/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-5d317bd [2022-03-19 02:20:12,056 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-19 02:20:12,059 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-19 02:20:12,103 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-19 02:20:12,103 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-19 02:20:12,105 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-19 02:20:12,107 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-19 02:20:12,110 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-19 02:20:12,112 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-19 02:20:12,116 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-19 02:20:12,117 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-19 02:20:12,118 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-19 02:20:12,118 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-19 02:20:12,120 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-19 02:20:12,121 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-19 02:20:12,122 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-19 02:20:12,123 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-19 02:20:12,124 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-19 02:20:12,128 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-19 02:20:12,133 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-19 02:20:12,134 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-19 02:20:12,135 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-19 02:20:12,136 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-19 02:20:12,137 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-19 02:20:12,138 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-19 02:20:12,144 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-19 02:20:12,151 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-19 02:20:12,152 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-19 02:20:12,153 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-19 02:20:12,154 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2022-03-19 02:20:12,162 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-19 02:20:12,162 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-19 02:20:12,163 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-19 02:20:12,163 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-19 02:20:12,163 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-19 02:20:12,163 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-19 02:20:12,164 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-19 02:20:12,164 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-19 02:20:12,164 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-19 02:20:12,164 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-19 02:20:12,165 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-19 02:20:12,165 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-19 02:20:12,165 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-19 02:20:12,165 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-19 02:20:12,165 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-19 02:20:12,165 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-19 02:20:12,166 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-19 02:20:12,166 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-19 02:20:12,166 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-19 02:20:12,166 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-19 02:20:12,166 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-19 02:20:12,166 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-19 02:20:12,166 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-19 02:20:12,167 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-19 02:20:12,167 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-03-19 02:20:12,167 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-19 02:20:12,379 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-19 02:20:12,406 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-19 02:20:12,409 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-19 02:20:12,409 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-19 02:20:12,411 INFO L275 PluginConnector]: CDTParser initialized [2022-03-19 02:20:12,412 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/n.c24.i [2022-03-19 02:20:12,463 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bb9384918/df9733cdde79481794453c24977bc511/FLAGcb4eeade3 [2022-03-19 02:20:12,849 INFO L306 CDTParser]: Found 1 translation units. [2022-03-19 02:20:12,849 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/n.c24.i [2022-03-19 02:20:12,856 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bb9384918/df9733cdde79481794453c24977bc511/FLAGcb4eeade3 [2022-03-19 02:20:13,236 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bb9384918/df9733cdde79481794453c24977bc511 [2022-03-19 02:20:13,239 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-19 02:20:13,241 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-19 02:20:13,243 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-19 02:20:13,243 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-19 02:20:13,246 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-19 02:20:13,246 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.03 02:20:13" (1/1) ... [2022-03-19 02:20:13,247 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1db3df04 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 02:20:13, skipping insertion in model container [2022-03-19 02:20:13,248 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.03 02:20:13" (1/1) ... [2022-03-19 02:20:13,253 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-19 02:20:13,270 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-19 02:20:13,414 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] [2022-03-19 02:20:13,478 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-19 02:20:13,495 INFO L203 MainTranslator]: Completed pre-run [2022-03-19 02:20:13,504 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] [2022-03-19 02:20:13,519 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-19 02:20:13,534 INFO L208 MainTranslator]: Completed translation [2022-03-19 02:20:13,535 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 02:20:13 WrapperNode [2022-03-19 02:20:13,535 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-19 02:20:13,536 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-19 02:20:13,536 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-19 02:20:13,536 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-19 02:20:13,545 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 02:20:13" (1/1) ... [2022-03-19 02:20:13,545 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 02:20:13" (1/1) ... [2022-03-19 02:20:13,559 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 02:20:13" (1/1) ... [2022-03-19 02:20:13,560 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 02:20:13" (1/1) ... [2022-03-19 02:20:13,571 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 02:20:13" (1/1) ... [2022-03-19 02:20:13,583 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 02:20:13" (1/1) ... [2022-03-19 02:20:13,585 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 02:20:13" (1/1) ... [2022-03-19 02:20:13,588 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-19 02:20:13,588 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-19 02:20:13,588 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-19 02:20:13,589 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-19 02:20:13,590 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 02:20:13" (1/1) ... [2022-03-19 02:20:13,596 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-19 02:20:13,606 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:20:13,617 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) [2022-03-19 02:20:13,623 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 [2022-03-19 02:20:13,646 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-19 02:20:13,647 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-19 02:20:13,648 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-19 02:20:13,648 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-19 02:20:13,648 INFO L138 BoogieDeclarations]: Found implementation of procedure bar [2022-03-19 02:20:13,648 INFO L138 BoogieDeclarations]: Found implementation of procedure foo [2022-03-19 02:20:13,648 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-19 02:20:13,648 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memmove [2022-03-19 02:20:13,648 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-19 02:20:13,648 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-19 02:20:13,648 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-03-19 02:20:13,649 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-03-19 02:20:13,649 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-19 02:20:13,649 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-19 02:20:13,649 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-19 02:20:13,649 INFO L130 BoogieDeclarations]: Found specification of procedure memcpy [2022-03-19 02:20:13,649 INFO L130 BoogieDeclarations]: Found specification of procedure memmove [2022-03-19 02:20:13,649 INFO L130 BoogieDeclarations]: Found specification of procedure memccpy [2022-03-19 02:20:13,649 INFO L130 BoogieDeclarations]: Found specification of procedure memset [2022-03-19 02:20:13,649 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2022-03-19 02:20:13,650 INFO L130 BoogieDeclarations]: Found specification of procedure memchr [2022-03-19 02:20:13,650 INFO L130 BoogieDeclarations]: Found specification of procedure strcpy [2022-03-19 02:20:13,650 INFO L130 BoogieDeclarations]: Found specification of procedure strncpy [2022-03-19 02:20:13,650 INFO L130 BoogieDeclarations]: Found specification of procedure strcat [2022-03-19 02:20:13,650 INFO L130 BoogieDeclarations]: Found specification of procedure strncat [2022-03-19 02:20:13,650 INFO L130 BoogieDeclarations]: Found specification of procedure strcmp [2022-03-19 02:20:13,650 INFO L130 BoogieDeclarations]: Found specification of procedure strncmp [2022-03-19 02:20:13,650 INFO L130 BoogieDeclarations]: Found specification of procedure strcoll [2022-03-19 02:20:13,650 INFO L130 BoogieDeclarations]: Found specification of procedure strxfrm [2022-03-19 02:20:13,650 INFO L130 BoogieDeclarations]: Found specification of procedure strcoll_l [2022-03-19 02:20:13,651 INFO L130 BoogieDeclarations]: Found specification of procedure strxfrm_l [2022-03-19 02:20:13,651 INFO L130 BoogieDeclarations]: Found specification of procedure strdup [2022-03-19 02:20:13,651 INFO L130 BoogieDeclarations]: Found specification of procedure strndup [2022-03-19 02:20:13,651 INFO L130 BoogieDeclarations]: Found specification of procedure strchr [2022-03-19 02:20:13,651 INFO L130 BoogieDeclarations]: Found specification of procedure strrchr [2022-03-19 02:20:13,651 INFO L130 BoogieDeclarations]: Found specification of procedure strcspn [2022-03-19 02:20:13,651 INFO L130 BoogieDeclarations]: Found specification of procedure strspn [2022-03-19 02:20:13,651 INFO L130 BoogieDeclarations]: Found specification of procedure strpbrk [2022-03-19 02:20:13,655 INFO L130 BoogieDeclarations]: Found specification of procedure strstr [2022-03-19 02:20:13,655 INFO L130 BoogieDeclarations]: Found specification of procedure strtok [2022-03-19 02:20:13,655 INFO L130 BoogieDeclarations]: Found specification of procedure __strtok_r [2022-03-19 02:20:13,655 INFO L130 BoogieDeclarations]: Found specification of procedure strtok_r [2022-03-19 02:20:13,656 INFO L130 BoogieDeclarations]: Found specification of procedure strlen [2022-03-19 02:20:13,656 INFO L130 BoogieDeclarations]: Found specification of procedure strnlen [2022-03-19 02:20:13,656 INFO L130 BoogieDeclarations]: Found specification of procedure strerror [2022-03-19 02:20:13,656 INFO L130 BoogieDeclarations]: Found specification of procedure strerror_r [2022-03-19 02:20:13,656 INFO L130 BoogieDeclarations]: Found specification of procedure strerror_l [2022-03-19 02:20:13,656 INFO L130 BoogieDeclarations]: Found specification of procedure __bzero [2022-03-19 02:20:13,656 INFO L130 BoogieDeclarations]: Found specification of procedure bcopy [2022-03-19 02:20:13,656 INFO L130 BoogieDeclarations]: Found specification of procedure bzero [2022-03-19 02:20:13,657 INFO L130 BoogieDeclarations]: Found specification of procedure bcmp [2022-03-19 02:20:13,657 INFO L130 BoogieDeclarations]: Found specification of procedure index [2022-03-19 02:20:13,657 INFO L130 BoogieDeclarations]: Found specification of procedure rindex [2022-03-19 02:20:13,657 INFO L130 BoogieDeclarations]: Found specification of procedure ffs [2022-03-19 02:20:13,657 INFO L130 BoogieDeclarations]: Found specification of procedure strcasecmp [2022-03-19 02:20:13,657 INFO L130 BoogieDeclarations]: Found specification of procedure strncasecmp [2022-03-19 02:20:13,657 INFO L130 BoogieDeclarations]: Found specification of procedure strsep [2022-03-19 02:20:13,657 INFO L130 BoogieDeclarations]: Found specification of procedure strsignal [2022-03-19 02:20:13,658 INFO L130 BoogieDeclarations]: Found specification of procedure __stpcpy [2022-03-19 02:20:13,658 INFO L130 BoogieDeclarations]: Found specification of procedure stpcpy [2022-03-19 02:20:13,658 INFO L130 BoogieDeclarations]: Found specification of procedure __stpncpy [2022-03-19 02:20:13,658 INFO L130 BoogieDeclarations]: Found specification of procedure stpncpy [2022-03-19 02:20:13,658 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-19 02:20:13,658 INFO L130 BoogieDeclarations]: Found specification of procedure bar [2022-03-19 02:20:13,658 INFO L130 BoogieDeclarations]: Found specification of procedure foo [2022-03-19 02:20:13,658 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-19 02:20:13,659 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-19 02:20:13,659 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-19 02:20:13,659 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-03-19 02:20:13,659 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memmove [2022-03-19 02:20:13,659 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-19 02:20:13,659 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-19 02:20:13,659 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-19 02:20:13,659 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-19 02:20:13,659 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2022-03-19 02:20:13,660 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2022-03-19 02:20:13,805 INFO L234 CfgBuilder]: Building ICFG [2022-03-19 02:20:13,807 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-19 02:20:13,993 INFO L275 CfgBuilder]: Performing block encoding [2022-03-19 02:20:13,999 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-19 02:20:14,000 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2022-03-19 02:20:14,001 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 02:20:14 BoogieIcfgContainer [2022-03-19 02:20:14,001 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-19 02:20:14,003 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-19 02:20:14,003 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-19 02:20:14,010 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-19 02:20:14,011 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.03 02:20:13" (1/3) ... [2022-03-19 02:20:14,011 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b6d5304 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.03 02:20:14, skipping insertion in model container [2022-03-19 02:20:14,011 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 02:20:13" (2/3) ... [2022-03-19 02:20:14,012 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b6d5304 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.03 02:20:14, skipping insertion in model container [2022-03-19 02:20:14,012 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 02:20:14" (3/3) ... [2022-03-19 02:20:14,013 INFO L111 eAbstractionObserver]: Analyzing ICFG n.c24.i [2022-03-19 02:20:14,017 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-19 02:20:14,017 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-19 02:20:14,049 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-19 02:20:14,054 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 [2022-03-19 02:20:14,054 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-19 02:20:14,068 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) [2022-03-19 02:20:14,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-03-19 02:20:14,075 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:20:14,075 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:20:14,076 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:20:14,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:20:14,080 INFO L85 PathProgramCache]: Analyzing trace with hash -29354929, now seen corresponding path program 1 times [2022-03-19 02:20:14,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:20:14,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1554473212] [2022-03-19 02:20:14,097 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 02:20:14,098 INFO L85 PathProgramCache]: Analyzing trace with hash -29354929, now seen corresponding path program 2 times [2022-03-19 02:20:14,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:20:14,106 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732346716] [2022-03-19 02:20:14,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:20:14,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:20:14,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:20:14,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:20:14,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:20:14,285 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:20:14,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:20:14,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732346716] [2022-03-19 02:20:14,286 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732346716] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:20:14,286 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:20:14,286 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-19 02:20:14,289 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:20:14,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1554473212] [2022-03-19 02:20:14,290 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1554473212] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:20:14,290 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:20:14,290 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-19 02:20:14,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900196419] [2022-03-19 02:20:14,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:20:14,294 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-19 02:20:14,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:20:14,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-19 02:20:14,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-19 02:20:14,322 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) [2022-03-19 02:20:14,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:20:14,389 INFO L93 Difference]: Finished difference Result 98 states and 133 transitions. [2022-03-19 02:20:14,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-19 02:20:14,394 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 [2022-03-19 02:20:14,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:20:14,403 INFO L225 Difference]: With dead ends: 98 [2022-03-19 02:20:14,403 INFO L226 Difference]: Without dead ends: 46 [2022-03-19 02:20:14,406 INFO L911 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 [2022-03-19 02:20:14,413 INFO L912 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 [2022-03-19 02:20:14,415 INFO L913 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] [2022-03-19 02:20:14,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-03-19 02:20:14,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2022-03-19 02:20:14,465 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) [2022-03-19 02:20:14,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 56 transitions. [2022-03-19 02:20:14,469 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 56 transitions. Word has length 13 [2022-03-19 02:20:14,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:20:14,469 INFO L478 AbstractCegarLoop]: Abstraction has 46 states and 56 transitions. [2022-03-19 02:20:14,470 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) [2022-03-19 02:20:14,470 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 56 transitions. [2022-03-19 02:20:14,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-03-19 02:20:14,471 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:20:14,471 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:20:14,472 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-19 02:20:14,472 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:20:14,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:20:14,474 INFO L85 PathProgramCache]: Analyzing trace with hash -1128673794, now seen corresponding path program 1 times [2022-03-19 02:20:14,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:20:14,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [42969196] [2022-03-19 02:20:14,476 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 02:20:14,476 INFO L85 PathProgramCache]: Analyzing trace with hash -1128673794, now seen corresponding path program 2 times [2022-03-19 02:20:14,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:20:14,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165502667] [2022-03-19 02:20:14,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:20:14,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:20:14,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:20:14,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:20:14,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:20:14,546 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:20:14,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:20:14,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165502667] [2022-03-19 02:20:14,547 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165502667] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:20:14,547 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:20:14,547 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-19 02:20:14,548 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:20:14,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [42969196] [2022-03-19 02:20:14,548 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [42969196] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:20:14,548 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:20:14,548 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-19 02:20:14,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476146757] [2022-03-19 02:20:14,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:20:14,549 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-19 02:20:14,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:20:14,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-19 02:20:14,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-19 02:20:14,550 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) [2022-03-19 02:20:14,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:20:14,713 INFO L93 Difference]: Finished difference Result 107 states and 138 transitions. [2022-03-19 02:20:14,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-19 02:20:14,714 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 [2022-03-19 02:20:14,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:20:14,715 INFO L225 Difference]: With dead ends: 107 [2022-03-19 02:20:14,715 INFO L226 Difference]: Without dead ends: 69 [2022-03-19 02:20:14,716 INFO L911 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 [2022-03-19 02:20:14,717 INFO L912 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 [2022-03-19 02:20:14,718 INFO L913 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] [2022-03-19 02:20:14,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-03-19 02:20:14,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 48. [2022-03-19 02:20:14,731 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) [2022-03-19 02:20:14,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 58 transitions. [2022-03-19 02:20:14,735 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 58 transitions. Word has length 13 [2022-03-19 02:20:14,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:20:14,735 INFO L478 AbstractCegarLoop]: Abstraction has 48 states and 58 transitions. [2022-03-19 02:20:14,735 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) [2022-03-19 02:20:14,736 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 58 transitions. [2022-03-19 02:20:14,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-19 02:20:14,736 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:20:14,736 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:20:14,737 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-19 02:20:14,737 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:20:14,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:20:14,738 INFO L85 PathProgramCache]: Analyzing trace with hash 556660632, now seen corresponding path program 1 times [2022-03-19 02:20:14,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:20:14,738 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [130188393] [2022-03-19 02:20:14,754 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:20:14,755 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:20:14,755 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:20:14,755 INFO L85 PathProgramCache]: Analyzing trace with hash 556660632, now seen corresponding path program 2 times [2022-03-19 02:20:14,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:20:14,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273426776] [2022-03-19 02:20:14,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:20:14,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:20:14,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:20:14,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:20:14,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:20:14,868 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-19 02:20:14,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:20:14,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273426776] [2022-03-19 02:20:14,869 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273426776] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:20:14,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921498437] [2022-03-19 02:20:14,869 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 02:20:14,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:20:14,870 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:20:14,875 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) [2022-03-19 02:20:14,921 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-19 02:20:14,999 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 02:20:14,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:20:15,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 3 conjunts are in the unsatisfiable core [2022-03-19 02:20:15,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:20:15,101 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-19 02:20:15,101 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:20:15,181 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-19 02:20:15,181 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [921498437] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:20:15,181 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:20:15,181 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-03-19 02:20:15,183 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:20:15,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [130188393] [2022-03-19 02:20:15,184 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [130188393] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:20:15,184 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:20:15,184 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 02:20:15,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937215669] [2022-03-19 02:20:15,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:20:15,184 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-19 02:20:15,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:20:15,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-19 02:20:15,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-03-19 02:20:15,187 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) [2022-03-19 02:20:15,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:20:15,379 INFO L93 Difference]: Finished difference Result 131 states and 172 transitions. [2022-03-19 02:20:15,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-19 02:20:15,380 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 [2022-03-19 02:20:15,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:20:15,386 INFO L225 Difference]: With dead ends: 131 [2022-03-19 02:20:15,386 INFO L226 Difference]: Without dead ends: 92 [2022-03-19 02:20:15,386 INFO L911 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 [2022-03-19 02:20:15,387 INFO L912 BasicCegarLoop]: 46 mSDtfsCounter, 126 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 02:20:15,388 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 58 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 02:20:15,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-03-19 02:20:15,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 71. [2022-03-19 02:20:15,407 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) [2022-03-19 02:20:15,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 91 transitions. [2022-03-19 02:20:15,412 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 91 transitions. Word has length 20 [2022-03-19 02:20:15,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:20:15,413 INFO L478 AbstractCegarLoop]: Abstraction has 71 states and 91 transitions. [2022-03-19 02:20:15,413 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) [2022-03-19 02:20:15,413 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 91 transitions. [2022-03-19 02:20:15,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-19 02:20:15,415 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:20:15,415 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:20:15,446 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-19 02:20:15,638 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 [2022-03-19 02:20:15,639 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:20:15,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:20:15,639 INFO L85 PathProgramCache]: Analyzing trace with hash -2023168326, now seen corresponding path program 3 times [2022-03-19 02:20:15,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:20:15,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [500704510] [2022-03-19 02:20:15,641 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:20:15,642 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:20:15,642 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:20:15,642 INFO L85 PathProgramCache]: Analyzing trace with hash -2023168326, now seen corresponding path program 4 times [2022-03-19 02:20:15,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:20:15,642 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773550279] [2022-03-19 02:20:15,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:20:15,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:20:15,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:20:15,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:20:15,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:20:15,731 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-19 02:20:15,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:20:15,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773550279] [2022-03-19 02:20:15,732 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773550279] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:20:15,732 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:20:15,732 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-19 02:20:15,732 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:20:15,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [500704510] [2022-03-19 02:20:15,733 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [500704510] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:20:15,734 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:20:15,734 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-19 02:20:15,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042825766] [2022-03-19 02:20:15,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:20:15,735 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-19 02:20:15,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:20:15,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-19 02:20:15,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-19 02:20:15,735 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) [2022-03-19 02:20:15,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:20:15,928 INFO L93 Difference]: Finished difference Result 116 states and 156 transitions. [2022-03-19 02:20:15,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-19 02:20:15,929 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 [2022-03-19 02:20:15,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:20:15,933 INFO L225 Difference]: With dead ends: 116 [2022-03-19 02:20:15,933 INFO L226 Difference]: Without dead ends: 111 [2022-03-19 02:20:15,934 INFO L911 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 [2022-03-19 02:20:15,941 INFO L912 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 [2022-03-19 02:20:15,942 INFO L913 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] [2022-03-19 02:20:15,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-03-19 02:20:15,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 72. [2022-03-19 02:20:15,959 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) [2022-03-19 02:20:15,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 93 transitions. [2022-03-19 02:20:15,960 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 93 transitions. Word has length 27 [2022-03-19 02:20:15,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:20:15,960 INFO L478 AbstractCegarLoop]: Abstraction has 72 states and 93 transitions. [2022-03-19 02:20:15,960 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) [2022-03-19 02:20:15,960 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 93 transitions. [2022-03-19 02:20:15,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-19 02:20:15,961 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:20:15,961 INFO L500 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] [2022-03-19 02:20:15,962 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-03-19 02:20:15,962 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:20:15,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:20:15,962 INFO L85 PathProgramCache]: Analyzing trace with hash -1646969817, now seen corresponding path program 1 times [2022-03-19 02:20:15,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:20:15,962 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1142126247] [2022-03-19 02:20:15,968 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:20:15,969 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:20:15,969 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:20:15,969 INFO L85 PathProgramCache]: Analyzing trace with hash -1646969817, now seen corresponding path program 2 times [2022-03-19 02:20:15,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:20:15,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205233044] [2022-03-19 02:20:15,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:20:15,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:20:16,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:20:16,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:20:16,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:20:16,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-03-19 02:20:16,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:20:16,085 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-03-19 02:20:16,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:20:16,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205233044] [2022-03-19 02:20:16,086 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205233044] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:20:16,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864724833] [2022-03-19 02:20:16,086 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 02:20:16,086 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:20:16,086 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:20:16,088 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) [2022-03-19 02:20:16,089 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-19 02:20:16,178 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 02:20:16,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:20:16,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-19 02:20:16,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:20:16,245 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-03-19 02:20:16,245 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:20:16,331 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-03-19 02:20:16,331 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1864724833] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:20:16,331 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:20:16,331 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 11 [2022-03-19 02:20:16,332 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:20:16,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1142126247] [2022-03-19 02:20:16,332 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1142126247] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:20:16,332 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:20:16,332 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-19 02:20:16,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8003622] [2022-03-19 02:20:16,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:20:16,332 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-19 02:20:16,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:20:16,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-19 02:20:16,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-03-19 02:20:16,333 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) [2022-03-19 02:20:16,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:20:16,627 INFO L93 Difference]: Finished difference Result 188 states and 258 transitions. [2022-03-19 02:20:16,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-19 02:20:16,629 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 [2022-03-19 02:20:16,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:20:16,632 INFO L225 Difference]: With dead ends: 188 [2022-03-19 02:20:16,637 INFO L226 Difference]: Without dead ends: 127 [2022-03-19 02:20:16,640 INFO L911 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 [2022-03-19 02:20:16,644 INFO L912 BasicCegarLoop]: 43 mSDtfsCounter, 228 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 02:20:16,644 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [232 Valid, 45 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 02:20:16,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-03-19 02:20:16,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 95. [2022-03-19 02:20:16,671 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) [2022-03-19 02:20:16,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 126 transitions. [2022-03-19 02:20:16,673 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 126 transitions. Word has length 36 [2022-03-19 02:20:16,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:20:16,673 INFO L478 AbstractCegarLoop]: Abstraction has 95 states and 126 transitions. [2022-03-19 02:20:16,673 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) [2022-03-19 02:20:16,673 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 126 transitions. [2022-03-19 02:20:16,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-03-19 02:20:16,681 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:20:16,681 INFO L500 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] [2022-03-19 02:20:16,710 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-19 02:20:16,895 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 [2022-03-19 02:20:16,896 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:20:16,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:20:16,896 INFO L85 PathProgramCache]: Analyzing trace with hash 1502656581, now seen corresponding path program 3 times [2022-03-19 02:20:16,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:20:16,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1921016924] [2022-03-19 02:20:16,898 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:20:16,898 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:20:16,898 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:20:16,898 INFO L85 PathProgramCache]: Analyzing trace with hash 1502656581, now seen corresponding path program 4 times [2022-03-19 02:20:16,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:20:16,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598234581] [2022-03-19 02:20:16,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:20:16,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:20:16,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:20:16,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:20:16,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:20:16,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-03-19 02:20:16,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:20:17,000 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-03-19 02:20:17,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:20:17,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598234581] [2022-03-19 02:20:17,000 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598234581] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:20:17,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2079714838] [2022-03-19 02:20:17,001 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 02:20:17,001 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:20:17,001 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:20:17,002 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) [2022-03-19 02:20:17,003 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-19 02:20:17,099 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 02:20:17,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:20:17,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-19 02:20:17,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:20:17,169 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-03-19 02:20:17,169 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:20:17,287 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-03-19 02:20:17,287 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2079714838] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:20:17,288 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:20:17,288 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 13 [2022-03-19 02:20:17,288 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:20:17,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1921016924] [2022-03-19 02:20:17,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1921016924] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:20:17,288 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:20:17,288 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-19 02:20:17,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900121862] [2022-03-19 02:20:17,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:20:17,289 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-19 02:20:17,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:20:17,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-19 02:20:17,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2022-03-19 02:20:17,289 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) [2022-03-19 02:20:17,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:20:17,598 INFO L93 Difference]: Finished difference Result 232 states and 323 transitions. [2022-03-19 02:20:17,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-19 02:20:17,599 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 [2022-03-19 02:20:17,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:20:17,601 INFO L225 Difference]: With dead ends: 232 [2022-03-19 02:20:17,601 INFO L226 Difference]: Without dead ends: 150 [2022-03-19 02:20:17,604 INFO L911 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 [2022-03-19 02:20:17,606 INFO L912 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 [2022-03-19 02:20:17,607 INFO L913 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] [2022-03-19 02:20:17,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2022-03-19 02:20:17,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 118. [2022-03-19 02:20:17,646 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) [2022-03-19 02:20:17,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 159 transitions. [2022-03-19 02:20:17,647 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 159 transitions. Word has length 43 [2022-03-19 02:20:17,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:20:17,647 INFO L478 AbstractCegarLoop]: Abstraction has 118 states and 159 transitions. [2022-03-19 02:20:17,647 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) [2022-03-19 02:20:17,647 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 159 transitions. [2022-03-19 02:20:17,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-03-19 02:20:17,649 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:20:17,649 INFO L500 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] [2022-03-19 02:20:17,676 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-19 02:20:17,867 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 [2022-03-19 02:20:17,868 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:20:17,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:20:17,868 INFO L85 PathProgramCache]: Analyzing trace with hash 399846123, now seen corresponding path program 5 times [2022-03-19 02:20:17,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:20:17,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [6478912] [2022-03-19 02:20:17,870 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:20:17,870 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:20:17,870 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:20:17,870 INFO L85 PathProgramCache]: Analyzing trace with hash 399846123, now seen corresponding path program 6 times [2022-03-19 02:20:17,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:20:17,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129947379] [2022-03-19 02:20:17,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:20:17,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:20:17,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:20:17,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:20:17,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:20:17,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-03-19 02:20:17,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:20:17,982 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-03-19 02:20:17,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:20:17,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129947379] [2022-03-19 02:20:17,982 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129947379] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:20:17,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442827197] [2022-03-19 02:20:17,983 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 02:20:17,983 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:20:17,983 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:20:17,984 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) [2022-03-19 02:20:18,007 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-19 02:20:18,081 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-19 02:20:18,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:20:18,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-19 02:20:18,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:20:18,162 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-03-19 02:20:18,162 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:20:18,302 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-03-19 02:20:18,303 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1442827197] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:20:18,304 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:20:18,304 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 15 [2022-03-19 02:20:18,304 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:20:18,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [6478912] [2022-03-19 02:20:18,304 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [6478912] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:20:18,304 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:20:18,304 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-19 02:20:18,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976340852] [2022-03-19 02:20:18,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:20:18,305 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-19 02:20:18,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:20:18,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-19 02:20:18,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2022-03-19 02:20:18,306 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) [2022-03-19 02:20:18,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:20:18,652 INFO L93 Difference]: Finished difference Result 276 states and 388 transitions. [2022-03-19 02:20:18,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-19 02:20:18,653 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 [2022-03-19 02:20:18,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:20:18,654 INFO L225 Difference]: With dead ends: 276 [2022-03-19 02:20:18,655 INFO L226 Difference]: Without dead ends: 173 [2022-03-19 02:20:18,656 INFO L911 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 [2022-03-19 02:20:18,657 INFO L912 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, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 02:20:18,657 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [363 Valid, 45 Invalid, 399 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 277 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 02:20:18,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2022-03-19 02:20:18,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 141. [2022-03-19 02:20:18,681 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) [2022-03-19 02:20:18,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 192 transitions. [2022-03-19 02:20:18,682 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 192 transitions. Word has length 50 [2022-03-19 02:20:18,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:20:18,683 INFO L478 AbstractCegarLoop]: Abstraction has 141 states and 192 transitions. [2022-03-19 02:20:18,683 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) [2022-03-19 02:20:18,684 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 192 transitions. [2022-03-19 02:20:18,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-03-19 02:20:18,685 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:20:18,685 INFO L500 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] [2022-03-19 02:20:18,707 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-19 02:20:18,899 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 [2022-03-19 02:20:18,900 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:20:18,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:20:18,900 INFO L85 PathProgramCache]: Analyzing trace with hash -246769791, now seen corresponding path program 7 times [2022-03-19 02:20:18,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:20:18,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [653940261] [2022-03-19 02:20:18,903 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:20:18,912 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:20:18,912 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:20:18,912 INFO L85 PathProgramCache]: Analyzing trace with hash -246769791, now seen corresponding path program 8 times [2022-03-19 02:20:18,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:20:18,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367605480] [2022-03-19 