12:48:54,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857465874] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:48:54,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388322039] [2022-03-20 12:48:54,857 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 12:48:54,857 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:48:54,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:48:54,858 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 12:48:54,859 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-03-20 12:48:55,298 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 12:48:55,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:48:55,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 1410 conjuncts, 52 conjunts are in the unsatisfiable core [2022-03-20 12:48:55,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:48:55,783 INFO L134 CoverageAnalysis]: Checked inductivity of 8725 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 6225 trivial. 0 not checked. [2022-03-20 12:48:55,783 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:48:57,957 INFO L134 CoverageAnalysis]: Checked inductivity of 8725 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 6225 trivial. 0 not checked. [2022-03-20 12:48:57,958 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [388322039] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:48:57,958 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:48:57,958 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 53, 53] total 107 [2022-03-20 12:48:57,959 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:48:57,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2033291597] [2022-03-20 12:48:57,959 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2033291597] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:48:57,959 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:48:57,959 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [55] imperfect sequences [] total 55 [2022-03-20 12:48:57,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887281396] [2022-03-20 12:48:57,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:48:57,959 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-03-20 12:48:57,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:48:57,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-03-20 12:48:57,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5464, Invalid=5878, Unknown=0, NotChecked=0, Total=11342 [2022-03-20 12:48:57,961 INFO L87 Difference]: Start difference. First operand 1176 states and 1677 transitions. Second operand has 55 states, 55 states have (on average 2.2) internal successors, (121), 53 states have internal predecessors, (121), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 12:49:01,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:49:01,610 INFO L93 Difference]: Finished difference Result 2300 states and 3378 transitions. [2022-03-20 12:49:01,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-03-20 12:49:01,610 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.2) internal successors, (121), 53 states have internal predecessors, (121), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 372 [2022-03-20 12:49:01,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:49:01,613 INFO L225 Difference]: With dead ends: 2300 [2022-03-20 12:49:01,613 INFO L226 Difference]: Without dead ends: 1231 [2022-03-20 12:49:01,615 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 854 GetRequests, 696 SyntacticMatches, 0 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1777 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=10983, Invalid=14457, Unknown=0, NotChecked=0, Total=25440 [2022-03-20 12:49:01,616 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 3237 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 2693 mSolverCounterSat, 1434 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3241 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 4127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1434 IncrementalHoareTripleChecker+Valid, 2693 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-03-20 12:49:01,616 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [3241 Valid, 47 Invalid, 4127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1434 Valid, 2693 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-03-20 12:49:01,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1231 states. [2022-03-20 12:49:02,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1231 to 1199. [2022-03-20 12:49:02,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1199 states, 1038 states have (on average 1.348747591522158) internal successors, (1400), 1038 states have internal predecessors, (1400), 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) [2022-03-20 12:49:02,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1199 states to 1199 states and 1710 transitions. [2022-03-20 12:49:02,055 INFO L78 Accepts]: Start accepts. Automaton has 1199 states and 1710 transitions. Word has length 372 [2022-03-20 12:49:02,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:49:02,056 INFO L478 AbstractCegarLoop]: Abstraction has 1199 states and 1710 transitions. [2022-03-20 12:49:02,056 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 2.2) internal successors, (121), 53 states have internal predecessors, (121), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 12:49:02,056 INFO L276 IsEmpty]: Start isEmpty. Operand 1199 states and 1710 transitions. [2022-03-20 12:49:02,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 380 [2022-03-20 12:49:02,058 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:49:02,059 INFO L499 BasicCegarLoop]: trace histogram [51, 51, 51, 51, 51, 51, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:49:02,078 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2022-03-20 12:49:02,263 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2022-03-20 12:49:02,264 INFO L403 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:49:02,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:49:02,264 INFO L85 PathProgramCache]: Analyzing trace with hash 315299301, now seen corresponding path program 99 times [2022-03-20 12:49:02,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:49:02,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1154540241] [2022-03-20 12:49:02,267 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:49:02,267 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:49:02,267 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:49:02,268 INFO L85 PathProgramCache]: Analyzing trace with hash 315299301, now seen corresponding path program 100 times [2022-03-20 12:49:02,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:49:02,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163796691] [2022-03-20 12:49:02,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:49:02,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:49:02,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:49:02,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:49:02,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:49:02,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 364 [2022-03-20 12:49:02,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:49:02,925 INFO L134 CoverageAnalysis]: Checked inductivity of 9078 backedges. 0 proven. 2601 refuted. 0 times theorem prover too weak. 6477 trivial. 0 not checked. [2022-03-20 12:49:02,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:49:02,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163796691] [2022-03-20 12:49:02,925 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163796691] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:49:02,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1837566504] [2022-03-20 12:49:02,925 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 12:49:02,925 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:49:02,926 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:49:02,927 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 12:49:02,927 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-03-20 12:49:03,350 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 12:49:03,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:49:03,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 1436 conjuncts, 53 conjunts are in the unsatisfiable core [2022-03-20 12:49:03,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:49:03,751 INFO L134 CoverageAnalysis]: Checked inductivity of 9078 backedges. 0 proven. 2601 refuted. 0 times theorem prover too weak. 6477 trivial. 0 not checked. [2022-03-20 12:49:03,752 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:49:06,278 INFO L134 CoverageAnalysis]: Checked inductivity of 9078 backedges. 0 proven. 2601 refuted. 0 times theorem prover too weak. 6477 trivial. 0 not checked. [2022-03-20 12:49:06,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1837566504] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:49:06,278 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:49:06,278 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 54, 54] total 109 [2022-03-20 12:49:06,279 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:49:06,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1154540241] [2022-03-20 12:49:06,279 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1154540241] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:49:06,279 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:49:06,279 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [56] imperfect sequences [] total 56 [2022-03-20 12:49:06,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570134105] [2022-03-20 12:49:06,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:49:06,279 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-03-20 12:49:06,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:49:06,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-03-20 12:49:06,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5675, Invalid=6097, Unknown=0, NotChecked=0, Total=11772 [2022-03-20 12:49:06,280 INFO L87 Difference]: Start difference. First operand 1199 states and 1710 transitions. Second operand has 56 states, 56 states have (on average 2.1964285714285716) internal successors, (123), 54 states have internal predecessors, (123), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 12:49:10,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:49:10,139 INFO L93 Difference]: Finished difference Result 2344 states and 3443 transitions. [2022-03-20 12:49:10,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-03-20 12:49:10,140 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.1964285714285716) internal successors, (123), 54 states have internal predecessors, (123), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 379 [2022-03-20 12:49:10,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:49:10,142 INFO L225 Difference]: With dead ends: 2344 [2022-03-20 12:49:10,142 INFO L226 Difference]: Without dead ends: 1254 [2022-03-20 12:49:10,144 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 870 GetRequests, 709 SyntacticMatches, 0 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1838 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=11406, Invalid=15000, Unknown=0, NotChecked=0, Total=26406 [2022-03-20 12:49:10,144 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 2966 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 3011 mSolverCounterSat, 1317 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2970 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 4328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1317 IncrementalHoareTripleChecker+Valid, 3011 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-03-20 12:49:10,145 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2970 Valid, 49 Invalid, 4328 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1317 Valid, 3011 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-03-20 12:49:10,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1254 states. [2022-03-20 12:49:10,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1254 to 1222. [2022-03-20 12:49:10,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1222 states, 1058 states have (on average 1.3487712665406428) internal successors, (1427), 1058 states have internal predecessors, (1427), 159 states have call successors, (159), 6 states have call predecessors, (159), 4 states have return successors, (157), 157 states have call predecessors, (157), 157 states have call successors, (157) [2022-03-20 12:49:10,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1222 states to 1222 states and 1743 transitions. [2022-03-20 12:49:10,588 INFO L78 Accepts]: Start accepts. Automaton has 1222 states and 1743 transitions. Word has length 379 [2022-03-20 12:49:10,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:49:10,588 INFO L478 AbstractCegarLoop]: Abstraction has 1222 states and 1743 transitions. [2022-03-20 12:49:10,589 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 2.1964285714285716) internal successors, (123), 54 states have internal predecessors, (123), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 12:49:10,589 INFO L276 IsEmpty]: Start isEmpty. Operand 1222 states and 1743 transitions. [2022-03-20 12:49:10,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 387 [2022-03-20 12:49:10,598 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:49:10,598 INFO L499 BasicCegarLoop]: trace histogram [52, 52, 52, 52, 52, 52, 52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:49:10,620 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2022-03-20 12:49:10,799 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:49:10,799 INFO L403 AbstractCegarLoop]: === Iteration 55 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:49:10,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:49:10,799 INFO L85 PathProgramCache]: Analyzing trace with hash -2096923317, now seen corresponding path program 101 times [2022-03-20 12:49:10,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:49:10,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1885333628] [2022-03-20 12:49:10,801 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:49:10,801 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:49:10,801 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:49:10,801 INFO L85 PathProgramCache]: Analyzing trace with hash -2096923317, now seen corresponding path program 102 times [2022-03-20 12:49:10,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:49:10,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252822174] [2022-03-20 12:49:10,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:49:10,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:49:10,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:49:11,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:49:11,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:49:11,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 371 [2022-03-20 12:49:11,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:49:11,805 INFO L134 CoverageAnalysis]: Checked inductivity of 9438 backedges. 0 proven. 2704 refuted. 0 times theorem prover too weak. 6734 trivial. 0 not checked. [2022-03-20 12:49:11,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:49:11,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252822174] [2022-03-20 12:49:11,805 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252822174] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:49:11,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453132155] [2022-03-20 12:49:11,805 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 12:49:11,805 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:49:11,806 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:49:11,808 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 12:49:11,808 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-03-20 12:49:12,164 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 12:49:12,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:49:12,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 12:49:12,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:49:12,735 INFO L134 CoverageAnalysis]: Checked inductivity of 9438 backedges. 205 proven. 1 refuted. 0 times theorem prover too weak. 9232 trivial. 0 not checked. [2022-03-20 12:49:12,736 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:49:13,076 INFO L134 CoverageAnalysis]: Checked inductivity of 9438 backedges. 205 proven. 1 refuted. 0 times theorem prover too weak. 9232 trivial. 0 not checked. [2022-03-20 12:49:13,076 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1453132155] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:49:13,076 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:49:13,077 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 7, 7] total 65 [2022-03-20 12:49:13,077 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:49:13,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1885333628] [2022-03-20 12:49:13,077 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1885333628] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:49:13,077 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:49:13,077 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [57] imperfect sequences [] total 57 [2022-03-20 12:49:13,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778328597] [2022-03-20 12:49:13,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:49:13,077 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-03-20 12:49:13,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:49:13,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-03-20 12:49:13,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1514, Invalid=2646, Unknown=0, NotChecked=0, Total=4160 [2022-03-20 12:49:13,079 INFO L87 Difference]: Start difference. First operand 1222 states and 1743 transitions. Second operand has 57 states, 57 states have (on average 2.192982456140351) internal successors, (125), 55 states have internal predecessors, (125), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 12:49:16,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:49:16,380 INFO L93 Difference]: Finished difference Result 2388 states and 3508 transitions. [2022-03-20 12:49:16,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-03-20 12:49:16,380 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.192982456140351) internal successors, (125), 55 states have internal predecessors, (125), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 386 [2022-03-20 12:49:16,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:49:16,383 INFO L225 Difference]: With dead ends: 2388 [2022-03-20 12:49:16,383 INFO L226 Difference]: Without dead ends: 1277 [2022-03-20 12:49:16,385 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 886 GetRequests, 767 SyntacticMatches, 1 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2118 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=4597, Invalid=9683, Unknown=0, NotChecked=0, Total=14280 [2022-03-20 12:49:16,385 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 3038 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 2996 mSolverCounterSat, 1397 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3042 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 4393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1397 IncrementalHoareTripleChecker+Valid, 2996 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-03-20 12:49:16,385 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [3042 Valid, 53 Invalid, 4393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1397 Valid, 2996 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-03-20 12:49:16,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1277 states. [2022-03-20 12:49:16,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1277 to 1245. [2022-03-20 12:49:16,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1245 states, 1078 states have (on average 1.3487940630797774) internal successors, (1454), 1078 states have internal predecessors, (1454), 162 states have call successors, (162), 6 states have call predecessors, (162), 4 states have return successors, (160), 160 states have call predecessors, (160), 160 states have call successors, (160) [2022-03-20 12:49:16,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1245 states to 1245 states and 1776 transitions. [2022-03-20 12:49:16,846 INFO L78 Accepts]: Start accepts. Automaton has 1245 states and 1776 transitions. Word has length 386 [2022-03-20 12:49:16,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:49:16,846 INFO L478 AbstractCegarLoop]: Abstraction has 1245 states and 1776 transitions. [2022-03-20 12:49:16,846 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 2.192982456140351) internal successors, (125), 55 states have internal predecessors, (125), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 12:49:16,847 INFO L276 IsEmpty]: Start isEmpty. Operand 1245 states and 1776 transitions. [2022-03-20 12:49:16,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 394 [2022-03-20 12:49:16,850 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:49:16,850 INFO L499 BasicCegarLoop]: trace histogram [53, 53, 53, 53, 53, 53, 53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:49:16,868 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2022-03-20 12:49:17,063 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2022-03-20 12:49:17,063 INFO L403 AbstractCegarLoop]: === Iteration 56 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:49:17,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:49:17,064 INFO L85 PathProgramCache]: Analyzing trace with hash -529001183, now seen corresponding path program 103 times [2022-03-20 12:49:17,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:49:17,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1190037974] [2022-03-20 12:49:17,065 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:49:17,065 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:49:17,065 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:49:17,065 INFO L85 PathProgramCache]: Analyzing trace with hash -529001183, now seen corresponding path program 104 times [2022-03-20 12:49:17,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:49:17,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128803090] [2022-03-20 12:49:17,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:49:17,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:49:17,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:49:18,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:49:18,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:49:18,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 378 [2022-03-20 12:49:18,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:49:18,060 INFO L134 CoverageAnalysis]: Checked inductivity of 9805 backedges. 0 proven. 2809 refuted. 0 times theorem prover too weak. 6996 trivial. 0 not checked. [2022-03-20 12:49:18,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:49:18,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128803090] [2022-03-20 12:49:18,060 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128803090] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:49:18,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1809571709] [2022-03-20 12:49:18,061 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 12:49:18,061 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:49:18,061 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:49:18,062 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 12:49:18,063 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-03-20 12:49:18,539 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 12:49:18,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:49:18,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 1488 conjuncts, 55 conjunts are in the unsatisfiable core [2022-03-20 12:49:18,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:49:18,895 INFO L134 CoverageAnalysis]: Checked inductivity of 9805 backedges. 0 proven. 2809 refuted. 0 times theorem prover too weak. 6996 trivial. 0 not checked. [2022-03-20 12:49:18,895 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:49:21,612 INFO L134 CoverageAnalysis]: Checked inductivity of 9805 backedges. 0 proven. 2809 refuted. 0 times theorem prover too weak. 6996 trivial. 0 not checked. [2022-03-20 12:49:21,612 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1809571709] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:49:21,612 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:49:21,612 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 56, 56] total 113 [2022-03-20 12:49:21,613 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:49:21,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1190037974] [2022-03-20 12:49:21,613 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1190037974] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:49:21,613 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:49:21,613 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [58] imperfect sequences [] total 58 [2022-03-20 12:49:21,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345386262] [2022-03-20 12:49:21,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:49:21,613 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-03-20 12:49:21,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:49:21,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-03-20 12:49:21,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6109, Invalid=6547, Unknown=0, NotChecked=0, Total=12656 [2022-03-20 12:49:21,615 INFO L87 Difference]: Start difference. First operand 1245 states and 1776 transitions. Second operand has 58 states, 58 states have (on average 2.189655172413793) internal successors, (127), 56 states have internal predecessors, (127), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 12:49:26,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:49:26,281 INFO L93 Difference]: Finished difference Result 2432 states and 3573 transitions. [2022-03-20 12:49:26,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-03-20 12:49:26,282 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 2.189655172413793) internal successors, (127), 56 states have internal predecessors, (127), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 393 [2022-03-20 12:49:26,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:49:26,284 INFO L225 Difference]: With dead ends: 2432 [2022-03-20 12:49:26,284 INFO L226 Difference]: Without dead ends: 1300 [2022-03-20 12:49:26,287 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 902 GetRequests, 735 SyntacticMatches, 0 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1963 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=12276, Invalid=16116, Unknown=0, NotChecked=0, Total=28392 [2022-03-20 12:49:26,288 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 3112 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 3177 mSolverCounterSat, 1374 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3116 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 4551 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1374 IncrementalHoareTripleChecker+Valid, 3177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-03-20 12:49:26,288 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [3116 Valid, 49 Invalid, 4551 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1374 Valid, 3177 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-03-20 12:49:26,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1300 states. [2022-03-20 12:49:26,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1300 to 1268. [2022-03-20 12:49:26,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1268 states, 1098 states have (on average 1.348816029143898) internal successors, (1481), 1098 states have internal predecessors, (1481), 165 states have call successors, (165), 6 states have call predecessors, (165), 4 states have return successors, (163), 163 states have call predecessors, (163), 163 states have call successors, (163) [2022-03-20 12:49:26,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1268 states to 1268 states and 1809 transitions. [2022-03-20 12:49:26,767 INFO L78 Accepts]: Start accepts. Automaton has 1268 states and 1809 transitions. Word has length 393 [2022-03-20 12:49:26,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:49:26,767 INFO L478 AbstractCegarLoop]: Abstraction has 1268 states and 1809 transitions. [2022-03-20 12:49:26,767 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 2.189655172413793) internal successors, (127), 56 states have internal predecessors, (127), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 12:49:26,767 INFO L276 IsEmpty]: Start isEmpty. Operand 1268 states and 1809 transitions. [2022-03-20 12:49:26,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 401 [2022-03-20 12:49:26,770 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:49:26,770 INFO L499 BasicCegarLoop]: trace histogram [54, 54, 54, 54, 54, 54, 54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:49:26,792 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2022-03-20 12:49:26,985 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2022-03-20 12:49:26,985 INFO L403 AbstractCegarLoop]: === Iteration 57 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:49:26,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:49:26,986 INFO L85 PathProgramCache]: Analyzing trace with hash 1210810383, now seen corresponding path program 105 times [2022-03-20 12:49:26,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:49:26,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1887187055] [2022-03-20 12:49:26,987 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:49:26,987 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:49:26,987 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:49:26,987 INFO L85 PathProgramCache]: Analyzing trace with hash 1210810383, now seen corresponding path program 106 times [2022-03-20 12:49:26,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:49:26,987 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857462786] [2022-03-20 12:49:26,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:49:26,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:49:27,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:49:28,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:49:28,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:49:28,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 385 [2022-03-20 12:49:28,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:49:28,072 INFO L134 CoverageAnalysis]: Checked inductivity of 10179 backedges. 0 proven. 2916 refuted. 0 times theorem prover too weak. 7263 trivial. 0 not checked. [2022-03-20 12:49:28,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:49:28,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857462786] [2022-03-20 12:49:28,072 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857462786] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:49:28,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1329501729] [2022-03-20 12:49:28,072 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 12:49:28,072 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:49:28,072 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:49:28,073 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 12:49:28,074 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-03-20 12:49:28,532 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 12:49:28,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:49:28,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 1514 conjuncts, 56 conjunts are in the unsatisfiable core [2022-03-20 12:49:28,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:49:28,862 INFO L134 CoverageAnalysis]: Checked inductivity of 10179 backedges. 0 proven. 2916 refuted. 0 times theorem prover too weak. 7263 trivial. 0 not checked. [2022-03-20 12:49:28,863 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:49:30,816 INFO L134 CoverageAnalysis]: Checked inductivity of 10179 backedges. 0 proven. 2916 refuted. 0 times theorem prover too weak. 7263 trivial. 0 not checked. [2022-03-20 12:49:30,816 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1329501729] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:49:30,816 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:49:30,816 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 57, 57] total 115 [2022-03-20 12:49:30,817 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:49:30,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1887187055] [2022-03-20 12:49:30,817 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1887187055] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:49:30,817 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:49:30,817 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [59] imperfect sequences [] total 59 [2022-03-20 12:49:30,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178733225] [2022-03-20 12:49:30,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:49:30,817 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-03-20 12:49:30,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:49:30,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-03-20 12:49:30,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6332, Invalid=6778, Unknown=0, NotChecked=0, Total=13110 [2022-03-20 12:49:30,819 INFO L87 Difference]: Start difference. First operand 1268 states and 1809 transitions. Second operand has 59 states, 59 states have (on average 2.1864406779661016) internal successors, (129), 57 states have internal predecessors, (129), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 12:49:34,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:49:34,924 INFO L93 Difference]: Finished difference Result 2476 states and 3638 transitions. [2022-03-20 12:49:34,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-03-20 12:49:34,925 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 2.1864406779661016) internal successors, (129), 57 states have internal predecessors, (129), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 400 [2022-03-20 12:49:34,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:49:34,927 INFO L225 Difference]: With dead ends: 2476 [2022-03-20 12:49:34,927 INFO L226 Difference]: Without dead ends: 1323 [2022-03-20 12:49:34,930 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 918 GetRequests, 748 SyntacticMatches, 0 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2027 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=12723, Invalid=16689, Unknown=0, NotChecked=0, Total=29412 [2022-03-20 12:49:34,930 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 2878 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 3455 mSolverCounterSat, 1283 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2882 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 4738 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1283 IncrementalHoareTripleChecker+Valid, 3455 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-03-20 12:49:34,931 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2882 Valid, 57 Invalid, 4738 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1283 Valid, 3455 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-03-20 12:49:34,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1323 states. [2022-03-20 12:49:35,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1323 to 1291. [2022-03-20 12:49:35,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1291 states, 1118 states have (on average 1.3488372093023255) internal successors, (1508), 1118 states have internal predecessors, (1508), 168 states have call successors, (168), 6 states have call predecessors, (168), 4 states have return successors, (166), 166 states have call predecessors, (166), 166 states have call successors, (166) [2022-03-20 12:49:35,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1291 states to 1291 states and 1842 transitions. [2022-03-20 12:49:35,426 INFO L78 Accepts]: Start accepts. Automaton has 1291 states and 1842 transitions. Word has length 400 [2022-03-20 12:49:35,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:49:35,426 INFO L478 AbstractCegarLoop]: Abstraction has 1291 states and 1842 transitions. [2022-03-20 12:49:35,426 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 2.1864406779661016) internal successors, (129), 57 states have internal predecessors, (129), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 12:49:35,426 INFO L276 IsEmpty]: Start isEmpty. Operand 1291 states and 1842 transitions. [2022-03-20 12:49:35,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 408 [2022-03-20 12:49:35,429 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:49:35,429 INFO L499 BasicCegarLoop]: trace histogram [55, 55, 55, 55, 55, 55, 55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:49:35,450 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2022-03-20 12:49:35,648 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:49:35,648 INFO L403 AbstractCegarLoop]: === Iteration 58 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:49:35,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:49:35,648 INFO L85 PathProgramCache]: Analyzing trace with hash -1624031139, now seen corresponding path program 107 times [2022-03-20 12:49:35,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:49:35,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2107013426] [2022-03-20 12:49:35,650 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:49:35,650 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:49:35,650 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:49:35,650 INFO L85 PathProgramCache]: Analyzing trace with hash -1624031139, now seen corresponding path program 108 times [2022-03-20 12:49:35,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:49:35,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569373416] [2022-03-20 12:49:35,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:49:35,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:49:35,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:49:36,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:49:36,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:49:36,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 392 [2022-03-20 12:49:36,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:49:36,335 INFO L134 CoverageAnalysis]: Checked inductivity of 10560 backedges. 0 proven. 3025 refuted. 0 times theorem prover too weak. 7535 trivial. 0 not checked. [2022-03-20 12:49:36,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:49:36,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569373416] [2022-03-20 12:49:36,335 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569373416] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:49:36,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251213506] [2022-03-20 12:49:36,335 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 12:49:36,335 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:49:36,335 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:49:36,336 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 12:49:36,337 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-03-20 12:49:36,720 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 12:49:36,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:49:36,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 12:49:36,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:49:37,022 INFO L134 CoverageAnalysis]: Checked inductivity of 10560 backedges. 217 proven. 1 refuted. 0 times theorem prover too weak. 10342 trivial. 0 not checked. [2022-03-20 12:49:37,022 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:49:37,325 INFO L134 CoverageAnalysis]: Checked inductivity of 10560 backedges. 217 proven. 1 refuted. 0 times theorem prover too weak. 10342 trivial. 0 not checked. [2022-03-20 12:49:37,326 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1251213506] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:49:37,326 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:49:37,326 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 7, 7] total 68 [2022-03-20 12:49:37,326 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:49:37,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2107013426] [2022-03-20 12:49:37,326 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2107013426] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:49:37,326 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:49:37,326 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [60] imperfect sequences [] total 60 [2022-03-20 12:49:37,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628761814] [2022-03-20 12:49:37,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:49:37,327 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-03-20 12:49:37,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:49:37,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-03-20 12:49:37,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1682, Invalid=2874, Unknown=0, NotChecked=0, Total=4556 [2022-03-20 12:49:37,328 INFO L87 Difference]: Start difference. First operand 1291 states and 1842 transitions. Second operand has 60 states, 60 states have (on average 2.183333333333333) internal successors, (131), 58 states have internal predecessors, (131), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 12:49:41,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:49:41,592 INFO L93 Difference]: Finished difference Result 2520 states and 3703 transitions. [2022-03-20 12:49:41,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-03-20 12:49:41,593 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 2.183333333333333) internal successors, (131), 58 states have internal predecessors, (131), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 407 [2022-03-20 12:49:41,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:49:41,595 INFO L225 Difference]: With dead ends: 2520 [2022-03-20 12:49:41,595 INFO L226 Difference]: Without dead ends: 1346 [2022-03-20 12:49:41,599 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 934 GetRequests, 809 SyntacticMatches, 1 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2322 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=5107, Invalid=10643, Unknown=0, NotChecked=0, Total=15750 [2022-03-20 12:49:41,599 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 3339 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 3192 mSolverCounterSat, 1532 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3343 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 4724 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1532 IncrementalHoareTripleChecker+Valid, 3192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-03-20 12:49:41,599 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [3343 Valid, 57 Invalid, 4724 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1532 Valid, 3192 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-03-20 12:49:41,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1346 states. [2022-03-20 12:49:42,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1346 to 1314. [2022-03-20 12:49:42,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1314 states, 1138 states have (on average 1.3488576449912126) internal successors, (1535), 1138 states have internal predecessors, (1535), 171 states have call successors, (171), 6 states have call predecessors, (171), 4 states have return successors, (169), 169 states have call predecessors, (169), 169 states have call successors, (169) [2022-03-20 12:49:42,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1314 states to 1314 states and 1875 transitions. [2022-03-20 12:49:42,112 INFO L78 Accepts]: Start accepts. Automaton has 1314 states and 1875 transitions. Word has length 407 [2022-03-20 12:49:42,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:49:42,112 INFO L478 AbstractCegarLoop]: Abstraction has 1314 states and 1875 transitions. [2022-03-20 12:49:42,112 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 2.183333333333333) internal successors, (131), 58 states have internal predecessors, (131), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 12:49:42,113 INFO L276 IsEmpty]: Start isEmpty. Operand 1314 states and 1875 transitions. [2022-03-20 12:49:42,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 415 [2022-03-20 12:49:42,128 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:49:42,129 INFO L499 BasicCegarLoop]: trace histogram [56, 56, 56, 56, 56, 56, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:49:42,148 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2022-03-20 12:49:42,343 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:49:42,343 INFO L403 AbstractCegarLoop]: === Iteration 59 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:49:42,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:49:42,344 INFO L85 PathProgramCache]: Analyzing trace with hash -708512045, now seen corresponding path program 109 times [2022-03-20 12:49:42,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:49:42,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1769174575] [2022-03-20 12:49:42,345 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:49:42,345 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:49:42,345 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:49:42,345 INFO L85 PathProgramCache]: Analyzing trace with hash -708512045, now seen corresponding path program 110 times [2022-03-20 12:49:42,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:49:42,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233780020] [2022-03-20 12:49:42,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:49:42,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:49:42,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:49:43,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:49:43,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:49:43,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 399 [2022-03-20 12:49:43,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:49:43,293 INFO L134 CoverageAnalysis]: Checked inductivity of 10948 backedges. 0 proven. 3136 refuted. 0 times theorem prover too weak. 7812 trivial. 0 not checked. [2022-03-20 12:49:43,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:49:43,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233780020] [2022-03-20 12:49:43,294 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233780020] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:49:43,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010603015] [2022-03-20 12:49:43,294 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 12:49:43,294 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:49:43,294 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:49:43,295 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 12:49:43,296 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-03-20 12:49:43,799 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 12:49:43,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:49:43,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 1566 conjuncts, 58 conjunts are in the unsatisfiable core [2022-03-20 12:49:43,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:49:44,078 INFO L134 CoverageAnalysis]: Checked inductivity of 10948 backedges. 0 proven. 3136 refuted. 0 times theorem prover too weak. 7812 trivial. 0 not checked. [2022-03-20 12:49:44,078 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:49:46,471 INFO L134 CoverageAnalysis]: Checked inductivity of 10948 backedges. 0 proven. 3136 refuted. 0 times theorem prover too weak. 7812 trivial. 0 not checked. [2022-03-20 12:49:46,471 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1010603015] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:49:46,471 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:49:46,471 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 59, 59] total 119 [2022-03-20 12:49:46,471 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:49:46,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1769174575] [2022-03-20 12:49:46,471 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1769174575] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:49:46,471 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:49:46,471 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [61] imperfect sequences [] total 61 [2022-03-20 12:49:46,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344962815] [2022-03-20 12:49:46,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:49:46,472 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-03-20 12:49:46,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:49:46,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-03-20 12:49:46,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6790, Invalid=7252, Unknown=0, NotChecked=0, Total=14042 [2022-03-20 12:49:46,474 INFO L87 Difference]: Start difference. First operand 1314 states and 1875 transitions. Second operand has 61 states, 61 states have (on average 2.180327868852459) internal successors, (133), 59 states have internal predecessors, (133), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 12:49:51,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:49:51,506 INFO L93 Difference]: Finished difference Result 2564 states and 3768 transitions. [2022-03-20 12:49:51,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-03-20 12:49:51,506 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 2.180327868852459) internal successors, (133), 59 states have internal predecessors, (133), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 414 [2022-03-20 12:49:51,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:49:51,509 INFO L225 Difference]: With dead ends: 2564 [2022-03-20 12:49:51,509 INFO L226 Difference]: Without dead ends: 1369 [2022-03-20 12:49:51,512 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 950 GetRequests, 774 SyntacticMatches, 0 SemanticMatches, 176 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2158 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=13641, Invalid=17865, Unknown=0, NotChecked=0, Total=31506 [2022-03-20 12:49:51,512 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 3477 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 3156 mSolverCounterSat, 1615 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3481 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 4771 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1615 IncrementalHoareTripleChecker+Valid, 3156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-03-20 12:49:51,512 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [3481 Valid, 51 Invalid, 4771 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1615 Valid, 3156 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-03-20 12:49:51,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1369 states. [2022-03-20 12:49:52,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1369 to 1337. [2022-03-20 12:49:52,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1337 states, 1158 states have (on average 1.3488773747841105) internal successors, (1562), 1158 states have internal predecessors, (1562), 174 states have call successors, (174), 6 states have call predecessors, (174), 4 states have return successors, (172), 172 states have call predecessors, (172), 172 states have call successors, (172) [2022-03-20 12:49:52,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1337 states to 1337 states and 1908 transitions. [2022-03-20 12:49:52,043 INFO L78 Accepts]: Start accepts. Automaton has 1337 states and 1908 transitions. Word has length 414 [2022-03-20 12:49:52,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:49:52,043 INFO L478 AbstractCegarLoop]: Abstraction has 1337 states and 1908 transitions. [2022-03-20 12:49:52,043 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 2.180327868852459) internal successors, (133), 59 states have internal predecessors, (133), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 12:49:52,043 INFO L276 IsEmpty]: Start isEmpty. Operand 1337 states and 1908 transitions. [2022-03-20 12:49:52,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 422 [2022-03-20 12:49:52,046 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:49:52,047 INFO L499 BasicCegarLoop]: trace histogram [57, 57, 57, 57, 57, 57, 57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:49:52,068 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2022-03-20 12:49:52,266 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:49:52,266 INFO L403 AbstractCegarLoop]: === Iteration 60 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:49:52,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:49:52,266 INFO L85 PathProgramCache]: Analyzing trace with hash -472033383, now seen corresponding path program 111 times [2022-03-20 12:49:52,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:49:52,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [914832837] [2022-03-20 12:49:52,268 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:49:52,268 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:49:52,268 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:49:52,268 INFO L85 PathProgramCache]: Analyzing trace with hash -472033383, now seen corresponding path program 112 times [2022-03-20 12:49:52,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:49:52,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806428567] [2022-03-20 12:49:52,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:49:52,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:49:52,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:49:53,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:49:53,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:49:53,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 406 [2022-03-20 12:49:53,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:49:53,499 INFO L134 CoverageAnalysis]: Checked inductivity of 11343 backedges. 0 proven. 3249 refuted. 0 times theorem prover too weak. 8094 trivial. 0 not checked. [2022-03-20 12:49:53,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:49:53,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806428567] [2022-03-20 12:49:53,500 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806428567] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:49:53,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919510706] [2022-03-20 12:49:53,500 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 12:49:53,500 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:49:53,500 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:49:53,501 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 12:49:53,502 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-03-20 12:49:54,001 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 12:49:54,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:49:54,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 1592 conjuncts, 59 conjunts are in the unsatisfiable core [2022-03-20 12:49:54,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:49:54,513 INFO L134 CoverageAnalysis]: Checked inductivity of 11343 backedges. 0 proven. 3249 refuted. 0 times theorem prover too weak. 8094 trivial. 0 not checked. [2022-03-20 12:49:54,513 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:49:58,064 INFO L134 CoverageAnalysis]: Checked inductivity of 11343 backedges. 0 proven. 3249 refuted. 0 times theorem prover too weak. 8094 trivial. 0 not checked. [2022-03-20 12:49:58,065 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [919510706] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:49:58,065 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:49:58,065 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 60, 60] total 121 [2022-03-20 12:49:58,065 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:49:58,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [914832837] [2022-03-20 12:49:58,065 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [914832837] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:49:58,065 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:49:58,065 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [62] imperfect sequences [] total 62 [2022-03-20 12:49:58,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966876292] [2022-03-20 12:49:58,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:49:58,066 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-03-20 12:49:58,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:49:58,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-03-20 12:49:58,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7025, Invalid=7495, Unknown=0, NotChecked=0, Total=14520 [2022-03-20 12:49:58,067 INFO L87 Difference]: Start difference. First operand 1337 states and 1908 transitions. Second operand has 62 states, 62 states have (on average 2.1774193548387095) internal successors, (135), 60 states have internal predecessors, (135), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 12:50:02,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:50:02,480 INFO L93 Difference]: Finished difference Result 2608 states and 3833 transitions. [2022-03-20 12:50:02,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-03-20 12:50:02,484 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 2.1774193548387095) internal successors, (135), 60 states have internal predecessors, (135), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 421 [2022-03-20 12:50:02,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:50:02,510 INFO L225 Difference]: With dead ends: 2608 [2022-03-20 12:50:02,510 INFO L226 Difference]: Without dead ends: 1392 [2022-03-20 12:50:02,513 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 966 GetRequests, 787 SyntacticMatches, 0 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2225 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=14112, Invalid=18468, Unknown=0, NotChecked=0, Total=32580 [2022-03-20 12:50:02,514 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 3559 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 3184 mSolverCounterSat, 1618 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3563 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 4802 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1618 IncrementalHoareTripleChecker+Valid, 3184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-03-20 12:50:02,514 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [3563 Valid, 51 Invalid, 4802 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1618 Valid, 3184 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-03-20 12:50:02,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1392 states. [2022-03-20 12:50:03,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1392 to 1360. [2022-03-20 12:50:03,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1360 states, 1178 states have (on average 1.3488964346349746) internal successors, (1589), 1178 states have internal predecessors, (1589), 177 states have call successors, (177), 6 states have call predecessors, (177), 4 states have return successors, (175), 175 states have call predecessors, (175), 175 states have call successors, (175) [2022-03-20 12:50:03,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1360 states to 1360 states and 1941 transitions. [2022-03-20 12:50:03,255 INFO L78 Accepts]: Start accepts. Automaton has 1360 states and 1941 transitions. Word has length 421 [2022-03-20 12:50:03,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:50:03,255 INFO L478 AbstractCegarLoop]: Abstraction has 1360 states and 1941 transitions. [2022-03-20 12:50:03,255 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 2.1774193548387095) internal successors, (135), 60 states have internal predecessors, (135), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 12:50:03,255 INFO L276 IsEmpty]: Start isEmpty. Operand 1360 states and 1941 transitions. [2022-03-20 12:50:03,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 429 [2022-03-20 12:50:03,259 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:50:03,259 INFO L499 BasicCegarLoop]: trace histogram [58, 58, 58, 58, 58, 58, 58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:50:03,287 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2022-03-20 12:50:03,460 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2022-03-20 12:50:03,460 INFO L403 AbstractCegarLoop]: === Iteration 61 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:50:03,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:50:03,460 INFO L85 PathProgramCache]: Analyzing trace with hash 1001333143, now seen corresponding path program 113 times [2022-03-20 12:50:03,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:50:03,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1590860490] [2022-03-20 12:50:03,462 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:50:03,462 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:50:03,462 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:50:03,462 INFO L85 PathProgramCache]: Analyzing trace with hash 1001333143, now seen corresponding path program 114 times [2022-03-20 12:50:03,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:50:03,462 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206545810] [2022-03-20 12:50:03,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:50:03,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:50:03,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:50:04,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:50:04,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:50:04,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 413 [2022-03-20 12:50:04,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:50:04,785 INFO L134 CoverageAnalysis]: Checked inductivity of 11745 backedges. 0 proven. 3364 refuted. 0 times theorem prover too weak. 8381 trivial. 0 not checked. [2022-03-20 12:50:04,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:50:04,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206545810] [2022-03-20 12:50:04,785 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206545810] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:50:04,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894277358] [2022-03-20 12:50:04,785 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 12:50:04,785 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:50:04,785 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:50:04,786 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 12:50:04,787 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-03-20 12:50:05,230 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 12:50:05,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:50:05,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 12:50:05,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:50:05,715 INFO L134 CoverageAnalysis]: Checked inductivity of 11745 backedges. 229 proven. 1 refuted. 0 times theorem prover too weak. 11515 trivial. 0 not checked. [2022-03-20 12:50:05,715 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:50:06,039 INFO L134 CoverageAnalysis]: Checked inductivity of 11745 backedges. 229 proven. 1 refuted. 0 times theorem prover too weak. 11515 trivial. 0 not checked. [2022-03-20 12:50:06,039 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1894277358] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:50:06,039 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:50:06,040 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 7, 7] total 71 [2022-03-20 12:50:06,040 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:50:06,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1590860490] [2022-03-20 12:50:06,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1590860490] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:50:06,040 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:50:06,040 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [63] imperfect sequences [] total 63 [2022-03-20 12:50:06,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063481014] [2022-03-20 12:50:06,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:50:06,041 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-03-20 12:50:06,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:50:06,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-03-20 12:50:06,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1859, Invalid=3111, Unknown=0, NotChecked=0, Total=4970 [2022-03-20 12:50:06,042 INFO L87 Difference]: Start difference. First operand 1360 states and 1941 transitions. Second operand has 63 states, 63 states have (on average 2.1746031746031744) internal successors, (137), 61 states have internal predecessors, (137), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 12:50:10,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:50:10,342 INFO L93 Difference]: Finished difference Result 2652 states and 3898 transitions. [2022-03-20 12:50:10,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-03-20 12:50:10,342 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 2.1746031746031744) internal successors, (137), 61 states have internal predecessors, (137), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 428 [2022-03-20 12:50:10,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:50:10,349 INFO L225 Difference]: With dead ends: 2652 [2022-03-20 12:50:10,349 INFO L226 Difference]: Without dead ends: 1415 [2022-03-20 12:50:10,352 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 982 GetRequests, 851 SyntacticMatches, 1 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2535 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=5644, Invalid=11648, Unknown=0, NotChecked=0, Total=17292 [2022-03-20 12:50:10,352 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 3289 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 3590 mSolverCounterSat, 1467 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3293 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 5057 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1467 IncrementalHoareTripleChecker+Valid, 3590 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-03-20 12:50:10,352 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [3293 Valid, 59 Invalid, 5057 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1467 Valid, 3590 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-03-20 12:50:10,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1415 states. [2022-03-20 12:50:10,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1415 to 1383. [2022-03-20 12:50:10,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1383 states, 1198 states have (on average 1.348914858096828) internal successors, (1616), 1198 states have internal predecessors, (1616), 180 states have call successors, (180), 6 states have call predecessors, (180), 4 states have return successors, (178), 178 states have call predecessors, (178), 178 states have call successors, (178) [2022-03-20 12:50:10,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1383 states to 1383 states and 1974 transitions. [2022-03-20 12:50:10,923 INFO L78 Accepts]: Start accepts. Automaton has 1383 states and 1974 transitions. Word has length 428 [2022-03-20 12:50:10,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:50:10,924 INFO L478 AbstractCegarLoop]: Abstraction has 1383 states and 1974 transitions. [2022-03-20 12:50:10,924 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 2.1746031746031744) internal successors, (137), 61 states have internal predecessors, (137), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 12:50:10,924 INFO L276 IsEmpty]: Start isEmpty. Operand 1383 states and 1974 transitions. [2022-03-20 12:50:10,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 436 [2022-03-20 12:50:10,927 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:50:10,927 INFO L499 BasicCegarLoop]: trace histogram [59, 59, 59, 59, 59, 59, 59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:50:10,946 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2022-03-20 12:50:11,145 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2022-03-20 12:50:11,146 INFO L403 AbstractCegarLoop]: === Iteration 62 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:50:11,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:50:11,146 INFO L85 PathProgramCache]: Analyzing trace with hash -791209259, now seen corresponding path program 115 times [2022-03-20 12:50:11,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:50:11,147 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1476630774] [2022-03-20 12:50:11,147 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:50:11,148 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:50:11,148 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:50:11,148 INFO L85 PathProgramCache]: Analyzing trace with hash -791209259, now seen corresponding path program 116 times [2022-03-20 12:50:11,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:50:11,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706900778] [2022-03-20 12:50:11,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:50:11,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:50:11,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:50:12,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:50:12,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:50:12,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 420 [2022-03-20 12:50:12,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:50:12,424 INFO L134 CoverageAnalysis]: Checked inductivity of 12154 backedges. 0 proven. 3481 refuted. 0 times theorem prover too weak. 8673 trivial. 0 not checked. [2022-03-20 12:50:12,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:50:12,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706900778] [2022-03-20 12:50:12,425 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706900778] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:50:12,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309844631] [2022-03-20 12:50:12,425 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 12:50:12,425 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:50:12,425 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:50:12,426 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 12:50:12,427 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-03-20 12:50:12,996 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 12:50:12,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:50:13,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 1644 conjuncts, 61 conjunts are in the unsatisfiable core [2022-03-20 12:50:13,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:50:13,528 INFO L134 CoverageAnalysis]: Checked inductivity of 12154 backedges. 0 proven. 3481 refuted. 0 times theorem prover too weak. 8673 trivial. 0 not checked. [2022-03-20 12:50:13,528 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:50:16,372 INFO L134 CoverageAnalysis]: Checked inductivity of 12154 backedges. 0 proven. 3481 refuted. 0 times theorem prover too weak. 8673 trivial. 0 not checked. [2022-03-20 12:50:16,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [309844631] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:50:16,372 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:50:16,372 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 62, 62] total 125 [2022-03-20 12:50:16,372 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:50:16,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1476630774] [2022-03-20 12:50:16,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1476630774] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:50:16,372 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:50:16,373 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [64] imperfect sequences [] total 64 [2022-03-20 12:50:16,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921071407] [2022-03-20 12:50:16,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:50:16,373 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-03-20 12:50:16,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:50:16,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-03-20 12:50:16,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7507, Invalid=7993, Unknown=0, NotChecked=0, Total=15500 [2022-03-20 12:50:16,375 INFO L87 Difference]: Start difference. First operand 1383 states and 1974 transitions. Second operand has 64 states, 64 states have (on average 2.171875) internal successors, (139), 62 states have internal predecessors, (139), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 12:50:21,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:50:21,557 INFO L93 Difference]: Finished difference Result 2696 states and 3963 transitions. [2022-03-20 12:50:21,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-03-20 12:50:21,559 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 2.171875) internal successors, (139), 62 states have internal predecessors, (139), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 435 [2022-03-20 12:50:21,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:50:21,561 INFO L225 Difference]: With dead ends: 2696 [2022-03-20 12:50:21,561 INFO L226 Difference]: Without dead ends: 1438 [2022-03-20 12:50:21,564 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 998 GetRequests, 813 SyntacticMatches, 0 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2362 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=15078, Invalid=19704, Unknown=0, NotChecked=0, Total=34782 [2022-03-20 12:50:21,564 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 3499 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 3441 mSolverCounterSat, 1641 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3503 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 5082 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1641 IncrementalHoareTripleChecker+Valid, 3441 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-03-20 12:50:21,564 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [3503 Valid, 53 Invalid, 5082 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1641 Valid, 3441 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-03-20 12:50:21,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1438 states. [2022-03-20 12:50:22,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1438 to 1406. [2022-03-20 12:50:22,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1406 states, 1218 states have (on average 1.3489326765188834) internal successors, (1643), 1218 states have internal predecessors, (1643), 183 states have call successors, (183), 6 states have call predecessors, (183), 4 states have return successors, (181), 181 states have call predecessors, (181), 181 states have call successors, (181) [2022-03-20 12:50:22,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1406 states to 1406 states and 2007 transitions. [2022-03-20 12:50:22,220 INFO L78 Accepts]: Start accepts. Automaton has 1406 states and 2007 transitions. Word has length 435 [2022-03-20 12:50:22,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:50:22,220 INFO L478 AbstractCegarLoop]: Abstraction has 1406 states and 2007 transitions. [2022-03-20 12:50:22,220 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 2.171875) internal successors, (139), 62 states have internal predecessors, (139), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 12:50:22,220 INFO L276 IsEmpty]: Start isEmpty. Operand 1406 states and 2007 transitions. [2022-03-20 12:50:22,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 443 [2022-03-20 12:50:22,223 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:50:22,223 INFO L499 BasicCegarLoop]: trace histogram [60, 60, 60, 60, 60, 60, 60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:50:22,243 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2022-03-20 12:50:22,427 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2022-03-20 12:50:22,428 INFO L403 AbstractCegarLoop]: === Iteration 63 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:50:22,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:50:22,428 INFO L85 PathProgramCache]: Analyzing trace with hash -834060197, now seen corresponding path program 117 times [2022-03-20 12:50:22,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:50:22,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [496923024] [2022-03-20 12:50:22,429 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:50:22,429 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:50:22,429 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:50:22,429 INFO L85 PathProgramCache]: Analyzing trace with hash -834060197, now seen corresponding path program 118 times [2022-03-20 12:50:22,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:50:22,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5646464] [2022-03-20 12:50:22,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:50:22,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:50:22,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:50:23,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:50:23,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:50:23,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 427 [2022-03-20 12:50:23,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:50:23,327 INFO L134 CoverageAnalysis]: Checked inductivity of 12570 backedges. 0 proven. 3600 refuted. 0 times theorem prover too weak. 8970 trivial. 0 not checked. [2022-03-20 12:50:23,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:50:23,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5646464] [2022-03-20 12:50:23,327 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5646464] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:50:23,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325372274] [2022-03-20 12:50:23,327 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 12:50:23,327 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:50:23,329 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:50:23,330 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 12:50:23,331 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-03-20 12:50:23,914 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 12:50:23,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:50:23,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 1670 conjuncts, 62 conjunts are in the unsatisfiable core [2022-03-20 12:50:23,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:50:24,501 INFO L134 CoverageAnalysis]: Checked inductivity of 12570 backedges. 0 proven. 3600 refuted. 0 times theorem prover too weak. 8970 trivial. 0 not checked. [2022-03-20 12:50:24,501 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:50:27,045 INFO L134 CoverageAnalysis]: Checked inductivity of 12570 backedges. 0 proven. 3600 refuted. 0 times theorem prover too weak. 8970 trivial. 0 not checked. [2022-03-20 12:50:27,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [325372274] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:50:27,046 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:50:27,046 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 63, 63] total 127 [2022-03-20 12:50:27,046 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:50:27,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [496923024] [2022-03-20 12:50:27,046 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [496923024] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:50:27,046 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:50:27,046 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [65] imperfect sequences [] total 65 [2022-03-20 12:50:27,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853200972] [2022-03-20 12:50:27,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:50:27,047 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-03-20 12:50:27,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:50:27,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-03-20 12:50:27,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7754, Invalid=8248, Unknown=0, NotChecked=0, Total=16002 [2022-03-20 12:50:27,049 INFO L87 Difference]: Start difference. First operand 1406 states and 2007 transitions. Second operand has 65 states, 65 states have (on average 2.169230769230769) internal successors, (141), 63 states have internal predecessors, (141), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 12:50:32,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:50:32,503 INFO L93 Difference]: Finished difference Result 2740 states and 4028 transitions. [2022-03-20 12:50:32,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-03-20 12:50:32,503 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 2.169230769230769) internal successors, (141), 63 states have internal predecessors, (141), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 442 [2022-03-20 12:50:32,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:50:32,505 INFO L225 Difference]: With dead ends: 2740 [2022-03-20 12:50:32,505 INFO L226 Difference]: Without dead ends: 1461 [2022-03-20 12:50:32,508 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1014 GetRequests, 826 SyntacticMatches, 0 SemanticMatches, 188 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2432 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=15573, Invalid=20337, Unknown=0, NotChecked=0, Total=35910 [2022-03-20 12:50:32,508 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 3611 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 3686 mSolverCounterSat, 1739 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3615 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 5425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1739 IncrementalHoareTripleChecker+Valid, 3686 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-03-20 12:50:32,509 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [3615 Valid, 53 Invalid, 5425 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1739 Valid, 3686 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-03-20 12:50:32,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1461 states. [2022-03-20 12:50:33,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1461 to 1429. [2022-03-20 12:50:33,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1429 states, 1238 states have (on average 1.3489499192245558) internal successors, (1670), 1238 states have internal predecessors, (1670), 186 states have call successors, (186), 6 states have call predecessors, (186), 4 states have return successors, (184), 184 states have call predecessors, (184), 184 states have call successors, (184) [2022-03-20 12:50:33,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1429 states to 1429 states and 2040 transitions. [2022-03-20 12:50:33,136 INFO L78 Accepts]: Start accepts. Automaton has 1429 states and 2040 transitions. Word has length 442 [2022-03-20 12:50:33,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:50:33,136 INFO L478 AbstractCegarLoop]: Abstraction has 1429 states and 2040 transitions. [2022-03-20 12:50:33,136 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 2.169230769230769) internal successors, (141), 63 states have internal predecessors, (141), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 12:50:33,136 INFO L276 IsEmpty]: Start isEmpty. Operand 1429 states and 2040 transitions. [2022-03-20 12:50:33,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 450 [2022-03-20 12:50:33,139 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:50:33,139 INFO L499 BasicCegarLoop]: trace histogram [61, 61, 61, 61, 61, 61, 61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:50:33,159 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2022-03-20 12:50:33,351 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:50:33,351 INFO L403 AbstractCegarLoop]: === Iteration 64 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:50:33,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:50:33,351 INFO L85 PathProgramCache]: Analyzing trace with hash 1912687121, now seen corresponding path program 119 times [2022-03-20 12:50:33,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:50:33,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1099119940] [2022-03-20 12:50:33,352 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:50:33,353 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:50:33,353 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:50:33,353 INFO L85 PathProgramCache]: Analyzing trace with hash 1912687121, now seen corresponding path program 120 times [2022-03-20 12:50:33,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:50:33,353 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259048347] [2022-03-20 12:50:33,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:50:33,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:50:33,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:50:34,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:50:34,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:50:34,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 434 [2022-03-20 12:50:34,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:50:34,644 INFO L134 CoverageAnalysis]: Checked inductivity of 12993 backedges. 0 proven. 3721 refuted. 0 times theorem prover too weak. 9272 trivial. 0 not checked. [2022-03-20 12:50:34,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:50:34,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259048347] [2022-03-20 12:50:34,644 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259048347] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:50:34,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039528530] [2022-03-20 12:50:34,644 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 12:50:34,645 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:50:34,645 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:50:34,646 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 12:50:34,646 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-03-20 12:50:35,101 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 12:50:35,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:50:35,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 12:50:35,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:50:35,752 INFO L134 CoverageAnalysis]: Checked inductivity of 12993 backedges. 241 proven. 1 refuted. 0 times theorem prover too weak. 12751 trivial. 0 not checked. [2022-03-20 12:50:35,753 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:50:36,274 INFO L134 CoverageAnalysis]: Checked inductivity of 12993 backedges. 241 proven. 1 refuted. 0 times theorem prover too weak. 12751 trivial. 