02:20:18,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:20:18,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:20:18,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:20:19,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:20:19,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:20:19,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-03-19 02:20:19,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:20:19,039 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-03-19 02:20:19,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:20:19,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367605480] [2022-03-19 02:20:19,039 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367605480] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:20:19,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606446958] [2022-03-19 02:20:19,040 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 02:20:19,040 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:20:19,040 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:20:19,044 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) [2022-03-19 02:20:19,045 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-19 02:20:19,138 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 02:20:19,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:20:19,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-19 02:20:19,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:20:19,225 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-03-19 02:20:19,226 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:20:19,363 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-03-19 02:20:19,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1606446958] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:20:19,363 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:20:19,363 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 17 [2022-03-19 02:20:19,364 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:20:19,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [653940261] [2022-03-19 02:20:19,364 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [653940261] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:20:19,364 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:20:19,364 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-19 02:20:19,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917941445] [2022-03-19 02:20:19,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:20:19,364 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-19 02:20:19,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:20:19,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-19 02:20:19,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=163, Unknown=0, NotChecked=0, Total=272 [2022-03-19 02:20:19,365 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) [2022-03-19 02:20:19,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:20:19,746 INFO L93 Difference]: Finished difference Result 320 states and 453 transitions. [2022-03-19 02:20:19,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-19 02:20:19,747 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 [2022-03-19 02:20:19,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:20:19,748 INFO L225 Difference]: With dead ends: 320 [2022-03-19 02:20:19,748 INFO L226 Difference]: Without dead ends: 196 [2022-03-19 02:20:19,749 INFO L911 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 [2022-03-19 02:20:19,750 INFO L912 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 [2022-03-19 02:20:19,750 INFO L913 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] [2022-03-19 02:20:19,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2022-03-19 02:20:19,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 164. [2022-03-19 02:20:19,771 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) [2022-03-19 02:20:19,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 225 transitions. [2022-03-19 02:20:19,773 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 225 transitions. Word has length 57 [2022-03-19 02:20:19,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:20:19,773 INFO L478 AbstractCegarLoop]: Abstraction has 164 states and 225 transitions. [2022-03-19 02:20:19,773 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) [2022-03-19 02:20:19,773 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 225 transitions. [2022-03-19 02:20:19,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-03-19 02:20:19,774 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:20:19,774 INFO L500 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] [2022-03-19 02:20:19,795 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-19 02:20:19,987 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 [2022-03-19 02:20:19,990 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:20:19,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:20:19,990 INFO L85 PathProgramCache]: Analyzing trace with hash -268874321, now seen corresponding path program 9 times [2022-03-19 02:20:19,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:20:19,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [843191186] [2022-03-19 02:20:19,992 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:20:19,992 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:20:19,992 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:20:19,992 INFO L85 PathProgramCache]: Analyzing trace with hash -268874321, now seen corresponding path program 10 times [2022-03-19 02:20:19,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:20:19,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713547682] [2022-03-19 02:20:19,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:20:19,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:20:20,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:20:20,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:20:20,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:20:20,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-03-19 02:20:20,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:20:20,101 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2022-03-19 02:20:20,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:20:20,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713547682] [2022-03-19 02:20:20,102 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713547682] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:20:20,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892898799] [2022-03-19 02:20:20,102 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 02:20:20,102 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:20:20,102 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:20:20,103 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 02:20:20,110 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-19 02:20:20,211 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 02:20:20,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:20:20,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-19 02:20:20,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:20:20,304 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2022-03-19 02:20:20,304 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:20:20,511 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2022-03-19 02:20:20,512 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [892898799] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:20:20,512 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:20:20,512 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 19 [2022-03-19 02:20:20,512 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:20:20,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [843191186] [2022-03-19 02:20:20,513 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [843191186] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:20:20,513 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:20:20,513 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-19 02:20:20,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699407326] [2022-03-19 02:20:20,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:20:20,513 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-19 02:20:20,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:20:20,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-19 02:20:20,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=202, Unknown=0, NotChecked=0, Total=342 [2022-03-19 02:20:20,514 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) [2022-03-19 02:20:20,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:20:20,999 INFO L93 Difference]: Finished difference Result 364 states and 518 transitions. [2022-03-19 02:20:20,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-19 02:20:21,000 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 [2022-03-19 02:20:21,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:20:21,001 INFO L225 Difference]: With dead ends: 364 [2022-03-19 02:20:21,001 INFO L226 Difference]: Without dead ends: 219 [2022-03-19 02:20:21,002 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=291, Invalid=465, Unknown=0, NotChecked=0, Total=756 [2022-03-19 02:20:21,003 INFO L912 BasicCegarLoop]: 43 mSDtfsCounter, 392 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 466 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s 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, 0.4s IncrementalHoareTripleChecker+Time [2022-03-19 02:20:21,003 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [396 Valid, 49 Invalid, 611 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 466 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-19 02:20:21,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2022-03-19 02:20:21,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 187. [2022-03-19 02:20:21,031 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) [2022-03-19 02:20:21,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 258 transitions. [2022-03-19 02:20:21,032 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 258 transitions. Word has length 64 [2022-03-19 02:20:21,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:20:21,032 INFO L478 AbstractCegarLoop]: Abstraction has 187 states and 258 transitions. [2022-03-19 02:20:21,032 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) [2022-03-19 02:20:21,033 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 258 transitions. [2022-03-19 02:20:21,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-03-19 02:20:21,035 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:20:21,035 INFO L500 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] [2022-03-19 02:20:21,055 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-19 02:20:21,247 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 [2022-03-19 02:20:21,248 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:20:21,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:20:21,248 INFO L85 PathProgramCache]: Analyzing trace with hash -150953283, now seen corresponding path program 11 times [2022-03-19 02:20:21,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:20:21,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2022110632] [2022-03-19 02:20:21,250 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:20:21,250 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:20:21,250 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:20:21,250 INFO L85 PathProgramCache]: Analyzing trace with hash -150953283, now seen corresponding path program 12 times [2022-03-19 02:20:21,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:20:21,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347860893] [2022-03-19 02:20:21,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:20:21,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:20:21,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:20:21,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:20:21,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:20:21,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-03-19 02:20:21,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:20:21,371 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2022-03-19 02:20:21,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:20:21,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347860893] [2022-03-19 02:20:21,371 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347860893] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:20:21,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886543220] [2022-03-19 02:20:21,371 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 02:20:21,371 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:20:21,372 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:20:21,373 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) [2022-03-19 02:20:21,374 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-19 02:20:21,474 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-19 02:20:21,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:20:21,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-19 02:20:21,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:20:21,691 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 25 proven. 1 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2022-03-19 02:20:21,692 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:20:21,976 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 25 proven. 1 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2022-03-19 02:20:21,977 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [886543220] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:20:21,977 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:20:21,977 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 7, 7] total 20 [2022-03-19 02:20:21,979 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:20:21,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2022110632] [2022-03-19 02:20:21,979 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2022110632] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:20:21,979 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:20:21,979 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-19 02:20:21,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375298451] [2022-03-19 02:20:21,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:20:21,980 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-19 02:20:21,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:20:21,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-19 02:20:21,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2022-03-19 02:20:21,981 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) [2022-03-19 02:20:22,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:20:22,611 INFO L93 Difference]: Finished difference Result 408 states and 583 transitions. [2022-03-19 02:20:22,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-19 02:20:22,612 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 [2022-03-19 02:20:22,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:20:22,614 INFO L225 Difference]: With dead ends: 408 [2022-03-19 02:20:22,614 INFO L226 Difference]: Without dead ends: 242 [2022-03-19 02:20:22,615 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 137 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=187, Invalid=683, Unknown=0, NotChecked=0, Total=870 [2022-03-19 02:20:22,616 INFO L912 BasicCegarLoop]: 43 mSDtfsCounter, 554 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 451 mSolverCounterSat, 184 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s 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, 0.4s IncrementalHoareTripleChecker+Time [2022-03-19 02:20:22,617 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [558 Valid, 49 Invalid, 635 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [184 Valid, 451 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-19 02:20:22,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2022-03-19 02:20:22,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 210. [2022-03-19 02:20:22,648 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) [2022-03-19 02:20:22,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 291 transitions. [2022-03-19 02:20:22,650 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 291 transitions. Word has length 71 [2022-03-19 02:20:22,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:20:22,651 INFO L478 AbstractCegarLoop]: Abstraction has 210 states and 291 transitions. [2022-03-19 02:20:22,651 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) [2022-03-19 02:20:22,651 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 291 transitions. [2022-03-19 02:20:22,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-03-19 02:20:22,652 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:20:22,652 INFO L500 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] [2022-03-19 02:20:22,680 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-19 02:20:22,869 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 [2022-03-19 02:20:22,869 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:20:22,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:20:22,869 INFO L85 PathProgramCache]: Analyzing trace with hash -1180638093, now seen corresponding path program 13 times [2022-03-19 02:20:22,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:20:22,870 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [723234521] [2022-03-19 02:20:22,871 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:20:22,871 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:20:22,871 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:20:22,871 INFO L85 PathProgramCache]: Analyzing trace with hash -1180638093, now seen corresponding path program 14 times [2022-03-19 02:20:22,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:20:22,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750472749] [2022-03-19 02:20:22,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:20:22,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:20:22,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:20:22,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:20:22,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:20:22,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-03-19 02:20:22,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:20:22,987 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2022-03-19 02:20:22,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:20:22,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750472749] [2022-03-19 02:20:22,988 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750472749] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:20:22,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106932067] [2022-03-19 02:20:22,988 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 02:20:22,988 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:20:22,988 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:20:22,990 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) [2022-03-19 02:20:22,991 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-19 02:20:23,108 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 02:20:23,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:20:23,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-19 02:20:23,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:20:23,247 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2022-03-19 02:20:23,247 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:20:23,511 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2022-03-19 02:20:23,511 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2106932067] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:20:23,512 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:20:23,512 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 11] total 23 [2022-03-19 02:20:23,512 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:20:23,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [723234521] [2022-03-19 02:20:23,512 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [723234521] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:20:23,512 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:20:23,512 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-19 02:20:23,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822677076] [2022-03-19 02:20:23,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:20:23,513 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-19 02:20:23,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:20:23,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-19 02:20:23,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=292, Unknown=0, NotChecked=0, Total=506 [2022-03-19 02:20:23,513 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) [2022-03-19 02:20:24,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:20:24,125 INFO L93 Difference]: Finished difference Result 452 states and 648 transitions. [2022-03-19 02:20:24,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-19 02:20:24,126 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 [2022-03-19 02:20:24,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:20:24,128 INFO L225 Difference]: With dead ends: 452 [2022-03-19 02:20:24,128 INFO L226 Difference]: Without dead ends: 265 [2022-03-19 02:20:24,129 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=441, Invalid=681, Unknown=0, NotChecked=0, Total=1122 [2022-03-19 02:20:24,130 INFO L912 BasicCegarLoop]: 43 mSDtfsCounter, 515 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 543 mSolverCounterSat, 182 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s 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, 0.5s IncrementalHoareTripleChecker+Time [2022-03-19 02:20:24,130 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [519 Valid, 51 Invalid, 725 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [182 Valid, 543 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-19 02:20:24,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2022-03-19 02:20:24,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 233. [2022-03-19 02:20:24,163 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) [2022-03-19 02:20:24,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 324 transitions. [2022-03-19 02:20:24,164 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 324 transitions. Word has length 78 [2022-03-19 02:20:24,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:20:24,165 INFO L478 AbstractCegarLoop]: Abstraction has 233 states and 324 transitions. [2022-03-19 02:20:24,165 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) [2022-03-19 02:20:24,165 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 324 transitions. [2022-03-19 02:20:24,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-03-19 02:20:24,166 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:20:24,166 INFO L500 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] [2022-03-19 02:20:24,193 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-19 02:20:24,379 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 [2022-03-19 02:20:24,380 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:20:24,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:20:24,380 INFO L85 PathProgramCache]: Analyzing trace with hash -1953261063, now seen corresponding path program 15 times [2022-03-19 02:20:24,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:20:24,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2063197311] [2022-03-19 02:20:24,381 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:20:24,382 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:20:24,382 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:20:24,382 INFO L85 PathProgramCache]: Analyzing trace with hash -1953261063, now seen corresponding path program 16 times [2022-03-19 02:20:24,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:20:24,382 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598505582] [2022-03-19 02:20:24,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:20:24,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:20:24,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:20:24,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:20:24,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:20:24,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-03-19 02:20:24,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:20:24,513 INFO L134 CoverageAnalysis]: Checked inductivity of 279 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2022-03-19 02:20:24,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:20:24,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598505582] [2022-03-19 02:20:24,513 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598505582] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:20:24,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2057624573] [2022-03-19 02:20:24,513 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 02:20:24,513 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:20:24,513 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:20:24,515 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) [2022-03-19 02:20:24,540 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-19 02:20:24,634 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 02:20:24,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:20:24,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-19 02:20:24,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:20:24,748 INFO L134 CoverageAnalysis]: Checked inductivity of 279 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2022-03-19 02:20:24,748 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:20:25,085 INFO L134 CoverageAnalysis]: Checked inductivity of 279 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2022-03-19 02:20:25,085 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2057624573] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:20:25,086 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:20:25,086 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 25 [2022-03-19 02:20:25,086 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:20:25,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2063197311] [2022-03-19 02:20:25,086 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2063197311] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:20:25,086 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:20:25,086 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-19 02:20:25,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039729325] [2022-03-19 02:20:25,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:20:25,086 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-19 02:20:25,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:20:25,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-19 02:20:25,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=343, Unknown=0, NotChecked=0, Total=600 [2022-03-19 02:20:25,088 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) [2022-03-19 02:20:25,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:20:25,850 INFO L93 Difference]: Finished difference Result 496 states and 713 transitions. [2022-03-19 02:20:25,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-19 02:20:25,851 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 [2022-03-19 02:20:25,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:20:25,853 INFO L225 Difference]: With dead ends: 496 [2022-03-19 02:20:25,853 INFO L226 Difference]: Without dead ends: 288 [2022-03-19 02:20:25,854 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=528, Invalid=804, Unknown=0, NotChecked=0, Total=1332 [2022-03-19 02:20:25,854 INFO L912 BasicCegarLoop]: 43 mSDtfsCounter, 444 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 849 mSolverCounterSat, 166 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s 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, 0.6s IncrementalHoareTripleChecker+Time [2022-03-19 02:20:25,855 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [448 Valid, 59 Invalid, 1015 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [166 Valid, 849 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-19 02:20:25,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2022-03-19 02:20:25,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 256. [2022-03-19 02:20:25,894 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) [2022-03-19 02:20:25,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 357 transitions. [2022-03-19 02:20:25,897 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 357 transitions. Word has length 85 [2022-03-19 02:20:25,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:20:25,897 INFO L478 AbstractCegarLoop]: Abstraction has 256 states and 357 transitions. [2022-03-19 02:20:25,897 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) [2022-03-19 02:20:25,897 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 357 transitions. [2022-03-19 02:20:25,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-03-19 02:20:25,903 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:20:25,904 INFO L500 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] [2022-03-19 02:20:25,931 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-19 02:20:26,118 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 [2022-03-19 02:20:26,119 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:20:26,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:20:26,119 INFO L85 PathProgramCache]: Analyzing trace with hash 1219178295, now seen corresponding path program 17 times [2022-03-19 02:20:26,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:20:26,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [384305019] [2022-03-19 02:20:26,121 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:20:26,121 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:20:26,121 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:20:26,121 INFO L85 PathProgramCache]: Analyzing trace with hash 1219178295, now seen corresponding path program 18 times [2022-03-19 02:20:26,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:20:26,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548353486] [2022-03-19 02:20:26,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:20:26,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:20:26,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:20:26,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:20:26,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:20:26,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2022-03-19 02:20:26,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:20:26,268 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2022-03-19 02:20:26,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:20:26,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548353486] [2022-03-19 02:20:26,269 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548353486] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:20:26,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209311248] [2022-03-19 02:20:26,269 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 02:20:26,269 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:20:26,269 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:20:26,270 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) [2022-03-19 02:20:26,272 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-19 02:20:26,429 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-19 02:20:26,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:20:26,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-19 02:20:26,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:20:26,639 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 37 proven. 1 refuted. 0 times theorem prover too weak. 307 trivial. 0 not checked. [2022-03-19 02:20:26,639 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:20:26,898 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 37 proven. 1 refuted. 0 times theorem prover too weak. 307 trivial. 0 not checked. [2022-03-19 02:20:26,898 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1209311248] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:20:26,898 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:20:26,898 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 7, 7] total 23 [2022-03-19 02:20:26,898 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:20:26,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [384305019] [2022-03-19 02:20:26,899 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [384305019] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:20:26,899 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:20:26,899 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-19 02:20:26,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072711330] [2022-03-19 02:20:26,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:20:26,899 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-19 02:20:26,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:20:26,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-19 02:20:26,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=399, Unknown=0, NotChecked=0, Total=506 [2022-03-19 02:20:26,900 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) [2022-03-19 02:20:27,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:20:27,638 INFO L93 Difference]: Finished difference Result 540 states and 778 transitions. [2022-03-19 02:20:27,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-19 02:20:27,638 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 [2022-03-19 02:20:27,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:20:27,640 INFO L225 Difference]: With dead ends: 540 [2022-03-19 02:20:27,640 INFO L226 Difference]: Without dead ends: 311 [2022-03-19 02:20:27,640 INFO L911 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 [2022-03-19 02:20:27,641 INFO L912 BasicCegarLoop]: 43 mSDtfsCounter, 619 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 633 mSolverCounterSat, 245 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s 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, 0.5s IncrementalHoareTripleChecker+Time [2022-03-19 02:20:27,641 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [623 Valid, 47 Invalid, 878 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [245 Valid, 633 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-19 02:20:27,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2022-03-19 02:20:27,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 279. [2022-03-19 02:20:27,695 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) [2022-03-19 02:20:27,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 390 transitions. [2022-03-19 02:20:27,697 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 390 transitions. Word has length 92 [2022-03-19 02:20:27,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:20:27,697 INFO L478 AbstractCegarLoop]: Abstraction has 279 states and 390 transitions. [2022-03-19 02:20:27,697 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) [2022-03-19 02:20:27,697 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 390 transitions. [2022-03-19 02:20:27,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-03-19 02:20:27,702 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:20:27,702 INFO L500 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] [2022-03-19 02:20:27,726 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-03-19 02:20:27,923 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 [2022-03-19 02:20:27,924 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:20:27,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:20:27,924 INFO L85 PathProgramCache]: Analyzing trace with hash -1117504203, now seen corresponding path program 19 times [2022-03-19 02:20:27,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:20:27,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1148122007] [2022-03-19 02:20:27,926 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:20:27,926 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:20:27,926 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:20:27,926 INFO L85 PathProgramCache]: Analyzing trace with hash -1117504203, now seen corresponding path program 20 times [2022-03-19 02:20:27,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:20:27,926 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784280654] [2022-03-19 02:20:27,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:20:27,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:20:27,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:20:28,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:20:28,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:20:28,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-03-19 02:20:28,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:20:28,077 INFO L134 CoverageAnalysis]: Checked inductivity of 418 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 297 trivial. 0 not checked. [2022-03-19 02:20:28,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:20:28,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784280654] [2022-03-19 02:20:28,077 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784280654] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:20:28,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674796554] [2022-03-19 02:20:28,077 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 02:20:28,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:20:28,078 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:20:28,079 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) [2022-03-19 02:20:28,102 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-19 02:20:28,208 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 02:20:28,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:20:28,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-19 02:20:28,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:20:28,346 INFO L134 CoverageAnalysis]: Checked inductivity of 418 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 297 trivial. 0 not checked. [2022-03-19 02:20:28,346 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:20:28,648 INFO L134 CoverageAnalysis]: Checked inductivity of 418 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 297 trivial. 0 not checked. [2022-03-19 02:20:28,649 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1674796554] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:20:28,649 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:20:28,649 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 29 [2022-03-19 02:20:28,649 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:20:28,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1148122007] [2022-03-19 02:20:28,649 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1148122007] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:20:28,649 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:20:28,649 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-19 02:20:28,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622927530] [2022-03-19 02:20:28,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:20:28,650 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-19 02:20:28,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:20:28,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-19 02:20:28,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=355, Invalid=457, Unknown=0, NotChecked=0, Total=812 [2022-03-19 02:20:28,651 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) [2022-03-19 02:20:29,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:20:29,386 INFO L93 Difference]: Finished difference Result 584 states and 843 transitions. [2022-03-19 02:20:29,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-19 02:20:29,386 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 [2022-03-19 02:20:29,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:20:29,388 INFO L225 Difference]: With dead ends: 584 [2022-03-19 02:20:29,388 INFO L226 Difference]: Without dead ends: 334 [2022-03-19 02:20:29,389 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=726, Invalid=1080, Unknown=0, NotChecked=0, Total=1806 [2022-03-19 02:20:29,389 INFO L912 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 [2022-03-19 02:20:29,389 INFO L913 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] [2022-03-19 02:20:29,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2022-03-19 02:20:29,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 302. [2022-03-19 02:20:29,437 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) [2022-03-19 02:20:29,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 423 transitions. [2022-03-19 02:20:29,439 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 423 transitions. Word has length 99 [2022-03-19 02:20:29,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:20:29,439 INFO L478 AbstractCegarLoop]: Abstraction has 302 states and 423 transitions. [2022-03-19 02:20:29,439 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) [2022-03-19 02:20:29,439 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 423 transitions. [2022-03-19 02:20:29,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-03-19 02:20:29,440 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:20:29,441 INFO L500 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] [2022-03-19 02:20:29,467 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-19 02:20:29,648 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 [2022-03-19 02:20:29,649 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:20:29,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:20:29,649 INFO L85 PathProgramCache]: Analyzing trace with hash 1433890299, now seen corresponding path program 21 times [2022-03-19 02:20:29,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:20:29,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [992464582] [2022-03-19 02:20:29,651 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:20:29,651 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:20:29,651 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:20:29,651 INFO L85 PathProgramCache]: Analyzing trace with hash 1433890299, now seen corresponding path program 22 times [2022-03-19 02:20:29,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:20:29,651 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856545379] [2022-03-19 02:20:29,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:20:29,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:20:29,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:20:29,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:20:29,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:20:29,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-03-19 02:20:29,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:20:29,821 INFO L134 CoverageAnalysis]: Checked inductivity of 498 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 354 trivial. 0 not checked. [2022-03-19 02:20:29,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:20:29,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856545379] [2022-03-19 02:20:29,822 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856545379] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:20:29,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [692396173] [2022-03-19 02:20:29,822 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 02:20:29,822 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:20:29,822 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:20:29,824 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) [2022-03-19 02:20:29,825 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-19 02:20:29,956 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 02:20:29,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:20:29,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 422 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-19 02:20:29,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:20:30,101 INFO L134 CoverageAnalysis]: Checked inductivity of 498 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 354 trivial. 0 not checked. [2022-03-19 02:20:30,101 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:20:30,500 INFO L134 CoverageAnalysis]: Checked inductivity of 498 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 354 trivial. 0 not checked. [2022-03-19 02:20:30,500 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [692396173] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:20:30,500 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:20:30,500 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15, 15] total 31 [2022-03-19 02:20:30,501 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:20:30,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [992464582] [2022-03-19 02:20:30,501 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [992464582] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:20:30,501 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:20:30,501 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-03-19 02:20:30,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274753162] [2022-03-19 02:20:30,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:20:30,501 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-19 02:20:30,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:20:30,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-19 02:20:30,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=410, Invalid=520, Unknown=0, NotChecked=0, Total=930 [2022-03-19 02:20:30,502 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) [2022-03-19 02:20:31,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:20:31,355 INFO L93 Difference]: Finished difference Result 628 states and 908 transitions. [2022-03-19 02:20:31,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-19 02:20:31,356 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 [2022-03-19 02:20:31,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:20:31,358 INFO L225 Difference]: With dead ends: 628 [2022-03-19 02:20:31,358 INFO L226 Difference]: Without dead ends: 357 [2022-03-19 02:20:31,359 INFO L911 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 [2022-03-19 02:20:31,360 INFO L912 BasicCegarLoop]: 43 mSDtfsCounter, 644 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 865 mSolverCounterSat, 276 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s 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, 0.6s IncrementalHoareTripleChecker+Time [2022-03-19 02:20:31,360 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [648 Valid, 49 Invalid, 1141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [276 Valid, 865 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-19 02:20:31,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2022-03-19 02:20:31,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 325. [2022-03-19 02:20:31,404 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) [2022-03-19 02:20:31,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 456 transitions. [2022-03-19 02:20:31,405 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 456 transitions. Word has length 106 [2022-03-19 02:20:31,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:20:31,406 INFO L478 AbstractCegarLoop]: Abstraction has 325 states and 456 transitions. [2022-03-19 02:20:31,406 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) [2022-03-19 02:20:31,406 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 456 transitions. [2022-03-19 02:20:31,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-03-19 02:20:31,407 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:20:31,407 INFO L500 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] [2022-03-19 02:20:31,431 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-19 02:20:31,631 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 [2022-03-19 02:20:31,632 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:20:31,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:20:31,632 INFO L85 PathProgramCache]: Analyzing trace with hash -464302991, now seen corresponding path program 23 times [2022-03-19 02:20:31,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:20:31,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [37221885] [2022-03-19 02:20:31,643 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:20:31,643 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:20:31,644 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:20:31,644 INFO L85 PathProgramCache]: Analyzing trace with hash -464302991, now seen corresponding path program 24 times [2022-03-19 02:20:31,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:20:31,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151979845] [2022-03-19 02:20:31,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:20:31,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:20:31,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:20:31,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:20:31,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:20:31,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-03-19 02:20:31,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:20:31,847 INFO L134 CoverageAnalysis]: Checked inductivity of 585 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 416 trivial. 0 not checked. [2022-03-19 02:20:31,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:20:31,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151979845] [2022-03-19 02:20:31,847 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151979845] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:20:31,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [335088510] [2022-03-19 02:20:31,847 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 02:20:31,847 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:20:31,848 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:20:31,852 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) [2022-03-19 02:20:31,857 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-19 02:20:31,975 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-19 02:20:31,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:20:31,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-19 02:20:31,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:20:32,187 INFO L134 CoverageAnalysis]: Checked inductivity of 585 backedges. 49 proven. 1 refuted. 0 times theorem prover too weak. 535 trivial. 0 not checked. [2022-03-19 02:20:32,188 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:20:32,449 INFO L134 CoverageAnalysis]: Checked inductivity of 585 backedges. 49 proven. 1 refuted. 0 times theorem prover too weak. 535 trivial. 0 not checked. [2022-03-19 02:20:32,450 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [335088510] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:20:32,450 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:20:32,450 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 7, 7] total 26 [2022-03-19 02:20:32,450 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:20:32,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [37221885] [2022-03-19 02:20:32,450 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [37221885] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:20:32,450 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:20:32,451 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-03-19 02:20:32,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176843001] [2022-03-19 02:20:32,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:20:32,451 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-19 02:20:32,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:20:32,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-19 02:20:32,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=501, Unknown=0, NotChecked=0, Total=650 [2022-03-19 02:20:32,452 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) [2022-03-19 02:20:33,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:20:33,444 INFO L93 Difference]: Finished difference Result 672 states and 973 transitions. [2022-03-19 02:20:33,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-19 02:20:33,445 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 [2022-03-19 02:20:33,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:20:33,449 INFO L225 Difference]: With dead ends: 672 [2022-03-19 02:20:33,449 INFO L226 Difference]: Without dead ends: 380 [2022-03-19 02:20:33,451 INFO L911 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 [2022-03-19 02:20:33,451 INFO L912 BasicCegarLoop]: 43 mSDtfsCounter, 727 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 834 mSolverCounterSat, 288 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s 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, 0.7s IncrementalHoareTripleChecker+Time [2022-03-19 02:20:33,451 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [731 Valid, 51 Invalid, 1122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [288 Valid, 834 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-19 02:20:33,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2022-03-19 02:20:33,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 348. [2022-03-19 02:20:33,511 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) [2022-03-19 02:20:33,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 489 transitions. [2022-03-19 02:20:33,512 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 489 transitions. Word has length 113 [2022-03-19 02:20:33,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:20:33,512 INFO L478 AbstractCegarLoop]: Abstraction has 348 states and 489 transitions. [2022-03-19 02:20:33,513 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) [2022-03-19 02:20:33,513 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 489 transitions. [2022-03-19 02:20:33,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-03-19 02:20:33,514 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:20:33,515 INFO L500 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] [2022-03-19 02:20:33,535 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-19 02:20:33,720 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 [2022-03-19 02:20:33,720 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:20:33,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:20:33,720 INFO L85 PathProgramCache]: Analyzing trace with hash 551870655, now seen corresponding path program 25 times [2022-03-19 02:20:33,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:20:33,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1767173917] [2022-03-19 02:20:33,722 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:20:33,722 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:20:33,722 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:20:33,722 INFO L85 PathProgramCache]: Analyzing trace with hash 551870655, now seen corresponding path program 26 times [2022-03-19 02:20:33,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:20:33,722 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426853321] [2022-03-19 02:20:33,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:20:33,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:20:33,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:20:33,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:20:33,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:20:33,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2022-03-19 02:20:33,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:20:33,916 INFO L134 CoverageAnalysis]: Checked inductivity of 679 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 483 trivial. 