0 not checked. [2022-03-20 12:50:36,274 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2039528530] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:50:36,274 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:50:36,274 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 7, 7] total 74 [2022-03-20 12:50:36,274 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:50:36,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1099119940] [2022-03-20 12:50:36,275 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1099119940] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:50:36,275 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:50:36,275 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [66] imperfect sequences [] total 66 [2022-03-20 12:50:36,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923728828] [2022-03-20 12:50:36,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:50:36,275 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-03-20 12:50:36,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:50:36,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-03-20 12:50:36,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2045, Invalid=3357, Unknown=0, NotChecked=0, Total=5402 [2022-03-20 12:50:36,276 INFO L87 Difference]: Start difference. First operand 1429 states and 2040 transitions. Second operand has 66 states, 66 states have (on average 2.1666666666666665) internal successors, (143), 64 states have internal predecessors, (143), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 12:50:40,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:50:40,940 INFO L93 Difference]: Finished difference Result 2784 states and 4093 transitions. [2022-03-20 12:50:40,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-03-20 12:50:40,941 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 2.1666666666666665) internal successors, (143), 64 states have internal predecessors, (143), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 449 [2022-03-20 12:50:40,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:50:40,943 INFO L225 Difference]: With dead ends: 2784 [2022-03-20 12:50:40,943 INFO L226 Difference]: Without dead ends: 1484 [2022-03-20 12:50:40,946 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1030 GetRequests, 893 SyntacticMatches, 1 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2757 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=6208, Invalid=12698, Unknown=0, NotChecked=0, Total=18906 [2022-03-20 12:50:40,946 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 3471 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 3818 mSolverCounterSat, 1455 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3475 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 5273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1455 IncrementalHoareTripleChecker+Valid, 3818 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-03-20 12:50:40,946 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [3475 Valid, 61 Invalid, 5273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1455 Valid, 3818 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-03-20 12:50:40,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1484 states. [2022-03-20 12:50:41,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1484 to 1452. [2022-03-20 12:50:41,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1452 states, 1258 states have (on average 1.348966613672496) internal successors, (1697), 1258 states have internal predecessors, (1697), 189 states have call successors, (189), 6 states have call predecessors, (189), 4 states have return successors, (187), 187 states have call predecessors, (187), 187 states have call successors, (187) [2022-03-20 12:50:41,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1452 states to 1452 states and 2073 transitions. [2022-03-20 12:50:41,547 INFO L78 Accepts]: Start accepts. Automaton has 1452 states and 2073 transitions. Word has length 449 [2022-03-20 12:50:41,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:50:41,548 INFO L478 AbstractCegarLoop]: Abstraction has 1452 states and 2073 transitions. [2022-03-20 12:50:41,548 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 2.1666666666666665) internal successors, (143), 64 states have internal predecessors, (143), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 12:50:41,548 INFO L276 IsEmpty]: Start isEmpty. Operand 1452 states and 2073 transitions. [2022-03-20 12:50:41,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 457 [2022-03-20 12:50:41,550 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:50:41,551 INFO L499 BasicCegarLoop]: trace histogram [62, 62, 62, 62, 62, 62, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:50:41,568 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2022-03-20 12:50:41,755 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:50:41,755 INFO L403 AbstractCegarLoop]: === Iteration 65 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:50:41,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:50:41,756 INFO L85 PathProgramCache]: Analyzing trace with hash -898460897, now seen corresponding path program 121 times [2022-03-20 12:50:41,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:50:41,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1434603498] [2022-03-20 12:50:41,757 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:50:41,757 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:50:41,757 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:50:41,757 INFO L85 PathProgramCache]: Analyzing trace with hash -898460897, now seen corresponding path program 122 times [2022-03-20 12:50:41,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:50:41,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502786271] [2022-03-20 12:50:41,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:50:41,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:50:41,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:50:43,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:50:43,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:50:43,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 441 [2022-03-20 12:50:43,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:50:43,153 INFO L134 CoverageAnalysis]: Checked inductivity of 13423 backedges. 0 proven. 3844 refuted. 0 times theorem prover too weak. 9579 trivial. 0 not checked. [2022-03-20 12:50:43,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:50:43,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502786271] [2022-03-20 12:50:43,154 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502786271] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:50:43,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897910419] [2022-03-20 12:50:43,154 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 12:50:43,154 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:50:43,154 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:50:43,159 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 12:50:43,160 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-03-20 12:50:43,772 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 12:50:43,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:50:43,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 1722 conjuncts, 64 conjunts are in the unsatisfiable core [2022-03-20 12:50:43,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:50:44,299 INFO L134 CoverageAnalysis]: Checked inductivity of 13423 backedges. 0 proven. 3844 refuted. 0 times theorem prover too weak. 9579 trivial. 0 not checked. [2022-03-20 12:50:44,300 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:50:47,780 INFO L134 CoverageAnalysis]: Checked inductivity of 13423 backedges. 0 proven. 3844 refuted. 0 times theorem prover too weak. 9579 trivial. 0 not checked. [2022-03-20 12:50:47,781 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1897910419] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:50:47,781 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:50:47,781 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 65, 65] total 131 [2022-03-20 12:50:47,781 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:50:47,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1434603498] [2022-03-20 12:50:47,781 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1434603498] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:50:47,781 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:50:47,781 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [67] imperfect sequences [] total 67 [2022-03-20 12:50:47,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158626268] [2022-03-20 12:50:47,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:50:47,782 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-03-20 12:50:47,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:50:47,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-03-20 12:50:47,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8260, Invalid=8770, Unknown=0, NotChecked=0, Total=17030 [2022-03-20 12:50:47,784 INFO L87 Difference]: Start difference. First operand 1452 states and 2073 transitions. Second operand has 67 states, 67 states have (on average 2.1641791044776117) internal successors, (145), 65 states have internal predecessors, (145), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 12:50:53,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:50:53,447 INFO L93 Difference]: Finished difference Result 2828 states and 4158 transitions. [2022-03-20 12:50:53,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-03-20 12:50:53,448 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 2.1641791044776117) internal successors, (145), 65 states have internal predecessors, (145), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 456 [2022-03-20 12:50:53,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:50:53,450 INFO L225 Difference]: With dead ends: 2828 [2022-03-20 12:50:53,450 INFO L226 Difference]: Without dead ends: 1507 [2022-03-20 12:50:53,454 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1046 GetRequests, 852 SyntacticMatches, 0 SemanticMatches, 194 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2575 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=16587, Invalid=21633, Unknown=0, NotChecked=0, Total=38220 [2022-03-20 12:50:53,454 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 3864 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 3477 mSolverCounterSat, 1783 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3868 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 5260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1783 IncrementalHoareTripleChecker+Valid, 3477 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-03-20 12:50:53,454 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [3868 Valid, 51 Invalid, 5260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1783 Valid, 3477 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-03-20 12:50:53,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1507 states. [2022-03-20 12:50:54,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1507 to 1475. [2022-03-20 12:50:54,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1475 states, 1278 states have (on average 1.3489827856025038) internal successors, (1724), 1278 states have internal predecessors, (1724), 192 states have call successors, (192), 6 states have call predecessors, (192), 4 states have return successors, (190), 190 states have call predecessors, (190), 190 states have call successors, (190) [2022-03-20 12:50:54,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1475 states to 1475 states and 2106 transitions. [2022-03-20 12:50:54,106 INFO L78 Accepts]: Start accepts. Automaton has 1475 states and 2106 transitions. Word has length 456 [2022-03-20 12:50:54,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:50:54,106 INFO L478 AbstractCegarLoop]: Abstraction has 1475 states and 2106 transitions. [2022-03-20 12:50:54,107 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 2.1641791044776117) internal successors, (145), 65 states have internal predecessors, (145), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 12:50:54,107 INFO L276 IsEmpty]: Start isEmpty. Operand 1475 states and 2106 transitions. [2022-03-20 12:50:54,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 464 [2022-03-20 12:50:54,109 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:50:54,109 INFO L499 BasicCegarLoop]: trace histogram [63, 63, 63, 63, 63, 63, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:50:54,131 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2022-03-20 12:50:54,314 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2022-03-20 12:50:54,314 INFO L403 AbstractCegarLoop]: === Iteration 66 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:50:54,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:50:54,315 INFO L85 PathProgramCache]: Analyzing trace with hash 415016269, now seen corresponding path program 123 times [2022-03-20 12:50:54,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:50:54,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1689545434] [2022-03-20 12:50:54,316 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:50:54,317 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:50:54,317 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:50:54,317 INFO L85 PathProgramCache]: Analyzing trace with hash 415016269, now seen corresponding path program 124 times [2022-03-20 12:50:54,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:50:54,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586194871] [2022-03-20 12:50:54,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:50:54,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:50:54,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:50:55,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:50:55,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:50:55,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 448 [2022-03-20 12:50:55,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:50:55,775 INFO L134 CoverageAnalysis]: Checked inductivity of 13860 backedges. 0 proven. 3969 refuted. 0 times theorem prover too weak. 9891 trivial. 0 not checked. [2022-03-20 12:50:55,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:50:55,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586194871] [2022-03-20 12:50:55,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586194871] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:50:55,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067979089] [2022-03-20 12:50:55,776 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 12:50:55,776 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:50:55,776 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:50:55,777 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 12:50:55,778 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-03-20 12:50:56,360 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 12:50:56,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:50:56,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 1748 conjuncts, 65 conjunts are in the unsatisfiable core [2022-03-20 12:50:56,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:50:56,904 INFO L134 CoverageAnalysis]: Checked inductivity of 13860 backedges. 0 proven. 3969 refuted. 0 times theorem prover too weak. 9891 trivial. 0 not checked. [2022-03-20 12:50:56,904 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:51:00,856 INFO L134 CoverageAnalysis]: Checked inductivity of 13860 backedges. 0 proven. 3969 refuted. 0 times theorem prover too weak. 9891 trivial. 0 not checked. [2022-03-20 12:51:00,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2067979089] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:51:00,857 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:51:00,857 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 66, 66] total 133 [2022-03-20 12:51:00,857 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:51:00,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1689545434] [2022-03-20 12:51:00,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1689545434] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:51:00,857 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:51:00,857 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [68] imperfect sequences [] total 68 [2022-03-20 12:51:00,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031656238] [2022-03-20 12:51:00,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:51:00,858 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-03-20 12:51:00,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:51:00,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-03-20 12:51:00,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8519, Invalid=9037, Unknown=0, NotChecked=0, Total=17556 [2022-03-20 12:51:00,860 INFO L87 Difference]: Start difference. First operand 1475 states and 2106 transitions. Second operand has 68 states, 68 states have (on average 2.161764705882353) internal successors, (147), 66 states have internal predecessors, (147), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 12:51:07,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:51:07,178 INFO L93 Difference]: Finished difference Result 2872 states and 4223 transitions. [2022-03-20 12:51:07,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-03-20 12:51:07,179 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 2.161764705882353) internal successors, (147), 66 states have internal predecessors, (147), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 463 [2022-03-20 12:51:07,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:51:07,181 INFO L225 Difference]: With dead ends: 2872 [2022-03-20 12:51:07,181 INFO L226 Difference]: Without dead ends: 1530 [2022-03-20 12:51:07,184 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1062 GetRequests, 865 SyntacticMatches, 0 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2648 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=17106, Invalid=22296, Unknown=0, NotChecked=0, Total=39402 [2022-03-20 12:51:07,184 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 3709 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 3690 mSolverCounterSat, 1724 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3713 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 5414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1724 IncrementalHoareTripleChecker+Valid, 3690 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-03-20 12:51:07,184 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [3713 Valid, 59 Invalid, 5414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1724 Valid, 3690 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-03-20 12:51:07,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1530 states. [2022-03-20 12:51:07,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1530 to 1498. [2022-03-20 12:51:07,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1498 states, 1298 states have (on average 1.3489984591679507) internal successors, (1751), 1298 states have internal predecessors, (1751), 195 states have call successors, (195), 6 states have call predecessors, (195), 4 states have return successors, (193), 193 states have call predecessors, (193), 193 states have call successors, (193) [2022-03-20 12:51:07,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1498 states to 1498 states and 2139 transitions. [2022-03-20 12:51:07,886 INFO L78 Accepts]: Start accepts. Automaton has 1498 states and 2139 transitions. Word has length 463 [2022-03-20 12:51:07,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:51:07,887 INFO L478 AbstractCegarLoop]: Abstraction has 1498 states and 2139 transitions. [2022-03-20 12:51:07,887 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 2.161764705882353) internal successors, (147), 66 states have internal predecessors, (147), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 12:51:07,887 INFO L276 IsEmpty]: Start isEmpty. Operand 1498 states and 2139 transitions. [2022-03-20 12:51:07,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 471 [2022-03-20 12:51:07,891 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:51:07,891 INFO L499 BasicCegarLoop]: trace histogram [64, 64, 64, 64, 64, 64, 64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:51:07,913 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2022-03-20 12:51:08,105 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2022-03-20 12:51:08,105 INFO L403 AbstractCegarLoop]: === Iteration 67 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:51:08,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:51:08,105 INFO L85 PathProgramCache]: Analyzing trace with hash -108373533, now seen corresponding path program 125 times [2022-03-20 12:51:08,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:51:08,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1349712143] [2022-03-20 12:51:08,107 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:51:08,107 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:51:08,107 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:51:08,107 INFO L85 PathProgramCache]: Analyzing trace with hash -108373533, now seen corresponding path program 126 times [2022-03-20 12:51:08,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:51:08,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404369801] [2022-03-20 12:51:08,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:51:08,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:51:08,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:51:09,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:51:09,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:51:09,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 455 [2022-03-20 12:51:09,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:51:09,508 INFO L134 CoverageAnalysis]: Checked inductivity of 14304 backedges. 0 proven. 4096 refuted. 0 times theorem prover too weak. 10208 trivial. 0 not checked. [2022-03-20 12:51:09,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:51:09,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404369801] [2022-03-20 12:51:09,508 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404369801] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:51:09,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [692567377] [2022-03-20 12:51:09,508 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 12:51:09,508 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:51:09,509 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:51:09,510 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 12:51:09,512 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-03-20 12:51:09,979 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 12:51:09,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:51:09,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 12:51:09,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:51:10,523 INFO L134 CoverageAnalysis]: Checked inductivity of 14304 backedges. 253 proven. 1 refuted. 0 times theorem prover too weak. 14050 trivial. 0 not checked. [2022-03-20 12:51:10,523 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:51:10,922 INFO L134 CoverageAnalysis]: Checked inductivity of 14304 backedges. 253 proven. 1 refuted. 0 times theorem prover too weak. 14050 trivial. 0 not checked. [2022-03-20 12:51:10,922 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [692567377] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:51:10,922 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:51:10,922 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 7, 7] total 77 [2022-03-20 12:51:10,922 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:51:10,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1349712143] [2022-03-20 12:51:10,923 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1349712143] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:51:10,923 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:51:10,923 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [69] imperfect sequences [] total 69 [2022-03-20 12:51:10,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896648071] [2022-03-20 12:51:10,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:51:10,923 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-03-20 12:51:10,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:51:10,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-03-20 12:51:10,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2240, Invalid=3612, Unknown=0, NotChecked=0, Total=5852 [2022-03-20 12:51:10,924 INFO L87 Difference]: Start difference. First operand 1498 states and 2139 transitions. Second operand has 69 states, 69 states have (on average 2.1594202898550723) internal successors, (149), 67 states have internal predecessors, (149), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 12:51:16,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:51:16,027 INFO L93 Difference]: Finished difference Result 2916 states and 4288 transitions. [2022-03-20 12:51:16,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-03-20 12:51:16,028 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 2.1594202898550723) internal successors, (149), 67 states have internal predecessors, (149), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 470 [2022-03-20 12:51:16,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:51:16,030 INFO L225 Difference]: With dead ends: 2916 [2022-03-20 12:51:16,030 INFO L226 Difference]: Without dead ends: 1553 [2022-03-20 12:51:16,033 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1078 GetRequests, 935 SyntacticMatches, 1 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2988 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=6799, Invalid=13793, Unknown=0, NotChecked=0, Total=20592 [2022-03-20 12:51:16,035 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 4028 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 3692 mSolverCounterSat, 1842 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4032 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 5534 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1842 IncrementalHoareTripleChecker+Valid, 3692 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-03-20 12:51:16,035 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [4032 Valid, 51 Invalid, 5534 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1842 Valid, 3692 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-03-20 12:51:16,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1553 states. [2022-03-20 12:51:16,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1553 to 1521. [2022-03-20 12:51:16,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1521 states, 1318 states have (on average 1.3490136570561457) internal successors, (1778), 1318 states have internal predecessors, (1778), 198 states have call successors, (198), 6 states have call predecessors, (198), 4 states have return successors, (196), 196 states have call predecessors, (196), 196 states have call successors, (196) [2022-03-20 12:51:16,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1521 states to 1521 states and 2172 transitions. [2022-03-20 12:51:16,710 INFO L78 Accepts]: Start accepts. Automaton has 1521 states and 2172 transitions. Word has length 470 [2022-03-20 12:51:16,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:51:16,711 INFO L478 AbstractCegarLoop]: Abstraction has 1521 states and 2172 transitions. [2022-03-20 12:51:16,711 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 2.1594202898550723) internal successors, (149), 67 states have internal predecessors, (149), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 12:51:16,711 INFO L276 IsEmpty]: Start isEmpty. Operand 1521 states and 2172 transitions. [2022-03-20 12:51:16,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 478 [2022-03-20 12:51:16,714 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:51:16,714 INFO L499 BasicCegarLoop]: trace histogram [65, 65, 65, 65, 65, 65, 65, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:51:16,734 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2022-03-20 12:51:16,927 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:51:16,927 INFO L403 AbstractCegarLoop]: === Iteration 68 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:51:16,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:51:16,928 INFO L85 PathProgramCache]: Analyzing trace with hash -1209406327, now seen corresponding path program 127 times [2022-03-20 12:51:16,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:51:16,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [700600450] [2022-03-20 12:51:16,929 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:51:16,929 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:51:16,929 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:51:16,929 INFO L85 PathProgramCache]: Analyzing trace with hash -1209406327, now seen corresponding path program 128 times [2022-03-20 12:51:16,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:51:16,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222035833] [2022-03-20 12:51:16,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:51:16,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:51:16,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:51:18,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:51:18,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:51:18,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 462 [2022-03-20 12:51:18,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:51:18,174 INFO L134 CoverageAnalysis]: Checked inductivity of 14755 backedges. 0 proven. 4225 refuted. 0 times theorem prover too weak. 10530 trivial. 0 not checked. [2022-03-20 12:51:18,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:51:18,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222035833] [2022-03-20 12:51:18,174 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222035833] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:51:18,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8573363] [2022-03-20 12:51:18,174 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 12:51:18,174 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:51:18,175 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:51:18,176 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 12:51:18,176 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-03-20 12:51:18,818 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 12:51:18,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:51:18,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 1800 conjuncts, 67 conjunts are in the unsatisfiable core [2022-03-20 12:51:18,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:51:19,296 INFO L134 CoverageAnalysis]: Checked inductivity of 14755 backedges. 0 proven. 4225 refuted. 0 times theorem prover too weak. 10530 trivial. 0 not checked. [2022-03-20 12:51:19,297 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:51:22,674 INFO L134 CoverageAnalysis]: Checked inductivity of 14755 backedges. 0 proven. 4225 refuted. 0 times theorem prover too weak. 10530 trivial. 0 not checked. [2022-03-20 12:51:22,674 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [8573363] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:51:22,674 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:51:22,675 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 68, 68] total 137 [2022-03-20 12:51:22,675 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:51:22,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [700600450] [2022-03-20 12:51:22,675 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [700600450] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:51:22,675 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:51:22,675 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [70] imperfect sequences [] total 70 [2022-03-20 12:51:22,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331391651] [2022-03-20 12:51:22,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:51:22,675 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-03-20 12:51:22,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:51:22,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-03-20 12:51:22,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9049, Invalid=9583, Unknown=0, NotChecked=0, Total=18632 [2022-03-20 12:51:22,677 INFO L87 Difference]: Start difference. First operand 1521 states and 2172 transitions. Second operand has 70 states, 70 states have (on average 2.157142857142857) internal successors, (151), 68 states have internal predecessors, (151), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 12:51:29,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:51:29,846 INFO L93 Difference]: Finished difference Result 2960 states and 4353 transitions. [2022-03-20 12:51:29,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-03-20 12:51:29,846 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 2.157142857142857) internal successors, (151), 68 states have internal predecessors, (151), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 477 [2022-03-20 12:51:29,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:51:29,849 INFO L225 Difference]: With dead ends: 2960 [2022-03-20 12:51:29,849 INFO L226 Difference]: Without dead ends: 1576 [2022-03-20 12:51:29,852 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1094 GetRequests, 891 SyntacticMatches, 0 SemanticMatches, 203 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2797 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=18168, Invalid=23652, Unknown=0, NotChecked=0, Total=41820 [2022-03-20 12:51:29,852 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 4666 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 3525 mSolverCounterSat, 2277 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4670 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 5802 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2277 IncrementalHoareTripleChecker+Valid, 3525 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-03-20 12:51:29,852 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [4670 Valid, 47 Invalid, 5802 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2277 Valid, 3525 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-03-20 12:51:29,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1576 states. [2022-03-20 12:51:30,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1576 to 1544. [2022-03-20 12:51:30,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1544 states, 1338 states have (on average 1.3490284005979074) internal successors, (1805), 1338 states have internal predecessors, (1805), 201 states have call successors, (201), 6 states have call predecessors, (201), 4 states have return successors, (199), 199 states have call predecessors, (199), 199 states have call successors, (199) [2022-03-20 12:51:30,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1544 states to 1544 states and 2205 transitions. [2022-03-20 12:51:30,604 INFO L78 Accepts]: Start accepts. Automaton has 1544 states and 2205 transitions. Word has length 477 [2022-03-20 12:51:30,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:51:30,605 INFO L478 AbstractCegarLoop]: Abstraction has 1544 states and 2205 transitions. [2022-03-20 12:51:30,605 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 2.157142857142857) internal successors, (151), 68 states have internal predecessors, (151), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 12:51:30,605 INFO L276 IsEmpty]: Start isEmpty. Operand 1544 states and 2205 transitions. [2022-03-20 12:51:30,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 485 [2022-03-20 12:51:30,608 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:51:30,608 INFO L499 BasicCegarLoop]: trace histogram [66, 66, 66, 66, 66, 66, 66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:51:30,631 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2022-03-20 12:51:30,828 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2022-03-20 12:51:30,829 INFO L403 AbstractCegarLoop]: === Iteration 69 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:51:30,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:51:30,829 INFO L85 PathProgramCache]: Analyzing trace with hash 1433392295, now seen corresponding path program 129 times [2022-03-20 12:51:30,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:51:30,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [920232935] [2022-03-20 12:51:30,830 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:51:30,830 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:51:30,830 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:51:30,830 INFO L85 PathProgramCache]: Analyzing trace with hash 1433392295, now seen corresponding path program 130 times [2022-03-20 12:51:30,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:51:30,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107319983] [2022-03-20 12:51:30,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:51:30,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:51:30,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:51:32,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:51:32,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:51:32,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 469 [2022-03-20 12:51:32,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:51:32,534 INFO L134 CoverageAnalysis]: Checked inductivity of 15213 backedges. 0 proven. 4356 refuted. 0 times theorem prover too weak. 10857 trivial. 0 not checked. [2022-03-20 12:51:32,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:51:32,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107319983] [2022-03-20 12:51:32,535 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107319983] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:51:32,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067098152] [2022-03-20 12:51:32,535 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 12:51:32,535 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:51:32,535 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:51:32,536 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 12:51:32,537 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-03-20 12:51:33,150 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 12:51:33,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:51:33,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 1826 conjuncts, 68 conjunts are in the unsatisfiable core [2022-03-20 12:51:33,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:51:33,785 INFO L134 CoverageAnalysis]: Checked inductivity of 15213 backedges. 0 proven. 4356 refuted. 0 times theorem prover too weak. 10857 trivial. 0 not checked. [2022-03-20 12:51:33,785 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:51:36,620 INFO L134 CoverageAnalysis]: Checked inductivity of 15213 backedges. 0 proven. 4356 refuted. 0 times theorem prover too weak. 10857 trivial. 0 not checked. [2022-03-20 12:51:36,621 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1067098152] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:51:36,621 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:51:36,621 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 69, 69] total 139 [2022-03-20 12:51:36,621 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:51:36,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [920232935] [2022-03-20 12:51:36,621 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [920232935] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:51:36,621 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:51:36,621 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [71] imperfect sequences [] total 71 [2022-03-20 12:51:36,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936936789] [2022-03-20 12:51:36,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:51:36,622 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-03-20 12:51:36,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:51:36,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-03-20 12:51:36,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9320, Invalid=9862, Unknown=0, NotChecked=0, Total=19182 [2022-03-20 12:51:36,625 INFO L87 Difference]: Start difference. First operand 1544 states and 2205 transitions. Second operand has 71 states, 71 states have (on average 2.1549295774647885) internal successors, (153), 69 states have internal predecessors, (153), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 12:51:43,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:51:43,380 INFO L93 Difference]: Finished difference Result 3004 states and 4418 transitions. [2022-03-20 12:51:43,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-03-20 12:51:43,380 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 2.1549295774647885) internal successors, (153), 69 states have internal predecessors, (153), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 484 [2022-03-20 12:51:43,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:51:43,383 INFO L225 Difference]: With dead ends: 3004 [2022-03-20 12:51:43,383 INFO L226 Difference]: Without dead ends: 1599 [2022-03-20 12:51:43,385 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1110 GetRequests, 904 SyntacticMatches, 0 SemanticMatches, 206 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2873 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=18711, Invalid=24345, Unknown=0, NotChecked=0, Total=43056 [2022-03-20 12:51:43,386 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 3971 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 3822 mSolverCounterSat, 1852 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3975 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 5674 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1852 IncrementalHoareTripleChecker+Valid, 3822 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-03-20 12:51:43,386 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [3975 Valid, 51 Invalid, 5674 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1852 Valid, 3822 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-03-20 12:51:43,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1599 states. [2022-03-20 12:51:44,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1599 to 1567. [2022-03-20 12:51:44,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1567 states, 1358 states have (on average 1.3490427098674522) internal successors, (1832), 1358 states have internal predecessors, (1832), 204 states have call successors, (204), 6 states have call predecessors, (204), 4 states have return successors, (202), 202 states have call predecessors, (202), 202 states have call successors, (202) [2022-03-20 12:51:44,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1567 states to 1567 states and 2238 transitions. [2022-03-20 12:51:44,217 INFO L78 Accepts]: Start accepts. Automaton has 1567 states and 2238 transitions. Word has length 484 [2022-03-20 12:51:44,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:51:44,217 INFO L478 AbstractCegarLoop]: Abstraction has 1567 states and 2238 transitions. [2022-03-20 12:51:44,218 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 2.1549295774647885) internal successors, (153), 69 states have internal predecessors, (153), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 12:51:44,218 INFO L276 IsEmpty]: Start isEmpty. Operand 1567 states and 2238 transitions. [2022-03-20 12:51:44,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 492 [2022-03-20 12:51:44,221 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:51:44,221 INFO L499 BasicCegarLoop]: trace histogram [67, 67, 67, 67, 67, 67, 67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:51:44,244 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2022-03-20 12:51:44,435 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2022-03-20 12:51:44,435 INFO L403 AbstractCegarLoop]: === Iteration 70 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:51:44,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:51:44,436 INFO L85 PathProgramCache]: Analyzing trace with hash 1072291781, now seen corresponding path program 131 times [2022-03-20 12:51:44,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:51:44,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1784281691] [2022-03-20 12:51:44,437 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:51:44,437 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:51:44,437 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:51:44,437 INFO L85 PathProgramCache]: Analyzing trace with hash 1072291781, now seen corresponding path program 132 times [2022-03-20 12:51:44,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:51:44,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304927484] [2022-03-20 12:51:44,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:51:44,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:51:44,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:51:45,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:51:45,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:51:45,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 476 [2022-03-20 12:51:45,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:51:45,642 INFO L134 CoverageAnalysis]: Checked inductivity of 15678 backedges. 0 proven. 4489 refuted. 0 times theorem prover too weak. 11189 trivial. 0 not checked. [2022-03-20 12:51:45,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:51:45,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304927484] [2022-03-20 12:51:45,643 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304927484] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:51:45,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675441854] [2022-03-20 12:51:45,643 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 12:51:45,643 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:51:45,643 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:51:45,644 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 12:51:45,645 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-03-20 12:51:46,133 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 12:51:46,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:51:46,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 12:51:46,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:51:46,671 INFO L134 CoverageAnalysis]: Checked inductivity of 15678 backedges. 265 proven. 1 refuted. 0 times theorem prover too weak. 15412 trivial. 0 not checked. [2022-03-20 12:51:46,672 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:51:47,117 INFO L134 CoverageAnalysis]: Checked inductivity of 15678 backedges. 265 proven. 1 refuted. 0 times theorem prover too weak. 15412 trivial. 