0 not checked. [2022-03-19 02:20:33,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:20:33,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426853321] [2022-03-19 02:20:33,916 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426853321] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:20:33,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644697320] [2022-03-19 02:20:33,916 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 02:20:33,917 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:20:33,917 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:20:33,920 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) [2022-03-19 02:20:33,948 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-19 02:20:34,065 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 02:20:34,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:20:34,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 474 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-19 02:20:34,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:20:34,241 INFO L134 CoverageAnalysis]: Checked inductivity of 679 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 483 trivial. 0 not checked. [2022-03-19 02:20:34,241 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:20:34,669 INFO L134 CoverageAnalysis]: Checked inductivity of 679 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 483 trivial. 0 not checked. [2022-03-19 02:20:34,669 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1644697320] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:20:34,670 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:20:34,670 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 17] total 35 [2022-03-19 02:20:34,670 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:20:34,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1767173917] [2022-03-19 02:20:34,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1767173917] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:20:34,670 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:20:34,670 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-03-19 02:20:34,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918348450] [2022-03-19 02:20:34,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:20:34,671 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-19 02:20:34,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:20:34,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-19 02:20:34,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=532, Invalid=658, Unknown=0, NotChecked=0, Total=1190 [2022-03-19 02:20:34,672 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) [2022-03-19 02:20:35,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:20:35,560 INFO L93 Difference]: Finished difference Result 716 states and 1038 transitions. [2022-03-19 02:20:35,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-19 02:20:35,561 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 [2022-03-19 02:20:35,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:20:35,563 INFO L225 Difference]: With dead ends: 716 [2022-03-19 02:20:35,563 INFO L226 Difference]: Without dead ends: 403 [2022-03-19 02:20:35,565 INFO L911 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 [2022-03-19 02:20:35,565 INFO L912 BasicCegarLoop]: 43 mSDtfsCounter, 940 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 867 mSolverCounterSat, 415 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s 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, 0.6s IncrementalHoareTripleChecker+Time [2022-03-19 02:20:35,565 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [944 Valid, 45 Invalid, 1282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [415 Valid, 867 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-19 02:20:35,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2022-03-19 02:20:35,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 371. [2022-03-19 02:20:35,635 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) [2022-03-19 02:20:35,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 522 transitions. [2022-03-19 02:20:35,638 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 522 transitions. Word has length 120 [2022-03-19 02:20:35,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:20:35,638 INFO L478 AbstractCegarLoop]: Abstraction has 371 states and 522 transitions. [2022-03-19 02:20:35,638 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) [2022-03-19 02:20:35,638 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 522 transitions. [2022-03-19 02:20:35,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-03-19 02:20:35,640 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:20:35,640 INFO L500 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] [2022-03-19 02:20:35,667 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-03-19 02:20:35,855 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 [2022-03-19 02:20:35,855 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:20:35,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:20:35,856 INFO L85 PathProgramCache]: Analyzing trace with hash -37648467, now seen corresponding path program 27 times [2022-03-19 02:20:35,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:20:35,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1098796884] [2022-03-19 02:20:35,857 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:20:35,857 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:20:35,857 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:20:35,857 INFO L85 PathProgramCache]: Analyzing trace with hash -37648467, now seen corresponding path program 28 times [2022-03-19 02:20:35,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:20:35,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409700579] [2022-03-19 02:20:35,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:20:35,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:20:35,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:20:36,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:20:36,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:20:36,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2022-03-19 02:20:36,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:20:36,059 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 555 trivial. 0 not checked. [2022-03-19 02:20:36,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:20:36,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409700579] [2022-03-19 02:20:36,059 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409700579] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:20:36,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1157974079] [2022-03-19 02:20:36,059 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 02:20:36,059 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:20:36,060 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:20:36,064 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) [2022-03-19 02:20:36,065 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-19 02:20:36,216 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 02:20:36,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:20:36,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 500 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-19 02:20:36,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:20:36,427 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 555 trivial. 0 not checked. [2022-03-19 02:20:36,428 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:20:36,928 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 555 trivial. 0 not checked. [2022-03-19 02:20:36,929 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1157974079] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:20:36,929 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:20:36,929 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18, 18] total 37 [2022-03-19 02:20:36,929 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:20:36,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1098796884] [2022-03-19 02:20:36,929 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1098796884] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:20:36,929 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:20:36,929 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-03-19 02:20:36,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852155966] [2022-03-19 02:20:36,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:20:36,929 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-19 02:20:36,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:20:36,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-19 02:20:36,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=599, Invalid=733, Unknown=0, NotChecked=0, Total=1332 [2022-03-19 02:20:36,931 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) [2022-03-19 02:20:37,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:20:37,892 INFO L93 Difference]: Finished difference Result 760 states and 1103 transitions. [2022-03-19 02:20:37,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-19 02:20:37,892 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 [2022-03-19 02:20:37,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:20:37,894 INFO L225 Difference]: With dead ends: 760 [2022-03-19 02:20:37,894 INFO L226 Difference]: Without dead ends: 426 [2022-03-19 02:20:37,896 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 241 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1218, Invalid=1752, Unknown=0, NotChecked=0, Total=2970 [2022-03-19 02:20:37,897 INFO L912 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, 0.7s IncrementalHoareTripleChecker+Time [2022-03-19 02:20:37,897 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [909 Valid, 49 Invalid, 1278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [376 Valid, 902 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-19 02:20:37,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2022-03-19 02:20:37,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 394. [2022-03-19 02:20:37,966 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) [2022-03-19 02:20:37,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 555 transitions. [2022-03-19 02:20:37,967 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 555 transitions. Word has length 127 [2022-03-19 02:20:37,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:20:37,968 INFO L478 AbstractCegarLoop]: Abstraction has 394 states and 555 transitions. [2022-03-19 02:20:37,968 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) [2022-03-19 02:20:37,968 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 555 transitions. [2022-03-19 02:20:37,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-03-19 02:20:37,969 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:20:37,969 INFO L500 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] [2022-03-19 02:20:37,990 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-03-19 02:20:38,182 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 [2022-03-19 02:20:38,182 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:20:38,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:20:38,182 INFO L85 PathProgramCache]: Analyzing trace with hash 408078211, now seen corresponding path program 29 times [2022-03-19 02:20:38,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:20:38,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [453589954] [2022-03-19 02:20:38,184 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:20:38,184 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:20:38,184 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:20:38,185 INFO L85 PathProgramCache]: Analyzing trace with hash 408078211, now seen corresponding path program 30 times [2022-03-19 02:20:38,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:20:38,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819301566] [2022-03-19 02:20:38,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:20:38,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:20:38,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:20:38,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:20:38,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:20:38,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2022-03-19 02:20:38,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:20:38,421 INFO L134 CoverageAnalysis]: Checked inductivity of 888 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 632 trivial. 0 not checked. [2022-03-19 02:20:38,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:20:38,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819301566] [2022-03-19 02:20:38,421 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819301566] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:20:38,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112043846] [2022-03-19 02:20:38,422 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 02:20:38,422 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:20:38,422 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:20:38,423 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) [2022-03-19 02:20:38,447 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-19 02:20:38,566 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-19 02:20:38,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:20:38,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-19 02:20:38,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:20:38,800 INFO L134 CoverageAnalysis]: Checked inductivity of 888 backedges. 61 proven. 1 refuted. 0 times theorem prover too weak. 826 trivial. 0 not checked. [2022-03-19 02:20:38,800 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:20:39,069 INFO L134 CoverageAnalysis]: Checked inductivity of 888 backedges. 61 proven. 1 refuted. 0 times theorem prover too weak. 826 trivial. 0 not checked. [2022-03-19 02:20:39,069 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [112043846] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:20:39,069 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:20:39,069 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 7, 7] total 29 [2022-03-19 02:20:39,069 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:20:39,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [453589954] [2022-03-19 02:20:39,070 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [453589954] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:20:39,070 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:20:39,070 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-03-19 02:20:39,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261075498] [2022-03-19 02:20:39,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:20:39,070 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-19 02:20:39,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:20:39,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-19 02:20:39,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=612, Unknown=0, NotChecked=0, Total=812 [2022-03-19 02:20:39,071 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) [2022-03-19 02:20:40,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:20:40,054 INFO L93 Difference]: Finished difference Result 804 states and 1168 transitions. [2022-03-19 02:20:40,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-19 02:20:40,054 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 [2022-03-19 02:20:40,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:20:40,056 INFO L225 Difference]: With dead ends: 804 [2022-03-19 02:20:40,056 INFO L226 Difference]: Without dead ends: 449 [2022-03-19 02:20:40,058 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 310 GetRequests, 263 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 372 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=583, Invalid=1673, Unknown=0, NotChecked=0, Total=2256 [2022-03-19 02:20:40,058 INFO L912 BasicCegarLoop]: 43 mSDtfsCounter, 997 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 893 mSolverCounterSat, 388 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s 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, 0.6s IncrementalHoareTripleChecker+Time [2022-03-19 02:20:40,059 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [1001 Valid, 49 Invalid, 1281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [388 Valid, 893 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-19 02:20:40,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2022-03-19 02:20:40,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 417. [2022-03-19 02:20:40,149 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) [2022-03-19 02:20:40,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 588 transitions. [2022-03-19 02:20:40,150 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 588 transitions. Word has length 134 [2022-03-19 02:20:40,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:20:40,150 INFO L478 AbstractCegarLoop]: Abstraction has 417 states and 588 transitions. [2022-03-19 02:20:40,151 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) [2022-03-19 02:20:40,151 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 588 transitions. [2022-03-19 02:20:40,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-03-19 02:20:40,153 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:20:40,153 INFO L500 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] [2022-03-19 02:20:40,179 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-03-19 02:20:40,377 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 [2022-03-19 02:20:40,377 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:20:40,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:20:40,378 INFO L85 PathProgramCache]: Analyzing trace with hash 143634153, now seen corresponding path program 31 times [2022-03-19 02:20:40,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:20:40,378 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [220672119] [2022-03-19 02:20:40,379 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:20:40,379 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:20:40,379 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:20:40,379 INFO L85 PathProgramCache]: Analyzing trace with hash 143634153, now seen corresponding path program 32 times [2022-03-19 02:20:40,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:20:40,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817362533] [2022-03-19 02:20:40,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:20:40,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:20:40,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:20:40,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:20:40,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:20:40,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2022-03-19 02:20:40,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:20:40,617 INFO L134 CoverageAnalysis]: Checked inductivity of 1003 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 714 trivial. 0 not checked. [2022-03-19 02:20:40,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:20:40,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817362533] [2022-03-19 02:20:40,617 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817362533] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:20:40,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478922384] [2022-03-19 02:20:40,617 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 02:20:40,617 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:20:40,618 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:20:40,619 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) [2022-03-19 02:20:40,622 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-19 02:20:40,785 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 02:20:40,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:20:40,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 552 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-19 02:20:40,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:20:41,009 INFO L134 CoverageAnalysis]: Checked inductivity of 1003 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 714 trivial. 0 not checked. [2022-03-19 02:20:41,009 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:20:41,630 INFO L134 CoverageAnalysis]: Checked inductivity of 1003 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 714 trivial. 0 not checked. [2022-03-19 02:20:41,630 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1478922384] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:20:41,630 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:20:41,630 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20, 20] total 41 [2022-03-19 02:20:41,631 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:20:41,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [220672119] [2022-03-19 02:20:41,631 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [220672119] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:20:41,631 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:20:41,631 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-03-19 02:20:41,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093618588] [2022-03-19 02:20:41,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:20:41,631 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-19 02:20:41,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:20:41,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-19 02:20:41,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=745, Invalid=895, Unknown=0, NotChecked=0, Total=1640 [2022-03-19 02:20:41,633 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) [2022-03-19 02:20:42,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:20:42,683 INFO L93 Difference]: Finished difference Result 848 states and 1233 transitions. [2022-03-19 02:20:42,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-19 02:20:42,684 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 [2022-03-19 02:20:42,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:20:42,686 INFO L225 Difference]: With dead ends: 848 [2022-03-19 02:20:42,686 INFO L226 Difference]: Without dead ends: 472 [2022-03-19 02:20:42,688 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 267 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1512, Invalid=2148, Unknown=0, NotChecked=0, Total=3660 [2022-03-19 02:20:42,688 INFO L912 BasicCegarLoop]: 43 mSDtfsCounter, 1221 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 939 mSolverCounterSat, 486 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s 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, 0.7s IncrementalHoareTripleChecker+Time [2022-03-19 02:20:42,689 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [1225 Valid, 45 Invalid, 1425 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [486 Valid, 939 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-19 02:20:42,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2022-03-19 02:20:42,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 440. [2022-03-19 02:20:42,781 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) [2022-03-19 02:20:42,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 621 transitions. [2022-03-19 02:20:42,782 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 621 transitions. Word has length 141 [2022-03-19 02:20:42,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:20:42,783 INFO L478 AbstractCegarLoop]: Abstraction has 440 states and 621 transitions. [2022-03-19 02:20:42,783 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) [2022-03-19 02:20:42,783 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 621 transitions. [2022-03-19 02:20:42,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2022-03-19 02:20:42,785 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:20:42,785 INFO L500 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] [2022-03-19 02:20:42,810 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-03-19 02:20:43,003 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 [2022-03-19 02:20:43,003 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:20:43,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:20:43,004 INFO L85 PathProgramCache]: Analyzing trace with hash 2040554055, now seen corresponding path program 33 times [2022-03-19 02:20:43,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:20:43,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [289047092] [2022-03-19 02:20:43,005 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:20:43,006 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:20:43,006 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:20:43,006 INFO L85 PathProgramCache]: Analyzing trace with hash 2040554055, now seen corresponding path program 34 times [2022-03-19 02:20:43,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:20:43,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345222838] [2022-03-19 02:20:43,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:20:43,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:20:43,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:20:43,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:20:43,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:20:43,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2022-03-19 02:20:43,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:20:43,268 INFO L134 CoverageAnalysis]: Checked inductivity of 1125 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 801 trivial. 0 not checked. [2022-03-19 02:20:43,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:20:43,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345222838] [2022-03-19 02:20:43,269 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345222838] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:20:43,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [414070671] [2022-03-19 02:20:43,269 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 02:20:43,269 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:20:43,269 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:20:43,270 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) [2022-03-19 02:20:43,272 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-03-19 02:20:43,425 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 02:20:43,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:20:43,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 578 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-19 02:20:43,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:20:43,653 INFO L134 CoverageAnalysis]: Checked inductivity of 1125 backedges. 0 proven. 800 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2022-03-19 02:20:43,653 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:20:44,242 INFO L134 CoverageAnalysis]: Checked inductivity of 1125 backedges. 0 proven. 800 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2022-03-19 02:20:44,243 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [414070671] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:20:44,243 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:20:44,243 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21, 21] total 43 [2022-03-19 02:20:44,243 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:20:44,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [289047092] [2022-03-19 02:20:44,243 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [289047092] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:20:44,243 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:20:44,243 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-03-19 02:20:44,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011224463] [2022-03-19 02:20:44,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:20:44,244 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-19 02:20:44,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:20:44,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-19 02:20:44,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=824, Invalid=982, Unknown=0, NotChecked=0, Total=1806 [2022-03-19 02:20:44,245 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) [2022-03-19 02:20:45,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:20:45,321 INFO L93 Difference]: Finished difference Result 892 states and 1298 transitions. [2022-03-19 02:20:45,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-19 02:20:45,322 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 [2022-03-19 02:20:45,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:20:45,325 INFO L225 Difference]: With dead ends: 892 [2022-03-19 02:20:45,325 INFO L226 Difference]: Without dead ends: 495 [2022-03-19 02:20:45,327 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 342 GetRequests, 280 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1671, Invalid=2361, Unknown=0, NotChecked=0, Total=4032 [2022-03-19 02:20:45,327 INFO L912 BasicCegarLoop]: 43 mSDtfsCounter, 1032 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 1077 mSolverCounterSat, 405 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s 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 [2022-03-19 02:20:45,327 INFO L913 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] [2022-03-19 02:20:45,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2022-03-19 02:20:45,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 463. [2022-03-19 02:20:45,441 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) [2022-03-19 02:20:45,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 463 states to 463 states and 654 transitions. [2022-03-19 02:20:45,442 INFO L78 Accepts]: Start accepts. Automaton has 463 states and 654 transitions. Word has length 148 [2022-03-19 02:20:45,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:20:45,443 INFO L478 AbstractCegarLoop]: Abstraction has 463 states and 654 transitions. [2022-03-19 02:20:45,443 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) [2022-03-19 02:20:45,443 INFO L276 IsEmpty]: Start isEmpty. Operand 463 states and 654 transitions. [2022-03-19 02:20:45,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-03-19 02:20:45,445 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:20:45,445 INFO L500 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] [2022-03-19 02:20:45,474 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-03-19 02:20:45,669 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 [2022-03-19 02:20:45,670 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:20:45,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:20:45,670 INFO L85 PathProgramCache]: Analyzing trace with hash 1629389349, now seen corresponding path program 35 times [2022-03-19 02:20:45,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:20:45,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2111817591] [2022-03-19 02:20:45,672 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:20:45,672 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:20:45,672 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:20:45,672 INFO L85 PathProgramCache]: Analyzing trace with hash 1629389349, now seen corresponding path program 36 times [2022-03-19 02:20:45,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:20:45,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256954776] [2022-03-19 02:20:45,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:20:45,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:20:45,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:20:45,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:20:45,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:20:45,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2022-03-19 02:20:45,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:20:45,932 INFO L134 CoverageAnalysis]: Checked inductivity of 1254 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 893 trivial. 0 not checked. [2022-03-19 02:20:45,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:20:45,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256954776] [2022-03-19 02:20:45,933 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256954776] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:20:45,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619949266] [2022-03-19 02:20:45,933 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 02:20:45,933 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:20:45,933 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:20:45,936 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) [2022-03-19 02:20:45,944 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-03-19 02:20:46,070 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-19 02:20:46,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:20:46,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-19 02:20:46,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:20:46,379 INFO L134 CoverageAnalysis]: Checked inductivity of 1254 backedges. 73 proven. 1 refuted. 0 times theorem prover too weak. 1180 trivial. 0 not checked. [2022-03-19 02:20:46,379 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:20:46,654 INFO L134 CoverageAnalysis]: Checked inductivity of 1254 backedges. 73 proven. 1 refuted. 0 times theorem prover too weak. 1180 trivial. 0 not checked. [2022-03-19 02:20:46,654 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [619949266] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:20:46,654 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:20:46,654 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 7, 7] total 32 [2022-03-19 02:20:46,655 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:20:46,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2111817591] [2022-03-19 02:20:46,655 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2111817591] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:20:46,655 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:20:46,655 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-03-19 02:20:46,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824113195] [2022-03-19 02:20:46,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:20:46,655 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-19 02:20:46,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:20:46,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-19 02:20:46,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=260, Invalid=732, Unknown=0, NotChecked=0, Total=992 [2022-03-19 02:20:46,657 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) [2022-03-19 02:20:47,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:20:47,851 INFO L93 Difference]: Finished difference Result 936 states and 1363 transitions. [2022-03-19 02:20:47,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-19 02:20:47,851 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 [2022-03-19 02:20:47,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:20:47,856 INFO L225 Difference]: With dead ends: 936 [2022-03-19 02:20:47,856 INFO L226 Difference]: Without dead ends: 518 [2022-03-19 02:20:47,858 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 358 GetRequests, 305 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 468 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=769, Invalid=2093, Unknown=0, NotChecked=0, Total=2862 [2022-03-19 02:20:47,859 INFO L912 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 [2022-03-19 02:20:47,859 INFO L913 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] [2022-03-19 02:20:47,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2022-03-19 02:20:47,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 486. [2022-03-19 02:20:47,951 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) [2022-03-19 02:20:47,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 486 states to 486 states and 687 transitions. [2022-03-19 02:20:47,953 INFO L78 Accepts]: Start accepts. Automaton has 486 states and 687 transitions. Word has length 155 [2022-03-19 02:20:47,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:20:47,953 INFO L478 AbstractCegarLoop]: Abstraction has 486 states and 687 transitions. [2022-03-19 02:20:47,953 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) [2022-03-19 02:20:47,953 INFO L276 IsEmpty]: Start isEmpty. Operand 486 states and 687 transitions. [2022-03-19 02:20:47,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2022-03-19 02:20:47,955 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:20:47,956 INFO L500 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] [2022-03-19 02:20:47,982 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-03-19 02:20:48,171 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 [2022-03-19 02:20:48,171 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:20:48,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:20:48,172 INFO L85 PathProgramCache]: Analyzing trace with hash -148049653, now seen corresponding path program 37 times [2022-03-19 02:20:48,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:20:48,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1744315927] [2022-03-19 02:20:48,173 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:20:48,173 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:20:48,173 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:20:48,173 INFO L85 PathProgramCache]: Analyzing trace with hash -148049653, now seen corresponding path program 38 times [2022-03-19 02:20:48,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:20:48,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520698933] [2022-03-19 02:20:48,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:20:48,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:20:48,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:20:48,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:20:48,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:20:48,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2022-03-19 02:20:48,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:20:48,460 INFO L134 CoverageAnalysis]: Checked inductivity of 1390 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 990 trivial. 0 not checked. [2022-03-19 02:20:48,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:20:48,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520698933] [2022-03-19 02:20:48,461 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520698933] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:20:48,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327049777] [2022-03-19 02:20:48,461 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 02:20:48,461 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:20:48,462 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:20:48,464 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) [2022-03-19 02:20:48,492 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-03-19 02:20:48,645 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 02:20:48,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:20:48,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 630 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-19 02:20:48,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:20:48,848 INFO L134 CoverageAnalysis]: Checked inductivity of 1390 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 990 trivial. 0 not checked. [2022-03-19 02:20:48,849 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:20:49,550 INFO L134 CoverageAnalysis]: Checked inductivity of 1390 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 990 trivial. 0 not checked. [2022-03-19 02:20:49,551 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [327049777] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:20:49,551 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:20:49,551 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 23, 23] total 47 [2022-03-19 02:20:49,551 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:20:49,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1744315927] [2022-03-19 02:20:49,551 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1744315927] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:20:49,551 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:20:49,551 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-03-19 02:20:49,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76248493] [2022-03-19 02:20:49,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:20:49,552 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-19 02:20:49,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:20:49,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-19 02:20:49,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=994, Invalid=1168, Unknown=0, NotChecked=0, Total=2162 [2022-03-19 02:20:49,553 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) [2022-03-19 02:20:50,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:20:50,808 INFO L93 Difference]: Finished difference Result 980 states and 1428 transitions. [2022-03-19 02:20:50,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-19 02:20:50,808 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 [2022-03-19 02:20:50,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:20:50,810 INFO L225 Difference]: With dead ends: 980 [2022-03-19 02:20:50,810 INFO L226 Difference]: Without dead ends: 541 [2022-03-19 02:20:50,813 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 374 GetRequests, 306 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 412 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=2013, Invalid=2817, Unknown=0, NotChecked=0, Total=4830 [2022-03-19 02:20:50,817 INFO L912 BasicCegarLoop]: 43 mSDtfsCounter, 1164 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 1204 mSolverCounterSat, 478 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s 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 [2022-03-19 02:20:50,818 INFO L913 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] [2022-03-19 02:20:50,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 541 states. [2022-03-19 02:20:50,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 541 to 509. [2022-03-19 02:20:50,920 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) [2022-03-19 02:20:50,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 509 states to 509 states and 720 transitions. [2022-03-19 02:20:50,922 INFO L78 Accepts]: Start accepts. Automaton has 509 states and 720 transitions. Word has length 162 [2022-03-19 02:20:50,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:20:50,922 INFO L478 AbstractCegarLoop]: Abstraction has 509 states and 720 transitions. [2022-03-19 02:20:50,922 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) [2022-03-19 02:20:50,922 INFO L276 IsEmpty]: Start isEmpty. Operand 509 states and 720 transitions. [2022-03-19 02:20:50,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2022-03-19 02:20:50,925 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:20:50,925 INFO L500 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] [2022-03-19 02:20:50,951 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-03-19 02:20:51,147 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 [2022-03-19 02:20:51,148 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:20:51,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:20:51,148 INFO L85 PathProgramCache]: Analyzing trace with hash 491700577, now seen corresponding path program 39 times [2022-03-19 02:20:51,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:20:51,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1742118166] [2022-03-19 02:20:51,149 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:20:51,149 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:20:51,150 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:20:51,150 INFO L85 PathProgramCache]: Analyzing trace with hash 491700577, now seen corresponding path program 40 times [2022-03-19 02:20:51,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:20:51,150 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025940637] [2022-03-19 02:20:51,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:20:51,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:20:51,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:20:51,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:20:51,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:20:51,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 154 [2022-03-19 02:20:51,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:20:51,447 INFO L134 CoverageAnalysis]: Checked inductivity of 1533 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 1092 trivial. 0 not checked. [2022-03-19 02:20:51,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:20:51,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025940637] [2022-03-19 02:20:51,447 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025940637] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:20:51,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335124902] [2022-03-19 02:20:51,448 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 02:20:51,448 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:20:51,448 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:20:51,449 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) [2022-03-19 02:20:51,449 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-03-19 02:20:51,611 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 02:20:51,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:20:51,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 656 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-19 02:20:51,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:20:51,820 INFO L134 CoverageAnalysis]: Checked inductivity of 1533 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 1092 trivial. 0 not checked. [2022-03-19 02:20:51,820 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:20:52,539 INFO L134 CoverageAnalysis]: Checked inductivity of 1533 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 1092 trivial. 0 not checked. [2022-03-19 02:20:52,539 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1335124902] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:20:52,539 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:20:52,540 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 24, 24] total 49 [2022-03-19 02:20:52,540 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:20:52,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1742118166] [2022-03-19 02:20:52,540 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1742118166] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:20:52,540 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:20:52,540 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-03-19 02:20:52,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558529715] [2022-03-19 02:20:52,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:20:52,540 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-19 02:20:52,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:20:52,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-19 02:20:52,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1085, Invalid=1267, Unknown=0, NotChecked=0, Total=2352 [2022-03-19 02:20:52,541 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) [2022-03-19 02:20:53,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:20:53,833 INFO L93 Difference]: Finished difference Result 1024 states and 1493 transitions. [2022-03-19 02:20:53,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-19 02:20:53,833 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 [2022-03-19 02:20:53,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:20:53,836 INFO L225 Difference]: With dead ends: 1024 [2022-03-19 02:20:53,836 INFO L226 Difference]: Without dead ends: 564 [2022-03-19 02:20:53,838 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 390 GetRequests, 319 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 443 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=2196, Invalid=3060, Unknown=0, NotChecked=0, Total=5256 [2022-03-19 02:20:53,838 INFO L912 BasicCegarLoop]: 43 mSDtfsCounter, 1366 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 1189 mSolverCounterSat, 567 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s 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, 0.8s IncrementalHoareTripleChecker+Time [2022-03-19 02:20:53,839 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [1370 Valid, 51 Invalid, 1756 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [567 Valid, 1189 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-19 02:20:53,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2022-03-19 02:20:53,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 532. [2022-03-19 02:20:53,969 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) [2022-03-19 02:20:53,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 532 states to 532 states and 753 transitions. [2022-03-19 02:20:53,971 INFO L78 Accepts]: Start accepts. Automaton has 532 states and 753 transitions. Word has length 169 [2022-03-19 02:20:53,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:20:53,971 INFO L478 AbstractCegarLoop]: Abstraction has 532 states and 753 transitions. [2022-03-19 02:20:53,971 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) [2022-03-19 02:20:53,971 INFO L276 IsEmpty]: Start isEmpty. Operand 532 states and 753 transitions. [2022-03-19 02:20:53,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2022-03-19 02:20:53,973 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:20:53,973 INFO L500 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] [2022-03-19 02:20:53,998 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-03-19 02:20:54,197 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 [2022-03-19 02:20:54,198 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:20:54,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:20:54,198 INFO L85 PathProgramCache]: Analyzing trace with hash 1540862927, now seen corresponding path program 41 times [2022-03-19 02:20:54,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:20:54,198 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [121144448] [2022-03-19 02:20:54,199 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:20:54,199 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:20:54,200 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:20:54,200 INFO L85 PathProgramCache]: Analyzing trace with hash 1540862927, now seen corresponding path program 42 times [2022-03-19 02:20:54,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:20:54,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502853491] [2022-03-19 02:20:54,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:20:54,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:20:54,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:20:54,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:20:54,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:20:54,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 161 [2022-03-19 02:20:54,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:20:54,532 INFO L134 CoverageAnalysis]: Checked inductivity of 1683 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 1199 trivial. 