0 not checked. [2022-03-20 12:51:47,117 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1675441854] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:51:47,117 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:51:47,117 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 7, 7] total 80 [2022-03-20 12:51:47,117 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:51:47,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1784281691] [2022-03-20 12:51:47,118 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1784281691] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:51:47,118 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:51:47,118 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [72] imperfect sequences [] total 72 [2022-03-20 12:51:47,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249254501] [2022-03-20 12:51:47,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:51:47,118 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-03-20 12:51:47,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:51:47,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-03-20 12:51:47,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2444, Invalid=3876, Unknown=0, NotChecked=0, Total=6320 [2022-03-20 12:51:47,120 INFO L87 Difference]: Start difference. First operand 1567 states and 2238 transitions. Second operand has 72 states, 72 states have (on average 2.1527777777777777) internal successors, (155), 70 states have internal predecessors, (155), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 12:51:52,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:51:52,408 INFO L93 Difference]: Finished difference Result 3048 states and 4483 transitions. [2022-03-20 12:51:52,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-03-20 12:51:52,409 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 2.1527777777777777) internal successors, (155), 70 states have internal predecessors, (155), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 491 [2022-03-20 12:51:52,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:51:52,412 INFO L225 Difference]: With dead ends: 3048 [2022-03-20 12:51:52,412 INFO L226 Difference]: Without dead ends: 1622 [2022-03-20 12:51:52,415 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1126 GetRequests, 977 SyntacticMatches, 1 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3228 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=7417, Invalid=14933, Unknown=0, NotChecked=0, Total=22350 [2022-03-20 12:51:52,415 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 3651 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 4275 mSolverCounterSat, 1718 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3655 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 5993 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1718 IncrementalHoareTripleChecker+Valid, 4275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-03-20 12:51:52,415 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [3655 Valid, 53 Invalid, 5993 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1718 Valid, 4275 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-03-20 12:51:52,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1622 states. [2022-03-20 12:51:53,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1622 to 1590. [2022-03-20 12:51:53,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1590 states, 1378 states have (on average 1.349056603773585) internal successors, (1859), 1378 states have internal predecessors, (1859), 207 states have call successors, (207), 6 states have call predecessors, (207), 4 states have return successors, (205), 205 states have call predecessors, (205), 205 states have call successors, (205) [2022-03-20 12:51:53,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1590 states to 1590 states and 2271 transitions. [2022-03-20 12:51:53,182 INFO L78 Accepts]: Start accepts. Automaton has 1590 states and 2271 transitions. Word has length 491 [2022-03-20 12:51:53,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:51:53,182 INFO L478 AbstractCegarLoop]: Abstraction has 1590 states and 2271 transitions. [2022-03-20 12:51:53,182 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 2.1527777777777777) internal successors, (155), 70 states have internal predecessors, (155), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 12:51:53,182 INFO L276 IsEmpty]: Start isEmpty. Operand 1590 states and 2271 transitions. [2022-03-20 12:51:53,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 499 [2022-03-20 12:51:53,186 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:51:53,186 INFO L499 BasicCegarLoop]: trace histogram [68, 68, 68, 68, 68, 68, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:51:53,207 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2022-03-20 12:51:53,392 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2022-03-20 12:51:53,392 INFO L403 AbstractCegarLoop]: === Iteration 71 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:51:53,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:51:53,392 INFO L85 PathProgramCache]: Analyzing trace with hash -1400749205, now seen corresponding path program 133 times [2022-03-20 12:51:53,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:51:53,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1302221369] [2022-03-20 12:51:53,393 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:51:53,393 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:51:53,393 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:51:53,393 INFO L85 PathProgramCache]: Analyzing trace with hash -1400749205, now seen corresponding path program 134 times [2022-03-20 12:51:53,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:51:53,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740970291] [2022-03-20 12:51:53,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:51:53,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:51:53,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:51:55,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:51:55,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:51:55,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 483 [2022-03-20 12:51:55,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:51:55,034 INFO L134 CoverageAnalysis]: Checked inductivity of 16150 backedges. 0 proven. 4624 refuted. 0 times theorem prover too weak. 11526 trivial. 0 not checked. [2022-03-20 12:51:55,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:51:55,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740970291] [2022-03-20 12:51:55,034 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740970291] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:51:55,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1810326677] [2022-03-20 12:51:55,034 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 12:51:55,034 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:51:55,034 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:51:55,035 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 12:51:55,036 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-03-20 12:51:55,712 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 12:51:55,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:51:55,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 1878 conjuncts, 70 conjunts are in the unsatisfiable core [2022-03-20 12:51:55,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:51:56,186 INFO L134 CoverageAnalysis]: Checked inductivity of 16150 backedges. 0 proven. 4624 refuted. 0 times theorem prover too weak. 11526 trivial. 0 not checked. [2022-03-20 12:51:56,187 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:51:59,111 INFO L134 CoverageAnalysis]: Checked inductivity of 16150 backedges. 0 proven. 4624 refuted. 0 times theorem prover too weak. 11526 trivial. 0 not checked. [2022-03-20 12:51:59,111 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1810326677] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:51:59,114 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:51:59,114 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 71, 71] total 143 [2022-03-20 12:51:59,114 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:51:59,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1302221369] [2022-03-20 12:51:59,114 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1302221369] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:51:59,115 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:51:59,115 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [73] imperfect sequences [] total 73 [2022-03-20 12:51:59,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352903162] [2022-03-20 12:51:59,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:51:59,115 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-03-20 12:51:59,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:51:59,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-03-20 12:51:59,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9874, Invalid=10432, Unknown=0, NotChecked=0, Total=20306 [2022-03-20 12:51:59,118 INFO L87 Difference]: Start difference. First operand 1590 states and 2271 transitions. Second operand has 73 states, 73 states have (on average 2.1506849315068495) internal successors, (157), 71 states have internal predecessors, (157), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 12:52:05,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:52:05,822 INFO L93 Difference]: Finished difference Result 3092 states and 4548 transitions. [2022-03-20 12:52:05,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-03-20 12:52:05,823 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 2.1506849315068495) internal successors, (157), 71 states have internal predecessors, (157), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 498 [2022-03-20 12:52:05,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:52:05,825 INFO L225 Difference]: With dead ends: 3092 [2022-03-20 12:52:05,825 INFO L226 Difference]: Without dead ends: 1645 [2022-03-20 12:52:05,829 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1142 GetRequests, 930 SyntacticMatches, 0 SemanticMatches, 212 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3028 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=19821, Invalid=25761, Unknown=0, NotChecked=0, Total=45582 [2022-03-20 12:52:05,829 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 4180 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 3939 mSolverCounterSat, 1989 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4184 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 5928 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1989 IncrementalHoareTripleChecker+Valid, 3939 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-03-20 12:52:05,829 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [4184 Valid, 49 Invalid, 5928 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1989 Valid, 3939 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-03-20 12:52:05,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1645 states. [2022-03-20 12:52:06,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1645 to 1613. [2022-03-20 12:52:06,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1613 states, 1398 states have (on average 1.3490701001430616) internal successors, (1886), 1398 states have internal predecessors, (1886), 210 states have call successors, (210), 6 states have call predecessors, (210), 4 states have return successors, (208), 208 states have call predecessors, (208), 208 states have call successors, (208) [2022-03-20 12:52:06,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1613 states to 1613 states and 2304 transitions. [2022-03-20 12:52:06,588 INFO L78 Accepts]: Start accepts. Automaton has 1613 states and 2304 transitions. Word has length 498 [2022-03-20 12:52:06,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:52:06,590 INFO L478 AbstractCegarLoop]: Abstraction has 1613 states and 2304 transitions. [2022-03-20 12:52:06,590 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 2.1506849315068495) internal successors, (157), 71 states have internal predecessors, (157), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 12:52:06,590 INFO L276 IsEmpty]: Start isEmpty. Operand 1613 states and 2304 transitions. [2022-03-20 12:52:06,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 506 [2022-03-20 12:52:06,593 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:52:06,593 INFO L499 BasicCegarLoop]: trace histogram [69, 69, 69, 69, 69, 69, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:52:06,616 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2022-03-20 12:52:06,798 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable70 [2022-03-20 12:52:06,799 INFO L403 AbstractCegarLoop]: === Iteration 72 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:52:06,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:52:06,799 INFO L85 PathProgramCache]: Analyzing trace with hash -90358015, now seen corresponding path program 135 times [2022-03-20 12:52:06,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:52:06,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1959398568] [2022-03-20 12:52:06,800 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:52:06,800 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:52:06,800 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:52:06,800 INFO L85 PathProgramCache]: Analyzing trace with hash -90358015, now seen corresponding path program 136 times [2022-03-20 12:52:06,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:52:06,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728488720] [2022-03-20 12:52:06,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:52:06,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:52:06,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:52:08,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:52:08,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:52:08,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 490 [2022-03-20 12:52:08,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:52:08,459 INFO L134 CoverageAnalysis]: Checked inductivity of 16629 backedges. 0 proven. 4761 refuted. 0 times theorem prover too weak. 11868 trivial. 0 not checked. [2022-03-20 12:52:08,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:52:08,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728488720] [2022-03-20 12:52:08,459 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728488720] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:52:08,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213352596] [2022-03-20 12:52:08,460 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 12:52:08,460 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:52:08,460 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:52:08,461 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 12:52:08,462 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-03-20 12:52:09,192 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 12:52:09,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:52:09,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 1904 conjuncts, 71 conjunts are in the unsatisfiable core [2022-03-20 12:52:09,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:52:09,804 INFO L134 CoverageAnalysis]: Checked inductivity of 16629 backedges. 0 proven. 4761 refuted. 0 times theorem prover too weak. 11868 trivial. 0 not checked. [2022-03-20 12:52:09,804 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:52:13,221 INFO L134 CoverageAnalysis]: Checked inductivity of 16629 backedges. 0 proven. 4761 refuted. 0 times theorem prover too weak. 11868 trivial. 0 not checked. [2022-03-20 12:52:13,221 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1213352596] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:52:13,221 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:52:13,221 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 72, 72] total 145 [2022-03-20 12:52:13,222 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:52:13,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1959398568] [2022-03-20 12:52:13,222 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1959398568] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:52:13,222 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:52:13,222 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [74] imperfect sequences [] total 74 [2022-03-20 12:52:13,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50531395] [2022-03-20 12:52:13,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:52:13,223 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-03-20 12:52:13,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:52:13,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-03-20 12:52:13,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10157, Invalid=10723, Unknown=0, NotChecked=0, Total=20880 [2022-03-20 12:52:13,227 INFO L87 Difference]: Start difference. First operand 1613 states and 2304 transitions. Second operand has 74 states, 74 states have (on average 2.1486486486486487) internal successors, (159), 72 states have internal predecessors, (159), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 12:52:20,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:52:20,128 INFO L93 Difference]: Finished difference Result 3136 states and 4613 transitions. [2022-03-20 12:52:20,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-03-20 12:52:20,129 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 2.1486486486486487) internal successors, (159), 72 states have internal predecessors, (159), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 505 [2022-03-20 12:52:20,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:52:20,141 INFO L225 Difference]: With dead ends: 3136 [2022-03-20 12:52:20,141 INFO L226 Difference]: Without dead ends: 1668 [2022-03-20 12:52:20,144 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1158 GetRequests, 943 SyntacticMatches, 0 SemanticMatches, 215 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3107 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=20388, Invalid=26484, Unknown=0, NotChecked=0, Total=46872 [2022-03-20 12:52:20,144 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 4051 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 3919 mSolverCounterSat, 1772 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4055 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 5691 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1772 IncrementalHoareTripleChecker+Valid, 3919 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-03-20 12:52:20,144 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [4055 Valid, 59 Invalid, 5691 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1772 Valid, 3919 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-03-20 12:52:20,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1668 states. [2022-03-20 12:52:20,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1668 to 1636. [2022-03-20 12:52:20,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1636 states, 1418 states have (on average 1.349083215796897) internal successors, (1913), 1418 states have internal predecessors, (1913), 213 states have call successors, (213), 6 states have call predecessors, (213), 4 states have return successors, (211), 211 states have call predecessors, (211), 211 states have call successors, (211) [2022-03-20 12:52:20,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1636 states to 1636 states and 2337 transitions. [2022-03-20 12:52:20,927 INFO L78 Accepts]: Start accepts. Automaton has 1636 states and 2337 transitions. Word has length 505 [2022-03-20 12:52:20,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:52:20,927 INFO L478 AbstractCegarLoop]: Abstraction has 1636 states and 2337 transitions. [2022-03-20 12:52:20,927 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 2.1486486486486487) internal successors, (159), 72 states have internal predecessors, (159), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 12:52:20,927 INFO L276 IsEmpty]: Start isEmpty. Operand 1636 states and 2337 transitions. [2022-03-20 12:52:20,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 513 [2022-03-20 12:52:20,930 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:52:20,930 INFO L499 BasicCegarLoop]: trace histogram [70, 70, 70, 70, 70, 70, 70, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:52:20,954 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2022-03-20 12:52:21,145 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:52:21,146 INFO L403 AbstractCegarLoop]: === Iteration 73 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:52:21,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:52:21,146 INFO L85 PathProgramCache]: Analyzing trace with hash 1168172591, now seen corresponding path program 137 times [2022-03-20 12:52:21,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:52:21,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1752913284] [2022-03-20 12:52:21,147 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:52:21,147 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:52:21,147 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:52:21,147 INFO L85 PathProgramCache]: Analyzing trace with hash 1168172591, now seen corresponding path program 138 times [2022-03-20 12:52:21,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:52:21,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638604982] [2022-03-20 12:52:21,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:52:21,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:52:21,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:52:22,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:52:22,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:52:22,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 497 [2022-03-20 12:52:22,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:52:22,889 INFO L134 CoverageAnalysis]: Checked inductivity of 17115 backedges. 0 proven. 4900 refuted. 0 times theorem prover too weak. 12215 trivial. 0 not checked. [2022-03-20 12:52:22,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:52:22,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638604982] [2022-03-20 12:52:22,889 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638604982] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:52:22,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1211870346] [2022-03-20 12:52:22,889 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 12:52:22,889 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:52:22,889 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:52:22,890 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 12:52:22,892 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-03-20 12:52:23,421 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 12:52:23,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:52:23,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 12:52:23,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:52:24,181 INFO L134 CoverageAnalysis]: Checked inductivity of 17115 backedges. 277 proven. 1 refuted. 0 times theorem prover too weak. 16837 trivial. 0 not checked. [2022-03-20 12:52:24,181 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:52:24,518 INFO L134 CoverageAnalysis]: Checked inductivity of 17115 backedges. 277 proven. 1 refuted. 0 times theorem prover too weak. 16837 trivial. 0 not checked. [2022-03-20 12:52:24,519 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1211870346] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:52:24,519 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:52:24,519 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 7, 7] total 83 [2022-03-20 12:52:24,519 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:52:24,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1752913284] [2022-03-20 12:52:24,519 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1752913284] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:52:24,519 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:52:24,519 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [75] imperfect sequences [] total 75 [2022-03-20 12:52:24,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747475799] [2022-03-20 12:52:24,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:52:24,520 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-03-20 12:52:24,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:52:24,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-03-20 12:52:24,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2657, Invalid=4149, Unknown=0, NotChecked=0, Total=6806 [2022-03-20 12:52:24,521 INFO L87 Difference]: Start difference. First operand 1636 states and 2337 transitions. Second operand has 75 states, 75 states have (on average 2.1466666666666665) internal successors, (161), 73 states have internal predecessors, (161), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 12:52:30,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:52:30,493 INFO L93 Difference]: Finished difference Result 3180 states and 4678 transitions. [2022-03-20 12:52:30,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-03-20 12:52:30,493 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 2.1466666666666665) internal successors, (161), 73 states have internal predecessors, (161), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 512 [2022-03-20 12:52:30,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:52:30,496 INFO L225 Difference]: With dead ends: 3180 [2022-03-20 12:52:30,496 INFO L226 Difference]: Without dead ends: 1691 [2022-03-20 12:52:30,498 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1174 GetRequests, 1019 SyntacticMatches, 1 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3477 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=8062, Invalid=16118, Unknown=0, NotChecked=0, Total=24180 [2022-03-20 12:52:30,498 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 3905 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 4255 mSolverCounterSat, 1820 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3909 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 6075 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1820 IncrementalHoareTripleChecker+Valid, 4255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-03-20 12:52:30,498 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [3909 Valid, 57 Invalid, 6075 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1820 Valid, 4255 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-03-20 12:52:30,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1691 states. [2022-03-20 12:52:31,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1691 to 1659. [2022-03-20 12:52:31,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1659 states, 1438 states have (on average 1.349095966620306) internal successors, (1940), 1438 states have internal predecessors, (1940), 216 states have call successors, (216), 6 states have call predecessors, (216), 4 states have return successors, (214), 214 states have call predecessors, (214), 214 states have call successors, (214) [2022-03-20 12:52:31,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1659 states to 1659 states and 2370 transitions. [2022-03-20 12:52:31,277 INFO L78 Accepts]: Start accepts. Automaton has 1659 states and 2370 transitions. Word has length 512 [2022-03-20 12:52:31,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:52:31,277 INFO L478 AbstractCegarLoop]: Abstraction has 1659 states and 2370 transitions. [2022-03-20 12:52:31,277 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 2.1466666666666665) internal successors, (161), 73 states have internal predecessors, (161), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 12:52:31,277 INFO L276 IsEmpty]: Start isEmpty. Operand 1659 states and 2370 transitions. [2022-03-20 12:52:31,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 520 [2022-03-20 12:52:31,280 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:52:31,280 INFO L499 BasicCegarLoop]: trace histogram [71, 71, 71, 71, 71, 71, 71, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:52:31,299 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2022-03-20 12:52:31,497 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:52:31,497 INFO L403 AbstractCegarLoop]: === Iteration 74 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:52:31,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:52:31,497 INFO L85 PathProgramCache]: Analyzing trace with hash -412825027, now seen corresponding path program 139 times [2022-03-20 12:52:31,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:52:31,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1704988938] [2022-03-20 12:52:31,499 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:52:31,499 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:52:31,499 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:52:31,499 INFO L85 PathProgramCache]: Analyzing trace with hash -412825027, now seen corresponding path program 140 times [2022-03-20 12:52:31,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:52:31,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662110329] [2022-03-20 12:52:31,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:52:31,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:52:31,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:52:33,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:52:33,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:52:33,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 504 [2022-03-20 12:52:33,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:52:33,047 INFO L134 CoverageAnalysis]: Checked inductivity of 17608 backedges. 0 proven. 5041 refuted. 0 times theorem prover too weak. 12567 trivial. 0 not checked. [2022-03-20 12:52:33,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:52:33,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662110329] [2022-03-20 12:52:33,048 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662110329] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:52:33,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426526088] [2022-03-20 12:52:33,048 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 12:52:33,048 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:52:33,048 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:52:33,049 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 12:52:33,050 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-03-20 12:52:33,800 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 12:52:33,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:52:33,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 1956 conjuncts, 73 conjunts are in the unsatisfiable core [2022-03-20 12:52:33,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:52:34,333 INFO L134 CoverageAnalysis]: Checked inductivity of 17608 backedges. 0 proven. 5041 refuted. 0 times theorem prover too weak. 12567 trivial. 0 not checked. [2022-03-20 12:52:34,333 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:52:38,655 INFO L134 CoverageAnalysis]: Checked inductivity of 17608 backedges. 0 proven. 5041 refuted. 0 times theorem prover too weak. 12567 trivial. 0 not checked. [2022-03-20 12:52:38,656 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1426526088] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:52:38,656 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:52:38,656 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 74, 74] total 149 [2022-03-20 12:52:38,656 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:52:38,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1704988938] [2022-03-20 12:52:38,656 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1704988938] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:52:38,656 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:52:38,656 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [76] imperfect sequences [] total 76 [2022-03-20 12:52:38,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635605993] [2022-03-20 12:52:38,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:52:38,657 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-03-20 12:52:38,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:52:38,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-03-20 12:52:38,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10735, Invalid=11317, Unknown=0, NotChecked=0, Total=22052 [2022-03-20 12:52:38,659 INFO L87 Difference]: Start difference. First operand 1659 states and 2370 transitions. Second operand has 76 states, 76 states have (on average 2.1447368421052633) internal successors, (163), 74 states have internal predecessors, (163), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 12:52:46,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:52:46,546 INFO L93 Difference]: Finished difference Result 3224 states and 4743 transitions. [2022-03-20 12:52:46,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-03-20 12:52:46,547 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 2.1447368421052633) internal successors, (163), 74 states have internal predecessors, (163), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 519 [2022-03-20 12:52:46,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:52:46,549 INFO L225 Difference]: With dead ends: 3224 [2022-03-20 12:52:46,549 INFO L226 Difference]: Without dead ends: 1714 [2022-03-20 12:52:46,552 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1190 GetRequests, 969 SyntacticMatches, 0 SemanticMatches, 221 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3268 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=21546, Invalid=27960, Unknown=0, NotChecked=0, Total=49506 [2022-03-20 12:52:46,553 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 4388 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 4092 mSolverCounterSat, 2078 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4392 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 6170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2078 IncrementalHoareTripleChecker+Valid, 4092 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-03-20 12:52:46,553 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [4392 Valid, 53 Invalid, 6170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2078 Valid, 4092 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-03-20 12:52:46,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1714 states. [2022-03-20 12:52:47,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1714 to 1682. [2022-03-20 12:52:47,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1682 states, 1458 states have (on average 1.3491083676268862) internal successors, (1967), 1458 states have internal predecessors, (1967), 219 states have call successors, (219), 6 states have call predecessors, (219), 4 states have return successors, (217), 217 states have call predecessors, (217), 217 states have call successors, (217) [2022-03-20 12:52:47,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1682 states to 1682 states and 2403 transitions. [2022-03-20 12:52:47,376 INFO L78 Accepts]: Start accepts. Automaton has 1682 states and 2403 transitions. Word has length 519 [2022-03-20 12:52:47,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:52:47,377 INFO L478 AbstractCegarLoop]: Abstraction has 1682 states and 2403 transitions. [2022-03-20 12:52:47,377 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 2.1447368421052633) internal successors, (163), 74 states have internal predecessors, (163), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 12:52:47,377 INFO L276 IsEmpty]: Start isEmpty. Operand 1682 states and 2403 transitions. [2022-03-20 12:52:47,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 527 [2022-03-20 12:52:47,380 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:52:47,380 INFO L499 BasicCegarLoop]: trace histogram [72, 72, 72, 72, 72, 72, 72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:52:47,401 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Ended with exit code 0 [2022-03-20 12:52:47,588 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:52:47,588 INFO L403 AbstractCegarLoop]: === Iteration 75 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:52:47,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:52:47,589 INFO L85 PathProgramCache]: Analyzing trace with hash -2077557517, now seen corresponding path program 141 times [2022-03-20 12:52:47,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:52:47,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1166877374] [2022-03-20 12:52:47,590 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:52:47,590 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:52:47,590 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:52:47,590 INFO L85 PathProgramCache]: Analyzing trace with hash -2077557517, now seen corresponding path program 142 times [2022-03-20 12:52:47,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:52:47,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934476827] [2022-03-20 12:52:47,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:52:47,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:52:47,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:52:49,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:52:49,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:52:49,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 511 [2022-03-20 12:52:49,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:52:49,198 INFO L134 CoverageAnalysis]: Checked inductivity of 18108 backedges. 0 proven. 5184 refuted. 0 times theorem prover too weak. 12924 trivial. 0 not checked. [2022-03-20 12:52:49,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:52:49,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934476827] [2022-03-20 12:52:49,198 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934476827] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:52:49,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303886301] [2022-03-20 12:52:49,199 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 12:52:49,199 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:52:49,199 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:52:49,200 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 12:52:49,200 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-03-20 12:52:49,911 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 12:52:49,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:52:49,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 1982 conjuncts, 74 conjunts are in the unsatisfiable core [2022-03-20 12:52:49,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:52:50,322 INFO L134 CoverageAnalysis]: Checked inductivity of 18108 backedges. 0 proven. 5184 refuted. 0 times theorem prover too weak. 12924 trivial. 0 not checked. [2022-03-20 12:52:50,322 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:52:54,716 INFO L134 CoverageAnalysis]: Checked inductivity of 18108 backedges. 0 proven. 5184 refuted. 0 times theorem prover too weak. 12924 trivial. 0 not checked. [2022-03-20 12:52:54,716 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [303886301] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:52:54,716 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:52:54,716 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 75, 75] total 151 [2022-03-20 12:52:54,716 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:52:54,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1166877374] [2022-03-20 12:52:54,717 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1166877374] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:52:54,717 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:52:54,717 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [77] imperfect sequences [] total 77 [2022-03-20 12:52:54,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698028569] [2022-03-20 12:52:54,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:52:54,717 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-03-20 12:52:54,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:52:54,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-03-20 12:52:54,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11030, Invalid=11620, Unknown=0, NotChecked=0, Total=22650 [2022-03-20 12:52:54,720 INFO L87 Difference]: Start difference. First operand 1682 states and 2403 transitions. Second operand has 77 states, 77 states have (on average 2.142857142857143) internal successors, (165), 75 states have internal predecessors, (165), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 12:53:02,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:53:02,998 INFO L93 Difference]: Finished difference Result 3268 states and 4808 transitions. [2022-03-20 12:53:02,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-03-20 12:53:02,998 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 2.142857142857143) internal successors, (165), 75 states have internal predecessors, (165), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 526 [2022-03-20 12:53:02,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:53:03,001 INFO L225 Difference]: With dead ends: 3268 [2022-03-20 12:53:03,001 INFO L226 Difference]: Without dead ends: 1737 [2022-03-20 12:53:03,005 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1206 GetRequests, 982 SyntacticMatches, 0 SemanticMatches, 224 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3350 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=22137, Invalid=28713, Unknown=0, NotChecked=0, Total=50850 [2022-03-20 12:53:03,005 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 4395 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 4066 mSolverCounterSat, 2012 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4399 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 6078 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2012 IncrementalHoareTripleChecker+Valid, 4066 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-03-20 12:53:03,005 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [4399 Valid, 53 Invalid, 6078 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2012 Valid, 4066 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-03-20 12:53:03,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1737 states. [2022-03-20 12:53:03,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1737 to 1705. [2022-03-20 12:53:03,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1705 states, 1478 states have (on average 1.3491204330175914) internal successors, (1994), 1478 states have internal predecessors, (1994), 222 states have call successors, (222), 6 states have call predecessors, (222), 4 states have return successors, (220), 220 states have call predecessors, (220), 220 states have call successors, (220) [2022-03-20 12:53:03,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1705 states to 1705 states and 2436 transitions. [2022-03-20 12:53:03,848 INFO L78 Accepts]: Start accepts. Automaton has 1705 states and 2436 transitions. Word has length 526 [2022-03-20 12:53:03,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:53:03,848 INFO L478 AbstractCegarLoop]: Abstraction has 1705 states and 2436 transitions. [2022-03-20 12:53:03,848 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 2.142857142857143) internal successors, (165), 75 states have internal predecessors, (165), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 12:53:03,848 INFO L276 IsEmpty]: Start isEmpty. Operand 1705 states and 2436 transitions. [2022-03-20 12:53:03,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 534 [2022-03-20 12:53:03,852 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:53:03,852 INFO L499 BasicCegarLoop]: trace histogram [73, 73, 73, 73, 73, 73, 73, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:53:03,873 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Ended with exit code 0 [2022-03-20 12:53:04,073 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2022-03-20 12:53:04,073 INFO L403 AbstractCegarLoop]: === Iteration 76 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:53:04,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:53:04,073 INFO L85 PathProgramCache]: Analyzing trace with hash 388055417, now seen corresponding path program 143 times [2022-03-20 12:53:04,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:53:04,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1954657213] [2022-03-20 12:53:04,075 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:53:04,075 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:53:04,075 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:53:04,075 INFO L85 PathProgramCache]: Analyzing trace with hash 388055417, now seen corresponding path program 144 times [2022-03-20 12:53:04,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:53:04,075 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862874358] [2022-03-20 12:53:04,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:53:04,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:53:04,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:53:05,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:53:05,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:53:05,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 518 [2022-03-20 12:53:05,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:53:05,816 INFO L134 CoverageAnalysis]: Checked inductivity of 18615 backedges. 0 proven. 5329 refuted. 0 times theorem prover too weak. 13286 trivial. 0 not checked. [2022-03-20 12:53:05,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:53:05,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862874358] [2022-03-20 12:53:05,817 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862874358] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:53:05,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705251660] [2022-03-20 12:53:05,817 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 12:53:05,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:53:05,817 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:53:05,818 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 12:53:05,819 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-03-20 12:53:06,443 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 12:53:06,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:53:06,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 12:53:06,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:53:07,084 INFO L134 CoverageAnalysis]: Checked inductivity of 18615 backedges. 289 proven. 1 refuted. 0 times theorem prover too weak. 18325 trivial. 0 not checked. [2022-03-20 12:53:07,084 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:53:07,553 INFO L134 CoverageAnalysis]: Checked inductivity of 18615 backedges. 289 proven. 1 refuted. 0 times theorem prover too weak. 18325 trivial. 0 not checked. [2022-03-20 12:53:07,553 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1705251660] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:53:07,553 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:53:07,553 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 7, 7] total 86 [2022-03-20 12:53:07,553 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:53:07,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1954657213] [2022-03-20 12:53:07,554 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1954657213] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:53:07,554 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:53:07,554 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [78] imperfect sequences [] total 78 [2022-03-20 12:53:07,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199206107] [2022-03-20 12:53:07,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:53:07,554 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2022-03-20 12:53:07,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:53:07,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2022-03-20 12:53:07,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2879, Invalid=4431, Unknown=0, NotChecked=0, Total=7310 [2022-03-20 12:53:07,555 INFO L87 Difference]: Start difference. First operand 1705 states and 2436 transitions. Second operand has 78 states, 78 states have (on average 2.141025641025641) internal successors, (167), 76 states have internal predecessors, (167), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 12:53:14,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:53:14,564 INFO L93 Difference]: Finished difference Result 3312 states and 4873 transitions. [2022-03-20 12:53:14,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-03-20 12:53:14,564 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 2.141025641025641) internal successors, (167), 76 states have internal predecessors, (167), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 533 [2022-03-20 12:53:14,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:53:14,567 INFO L225 Difference]: With dead ends: 3312 [2022-03-20 12:53:14,567 INFO L226 Difference]: Without dead ends: 1760 [2022-03-20 12:53:14,569 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1222 GetRequests, 1061 SyntacticMatches, 1 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3735 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=8734, Invalid=17348, Unknown=0, NotChecked=0, Total=26082 [2022-03-20 12:53:14,569 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 4273 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 4462 mSolverCounterSat, 2044 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4277 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 6506 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2044 IncrementalHoareTripleChecker+Valid, 4462 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-03-20 12:53:14,569 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [4277 Valid, 57 Invalid, 6506 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2044 Valid, 4462 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-03-20 12:53:14,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1760 states. [2022-03-20 12:53:15,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1760 to 1728. [2022-03-20 12:53:15,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1728 states, 1498 states have (on average 1.34913217623498) internal successors, (2021), 1498 states have internal predecessors, (2021), 225 states have call successors, (225), 6 states have call predecessors, (225), 4 states have return successors, (223), 223 states have call predecessors, (223), 223 states have call successors, (223) [2022-03-20 12:53:15,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1728 states to 1728 states and 2469 transitions. [2022-03-20 12:53:15,433 INFO L78 Accepts]: Start accepts. Automaton has 1728 states and 2469 transitions. Word has length 533 [2022-03-20 12:53:15,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:53:15,434 INFO L478 AbstractCegarLoop]: Abstraction has 1728 states and 2469 transitions. [2022-03-20 12:53:15,434 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 2.141025641025641) internal successors, (167), 76 states have internal predecessors, (167), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 12:53:15,434 INFO L276 IsEmpty]: Start isEmpty. Operand 1728 states and 2469 transitions. [2022-03-20 12:53:15,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 541 [2022-03-20 12:53:15,437 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:53:15,437 INFO L499 BasicCegarLoop]: trace histogram [74, 74, 74, 74, 74, 74, 74, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:53:15,456 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Ended with exit code 0 [2022-03-20 12:53:15,652 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:53:15,652 INFO L403 AbstractCegarLoop]: === Iteration 77 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:53:15,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:53:15,653 INFO L85 PathProgramCache]: Analyzing trace with hash -1946171465, now seen corresponding path program 145 times [2022-03-20 12:53:15,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:53:15,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [719434790] [2022-03-20 12:53:15,654 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:53:15,654 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:53:15,654 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:53:15,654 INFO L85 PathProgramCache]: Analyzing trace with hash -1946171465, now seen corresponding path program 146 times [2022-03-20 12:53:15,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:53:15,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736512151] [2022-03-20 12:53:15,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:53:15,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:53:15,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:53:17,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:53:17,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:53:17,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 525 [2022-03-20 12:53:17,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:53:17,558 INFO L134 CoverageAnalysis]: Checked inductivity of 19129 backedges. 0 proven. 5476 refuted. 0 times theorem prover too weak. 13653 trivial. 0 not checked. [2022-03-20 12:53:17,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:53:17,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736512151] [2022-03-20 12:53:17,559 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736512151] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:53:17,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195157281] [2022-03-20 12:53:17,559 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 12:53:17,559 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:53:17,559 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:53:17,560 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 12:53:17,561 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-03-20 12:53:18,316 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 12:53:18,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:53:18,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 2034 conjuncts, 76 conjunts are in the unsatisfiable core [2022-03-20 12:53:18,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:53:18,912 INFO L134 CoverageAnalysis]: Checked inductivity of 19129 backedges. 0 proven. 5476 refuted. 0 times theorem prover too weak. 13653 trivial. 0 not checked. [2022-03-20 12:53:18,913 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:53:22,442 INFO L134 CoverageAnalysis]: Checked inductivity of 19129 backedges. 0 proven. 5476 refuted. 0 times theorem prover too weak. 13653 trivial. 0 not checked. [2022-03-20 12:53:22,442 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [195157281] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:53:22,442 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:53:22,442 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 77, 77] total 155 [2022-03-20 12:53:22,442 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:53:22,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [719434790] [2022-03-20 12:53:22,442 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [719434790] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:53:22,442 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:53:22,443 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [79] imperfect sequences [] total 79 [2022-03-20 12:53:22,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086921930] [2022-03-20 12:53:22,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:53:22,443 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2022-03-20 12:53:22,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:53:22,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2022-03-20 12:53:22,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11632, Invalid=12238, Unknown=0, NotChecked=0, Total=23870 [2022-03-20 12:53:22,446 INFO L87 Difference]: Start difference. First operand 1728 states and 2469 transitions. Second operand has 79 states, 79 states have (on average 2.1392405063291138) internal successors, (169), 77 states have internal predecessors, (169), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 12:53:30,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:53:30,794 INFO L93 Difference]: Finished difference Result 3356 states and 4938 transitions. [2022-03-20 12:53:30,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-03-20 12:53:30,794 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 2.1392405063291138) internal successors, (169), 77 states have internal predecessors, (169), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 540 [2022-03-20 12:53:30,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:53:30,797 INFO L225 Difference]: With dead ends: 3356 [2022-03-20 12:53:30,797 INFO L226 Difference]: Without dead ends: 1783 [2022-03-20 12:53:30,800 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1238 GetRequests, 1008 SyntacticMatches, 0 SemanticMatches, 230 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3517 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=23343, Invalid=30249, Unknown=0, NotChecked=0, Total=53592 [2022-03-20 12:53:30,800 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 4226 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 4431 mSolverCounterSat, 2058 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4230 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 6489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2058 IncrementalHoareTripleChecker+Valid, 4431 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-03-20 12:53:30,800 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [4230 Valid, 53 Invalid, 6489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2058 Valid, 4431 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-03-20 12:53:30,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1783 states. [2022-03-20 12:53:31,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1783 to 1751. [2022-03-20 12:53:31,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1751 states, 1518 states have (on average 1.3491436100131753) internal successors, (2048), 1518 states have internal predecessors, (2048), 228 states have call successors, (228), 6 states have call predecessors, (228), 4 states have return successors, (226), 226 states have call predecessors, (226), 226 states have call successors, (226) [2022-03-20 12:53:31,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1751 states to 1751 states and 2502 transitions. [2022-03-20 12:53:31,705 INFO L78 Accepts]: Start accepts. Automaton has 1751 states and 2502 transitions. Word has length 540 [2022-03-20 12:53:31,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:53:31,705 INFO L478 AbstractCegarLoop]: Abstraction has 1751 states and 2502 transitions. [2022-03-20 12:53:31,705 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 2.1392405063291138) internal successors, (169), 77 states have internal predecessors, (169), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 12:53:31,705 INFO L276 IsEmpty]: Start isEmpty. Operand 1751 states and 2502 transitions. [2022-03-20 12:53:31,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 548 [2022-03-20 12:53:31,709 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:53:31,709 INFO L499 BasicCegarLoop]: trace histogram [75, 75, 75, 75, 75, 75, 75, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:53:31,737 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2022-03-20 12:53:31,928 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:53:31,929 INFO L403 AbstractCegarLoop]: === Iteration 78 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:53:31,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:53:31,929 INFO L85 PathProgramCache]: Analyzing trace with hash 137585845, now seen corresponding path program 147 times [2022-03-20 12:53:31,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:53:31,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2431832] [2022-03-20 12:53:31,930 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:53:31,930 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:53:31,930 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:53:31,930 INFO L85 PathProgramCache]: Analyzing trace with hash 137585845, now seen corresponding path program 148 times [2022-03-20 12:53:31,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:53:31,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169898573] [2022-03-20 12:53:31,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:53:31,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:53:31,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:53:33,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:53:33,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:53:33,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 532 [2022-03-20 12:53:33,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:53:33,877 INFO L134 CoverageAnalysis]: Checked inductivity of 19650 backedges. 0 proven. 5625 refuted. 0 times theorem prover too weak. 14025 trivial. 0 not checked. [2022-03-20 12:53:33,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:53:33,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169898573] [2022-03-20 12:53:33,877 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169898573] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:53:33,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530709632] [2022-03-20 12:53:33,878 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 12:53:33,878 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:53:33,878 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:53:33,880 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 12:53:33,881 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-03-20 12:53:34,616 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 12:53:34,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:53:34,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 2060 conjuncts, 77 conjunts are in the unsatisfiable core [2022-03-20 12:53:34,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:53:35,374 INFO L134 CoverageAnalysis]: Checked inductivity of 19650 backedges. 0 proven. 14024 refuted. 0 times theorem prover too weak. 5626 trivial. 0 not checked. [2022-03-20 12:53:35,374 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:53:39,398 INFO L134 CoverageAnalysis]: Checked inductivity of 19650 backedges. 0 proven. 14024 refuted. 0 times theorem prover too weak. 5626 trivial. 0 not checked. [2022-03-20 12:53:39,398 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [530709632] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:53:39,398 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:53:39,398 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 78, 78] total 157 [2022-03-20 12:53:39,398 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:53:39,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2431832] [2022-03-20 12:53:39,398 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2431832] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:53:39,398 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:53:39,399 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [80] imperfect sequences [] total 80 [2022-03-20 12:53:39,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779395436] [2022-03-20 12:53:39,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:53:39,399 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2022-03-20 12:53:39,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:53:39,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2022-03-20 12:53:39,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11939, Invalid=12553, Unknown=0, NotChecked=0, Total=24492 [2022-03-20 12:53:39,402 INFO L87 Difference]: Start difference. First operand 1751 states and 2502 transitions. Second operand has 80 states, 80 states have (on average 2.1375) internal successors, (171), 78 states have internal predecessors, (171), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 12:53:48,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:53:48,475 INFO L93 Difference]: Finished difference Result 3400 states and 5003 transitions. [2022-03-20 12:53:48,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-03-20 12:53:48,475 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 2.1375) internal successors, (171), 78 states have internal predecessors, (171), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 547 [2022-03-20 12:53:48,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:53:48,478 INFO L225 Difference]: With dead ends: 3400 [2022-03-20 12:53:48,478 INFO L226 Difference]: Without dead ends: 1806 [2022-03-20 12:53:48,482 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1254 GetRequests, 1021 SyntacticMatches, 0 SemanticMatches, 233 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3602 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=23958, Invalid=31032, Unknown=0, NotChecked=0, Total=54990 [2022-03-20 12:53:48,482 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 4249 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 4820 mSolverCounterSat, 1940 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4253 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 6760 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1940 IncrementalHoareTripleChecker+Valid, 4820 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-03-20 12:53:48,482 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [4253 Valid, 57 Invalid, 6760 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1940 Valid, 4820 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-03-20 12:53:48,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1806 states. [2022-03-20 12:53:49,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1806 to 1774. [2022-03-20 12:53:49,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1774 states, 1538 states have (on average 1.349154746423927) internal successors, (2075), 1538 states have internal predecessors, (2075), 231 states have call successors, (231), 6 states have call predecessors, (231), 4 states have return successors, (229), 229 states have call predecessors, (229), 229 states have call successors, (229) [2022-03-20 12:53:49,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1774 states to 1774 states and 2535 transitions. [2022-03-20 12:53:49,468 INFO L78 Accepts]: Start accepts. Automaton has 1774 states and 2535 transitions. Word has length 547 [2022-03-20 12:53:49,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:53:49,469 INFO L478 AbstractCegarLoop]: Abstraction has 1774 states and 2535 transitions. [2022-03-20 12:53:49,469 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 2.1375) internal successors, (171), 78 states have internal predecessors, (171), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 12:53:49,469 INFO L276 IsEmpty]: Start isEmpty. Operand 1774 states and 2535 transitions. [2022-03-20 12:53:49,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 555 [2022-03-20 12:53:49,472 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:53:49,473 INFO L499 BasicCegarLoop]: trace histogram [76, 76, 76, 76, 76, 76, 76, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:53:49,495 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2022-03-20 12:53:49,687 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2022-03-20 12:53:49,687 INFO L403 AbstractCegarLoop]: === Iteration 79 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:53:49,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:53:49,688 INFO L85 PathProgramCache]: Analyzing trace with hash -444692869, now seen corresponding path program 149 times [2022-03-20 12:53:49,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:53:49,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1288064560] [2022-03-20 12:53:49,689 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:53:49,689 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:53:49,689 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:53:49,689 INFO L85 PathProgramCache]: Analyzing trace with hash -444692869, now seen corresponding path program 150 times [2022-03-20 12:53:49,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:53:49,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794845119] [2022-03-20 12:53:49,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:53:49,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:53:49,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:53:51,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:53:51,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:53:51,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 539 [2022-03-20 12:53:51,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:53:51,109 INFO L134 CoverageAnalysis]: Checked inductivity of 20178 backedges. 0 proven. 5776 refuted. 0 times theorem prover too weak. 14402 trivial. 0 not checked. [2022-03-20 12:53:51,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:53:51,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794845119] [2022-03-20 12:53:51,110 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794845119] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:53:51,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [253115929] [2022-03-20 12:53:51,110 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 12:53:51,110 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:53:51,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:53:51,111 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 12:53:51,112 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2022-03-20 12:53:51,808 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 12:53:51,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:53:51,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 12:53:51,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:53:52,192 INFO L134 CoverageAnalysis]: Checked inductivity of 20178 backedges. 301 proven. 1 refuted. 0 times theorem prover too weak. 19876 trivial. 0 not checked. [2022-03-20 12:53:52,193 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:53:52,575 INFO L134 CoverageAnalysis]: Checked inductivity of 20178 backedges. 301 proven. 1 refuted. 0 times theorem prover too weak. 19876 trivial. 0 not checked. [2022-03-20 12:53:52,575 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [253115929] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:53:52,575 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:53:52,575 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 7, 7] total 89 [2022-03-20 12:53:52,576 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:53:52,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1288064560] [2022-03-20 12:53:52,576 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1288064560] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:53:52,576 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:53:52,576 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [81] imperfect sequences [] total 81 [2022-03-20 12:53:52,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839667087] [2022-03-20 12:53:52,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:53:52,576 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2022-03-20 12:53:52,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:53:52,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2022-03-20 12:53:52,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3110, Invalid=4722, Unknown=0, NotChecked=0, Total=7832 [2022-03-20 12:53:52,578 INFO L87 Difference]: Start difference. First operand 1774 states and 2535 transitions. Second operand has 81 states, 81 states have (on average 2.1358024691358026) internal successors, (173), 79 states have internal predecessors, (173), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 12:53:59,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:53:59,741 INFO L93 Difference]: Finished difference Result 3444 states and 5068 transitions. [2022-03-20 12:53:59,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-03-20 12:53:59,741 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 2.1358024691358026) internal successors, (173), 79 states have internal predecessors, (173), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 554 [2022-03-20 12:53:59,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:53:59,744 INFO L225 Difference]: With dead ends: 3444 [2022-03-20 12:53:59,744 INFO L226 Difference]: Without dead ends: 1829 [2022-03-20 12:53:59,747 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1270 GetRequests, 1103 SyntacticMatches, 1 SemanticMatches, 166 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4002 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=9433, Invalid=18623, Unknown=0, NotChecked=0, Total=28056 [2022-03-20 12:53:59,747 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 4339 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 4612 mSolverCounterSat, 1923 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4343 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 6535 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1923 IncrementalHoareTripleChecker+Valid, 4612 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-03-20 12:53:59,748 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [4343 Valid, 57 Invalid, 6535 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1923 Valid, 4612 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-03-20 12:53:59,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1829 states. [2022-03-20 12:54:00,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1829 to 1797. [2022-03-20 12:54:00,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1797 states, 1558 states have (on average 1.3491655969191272) internal successors, (2102), 1558 states have internal predecessors, (2102), 234 states have call successors, (234), 6 states have call predecessors, (234), 4 states have return successors, (232), 232 states have call predecessors, (232), 232 states have call successors, (232) [2022-03-20 12:54:00,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1797 states to 1797 states and 2568 transitions. [2022-03-20 12:54:00,687 INFO L78 Accepts]: Start accepts. Automaton has 1797 states and 2568 transitions. Word has length 554 [2022-03-20 12:54:00,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:54:00,687 INFO L478 AbstractCegarLoop]: Abstraction has 1797 states and 2568 transitions. [2022-03-20 12:54:00,687 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 2.1358024691358026) internal successors, (173), 79 states have internal predecessors, (173), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 12:54:00,687 INFO L276 IsEmpty]: Start isEmpty. Operand 1797 states and 2568 transitions. [2022-03-20 12:54:00,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 562 [2022-03-20 12:54:00,696 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:54:00,696 INFO L499 BasicCegarLoop]: trace histogram [77, 77, 77, 77, 77, 77, 77, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:54:00,716 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Ended with exit code 0 [2022-03-20 12:54:00,916 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2022-03-20 12:54:00,916 INFO L403 AbstractCegarLoop]: === Iteration 80 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:54:00,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:54:00,916 INFO L85 PathProgramCache]: Analyzing trace with hash 41677809, now seen corresponding path program 151 times [2022-03-20 12:54:00,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:54:00,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [24790968] [2022-03-20 12:54:00,918 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:54:00,918 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:54:00,918 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:54:00,918 INFO L85 PathProgramCache]: Analyzing trace with hash 41677809, now seen corresponding path program 152 times [2022-03-20 12:54:00,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:54:00,918 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144523268] [2022-03-20 12:54:00,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:54:00,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:54:00,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:54:02,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:54:02,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:54:02,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 546 [2022-03-20 12:54:02,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:54:02,904 INFO L134 CoverageAnalysis]: Checked inductivity of 20713 backedges. 0 proven. 5929 refuted. 0 times theorem prover too weak. 14784 trivial. 0 not checked. [2022-03-20 12:54:02,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:54:02,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144523268] [2022-03-20 12:54:02,905 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144523268] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:54:02,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20631232] [2022-03-20 12:54:02,905 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 12:54:02,905 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:54:02,905 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:54:02,906 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 12:54:02,907 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2022-03-20 12:54:03,683 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 12:54:03,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:54:03,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 2112 conjuncts, 79 conjunts are in the unsatisfiable core [2022-03-20 12:54:03,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:54:04,404 INFO L134 CoverageAnalysis]: Checked inductivity of 20713 backedges. 0 proven. 5929 refuted. 0 times theorem prover too weak. 14784 trivial. 0 not checked. [2022-03-20 12:54:04,405 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:54:08,085 INFO L134 CoverageAnalysis]: Checked inductivity of 20713 backedges. 0 proven. 5929 refuted. 0 times theorem prover too weak. 14784 trivial. 0 not checked. [2022-03-20 12:54:08,086 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [20631232] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:54:08,086 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:54:08,086 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 80, 80] total 161 [2022-03-20 12:54:08,086 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:54:08,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [24790968] [2022-03-20 12:54:08,087 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [24790968] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:54:08,087 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:54:08,087 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [82] imperfect sequences [] total 82 [2022-03-20 12:54:08,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387739702] [2022-03-20 12:54:08,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:54:08,088 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2022-03-20 12:54:08,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:54:08,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2022-03-20 12:54:08,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12565, Invalid=13195, Unknown=0, NotChecked=0, Total=25760 [2022-03-20 12:54:08,094 INFO L87 Difference]: Start difference. First operand 1797 states and 2568 transitions. Second operand has 82 states, 82 states have (on average 2.1341463414634148) internal successors, (175), 80 states have internal predecessors, (175), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 12:54:18,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:54:18,020 INFO L93 Difference]: Finished difference Result 3488 states and 5133 transitions. [2022-03-20 12:54:18,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-03-20 12:54:18,020 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 2.1341463414634148) internal successors, (175), 80 states have internal predecessors, (175), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 561 [2022-03-20 12:54:18,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:54:18,029 INFO L225 Difference]: With dead ends: 3488 [2022-03-20 12:54:18,029 INFO L226 Difference]: Without dead ends: 1852 [2022-03-20 12:54:18,033 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1286 GetRequests, 1047 SyntacticMatches, 0 SemanticMatches, 239 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3775 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=25212, Invalid=32628, Unknown=0, NotChecked=0, Total=57840 [2022-03-20 12:54:18,033 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 4679 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 4512 mSolverCounterSat, 2189 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4683 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 6701 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2189 IncrementalHoareTripleChecker+Valid, 4512 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-03-20 12:54:18,033 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [4683 Valid, 51 Invalid, 6701 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2189 Valid, 4512 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-03-20 12:54:18,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1852 states. [2022-03-20 12:54:19,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1852 to 1820. [2022-03-20 12:54:19,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1820 states, 1578 states have (on average 1.3491761723700888) internal successors, (2129), 1578 states have internal predecessors, (2129), 237 states have call successors, (237), 6 states have call predecessors, (237), 4 states have return successors, (235), 235 states have call predecessors, (235), 235 states have call successors, (235) [2022-03-20 12:54:19,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1820 states to 1820 states and 2601 transitions. [2022-03-20 12:54:19,026 INFO L78 Accepts]: Start accepts. Automaton has 1820 states and 2601 transitions. Word has length 561 [2022-03-20 12:54:19,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:54:19,026 INFO L478 AbstractCegarLoop]: Abstraction has 1820 states and 2601 transitions. [2022-03-20 12:54:19,026 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 2.1341463414634148) internal successors, (175), 80 states have internal predecessors, (175), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 12:54:19,026 INFO L276 IsEmpty]: Start isEmpty. Operand 1820 states and 2601 transitions. [2022-03-20 12:54:19,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 569 [2022-03-20 12:54:19,029 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:54:19,030 INFO L499 BasicCegarLoop]: trace histogram [78, 78, 78, 78, 78, 78, 78, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:54:19,051 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2022-03-20 12:54:19,231 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:54:19,232 INFO L403 AbstractCegarLoop]: === Iteration 81 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:54:19,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:54:19,232 INFO L85 PathProgramCache]: Analyzing trace with hash 562460991, now seen corresponding path program 153 times [2022-03-20 12:54:19,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:54:19,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [431960794] [2022-03-20 12:54:19,233 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:54:19,233 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:54:19,233 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:54:19,234 INFO L85 PathProgramCache]: Analyzing trace with hash 562460991, now seen corresponding path program 154 times [2022-03-20 12:54:19,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:54:19,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056898912] [2022-03-20 12:54:19,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:54:19,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:54:19,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:54:20,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:54:20,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:54:20,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 553 [2022-03-20 12:54:20,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:54:20,860 INFO L134 CoverageAnalysis]: Checked inductivity of 21255 backedges. 0 proven. 6084 refuted. 0 times theorem prover too weak. 15171 trivial. 0 not checked. [2022-03-20 12:54:20,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:54:20,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056898912] [2022-03-20 12:54:20,860 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056898912] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:54:20,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [413495782] [2022-03-20 12:54:20,860 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 12:54:20,860 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:54:20,861 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:54:20,862 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 12:54:20,862 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2022-03-20 12:54:21,671 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 12:54:21,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:54:21,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 2138 conjuncts, 80 conjunts are in the unsatisfiable core [2022-03-20 12:54:21,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:54:22,148 INFO L134 CoverageAnalysis]: Checked inductivity of 21255 backedges. 0 proven. 6084 refuted. 0 times theorem prover too weak. 15171 trivial. 0 not checked. [2022-03-20 12:54:22,148 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:54:27,670 INFO L134 CoverageAnalysis]: Checked inductivity of 21255 backedges. 0 proven. 6084 refuted. 0 times theorem prover too weak. 15171 trivial. 