0 not checked. [2022-03-19 02:20:54,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:20:54,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502853491] [2022-03-19 02:20:54,533 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502853491] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:20:54,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577749519] [2022-03-19 02:20:54,533 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 02:20:54,533 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:20:54,533 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:20:54,537 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) [2022-03-19 02:20:54,538 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-03-19 02:20:54,681 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-19 02:20:54,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:20:54,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-19 02:20:54,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:20:54,965 INFO L134 CoverageAnalysis]: Checked inductivity of 1683 backedges. 85 proven. 1 refuted. 0 times theorem prover too weak. 1597 trivial. 0 not checked. [2022-03-19 02:20:54,965 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:20:55,269 INFO L134 CoverageAnalysis]: Checked inductivity of 1683 backedges. 85 proven. 1 refuted. 0 times theorem prover too weak. 1597 trivial. 0 not checked. [2022-03-19 02:20:55,269 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1577749519] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:20:55,270 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:20:55,270 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 7, 7] total 35 [2022-03-19 02:20:55,271 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:20:55,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [121144448] [2022-03-19 02:20:55,271 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [121144448] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:20:55,271 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:20:55,272 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-03-19 02:20:55,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411365441] [2022-03-19 02:20:55,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:20:55,272 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-19 02:20:55,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:20:55,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-19 02:20:55,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=861, Unknown=0, NotChecked=0, Total=1190 [2022-03-19 02:20:55,273 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) [2022-03-19 02:20:56,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:20:56,712 INFO L93 Difference]: Finished difference Result 1068 states and 1558 transitions. [2022-03-19 02:20:56,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-19 02:20:56,713 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 [2022-03-19 02:20:56,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:20:56,715 INFO L225 Difference]: With dead ends: 1068 [2022-03-19 02:20:56,715 INFO L226 Difference]: Without dead ends: 587 [2022-03-19 02:20:56,718 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 406 GetRequests, 347 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 573 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=982, Invalid=2558, Unknown=0, NotChecked=0, Total=3540 [2022-03-19 02:20:56,719 INFO L912 BasicCegarLoop]: 43 mSDtfsCounter, 1428 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 1199 mSolverCounterSat, 594 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s 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, 0.9s IncrementalHoareTripleChecker+Time [2022-03-19 02:20:56,719 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [1432 Valid, 47 Invalid, 1793 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [594 Valid, 1199 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-19 02:20:56,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 587 states. [2022-03-19 02:20:56,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 587 to 555. [2022-03-19 02:20:56,869 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) [2022-03-19 02:20:56,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 555 states to 555 states and 786 transitions. [2022-03-19 02:20:56,871 INFO L78 Accepts]: Start accepts. Automaton has 555 states and 786 transitions. Word has length 176 [2022-03-19 02:20:56,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:20:56,872 INFO L478 AbstractCegarLoop]: Abstraction has 555 states and 786 transitions. [2022-03-19 02:20:56,872 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) [2022-03-19 02:20:56,872 INFO L276 IsEmpty]: Start isEmpty. Operand 555 states and 786 transitions. [2022-03-19 02:20:56,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2022-03-19 02:20:56,874 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:20:56,875 INFO L500 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] [2022-03-19 02:20:56,899 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-03-19 02:20:57,087 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 [2022-03-19 02:20:57,087 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:20:57,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:20:57,088 INFO L85 PathProgramCache]: Analyzing trace with hash 1753296029, now seen corresponding path program 43 times [2022-03-19 02:20:57,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:20:57,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1713045120] [2022-03-19 02:20:57,089 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:20:57,089 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:20:57,089 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:20:57,090 INFO L85 PathProgramCache]: Analyzing trace with hash 1753296029, now seen corresponding path program 44 times [2022-03-19 02:20:57,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:20:57,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419280985] [2022-03-19 02:20:57,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:20:57,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:20:57,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:20:57,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:20:57,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:20:57,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 168 [2022-03-19 02:20:57,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:20:57,442 INFO L134 CoverageAnalysis]: Checked inductivity of 1840 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 1311 trivial. 0 not checked. [2022-03-19 02:20:57,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:20:57,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419280985] [2022-03-19 02:20:57,442 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1419280985] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:20:57,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [514480455] [2022-03-19 02:20:57,442 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 02:20:57,442 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:20:57,442 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:20:57,443 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) [2022-03-19 02:20:57,444 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-03-19 02:20:57,654 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 02:20:57,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:20:57,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 708 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-19 02:20:57,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:20:57,933 INFO L134 CoverageAnalysis]: Checked inductivity of 1840 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 1311 trivial. 0 not checked. [2022-03-19 02:20:57,933 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:20:58,795 INFO L134 CoverageAnalysis]: Checked inductivity of 1840 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 1311 trivial. 0 not checked. [2022-03-19 02:20:58,795 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [514480455] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:20:58,795 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:20:58,795 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 26, 26] total 53 [2022-03-19 02:20:58,796 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:20:58,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1713045120] [2022-03-19 02:20:58,796 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1713045120] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:20:58,796 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:20:58,796 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-03-19 02:20:58,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480968259] [2022-03-19 02:20:58,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:20:58,796 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-19 02:20:58,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:20:58,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-19 02:20:58,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1279, Invalid=1477, Unknown=0, NotChecked=0, Total=2756 [2022-03-19 02:20:58,798 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) [2022-03-19 02:21:00,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:21:00,230 INFO L93 Difference]: Finished difference Result 1112 states and 1623 transitions. [2022-03-19 02:21:00,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-19 02:21:00,231 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 [2022-03-19 02:21:00,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:21:00,233 INFO L225 Difference]: With dead ends: 1112 [2022-03-19 02:21:00,233 INFO L226 Difference]: Without dead ends: 610 [2022-03-19 02:21:00,235 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 422 GetRequests, 345 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 508 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2586, Invalid=3576, Unknown=0, NotChecked=0, Total=6162 [2022-03-19 02:21:00,235 INFO L912 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 [2022-03-19 02:21:00,236 INFO L913 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] [2022-03-19 02:21:00,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 610 states. [2022-03-19 02:21:00,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 610 to 578. [2022-03-19 02:21:00,391 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) [2022-03-19 02:21:00,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 578 states to 578 states and 819 transitions. [2022-03-19 02:21:00,392 INFO L78 Accepts]: Start accepts. Automaton has 578 states and 819 transitions. Word has length 183 [2022-03-19 02:21:00,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:21:00,393 INFO L478 AbstractCegarLoop]: Abstraction has 578 states and 819 transitions. [2022-03-19 02:21:00,393 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) [2022-03-19 02:21:00,393 INFO L276 IsEmpty]: Start isEmpty. Operand 578 states and 819 transitions. [2022-03-19 02:21:00,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2022-03-19 02:21:00,395 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:21:00,395 INFO L500 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] [2022-03-19 02:21:00,419 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-03-19 02:21:00,613 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 [2022-03-19 02:21:00,613 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:21:00,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:21:00,613 INFO L85 PathProgramCache]: Analyzing trace with hash 788523667, now seen corresponding path program 45 times [2022-03-19 02:21:00,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:21:00,613 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1794173135] [2022-03-19 02:21:00,615 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:21:00,615 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:21:00,615 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:21:00,615 INFO L85 PathProgramCache]: Analyzing trace with hash 788523667, now seen corresponding path program 46 times [2022-03-19 02:21:00,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:21:00,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899800978] [2022-03-19 02:21:00,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:21:00,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:21:00,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:21:00,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:21:00,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:21:00,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2022-03-19 02:21:00,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:21:00,976 INFO L134 CoverageAnalysis]: Checked inductivity of 2004 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 1428 trivial. 0 not checked. [2022-03-19 02:21:00,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:21:00,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899800978] [2022-03-19 02:21:00,977 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899800978] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:21:00,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962015416] [2022-03-19 02:21:00,977 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 02:21:00,977 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:21:00,977 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:21:00,978 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) [2022-03-19 02:21:00,980 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-03-19 02:21:01,214 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 02:21:01,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:21:01,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 734 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-19 02:21:01,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:21:01,465 INFO L134 CoverageAnalysis]: Checked inductivity of 2004 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 1428 trivial. 0 not checked. [2022-03-19 02:21:01,466 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:21:02,370 INFO L134 CoverageAnalysis]: Checked inductivity of 2004 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 1428 trivial. 0 not checked. [2022-03-19 02:21:02,371 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1962015416] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:21:02,371 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:21:02,371 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 27, 27] total 55 [2022-03-19 02:21:02,371 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:21:02,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1794173135] [2022-03-19 02:21:02,371 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1794173135] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:21:02,371 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:21:02,371 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-03-19 02:21:02,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051204217] [2022-03-19 02:21:02,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:21:02,372 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-19 02:21:02,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:21:02,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-19 02:21:02,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1382, Invalid=1588, Unknown=0, NotChecked=0, Total=2970 [2022-03-19 02:21:02,373 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) [2022-03-19 02:21:03,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:21:03,872 INFO L93 Difference]: Finished difference Result 1156 states and 1688 transitions. [2022-03-19 02:21:03,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-19 02:21:03,872 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 [2022-03-19 02:21:03,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:21:03,874 INFO L225 Difference]: With dead ends: 1156 [2022-03-19 02:21:03,874 INFO L226 Difference]: Without dead ends: 633 [2022-03-19 02:21:03,876 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 438 GetRequests, 358 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 542 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2793, Invalid=3849, Unknown=0, NotChecked=0, Total=6642 [2022-03-19 02:21:03,876 INFO L912 BasicCegarLoop]: 43 mSDtfsCounter, 1428 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 1345 mSolverCounterSat, 625 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s 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, 0.9s IncrementalHoareTripleChecker+Time [2022-03-19 02:21:03,879 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [1432 Valid, 49 Invalid, 1970 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [625 Valid, 1345 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-19 02:21:03,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 633 states. [2022-03-19 02:21:04,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 633 to 601. [2022-03-19 02:21:04,002 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) [2022-03-19 02:21:04,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 601 states to 601 states and 852 transitions. [2022-03-19 02:21:04,004 INFO L78 Accepts]: Start accepts. Automaton has 601 states and 852 transitions. Word has length 190 [2022-03-19 02:21:04,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:21:04,004 INFO L478 AbstractCegarLoop]: Abstraction has 601 states and 852 transitions. [2022-03-19 02:21:04,004 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) [2022-03-19 02:21:04,004 INFO L276 IsEmpty]: Start isEmpty. Operand 601 states and 852 transitions. [2022-03-19 02:21:04,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2022-03-19 02:21:04,006 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:21:04,006 INFO L500 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] [2022-03-19 02:21:04,031 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-03-19 02:21:04,230 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 [2022-03-19 02:21:04,230 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:21:04,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:21:04,231 INFO L85 PathProgramCache]: Analyzing trace with hash -543783975, now seen corresponding path program 47 times [2022-03-19 02:21:04,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:21:04,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [501244678] [2022-03-19 02:21:04,232 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:21:04,232 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:21:04,232 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:21:04,232 INFO L85 PathProgramCache]: Analyzing trace with hash -543783975, now seen corresponding path program 48 times [2022-03-19 02:21:04,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:21:04,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331100194] [2022-03-19 02:21:04,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:21:04,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:21:04,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:21:04,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:21:04,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:21:04,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 182 [2022-03-19 02:21:04,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:21:04,625 INFO L134 CoverageAnalysis]: Checked inductivity of 2175 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 1550 trivial. 0 not checked. [2022-03-19 02:21:04,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:21:04,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331100194] [2022-03-19 02:21:04,625 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331100194] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:21:04,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940513275] [2022-03-19 02:21:04,625 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 02:21:04,625 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:21:04,626 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:21:04,627 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) [2022-03-19 02:21:04,628 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-03-19 02:21:04,779 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-19 02:21:04,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:21:04,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-19 02:21:04,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:21:05,169 INFO L134 CoverageAnalysis]: Checked inductivity of 2175 backedges. 97 proven. 1 refuted. 0 times theorem prover too weak. 2077 trivial. 0 not checked. [2022-03-19 02:21:05,169 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:21:05,481 INFO L134 CoverageAnalysis]: Checked inductivity of 2175 backedges. 97 proven. 1 refuted. 0 times theorem prover too weak. 2077 trivial. 0 not checked. [2022-03-19 02:21:05,481 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [940513275] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:21:05,481 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:21:05,481 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 7, 7] total 38 [2022-03-19 02:21:05,481 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:21:05,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [501244678] [2022-03-19 02:21:05,482 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [501244678] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:21:05,482 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:21:05,482 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-03-19 02:21:05,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616705493] [2022-03-19 02:21:05,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:21:05,482 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-19 02:21:05,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:21:05,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-19 02:21:05,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=407, Invalid=999, Unknown=0, NotChecked=0, Total=1406 [2022-03-19 02:21:05,483 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) [2022-03-19 02:21:07,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:21:07,091 INFO L93 Difference]: Finished difference Result 1200 states and 1753 transitions. [2022-03-19 02:21:07,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-19 02:21:07,092 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 [2022-03-19 02:21:07,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:21:07,094 INFO L225 Difference]: With dead ends: 1200 [2022-03-19 02:21:07,095 INFO L226 Difference]: Without dead ends: 656 [2022-03-19 02:21:07,096 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 454 GetRequests, 389 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 687 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1222, Invalid=3068, Unknown=0, NotChecked=0, Total=4290 [2022-03-19 02:21:07,097 INFO L912 BasicCegarLoop]: 43 mSDtfsCounter, 1545 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 1390 mSolverCounterSat, 620 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s 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 [2022-03-19 02:21:07,097 INFO L913 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] [2022-03-19 02:21:07,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 656 states. [2022-03-19 02:21:07,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 656 to 624. [2022-03-19 02:21:07,274 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) [2022-03-19 02:21:07,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 624 states to 624 states and 885 transitions. [2022-03-19 02:21:07,275 INFO L78 Accepts]: Start accepts. Automaton has 624 states and 885 transitions. Word has length 197 [2022-03-19 02:21:07,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:21:07,275 INFO L478 AbstractCegarLoop]: Abstraction has 624 states and 885 transitions. [2022-03-19 02:21:07,275 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) [2022-03-19 02:21:07,275 INFO L276 IsEmpty]: Start isEmpty. Operand 624 states and 885 transitions. [2022-03-19 02:21:07,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2022-03-19 02:21:07,277 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:21:07,277 INFO L500 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] [2022-03-19 02:21:07,294 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-03-19 02:21:07,478 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 [2022-03-19 02:21:07,478 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:21:07,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:21:07,479 INFO L85 PathProgramCache]: Analyzing trace with hash 1485100375, now seen corresponding path program 49 times [2022-03-19 02:21:07,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:21:07,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [338240939] [2022-03-19 02:21:07,480 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:21:07,480 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:21:07,481 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:21:07,481 INFO L85 PathProgramCache]: Analyzing trace with hash 1485100375, now seen corresponding path program 50 times [2022-03-19 02:21:07,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:21:07,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789252187] [2022-03-19 02:21:07,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:21:07,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:21:07,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:21:07,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:21:07,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:21:07,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 189 [2022-03-19 02:21:07,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:21:07,889 INFO L134 CoverageAnalysis]: Checked inductivity of 2353 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 1677 trivial. 0 not checked. [2022-03-19 02:21:07,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:21:07,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789252187] [2022-03-19 02:21:07,889 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789252187] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:21:07,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383290064] [2022-03-19 02:21:07,889 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 02:21:07,889 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:21:07,889 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:21:07,890 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) [2022-03-19 02:21:07,891 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-03-19 02:21:08,094 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 02:21:08,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:21:08,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 786 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-19 02:21:08,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:21:08,354 INFO L134 CoverageAnalysis]: Checked inductivity of 2353 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 1677 trivial. 0 not checked. [2022-03-19 02:21:08,355 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:21:09,342 INFO L134 CoverageAnalysis]: Checked inductivity of 2353 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 1677 trivial. 0 not checked. [2022-03-19 02:21:09,342 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [383290064] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:21:09,342 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:21:09,342 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 29, 29] total 59 [2022-03-19 02:21:09,343 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:21:09,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [338240939] [2022-03-19 02:21:09,343 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [338240939] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:21:09,343 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:21:09,343 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-03-19 02:21:09,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414769277] [2022-03-19 02:21:09,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:21:09,343 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-19 02:21:09,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:21:09,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-19 02:21:09,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1600, Invalid=1822, Unknown=0, NotChecked=0, Total=3422 [2022-03-19 02:21:09,344 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) [2022-03-19 02:21:10,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:21:10,957 INFO L93 Difference]: Finished difference Result 1244 states and 1818 transitions. [2022-03-19 02:21:10,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-19 02:21:10,958 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 [2022-03-19 02:21:10,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:21:10,961 INFO L225 Difference]: With dead ends: 1244 [2022-03-19 02:21:10,961 INFO L226 Difference]: Without dead ends: 679 [2022-03-19 02:21:10,963 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 470 GetRequests, 384 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 613 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=3231, Invalid=4425, Unknown=0, NotChecked=0, Total=7656 [2022-03-19 02:21:10,968 INFO L912 BasicCegarLoop]: 43 mSDtfsCounter, 1678 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 1367 mSolverCounterSat, 682 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s 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, 0.9s IncrementalHoareTripleChecker+Time [2022-03-19 02:21:10,968 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [1682 Valid, 47 Invalid, 2049 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [682 Valid, 1367 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-19 02:21:10,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 679 states. [2022-03-19 02:21:11,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 679 to 647. [2022-03-19 02:21:11,141 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) [2022-03-19 02:21:11,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 647 states to 647 states and 918 transitions. [2022-03-19 02:21:11,143 INFO L78 Accepts]: Start accepts. Automaton has 647 states and 918 transitions. Word has length 204 [2022-03-19 02:21:11,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:21:11,143 INFO L478 AbstractCegarLoop]: Abstraction has 647 states and 918 transitions. [2022-03-19 02:21:11,143 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) [2022-03-19 02:21:11,143 INFO L276 IsEmpty]: Start isEmpty. Operand 647 states and 918 transitions. [2022-03-19 02:21:11,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2022-03-19 02:21:11,146 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:21:11,146 INFO L500 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] [2022-03-19 02:21:11,171 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-03-19 02:21:11,359 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 [2022-03-19 02:21:11,359 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:21:11,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:21:11,360 INFO L85 PathProgramCache]: Analyzing trace with hash -319846635, now seen corresponding path program 51 times [2022-03-19 02:21:11,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:21:11,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2061838914] [2022-03-19 02:21:11,361 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:21:11,361 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:21:11,361 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:21:11,361 INFO L85 PathProgramCache]: Analyzing trace with hash -319846635, now seen corresponding path program 52 times [2022-03-19 02:21:11,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:21:11,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123779349] [2022-03-19 02:21:11,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:21:11,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:21:11,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:21:11,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:21:11,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:21:11,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 196 [2022-03-19 02:21:11,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:21:11,770 INFO L134 CoverageAnalysis]: Checked inductivity of 2538 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 1809 trivial. 0 not checked. [2022-03-19 02:21:11,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:21:11,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123779349] [2022-03-19 02:21:11,770 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123779349] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:21:11,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1504421609] [2022-03-19 02:21:11,770 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 02:21:11,770 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:21:11,771 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:21:11,772 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) [2022-03-19 02:21:11,773 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-03-19 02:21:12,004 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 02:21:12,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:21:12,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 812 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-19 02:21:12,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:21:12,316 INFO L134 CoverageAnalysis]: Checked inductivity of 2538 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 1809 trivial. 0 not checked. [2022-03-19 02:21:12,317 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:21:13,376 INFO L134 CoverageAnalysis]: Checked inductivity of 2538 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 1809 trivial. 0 not checked. [2022-03-19 02:21:13,377 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1504421609] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:21:13,377 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:21:13,377 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 30, 30] total 61 [2022-03-19 02:21:13,377 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:21:13,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2061838914] [2022-03-19 02:21:13,377 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2061838914] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:21:13,377 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:21:13,377 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-03-19 02:21:13,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595953779] [2022-03-19 02:21:13,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:21:13,378 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-19 02:21:13,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:21:13,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-19 02:21:13,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1715, Invalid=1945, Unknown=0, NotChecked=0, Total=3660 [2022-03-19 02:21:13,379 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) [2022-03-19 02:21:15,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:21:15,151 INFO L93 Difference]: Finished difference Result 1288 states and 1883 transitions. [2022-03-19 02:21:15,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-19 02:21:15,152 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 [2022-03-19 02:21:15,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:21:15,154 INFO L225 Difference]: With dead ends: 1288 [2022-03-19 02:21:15,154 INFO L226 Difference]: Without dead ends: 702 [2022-03-19 02:21:15,156 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 486 GetRequests, 397 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 650 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=3462, Invalid=4728, Unknown=0, NotChecked=0, Total=8190 [2022-03-19 02:21:15,156 INFO L912 BasicCegarLoop]: 43 mSDtfsCounter, 1581 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 1762 mSolverCounterSat, 675 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s 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, 1.0s IncrementalHoareTripleChecker+Time [2022-03-19 02:21:15,156 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [1585 Valid, 51 Invalid, 2437 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [675 Valid, 1762 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-19 02:21:15,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 702 states. [2022-03-19 02:21:15,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 702 to 670. [2022-03-19 02:21:15,378 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) [2022-03-19 02:21:15,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 670 states to 670 states and 951 transitions. [2022-03-19 02:21:15,379 INFO L78 Accepts]: Start accepts. Automaton has 670 states and 951 transitions. Word has length 211 [2022-03-19 02:21:15,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:21:15,379 INFO L478 AbstractCegarLoop]: Abstraction has 670 states and 951 transitions. [2022-03-19 02:21:15,380 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) [2022-03-19 02:21:15,380 INFO L276 IsEmpty]: Start isEmpty. Operand 670 states and 951 transitions. [2022-03-19 02:21:15,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2022-03-19 02:21:15,382 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:21:15,382 INFO L500 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] [2022-03-19 02:21:15,409 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-03-19 02:21:15,606 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 [2022-03-19 02:21:15,606 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:21:15,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:21:15,607 INFO L85 PathProgramCache]: Analyzing trace with hash -993676261, now seen corresponding path program 53 times [2022-03-19 02:21:15,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:21:15,607 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [290914895] [2022-03-19 02:21:15,608 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:21:15,608 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:21:15,608 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:21:15,608 INFO L85 PathProgramCache]: Analyzing trace with hash -993676261, now seen corresponding path program 54 times [2022-03-19 02:21:15,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:21:15,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401901390] [2022-03-19 02:21:15,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:21:15,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:21:15,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:21:16,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:21:16,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:21:16,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 203 [2022-03-19 02:21:16,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:21:16,073 INFO L134 CoverageAnalysis]: Checked inductivity of 2730 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 1946 trivial. 0 not checked. [2022-03-19 02:21:16,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:21:16,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401901390] [2022-03-19 02:21:16,073 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401901390] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:21:16,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799985242] [2022-03-19 02:21:16,073 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 02:21:16,073 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:21:16,074 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:21:16,076 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) [2022-03-19 02:21:16,103 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-03-19 02:21:16,288 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-19 02:21:16,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:21:16,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-19 02:21:16,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:21:16,636 INFO L134 CoverageAnalysis]: Checked inductivity of 2730 backedges. 109 proven. 1 refuted. 0 times theorem prover too weak. 2620 trivial. 0 not checked. [2022-03-19 02:21:16,636 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:21:16,963 INFO L134 CoverageAnalysis]: Checked inductivity of 2730 backedges. 109 proven. 1 refuted. 0 times theorem prover too weak. 2620 trivial. 0 not checked. [2022-03-19 02:21:16,963 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1799985242] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:21:16,964 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:21:16,964 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 7, 7] total 41 [2022-03-19 02:21:16,964 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:21:16,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [290914895] [2022-03-19 02:21:16,964 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [290914895] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:21:16,964 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:21:16,964 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-03-19 02:21:16,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632028998] [2022-03-19 02:21:16,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:21:16,964 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-19 02:21:16,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:21:16,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-19 02:21:16,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=494, Invalid=1146, Unknown=0, NotChecked=0, Total=1640 [2022-03-19 02:21:16,965 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) [2022-03-19 02:21:18,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:21:18,805 INFO L93 Difference]: Finished difference Result 1332 states and 1948 transitions. [2022-03-19 02:21:18,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-19 02:21:18,805 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 [2022-03-19 02:21:18,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:21:18,808 INFO L225 Difference]: With dead ends: 1332 [2022-03-19 02:21:18,808 INFO L226 Difference]: Without dead ends: 725 [2022-03-19 02:21:18,809 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 502 GetRequests, 431 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 810 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1489, Invalid=3623, Unknown=0, NotChecked=0, Total=5112 [2022-03-19 02:21:18,810 INFO L912 BasicCegarLoop]: 43 mSDtfsCounter, 1726 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 1555 mSolverCounterSat, 769 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s 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, 1.1s IncrementalHoareTripleChecker+Time [2022-03-19 02:21:18,810 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [1730 Valid, 45 Invalid, 2324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [769 Valid, 1555 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-03-19 02:21:18,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 725 states. [2022-03-19 02:21:18,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 725 to 693. [2022-03-19 02:21:18,969 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) [2022-03-19 02:21:18,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 693 states to 693 states and 984 transitions. [2022-03-19 02:21:18,970 INFO L78 Accepts]: Start accepts. Automaton has 693 states and 984 transitions. Word has length 218 [2022-03-19 02:21:18,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:21:18,970 INFO L478 AbstractCegarLoop]: Abstraction has 693 states and 984 transitions. [2022-03-19 02:21:18,971 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) [2022-03-19 02:21:18,971 INFO L276 IsEmpty]: Start isEmpty. Operand 693 states and 984 transitions. [2022-03-19 02:21:18,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2022-03-19 02:21:18,973 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:21:18,973 INFO L500 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] [2022-03-19 02:21:18,991 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2022-03-19 02:21:19,175 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 [2022-03-19 02:21:19,176 INFO L403 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:21:19,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:21:19,176 INFO L85 PathProgramCache]: Analyzing trace with hash 611120721, now seen corresponding path program 55 times [2022-03-19 02:21:19,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:21:19,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [540429369] [2022-03-19 02:21:19,177 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:21:19,178 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:21:19,178 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:21:19,178 INFO L85 PathProgramCache]: Analyzing trace with hash 611120721, now seen corresponding path program 56 times [2022-03-19 02:21:19,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:21:19,178 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682646072] [2022-03-19 02:21:19,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:21:19,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:21:19,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:21:19,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:21:19,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:21:19,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 210 [2022-03-19 02:21:19,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:21:19,598 INFO L134 CoverageAnalysis]: Checked inductivity of 2929 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 2088 trivial. 0 not checked. [2022-03-19 02:21:19,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:21:19,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682646072] [2022-03-19 02:21:19,598 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682646072] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:21:19,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1576628817] [2022-03-19 02:21:19,598 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 02:21:19,598 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:21:19,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:21:19,599 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) [2022-03-19 02:21:19,600 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-03-19 02:21:19,844 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 02:21:19,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:21:19,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 864 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-19 02:21:19,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:21:20,131 INFO L134 CoverageAnalysis]: Checked inductivity of 2929 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 2088 trivial. 0 not checked. [2022-03-19 02:21:20,131 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:21:21,351 INFO L134 CoverageAnalysis]: Checked inductivity of 2929 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 2088 trivial. 0 not checked. [2022-03-19 02:21:21,352 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1576628817] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:21:21,352 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:21:21,352 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 32, 32] total 65 [2022-03-19 02:21:21,352 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:21:21,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [540429369] [2022-03-19 02:21:21,353 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [540429369] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:21:21,353 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:21:21,353 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-03-19 02:21:21,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255698307] [2022-03-19 02:21:21,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:21:21,354 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-03-19 02:21:21,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:21:21,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-03-19 02:21:21,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1957, Invalid=2203, Unknown=0, NotChecked=0, Total=4160 [2022-03-19 02:21:21,356 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) [2022-03-19 02:21:23,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:21:23,273 INFO L93 Difference]: Finished difference Result 1376 states and 2013 transitions. [2022-03-19 02:21:23,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-19 02:21:23,273 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 [2022-03-19 02:21:23,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:21:23,276 INFO L225 Difference]: With dead ends: 1376 [2022-03-19 02:21:23,276 INFO L226 Difference]: Without dead ends: 748 [2022-03-19 02:21:23,277 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 518 GetRequests, 423 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 727 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=3948, Invalid=5364, Unknown=0, NotChecked=0, Total=9312 [2022-03-19 02:21:23,278 INFO L912 BasicCegarLoop]: 43 mSDtfsCounter, 1750 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 1666 mSolverCounterSat, 793 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s 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, 1.1s IncrementalHoareTripleChecker+Time [2022-03-19 02:21:23,278 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [1754 Valid, 47 Invalid, 2459 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [793 Valid, 1666 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-03-19 02:21:23,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 748 states. [2022-03-19 02:21:23,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 748 to 716. [2022-03-19 02:21:23,506 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) [2022-03-19 02:21:23,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 716 states to 716 states and 1017 transitions. [2022-03-19 02:21:23,529 INFO L78 Accepts]: Start accepts. Automaton has 716 states and 1017 transitions. Word has length 225 [2022-03-19 02:21:23,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:21:23,529 INFO L478 AbstractCegarLoop]: Abstraction has 716 states and 1017 transitions. [2022-03-19 02:21:23,529 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) [2022-03-19 02:21:23,530 INFO L276 IsEmpty]: Start isEmpty. Operand 716 states and 1017 transitions. [2022-03-19 02:21:23,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2022-03-19 02:21:23,532 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:21:23,532 INFO L500 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] [2022-03-19 02:21:23,561 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-03-19 02:21:23,747 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 [2022-03-19 02:21:23,747 INFO L403 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:21:23,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:21:23,748 INFO L85 PathProgramCache]: Analyzing trace with hash 144819935, now seen corresponding path program 57 times [2022-03-19 02:21:23,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:21:23,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1186813397] [2022-03-19 02:21:23,749 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:21:23,749 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:21:23,750 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:21:23,750 INFO L85 PathProgramCache]: Analyzing trace with hash 144819935, now seen corresponding path program 58 times [2022-03-19 02:21:23,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:21:23,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955205135] [2022-03-19 02:21:23,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:21:23,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:21:23,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:21:24,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:21:24,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:21:24,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 217 [2022-03-19 02:21:24,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:21:24,258 INFO L134 CoverageAnalysis]: Checked inductivity of 3135 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 2235 trivial. 