0 not checked. [2022-03-20 12:54:27,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [413495782] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:54:27,670 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:54:27,670 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 81, 81] total 163 [2022-03-20 12:54:27,670 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:54:27,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [431960794] [2022-03-20 12:54:27,671 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [431960794] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:54:27,671 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:54:27,671 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [83] imperfect sequences [] total 83 [2022-03-20 12:54:27,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207210609] [2022-03-20 12:54:27,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:54:27,671 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2022-03-20 12:54:27,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:54:27,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2022-03-20 12:54:27,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12884, Invalid=13522, Unknown=0, NotChecked=0, Total=26406 [2022-03-20 12:54:27,673 INFO L87 Difference]: Start difference. First operand 1820 states and 2601 transitions. Second operand has 83 states, 83 states have (on average 2.1325301204819276) internal successors, (177), 81 states have internal predecessors, (177), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 12:54:37,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:54:37,866 INFO L93 Difference]: Finished difference Result 3532 states and 5198 transitions. [2022-03-20 12:54:37,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-03-20 12:54:37,867 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 2.1325301204819276) internal successors, (177), 81 states have internal predecessors, (177), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 568 [2022-03-20 12:54:37,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:54:37,870 INFO L225 Difference]: With dead ends: 3532 [2022-03-20 12:54:37,870 INFO L226 Difference]: Without dead ends: 1875 [2022-03-20 12:54:37,877 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1302 GetRequests, 1060 SyntacticMatches, 0 SemanticMatches, 242 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3863 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=25851, Invalid=33441, Unknown=0, NotChecked=0, Total=59292 [2022-03-20 12:54:37,878 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 4723 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 4601 mSolverCounterSat, 2151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4727 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 6752 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2151 IncrementalHoareTripleChecker+Valid, 4601 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-03-20 12:54:37,878 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [4727 Valid, 53 Invalid, 6752 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2151 Valid, 4601 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-03-20 12:54:37,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1875 states. [2022-03-20 12:54:38,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1875 to 1843. [2022-03-20 12:54:38,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1843 states, 1598 states have (on average 1.3491864831038798) internal successors, (2156), 1598 states have internal predecessors, (2156), 240 states have call successors, (240), 6 states have call predecessors, (240), 4 states have return successors, (238), 238 states have call predecessors, (238), 238 states have call successors, (238) [2022-03-20 12:54:38,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1843 states to 1843 states and 2634 transitions. [2022-03-20 12:54:38,880 INFO L78 Accepts]: Start accepts. Automaton has 1843 states and 2634 transitions. Word has length 568 [2022-03-20 12:54:38,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:54:38,880 INFO L478 AbstractCegarLoop]: Abstraction has 1843 states and 2634 transitions. [2022-03-20 12:54:38,881 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 2.1325301204819276) internal successors, (177), 81 states have internal predecessors, (177), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 12:54:38,881 INFO L276 IsEmpty]: Start isEmpty. Operand 1843 states and 2634 transitions. [2022-03-20 12:54:38,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 576 [2022-03-20 12:54:38,884 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:54:38,884 INFO L499 BasicCegarLoop]: trace histogram [79, 79, 79, 79, 79, 79, 79, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:54:38,906 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Ended with exit code 0 [2022-03-20 12:54:39,099 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:54:39,099 INFO L403 AbstractCegarLoop]: === Iteration 82 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:54:39,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:54:39,099 INFO L85 PathProgramCache]: Analyzing trace with hash 1935388461, now seen corresponding path program 155 times [2022-03-20 12:54:39,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:54:39,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1297429401] [2022-03-20 12:54:39,101 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:54:39,101 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:54:39,101 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:54:39,101 INFO L85 PathProgramCache]: Analyzing trace with hash 1935388461, now seen corresponding path program 156 times [2022-03-20 12:54:39,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:54:39,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072687932] [2022-03-20 12:54:39,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:54:39,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:54:39,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:54:41,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:54:41,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:54:41,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 560 [2022-03-20 12:54:41,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:54:41,255 INFO L134 CoverageAnalysis]: Checked inductivity of 21804 backedges. 0 proven. 6241 refuted. 0 times theorem prover too weak. 15563 trivial. 0 not checked. [2022-03-20 12:54:41,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:54:41,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072687932] [2022-03-20 12:54:41,255 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072687932] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:54:41,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318513967] [2022-03-20 12:54:41,256 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 12:54:41,256 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:54:41,256 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:54:41,257 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 12:54:41,258 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2022-03-20 12:54:41,897 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 12:54:41,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:54:41,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 12:54:41,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:54:42,734 INFO L134 CoverageAnalysis]: Checked inductivity of 21804 backedges. 313 proven. 1 refuted. 0 times theorem prover too weak. 21490 trivial. 0 not checked. [2022-03-20 12:54:42,734 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:54:43,381 INFO L134 CoverageAnalysis]: Checked inductivity of 21804 backedges. 313 proven. 1 refuted. 0 times theorem prover too weak. 21490 trivial. 0 not checked. [2022-03-20 12:54:43,381 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1318513967] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:54:43,381 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:54:43,382 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 7, 7] total 92 [2022-03-20 12:54:43,382 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:54:43,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1297429401] [2022-03-20 12:54:43,382 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1297429401] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:54:43,382 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:54:43,382 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [84] imperfect sequences [] total 84 [2022-03-20 12:54:43,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901263515] [2022-03-20 12:54:43,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:54:43,382 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2022-03-20 12:54:43,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:54:43,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2022-03-20 12:54:43,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3350, Invalid=5022, Unknown=0, NotChecked=0, Total=8372 [2022-03-20 12:54:43,384 INFO L87 Difference]: Start difference. First operand 1843 states and 2634 transitions. Second operand has 84 states, 84 states have (on average 2.130952380952381) internal successors, (179), 82 states have internal predecessors, (179), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 12:54:50,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:54:50,831 INFO L93 Difference]: Finished difference Result 3576 states and 5263 transitions. [2022-03-20 12:54:50,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-03-20 12:54:50,832 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 2.130952380952381) internal successors, (179), 82 states have internal predecessors, (179), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 575 [2022-03-20 12:54:50,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:54:50,835 INFO L225 Difference]: With dead ends: 3576 [2022-03-20 12:54:50,835 INFO L226 Difference]: Without dead ends: 1898 [2022-03-20 12:54:50,838 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1318 GetRequests, 1145 SyntacticMatches, 1 SemanticMatches, 172 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4278 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=10159, Invalid=19943, Unknown=0, NotChecked=0, Total=30102 [2022-03-20 12:54:50,838 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 4567 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 4589 mSolverCounterSat, 2090 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4571 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 6679 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2090 IncrementalHoareTripleChecker+Valid, 4589 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-03-20 12:54:50,838 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [4571 Valid, 57 Invalid, 6679 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2090 Valid, 4589 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-03-20 12:54:50,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1898 states. [2022-03-20 12:54:51,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1898 to 1866. [2022-03-20 12:54:51,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1866 states, 1618 states have (on average 1.3491965389369591) internal successors, (2183), 1618 states have internal predecessors, (2183), 243 states have call successors, (243), 6 states have call predecessors, (243), 4 states have return successors, (241), 241 states have call predecessors, (241), 241 states have call successors, (241) [2022-03-20 12:54:51,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1866 states to 1866 states and 2667 transitions. [2022-03-20 12:54:51,847 INFO L78 Accepts]: Start accepts. Automaton has 1866 states and 2667 transitions. Word has length 575 [2022-03-20 12:54:51,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:54:51,847 INFO L478 AbstractCegarLoop]: Abstraction has 1866 states and 2667 transitions. [2022-03-20 12:54:51,848 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 2.130952380952381) internal successors, (179), 82 states have internal predecessors, (179), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 12:54:51,848 INFO L276 IsEmpty]: Start isEmpty. Operand 1866 states and 2667 transitions. [2022-03-20 12:54:51,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 583 [2022-03-20 12:54:51,852 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:54:51,852 INFO L499 BasicCegarLoop]: trace histogram [80, 80, 80, 80, 80, 80, 80, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:54:51,873 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Forceful destruction successful, exit code 0 [2022-03-20 12:54:52,067 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable81 [2022-03-20 12:54:52,067 INFO L403 AbstractCegarLoop]: === Iteration 83 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:54:52,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:54:52,068 INFO L85 PathProgramCache]: Analyzing trace with hash 2104942595, now seen corresponding path program 157 times [2022-03-20 12:54:52,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:54:52,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1401392078] [2022-03-20 12:54:52,069 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:54:52,069 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:54:52,069 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:54:52,069 INFO L85 PathProgramCache]: Analyzing trace with hash 2104942595, now seen corresponding path program 158 times [2022-03-20 12:54:52,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:54:52,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679881581] [2022-03-20 12:54:52,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:54:52,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:54:52,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:54:54,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:54:54,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:54:54,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 567 [2022-03-20 12:54:54,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:54:54,306 INFO L134 CoverageAnalysis]: Checked inductivity of 22360 backedges. 0 proven. 6400 refuted. 0 times theorem prover too weak. 15960 trivial. 0 not checked. [2022-03-20 12:54:54,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:54:54,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679881581] [2022-03-20 12:54:54,306 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679881581] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:54:54,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1892502546] [2022-03-20 12:54:54,307 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 12:54:54,307 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:54:54,307 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:54:54,308 INFO L229 MonitoredProcess]: Starting monitored process 81 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 12:54:54,331 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2022-03-20 12:54:55,190 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 12:54:55,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:54:55,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 2190 conjuncts, 82 conjunts are in the unsatisfiable core [2022-03-20 12:54:55,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:54:55,899 INFO L134 CoverageAnalysis]: Checked inductivity of 22360 backedges. 0 proven. 6400 refuted. 0 times theorem prover too weak. 15960 trivial. 0 not checked. [2022-03-20 12:54:55,899 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:55:00,995 INFO L134 CoverageAnalysis]: Checked inductivity of 22360 backedges. 0 proven. 6400 refuted. 0 times theorem prover too weak. 15960 trivial. 0 not checked. [2022-03-20 12:55:00,996 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1892502546] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:55:00,996 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:55:00,996 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 83, 83] total 167 [2022-03-20 12:55:00,996 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:55:00,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1401392078] [2022-03-20 12:55:00,996 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1401392078] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:55:00,996 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:55:00,996 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [85] imperfect sequences [] total 85 [2022-03-20 12:55:00,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793269535] [2022-03-20 12:55:00,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:55:00,997 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2022-03-20 12:55:00,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:55:00,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2022-03-20 12:55:00,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13534, Invalid=14188, Unknown=0, NotChecked=0, Total=27722 [2022-03-20 12:55:00,999 INFO L87 Difference]: Start difference. First operand 1866 states and 2667 transitions. Second operand has 85 states, 85 states have (on average 2.1294117647058823) internal successors, (181), 83 states have internal predecessors, (181), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 12:55:10,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:55:10,906 INFO L93 Difference]: Finished difference Result 3620 states and 5328 transitions. [2022-03-20 12:55:10,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-03-20 12:55:10,906 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 2.1294117647058823) internal successors, (181), 83 states have internal predecessors, (181), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 582 [2022-03-20 12:55:10,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:55:10,909 INFO L225 Difference]: With dead ends: 3620 [2022-03-20 12:55:10,909 INFO L226 Difference]: Without dead ends: 1921 [2022-03-20 12:55:10,913 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1334 GetRequests, 1086 SyntacticMatches, 0 SemanticMatches, 248 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4042 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=27153, Invalid=35097, Unknown=0, NotChecked=0, Total=62250 [2022-03-20 12:55:10,913 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 4692 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 4742 mSolverCounterSat, 2293 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4696 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 7035 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2293 IncrementalHoareTripleChecker+Valid, 4742 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-03-20 12:55:10,913 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [4696 Valid, 53 Invalid, 7035 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2293 Valid, 4742 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-03-20 12:55:10,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1921 states. [2022-03-20 12:55:11,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1921 to 1889. [2022-03-20 12:55:11,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1889 states, 1638 states have (on average 1.3492063492063493) internal successors, (2210), 1638 states have internal predecessors, (2210), 246 states have call successors, (246), 6 states have call predecessors, (246), 4 states have return successors, (244), 244 states have call predecessors, (244), 244 states have call successors, (244) [2022-03-20 12:55:11,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1889 states to 1889 states and 2700 transitions. [2022-03-20 12:55:11,990 INFO L78 Accepts]: Start accepts. Automaton has 1889 states and 2700 transitions. Word has length 582 [2022-03-20 12:55:11,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:55:11,991 INFO L478 AbstractCegarLoop]: Abstraction has 1889 states and 2700 transitions. [2022-03-20 12:55:11,991 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 2.1294117647058823) internal successors, (181), 83 states have internal predecessors, (181), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 12:55:11,991 INFO L276 IsEmpty]: Start isEmpty. Operand 1889 states and 2700 transitions. [2022-03-20 12:55:11,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 590 [2022-03-20 12:55:11,995 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:55:11,995 INFO L499 BasicCegarLoop]: trace histogram [81, 81, 81, 81, 81, 81, 81, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:55:12,017 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Forceful destruction successful, exit code 0 [2022-03-20 12:55:12,203 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:55:12,204 INFO L403 AbstractCegarLoop]: === Iteration 84 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:55:12,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:55:12,204 INFO L85 PathProgramCache]: Analyzing trace with hash 1236489833, now seen corresponding path program 159 times [2022-03-20 12:55:12,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:55:12,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [362299169] [2022-03-20 12:55:12,206 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:55:12,206 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:55:12,206 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:55:12,206 INFO L85 PathProgramCache]: Analyzing trace with hash 1236489833, now seen corresponding path program 160 times [2022-03-20 12:55:12,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:55:12,206 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402738854] [2022-03-20 12:55:12,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:55:12,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:55:12,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:55:14,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:55:14,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:55:14,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 574 [2022-03-20 12:55:14,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:55:14,523 INFO L134 CoverageAnalysis]: Checked inductivity of 22923 backedges. 0 proven. 6561 refuted. 0 times theorem prover too weak. 16362 trivial. 0 not checked. [2022-03-20 12:55:14,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:55:14,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402738854] [2022-03-20 12:55:14,523 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402738854] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:55:14,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [641117611] [2022-03-20 12:55:14,523 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 12:55:14,523 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:55:14,523 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:55:14,524 INFO L229 MonitoredProcess]: Starting monitored process 82 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 12:55:14,525 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2022-03-20 12:55:15,364 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 12:55:15,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:55:15,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 2216 conjuncts, 83 conjunts are in the unsatisfiable core [2022-03-20 12:55:15,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:55:16,143 INFO L134 CoverageAnalysis]: Checked inductivity of 22923 backedges. 0 proven. 16361 refuted. 0 times theorem prover too weak. 6562 trivial. 0 not checked. [2022-03-20 12:55:16,143 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:55:22,541 INFO L134 CoverageAnalysis]: Checked inductivity of 22923 backedges. 0 proven. 16361 refuted. 0 times theorem prover too weak. 6562 trivial. 0 not checked. [2022-03-20 12:55:22,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [641117611] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:55:22,542 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:55:22,542 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 84, 84] total 169 [2022-03-20 12:55:22,542 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:55:22,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [362299169] [2022-03-20 12:55:22,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [362299169] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:55:22,542 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:55:22,542 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [86] imperfect sequences [] total 86 [2022-03-20 12:55:22,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792897399] [2022-03-20 12:55:22,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:55:22,543 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2022-03-20 12:55:22,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:55:22,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2022-03-20 12:55:22,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13865, Invalid=14527, Unknown=0, NotChecked=0, Total=28392 [2022-03-20 12:55:22,545 INFO L87 Difference]: Start difference. First operand 1889 states and 2700 transitions. Second operand has 86 states, 86 states have (on average 2.127906976744186) internal successors, (183), 84 states have internal predecessors, (183), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 12:55:33,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:55:33,029 INFO L93 Difference]: Finished difference Result 3664 states and 5393 transitions. [2022-03-20 12:55:33,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-03-20 12:55:33,029 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 2.127906976744186) internal successors, (183), 84 states have internal predecessors, (183), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 589 [2022-03-20 12:55:33,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:55:33,032 INFO L225 Difference]: With dead ends: 3664 [2022-03-20 12:55:33,032 INFO L226 Difference]: Without dead ends: 1944 [2022-03-20 12:55:33,036 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1350 GetRequests, 1099 SyntacticMatches, 0 SemanticMatches, 251 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4133 ImplicationChecksByTransitivity, 9.7s TimeCoverageRelationStatistics Valid=27816, Invalid=35940, Unknown=0, NotChecked=0, Total=63756 [2022-03-20 12:55:33,036 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 4830 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 4725 mSolverCounterSat, 2288 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4834 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 7013 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2288 IncrementalHoareTripleChecker+Valid, 4725 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-03-20 12:55:33,036 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [4834 Valid, 51 Invalid, 7013 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2288 Valid, 4725 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-03-20 12:55:33,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1944 states. [2022-03-20 12:55:34,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1944 to 1912. [2022-03-20 12:55:34,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1912 states, 1658 states have (on average 1.3492159227985525) internal successors, (2237), 1658 states have internal predecessors, (2237), 249 states have call successors, (249), 6 states have call predecessors, (249), 4 states have return successors, (247), 247 states have call predecessors, (247), 247 states have call successors, (247) [2022-03-20 12:55:34,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1912 states to 1912 states and 2733 transitions. [2022-03-20 12:55:34,114 INFO L78 Accepts]: Start accepts. Automaton has 1912 states and 2733 transitions. Word has length 589 [2022-03-20 12:55:34,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:55:34,114 INFO L478 AbstractCegarLoop]: Abstraction has 1912 states and 2733 transitions. [2022-03-20 12:55:34,114 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 2.127906976744186) internal successors, (183), 84 states have internal predecessors, (183), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 12:55:34,114 INFO L276 IsEmpty]: Start isEmpty. Operand 1912 states and 2733 transitions. [2022-03-20 12:55:34,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 597 [2022-03-20 12:55:34,118 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:55:34,118 INFO L499 BasicCegarLoop]: trace histogram [82, 82, 82, 82, 82, 82, 82, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:55:34,142 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Forceful destruction successful, exit code 0 [2022-03-20 12:55:34,332 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:55:34,332 INFO L403 AbstractCegarLoop]: === Iteration 85 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:55:34,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:55:34,332 INFO L85 PathProgramCache]: Analyzing trace with hash -2026964281, now seen corresponding path program 161 times [2022-03-20 12:55:34,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:55:34,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1439679273] [2022-03-20 12:55:34,333 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:55:34,333 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:55:34,333 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:55:34,334 INFO L85 PathProgramCache]: Analyzing trace with hash -2026964281, now seen corresponding path program 162 times [2022-03-20 12:55:34,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:55:34,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318387985] [2022-03-20 12:55:34,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:55:34,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:55:34,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:55:36,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:55:36,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:55:36,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 581 [2022-03-20 12:55:36,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:55:36,675 INFO L134 CoverageAnalysis]: Checked inductivity of 23493 backedges. 0 proven. 6724 refuted. 0 times theorem prover too weak. 16769 trivial. 0 not checked. [2022-03-20 12:55:36,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:55:36,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318387985] [2022-03-20 12:55:36,675 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318387985] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:55:36,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2006146856] [2022-03-20 12:55:36,675 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 12:55:36,675 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:55:36,676 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:55:36,677 INFO L229 MonitoredProcess]: Starting monitored process 83 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 12:55:36,677 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2022-03-20 12:55:37,363 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 12:55:37,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:55:37,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 12:55:37,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:55:38,260 INFO L134 CoverageAnalysis]: Checked inductivity of 23493 backedges. 325 proven. 1 refuted. 0 times theorem prover too weak. 23167 trivial. 0 not checked. [2022-03-20 12:55:38,261 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:55:38,937 INFO L134 CoverageAnalysis]: Checked inductivity of 23493 backedges. 325 proven. 1 refuted. 0 times theorem prover too weak. 23167 trivial. 0 not checked. [2022-03-20 12:55:38,937 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2006146856] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:55:38,938 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:55:38,938 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 7, 7] total 95 [2022-03-20 12:55:38,938 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:55:38,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1439679273] [2022-03-20 12:55:38,938 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1439679273] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:55:38,938 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:55:38,938 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [87] imperfect sequences [] total 87 [2022-03-20 12:55:38,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931720269] [2022-03-20 12:55:38,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:55:38,939 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2022-03-20 12:55:38,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:55:38,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2022-03-20 12:55:38,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3599, Invalid=5331, Unknown=0, NotChecked=0, Total=8930 [2022-03-20 12:55:38,941 INFO L87 Difference]: Start difference. First operand 1912 states and 2733 transitions. Second operand has 87 states, 87 states have (on average 2.1264367816091956) internal successors, (185), 85 states have internal predecessors, (185), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 12:55:47,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:55:47,477 INFO L93 Difference]: Finished difference Result 3708 states and 5458 transitions. [2022-03-20 12:55:47,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-03-20 12:55:47,478 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 2.1264367816091956) internal successors, (185), 85 states have internal predecessors, (185), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 596 [2022-03-20 12:55:47,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:55:47,481 INFO L225 Difference]: With dead ends: 3708 [2022-03-20 12:55:47,481 INFO L226 Difference]: Without dead ends: 1967 [2022-03-20 12:55:47,489 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1366 GetRequests, 1187 SyntacticMatches, 1 SemanticMatches, 178 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4563 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=10912, Invalid=21308, Unknown=0, NotChecked=0, Total=32220 [2022-03-20 12:55:47,489 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 5067 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 4907 mSolverCounterSat, 2355 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5071 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 7262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2355 IncrementalHoareTripleChecker+Valid, 4907 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-03-20 12:55:47,489 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [5071 Valid, 55 Invalid, 7262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2355 Valid, 4907 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-03-20 12:55:47,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1967 states. [2022-03-20 12:55:48,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1967 to 1935. [2022-03-20 12:55:48,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1935 states, 1678 states have (on average 1.3492252681764005) internal successors, (2264), 1678 states have internal predecessors, (2264), 252 states have call successors, (252), 6 states have call predecessors, (252), 4 states have return successors, (250), 250 states have call predecessors, (250), 250 states have call successors, (250) [2022-03-20 12:55:48,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1935 states to 1935 states and 2766 transitions. [2022-03-20 12:55:48,591 INFO L78 Accepts]: Start accepts. Automaton has 1935 states and 2766 transitions. Word has length 596 [2022-03-20 12:55:48,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:55:48,591 INFO L478 AbstractCegarLoop]: Abstraction has 1935 states and 2766 transitions. [2022-03-20 12:55:48,591 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 87 states have (on average 2.1264367816091956) internal successors, (185), 85 states have internal predecessors, (185), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 12:55:48,592 INFO L276 IsEmpty]: Start isEmpty. Operand 1935 states and 2766 transitions. [2022-03-20 12:55:48,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 604 [2022-03-20 12:55:48,595 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:55:48,595 INFO L499 BasicCegarLoop]: trace histogram [83, 83, 83, 83, 83, 83, 83, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:55:48,615 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Forceful destruction successful, exit code 0 [2022-03-20 12:55:48,798 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable84 [2022-03-20 12:55:48,798 INFO L403 AbstractCegarLoop]: === Iteration 86 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:55:48,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:55:48,798 INFO L85 PathProgramCache]: Analyzing trace with hash 1373874597, now seen corresponding path program 163 times [2022-03-20 12:55:48,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:55:48,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1230595447] [2022-03-20 12:55:48,800 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:55:48,800 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:55:48,800 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:55:48,800 INFO L85 PathProgramCache]: Analyzing trace with hash 1373874597, now seen corresponding path program 164 times [2022-03-20 12:55:48,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:55:48,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807073213] [2022-03-20 12:55:48,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:55:48,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:55:48,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:55:51,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:55:51,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:55:51,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 588 [2022-03-20 12:55:51,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:55:51,140 INFO L134 CoverageAnalysis]: Checked inductivity of 24070 backedges. 0 proven. 6889 refuted. 0 times theorem prover too weak. 17181 trivial. 0 not checked. [2022-03-20 12:55:51,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:55:51,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807073213] [2022-03-20 12:55:51,140 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807073213] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:55:51,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418243628] [2022-03-20 12:55:51,140 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 12:55:51,140 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:55:51,141 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:55:51,142 INFO L229 MonitoredProcess]: Starting monitored process 84 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 12:55:51,142 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2022-03-20 12:55:52,008 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 12:55:52,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:55:52,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 2268 conjuncts, 85 conjunts are in the unsatisfiable core [2022-03-20 12:55:52,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:55:52,731 INFO L134 CoverageAnalysis]: Checked inductivity of 24070 backedges. 0 proven. 6889 refuted. 0 times theorem prover too weak. 17181 trivial. 0 not checked. [2022-03-20 12:55:52,731 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:55:58,807 INFO L134 CoverageAnalysis]: Checked inductivity of 24070 backedges. 0 proven. 6889 refuted. 0 times theorem prover too weak. 17181 trivial. 0 not checked. [2022-03-20 12:55:58,807 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1418243628] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:55:58,807 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:55:58,807 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 86, 86] total 173 [2022-03-20 12:55:58,808 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:55:58,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1230595447] [2022-03-20 12:55:58,808 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1230595447] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:55:58,808 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:55:58,808 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [88] imperfect sequences [] total 88 [2022-03-20 12:55:58,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161708562] [2022-03-20 12:55:58,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:55:58,808 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2022-03-20 12:55:58,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:55:58,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2022-03-20 12:55:58,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14539, Invalid=15217, Unknown=0, NotChecked=0, Total=29756 [2022-03-20 12:55:58,812 INFO L87 Difference]: Start difference. First operand 1935 states and 2766 transitions. Second operand has 88 states, 88 states have (on average 2.125) internal successors, (187), 86 states have internal predecessors, (187), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 12:56:09,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:56:09,768 INFO L93 Difference]: Finished difference Result 3752 states and 5523 transitions. [2022-03-20 12:56:09,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-03-20 12:56:09,769 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 88 states have (on average 2.125) internal successors, (187), 86 states have internal predecessors, (187), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 603 [2022-03-20 12:56:09,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:56:09,772 INFO L225 Difference]: With dead ends: 3752 [2022-03-20 12:56:09,772 INFO L226 Difference]: Without dead ends: 1990 [2022-03-20 12:56:09,776 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1382 GetRequests, 1125 SyntacticMatches, 0 SemanticMatches, 257 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4318 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=29166, Invalid=37656, Unknown=0, NotChecked=0, Total=66822 [2022-03-20 12:56:09,776 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 4463 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 5506 mSolverCounterSat, 2062 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4467 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 7568 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2062 IncrementalHoareTripleChecker+Valid, 5506 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-03-20 12:56:09,776 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [4467 Valid, 61 Invalid, 7568 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2062 Valid, 5506 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-03-20 12:56:09,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1990 states. [2022-03-20 12:56:10,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1990 to 1958. [2022-03-20 12:56:10,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1958 states, 1698 states have (on average 1.3492343934040048) internal successors, (2291), 1698 states have internal predecessors, (2291), 255 states have call successors, (255), 6 states have call predecessors, (255), 4 states have return successors, (253), 253 states have call predecessors, (253), 253 states have call successors, (253) [2022-03-20 12:56:10,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1958 states to 1958 states and 2799 transitions. [2022-03-20 12:56:10,910 INFO L78 Accepts]: Start accepts. Automaton has 1958 states and 2799 transitions. Word has length 603 [2022-03-20 12:56:10,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:56:10,911 INFO L478 AbstractCegarLoop]: Abstraction has 1958 states and 2799 transitions. [2022-03-20 12:56:10,911 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 88 states have (on average 2.125) internal successors, (187), 86 states have internal predecessors, (187), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 12:56:10,911 INFO L276 IsEmpty]: Start isEmpty. Operand 1958 states and 2799 transitions. [2022-03-20 12:56:10,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 611 [2022-03-20 12:56:10,915 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:56:10,915 INFO L499 BasicCegarLoop]: trace histogram [84, 84, 84, 84, 84, 84, 84, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:56:10,937 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Forceful destruction successful, exit code 0 [2022-03-20 12:56:11,120 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:56:11,120 INFO L403 AbstractCegarLoop]: === Iteration 87 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:56:11,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:56:11,121 INFO L85 PathProgramCache]: Analyzing trace with hash -1056044661, now seen corresponding path program 165 times [2022-03-20 12:56:11,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:56:11,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1404950662] [2022-03-20 12:56:11,122 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:56:11,122 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:56:11,122 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:56:11,122 INFO L85 PathProgramCache]: Analyzing trace with hash -1056044661, now seen corresponding path program 166 times [2022-03-20 12:56:11,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:56:11,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485456784] [2022-03-20 12:56:11,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:56:11,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:56:11,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:56:13,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:56:13,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:56:13,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 595 [2022-03-20 12:56:13,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:56:13,345 INFO L134 CoverageAnalysis]: Checked inductivity of 24654 backedges. 0 proven. 7056 refuted. 0 times theorem prover too weak. 17598 trivial. 0 not checked. [2022-03-20 12:56:13,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:56:13,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485456784] [2022-03-20 12:56:13,345 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485456784] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:56:13,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187605159] [2022-03-20 12:56:13,345 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 12:56:13,345 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:56:13,345 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:56:13,346 INFO L229 MonitoredProcess]: Starting monitored process 85 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 12:56:13,347 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2022-03-20 12:56:14,200 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 12:56:14,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:56:14,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 2294 conjuncts, 86 conjunts are in the unsatisfiable core [2022-03-20 12:56:14,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:56:14,972 INFO L134 CoverageAnalysis]: Checked inductivity of 24654 backedges. 0 proven. 17597 refuted. 0 times theorem prover too weak. 7057 trivial. 0 not checked. [2022-03-20 12:56:14,973 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:56:20,236 INFO L134 CoverageAnalysis]: Checked inductivity of 24654 backedges. 0 proven. 17597 refuted. 0 times theorem prover too weak. 7057 trivial. 