0 not checked. [2022-03-19 02:21:24,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:21:24,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955205135] [2022-03-19 02:21:24,259 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955205135] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:21:24,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [191423864] [2022-03-19 02:21:24,260 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 02:21:24,260 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:21:24,260 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:21:24,268 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) [2022-03-19 02:21:24,299 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-03-19 02:21:24,524 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 02:21:24,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:21:24,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 890 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-19 02:21:24,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:21:24,805 INFO L134 CoverageAnalysis]: Checked inductivity of 3135 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 2235 trivial. 0 not checked. [2022-03-19 02:21:24,805 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:21:26,055 INFO L134 CoverageAnalysis]: Checked inductivity of 3135 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 2235 trivial. 0 not checked. [2022-03-19 02:21:26,056 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [191423864] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:21:26,056 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:21:26,056 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 33, 33] total 67 [2022-03-19 02:21:26,056 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:21:26,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1186813397] [2022-03-19 02:21:26,057 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1186813397] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:21:26,057 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:21:26,057 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-03-19 02:21:26,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983534040] [2022-03-19 02:21:26,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:21:26,057 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-19 02:21:26,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:21:26,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-19 02:21:26,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2084, Invalid=2338, Unknown=0, NotChecked=0, Total=4422 [2022-03-19 02:21:26,059 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) [2022-03-19 02:21:28,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:21:28,196 INFO L93 Difference]: Finished difference Result 1420 states and 2078 transitions. [2022-03-19 02:21:28,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-03-19 02:21:28,197 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 [2022-03-19 02:21:28,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:21:28,200 INFO L225 Difference]: With dead ends: 1420 [2022-03-19 02:21:28,200 INFO L226 Difference]: Without dead ends: 771 [2022-03-19 02:21:28,202 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 534 GetRequests, 436 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 767 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=4203, Invalid=5697, Unknown=0, NotChecked=0, Total=9900 [2022-03-19 02:21:28,202 INFO L912 BasicCegarLoop]: 43 mSDtfsCounter, 1776 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 2009 mSolverCounterSat, 870 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s 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, 1.2s IncrementalHoareTripleChecker+Time [2022-03-19 02:21:28,203 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [1780 Valid, 49 Invalid, 2879 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [870 Valid, 2009 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-03-19 02:21:28,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 771 states. [2022-03-19 02:21:28,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 771 to 739. [2022-03-19 02:21:28,390 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) [2022-03-19 02:21:28,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 739 states to 739 states and 1050 transitions. [2022-03-19 02:21:28,391 INFO L78 Accepts]: Start accepts. Automaton has 739 states and 1050 transitions. Word has length 232 [2022-03-19 02:21:28,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:21:28,391 INFO L478 AbstractCegarLoop]: Abstraction has 739 states and 1050 transitions. [2022-03-19 02:21:28,391 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) [2022-03-19 02:21:28,391 INFO L276 IsEmpty]: Start isEmpty. Operand 739 states and 1050 transitions. [2022-03-19 02:21:28,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2022-03-19 02:21:28,393 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:21:28,393 INFO L500 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] [2022-03-19 02:21:28,412 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2022-03-19 02:21:28,594 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 [2022-03-19 02:21:28,594 INFO L403 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:21:28,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:21:28,594 INFO L85 PathProgramCache]: Analyzing trace with hash -1620078195, now seen corresponding path program 59 times [2022-03-19 02:21:28,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:21:28,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1341086917] [2022-03-19 02:21:28,596 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:21:28,596 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:21:28,596 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:21:28,596 INFO L85 PathProgramCache]: Analyzing trace with hash -1620078195, now seen corresponding path program 60 times [2022-03-19 02:21:28,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:21:28,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895320572] [2022-03-19 02:21:28,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:21:28,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:21:28,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:21:29,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:21:29,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:21:29,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 224 [2022-03-19 02:21:29,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:21:29,118 INFO L134 CoverageAnalysis]: Checked inductivity of 3348 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 2387 trivial. 0 not checked. [2022-03-19 02:21:29,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:21:29,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895320572] [2022-03-19 02:21:29,118 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895320572] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:21:29,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54119328] [2022-03-19 02:21:29,118 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 02:21:29,118 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:21:29,118 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:21:29,120 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) [2022-03-19 02:21:29,126 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-03-19 02:21:29,308 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-19 02:21:29,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:21:29,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-19 02:21:29,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:21:29,663 INFO L134 CoverageAnalysis]: Checked inductivity of 3348 backedges. 121 proven. 1 refuted. 0 times theorem prover too weak. 3226 trivial. 0 not checked. [2022-03-19 02:21:29,664 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:21:30,032 INFO L134 CoverageAnalysis]: Checked inductivity of 3348 backedges. 121 proven. 1 refuted. 0 times theorem prover too weak. 3226 trivial. 0 not checked. [2022-03-19 02:21:30,032 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [54119328] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:21:30,032 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:21:30,032 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 7, 7] total 44 [2022-03-19 02:21:30,033 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:21:30,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1341086917] [2022-03-19 02:21:30,033 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1341086917] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:21:30,033 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:21:30,033 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-03-19 02:21:30,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635568417] [2022-03-19 02:21:30,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:21:30,033 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-03-19 02:21:30,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:21:30,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-03-19 02:21:30,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=590, Invalid=1302, Unknown=0, NotChecked=0, Total=1892 [2022-03-19 02:21:30,035 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) [2022-03-19 02:21:32,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:21:32,198 INFO L93 Difference]: Finished difference Result 1464 states and 2143 transitions. [2022-03-19 02:21:32,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-19 02:21:32,198 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 [2022-03-19 02:21:32,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:21:32,202 INFO L225 Difference]: With dead ends: 1464 [2022-03-19 02:21:32,202 INFO L226 Difference]: Without dead ends: 794 [2022-03-19 02:21:32,203 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 550 GetRequests, 473 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 942 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1783, Invalid=4223, Unknown=0, NotChecked=0, Total=6006 [2022-03-19 02:21:32,203 INFO L912 BasicCegarLoop]: 43 mSDtfsCounter, 1851 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 1915 mSolverCounterSat, 804 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s 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, 1.2s IncrementalHoareTripleChecker+Time [2022-03-19 02:21:32,203 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [1855 Valid, 51 Invalid, 2719 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [804 Valid, 1915 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-03-19 02:21:32,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 794 states. [2022-03-19 02:21:32,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 794 to 762. [2022-03-19 02:21:32,397 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) [2022-03-19 02:21:32,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 762 states to 762 states and 1083 transitions. [2022-03-19 02:21:32,398 INFO L78 Accepts]: Start accepts. Automaton has 762 states and 1083 transitions. Word has length 239 [2022-03-19 02:21:32,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:21:32,399 INFO L478 AbstractCegarLoop]: Abstraction has 762 states and 1083 transitions. [2022-03-19 02:21:32,399 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) [2022-03-19 02:21:32,399 INFO L276 IsEmpty]: Start isEmpty. Operand 762 states and 1083 transitions. [2022-03-19 02:21:32,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2022-03-19 02:21:32,401 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:21:32,401 INFO L500 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] [2022-03-19 02:21:32,425 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-03-19 02:21:32,622 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 [2022-03-19 02:21:32,623 INFO L403 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:21:32,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:21:32,623 INFO L85 PathProgramCache]: Analyzing trace with hash 91770275, now seen corresponding path program 61 times [2022-03-19 02:21:32,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:21:32,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [451129740] [2022-03-19 02:21:32,625 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:21:32,625 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:21:32,625 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:21:32,625 INFO L85 PathProgramCache]: Analyzing trace with hash 91770275, now seen corresponding path program 62 times [2022-03-19 02:21:32,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:21:32,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983445212] [2022-03-19 02:21:32,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:21:32,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:21:32,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:21:33,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:21:33,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:21:33,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 231 [2022-03-19 02:21:33,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:21:33,153 INFO L134 CoverageAnalysis]: Checked inductivity of 3568 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 2544 trivial. 0 not checked. [2022-03-19 02:21:33,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:21:33,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983445212] [2022-03-19 02:21:33,153 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983445212] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:21:33,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456422372] [2022-03-19 02:21:33,154 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 02:21:33,154 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:21:33,154 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:21:33,160 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) [2022-03-19 02:21:33,161 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-03-19 02:21:33,429 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 02:21:33,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:21:33,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 942 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-19 02:21:33,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:21:33,747 INFO L134 CoverageAnalysis]: Checked inductivity of 3568 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 2544 trivial. 0 not checked. [2022-03-19 02:21:33,747 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:21:35,117 INFO L134 CoverageAnalysis]: Checked inductivity of 3568 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 2544 trivial. 0 not checked. [2022-03-19 02:21:35,117 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [456422372] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:21:35,117 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:21:35,117 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 35, 35] total 71 [2022-03-19 02:21:35,117 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:21:35,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [451129740] [2022-03-19 02:21:35,117 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [451129740] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:21:35,117 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:21:35,117 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-03-19 02:21:35,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894608143] [2022-03-19 02:21:35,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:21:35,118 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-03-19 02:21:35,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:21:35,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-03-19 02:21:35,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2350, Invalid=2620, Unknown=0, NotChecked=0, Total=4970 [2022-03-19 02:21:35,119 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) [2022-03-19 02:21:37,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:21:37,398 INFO L93 Difference]: Finished difference Result 1508 states and 2208 transitions. [2022-03-19 02:21:37,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-19 02:21:37,399 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 [2022-03-19 02:21:37,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:21:37,402 INFO L225 Difference]: With dead ends: 1508 [2022-03-19 02:21:37,402 INFO L226 Difference]: Without dead ends: 817 [2022-03-19 02:21:37,403 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 566 GetRequests, 462 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 850 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=4737, Invalid=6393, Unknown=0, NotChecked=0, Total=11130 [2022-03-19 02:21:37,403 INFO L912 BasicCegarLoop]: 43 mSDtfsCounter, 1897 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 1971 mSolverCounterSat, 865 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s 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, 1.3s IncrementalHoareTripleChecker+Time [2022-03-19 02:21:37,404 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [1901 Valid, 51 Invalid, 2836 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [865 Valid, 1971 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-03-19 02:21:37,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 817 states. [2022-03-19 02:21:37,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 817 to 785. [2022-03-19 02:21:37,618 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) [2022-03-19 02:21:37,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 785 states to 785 states and 1116 transitions. [2022-03-19 02:21:37,619 INFO L78 Accepts]: Start accepts. Automaton has 785 states and 1116 transitions. Word has length 246 [2022-03-19 02:21:37,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:21:37,619 INFO L478 AbstractCegarLoop]: Abstraction has 785 states and 1116 transitions. [2022-03-19 02:21:37,620 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) [2022-03-19 02:21:37,620 INFO L276 IsEmpty]: Start isEmpty. Operand 785 states and 1116 transitions. [2022-03-19 02:21:37,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2022-03-19 02:21:37,622 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:21:37,622 INFO L500 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] [2022-03-19 02:21:37,640 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2022-03-19 02:21:37,822 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 [2022-03-19 02:21:37,822 INFO L403 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:21:37,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:21:37,823 INFO L85 PathProgramCache]: Analyzing trace with hash 1490557129, now seen corresponding path program 63 times [2022-03-19 02:21:37,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:21:37,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2044581586] [2022-03-19 02:21:37,825 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:21:37,825 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:21:37,825 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:21:37,825 INFO L85 PathProgramCache]: Analyzing trace with hash 1490557129, now seen corresponding path program 64 times [2022-03-19 02:21:37,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:21:37,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298416522] [2022-03-19 02:21:37,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:21:37,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:21:37,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:21:38,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:21:38,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:21:38,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 238 [2022-03-19 02:21:38,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:21:38,432 INFO L134 CoverageAnalysis]: Checked inductivity of 3795 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 2706 trivial. 0 not checked. [2022-03-19 02:21:38,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:21:38,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298416522] [2022-03-19 02:21:38,433 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298416522] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:21:38,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [19401612] [2022-03-19 02:21:38,433 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 02:21:38,433 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:21:38,433 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:21:38,434 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) [2022-03-19 02:21:38,435 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-03-19 02:21:38,693 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 02:21:38,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:21:38,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 968 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-19 02:21:38,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:21:39,014 INFO L134 CoverageAnalysis]: Checked inductivity of 3795 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 2706 trivial. 0 not checked. [2022-03-19 02:21:39,015 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:21:40,443 INFO L134 CoverageAnalysis]: Checked inductivity of 3795 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 2706 trivial. 0 not checked. [2022-03-19 02:21:40,444 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [19401612] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:21:40,444 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:21:40,444 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 36, 36] total 73 [2022-03-19 02:21:40,444 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:21:40,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2044581586] [2022-03-19 02:21:40,444 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2044581586] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:21:40,444 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:21:40,444 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-03-19 02:21:40,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547348649] [2022-03-19 02:21:40,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:21:40,445 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-03-19 02:21:40,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:21:40,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-03-19 02:21:40,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2489, Invalid=2767, Unknown=0, NotChecked=0, Total=5256 [2022-03-19 02:21:40,446 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) [2022-03-19 02:21:42,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:21:42,840 INFO L93 Difference]: Finished difference Result 1552 states and 2273 transitions. [2022-03-19 02:21:42,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-19 02:21:42,842 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 [2022-03-19 02:21:42,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:21:42,845 INFO L225 Difference]: With dead ends: 1552 [2022-03-19 02:21:42,845 INFO L226 Difference]: Without dead ends: 840 [2022-03-19 02:21:42,847 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 582 GetRequests, 475 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 893 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=5016, Invalid=6756, Unknown=0, NotChecked=0, Total=11772 [2022-03-19 02:21:42,847 INFO L912 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, 1.3s IncrementalHoareTripleChecker+Time [2022-03-19 02:21:42,847 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2104 Valid, 49 Invalid, 2809 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [928 Valid, 1881 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-03-19 02:21:42,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 840 states. [2022-03-19 02:21:43,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 840 to 808. [2022-03-19 02:21:43,072 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) [2022-03-19 02:21:43,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 808 states to 808 states and 1149 transitions. [2022-03-19 02:21:43,073 INFO L78 Accepts]: Start accepts. Automaton has 808 states and 1149 transitions. Word has length 253 [2022-03-19 02:21:43,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:21:43,073 INFO L478 AbstractCegarLoop]: Abstraction has 808 states and 1149 transitions. [2022-03-19 02:21:43,073 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) [2022-03-19 02:21:43,074 INFO L276 IsEmpty]: Start isEmpty. Operand 808 states and 1149 transitions. [2022-03-19 02:21:43,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2022-03-19 02:21:43,075 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:21:43,076 INFO L500 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] [2022-03-19 02:21:43,093 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2022-03-19 02:21:43,276 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 [2022-03-19 02:21:43,276 INFO L403 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:21:43,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:21:43,276 INFO L85 PathProgramCache]: Analyzing trace with hash -1926723481, now seen corresponding path program 65 times [2022-03-19 02:21:43,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:21:43,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1170973638] [2022-03-19 02:21:43,278 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:21:43,278 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:21:43,278 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:21:43,278 INFO L85 PathProgramCache]: Analyzing trace with hash -1926723481, now seen corresponding path program 66 times [2022-03-19 02:21:43,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:21:43,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767456596] [2022-03-19 02:21:43,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:21:43,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:21:43,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:21:43,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:21:43,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:21:43,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 245 [2022-03-19 02:21:43,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:21:43,877 INFO L134 CoverageAnalysis]: Checked inductivity of 4029 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 2873 trivial. 0 not checked. [2022-03-19 02:21:43,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:21:43,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767456596] [2022-03-19 02:21:43,877 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767456596] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:21:43,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1696526782] [2022-03-19 02:21:43,877 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 02:21:43,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:21:43,877 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:21:43,878 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) [2022-03-19 02:21:43,907 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-03-19 02:21:44,124 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-19 02:21:44,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:21:44,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-19 02:21:44,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:21:44,507 INFO L134 CoverageAnalysis]: Checked inductivity of 4029 backedges. 133 proven. 1 refuted. 0 times theorem prover too weak. 3895 trivial. 0 not checked. [2022-03-19 02:21:44,507 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:21:44,894 INFO L134 CoverageAnalysis]: Checked inductivity of 4029 backedges. 133 proven. 1 refuted. 0 times theorem prover too weak. 3895 trivial. 0 not checked. [2022-03-19 02:21:44,894 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1696526782] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:21:44,894 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:21:44,894 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 7, 7] total 47 [2022-03-19 02:21:44,894 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:21:44,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1170973638] [2022-03-19 02:21:44,894 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1170973638] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:21:44,894 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:21:44,894 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2022-03-19 02:21:44,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108049714] [2022-03-19 02:21:44,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:21:44,895 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-03-19 02:21:44,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:21:44,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-03-19 02:21:44,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=695, Invalid=1467, Unknown=0, NotChecked=0, Total=2162 [2022-03-19 02:21:44,896 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) [2022-03-19 02:21:47,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:21:47,261 INFO L93 Difference]: Finished difference Result 1596 states and 2338 transitions. [2022-03-19 02:21:47,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-03-19 02:21:47,261 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 [2022-03-19 02:21:47,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:21:47,264 INFO L225 Difference]: With dead ends: 1596 [2022-03-19 02:21:47,264 INFO L226 Difference]: Without dead ends: 863 [2022-03-19 02:21:47,266 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 598 GetRequests, 515 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1083 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2104, Invalid=4868, Unknown=0, NotChecked=0, Total=6972 [2022-03-19 02:21:47,266 INFO L912 BasicCegarLoop]: 43 mSDtfsCounter, 2111 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 1849 mSolverCounterSat, 887 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s 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, 1.2s IncrementalHoareTripleChecker+Time [2022-03-19 02:21:47,266 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2115 Valid, 51 Invalid, 2736 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [887 Valid, 1849 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-03-19 02:21:47,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 863 states. [2022-03-19 02:21:47,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 863 to 831. [2022-03-19 02:21:47,486 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) [2022-03-19 02:21:47,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 831 states to 831 states and 1182 transitions. [2022-03-19 02:21:47,488 INFO L78 Accepts]: Start accepts. Automaton has 831 states and 1182 transitions. Word has length 260 [2022-03-19 02:21:47,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:21:47,488 INFO L478 AbstractCegarLoop]: Abstraction has 831 states and 1182 transitions. [2022-03-19 02:21:47,488 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) [2022-03-19 02:21:47,488 INFO L276 IsEmpty]: Start isEmpty. Operand 831 states and 1182 transitions. [2022-03-19 02:21:47,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2022-03-19 02:21:47,491 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:21:47,491 INFO L500 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] [2022-03-19 02:21:47,517 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-03-19 02:21:47,714 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 [2022-03-19 02:21:47,715 INFO L403 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:21:47,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:21:47,715 INFO L85 PathProgramCache]: Analyzing trace with hash -1996010491, now seen corresponding path program 67 times [2022-03-19 02:21:47,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:21:47,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1681966477] [2022-03-19 02:21:47,717 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:21:47,717 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:21:47,717 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:21:47,717 INFO L85 PathProgramCache]: Analyzing trace with hash -1996010491, now seen corresponding path program 68 times [2022-03-19 02:21:47,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:21:47,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555955322] [2022-03-19 02:21:47,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:21:47,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:21:47,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:21:48,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:21:48,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:21:48,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 252 [2022-03-19 02:21:48,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:21:48,331 INFO L134 CoverageAnalysis]: Checked inductivity of 4270 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 3045 trivial. 0 not checked. [2022-03-19 02:21:48,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:21:48,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555955322] [2022-03-19 02:21:48,331 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555955322] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:21:48,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969789899] [2022-03-19 02:21:48,331 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 02:21:48,331 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:21:48,332 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:21:48,333 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) [2022-03-19 02:21:48,334 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-03-19 02:21:48,605 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 02:21:48,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:21:48,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 1020 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-19 02:21:48,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:21:48,948 INFO L134 CoverageAnalysis]: Checked inductivity of 4270 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 3045 trivial. 0 not checked. [2022-03-19 02:21:48,948 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:21:50,618 INFO L134 CoverageAnalysis]: Checked inductivity of 4270 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 3045 trivial. 0 not checked. [2022-03-19 02:21:50,619 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1969789899] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:21:50,619 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:21:50,619 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 38, 38] total 77 [2022-03-19 02:21:50,619 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:21:50,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1681966477] [2022-03-19 02:21:50,619 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1681966477] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:21:50,619 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:21:50,619 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2022-03-19 02:21:50,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528551755] [2022-03-19 02:21:50,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:21:50,620 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-03-19 02:21:50,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:21:50,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-03-19 02:21:50,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2779, Invalid=3073, Unknown=0, NotChecked=0, Total=5852 [2022-03-19 02:21:50,622 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) [2022-03-19 02:21:53,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:21:53,233 INFO L93 Difference]: Finished difference Result 1640 states and 2403 transitions. [2022-03-19 02:21:53,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-03-19 02:21:53,233 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 [2022-03-19 02:21:53,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:21:53,236 INFO L225 Difference]: With dead ends: 1640 [2022-03-19 02:21:53,236 INFO L226 Difference]: Without dead ends: 886 [2022-03-19 02:21:53,238 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 614 GetRequests, 501 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 982 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=5598, Invalid=7512, Unknown=0, NotChecked=0, Total=13110 [2022-03-19 02:21:53,238 INFO L912 BasicCegarLoop]: 43 mSDtfsCounter, 2154 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 2018 mSolverCounterSat, 926 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s 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, 1.3s IncrementalHoareTripleChecker+Time [2022-03-19 02:21:53,239 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2158 Valid, 53 Invalid, 2944 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [926 Valid, 2018 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-03-19 02:21:53,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 886 states. [2022-03-19 02:21:53,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 886 to 854. [2022-03-19 02:21:53,471 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) [2022-03-19 02:21:53,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 854 states to 854 states and 1215 transitions. [2022-03-19 02:21:53,473 INFO L78 Accepts]: Start accepts. Automaton has 854 states and 1215 transitions. Word has length 267 [2022-03-19 02:21:53,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:21:53,473 INFO L478 AbstractCegarLoop]: Abstraction has 854 states and 1215 transitions. [2022-03-19 02:21:53,473 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) [2022-03-19 02:21:53,473 INFO L276 IsEmpty]: Start isEmpty. Operand 854 states and 1215 transitions. [2022-03-19 02:21:53,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 275 [2022-03-19 02:21:53,476 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:21:53,476 INFO L500 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] [2022-03-19 02:21:53,501 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2022-03-19 02:21:53,691 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 [2022-03-19 02:21:53,691 INFO L403 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:21:53,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:21:53,692 INFO L85 PathProgramCache]: Analyzing trace with hash 101824299, now seen corresponding path program 69 times [2022-03-19 02:21:53,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:21:53,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1776281205] [2022-03-19 02:21:53,693 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:21:53,693 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:21:53,693 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:21:53,694 INFO L85 PathProgramCache]: Analyzing trace with hash 101824299, now seen corresponding path program 70 times [2022-03-19 02:21:53,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:21:53,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237925290] [2022-03-19 02:21:53,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:21:53,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:21:53,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:21:54,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:21:54,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:21:54,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 259 [2022-03-19 02:21:54,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:21:54,303 INFO L134 CoverageAnalysis]: Checked inductivity of 4518 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 3222 trivial. 0 not checked. [2022-03-19 02:21:54,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:21:54,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237925290] [2022-03-19 02:21:54,304 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237925290] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:21:54,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97570281] [2022-03-19 02:21:54,304 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 02:21:54,304 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:21:54,304 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:21:54,308 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) [2022-03-19 02:21:54,324 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-03-19 02:21:54,612 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 02:21:54,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:21:54,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 1046 conjuncts, 38 conjunts are in the unsatisfiable core [2022-03-19 02:21:54,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:21:54,963 INFO L134 CoverageAnalysis]: Checked inductivity of 4518 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 3222 trivial. 0 not checked. [2022-03-19 02:21:54,964 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:21:56,638 INFO L134 CoverageAnalysis]: Checked inductivity of 4518 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 3222 trivial. 0 not checked. [2022-03-19 02:21:56,639 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [97570281] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:21:56,639 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:21:56,639 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 39, 39] total 79 [2022-03-19 02:21:56,639 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:21:56,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1776281205] [2022-03-19 02:21:56,639 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1776281205] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:21:56,639 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:21:56,639 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2022-03-19 02:21:56,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105016943] [2022-03-19 02:21:56,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:21:56,640 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-19 02:21:56,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:21:56,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-19 02:21:56,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2930, Invalid=3232, Unknown=0, NotChecked=0, Total=6162 [2022-03-19 02:21:56,642 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) [2022-03-19 02:21:59,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:21:59,295 INFO L93 Difference]: Finished difference Result 1684 states and 2468 transitions. [2022-03-19 02:21:59,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-03-19 02:21:59,295 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 [2022-03-19 02:21:59,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:21:59,298 INFO L225 Difference]: With dead ends: 1684 [2022-03-19 02:21:59,298 INFO L226 Difference]: Without dead ends: 909 [2022-03-19 02:21:59,299 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 630 GetRequests, 514 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1028 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=5901, Invalid=7905, Unknown=0, NotChecked=0, Total=13806 [2022-03-19 02:21:59,300 INFO L912 BasicCegarLoop]: 43 mSDtfsCounter, 2078 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 2160 mSolverCounterSat, 940 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s 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, 1.4s IncrementalHoareTripleChecker+Time [2022-03-19 02:21:59,300 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2082 Valid, 53 Invalid, 3100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [940 Valid, 2160 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-03-19 02:21:59,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 909 states. [2022-03-19 02:21:59,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 909 to 877. [2022-03-19 02:21:59,534 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) [2022-03-19 02:21:59,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 877 states to 877 states and 1248 transitions. [2022-03-19 02:21:59,536 INFO L78 Accepts]: Start accepts. Automaton has 877 states and 1248 transitions. Word has length 274 [2022-03-19 02:21:59,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:21:59,536 INFO L478 AbstractCegarLoop]: Abstraction has 877 states and 1248 transitions. [2022-03-19 02:21:59,536 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) [2022-03-19 02:21:59,536 INFO L276 IsEmpty]: Start isEmpty. Operand 877 states and 1248 transitions. [2022-03-19 02:21:59,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 282 [2022-03-19 02:21:59,538 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:21:59,538 INFO L500 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] [2022-03-19 02:21:59,556 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2022-03-19 02:21:59,739 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 [2022-03-19 02:21:59,739 INFO L403 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:21:59,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:21:59,741 INFO L85 PathProgramCache]: Analyzing trace with hash 31320897, now seen corresponding path program 71 times [2022-03-19 02:21:59,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:21:59,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1230197863] [2022-03-19 02:21:59,743 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:21:59,744 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:21:59,744 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:21:59,744 INFO L85 PathProgramCache]: Analyzing trace with hash 31320897, now seen corresponding path program 72 times [2022-03-19 02:21:59,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:21:59,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547554268] [2022-03-19 02:21:59,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:21:59,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:21:59,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:22:00,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:22:00,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:22:00,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 266 [2022-03-19 02:22:00,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:22:00,358 INFO L134 CoverageAnalysis]: Checked inductivity of 4773 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 3404 trivial. 0 not checked. [2022-03-19 02:22:00,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:22:00,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547554268] [2022-03-19 02:22:00,358 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547554268] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:22:00,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053533879] [2022-03-19 02:22:00,358 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 02:22:00,358 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:22:00,358 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:22:00,360 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) [2022-03-19 02:22:00,361 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-03-19 02:22:00,583 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-19 02:22:00,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:22:00,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-19 02:22:00,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:22:01,066 INFO L134 CoverageAnalysis]: Checked inductivity of 4773 backedges. 145 proven. 1 refuted. 0 times theorem prover too weak. 4627 trivial. 0 not checked. [2022-03-19 02:22:01,066 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:22:01,465 INFO L134 CoverageAnalysis]: Checked inductivity of 4773 backedges. 145 proven. 1 refuted. 0 times theorem prover too weak. 4627 trivial. 0 not checked. [2022-03-19 02:22:01,465 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2053533879] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:22:01,465 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:22:01,465 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 7, 7] total 50 [2022-03-19 02:22:01,466 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:22:01,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1230197863] [2022-03-19 02:22:01,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1230197863] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:22:01,466 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:22:01,466 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2022-03-19 02:22:01,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349196932] [2022-03-19 02:22:01,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:22:01,466 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-03-19 02:22:01,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:22:01,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-03-19 02:22:01,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=809, Invalid=1641, Unknown=0, NotChecked=0, Total=2450 [2022-03-19 02:22:01,467 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) [2022-03-19 02:22:04,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:22:04,165 INFO L93 Difference]: Finished difference Result 1728 states and 2533 transitions. [2022-03-19 02:22:04,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-03-19 02:22:04,166 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 [2022-03-19 02:22:04,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:22:04,168 INFO L225 Difference]: With dead ends: 1728 [2022-03-19 02:22:04,169 INFO L226 Difference]: Without dead ends: 932 [2022-03-19 02:22:04,170 INFO L911 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 [2022-03-19 02:22:04,170 INFO L912 BasicCegarLoop]: 43 mSDtfsCounter, 2011 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 2409 mSolverCounterSat, 841 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s 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, 1.4s IncrementalHoareTripleChecker+Time [2022-03-19 02:22:04,170 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2015 Valid, 57 Invalid, 3250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [841 Valid, 2409 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-03-19 02:22:04,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 932 states. [2022-03-19 02:22:04,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 932 to 900. [2022-03-19 02:22:04,422 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) [2022-03-19 02:22:04,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 900 states to 900 states and 1281 transitions. [2022-03-19 02:22:04,423 INFO L78 Accepts]: Start accepts. Automaton has 900 states and 1281 transitions. Word has length 281 [2022-03-19 02:22:04,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:22:04,423 INFO L478 AbstractCegarLoop]: Abstraction has 900 states and 1281 transitions. [2022-03-19 02:22:04,424 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) [2022-03-19 02:22:04,424 INFO L276 IsEmpty]: Start isEmpty. Operand 900 states and 1281 transitions. [2022-03-19 02:22:04,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 289 [2022-03-19 02:22:04,426 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:22:04,426 INFO L500 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] [2022-03-19 02:22:04,442 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2022-03-19 02:22:04,626 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 [2022-03-19 02:22:04,626 INFO L403 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:22:04,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:22:04,627 INFO L85 PathProgramCache]: Analyzing trace with hash 252910063, now seen corresponding path program 73 times [2022-03-19 02:22:04,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:22:04,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1350506973] [2022-03-19 02:22:04,629 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:22:04,629 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:22:04,629 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:22:04,629 INFO L85 PathProgramCache]: Analyzing trace with hash 252910063, now seen corresponding path program 74 times [2022-03-19 02:22:04,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:22:04,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914006169] [2022-03-19 02:22:04,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:22:04,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:22:04,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:22:05,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:22:05,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:22:05,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 273 [2022-03-19 02:22:05,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:22:05,274 INFO L134 CoverageAnalysis]: Checked inductivity of 5035 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 3591 trivial. 