0 not checked. [2022-03-20 12:56:20,236 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [187605159] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:56:20,237 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:56:20,237 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 87, 87] total 175 [2022-03-20 12:56:20,237 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:56:20,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1404950662] [2022-03-20 12:56:20,237 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1404950662] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:56:20,237 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:56:20,237 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [89] imperfect sequences [] total 89 [2022-03-20 12:56:20,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361953195] [2022-03-20 12:56:20,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:56:20,238 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2022-03-20 12:56:20,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:56:20,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2022-03-20 12:56:20,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14882, Invalid=15568, Unknown=0, NotChecked=0, Total=30450 [2022-03-20 12:56:20,240 INFO L87 Difference]: Start difference. First operand 1958 states and 2799 transitions. Second operand has 89 states, 89 states have (on average 2.1235955056179776) internal successors, (189), 87 states have internal predecessors, (189), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 12:56:31,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:56:31,392 INFO L93 Difference]: Finished difference Result 3796 states and 5588 transitions. [2022-03-20 12:56:31,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-03-20 12:56:31,393 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 2.1235955056179776) internal successors, (189), 87 states have internal predecessors, (189), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 610 [2022-03-20 12:56:31,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:56:31,396 INFO L225 Difference]: With dead ends: 3796 [2022-03-20 12:56:31,396 INFO L226 Difference]: Without dead ends: 2013 [2022-03-20 12:56:31,400 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1398 GetRequests, 1138 SyntacticMatches, 0 SemanticMatches, 260 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4412 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=29853, Invalid=38529, Unknown=0, NotChecked=0, Total=68382 [2022-03-20 12:56:31,400 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 4697 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 5372 mSolverCounterSat, 2193 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4701 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 7565 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2193 IncrementalHoareTripleChecker+Valid, 5372 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-03-20 12:56:31,400 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [4701 Valid, 53 Invalid, 7565 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2193 Valid, 5372 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-03-20 12:56:31,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2013 states. [2022-03-20 12:56:32,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2013 to 1981. [2022-03-20 12:56:32,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1981 states, 1718 states have (on average 1.3492433061699651) internal successors, (2318), 1718 states have internal predecessors, (2318), 258 states have call successors, (258), 6 states have call predecessors, (258), 4 states have return successors, (256), 256 states have call predecessors, (256), 256 states have call successors, (256) [2022-03-20 12:56:32,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1981 states to 1981 states and 2832 transitions. [2022-03-20 12:56:32,586 INFO L78 Accepts]: Start accepts. Automaton has 1981 states and 2832 transitions. Word has length 610 [2022-03-20 12:56:32,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:56:32,586 INFO L478 AbstractCegarLoop]: Abstraction has 1981 states and 2832 transitions. [2022-03-20 12:56:32,586 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 89 states have (on average 2.1235955056179776) internal successors, (189), 87 states have internal predecessors, (189), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 12:56:32,586 INFO L276 IsEmpty]: Start isEmpty. Operand 1981 states and 2832 transitions. [2022-03-20 12:56:32,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 618 [2022-03-20 12:56:32,590 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:56:32,590 INFO L499 BasicCegarLoop]: trace histogram [85, 85, 85, 85, 85, 85, 85, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:56:32,613 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Forceful destruction successful, exit code 0 [2022-03-20 12:56:32,803 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:56:32,803 INFO L403 AbstractCegarLoop]: === Iteration 88 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:56:32,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:56:32,804 INFO L85 PathProgramCache]: Analyzing trace with hash -1848809247, now seen corresponding path program 167 times [2022-03-20 12:56:32,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:56:32,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [54789569] [2022-03-20 12:56:32,805 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:56:32,805 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:56:32,805 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:56:32,805 INFO L85 PathProgramCache]: Analyzing trace with hash -1848809247, now seen corresponding path program 168 times [2022-03-20 12:56:32,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:56:32,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053234341] [2022-03-20 12:56:32,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:56:32,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:56:32,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:56:35,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:56:35,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:56:35,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 602 [2022-03-20 12:56:35,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:56:35,313 INFO L134 CoverageAnalysis]: Checked inductivity of 25245 backedges. 0 proven. 7225 refuted. 0 times theorem prover too weak. 18020 trivial. 0 not checked. [2022-03-20 12:56:35,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:56:35,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053234341] [2022-03-20 12:56:35,314 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053234341] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:56:35,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [252573644] [2022-03-20 12:56:35,314 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 12:56:35,314 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:56:35,314 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:56:35,315 INFO L229 MonitoredProcess]: Starting monitored process 86 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 12:56:35,317 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2022-03-20 12:56:36,074 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 12:56:36,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:56:36,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 12:56:36,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:56:36,918 INFO L134 CoverageAnalysis]: Checked inductivity of 25245 backedges. 337 proven. 1 refuted. 0 times theorem prover too weak. 24907 trivial. 0 not checked. [2022-03-20 12:56:36,918 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:56:37,615 INFO L134 CoverageAnalysis]: Checked inductivity of 25245 backedges. 337 proven. 1 refuted. 0 times theorem prover too weak. 24907 trivial. 0 not checked. [2022-03-20 12:56:37,615 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [252573644] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:56:37,615 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:56:37,615 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [90, 7, 7] total 98 [2022-03-20 12:56:37,615 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:56:37,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [54789569] [2022-03-20 12:56:37,615 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [54789569] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:56:37,616 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:56:37,616 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [90] imperfect sequences [] total 90 [2022-03-20 12:56:37,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465308609] [2022-03-20 12:56:37,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:56:37,616 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2022-03-20 12:56:37,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:56:37,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2022-03-20 12:56:37,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3857, Invalid=5649, Unknown=0, NotChecked=0, Total=9506 [2022-03-20 12:56:37,618 INFO L87 Difference]: Start difference. First operand 1981 states and 2832 transitions. Second operand has 90 states, 90 states have (on average 2.1222222222222222) internal successors, (191), 88 states have internal predecessors, (191), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 12:56:46,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:56:46,867 INFO L93 Difference]: Finished difference Result 3840 states and 5653 transitions. [2022-03-20 12:56:46,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2022-03-20 12:56:46,867 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 2.1222222222222222) internal successors, (191), 88 states have internal predecessors, (191), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 617 [2022-03-20 12:56:46,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:56:46,870 INFO L225 Difference]: With dead ends: 3840 [2022-03-20 12:56:46,870 INFO L226 Difference]: Without dead ends: 2036 [2022-03-20 12:56:46,873 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1414 GetRequests, 1229 SyntacticMatches, 1 SemanticMatches, 184 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4857 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=11692, Invalid=22718, Unknown=0, NotChecked=0, Total=34410 [2022-03-20 12:56:46,873 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 5512 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 5117 mSolverCounterSat, 2627 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5516 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 7744 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2627 IncrementalHoareTripleChecker+Valid, 5117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-03-20 12:56:46,873 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [5516 Valid, 51 Invalid, 7744 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2627 Valid, 5117 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-03-20 12:56:46,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2036 states. [2022-03-20 12:56:48,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2036 to 2004. [2022-03-20 12:56:48,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2004 states, 1738 states have (on average 1.3492520138089759) internal successors, (2345), 1738 states have internal predecessors, (2345), 261 states have call successors, (261), 6 states have call predecessors, (261), 4 states have return successors, (259), 259 states have call predecessors, (259), 259 states have call successors, (259) [2022-03-20 12:56:48,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2004 states to 2004 states and 2865 transitions. [2022-03-20 12:56:48,031 INFO L78 Accepts]: Start accepts. Automaton has 2004 states and 2865 transitions. Word has length 617 [2022-03-20 12:56:48,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:56:48,031 INFO L478 AbstractCegarLoop]: Abstraction has 2004 states and 2865 transitions. [2022-03-20 12:56:48,032 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 90 states have (on average 2.1222222222222222) internal successors, (191), 88 states have internal predecessors, (191), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 12:56:48,032 INFO L276 IsEmpty]: Start isEmpty. Operand 2004 states and 2865 transitions. [2022-03-20 12:56:48,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 625 [2022-03-20 12:56:48,035 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:56:48,036 INFO L499 BasicCegarLoop]: trace histogram [86, 86, 86, 86, 86, 86, 86, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:56:48,055 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Ended with exit code 0 [2022-03-20 12:56:48,248 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2022-03-20 12:56:48,248 INFO L403 AbstractCegarLoop]: === Iteration 89 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:56:48,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:56:48,248 INFO L85 PathProgramCache]: Analyzing trace with hash 1173572687, now seen corresponding path program 169 times [2022-03-20 12:56:48,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:56:48,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1243604223] [2022-03-20 12:56:48,250 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:56:48,250 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:56:48,250 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:56:48,250 INFO L85 PathProgramCache]: Analyzing trace with hash 1173572687, now seen corresponding path program 170 times [2022-03-20 12:56:48,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:56:48,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813635265] [2022-03-20 12:56:48,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:56:48,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:56:48,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:56:50,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:56:50,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:56:50,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 609 [2022-03-20 12:56:50,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:56:50,751 INFO L134 CoverageAnalysis]: Checked inductivity of 25843 backedges. 0 proven. 7396 refuted. 0 times theorem prover too weak. 18447 trivial. 0 not checked. [2022-03-20 12:56:50,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:56:50,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813635265] [2022-03-20 12:56:50,751 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813635265] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:56:50,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [976383699] [2022-03-20 12:56:50,752 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 12:56:50,752 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:56:50,752 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:56:50,753 INFO L229 MonitoredProcess]: Starting monitored process 87 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 12:56:50,754 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2022-03-20 12:56:51,671 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 12:56:51,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:56:51,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 2346 conjuncts, 88 conjunts are in the unsatisfiable core [2022-03-20 12:56:51,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:56:52,243 INFO L134 CoverageAnalysis]: Checked inductivity of 25843 backedges. 0 proven. 7396 refuted. 0 times theorem prover too weak. 18447 trivial. 0 not checked. [2022-03-20 12:56:52,243 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:56:59,254 INFO L134 CoverageAnalysis]: Checked inductivity of 25843 backedges. 0 proven. 7396 refuted. 0 times theorem prover too weak. 18447 trivial. 0 not checked. [2022-03-20 12:56:59,254 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [976383699] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:56:59,254 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:56:59,254 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 89, 89] total 179 [2022-03-20 12:56:59,254 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:56:59,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1243604223] [2022-03-20 12:56:59,255 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1243604223] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:56:59,255 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:56:59,255 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [91] imperfect sequences [] total 91 [2022-03-20 12:56:59,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572483055] [2022-03-20 12:56:59,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:56:59,255 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2022-03-20 12:56:59,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:56:59,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2022-03-20 12:56:59,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15580, Invalid=16282, Unknown=0, NotChecked=0, Total=31862 [2022-03-20 12:56:59,258 INFO L87 Difference]: Start difference. First operand 2004 states and 2865 transitions. Second operand has 91 states, 91 states have (on average 2.120879120879121) internal successors, (193), 89 states have internal predecessors, (193), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 12:57:11,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:57:11,378 INFO L93 Difference]: Finished difference Result 3884 states and 5718 transitions. [2022-03-20 12:57:11,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-03-20 12:57:11,378 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 2.120879120879121) internal successors, (193), 89 states have internal predecessors, (193), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 624 [2022-03-20 12:57:11,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:57:11,381 INFO L225 Difference]: With dead ends: 3884 [2022-03-20 12:57:11,381 INFO L226 Difference]: Without dead ends: 2059 [2022-03-20 12:57:11,385 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1430 GetRequests, 1164 SyntacticMatches, 0 SemanticMatches, 266 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4603 ImplicationChecksByTransitivity, 11.1s TimeCoverageRelationStatistics Valid=31251, Invalid=40305, Unknown=0, NotChecked=0, Total=71556 [2022-03-20 12:57:11,385 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 4979 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 5299 mSolverCounterSat, 2325 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4983 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 7624 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2325 IncrementalHoareTripleChecker+Valid, 5299 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-03-20 12:57:11,385 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [4983 Valid, 57 Invalid, 7624 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2325 Valid, 5299 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-03-20 12:57:11,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2059 states. [2022-03-20 12:57:12,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2059 to 2027. [2022-03-20 12:57:12,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2027 states, 1758 states have (on average 1.3492605233219568) internal successors, (2372), 1758 states have internal predecessors, (2372), 264 states have call successors, (264), 6 states have call predecessors, (264), 4 states have return successors, (262), 262 states have call predecessors, (262), 262 states have call successors, (262) [2022-03-20 12:57:12,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2027 states to 2027 states and 2898 transitions. [2022-03-20 12:57:12,601 INFO L78 Accepts]: Start accepts. Automaton has 2027 states and 2898 transitions. Word has length 624 [2022-03-20 12:57:12,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:57:12,601 INFO L478 AbstractCegarLoop]: Abstraction has 2027 states and 2898 transitions. [2022-03-20 12:57:12,602 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 91 states have (on average 2.120879120879121) internal successors, (193), 89 states have internal predecessors, (193), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 12:57:12,602 INFO L276 IsEmpty]: Start isEmpty. Operand 2027 states and 2898 transitions. [2022-03-20 12:57:12,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 632 [2022-03-20 12:57:12,606 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:57:12,606 INFO L499 BasicCegarLoop]: trace histogram [87, 87, 87, 87, 87, 87, 87, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:57:12,630 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Forceful destruction successful, exit code 0 [2022-03-20 12:57:12,819 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:57:12,819 INFO L403 AbstractCegarLoop]: === Iteration 90 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:57:12,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:57:12,820 INFO L85 PathProgramCache]: Analyzing trace with hash -1529785315, now seen corresponding path program 171 times [2022-03-20 12:57:12,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:57:12,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1864808954] [2022-03-20 12:57:12,821 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:57:12,821 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:57:12,821 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:57:12,821 INFO L85 PathProgramCache]: Analyzing trace with hash -1529785315, now seen corresponding path program 172 times [2022-03-20 12:57:12,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:57:12,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853222182] [2022-03-20 12:57:12,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:57:12,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:57:12,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:57:15,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:57:15,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:57:15,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 616 [2022-03-20 12:57:15,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:57:15,244 INFO L134 CoverageAnalysis]: Checked inductivity of 26448 backedges. 0 proven. 7569 refuted. 0 times theorem prover too weak. 18879 trivial. 0 not checked. [2022-03-20 12:57:15,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:57:15,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853222182] [2022-03-20 12:57:15,244 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853222182] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:57:15,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213058710] [2022-03-20 12:57:15,244 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 12:57:15,244 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:57:15,245 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:57:15,245 INFO L229 MonitoredProcess]: Starting monitored process 88 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 12:57:15,246 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2022-03-20 12:57:16,180 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 12:57:16,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:57:16,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 2372 conjuncts, 89 conjunts are in the unsatisfiable core [2022-03-20 12:57:16,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:57:16,830 INFO L134 CoverageAnalysis]: Checked inductivity of 26448 backedges. 0 proven. 7569 refuted. 0 times theorem prover too weak. 18879 trivial. 0 not checked. [2022-03-20 12:57:16,830 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:57:23,774 INFO L134 CoverageAnalysis]: Checked inductivity of 26448 backedges. 0 proven. 7569 refuted. 0 times theorem prover too weak. 18879 trivial. 0 not checked. [2022-03-20 12:57:23,774 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1213058710] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:57:23,774 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:57:23,775 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [92, 90, 90] total 181 [2022-03-20 12:57:23,775 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:57:23,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1864808954] [2022-03-20 12:57:23,775 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1864808954] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:57:23,775 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:57:23,775 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [92] imperfect sequences [] total 92 [2022-03-20 12:57:23,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781888277] [2022-03-20 12:57:23,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:57:23,776 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2022-03-20 12:57:23,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:57:23,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2022-03-20 12:57:23,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15935, Invalid=16645, Unknown=0, NotChecked=0, Total=32580 [2022-03-20 12:57:23,779 INFO L87 Difference]: Start difference. First operand 2027 states and 2898 transitions. Second operand has 92 states, 92 states have (on average 2.119565217391304) internal successors, (195), 90 states have internal predecessors, (195), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 12:57:36,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:57:36,827 INFO L93 Difference]: Finished difference Result 3928 states and 5783 transitions. [2022-03-20 12:57:36,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-03-20 12:57:36,828 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 2.119565217391304) internal successors, (195), 90 states have internal predecessors, (195), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 631 [2022-03-20 12:57:36,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:57:36,831 INFO L225 Difference]: With dead ends: 3928 [2022-03-20 12:57:36,831 INFO L226 Difference]: Without dead ends: 2082 [2022-03-20 12:57:36,835 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1446 GetRequests, 1177 SyntacticMatches, 0 SemanticMatches, 269 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4700 ImplicationChecksByTransitivity, 11.3s TimeCoverageRelationStatistics Valid=31962, Invalid=41208, Unknown=0, NotChecked=0, Total=73170 [2022-03-20 12:57:36,835 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 5398 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 5105 mSolverCounterSat, 2451 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5402 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 7556 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2451 IncrementalHoareTripleChecker+Valid, 5105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-03-20 12:57:36,835 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [5402 Valid, 51 Invalid, 7556 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2451 Valid, 5105 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-03-20 12:57:36,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2082 states. [2022-03-20 12:57:38,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2082 to 2050. [2022-03-20 12:57:38,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2050 states, 1778 states have (on average 1.3492688413948257) internal successors, (2399), 1778 states have internal predecessors, (2399), 267 states have call successors, (267), 6 states have call predecessors, (267), 4 states have return successors, (265), 265 states have call predecessors, (265), 265 states have call successors, (265) [2022-03-20 12:57:38,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2050 states to 2050 states and 2931 transitions. [2022-03-20 12:57:38,056 INFO L78 Accepts]: Start accepts. Automaton has 2050 states and 2931 transitions. Word has length 631 [2022-03-20 12:57:38,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:57:38,056 INFO L478 AbstractCegarLoop]: Abstraction has 2050 states and 2931 transitions. [2022-03-20 12:57:38,056 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 92 states have (on average 2.119565217391304) internal successors, (195), 90 states have internal predecessors, (195), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 12:57:38,056 INFO L276 IsEmpty]: Start isEmpty. Operand 2050 states and 2931 transitions. [2022-03-20 12:57:38,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 639 [2022-03-20 12:57:38,060 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:57:38,060 INFO L499 BasicCegarLoop]: trace histogram [88, 88, 88, 88, 88, 88, 88, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:57:38,084 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Ended with exit code 0 [2022-03-20 12:57:38,261 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:57:38,262 INFO L403 AbstractCegarLoop]: === Iteration 91 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:57:38,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:57:38,262 INFO L85 PathProgramCache]: Analyzing trace with hash 1832780563, now seen corresponding path program 173 times [2022-03-20 12:57:38,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:57:38,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1697211045] [2022-03-20 12:57:38,263 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:57:38,263 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:57:38,263 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:57:38,263 INFO L85 PathProgramCache]: Analyzing trace with hash 1832780563, now seen corresponding path program 174 times [2022-03-20 12:57:38,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:57:38,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010821413] [2022-03-20 12:57:38,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:57:38,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:57:38,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:57:40,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:57:40,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:57:40,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 623 [2022-03-20 12:57:40,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:57:40,826 INFO L134 CoverageAnalysis]: Checked inductivity of 27060 backedges. 0 proven. 7744 refuted. 0 times theorem prover too weak. 19316 trivial. 0 not checked. [2022-03-20 12:57:40,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:57:40,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010821413] [2022-03-20 12:57:40,826 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010821413] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:57:40,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [458844668] [2022-03-20 12:57:40,827 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 12:57:40,827 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:57:40,827 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:57:40,828 INFO L229 MonitoredProcess]: Starting monitored process 89 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 12:57:40,830 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2022-03-20 12:57:41,607 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 12:57:41,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:57:41,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 12:57:41,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:57:42,555 INFO L134 CoverageAnalysis]: Checked inductivity of 27060 backedges. 349 proven. 1 refuted. 0 times theorem prover too weak. 26710 trivial. 0 not checked. [2022-03-20 12:57:42,556 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:57:43,268 INFO L134 CoverageAnalysis]: Checked inductivity of 27060 backedges. 349 proven. 1 refuted. 0 times theorem prover too weak. 26710 trivial. 0 not checked. [2022-03-20 12:57:43,269 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [458844668] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:57:43,269 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:57:43,269 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 7, 7] total 101 [2022-03-20 12:57:43,269 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:57:43,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1697211045] [2022-03-20 12:57:43,269 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1697211045] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:57:43,269 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:57:43,269 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [93] imperfect sequences [] total 93 [2022-03-20 12:57:43,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17697963] [2022-03-20 12:57:43,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:57:43,270 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2022-03-20 12:57:43,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:57:43,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2022-03-20 12:57:43,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4124, Invalid=5976, Unknown=0, NotChecked=0, Total=10100 [2022-03-20 12:57:43,272 INFO L87 Difference]: Start difference. First operand 2050 states and 2931 transitions. Second operand has 93 states, 93 states have (on average 2.118279569892473) internal successors, (197), 91 states have internal predecessors, (197), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 12:57:53,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:57:53,202 INFO L93 Difference]: Finished difference Result 3972 states and 5848 transitions. [2022-03-20 12:57:53,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2022-03-20 12:57:53,202 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 93 states have (on average 2.118279569892473) internal successors, (197), 91 states have internal predecessors, (197), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 638 [2022-03-20 12:57:53,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:57:53,205 INFO L225 Difference]: With dead ends: 3972 [2022-03-20 12:57:53,205 INFO L226 Difference]: Without dead ends: 2105 [2022-03-20 12:57:53,208 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1462 GetRequests, 1271 SyntacticMatches, 1 SemanticMatches, 190 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5160 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=12499, Invalid=24173, Unknown=0, NotChecked=0, Total=36672 [2022-03-20 12:57:53,208 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 5422 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 5366 mSolverCounterSat, 2625 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5426 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 7991 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2625 IncrementalHoareTripleChecker+Valid, 5366 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-03-20 12:57:53,211 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [5426 Valid, 55 Invalid, 7991 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2625 Valid, 5366 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-03-20 12:57:53,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2105 states. [2022-03-20 12:57:54,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2105 to 2073. [2022-03-20 12:57:54,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2073 states, 1798 states have (on average 1.3492769744160178) internal successors, (2426), 1798 states have internal predecessors, (2426), 270 states have call successors, (270), 6 states have call predecessors, (270), 4 states have return successors, (268), 268 states have call predecessors, (268), 268 states have call successors, (268) [2022-03-20 12:57:54,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2073 states to 2073 states and 2964 transitions. [2022-03-20 12:57:54,783 INFO L78 Accepts]: Start accepts. Automaton has 2073 states and 2964 transitions. Word has length 638 [2022-03-20 12:57:54,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:57:54,783 INFO L478 AbstractCegarLoop]: Abstraction has 2073 states and 2964 transitions. [2022-03-20 12:57:54,784 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 93 states, 93 states have (on average 2.118279569892473) internal successors, (197), 91 states have internal predecessors, (197), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 12:57:54,784 INFO L276 IsEmpty]: Start isEmpty. Operand 2073 states and 2964 transitions. [2022-03-20 12:57:54,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 646 [2022-03-20 12:57:54,788 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:57:54,789 INFO L499 BasicCegarLoop]: trace histogram [89, 89, 89, 89, 89, 89, 89, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:57:54,810 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Ended with exit code 0 [2022-03-20 12:57:54,990 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:57:54,990 INFO L403 AbstractCegarLoop]: === Iteration 92 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:57:54,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:57:54,990 INFO L85 PathProgramCache]: Analyzing trace with hash 399518553, now seen corresponding path program 175 times [2022-03-20 12:57:54,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:57:54,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1892128817] [2022-03-20 12:57:54,991 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:57:54,992 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:57:54,992 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:57:54,992 INFO L85 PathProgramCache]: Analyzing trace with hash 399518553, now seen corresponding path program 176 times [2022-03-20 12:57:54,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:57:54,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888400243] [2022-03-20 12:57:54,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:57:54,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:57:55,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:57:57,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:57:57,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:57:57,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 630 [2022-03-20 12:57:57,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:57:57,615 INFO L134 CoverageAnalysis]: Checked inductivity of 27679 backedges. 0 proven. 7921 refuted. 0 times theorem prover too weak. 19758 trivial. 0 not checked. [2022-03-20 12:57:57,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:57:57,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888400243] [2022-03-20 12:57:57,615 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888400243] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:57:57,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2066951983] [2022-03-20 12:57:57,616 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 12:57:57,616 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:57:57,616 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:57:57,617 INFO L229 MonitoredProcess]: Starting monitored process 90 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 12:57:57,617 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2022-03-20 12:57:58,604 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 12:57:58,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:57:58,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 2424 conjuncts, 91 conjunts are in the unsatisfiable core [2022-03-20 12:57:58,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:57:59,372 INFO L134 CoverageAnalysis]: Checked inductivity of 27679 backedges. 0 proven. 7921 refuted. 0 times theorem prover too weak. 19758 trivial. 0 not checked. [2022-03-20 12:57:59,372 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:58:05,567 INFO L134 CoverageAnalysis]: Checked inductivity of 27679 backedges. 0 proven. 7921 refuted. 0 times theorem prover too weak. 19758 trivial. 0 not checked. [2022-03-20 12:58:05,567 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2066951983] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:58:05,567 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:58:05,568 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [94, 92, 92] total 185 [2022-03-20 12:58:05,568 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:58:05,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1892128817] [2022-03-20 12:58:05,568 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1892128817] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:58:05,568 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:58:05,568 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [94] imperfect sequences [] total 94 [2022-03-20 12:58:05,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397088795] [2022-03-20 12:58:05,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:58:05,568 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2022-03-20 12:58:05,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:58:05,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2022-03-20 12:58:05,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16657, Invalid=17383, Unknown=0, NotChecked=0, Total=34040 [2022-03-20 12:58:05,573 INFO L87 Difference]: Start difference. First operand 2073 states and 2964 transitions. Second operand has 94 states, 94 states have (on average 2.117021276595745) internal successors, (199), 92 states have internal predecessors, (199), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 12:58:18,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:58:18,159 INFO L93 Difference]: Finished difference Result 4016 states and 5913 transitions. [2022-03-20 12:58:18,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-03-20 12:58:18,159 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 94 states have (on average 2.117021276595745) internal successors, (199), 92 states have internal predecessors, (199), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 645 [2022-03-20 12:58:18,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:58:18,162 INFO L225 Difference]: With dead ends: 4016 [2022-03-20 12:58:18,162 INFO L226 Difference]: Without dead ends: 2128 [2022-03-20 12:58:18,166 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1478 GetRequests, 1203 SyntacticMatches, 0 SemanticMatches, 275 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4897 ImplicationChecksByTransitivity, 9.7s TimeCoverageRelationStatistics Valid=33408, Invalid=43044, Unknown=0, NotChecked=0, Total=76452 [2022-03-20 12:58:18,167 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 5077 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 5482 mSolverCounterSat, 2363 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5081 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 7845 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2363 IncrementalHoareTripleChecker+Valid, 5482 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-03-20 12:58:18,167 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [5081 Valid, 51 Invalid, 7845 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2363 Valid, 5482 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-03-20 12:58:18,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2128 states. [2022-03-20 12:58:19,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2128 to 2096. [2022-03-20 12:58:19,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2096 states, 1818 states have (on average 1.3492849284928492) internal successors, (2453), 1818 states have internal predecessors, (2453), 273 states have call successors, (273), 6 states have call predecessors, (273), 4 states have return successors, (271), 271 states have call predecessors, (271), 271 states have call successors, (271) [2022-03-20 12:58:19,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2096 states to 2096 states and 2997 transitions. [2022-03-20 12:58:19,445 INFO L78 Accepts]: Start accepts. Automaton has 2096 states and 2997 transitions. Word has length 645 [2022-03-20 12:58:19,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:58:19,445 INFO L478 AbstractCegarLoop]: Abstraction has 2096 states and 2997 transitions. [2022-03-20 12:58:19,445 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 94 states, 94 states have (on average 2.117021276595745) internal successors, (199), 92 states have internal predecessors, (199), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 12:58:19,445 INFO L276 IsEmpty]: Start isEmpty. Operand 2096 states and 2997 transitions. [2022-03-20 12:58:19,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 653 [2022-03-20 12:58:19,449 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:58:19,449 INFO L499 BasicCegarLoop]: trace histogram [90, 90, 90, 90, 90, 90, 90, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:58:19,474 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Forceful destruction successful, exit code 0 [2022-03-20 12:58:19,671 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable91 [2022-03-20 12:58:19,671 INFO L403 AbstractCegarLoop]: === Iteration 93 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:58:19,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:58:19,672 INFO L85 PathProgramCache]: Analyzing trace with hash 1858956759, now seen corresponding path program 177 times [2022-03-20 12:58:19,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:58:19,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [354686926] [2022-03-20 12:58:19,673 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:58:19,673 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:58:19,673 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:58:19,673 INFO L85 PathProgramCache]: Analyzing trace with hash 1858956759, now seen corresponding path program 178 times [2022-03-20 12:58:19,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:58:19,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928738829] [2022-03-20 12:58:19,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:58:19,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:58:19,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:58:22,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:58:22,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:58:22,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 637 [2022-03-20 12:58:22,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:58:22,393 INFO L134 CoverageAnalysis]: Checked inductivity of 28305 backedges. 