0 not checked. [2022-03-19 02:22:05,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:22:05,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914006169] [2022-03-19 02:22:05,274 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914006169] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:22:05,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957790908] [2022-03-19 02:22:05,274 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 02:22:05,274 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:22:05,274 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:22:05,275 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) [2022-03-19 02:22:05,276 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-03-19 02:22:05,572 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 02:22:05,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:22:05,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 1098 conjuncts, 40 conjunts are in the unsatisfiable core [2022-03-19 02:22:05,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:22:05,934 INFO L134 CoverageAnalysis]: Checked inductivity of 5035 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 3591 trivial. 0 not checked. [2022-03-19 02:22:05,934 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:22:07,738 INFO L134 CoverageAnalysis]: Checked inductivity of 5035 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 3591 trivial. 0 not checked. [2022-03-19 02:22:07,738 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1957790908] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:22:07,738 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:22:07,738 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 41, 41] total 83 [2022-03-19 02:22:07,738 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:22:07,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1350506973] [2022-03-19 02:22:07,738 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1350506973] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:22:07,738 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:22:07,738 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2022-03-19 02:22:07,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015950127] [2022-03-19 02:22:07,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:22:07,739 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-03-19 02:22:07,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:22:07,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-03-19 02:22:07,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3244, Invalid=3562, Unknown=0, NotChecked=0, Total=6806 [2022-03-19 02:22:07,741 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) [2022-03-19 02:22:10,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:22:10,546 INFO L93 Difference]: Finished difference Result 1772 states and 2598 transitions. [2022-03-19 02:22:10,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-03-19 02:22:10,547 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 [2022-03-19 02:22:10,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:22:10,550 INFO L225 Difference]: With dead ends: 1772 [2022-03-19 02:22:10,550 INFO L226 Difference]: Without dead ends: 955 [2022-03-19 02:22:10,552 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 662 GetRequests, 540 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1123 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=6531, Invalid=8721, Unknown=0, NotChecked=0, Total=15252 [2022-03-19 02:22:10,552 INFO L912 BasicCegarLoop]: 43 mSDtfsCounter, 2135 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2246 mSolverCounterSat, 875 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s 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, 1.4s IncrementalHoareTripleChecker+Time [2022-03-19 02:22:10,552 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2139 Valid, 51 Invalid, 3121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [875 Valid, 2246 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-03-19 02:22:10,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 955 states. [2022-03-19 02:22:10,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 955 to 923. [2022-03-19 02:22:10,811 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) [2022-03-19 02:22:10,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 923 states to 923 states and 1314 transitions. [2022-03-19 02:22:10,813 INFO L78 Accepts]: Start accepts. Automaton has 923 states and 1314 transitions. Word has length 288 [2022-03-19 02:22:10,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:22:10,813 INFO L478 AbstractCegarLoop]: Abstraction has 923 states and 1314 transitions. [2022-03-19 02:22:10,813 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) [2022-03-19 02:22:10,813 INFO L276 IsEmpty]: Start isEmpty. Operand 923 states and 1314 transitions. [2022-03-19 02:22:10,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 296 [2022-03-19 02:22:10,816 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:22:10,816 INFO L500 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] [2022-03-19 02:22:10,844 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-03-19 02:22:11,031 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 [2022-03-19 02:22:11,031 INFO L403 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:22:11,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:22:11,032 INFO L85 PathProgramCache]: Analyzing trace with hash -1967344003, now seen corresponding path program 75 times [2022-03-19 02:22:11,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:22:11,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [764767881] [2022-03-19 02:22:11,034 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:22:11,034 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:22:11,034 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:22:11,034 INFO L85 PathProgramCache]: Analyzing trace with hash -1967344003, now seen corresponding path program 76 times [2022-03-19 02:22:11,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:22:11,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345493715] [2022-03-19 02:22:11,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:22:11,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:22:11,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:22:11,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:22:11,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:22:11,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 280 [2022-03-19 02:22:11,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:22:11,758 INFO L134 CoverageAnalysis]: Checked inductivity of 5304 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 3783 trivial. 0 not checked. [2022-03-19 02:22:11,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:22:11,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345493715] [2022-03-19 02:22:11,758 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345493715] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:22:11,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072844082] [2022-03-19 02:22:11,758 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 02:22:11,758 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:22:11,759 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:22:11,760 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) [2022-03-19 02:22:11,760 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-03-19 02:22:12,076 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 02:22:12,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:22:12,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 1124 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-19 02:22:12,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:22:12,420 INFO L134 CoverageAnalysis]: Checked inductivity of 5304 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 3783 trivial. 0 not checked. [2022-03-19 02:22:12,420 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:22:14,274 INFO L134 CoverageAnalysis]: Checked inductivity of 5304 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 3783 trivial. 0 not checked. [2022-03-19 02:22:14,275 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1072844082] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:22:14,275 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:22:14,275 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 42, 42] total 85 [2022-03-19 02:22:14,275 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:22:14,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [764767881] [2022-03-19 02:22:14,275 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [764767881] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:22:14,275 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:22:14,275 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2022-03-19 02:22:14,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221589208] [2022-03-19 02:22:14,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:22:14,275 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-03-19 02:22:14,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:22:14,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-03-19 02:22:14,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3407, Invalid=3733, Unknown=0, NotChecked=0, Total=7140 [2022-03-19 02:22:14,277 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) [2022-03-19 02:22:17,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:22:17,170 INFO L93 Difference]: Finished difference Result 1816 states and 2663 transitions. [2022-03-19 02:22:17,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-03-19 02:22:17,170 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 [2022-03-19 02:22:17,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:22:17,174 INFO L225 Difference]: With dead ends: 1816 [2022-03-19 02:22:17,174 INFO L226 Difference]: Without dead ends: 978 [2022-03-19 02:22:17,176 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 678 GetRequests, 553 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1172 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=6858, Invalid=9144, Unknown=0, NotChecked=0, Total=16002 [2022-03-19 02:22:17,177 INFO L912 BasicCegarLoop]: 43 mSDtfsCounter, 2337 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 2337 mSolverCounterSat, 1083 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s 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, 1.5s IncrementalHoareTripleChecker+Time [2022-03-19 02:22:17,177 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2341 Valid, 49 Invalid, 3420 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1083 Valid, 2337 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-03-19 02:22:17,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 978 states. [2022-03-19 02:22:17,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 978 to 946. [2022-03-19 02:22:17,442 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) [2022-03-19 02:22:17,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 946 states to 946 states and 1347 transitions. [2022-03-19 02:22:17,444 INFO L78 Accepts]: Start accepts. Automaton has 946 states and 1347 transitions. Word has length 295 [2022-03-19 02:22:17,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:22:17,444 INFO L478 AbstractCegarLoop]: Abstraction has 946 states and 1347 transitions. [2022-03-19 02:22:17,444 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) [2022-03-19 02:22:17,444 INFO L276 IsEmpty]: Start isEmpty. Operand 946 states and 1347 transitions. [2022-03-19 02:22:17,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 303 [2022-03-19 02:22:17,446 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:22:17,446 INFO L500 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] [2022-03-19 02:22:17,465 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-03-19 02:22:17,647 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 [2022-03-19 02:22:17,647 INFO L403 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:22:17,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:22:17,648 INFO L85 PathProgramCache]: Analyzing trace with hash 596373683, now seen corresponding path program 77 times [2022-03-19 02:22:17,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:22:17,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [906550402] [2022-03-19 02:22:17,649 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:22:17,649 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:22:17,649 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:22:17,649 INFO L85 PathProgramCache]: Analyzing trace with hash 596373683, now seen corresponding path program 78 times [2022-03-19 02:22:17,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:22:17,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983677300] [2022-03-19 02:22:17,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:22:17,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:22:17,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:22:18,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:22:18,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:22:18,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 287 [2022-03-19 02:22:18,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:22:18,339 INFO L134 CoverageAnalysis]: Checked inductivity of 5580 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 3980 trivial. 0 not checked. [2022-03-19 02:22:18,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:22:18,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983677300] [2022-03-19 02:22:18,339 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983677300] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:22:18,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1393916278] [2022-03-19 02:22:18,339 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 02:22:18,339 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:22:18,339 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:22:18,340 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) [2022-03-19 02:22:18,341 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-03-19 02:22:18,584 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-19 02:22:18,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:22:18,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-19 02:22:18,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:22:19,022 INFO L134 CoverageAnalysis]: Checked inductivity of 5580 backedges. 157 proven. 1 refuted. 0 times theorem prover too weak. 5422 trivial. 0 not checked. [2022-03-19 02:22:19,022 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:22:19,435 INFO L134 CoverageAnalysis]: Checked inductivity of 5580 backedges. 157 proven. 1 refuted. 0 times theorem prover too weak. 5422 trivial. 0 not checked. [2022-03-19 02:22:19,436 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1393916278] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:22:19,436 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:22:19,436 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 7, 7] total 53 [2022-03-19 02:22:19,436 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:22:19,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [906550402] [2022-03-19 02:22:19,436 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [906550402] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:22:19,436 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:22:19,436 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2022-03-19 02:22:19,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497352480] [2022-03-19 02:22:19,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:22:19,436 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-03-19 02:22:19,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:22:19,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-03-19 02:22:19,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=932, Invalid=1824, Unknown=0, NotChecked=0, Total=2756 [2022-03-19 02:22:19,437 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) [2022-03-19 02:22:22,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:22:22,412 INFO L93 Difference]: Finished difference Result 1860 states and 2728 transitions. [2022-03-19 02:22:22,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-03-19 02:22:22,412 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 [2022-03-19 02:22:22,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:22:22,415 INFO L225 Difference]: With dead ends: 1860 [2022-03-19 02:22:22,415 INFO L226 Difference]: Without dead ends: 1001 [2022-03-19 02:22:22,417 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 694 GetRequests, 599 SyntacticMatches, 1 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1392 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2827, Invalid=6293, Unknown=0, NotChecked=0, Total=9120 [2022-03-19 02:22:22,418 INFO L912 BasicCegarLoop]: 43 mSDtfsCounter, 2437 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 2472 mSolverCounterSat, 1098 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s 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, 1.5s IncrementalHoareTripleChecker+Time [2022-03-19 02:22:22,418 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2441 Valid, 55 Invalid, 3570 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1098 Valid, 2472 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-03-19 02:22:22,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1001 states. [2022-03-19 02:22:22,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1001 to 969. [2022-03-19 02:22:22,715 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) [2022-03-19 02:22:22,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 969 states to 969 states and 1380 transitions. [2022-03-19 02:22:22,717 INFO L78 Accepts]: Start accepts. Automaton has 969 states and 1380 transitions. Word has length 302 [2022-03-19 02:22:22,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:22:22,717 INFO L478 AbstractCegarLoop]: Abstraction has 969 states and 1380 transitions. [2022-03-19 02:22:22,717 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) [2022-03-19 02:22:22,717 INFO L276 IsEmpty]: Start isEmpty. Operand 969 states and 1380 transitions. [2022-03-19 02:22:22,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 310 [2022-03-19 02:22:22,720 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:22:22,720 INFO L500 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] [2022-03-19 02:22:22,737 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2022-03-19 02:22:22,921 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 [2022-03-19 02:22:22,921 INFO L403 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:22:22,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:22:22,922 INFO L85 PathProgramCache]: Analyzing trace with hash 1015311801, now seen corresponding path program 79 times [2022-03-19 02:22:22,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:22:22,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1381819942] [2022-03-19 02:22:22,924 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:22:22,924 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:22:22,924 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:22:22,924 INFO L85 PathProgramCache]: Analyzing trace with hash 1015311801, now seen corresponding path program 80 times [2022-03-19 02:22:22,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:22:22,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227651406] [2022-03-19 02:22:22,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:22:22,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:22:22,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:22:23,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:22:23,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:22:23,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 294 [2022-03-19 02:22:23,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:22:23,635 INFO L134 CoverageAnalysis]: Checked inductivity of 5863 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 4182 trivial. 0 not checked. [2022-03-19 02:22:23,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:22:23,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227651406] [2022-03-19 02:22:23,635 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227651406] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:22:23,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574808508] [2022-03-19 02:22:23,635 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 02:22:23,635 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:22:23,635 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:22:23,636 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) [2022-03-19 02:22:23,637 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-03-19 02:22:23,980 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 02:22:23,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:22:23,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 1176 conjuncts, 43 conjunts are in the unsatisfiable core [2022-03-19 02:22:23,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:22:24,389 INFO L134 CoverageAnalysis]: Checked inductivity of 5863 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 4182 trivial. 0 not checked. [2022-03-19 02:22:24,390 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:22:26,420 INFO L134 CoverageAnalysis]: Checked inductivity of 5863 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 4182 trivial. 0 not checked. [2022-03-19 02:22:26,420 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [574808508] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:22:26,420 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:22:26,420 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 44, 44] total 89 [2022-03-19 02:22:26,421 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:22:26,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1381819942] [2022-03-19 02:22:26,421 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1381819942] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:22:26,421 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:22:26,421 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2022-03-19 02:22:26,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530828637] [2022-03-19 02:22:26,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:22:26,421 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-03-19 02:22:26,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:22:26,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-03-19 02:22:26,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3745, Invalid=4087, Unknown=0, NotChecked=0, Total=7832 [2022-03-19 02:22:26,423 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) [2022-03-19 02:22:29,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:22:29,620 INFO L93 Difference]: Finished difference Result 1904 states and 2793 transitions. [2022-03-19 02:22:29,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-03-19 02:22:29,621 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 [2022-03-19 02:22:29,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:22:29,625 INFO L225 Difference]: With dead ends: 1904 [2022-03-19 02:22:29,625 INFO L226 Difference]: Without dead ends: 1024 [2022-03-19 02:22:29,627 INFO L911 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 [2022-03-19 02:22:29,628 INFO L912 BasicCegarLoop]: 43 mSDtfsCounter, 2442 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 2578 mSolverCounterSat, 1181 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s 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, 1.6s IncrementalHoareTripleChecker+Time [2022-03-19 02:22:29,628 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2446 Valid, 49 Invalid, 3759 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1181 Valid, 2578 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-03-19 02:22:29,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1024 states. [2022-03-19 02:22:29,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1024 to 992. [2022-03-19 02:22:29,931 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) [2022-03-19 02:22:29,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 992 states to 992 states and 1413 transitions. [2022-03-19 02:22:29,933 INFO L78 Accepts]: Start accepts. Automaton has 992 states and 1413 transitions. Word has length 309 [2022-03-19 02:22:29,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:22:29,933 INFO L478 AbstractCegarLoop]: Abstraction has 992 states and 1413 transitions. [2022-03-19 02:22:29,933 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) [2022-03-19 02:22:29,933 INFO L276 IsEmpty]: Start isEmpty. Operand 992 states and 1413 transitions. [2022-03-19 02:22:29,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 317 [2022-03-19 02:22:29,936 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:22:29,936 INFO L500 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] [2022-03-19 02:22:29,962 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-03-19 02:22:30,162 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 [2022-03-19 02:22:30,162 INFO L403 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:22:30,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:22:30,162 INFO L85 PathProgramCache]: Analyzing trace with hash 1062959991, now seen corresponding path program 81 times [2022-03-19 02:22:30,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:22:30,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [61321635] [2022-03-19 02:22:30,164 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:22:30,164 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:22:30,165 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:22:30,165 INFO L85 PathProgramCache]: Analyzing trace with hash 1062959991, now seen corresponding path program 82 times [2022-03-19 02:22:30,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:22:30,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332164985] [2022-03-19 02:22:30,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:22:30,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:22:30,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:22:31,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:22:31,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:22:31,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 301 [2022-03-19 02:22:31,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:22:31,055 INFO L134 CoverageAnalysis]: Checked inductivity of 6153 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 4389 trivial. 0 not checked. [2022-03-19 02:22:31,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:22:31,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332164985] [2022-03-19 02:22:31,056 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332164985] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:22:31,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183556911] [2022-03-19 02:22:31,056 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 02:22:31,056 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:22:31,056 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:22:31,057 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) [2022-03-19 02:22:31,058 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-03-19 02:22:31,432 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 02:22:31,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:22:31,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 1202 conjuncts, 44 conjunts are in the unsatisfiable core [2022-03-19 02:22:31,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:22:31,853 INFO L134 CoverageAnalysis]: Checked inductivity of 6153 backedges. 0 proven. 4388 refuted. 0 times theorem prover too weak. 1765 trivial. 0 not checked. [2022-03-19 02:22:31,853 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:22:33,950 INFO L134 CoverageAnalysis]: Checked inductivity of 6153 backedges. 0 proven. 4388 refuted. 0 times theorem prover too weak. 1765 trivial. 0 not checked. [2022-03-19 02:22:33,950 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [183556911] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:22:33,950 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:22:33,950 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 45, 45] total 91 [2022-03-19 02:22:33,950 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:22:33,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [61321635] [2022-03-19 02:22:33,950 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [61321635] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:22:33,951 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:22:33,951 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2022-03-19 02:22:33,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950344125] [2022-03-19 02:22:33,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:22:33,951 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-03-19 02:22:33,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:22:33,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-03-19 02:22:33,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3920, Invalid=4270, Unknown=0, NotChecked=0, Total=8190 [2022-03-19 02:22:33,952 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) [2022-03-19 02:22:37,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:22:37,131 INFO L93 Difference]: Finished difference Result 1948 states and 2858 transitions. [2022-03-19 02:22:37,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-03-19 02:22:37,131 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 [2022-03-19 02:22:37,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:22:37,135 INFO L225 Difference]: With dead ends: 1948 [2022-03-19 02:22:37,136 INFO L226 Difference]: Without dead ends: 1047 [2022-03-19 02:22:37,138 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 726 GetRequests, 592 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1325 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=7887, Invalid=10473, Unknown=0, NotChecked=0, Total=18360 [2022-03-19 02:22:37,138 INFO L912 BasicCegarLoop]: 43 mSDtfsCounter, 2358 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 2462 mSolverCounterSat, 1045 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s 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, 1.5s IncrementalHoareTripleChecker+Time [2022-03-19 02:22:37,138 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2362 Valid, 55 Invalid, 3507 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1045 Valid, 2462 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-03-19 02:22:37,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1047 states. [2022-03-19 02:22:37,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1047 to 1015. [2022-03-19 02:22:37,447 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) [2022-03-19 02:22:37,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1015 states to 1015 states and 1446 transitions. [2022-03-19 02:22:37,448 INFO L78 Accepts]: Start accepts. Automaton has 1015 states and 1446 transitions. Word has length 316 [2022-03-19 02:22:37,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:22:37,448 INFO L478 AbstractCegarLoop]: Abstraction has 1015 states and 1446 transitions. [2022-03-19 02:22:37,448 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) [2022-03-19 02:22:37,448 INFO L276 IsEmpty]: Start isEmpty. Operand 1015 states and 1446 transitions. [2022-03-19 02:22:37,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 324 [2022-03-19 02:22:37,451 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:22:37,451 INFO L500 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] [2022-03-19 02:22:37,469 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2022-03-19 02:22:37,652 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 [2022-03-19 02:22:37,652 INFO L403 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:22:37,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:22:37,652 INFO L85 PathProgramCache]: Analyzing trace with hash -577384203, now seen corresponding path program 83 times [2022-03-19 02:22:37,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:22:37,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [867159535] [2022-03-19 02:22:37,654 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:22:37,654 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:22:37,654 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:22:37,654 INFO L85 PathProgramCache]: Analyzing trace with hash -577384203, now seen corresponding path program 84 times [2022-03-19 02:22:37,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:22:37,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578369556] [2022-03-19 02:22:37,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:22:37,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:22:37,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:22:38,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:22:38,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:22:38,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 308 [2022-03-19 02:22:38,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:22:38,409 INFO L134 CoverageAnalysis]: Checked inductivity of 6450 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 4601 trivial. 0 not checked. [2022-03-19 02:22:38,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:22:38,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578369556] [2022-03-19 02:22:38,409 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578369556] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:22:38,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [719638240] [2022-03-19 02:22:38,409 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 02:22:38,409 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:22:38,409 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:22:38,410 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) [2022-03-19 02:22:38,412 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-03-19 02:22:38,679 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-19 02:22:38,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:22:38,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-19 02:22:38,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:22:39,127 INFO L134 CoverageAnalysis]: Checked inductivity of 6450 backedges. 169 proven. 1 refuted. 0 times theorem prover too weak. 6280 trivial. 0 not checked. [2022-03-19 02:22:39,127 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:22:39,571 INFO L134 CoverageAnalysis]: Checked inductivity of 6450 backedges. 169 proven. 1 refuted. 0 times theorem prover too weak. 6280 trivial. 0 not checked. [2022-03-19 02:22:39,572 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [719638240] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:22:39,572 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:22:39,572 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 7, 7] total 56 [2022-03-19 02:22:39,572 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:22:39,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [867159535] [2022-03-19 02:22:39,572 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [867159535] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:22:39,572 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:22:39,572 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [] total 48 [2022-03-19 02:22:39,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310043800] [2022-03-19 02:22:39,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:22:39,573 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-03-19 02:22:39,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:22:39,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-03-19 02:22:39,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1064, Invalid=2016, Unknown=0, NotChecked=0, Total=3080 [2022-03-19 02:22:39,574 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) [2022-03-19 02:22:42,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:22:42,882 INFO L93 Difference]: Finished difference Result 1992 states and 2923 transitions. [2022-03-19 02:22:42,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-03-19 02:22:42,882 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 [2022-03-19 02:22:42,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:22:42,887 INFO L225 Difference]: With dead ends: 1992 [2022-03-19 02:22:42,887 INFO L226 Difference]: Without dead ends: 1070 [2022-03-19 02:22:42,889 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 742 GetRequests, 641 SyntacticMatches, 1 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1560 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=3229, Invalid=7073, Unknown=0, NotChecked=0, Total=10302 [2022-03-19 02:22:42,890 INFO L912 BasicCegarLoop]: 43 mSDtfsCounter, 2793 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2501 mSolverCounterSat, 1274 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s 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, 1.6s IncrementalHoareTripleChecker+Time [2022-03-19 02:22:42,890 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2797 Valid, 51 Invalid, 3775 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1274 Valid, 2501 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-03-19 02:22:42,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1070 states. [2022-03-19 02:22:43,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1070 to 1038. [2022-03-19 02:22:43,225 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) [2022-03-19 02:22:43,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1038 states to 1038 states and 1479 transitions. [2022-03-19 02:22:43,227 INFO L78 Accepts]: Start accepts. Automaton has 1038 states and 1479 transitions. Word has length 323 [2022-03-19 02:22:43,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:22:43,227 INFO L478 AbstractCegarLoop]: Abstraction has 1038 states and 1479 transitions. [2022-03-19 02:22:43,227 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) [2022-03-19 02:22:43,228 INFO L276 IsEmpty]: Start isEmpty. Operand 1038 states and 1479 transitions. [2022-03-19 02:22:43,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2022-03-19 02:22:43,231 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:22:43,231 INFO L500 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] [2022-03-19 02:22:43,256 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-03-19 02:22:43,456 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 [2022-03-19 02:22:43,456 INFO L403 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:22:43,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:22:43,456 INFO L85 PathProgramCache]: Analyzing trace with hash -2099185093, now seen corresponding path program 85 times [2022-03-19 02:22:43,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:22:43,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [742264831] [2022-03-19 02:22:43,458 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:22:43,458 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:22:43,458 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:22:43,459 INFO L85 PathProgramCache]: Analyzing trace with hash -2099185093, now seen corresponding path program 86 times [2022-03-19 02:22:43,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:22:43,459 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151573764] [2022-03-19 02:22:43,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:22:43,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:22:43,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:22:44,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:22:44,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:22:44,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 315 [2022-03-19 02:22:44,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:22:44,326 INFO L134 CoverageAnalysis]: Checked inductivity of 6754 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 4818 trivial. 0 not checked. [2022-03-19 02:22:44,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:22:44,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151573764] [2022-03-19 02:22:44,326 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151573764] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:22:44,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984985346] [2022-03-19 02:22:44,326 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 02:22:44,326 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:22:44,326 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:22:44,327 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) [2022-03-19 02:22:44,328 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-03-19 02:22:44,685 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 02:22:44,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:22:44,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 1254 conjuncts, 46 conjunts are in the unsatisfiable core [2022-03-19 02:22:44,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:22:45,087 INFO L134 CoverageAnalysis]: Checked inductivity of 6754 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 4818 trivial. 0 not checked. [2022-03-19 02:22:45,087 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:22:47,404 INFO L134 CoverageAnalysis]: Checked inductivity of 6754 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 4818 trivial. 0 not checked. [2022-03-19 02:22:47,405 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [984985346] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:22:47,405 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:22:47,405 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 47, 47] total 95 [2022-03-19 02:22:47,405 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:22:47,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [742264831] [2022-03-19 02:22:47,405 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [742264831] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:22:47,405 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:22:47,405 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [49] imperfect sequences [] total 49 [2022-03-19 02:22:47,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203330451] [2022-03-19 02:22:47,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:22:47,406 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-03-19 02:22:47,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:22:47,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-03-19 02:22:47,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4282, Invalid=4648, Unknown=0, NotChecked=0, Total=8930 [2022-03-19 02:22:47,407 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) [2022-03-19 02:22:50,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:22:50,968 INFO L93 Difference]: Finished difference Result 2036 states and 2988 transitions. [2022-03-19 02:22:50,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-03-19 02:22:50,968 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 [2022-03-19 02:22:50,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:22:50,972 INFO L225 Difference]: With dead ends: 2036 [2022-03-19 02:22:50,972 INFO L226 Difference]: Without dead ends: 1093 [2022-03-19 02:22:50,975 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 758 GetRequests, 618 SyntacticMatches, 0 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1432 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=8613, Invalid=11409, Unknown=0, NotChecked=0, Total=20022 [2022-03-19 02:22:50,976 INFO L912 BasicCegarLoop]: 43 mSDtfsCounter, 2436 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 2791 mSolverCounterSat, 1053 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s 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, 1.6s IncrementalHoareTripleChecker+Time [2022-03-19 02:22:50,976 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2440 Valid, 59 Invalid, 3844 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1053 Valid, 2791 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-03-19 02:22:50,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1093 states. [2022-03-19 02:22:51,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1093 to 1061. [2022-03-19 02:22:51,508 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) [2022-03-19 02:22:51,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1061 states to 1061 states and 1512 transitions. [2022-03-19 02:22:51,510 INFO L78 Accepts]: Start accepts. Automaton has 1061 states and 1512 transitions. Word has length 330 [2022-03-19 02:22:51,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:22:51,510 INFO L478 AbstractCegarLoop]: Abstraction has 1061 states and 1512 transitions. [2022-03-19 02:22:51,510 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) [2022-03-19 02:22:51,510 INFO L276 IsEmpty]: Start isEmpty. Operand 1061 states and 1512 transitions. [2022-03-19 02:22:51,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 338 [2022-03-19 02:22:51,513 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:22:51,513 INFO L500 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] [2022-03-19 02:22:51,531 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2022-03-19 02:22:51,713 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 [2022-03-19 02:22:51,714 INFO L403 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:22:51,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:22:51,714 INFO L85 PathProgramCache]: Analyzing trace with hash 1037148209, now seen corresponding path program 87 times [2022-03-19 02:22:51,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:22:51,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [523685948] [2022-03-19 02:22:51,716 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:22:51,716 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:22:51,716 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:22:51,716 INFO L85 PathProgramCache]: Analyzing trace with hash 1037148209, now seen corresponding path program 88 times [2022-03-19 02:22:51,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:22:51,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542271371] [2022-03-19 02:22:51,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:22:51,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:22:51,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:22:52,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:22:52,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:22:52,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 322 [2022-03-19 02:22:52,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:22:52,626 INFO L134 CoverageAnalysis]: Checked inductivity of 7065 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 5040 trivial. 0 not checked. [2022-03-19 02:22:52,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:22:52,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542271371] [2022-03-19 02:22:52,626 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542271371] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:22:52,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260109678] [2022-03-19 02:22:52,626 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 02:22:52,627 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:22:52,627 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:22:52,629 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) [2022-03-19 02:22:52,630 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-03-19 02:22:52,998 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 02:22:52,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:22:53,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 1280 conjuncts, 47 conjunts are in the unsatisfiable core [2022-03-19 02:22:53,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:22:53,394 INFO L134 CoverageAnalysis]: Checked inductivity of 7065 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 5040 trivial. 0 not checked. [2022-03-19 02:22:53,394 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:22:55,802 INFO L134 CoverageAnalysis]: Checked inductivity of 7065 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 5040 trivial. 0 not checked. [2022-03-19 02:22:55,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [260109678] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:22:55,802 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:22:55,802 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 48, 48] total 97 [2022-03-19 02:22:55,803 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:22:55,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [523685948] [2022-03-19 02:22:55,803 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [523685948] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:22:55,803 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:22:55,803 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2022-03-19 02:22:55,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695940388] [2022-03-19 02:22:55,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:22:55,803 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-03-19 02:22:55,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:22:55,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-03-19 02:22:55,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4469, Invalid=4843, Unknown=0, NotChecked=0, Total=9312 [2022-03-19 02:22:55,805 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) [2022-03-19 02:22:59,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:22:59,557 INFO L93 Difference]: Finished difference Result 2080 states and 3053 transitions. [2022-03-19 02:22:59,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-03-19 02:22:59,558 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 [2022-03-19 02:22:59,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:22:59,561 INFO L225 Difference]: With dead ends: 2080 [2022-03-19 02:22:59,561 INFO L226 Difference]: Without dead ends: 1116 [2022-03-19 02:22:59,565 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 774 GetRequests, 631 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1487 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=8988, Invalid=11892, Unknown=0, NotChecked=0, Total=20880 [2022-03-19 02:22:59,565 INFO L912 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, 1.7s IncrementalHoareTripleChecker+Time [2022-03-19 02:22:59,565 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2621 Valid, 55 Invalid, 3924 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1170 Valid, 2754 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-03-19 02:22:59,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1116 states. [2022-03-19 02:22:59,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1116 to 1084. [2022-03-19 02:22:59,916 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) [2022-03-19 02:22:59,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1084 states to 1084 states and 1545 transitions. [2022-03-19 02:22:59,918 INFO L78 Accepts]: Start accepts. Automaton has 1084 states and 1545 transitions. Word has length 337 [2022-03-19 02:22:59,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:22:59,918 INFO L478 AbstractCegarLoop]: Abstraction has 1084 states and 1545 transitions. [2022-03-19 02:22:59,918 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) [2022-03-19 02:22:59,919 INFO L276 IsEmpty]: Start isEmpty. Operand 1084 states and 1545 transitions. [2022-03-19 02:22:59,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 345 [2022-03-19 02:22:59,921 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:22:59,921 INFO L500 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] [2022-03-19 02:22:59,940 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2022-03-19 02:23:00,121 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 [2022-03-19 02:23:00,122 INFO L403 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:23:00,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:23:00,122 INFO L85 PathProgramCache]: Analyzing trace with hash -688149249, now seen corresponding path program 89 times [2022-03-19 02:23:00,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:23:00,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1421060880] [2022-03-19 02:23:00,124 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:23:00,124 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:23:00,124 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:23:00,124 INFO L85 PathProgramCache]: Analyzing trace with hash -688149249, now seen corresponding path program 90 times [2022-03-19 02:23:00,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:23:00,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5041456] [2022-03-19 02:23:00,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:23:00,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:23:00,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:23:00,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:23:00,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:23:00,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 329 [2022-03-19 02:23:00,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:23:00,959 INFO L134 CoverageAnalysis]: Checked inductivity of 7383 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 5267 trivial. 