0 proven. 8100 refuted. 0 times theorem prover too weak. 20205 trivial. 0 not checked. [2022-03-20 12:58:22,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:58:22,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928738829] [2022-03-20 12:58:22,393 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928738829] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:58:22,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258013011] [2022-03-20 12:58:22,393 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 12:58:22,393 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:58:22,393 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:58:22,394 INFO L229 MonitoredProcess]: Starting monitored process 91 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 12:58:22,395 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2022-03-20 12:58:23,385 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 12:58:23,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:58:23,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 2450 conjuncts, 92 conjunts are in the unsatisfiable core [2022-03-20 12:58:23,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:58:24,316 INFO L134 CoverageAnalysis]: Checked inductivity of 28305 backedges. 0 proven. 20204 refuted. 0 times theorem prover too weak. 8101 trivial. 0 not checked. [2022-03-20 12:58:24,316 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:58:30,685 INFO L134 CoverageAnalysis]: Checked inductivity of 28305 backedges. 0 proven. 20204 refuted. 0 times theorem prover too weak. 8101 trivial. 0 not checked. [2022-03-20 12:58:30,685 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1258013011] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:58:30,685 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:58:30,686 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 93, 93] total 187 [2022-03-20 12:58:30,686 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:58:30,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [354686926] [2022-03-20 12:58:30,686 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [354686926] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:58:30,686 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:58:30,686 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [95] imperfect sequences [] total 95 [2022-03-20 12:58:30,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641633126] [2022-03-20 12:58:30,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:58:30,686 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2022-03-20 12:58:30,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:58:30,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2022-03-20 12:58:30,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17024, Invalid=17758, Unknown=0, NotChecked=0, Total=34782 [2022-03-20 12:58:30,690 INFO L87 Difference]: Start difference. First operand 2096 states and 2997 transitions. Second operand has 95 states, 95 states have (on average 2.1157894736842104) internal successors, (201), 93 states have internal predecessors, (201), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 12:58:43,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:58:43,652 INFO L93 Difference]: Finished difference Result 4060 states and 5978 transitions. [2022-03-20 12:58:43,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-03-20 12:58:43,652 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 95 states have (on average 2.1157894736842104) internal successors, (201), 93 states have internal predecessors, (201), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 652 [2022-03-20 12:58:43,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:58:43,655 INFO L225 Difference]: With dead ends: 4060 [2022-03-20 12:58:43,655 INFO L226 Difference]: Without dead ends: 2151 [2022-03-20 12:58:43,660 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1494 GetRequests, 1216 SyntacticMatches, 0 SemanticMatches, 278 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4997 ImplicationChecksByTransitivity, 10.0s TimeCoverageRelationStatistics Valid=34143, Invalid=43977, Unknown=0, NotChecked=0, Total=78120 [2022-03-20 12:58:43,661 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 4845 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 5500 mSolverCounterSat, 2174 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4849 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 7674 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2174 IncrementalHoareTripleChecker+Valid, 5500 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-03-20 12:58:43,661 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [4849 Valid, 55 Invalid, 7674 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2174 Valid, 5500 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-03-20 12:58:43,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2151 states. [2022-03-20 12:58:44,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2151 to 2119. [2022-03-20 12:58:44,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2119 states, 1838 states have (on average 1.3492927094668117) internal successors, (2480), 1838 states have internal predecessors, (2480), 276 states have call successors, (276), 6 states have call predecessors, (276), 4 states have return successors, (274), 274 states have call predecessors, (274), 274 states have call successors, (274) [2022-03-20 12:58:44,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2119 states to 2119 states and 3030 transitions. [2022-03-20 12:58:44,996 INFO L78 Accepts]: Start accepts. Automaton has 2119 states and 3030 transitions. Word has length 652 [2022-03-20 12:58:44,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:58:44,996 INFO L478 AbstractCegarLoop]: Abstraction has 2119 states and 3030 transitions. [2022-03-20 12:58:44,996 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 95 states, 95 states have (on average 2.1157894736842104) internal successors, (201), 93 states have internal predecessors, (201), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 12:58:44,997 INFO L276 IsEmpty]: Start isEmpty. Operand 2119 states and 3030 transitions. [2022-03-20 12:58:45,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 660 [2022-03-20 12:58:45,001 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:58:45,001 INFO L499 BasicCegarLoop]: trace histogram [91, 91, 91, 91, 91, 91, 91, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:58:45,023 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Forceful destruction successful, exit code 0 [2022-03-20 12:58:45,212 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:58:45,213 INFO L403 AbstractCegarLoop]: === Iteration 94 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:58:45,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:58:45,213 INFO L85 PathProgramCache]: Analyzing trace with hash -987058539, now seen corresponding path program 179 times [2022-03-20 12:58:45,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:58:45,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [993100759] [2022-03-20 12:58:45,214 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:58:45,215 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:58:45,215 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:58:45,215 INFO L85 PathProgramCache]: Analyzing trace with hash -987058539, now seen corresponding path program 180 times [2022-03-20 12:58:45,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:58:45,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754132895] [2022-03-20 12:58:45,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:58:45,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:58:45,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:58:47,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:58:47,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:58:47,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 644 [2022-03-20 12:58:47,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:58:47,939 INFO L134 CoverageAnalysis]: Checked inductivity of 28938 backedges. 0 proven. 8281 refuted. 0 times theorem prover too weak. 20657 trivial. 0 not checked. [2022-03-20 12:58:47,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:58:47,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754132895] [2022-03-20 12:58:47,940 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1754132895] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:58:47,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093393171] [2022-03-20 12:58:47,940 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 12:58:47,940 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:58:47,940 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:58:47,941 INFO L229 MonitoredProcess]: Starting monitored process 92 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 12:58:47,942 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2022-03-20 12:58:48,763 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 12:58:48,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:58:48,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 12:58:48,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:58:49,717 INFO L134 CoverageAnalysis]: Checked inductivity of 28938 backedges. 361 proven. 1 refuted. 0 times theorem prover too weak. 28576 trivial. 0 not checked. [2022-03-20 12:58:49,718 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:58:50,475 INFO L134 CoverageAnalysis]: Checked inductivity of 28938 backedges. 361 proven. 1 refuted. 0 times theorem prover too weak. 28576 trivial. 0 not checked. [2022-03-20 12:58:50,475 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2093393171] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:58:50,475 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:58:50,475 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 7, 7] total 104 [2022-03-20 12:58:50,476 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:58:50,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [993100759] [2022-03-20 12:58:50,476 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [993100759] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:58:50,476 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:58:50,476 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [96] imperfect sequences [] total 96 [2022-03-20 12:58:50,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365773938] [2022-03-20 12:58:50,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:58:50,476 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2022-03-20 12:58:50,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:58:50,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2022-03-20 12:58:50,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4400, Invalid=6312, Unknown=0, NotChecked=0, Total=10712 [2022-03-20 12:58:50,477 INFO L87 Difference]: Start difference. First operand 2119 states and 3030 transitions. Second operand has 96 states, 96 states have (on average 2.1145833333333335) internal successors, (203), 94 states have internal predecessors, (203), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 12:59:01,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:59:01,042 INFO L93 Difference]: Finished difference Result 4104 states and 6043 transitions. [2022-03-20 12:59:01,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2022-03-20 12:59:01,042 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 2.1145833333333335) internal successors, (203), 94 states have internal predecessors, (203), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 659 [2022-03-20 12:59:01,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:59:01,046 INFO L225 Difference]: With dead ends: 4104 [2022-03-20 12:59:01,046 INFO L226 Difference]: Without dead ends: 2174 [2022-03-20 12:59:01,049 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1510 GetRequests, 1313 SyntacticMatches, 1 SemanticMatches, 196 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5472 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=13333, Invalid=25673, Unknown=0, NotChecked=0, Total=39006 [2022-03-20 12:59:01,049 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 5477 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 5332 mSolverCounterSat, 2664 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5481 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 7996 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2664 IncrementalHoareTripleChecker+Valid, 5332 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-03-20 12:59:01,049 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [5481 Valid, 57 Invalid, 7996 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2664 Valid, 5332 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-03-20 12:59:01,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2174 states. [2022-03-20 12:59:02,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2174 to 2142. [2022-03-20 12:59:02,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2142 states, 1858 states have (on average 1.3493003229278795) internal successors, (2507), 1858 states have internal predecessors, (2507), 279 states have call successors, (279), 6 states have call predecessors, (279), 4 states have return successors, (277), 277 states have call predecessors, (277), 277 states have call successors, (277) [2022-03-20 12:59:02,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2142 states to 2142 states and 3063 transitions. [2022-03-20 12:59:02,379 INFO L78 Accepts]: Start accepts. Automaton has 2142 states and 3063 transitions. Word has length 659 [2022-03-20 12:59:02,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:59:02,379 INFO L478 AbstractCegarLoop]: Abstraction has 2142 states and 3063 transitions. [2022-03-20 12:59:02,379 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 2.1145833333333335) internal successors, (203), 94 states have internal predecessors, (203), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 12:59:02,379 INFO L276 IsEmpty]: Start isEmpty. Operand 2142 states and 3063 transitions. [2022-03-20 12:59:02,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 667 [2022-03-20 12:59:02,383 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:59:02,385 INFO L499 BasicCegarLoop]: trace histogram [92, 92, 92, 92, 92, 92, 92, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:59:02,406 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Forceful destruction successful, exit code 0 [2022-03-20 12:59:02,600 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:59:02,601 INFO L403 AbstractCegarLoop]: === Iteration 95 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:59:02,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:59:02,601 INFO L85 PathProgramCache]: Analyzing trace with hash 117492891, now seen corresponding path program 181 times [2022-03-20 12:59:02,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:59:02,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1550630753] [2022-03-20 12:59:02,602 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:59:02,602 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:59:02,602 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:59:02,602 INFO L85 PathProgramCache]: Analyzing trace with hash 117492891, now seen corresponding path program 182 times [2022-03-20 12:59:02,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:59:02,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788047113] [2022-03-20 12:59:02,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:59:02,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:59:02,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:59:04,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:59:04,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:59:04,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 651 [2022-03-20 12:59:04,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:59:04,761 INFO L134 CoverageAnalysis]: Checked inductivity of 29578 backedges. 0 proven. 8464 refuted. 0 times theorem prover too weak. 21114 trivial. 0 not checked. [2022-03-20 12:59:04,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:59:04,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788047113] [2022-03-20 12:59:04,764 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788047113] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:59:04,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472877484] [2022-03-20 12:59:04,764 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 12:59:04,764 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:59:04,764 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:59:04,765 INFO L229 MonitoredProcess]: Starting monitored process 93 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 12:59:04,766 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2022-03-20 12:59:05,845 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 12:59:05,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:59:05,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 2502 conjuncts, 94 conjunts are in the unsatisfiable core [2022-03-20 12:59:05,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:59:06,555 INFO L134 CoverageAnalysis]: Checked inductivity of 29578 backedges. 0 proven. 8464 refuted. 0 times theorem prover too weak. 21114 trivial. 0 not checked. [2022-03-20 12:59:06,556 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:59:13,001 INFO L134 CoverageAnalysis]: Checked inductivity of 29578 backedges. 0 proven. 8464 refuted. 0 times theorem prover too weak. 21114 trivial. 0 not checked. [2022-03-20 12:59:13,001 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1472877484] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:59:13,001 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:59:13,001 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 95, 95] total 191 [2022-03-20 12:59:13,001 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:59:13,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1550630753] [2022-03-20 12:59:13,001 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1550630753] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:59:13,001 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:59:13,002 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [97] imperfect sequences [] total 97 [2022-03-20 12:59:13,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618501861] [2022-03-20 12:59:13,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:59:13,002 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2022-03-20 12:59:13,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:59:13,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2022-03-20 12:59:13,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17770, Invalid=18520, Unknown=0, NotChecked=0, Total=36290 [2022-03-20 12:59:13,005 INFO L87 Difference]: Start difference. First operand 2142 states and 3063 transitions. Second operand has 97 states, 97 states have (on average 2.11340206185567) internal successors, (205), 95 states have internal predecessors, (205), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 12:59:27,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:59:27,047 INFO L93 Difference]: Finished difference Result 4148 states and 6108 transitions. [2022-03-20 12:59:27,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2022-03-20 12:59:27,064 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 2.11340206185567) internal successors, (205), 95 states have internal predecessors, (205), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 666 [2022-03-20 12:59:27,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:59:27,067 INFO L225 Difference]: With dead ends: 4148 [2022-03-20 12:59:27,067 INFO L226 Difference]: Without dead ends: 2197 [2022-03-20 12:59:27,071 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1526 GetRequests, 1242 SyntacticMatches, 0 SemanticMatches, 284 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5200 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=35637, Invalid=45873, Unknown=0, NotChecked=0, Total=81510 [2022-03-20 12:59:27,072 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 5668 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 5474 mSolverCounterSat, 2797 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5672 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 8271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2797 IncrementalHoareTripleChecker+Valid, 5474 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-03-20 12:59:27,072 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [5672 Valid, 63 Invalid, 8271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2797 Valid, 5474 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-03-20 12:59:27,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2197 states. [2022-03-20 12:59:28,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2197 to 2165. [2022-03-20 12:59:28,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2165 states, 1878 states have (on average 1.349307774227902) internal successors, (2534), 1878 states have internal predecessors, (2534), 282 states have call successors, (282), 6 states have call predecessors, (282), 4 states have return successors, (280), 280 states have call predecessors, (280), 280 states have call successors, (280) [2022-03-20 12:59:28,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2165 states to 2165 states and 3096 transitions. [2022-03-20 12:59:28,456 INFO L78 Accepts]: Start accepts. Automaton has 2165 states and 3096 transitions. Word has length 666 [2022-03-20 12:59:28,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:59:28,456 INFO L478 AbstractCegarLoop]: Abstraction has 2165 states and 3096 transitions. [2022-03-20 12:59:28,456 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 2.11340206185567) internal successors, (205), 95 states have internal predecessors, (205), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 12:59:28,456 INFO L276 IsEmpty]: Start isEmpty. Operand 2165 states and 3096 transitions. [2022-03-20 12:59:28,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 674 [2022-03-20 12:59:28,460 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:59:28,461 INFO L499 BasicCegarLoop]: trace histogram [93, 93, 93, 93, 93, 93, 93, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:59:28,484 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Forceful destruction successful, exit code 0 [2022-03-20 12:59:28,675 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:59:28,675 INFO L403 AbstractCegarLoop]: === Iteration 96 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:59:28,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:59:28,676 INFO L85 PathProgramCache]: Analyzing trace with hash 817995217, now seen corresponding path program 183 times [2022-03-20 12:59:28,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:59:28,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [585089031] [2022-03-20 12:59:28,677 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:59:28,677 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:59:28,677 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:59:28,677 INFO L85 PathProgramCache]: Analyzing trace with hash 817995217, now seen corresponding path program 184 times [2022-03-20 12:59:28,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:59:28,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365240670] [2022-03-20 12:59:28,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:59:28,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:59:28,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:59:30,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:59:30,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:59:31,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 658 [2022-03-20 12:59:31,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:59:31,021 INFO L134 CoverageAnalysis]: Checked inductivity of 30225 backedges. 0 proven. 8649 refuted. 0 times theorem prover too weak. 21576 trivial. 0 not checked. [2022-03-20 12:59:31,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:59:31,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365240670] [2022-03-20 12:59:31,021 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365240670] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:59:31,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467431274] [2022-03-20 12:59:31,021 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 12:59:31,022 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:59:31,022 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:59:31,023 INFO L229 MonitoredProcess]: Starting monitored process 94 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 12:59:31,024 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2022-03-20 12:59:32,129 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 12:59:32,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:59:32,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 2528 conjuncts, 95 conjunts are in the unsatisfiable core [2022-03-20 12:59:32,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:59:32,868 INFO L134 CoverageAnalysis]: Checked inductivity of 30225 backedges. 0 proven. 8649 refuted. 0 times theorem prover too weak. 21576 trivial. 0 not checked. [2022-03-20 12:59:32,868 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:59:41,184 INFO L134 CoverageAnalysis]: Checked inductivity of 30225 backedges. 0 proven. 8649 refuted. 0 times theorem prover too weak. 21576 trivial. 0 not checked. [2022-03-20 12:59:41,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [467431274] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:59:41,185 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:59:41,185 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [98, 96, 96] total 193 [2022-03-20 12:59:41,185 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:59:41,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [585089031] [2022-03-20 12:59:41,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [585089031] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:59:41,185 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:59:41,185 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [98] imperfect sequences [] total 98 [2022-03-20 12:59:41,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035791248] [2022-03-20 12:59:41,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:59:41,186 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2022-03-20 12:59:41,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:59:41,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2022-03-20 12:59:41,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18149, Invalid=18907, Unknown=0, NotChecked=0, Total=37056 [2022-03-20 12:59:41,189 INFO L87 Difference]: Start difference. First operand 2165 states and 3096 transitions. Second operand has 98 states, 98 states have (on average 2.1122448979591835) internal successors, (207), 96 states have internal predecessors, (207), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 12:59:57,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:59:57,664 INFO L93 Difference]: Finished difference Result 4192 states and 6173 transitions. [2022-03-20 12:59:57,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-03-20 12:59:57,665 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 2.1122448979591835) internal successors, (207), 96 states have internal predecessors, (207), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 673 [2022-03-20 12:59:57,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:59:57,668 INFO L225 Difference]: With dead ends: 4192 [2022-03-20 12:59:57,668 INFO L226 Difference]: Without dead ends: 2220 [2022-03-20 12:59:57,672 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1542 GetRequests, 1255 SyntacticMatches, 0 SemanticMatches, 287 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5303 ImplicationChecksByTransitivity, 12.2s TimeCoverageRelationStatistics Valid=36396, Invalid=46836, Unknown=0, NotChecked=0, Total=83232 [2022-03-20 12:59:57,673 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 6763 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 4983 mSolverCounterSat, 3521 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6767 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 8504 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3521 IncrementalHoareTripleChecker+Valid, 4983 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-03-20 12:59:57,673 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [6767 Valid, 47 Invalid, 8504 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3521 Valid, 4983 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-03-20 12:59:57,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2220 states. [2022-03-20 12:59:59,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2220 to 2188. [2022-03-20 12:59:59,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2188 states, 1898 states have (on average 1.3493150684931507) internal successors, (2561), 1898 states have internal predecessors, (2561), 285 states have call successors, (285), 6 states have call predecessors, (285), 4 states have return successors, (283), 283 states have call predecessors, (283), 283 states have call successors, (283) [2022-03-20 12:59:59,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2188 states to 2188 states and 3129 transitions. [2022-03-20 12:59:59,062 INFO L78 Accepts]: Start accepts. Automaton has 2188 states and 3129 transitions. Word has length 673 [2022-03-20 12:59:59,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:59:59,062 INFO L478 AbstractCegarLoop]: Abstraction has 2188 states and 3129 transitions. [2022-03-20 12:59:59,062 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 2.1122448979591835) internal successors, (207), 96 states have internal predecessors, (207), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 12:59:59,063 INFO L276 IsEmpty]: Start isEmpty. Operand 2188 states and 3129 transitions. [2022-03-20 12:59:59,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 681 [2022-03-20 12:59:59,067 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:59:59,067 INFO L499 BasicCegarLoop]: trace histogram [94, 94, 94, 94, 94, 94, 94, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:59:59,090 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Ended with exit code 0 [2022-03-20 12:59:59,271 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:59:59,272 INFO L403 AbstractCegarLoop]: === Iteration 97 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:59:59,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:59:59,272 INFO L85 PathProgramCache]: Analyzing trace with hash 448225119, now seen corresponding path program 185 times [2022-03-20 12:59:59,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:59:59,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [366610955] [2022-03-20 12:59:59,273 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:59:59,273 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:59:59,274 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:59:59,274 INFO L85 PathProgramCache]: Analyzing trace with hash 448225119, now seen corresponding path program 186 times [2022-03-20 12:59:59,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:59:59,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663237575] [2022-03-20 12:59:59,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:59:59,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:59:59,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:00:02,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:00:02,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:00:02,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 665 [2022-03-20 13:00:02,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:00:02,241 INFO L134 CoverageAnalysis]: Checked inductivity of 30879 backedges. 0 proven. 8836 refuted. 0 times theorem prover too weak. 22043 trivial. 0 not checked. [2022-03-20 13:00:02,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:00:02,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663237575] [2022-03-20 13:00:02,241 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663237575] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:00:02,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999319988] [2022-03-20 13:00:02,241 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 13:00:02,241 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:00:02,241 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:00:02,242 INFO L229 MonitoredProcess]: Starting monitored process 95 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:00:02,243 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2022-03-20 13:00:03,164 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 13:00:03,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:00:03,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 13:00:03,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:00:03,909 INFO L134 CoverageAnalysis]: Checked inductivity of 30879 backedges. 373 proven. 1 refuted. 0 times theorem prover too weak. 30505 trivial. 0 not checked. [2022-03-20 13:00:03,909 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:00:04,548 INFO L134 CoverageAnalysis]: Checked inductivity of 30879 backedges. 373 proven. 1 refuted. 0 times theorem prover too weak. 30505 trivial. 0 not checked. [2022-03-20 13:00:04,548 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [999319988] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:00:04,548 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:00:04,548 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 7, 7] total 107 [2022-03-20 13:00:04,548 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:00:04,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [366610955] [2022-03-20 13:00:04,549 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [366610955] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:00:04,549 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:00:04,549 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [99] imperfect sequences [] total 99 [2022-03-20 13:00:04,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710708274] [2022-03-20 13:00:04,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:00:04,549 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2022-03-20 13:00:04,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:00:04,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2022-03-20 13:00:04,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4685, Invalid=6657, Unknown=0, NotChecked=0, Total=11342 [2022-03-20 13:00:04,552 INFO L87 Difference]: Start difference. First operand 2188 states and 3129 transitions. Second operand has 99 states, 99 states have (on average 2.111111111111111) internal successors, (209), 97 states have internal predecessors, (209), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 13:00:16,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:00:16,615 INFO L93 Difference]: Finished difference Result 4236 states and 6238 transitions. [2022-03-20 13:00:16,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2022-03-20 13:00:16,615 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 2.111111111111111) internal successors, (209), 97 states have internal predecessors, (209), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 680 [2022-03-20 13:00:16,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:00:16,619 INFO L225 Difference]: With dead ends: 4236 [2022-03-20 13:00:16,619 INFO L226 Difference]: Without dead ends: 2243 [2022-03-20 13:00:16,623 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1558 GetRequests, 1355 SyntacticMatches, 1 SemanticMatches, 202 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5793 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=14194, Invalid=27218, Unknown=0, NotChecked=0, Total=41412 [2022-03-20 13:00:16,623 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 5817 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 5790 mSolverCounterSat, 2729 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5821 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 8519 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2729 IncrementalHoareTripleChecker+Valid, 5790 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-03-20 13:00:16,623 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [5821 Valid, 61 Invalid, 8519 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2729 Valid, 5790 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2022-03-20 13:00:16,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2243 states. [2022-03-20 13:00:18,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2243 to 2211. [2022-03-20 13:00:18,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2211 states, 1918 states have (on average 1.3493222106360792) internal successors, (2588), 1918 states have internal predecessors, (2588), 288 states have call successors, (288), 6 states have call predecessors, (288), 4 states have return successors, (286), 286 states have call predecessors, (286), 286 states have call successors, (286) [2022-03-20 13:00:18,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2211 states to 2211 states and 3162 transitions. [2022-03-20 13:00:18,183 INFO L78 Accepts]: Start accepts. Automaton has 2211 states and 3162 transitions. Word has length 680 [2022-03-20 13:00:18,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:00:18,183 INFO L478 AbstractCegarLoop]: Abstraction has 2211 states and 3162 transitions. [2022-03-20 13:00:18,183 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 99 states have (on average 2.111111111111111) internal successors, (209), 97 states have internal predecessors, (209), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 13:00:18,183 INFO L276 IsEmpty]: Start isEmpty. Operand 2211 states and 3162 transitions. [2022-03-20 13:00:18,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 688 [2022-03-20 13:00:18,197 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:00:18,197 INFO L499 BasicCegarLoop]: trace histogram [95, 95, 95, 95, 95, 95, 95, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:00:18,222 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Ended with exit code 0 [2022-03-20 13:00:18,418 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2022-03-20 13:00:18,418 INFO L403 AbstractCegarLoop]: === Iteration 98 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:00:18,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:00:18,418 INFO L85 PathProgramCache]: Analyzing trace with hash -470435571, now seen corresponding path program 187 times [2022-03-20 13:00:18,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:00:18,419 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2087847457] [2022-03-20 13:00:18,421 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:00:18,421 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 13:00:18,421 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 13:00:18,421 INFO L85 PathProgramCache]: Analyzing trace with hash -470435571, now seen corresponding path program 188 times [2022-03-20 13:00:18,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:00:18,421 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385034544] [2022-03-20 13:00:18,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:00:18,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:00:18,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:00:21,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:00:21,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:00:21,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 672 [2022-03-20 13:00:21,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:00:21,068 INFO L134 CoverageAnalysis]: Checked inductivity of 31540 backedges. 0 proven. 9025 refuted. 0 times theorem prover too weak. 22515 trivial. 0 not checked. [2022-03-20 13:00:21,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:00:21,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385034544] [2022-03-20 13:00:21,069 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385034544] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:00:21,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [403320247] [2022-03-20 13:00:21,069 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 13:00:21,069 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:00:21,069 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:00:21,070 INFO L229 MonitoredProcess]: Starting monitored process 96 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:00:21,071 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2022-03-20 13:00:22,198 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 13:00:22,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:00:22,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 2580 conjuncts, 97 conjunts are in the unsatisfiable core [2022-03-20 13:00:22,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:00:23,004 INFO L134 CoverageAnalysis]: Checked inductivity of 31540 backedges. 0 proven. 9025 refuted. 0 times theorem prover too weak. 22515 trivial. 0 not checked. [2022-03-20 13:00:23,004 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:00:32,039 INFO L134 CoverageAnalysis]: Checked inductivity of 31540 backedges. 0 proven. 9025 refuted. 0 times theorem prover too weak. 22515 trivial. 0 not checked. [2022-03-20 13:00:32,039 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [403320247] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:00:32,039 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:00:32,040 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 98, 98] total 197 [2022-03-20 13:00:32,040 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:00:32,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2087847457] [2022-03-20 13:00:32,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2087847457] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:00:32,040 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:00:32,040 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [100] imperfect sequences [] total 100 [2022-03-20 13:00:32,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161150164] [2022-03-20 13:00:32,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:00:32,041 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 100 states [2022-03-20 13:00:32,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:00:32,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2022-03-20 13:00:32,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18919, Invalid=19693, Unknown=0, NotChecked=0, Total=38612 [2022-03-20 13:00:32,046 INFO L87 Difference]: Start difference. First operand 2211 states and 3162 transitions. Second operand has 100 states, 100 states have (on average 2.11) internal successors, (211), 98 states have internal predecessors, (211), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2)