0 not checked. [2022-03-19 02:23:00,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:23:00,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5041456] [2022-03-19 02:23:00,960 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5041456] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:23:00,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973609462] [2022-03-19 02:23:00,960 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 02:23:00,960 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:23:00,960 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:23:00,961 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) [2022-03-19 02:23:00,962 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-03-19 02:23:01,267 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-19 02:23:01,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:23:01,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-19 02:23:01,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:23:01,730 INFO L134 CoverageAnalysis]: Checked inductivity of 7383 backedges. 181 proven. 1 refuted. 0 times theorem prover too weak. 7201 trivial. 0 not checked. [2022-03-19 02:23:01,731 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:23:02,182 INFO L134 CoverageAnalysis]: Checked inductivity of 7383 backedges. 181 proven. 1 refuted. 0 times theorem prover too weak. 7201 trivial. 0 not checked. [2022-03-19 02:23:02,182 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1973609462] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:23:02,183 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:23:02,183 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 7, 7] total 59 [2022-03-19 02:23:02,183 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:23:02,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1421060880] [2022-03-19 02:23:02,183 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1421060880] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:23:02,183 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:23:02,183 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [51] imperfect sequences [] total 51 [2022-03-19 02:23:02,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833192955] [2022-03-19 02:23:02,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:23:02,183 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-03-19 02:23:02,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:23:02,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-03-19 02:23:02,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1205, Invalid=2217, Unknown=0, NotChecked=0, Total=3422 [2022-03-19 02:23:02,184 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) [2022-03-19 02:23:05,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:23:05,756 INFO L93 Difference]: Finished difference Result 2124 states and 3118 transitions. [2022-03-19 02:23:05,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-03-19 02:23:05,756 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 [2022-03-19 02:23:05,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:23:05,759 INFO L225 Difference]: With dead ends: 2124 [2022-03-19 02:23:05,759 INFO L226 Difference]: Without dead ends: 1139 [2022-03-19 02:23:05,762 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 790 GetRequests, 683 SyntacticMatches, 1 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1737 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=3658, Invalid=7898, Unknown=0, NotChecked=0, Total=11556 [2022-03-19 02:23:05,762 INFO L912 BasicCegarLoop]: 43 mSDtfsCounter, 2873 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 2684 mSolverCounterSat, 1231 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s 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, 1.7s IncrementalHoareTripleChecker+Time [2022-03-19 02:23:05,763 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2877 Valid, 59 Invalid, 3915 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1231 Valid, 2684 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-03-19 02:23:05,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1139 states. [2022-03-19 02:23:06,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1139 to 1107. [2022-03-19 02:23:06,297 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) [2022-03-19 02:23:06,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1107 states to 1107 states and 1578 transitions. [2022-03-19 02:23:06,299 INFO L78 Accepts]: Start accepts. Automaton has 1107 states and 1578 transitions. Word has length 344 [2022-03-19 02:23:06,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:23:06,300 INFO L478 AbstractCegarLoop]: Abstraction has 1107 states and 1578 transitions. [2022-03-19 02:23:06,300 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) [2022-03-19 02:23:06,300 INFO L276 IsEmpty]: Start isEmpty. Operand 1107 states and 1578 transitions. [2022-03-19 02:23:06,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 352 [2022-03-19 02:23:06,303 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:23:06,303 INFO L500 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] [2022-03-19 02:23:06,330 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-03-19 02:23:06,518 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 [2022-03-19 02:23:06,519 INFO L403 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:23:06,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:23:06,519 INFO L85 PathProgramCache]: Analyzing trace with hash -1835492499, now seen corresponding path program 91 times [2022-03-19 02:23:06,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:23:06,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2048739439] [2022-03-19 02:23:06,521 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:23:06,521 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:23:06,521 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:23:06,521 INFO L85 PathProgramCache]: Analyzing trace with hash -1835492499, now seen corresponding path program 92 times [2022-03-19 02:23:06,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:23:06,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497898375] [2022-03-19 02:23:06,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:23:06,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:23:06,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:23:07,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:23:07,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:23:07,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 336 [2022-03-19 02:23:07,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:23:07,511 INFO L134 CoverageAnalysis]: Checked inductivity of 7708 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 5499 trivial. 0 not checked. [2022-03-19 02:23:07,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:23:07,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497898375] [2022-03-19 02:23:07,511 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497898375] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:23:07,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [566493129] [2022-03-19 02:23:07,512 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 02:23:07,512 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:23:07,512 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:23:07,513 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) [2022-03-19 02:23:07,513 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-03-19 02:23:07,895 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 02:23:07,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:23:07,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 1332 conjuncts, 49 conjunts are in the unsatisfiable core [2022-03-19 02:23:07,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:23:08,302 INFO L134 CoverageAnalysis]: Checked inductivity of 7708 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 5499 trivial. 0 not checked. [2022-03-19 02:23:08,302 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:23:10,888 INFO L134 CoverageAnalysis]: Checked inductivity of 7708 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 5499 trivial. 0 not checked. [2022-03-19 02:23:10,888 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [566493129] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:23:10,888 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:23:10,888 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 50, 50] total 101 [2022-03-19 02:23:10,888 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:23:10,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2048739439] [2022-03-19 02:23:10,888 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2048739439] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:23:10,888 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:23:10,888 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [52] imperfect sequences [] total 52 [2022-03-19 02:23:10,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021446715] [2022-03-19 02:23:10,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:23:10,889 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-03-19 02:23:10,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:23:10,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-03-19 02:23:10,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4855, Invalid=5245, Unknown=0, NotChecked=0, Total=10100 [2022-03-19 02:23:10,890 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) [2022-03-19 02:23:14,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:23:14,720 INFO L93 Difference]: Finished difference Result 2168 states and 3183 transitions. [2022-03-19 02:23:14,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-03-19 02:23:14,720 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 [2022-03-19 02:23:14,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:23:14,723 INFO L225 Difference]: With dead ends: 2168 [2022-03-19 02:23:14,723 INFO L226 Difference]: Without dead ends: 1162 [2022-03-19 02:23:14,726 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 806 GetRequests, 657 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1600 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=9762, Invalid=12888, Unknown=0, NotChecked=0, Total=22650 [2022-03-19 02:23:14,726 INFO L912 BasicCegarLoop]: 43 mSDtfsCounter, 3131 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 2434 mSolverCounterSat, 1429 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s 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, 1.7s IncrementalHoareTripleChecker+Time [2022-03-19 02:23:14,726 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [3135 Valid, 47 Invalid, 3863 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1429 Valid, 2434 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-03-19 02:23:14,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1162 states. [2022-03-19 02:23:15,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1162 to 1130. [2022-03-19 02:23:15,107 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) [2022-03-19 02:23:15,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1130 states to 1130 states and 1611 transitions. [2022-03-19 02:23:15,109 INFO L78 Accepts]: Start accepts. Automaton has 1130 states and 1611 transitions. Word has length 351 [2022-03-19 02:23:15,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:23:15,109 INFO L478 AbstractCegarLoop]: Abstraction has 1130 states and 1611 transitions. [2022-03-19 02:23:15,109 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) [2022-03-19 02:23:15,109 INFO L276 IsEmpty]: Start isEmpty. Operand 1130 states and 1611 transitions. [2022-03-19 02:23:15,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 359 [2022-03-19 02:23:15,112 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:23:15,112 INFO L500 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] [2022-03-19 02:23:15,131 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2022-03-19 02:23:15,312 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 [2022-03-19 02:23:15,312 INFO L403 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:23:15,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:23:15,313 INFO L85 PathProgramCache]: Analyzing trace with hash -1861561405, now seen corresponding path program 93 times [2022-03-19 02:23:15,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:23:15,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [814839623] [2022-03-19 02:23:15,314 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:23:15,314 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:23:15,314 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:23:15,314 INFO L85 PathProgramCache]: Analyzing trace with hash -1861561405, now seen corresponding path program 94 times [2022-03-19 02:23:15,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:23:15,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421025221] [2022-03-19 02:23:15,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:23:15,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:23:15,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:23:16,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:23:16,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:23:16,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 343 [2022-03-19 02:23:16,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:23:16,298 INFO L134 CoverageAnalysis]: Checked inductivity of 8040 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 5736 trivial. 0 not checked. [2022-03-19 02:23:16,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:23:16,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421025221] [2022-03-19 02:23:16,299 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421025221] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:23:16,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170380513] [2022-03-19 02:23:16,299 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 02:23:16,299 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:23:16,299 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:23:16,300 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) [2022-03-19 02:23:16,300 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-03-19 02:23:16,702 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 02:23:16,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:23:16,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 1358 conjuncts, 50 conjunts are in the unsatisfiable core [2022-03-19 02:23:16,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:23:17,219 INFO L134 CoverageAnalysis]: Checked inductivity of 8040 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 5736 trivial. 0 not checked. [2022-03-19 02:23:17,219 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:23:19,879 INFO L134 CoverageAnalysis]: Checked inductivity of 8040 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 5736 trivial. 0 not checked. [2022-03-19 02:23:19,879 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1170380513] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:23:19,880 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:23:19,880 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 51, 51] total 103 [2022-03-19 02:23:19,880 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:23:19,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [814839623] [2022-03-19 02:23:19,880 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [814839623] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:23:19,880 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:23:19,880 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2022-03-19 02:23:19,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484522670] [2022-03-19 02:23:19,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:23:19,880 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-03-19 02:23:19,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:23:19,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-03-19 02:23:19,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5054, Invalid=5452, Unknown=0, NotChecked=0, Total=10506 [2022-03-19 02:23:19,882 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) [2022-03-19 02:23:23,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:23:23,927 INFO L93 Difference]: Finished difference Result 2212 states and 3248 transitions. [2022-03-19 02:23:23,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-03-19 02:23:23,928 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 [2022-03-19 02:23:23,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:23:23,930 INFO L225 Difference]: With dead ends: 2212 [2022-03-19 02:23:23,930 INFO L226 Difference]: Without dead ends: 1185 [2022-03-19 02:23:23,933 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 822 GetRequests, 670 SyntacticMatches, 0 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1658 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=10161, Invalid=13401, Unknown=0, NotChecked=0, Total=23562 [2022-03-19 02:23:23,933 INFO L912 BasicCegarLoop]: 43 mSDtfsCounter, 2748 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 2668 mSolverCounterSat, 1265 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s 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, 1.7s IncrementalHoareTripleChecker+Time [2022-03-19 02:23:23,933 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2752 Valid, 49 Invalid, 3933 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1265 Valid, 2668 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-03-19 02:23:23,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1185 states. [2022-03-19 02:23:24,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1185 to 1153. [2022-03-19 02:23:24,328 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) [2022-03-19 02:23:24,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1153 states to 1153 states and 1644 transitions. [2022-03-19 02:23:24,330 INFO L78 Accepts]: Start accepts. Automaton has 1153 states and 1644 transitions. Word has length 358 [2022-03-19 02:23:24,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:23:24,330 INFO L478 AbstractCegarLoop]: Abstraction has 1153 states and 1644 transitions. [2022-03-19 02:23:24,331 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) [2022-03-19 02:23:24,331 INFO L276 IsEmpty]: Start isEmpty. Operand 1153 states and 1644 transitions. [2022-03-19 02:23:24,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 366 [2022-03-19 02:23:24,334 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:23:24,335 INFO L500 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] [2022-03-19 02:23:24,361 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-03-19 02:23:24,547 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 [2022-03-19 02:23:24,547 INFO L403 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:23:24,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:23:24,548 INFO L85 PathProgramCache]: Analyzing trace with hash -758414679, now seen corresponding path program 95 times [2022-03-19 02:23:24,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:23:24,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1633575731] [2022-03-19 02:23:24,549 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:23:24,549 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:23:24,549 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:23:24,549 INFO L85 PathProgramCache]: Analyzing trace with hash -758414679, now seen corresponding path program 96 times [2022-03-19 02:23:24,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:23:24,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121943780] [2022-03-19 02:23:24,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:23:24,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:23:24,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:23:25,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:23:25,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:23:25,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 350 [2022-03-19 02:23:25,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:23:25,562 INFO L134 CoverageAnalysis]: Checked inductivity of 8379 backedges. 0 proven. 2401 refuted. 0 times theorem prover too weak. 5978 trivial. 0 not checked. [2022-03-19 02:23:25,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:23:25,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121943780] [2022-03-19 02:23:25,562 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121943780] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:23:25,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480473169] [2022-03-19 02:23:25,563 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 02:23:25,563 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:23:25,563 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:23:25,565 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) [2022-03-19 02:23:25,566 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-03-19 02:23:25,873 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-19 02:23:25,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:23:25,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-19 02:23:25,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:23:26,365 INFO L134 CoverageAnalysis]: Checked inductivity of 8379 backedges. 193 proven. 1 refuted. 0 times theorem prover too weak. 8185 trivial. 0 not checked. [2022-03-19 02:23:26,365 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:23:26,826 INFO L134 CoverageAnalysis]: Checked inductivity of 8379 backedges. 193 proven. 1 refuted. 0 times theorem prover too weak. 8185 trivial. 0 not checked. [2022-03-19 02:23:26,826 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1480473169] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:23:26,826 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:23:26,826 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 7, 7] total 62 [2022-03-19 02:23:26,826 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:23:26,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1633575731] [2022-03-19 02:23:26,827 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1633575731] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:23:26,827 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:23:26,827 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [54] imperfect sequences [] total 54 [2022-03-19 02:23:26,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63876073] [2022-03-19 02:23:26,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:23:26,827 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-03-19 02:23:26,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:23:26,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-03-19 02:23:26,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1355, Invalid=2427, Unknown=0, NotChecked=0, Total=3782 [2022-03-19 02:23:26,829 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) [2022-03-19 02:23:30,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:23:30,727 INFO L93 Difference]: Finished difference Result 2256 states and 3313 transitions. [2022-03-19 02:23:30,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-03-19 02:23:30,727 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 [2022-03-19 02:23:30,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:23:30,729 INFO L225 Difference]: With dead ends: 2256 [2022-03-19 02:23:30,729 INFO L226 Difference]: Without dead ends: 1208 [2022-03-19 02:23:30,731 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 838 GetRequests, 725 SyntacticMatches, 1 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1923 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=4114, Invalid=8768, Unknown=0, NotChecked=0, Total=12882 [2022-03-19 02:23:30,732 INFO L912 BasicCegarLoop]: 43 mSDtfsCounter, 3045 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 2778 mSolverCounterSat, 1339 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s 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, 1.8s IncrementalHoareTripleChecker+Time [2022-03-19 02:23:30,732 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [3049 Valid, 49 Invalid, 4117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1339 Valid, 2778 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-03-19 02:23:30,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1208 states. [2022-03-19 02:23:31,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1208 to 1176. [2022-03-19 02:23:31,151 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) [2022-03-19 02:23:31,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1176 states to 1176 states and 1677 transitions. [2022-03-19 02:23:31,153 INFO L78 Accepts]: Start accepts. Automaton has 1176 states and 1677 transitions. Word has length 365 [2022-03-19 02:23:31,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:23:31,153 INFO L478 AbstractCegarLoop]: Abstraction has 1176 states and 1677 transitions. [2022-03-19 02:23:31,153 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) [2022-03-19 02:23:31,153 INFO L276 IsEmpty]: Start isEmpty. Operand 1176 states and 1677 transitions. [2022-03-19 02:23:31,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 373 [2022-03-19 02:23:31,157 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:23:31,157 INFO L500 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] [2022-03-19 02:23:31,174 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-03-19 02:23:31,357 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 [2022-03-19 02:23:31,357 INFO L403 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:23:31,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:23:31,358 INFO L85 PathProgramCache]: Analyzing trace with hash 384675463, now seen corresponding path program 97 times [2022-03-19 02:23:31,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:23:31,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [589552066] [2022-03-19 02:23:31,360 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:23:31,360 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:23:31,360 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:23:31,360 INFO L85 PathProgramCache]: Analyzing trace with hash 384675463, now seen corresponding path program 98 times [2022-03-19 02:23:31,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:23:31,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931572640] [2022-03-19 02:23:31,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:23:31,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:23:31,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:23:32,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:23:32,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:23:32,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 357 [2022-03-19 02:23:32,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:23:32,339 INFO L134 CoverageAnalysis]: Checked inductivity of 8725 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 6225 trivial. 0 not checked. [2022-03-19 02:23:32,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:23:32,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931572640] [2022-03-19 02:23:32,339 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931572640] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:23:32,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434308258] [2022-03-19 02:23:32,339 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 02:23:32,339 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:23:32,339 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:23:32,340 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) [2022-03-19 02:23:32,341 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-03-19 02:23:32,758 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 02:23:32,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:23:32,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 1410 conjuncts, 52 conjunts are in the unsatisfiable core [2022-03-19 02:23:32,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:23:33,208 INFO L134 CoverageAnalysis]: Checked inductivity of 8725 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 6225 trivial. 0 not checked. [2022-03-19 02:23:33,209 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:23:36,106 INFO L134 CoverageAnalysis]: Checked inductivity of 8725 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 6225 trivial. 0 not checked. [2022-03-19 02:23:36,106 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1434308258] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:23:36,107 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:23:36,107 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 53, 53] total 107 [2022-03-19 02:23:36,108 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:23:36,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [589552066] [2022-03-19 02:23:36,108 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [589552066] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:23:36,108 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:23:36,108 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [55] imperfect sequences [] total 55 [2022-03-19 02:23:36,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521858241] [2022-03-19 02:23:36,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:23:36,108 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-03-19 02:23:36,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:23:36,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-03-19 02:23:36,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5464, Invalid=5878, Unknown=0, NotChecked=0, Total=11342 [2022-03-19 02:23:36,110 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) [2022-03-19 02:23:40,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:23:40,550 INFO L93 Difference]: Finished difference Result 2300 states and 3378 transitions. [2022-03-19 02:23:40,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-03-19 02:23:40,551 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 [2022-03-19 02:23:40,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:23:40,554 INFO L225 Difference]: With dead ends: 2300 [2022-03-19 02:23:40,554 INFO L226 Difference]: Without dead ends: 1231 [2022-03-19 02:23:40,557 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 854 GetRequests, 696 SyntacticMatches, 0 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1777 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=10983, Invalid=14457, Unknown=0, NotChecked=0, Total=25440 [2022-03-19 02:23:40,557 INFO L912 BasicCegarLoop]: 43 mSDtfsCounter, 3237 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 2693 mSolverCounterSat, 1434 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s 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, 1.8s IncrementalHoareTripleChecker+Time [2022-03-19 02:23:40,557 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [3241 Valid, 47 Invalid, 4127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1434 Valid, 2693 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-03-19 02:23:40,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1231 states. [2022-03-19 02:23:41,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1231 to 1199. [2022-03-19 02:23:41,099 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) [2022-03-19 02:23:41,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1199 states to 1199 states and 1710 transitions. [2022-03-19 02:23:41,101 INFO L78 Accepts]: Start accepts. Automaton has 1199 states and 1710 transitions. Word has length 372 [2022-03-19 02:23:41,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:23:41,101 INFO L478 AbstractCegarLoop]: Abstraction has 1199 states and 1710 transitions. [2022-03-19 02:23:41,101 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) [2022-03-19 02:23:41,101 INFO L276 IsEmpty]: Start isEmpty. Operand 1199 states and 1710 transitions. [2022-03-19 02:23:41,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 380 [2022-03-19 02:23:41,104 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:23:41,104 INFO L500 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] [2022-03-19 02:23:41,123 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2022-03-19 02:23:41,304 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 [2022-03-19 02:23:41,305 INFO L403 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:23:41,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:23:41,305 INFO L85 PathProgramCache]: Analyzing trace with hash 315299301, now seen corresponding path program 99 times [2022-03-19 02:23:41,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:23:41,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1610019903] [2022-03-19 02:23:41,306 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:23:41,306 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:23:41,306 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:23:41,306 INFO L85 PathProgramCache]: Analyzing trace with hash 315299301, now seen corresponding path program 100 times [2022-03-19 02:23:41,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:23:41,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059838794] [2022-03-19 02:23:41,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:23:41,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:23:41,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:23:42,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:23:42,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:23:42,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 364 [2022-03-19 02:23:42,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:23:42,303 INFO L134 CoverageAnalysis]: Checked inductivity of 9078 backedges. 0 proven. 2601 refuted. 0 times theorem prover too weak. 6477 trivial. 0 not checked. [2022-03-19 02:23:42,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:23:42,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059838794] [2022-03-19 02:23:42,303 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059838794] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:23:42,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610201695] [2022-03-19 02:23:42,303 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 02:23:42,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:23:42,303 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:23:42,304 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) [2022-03-19 02:23:42,305 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-03-19 02:23:42,723 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 02:23:42,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:23:42,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 1436 conjuncts, 53 conjunts are in the unsatisfiable core [2022-03-19 02:23:42,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:23:43,176 INFO L134 CoverageAnalysis]: Checked inductivity of 9078 backedges. 0 proven. 2601 refuted. 0 times theorem prover too weak. 6477 trivial. 0 not checked. [2022-03-19 02:23:43,176 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:23:46,057 INFO L134 CoverageAnalysis]: Checked inductivity of 9078 backedges. 0 proven. 2601 refuted. 0 times theorem prover too weak. 6477 trivial. 0 not checked. [2022-03-19 02:23:46,058 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [610201695] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:23:46,058 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:23:46,058 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 54, 54] total 109 [2022-03-19 02:23:46,058 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:23:46,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1610019903] [2022-03-19 02:23:46,058 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1610019903] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:23:46,058 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:23:46,058 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [56] imperfect sequences [] total 56 [2022-03-19 02:23:46,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204802926] [2022-03-19 02:23:46,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:23:46,059 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-03-19 02:23:46,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:23:46,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-03-19 02:23:46,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5675, Invalid=6097, Unknown=0, NotChecked=0, Total=11772 [2022-03-19 02:23:46,061 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) [2022-03-19 02:23:50,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:23:50,581 INFO L93 Difference]: Finished difference Result 2344 states and 3443 transitions. [2022-03-19 02:23:50,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-03-19 02:23:50,582 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 [2022-03-19 02:23:50,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:23:50,585 INFO L225 Difference]: With dead ends: 2344 [2022-03-19 02:23:50,585 INFO L226 Difference]: Without dead ends: 1254 [2022-03-19 02:23:50,587 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 870 GetRequests, 709 SyntacticMatches, 0 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1838 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=11406, Invalid=15000, Unknown=0, NotChecked=0, Total=26406 [2022-03-19 02:23:50,587 INFO L912 BasicCegarLoop]: 43 mSDtfsCounter, 2966 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 3011 mSolverCounterSat, 1317 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s 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, 1.8s IncrementalHoareTripleChecker+Time [2022-03-19 02:23:50,588 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2970 Valid, 49 Invalid, 4328 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1317 Valid, 3011 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-03-19 02:23:50,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1254 states. [2022-03-19 02:23:51,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1254 to 1222. [2022-03-19 02:23:51,034 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) [2022-03-19 02:23:51,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1222 states to 1222 states and 1743 transitions. [2022-03-19 02:23:51,036 INFO L78 Accepts]: Start accepts. Automaton has 1222 states and 1743 transitions. Word has length 379 [2022-03-19 02:23:51,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:23:51,036 INFO L478 AbstractCegarLoop]: Abstraction has 1222 states and 1743 transitions. [2022-03-19 02:23:51,036 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) [2022-03-19 02:23:51,036 INFO L276 IsEmpty]: Start isEmpty. Operand 1222 states and 1743 transitions. [2022-03-19 02:23:51,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 387 [2022-03-19 02:23:51,039 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:23:51,039 INFO L500 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] [2022-03-19 02:23:51,059 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2022-03-19 02:23:51,240 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 [2022-03-19 02:23:51,240 INFO L403 AbstractCegarLoop]: === Iteration 55 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:23:51,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:23:51,240 INFO L85 PathProgramCache]: Analyzing trace with hash -2096923317, now seen corresponding path program 101 times [2022-03-19 02:23:51,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:23:51,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [846568880] [2022-03-19 02:23:51,242 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:23:51,242 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:23:51,242 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:23:51,242 INFO L85 PathProgramCache]: Analyzing trace with hash -2096923317, now seen corresponding path program 102 times [2022-03-19 02:23:51,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:23:51,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418799740] [2022-03-19 02:23:51,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:23:51,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:23:51,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:23:52,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:23:52,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:23:52,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 371 [2022-03-19 02:23:52,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:23:52,285 INFO L134 CoverageAnalysis]: Checked inductivity of 9438 backedges. 0 proven. 2704 refuted. 0 times theorem prover too weak. 6734 trivial. 0 not checked. [2022-03-19 02:23:52,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:23:52,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418799740] [2022-03-19 02:23:52,285 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418799740] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:23:52,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1905527986] [2022-03-19 02:23:52,285 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 02:23:52,285 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:23:52,285 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:23:52,287 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) [2022-03-19 02:23:52,288 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-03-19 02:23:52,617 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-19 02:23:52,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:23:52,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-19 02:23:52,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:23:53,126 INFO L134 CoverageAnalysis]: Checked inductivity of 9438 backedges. 205 proven. 1 refuted. 0 times theorem prover too weak. 9232 trivial. 0 not checked. [2022-03-19 02:23:53,126 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:23:53,590 INFO L134 CoverageAnalysis]: Checked inductivity of 9438 backedges. 205 proven. 1 refuted. 0 times theorem prover too weak. 9232 trivial. 0 not checked. [2022-03-19 02:23:53,590 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1905527986] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:23:53,590 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:23:53,590 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 7, 7] total 65 [2022-03-19 02:23:53,590 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:23:53,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [846568880] [2022-03-19 02:23:53,591 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [846568880] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:23:53,591 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:23:53,591 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [57] imperfect sequences [] total 57 [2022-03-19 02:23:53,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311080629] [2022-03-19 02:23:53,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:23:53,591 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-03-19 02:23:53,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:23:53,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-03-19 02:23:53,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1514, Invalid=2646, Unknown=0, NotChecked=0, Total=4160 [2022-03-19 02:23:53,593 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) [2022-03-19 02:23:57,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:23:57,909 INFO L93 Difference]: Finished difference Result 2388 states and 3508 transitions. [2022-03-19 02:23:57,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-03-19 02:23:57,910 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 [2022-03-19 02:23:57,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:23:57,913 INFO L225 Difference]: With dead ends: 2388 [2022-03-19 02:23:57,913 INFO L226 Difference]: Without dead ends: 1277 [2022-03-19 02:23:57,915 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 886 GetRequests, 767 SyntacticMatches, 1 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2118 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=4597, Invalid=9683, Unknown=0, NotChecked=0, Total=14280 [2022-03-19 02:23:57,916 INFO L912 BasicCegarLoop]: 43 mSDtfsCounter, 3038 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 2996 mSolverCounterSat, 1397 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s 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, 1.9s IncrementalHoareTripleChecker+Time [2022-03-19 02:23:57,916 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [3042 Valid, 53 Invalid, 4393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1397 Valid, 2996 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-03-19 02:23:57,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1277 states. [2022-03-19 02:23:58,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1277 to 1245. [2022-03-19 02:23:58,390 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) [2022-03-19 02:23:58,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1245 states to 1245 states and 1776 transitions. [2022-03-19 02:23:58,392 INFO L78 Accepts]: Start accepts. Automaton has 1245 states and 1776 transitions. Word has length 386 [2022-03-19 02:23:58,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:23:58,392 INFO L478 AbstractCegarLoop]: Abstraction has 1245 states and 1776 transitions. [2022-03-19 02:23:58,392 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) [2022-03-19 02:23:58,392 INFO L276 IsEmpty]: Start isEmpty. Operand 1245 states and 1776 transitions. [2022-03-19 02:23:58,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 394 [2022-03-19 02:23:58,395 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:23:58,395 INFO L500 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] [2022-03-19 02:23:58,413 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2022-03-19 02:23:58,596 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 [2022-03-19 02:23:58,596 INFO L403 AbstractCegarLoop]: === Iteration 56 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:23:58,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:23:58,596 INFO L85 PathProgramCache]: Analyzing trace with hash -529001183, now seen corresponding path program 103 times [2022-03-19 02:23:58,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:23:58,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1571681555] [2022-03-19 02:23:58,598 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:23:58,598 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:23:58,598 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:23:58,598 INFO L85 PathProgramCache]: Analyzing trace with hash -529001183, now seen corresponding path program 104 times [2022-03-19 02:23:58,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:23:58,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553586796] [2022-03-19 02:23:58,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:23:58,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:23:58,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:23:59,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:23:59,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:23:59,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 378 [2022-03-19 02:23:59,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:23:59,673 INFO L134 CoverageAnalysis]: Checked inductivity of 9805 backedges. 0 proven. 2809 refuted. 0 times theorem prover too weak. 6996 trivial. 0 not checked. [2022-03-19 02:23:59,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:23:59,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553586796] [2022-03-19 02:23:59,673 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553586796] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:23:59,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [631470725] [2022-03-19 02:23:59,673 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 02:23:59,674 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:23:59,674 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:23:59,675 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) [2022-03-19 02:23:59,676 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-03-19 02:24:00,115 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 02:24:00,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:24:00,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 1488 conjuncts, 55 conjunts are in the unsatisfiable core [2022-03-19 02:24:00,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:24:00,560 INFO L134 CoverageAnalysis]: Checked inductivity of 9805 backedges. 0 proven. 2809 refuted. 0 times theorem prover too weak. 6996 trivial. 0 not checked. [2022-03-19 02:24:00,560 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:24:03,718 INFO L134 CoverageAnalysis]: Checked inductivity of 9805 backedges. 0 proven. 2809 refuted. 0 times theorem prover too weak. 6996 trivial. 0 not checked. [2022-03-19 02:24:03,719 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [631470725] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:24:03,719 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:24:03,719 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 56, 56] total 113 [2022-03-19 02:24:03,719 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:24:03,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1571681555] [2022-03-19 02:24:03,719 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1571681555] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:24:03,719 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:24:03,719 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [58] imperfect sequences [] total 58 [2022-03-19 02:24:03,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661280192] [2022-03-19 02:24:03,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:24:03,719 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-03-19 02:24:03,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:24:03,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-03-19 02:24:03,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6109, Invalid=6547, Unknown=0, NotChecked=0, Total=12656 [2022-03-19 02:24:03,722 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) [2022-03-19 02:24:08,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:24:08,584 INFO L93 Difference]: Finished difference Result 2432 states and 3573 transitions. [2022-03-19 02:24:08,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-03-19 02:24:08,584 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 [2022-03-19 02:24:08,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:24:08,587 INFO L225 Difference]: With dead ends: 2432 [2022-03-19 02:24:08,587 INFO L226 Difference]: Without dead ends: 1300 [2022-03-19 02:24:08,589 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 902 GetRequests, 735 SyntacticMatches, 0 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1963 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=12276, Invalid=16116, Unknown=0, NotChecked=0, Total=28392 [2022-03-19 02:24:08,590 INFO L912 BasicCegarLoop]: 43 mSDtfsCounter, 3112 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 3177 mSolverCounterSat, 1374 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s 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, 1.9s IncrementalHoareTripleChecker+Time [2022-03-19 02:24:08,590 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [3116 Valid, 49 Invalid, 4551 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1374 Valid, 3177 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-03-19 02:24:08,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1300 states. [2022-03-19 02:24:09,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1300 to 1268. [2022-03-19 02:24:09,068 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) [2022-03-19 02:24:09,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1268 states to 1268 states and 1809 transitions. [2022-03-19 02:24:09,069 INFO L78 Accepts]: Start accepts. Automaton has 1268 states and 1809 transitions. Word has length 393 [2022-03-19 02:24:09,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:24:09,069 INFO L478 AbstractCegarLoop]: Abstraction has 1268 states and 1809 transitions. [2022-03-19 02:24:09,069 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) [2022-03-19 02:24:09,070 INFO L276 IsEmpty]: Start isEmpty. Operand 1268 states and 1809 transitions. [2022-03-19 02:24:09,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 401 [2022-03-19 02:24:09,073 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:24:09,073 INFO L500 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] [2022-03-19 02:24:09,092 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2022-03-19 02:24:09,273 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 [2022-03-19 02:24:09,273 INFO L403 AbstractCegarLoop]: === Iteration 57 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:24:09,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:24:09,274 INFO L85 PathProgramCache]: Analyzing trace with hash 1210810383, now seen corresponding path program 105 times [2022-03-19 02:24:09,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:24:09,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1083128573] [2022-03-19 02:24:09,275 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:24:09,275 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:24:09,276 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:24:09,276 INFO L85 PathProgramCache]: Analyzing trace with hash 1210810383, now seen corresponding path program 106 times [2022-03-19 02:24:09,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:24:09,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951773929] [2022-03-19 02:24:09,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:24:09,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:24:09,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:24:10,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:24:10,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:24:10,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 385 [2022-03-19 02:24:10,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:24:10,407 INFO L134 CoverageAnalysis]: Checked inductivity of 10179 backedges. 0 proven. 2916 refuted. 0 times theorem prover too weak. 7263 trivial. 0 not checked. [2022-03-19 02:24:10,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:24:10,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951773929] [2022-03-19 02:24:10,407 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951773929] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:24:10,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019953550] [2022-03-19 02:24:10,407 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 02:24:10,407 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:24:10,407 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:24:10,408 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) [2022-03-19 02:24:10,409 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-03-19 02:24:10,872 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 02:24:10,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:24:10,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 1514 conjuncts, 56 conjunts are in the unsatisfiable core [2022-03-19 02:24:10,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:24:11,362 INFO L134 CoverageAnalysis]: Checked inductivity of 10179 backedges. 0 proven. 2916 refuted. 0 times theorem prover too weak. 7263 trivial. 0 not checked. [2022-03-19 02:24:11,362 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:24:14,605 INFO L134 CoverageAnalysis]: Checked inductivity of 10179 backedges. 0 proven. 2916 refuted. 0 times theorem prover too weak. 7263 trivial. 0 not checked. [2022-03-19 02:24:14,605 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2019953550] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:24:14,605 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:24:14,605 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 57, 57] total 115 [2022-03-19 02:24:14,606 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:24:14,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1083128573] [2022-03-19 02:24:14,606 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1083128573] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:24:14,606 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:24:14,606 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [59] imperfect sequences [] total 59 [2022-03-19 02:24:14,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479528018] [2022-03-19 02:24:14,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:24:14,606 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-03-19 02:24:14,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:24:14,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-03-19 02:24:14,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6332, Invalid=6778, Unknown=0, NotChecked=0, Total=13110 [2022-03-19 02:24:14,608 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) [2022-03-19 02:24:19,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:24:19,707 INFO L93 Difference]: Finished difference Result 2476 states and 3638 transitions. [2022-03-19 02:24:19,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-03-19 02:24:19,707 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 [2022-03-19 02:24:19,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:24:19,710 INFO L225 Difference]: With dead ends: 2476 [2022-03-19 02:24:19,710 INFO L226 Difference]: Without dead ends: 1323 [2022-03-19 02:24:19,713 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 918 GetRequests, 748 SyntacticMatches, 0 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2027 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=12723, Invalid=16689, Unknown=0, NotChecked=0, Total=29412 [2022-03-19 02:24:19,713 INFO L912 BasicCegarLoop]: 43 mSDtfsCounter, 2878 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 3455 mSolverCounterSat, 1283 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s 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, 2.0s IncrementalHoareTripleChecker+Time [2022-03-19 02:24:19,713 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2882 Valid, 57 Invalid, 4738 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1283 Valid, 3455 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-03-19 02:24:19,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1323 states. [2022-03-19 02:24:20,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1323 to 1291. [2022-03-19 02:24:20,204 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) [2022-03-19 02:24:20,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1291 states to 1291 states and 1842 transitions. [2022-03-19 02:24:20,205 INFO L78 Accepts]: Start accepts. Automaton has 1291 states and 1842 transitions. Word has length 400 [2022-03-19 02:24:20,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:24:20,206 INFO L478 AbstractCegarLoop]: Abstraction has 1291 states and 1842 transitions. [2022-03-19 02:24:20,206 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) [2022-03-19 02:24:20,206 INFO L276 IsEmpty]: Start isEmpty. Operand 1291 states and 1842 transitions. [2022-03-19 02:24:20,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 408 [2022-03-19 02:24:20,210 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:24:20,210 INFO L500 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] [2022-03-19 02:24:20,231 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2022-03-19 02:24:20,416 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 [2022-03-19 02:24:20,416 INFO L403 AbstractCegarLoop]: === Iteration 58 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:24:20,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:24:20,416 INFO L85 PathProgramCache]: Analyzing trace with hash -1624031139, now seen corresponding path program 107 times [2022-03-19 02:24:20,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:24:20,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1026345916] [2022-03-19 02:24:20,418 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:24:20,418 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:24:20,418 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:24:20,418 INFO L85 PathProgramCache]: Analyzing trace with hash -1624031139, now seen corresponding path program 108 times [2022-03-19 02:24:20,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:24:20,418 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203661943] [2022-03-19 02:24:20,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:24:20,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:24:20,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:24:21,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:24:21,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:24:21,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 392 [2022-03-19 02:24:21,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:24:21,592 INFO L134 CoverageAnalysis]: Checked inductivity of 10560 backedges. 0 proven. 3025 refuted. 0 times theorem prover too weak. 7535 trivial. 0 not checked. [2022-03-19 02:24:21,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:24:21,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203661943] [2022-03-19 02:24:21,592 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203661943] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:24:21,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428967444] [2022-03-19 02:24:21,592 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 02:24:21,592 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:24:21,593 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:24:21,595 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) [2022-03-19 02:24:21,595 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-03-19 02:24:21,963 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-19 02:24:21,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:24:21,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-19 02:24:21,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:24:22,508 INFO L134 CoverageAnalysis]: Checked inductivity of 10560 backedges. 217 proven. 1 refuted. 0 times theorem prover too weak. 10342 trivial. 0 not checked. [2022-03-19 02:24:22,508 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:24:22,997 INFO L134 CoverageAnalysis]: Checked inductivity of 10560 backedges. 217 proven. 1 refuted. 0 times theorem prover too weak. 10342 trivial. 0 not checked. [2022-03-19 02:24:22,997 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [428967444] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:24:22,997 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:24:22,997 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 7, 7] total 68 [2022-03-19 02:24:22,997 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:24:22,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1026345916] [2022-03-19 02:24:22,997 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1026345916] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:24:22,997 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:24:22,997 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [60] imperfect sequences [] total 60 [2022-03-19 02:24:22,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215946624] [2022-03-19 02:24:22,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:24:22,998 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-03-19 02:24:22,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:24:22,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-03-19 02:24:22,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1682, Invalid=2874, Unknown=0, NotChecked=0, Total=4556 [2022-03-19 02:24:22,999 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) [2022-03-19 02:24:27,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:24:27,767 INFO L93 Difference]: Finished difference Result 2520 states and 3703 transitions. [2022-03-19 02:24:27,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-03-19 02:24:27,768 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 [2022-03-19 02:24:27,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:24:27,772 INFO L225 Difference]: With dead ends: 2520 [2022-03-19 02:24:27,772 INFO L226 Difference]: Without dead ends: 1346 [2022-03-19 02:24:27,778 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 934 GetRequests, 809 SyntacticMatches, 1 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2322 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=5107, Invalid=10643, Unknown=0, NotChecked=0, Total=15750 [2022-03-19 02:24:27,779 INFO L912 BasicCegarLoop]: 43 mSDtfsCounter, 3339 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 3192 mSolverCounterSat, 1532 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s 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, 2.0s IncrementalHoareTripleChecker+Time [2022-03-19 02:24:27,779 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [3343 Valid, 57 Invalid, 4724 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1532 Valid, 3192 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-03-19 02:24:27,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1346 states. [2022-03-19 02:24:28,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1346 to 1314. [2022-03-19 02:24:28,465 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) [2022-03-19 02:24:28,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1314 states to 1314 states and 1875 transitions. [2022-03-19 02:24:28,467 INFO L78 Accepts]: Start accepts. Automaton has 1314 states and 1875 transitions. Word has length 407 [2022-03-19 02:24:28,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:24:28,467 INFO L478 AbstractCegarLoop]: Abstraction has 1314 states and 1875 transitions. [2022-03-19 02:24:28,467 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) [2022-03-19 02:24:28,467 INFO L276 IsEmpty]: Start isEmpty. Operand 1314 states and 1875 transitions. [2022-03-19 02:24:28,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 415 [2022-03-19 02:24:28,471 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:24:28,471 INFO L500 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] [2022-03-19 02:24:28,489 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2022-03-19 02:24:28,671 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 [2022-03-19 02:24:28,671 INFO L403 AbstractCegarLoop]: === Iteration 59 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:24:28,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:24:28,672 INFO L85 PathProgramCache]: Analyzing trace with hash -708512045, now seen corresponding path program 109 times [2022-03-19 02:24:28,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:24:28,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [38493960] [2022-03-19 02:24:28,673 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:24:28,673 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:24:28,673 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:24:28,673 INFO L85 PathProgramCache]: Analyzing trace with hash -708512045, now seen corresponding path program 110 times [2022-03-19 02:24:28,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:24:28,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763779531] [2022-03-19 02:24:28,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:24:28,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:24:28,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:24:29,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:24:29,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:24:29,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 399 [2022-03-19 02:24:29,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:24:29,835 INFO L134 CoverageAnalysis]: Checked inductivity of 10948 backedges. 0 proven. 3136 refuted. 0 times theorem prover too weak. 7812 trivial. 0 not checked. [2022-03-19 02:24:29,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:24:29,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763779531] [2022-03-19 02:24:29,835 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763779531] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:24:29,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116595355] [2022-03-19 02:24:29,835 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 02:24:29,835 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:24:29,835 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:24:29,836 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) [2022-03-19 02:24:29,837 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-03-19 02:24:30,319 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 02:24:30,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:24:30,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 1566 conjuncts, 58 conjunts are in the unsatisfiable core [2022-03-19 02:24:30,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:24:30,800 INFO L134 CoverageAnalysis]: Checked inductivity of 10948 backedges. 0 proven. 3136 refuted. 0 times theorem prover too weak. 7812 trivial. 0 not checked. [2022-03-19 02:24:30,800 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:24:34,220 INFO L134 CoverageAnalysis]: Checked inductivity of 10948 backedges. 0 proven. 3136 refuted. 0 times theorem prover too weak. 7812 trivial. 0 not checked. [2022-03-19 02:24:34,220 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2116595355] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:24:34,220 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:24:34,221 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 59, 59] total 119 [2022-03-19 02:24:34,221 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:24:34,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [38493960] [2022-03-19 02:24:34,221 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [38493960] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:24:34,221 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:24:34,221 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [61] imperfect sequences [] total 61 [2022-03-19 02:24:34,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235427257] [2022-03-19 02:24:34,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:24:34,221 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-03-19 02:24:34,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:24:34,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-03-19 02:24:34,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6790, Invalid=7252, Unknown=0, NotChecked=0, Total=14042 [2022-03-19 02:24:34,224 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) [2022-03-19 02:24:39,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:24:39,478 INFO L93 Difference]: Finished difference Result 2564 states and 3768 transitions. [2022-03-19 02:24:39,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-03-19 02:24:39,479 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 [2022-03-19 02:24:39,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:24:39,481 INFO L225 Difference]: With dead ends: 2564 [2022-03-19 02:24:39,481 INFO L226 Difference]: Without dead ends: 1369 [2022-03-19 02:24:39,484 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 950 GetRequests, 774 SyntacticMatches, 0 SemanticMatches, 176 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2158 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=13641, Invalid=17865, Unknown=0, NotChecked=0, Total=31506 [2022-03-19 02:24:39,484 INFO L912 BasicCegarLoop]: 43 mSDtfsCounter, 3477 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 3156 mSolverCounterSat, 1615 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s 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, 2.0s IncrementalHoareTripleChecker+Time [2022-03-19 02:24:39,484 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [3481 Valid, 51 Invalid, 4771 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1615 Valid, 3156 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-03-19 02:24:39,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1369 states. [2022-03-19 02:24:40,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1369 to 1337. [2022-03-19 02:24:40,038 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) [2022-03-19 02:24:40,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1337 states to 1337 states and 1908 transitions. [2022-03-19 02:24:40,040 INFO L78 Accepts]: Start accepts. Automaton has 1337 states and 1908 transitions. Word has length 414 [2022-03-19 02:24:40,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:24:40,040 INFO L478 AbstractCegarLoop]: Abstraction has 1337 states and 1908 transitions. [2022-03-19 02:24:40,040 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) [2022-03-19 02:24:40,041 INFO L276 IsEmpty]: Start isEmpty. Operand 1337 states and 1908 transitions. [2022-03-19 02:24:40,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 422 [2022-03-19 02:24:40,044 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:24:40,044 INFO L500 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] [2022-03-19 02:24:40,064 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2022-03-19 02:24:40,244 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 [2022-03-19 02:24:40,244 INFO L403 AbstractCegarLoop]: === Iteration 60 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:24:40,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:24:40,245 INFO L85 PathProgramCache]: Analyzing trace with hash -472033383, now seen corresponding path program 111 times [2022-03-19 02:24:40,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:24:40,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1674545362] [2022-03-19 02:24:40,246 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:24:40,246 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:24:40,246 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:24:40,246 INFO L85 PathProgramCache]: Analyzing trace with hash -472033383, now seen corresponding path program 112 times [2022-03-19 02:24:40,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:24:40,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202367467] [2022-03-19 02:24:40,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:24:40,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:24:40,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:24:41,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:24:41,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:24:41,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 406 [2022-03-19 02:24:41,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:24:41,486 INFO L134 CoverageAnalysis]: Checked inductivity of 11343 backedges. 0 proven. 3249 refuted. 0 times theorem prover too weak. 8094 trivial. 0 not checked. [2022-03-19 02:24:41,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:24:41,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202367467] [2022-03-19 02:24:41,487 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202367467] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:24:41,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309995306] [2022-03-19 02:24:41,487 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 02:24:41,487 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:24:41,487 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:24:41,488 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) [2022-03-19 02:24:41,489 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-03-19 02:24:41,984 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 02:24:41,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:24:41,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 1592 conjuncts, 59 conjunts are in the unsatisfiable core [2022-03-19 02:24:41,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:24:42,457 INFO L134 CoverageAnalysis]: Checked inductivity of 11343 backedges. 0 proven. 3249 refuted. 0 times theorem prover too weak. 8094 trivial. 0 not checked. [2022-03-19 02:24:42,458 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:24:45,984 INFO L134 CoverageAnalysis]: Checked inductivity of 11343 backedges. 0 proven. 3249 refuted. 0 times theorem prover too weak. 8094 trivial. 0 not checked. [2022-03-19 02:24:45,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [309995306] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:24:45,984 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:24:45,984 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 60, 60] total 121 [2022-03-19 02:24:45,984 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:24:45,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1674545362] [2022-03-19 02:24:45,985 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1674545362] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:24:45,985 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:24:45,985 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [62] imperfect sequences [] total 62 [2022-03-19 02:24:45,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402921714] [2022-03-19 02:24:45,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:24:45,985 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-03-19 02:24:45,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:24:45,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-03-19 02:24:45,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7025, Invalid=7495, Unknown=0, NotChecked=0, Total=14520 [2022-03-19 02:24:45,987 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) [2022-03-19 02:24:51,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:24:51,570 INFO L93 Difference]: Finished difference Result 2608 states and 3833 transitions. [2022-03-19 02:24:51,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-03-19 02:24:51,571 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 [2022-03-19 02:24:51,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:24:51,575 INFO L225 Difference]: With dead ends: 2608 [2022-03-19 02:24:51,575 INFO L226 Difference]: Without dead ends: 1392 [2022-03-19 02:24:51,579 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 966 GetRequests, 787 SyntacticMatches, 0 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2225 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=14112, Invalid=18468, Unknown=0, NotChecked=0, Total=32580 [2022-03-19 02:24:51,579 INFO L912 BasicCegarLoop]: 43 mSDtfsCounter, 3559 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 3184 mSolverCounterSat, 1618 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s 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, 2.0s IncrementalHoareTripleChecker+Time [2022-03-19 02:24:51,579 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [3563 Valid, 51 Invalid, 4802 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1618 Valid, 3184 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-03-19 02:24:51,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1392 states. [2022-03-19 02:24:52,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1392 to 1360. [2022-03-19 02:24:52,304 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) [2022-03-19 02:24:52,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1360 states to 1360 states and 1941 transitions. [2022-03-19 02:24:52,305 INFO L78 Accepts]: Start accepts. Automaton has 1360 states and 1941 transitions. Word has length 421 [2022-03-19 02:24:52,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:24:52,305 INFO L478 AbstractCegarLoop]: Abstraction has 1360 states and 1941 transitions. [2022-03-19 02:24:52,306 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) [2022-03-19 02:24:52,306 INFO L276 IsEmpty]: Start isEmpty. Operand 1360 states and 1941 transitions. [2022-03-19 02:24:52,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 429 [2022-03-19 02:24:52,309 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:24:52,309 INFO L500 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] [2022-03-19 02:24:52,329 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2022-03-19 02:24:52,509 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 [2022-03-19 02:24:52,510 INFO L403 AbstractCegarLoop]: === Iteration 61 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:24:52,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:24:52,510 INFO L85 PathProgramCache]: Analyzing trace with hash 1001333143, now seen corresponding path program 113 times [2022-03-19 02:24:52,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:24:52,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [639559308] [2022-03-19 02:24:52,511 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:24:52,511 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:24:52,511 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:24:52,511 INFO L85 PathProgramCache]: Analyzing trace with hash 1001333143, now seen corresponding path program 114 times [2022-03-19 02:24:52,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:24:52,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267462337] [2022-03-19 02:24:52,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:24:52,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:24:52,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:24:53,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:24:53,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:24:53,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 413 [2022-03-19 02:24:53,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:24:53,758 INFO L134 CoverageAnalysis]: Checked inductivity of 11745 backedges. 0 proven. 3364 refuted. 0 times theorem prover too weak. 8381 trivial. 0 not checked. [2022-03-19 02:24:53,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:24:53,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267462337] [2022-03-19 02:24:53,758 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267462337] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:24:53,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220201113] [2022-03-19 02:24:53,759 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 02:24:53,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:24:53,759 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:24:53,760 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) [2022-03-19 02:24:53,761 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-03-19 02:24:54,145 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-19 02:24:54,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:24:54,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-19 02:24:54,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:24:54,700 INFO L134 CoverageAnalysis]: Checked inductivity of 11745 backedges. 229 proven. 1 refuted. 0 times theorem prover too weak. 11515 trivial. 0 not checked. [2022-03-19 02:24:54,700 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:24:55,225 INFO L134 CoverageAnalysis]: Checked inductivity of 11745 backedges. 229 proven. 1 refuted. 0 times theorem prover too weak. 11515 trivial. 0 not checked. [2022-03-19 02:24:55,226 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1220201113] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:24:55,226 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:24:55,226 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 7, 7] total 71 [2022-03-19 02:24:55,226 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:24:55,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [639559308] [2022-03-19 02:24:55,226 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [639559308] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:24:55,226 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:24:55,227 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [63] imperfect sequences [] total 63 [2022-03-19 02:24:55,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686399872] [2022-03-19 02:24:55,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:24:55,227 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-03-19 02:24:55,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:24:55,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-03-19 02:24:55,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1859, Invalid=3111, Unknown=0, NotChecked=0, Total=4970 [2022-03-19 02:24:55,228 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) [2022-03-19 02:25:00,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:25:00,451 INFO L93 Difference]: Finished difference Result 2652 states and 3898 transitions. [2022-03-19 02:25:00,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-03-19 02:25:00,452 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 [2022-03-19 02:25:00,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:25:00,455 INFO L225 Difference]: With dead ends: 2652 [2022-03-19 02:25:00,455 INFO L226 Difference]: Without dead ends: 1415 [2022-03-19 02:25:00,459 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 982 GetRequests, 851 SyntacticMatches, 1 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2535 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=5644, Invalid=11648, Unknown=0, NotChecked=0, Total=17292 [2022-03-19 02:25:00,459 INFO L912 BasicCegarLoop]: 43 mSDtfsCounter, 3289 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 3590 mSolverCounterSat, 1467 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s 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, 2.1s IncrementalHoareTripleChecker+Time [2022-03-19 02:25:00,459 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [3293 Valid, 59 Invalid, 5057 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1467 Valid, 3590 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-03-19 02:25:00,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1415 states. [2022-03-19 02:25:01,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1415 to 1383. [2022-03-19 02:25:01,103 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) [2022-03-19 02:25:01,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1383 states to 1383 states and 1974 transitions. [2022-03-19 02:25:01,106 INFO L78 Accepts]: Start accepts. Automaton has 1383 states and 1974 transitions. Word has length 428 [2022-03-19 02:25:01,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:25:01,106 INFO L478 AbstractCegarLoop]: Abstraction has 1383 states and 1974 transitions. [2022-03-19 02:25:01,106 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) [2022-03-19 02:25:01,107 INFO L276 IsEmpty]: Start isEmpty. Operand 1383 states and 1974 transitions. [2022-03-19 02:25:01,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 436 [2022-03-19 02:25:01,110 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:25:01,111 INFO L500 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] [2022-03-19 02:25:01,129 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2022-03-19 02:25:01,311 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 [2022-03-19 02:25:01,311 INFO L403 AbstractCegarLoop]: === Iteration 62 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:25:01,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:25:01,311 INFO L85 PathProgramCache]: Analyzing trace with hash -791209259, now seen corresponding path program 115 times [2022-03-19 02:25:01,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:25:01,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [121960589] [2022-03-19 02:25:01,313 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:25:01,313 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:25:01,313 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:25:01,313 INFO L85 PathProgramCache]: Analyzing trace with hash -791209259, now seen corresponding path program 116 times [2022-03-19 02:25:01,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:25:01,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818495364] [2022-03-19 02:25:01,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:25:01,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:25:01,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:25:02,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:25:02,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:25:02,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 420 [2022-03-19 02:25:02,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:25:02,624 INFO L134 CoverageAnalysis]: Checked inductivity of 12154 backedges. 0 proven. 3481 refuted. 0 times theorem prover too weak. 8673 trivial. 0 not checked. [2022-03-19 02:25:02,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:25:02,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818495364] [2022-03-19 02:25:02,624 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818495364] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:25:02,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15706557] [2022-03-19 02:25:02,624 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 02:25:02,624 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:25:02,624 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:25:02,625 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) [2022-03-19 02:25:02,626 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-03-19 02:25:03,156 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 02:25:03,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:25:03,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 1644 conjuncts, 61 conjunts are in the unsatisfiable core [2022-03-19 02:25:03,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:25:03,669 INFO L134 CoverageAnalysis]: Checked inductivity of 12154 backedges. 0 proven. 3481 refuted. 0 times theorem prover too weak. 8673 trivial. 0 not checked. [2022-03-19 02:25:03,669 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:25:07,468 INFO L134 CoverageAnalysis]: Checked inductivity of 12154 backedges. 0 proven. 3481 refuted. 0 times theorem prover too weak. 8673 trivial. 0 not checked. [2022-03-19 02:25:07,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [15706557] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:25:07,468 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:25:07,468 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 62, 62] total 125 [2022-03-19 02:25:07,468 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:25:07,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [121960589] [2022-03-19 02:25:07,469 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [121960589] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:25:07,469 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:25:07,469 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [64] imperfect sequences [] total 64 [2022-03-19 02:25:07,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4908161] [2022-03-19 02:25:07,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:25:07,469 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-03-19 02:25:07,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:25:07,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-03-19 02:25:07,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7507, Invalid=7993, Unknown=0, NotChecked=0, Total=15500 [2022-03-19 02:25:07,472 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) [2022-03-19 02:25:13,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:25:13,374 INFO L93 Difference]: Finished difference Result 2696 states and 3963 transitions. [2022-03-19 02:25:13,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-03-19 02:25:13,375 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 [2022-03-19 02:25:13,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:25:13,377 INFO L225 Difference]: With dead ends: 2696 [2022-03-19 02:25:13,377 INFO L226 Difference]: Without dead ends: 1438 [2022-03-19 02:25:13,380 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 998 GetRequests, 813 SyntacticMatches, 0 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2362 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=15078, Invalid=19704, Unknown=0, NotChecked=0, Total=34782 [2022-03-19 02:25:13,380 INFO L912 BasicCegarLoop]: 43 mSDtfsCounter, 3499 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 3441 mSolverCounterSat, 1641 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s 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, 2.1s IncrementalHoareTripleChecker+Time [2022-03-19 02:25:13,381 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [3503 Valid, 53 Invalid, 5082 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1641 Valid, 3441 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-03-19 02:25:13,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1438 states. [2022-03-19 02:25:13,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1438 to 1406. [2022-03-19 02:25:13,973 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) [2022-03-19 02:25:13,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1406 states to 1406 states and 2007 transitions. [2022-03-19 02:25:13,975 INFO L78 Accepts]: Start accepts. Automaton has 1406 states and 2007 transitions. Word has length 435 [2022-03-19 02:25:13,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:25:13,975 INFO L478 AbstractCegarLoop]: Abstraction has 1406 states and 2007 transitions. [2022-03-19 02:25:13,975 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) [2022-03-19 02:25:13,975 INFO L276 IsEmpty]: Start isEmpty. Operand 1406 states and 2007 transitions. [2022-03-19 02:25:13,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 443 [2022-03-19 02:25:13,979 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:25:13,979 INFO L500 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] [2022-03-19 02:25:14,000 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2022-03-19 02:25:14,181 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 [2022-03-19 02:25:14,181 INFO L403 AbstractCegarLoop]: === Iteration 63 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:25:14,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:25:14,181 INFO L85 PathProgramCache]: Analyzing trace with hash -834060197, now seen corresponding path program 117 times [2022-03-19 02:25:14,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:25:14,181 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [273484264] [2022-03-19 02:25:14,183 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:25:14,183 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:25:14,183 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:25:14,183 INFO L85 PathProgramCache]: Analyzing trace with hash -834060197, now seen corresponding path program 118 times [2022-03-19 02:25:14,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:25:14,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186764091] [2022-03-19 02:25:14,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:25:14,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:25:14,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:25:15,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:25:15,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:25:15,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 427 [2022-03-19 02:25:15,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:25:15,472 INFO L134 CoverageAnalysis]: Checked inductivity of 12570 backedges. 0 proven. 3600 refuted. 0 times theorem prover too weak. 8970 trivial. 0 not checked. [2022-03-19 02:25:15,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:25:15,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186764091] [2022-03-19 02:25:15,473 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186764091] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:25:15,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926588641] [2022-03-19 02:25:15,473 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 02:25:15,473 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:25:15,473 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:25:15,475 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) [2022-03-19 02:25:15,476 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-03-19 02:25:16,019 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 02:25:16,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:25:16,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 1670 conjuncts, 62 conjunts are in the unsatisfiable core [2022-03-19 02:25:16,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:25:16,575 INFO L134 CoverageAnalysis]: Checked inductivity of 12570 backedges. 0 proven. 3600 refuted. 0 times theorem prover too weak. 8970 trivial. 0 not checked. [2022-03-19 02:25:16,575 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:25:20,462 INFO L134 CoverageAnalysis]: Checked inductivity of 12570 backedges. 0 proven. 3600 refuted. 0 times theorem prover too weak. 8970 trivial. 0 not checked. [2022-03-19 02:25:20,463 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1926588641] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:25:20,463 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:25:20,463 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 63, 63] total 127 [2022-03-19 02:25:20,463 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:25:20,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [273484264] [2022-03-19 02:25:20,463 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [273484264] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:25:20,463 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:25:20,463 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [65] imperfect sequences [] total 65 [2022-03-19 02:25:20,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499180119] [2022-03-19 02:25:20,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:25:20,464 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-03-19 02:25:20,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:25:20,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-03-19 02:25:20,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7754, Invalid=8248, Unknown=0, NotChecked=0, Total=16002 [2022-03-19 02:25:20,466 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) [2022-03-19 02:25:26,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:25:26,854 INFO L93 Difference]: Finished difference Result 2740 states and 4028 transitions. [2022-03-19 02:25:26,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-03-19 02:25:26,855 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 [2022-03-19 02:25:26,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:25:26,857 INFO L225 Difference]: With dead ends: 2740 [2022-03-19 02:25:26,857 INFO L226 Difference]: Without dead ends: 1461 [2022-03-19 02:25:26,860 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 1014 GetRequests, 826 SyntacticMatches, 0 SemanticMatches, 188 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2432 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=15573, Invalid=20337, Unknown=0, NotChecked=0, Total=35910 [2022-03-19 02:25:26,860 INFO L912 BasicCegarLoop]: 43 mSDtfsCounter, 3611 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 3686 mSolverCounterSat, 1739 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s 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, 2.2s IncrementalHoareTripleChecker+Time [2022-03-19 02:25:26,861 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [3615 Valid, 53 Invalid, 5425 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1739 Valid, 3686 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-03-19 02:25:26,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1461 states. [2022-03-19 02:25:27,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1461 to 1429. [2022-03-19 02:25:27,455 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) [2022-03-19 02:25:27,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1429 states to 1429 states and 2040 transitions. [2022-03-19 02:25:27,457 INFO L78 Accepts]: Start accepts. Automaton has 1429 states and 2040 transitions. Word has length 442 [2022-03-19 02:25:27,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:25:27,457 INFO L478 AbstractCegarLoop]: Abstraction has 1429 states and 2040 transitions. [2022-03-19 02:25:27,457 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) [2022-03-19 02:25:27,457 INFO L276 IsEmpty]: Start isEmpty. Operand 1429 states and 2040 transitions. [2022-03-19 02:25:27,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 450 [2022-03-19 02:25:27,461 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:25:27,461 INFO L500 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] [2022-03-19 02:25:27,481 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2022-03-19 02:25:27,662 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 [2022-03-19 02:25:27,662 INFO L403 AbstractCegarLoop]: === Iteration 64 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:25:27,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:25:27,662 INFO L85 PathProgramCache]: Analyzing trace with hash 1912687121, now seen corresponding path program 119 times [2022-03-19 02:25:27,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:25:27,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [977276731] [2022-03-19 02:25:27,664 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:25:27,664 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:25:27,664 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:25:27,664 INFO L85 PathProgramCache]: Analyzing trace with hash 1912687121, now seen corresponding path program 120 times [2022-03-19 02:25:27,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:25:27,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636048774] [2022-03-19 02:25:27,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:25:27,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:25:27,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:25:29,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:25:29,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:25:29,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 434 [2022-03-19 02:25:29,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:25:29,028 INFO L134 CoverageAnalysis]: Checked inductivity of 12993 backedges. 0 proven. 3721 refuted. 0 times theorem prover too weak. 9272 trivial. 0 not checked. [2022-03-19 02:25:29,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:25:29,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636048774] [2022-03-19 02:25:29,028 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636048774] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:25:29,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373268775] [2022-03-19 02:25:29,028 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 02:25:29,028 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:25:29,028 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:25:29,029 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) [2022-03-19 02:25:29,031 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-03-19 02:25:29,447 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-19 02:25:29,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:25:29,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-19 02:25:29,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:25:30,028 INFO L134 CoverageAnalysis]: Checked inductivity of 12993 backedges. 241 proven. 1 refuted. 0 times theorem prover too weak. 12751 trivial. 0 not checked. [2022-03-19 02:25:30,029 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:25:30,551 INFO L134 CoverageAnalysis]: Checked inductivity of 12993 backedges. 241 proven. 1 refuted. 0 times theorem prover too weak. 12751 trivial. 0 not checked. [2022-03-19 02:25:30,551 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [373268775] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:25:30,551 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:25:30,552 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 7, 7] total 74 [2022-03-19 02:25:30,552 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:25:30,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [977276731] [2022-03-19 02:25:30,552 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [977276731] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:25:30,552 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:25:30,552 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [66] imperfect sequences [] total 66 [2022-03-19 02:25:30,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036114112] [2022-03-19 02:25:30,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:25:30,553 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-03-19 02:25:30,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:25:30,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-03-19 02:25:30,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2045, Invalid=3357, Unknown=0, NotChecked=0, Total=5402 [2022-03-19 02:25:30,555 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) [2022-03-19 02:25:36,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:25:36,220 INFO L93 Difference]: Finished difference Result 2784 states and 4093 transitions. [2022-03-19 02:25:36,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-03-19 02:25:36,221 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 [2022-03-19 02:25:36,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:25:36,223 INFO L225 Difference]: With dead ends: 2784 [2022-03-19 02:25:36,223 INFO L226 Difference]: Without dead ends: 1484 [2022-03-19 02:25:36,226 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 1030 GetRequests, 893 SyntacticMatches, 1 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2757 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=6208, Invalid=12698, Unknown=0, NotChecked=0, Total=18906 [2022-03-19 02:25:36,227 INFO L912 BasicCegarLoop]: 43 mSDtfsCounter, 3471 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 3818 mSolverCounterSat, 1455 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s 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, 2.2s IncrementalHoareTripleChecker+Time [2022-03-19 02:25:36,227 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [3475 Valid, 61 Invalid, 5273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1455 Valid, 3818 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-03-19 02:25:36,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1484 states. [2022-03-19 02:25:36,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1484 to 1452. [2022-03-19 02:25:36,853 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) [2022-03-19 02:25:36,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1452 states to 1452 states and 2073 transitions. [2022-03-19 02:25:36,855 INFO L78 Accepts]: Start accepts. Automaton has 1452 states and 2073 transitions. Word has length 449 [2022-03-19 02:25:36,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:25:36,856 INFO L478 AbstractCegarLoop]: Abstraction has 1452 states and 2073 transitions. [2022-03-19 02:25:36,856 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) [2022-03-19 02:25:36,856 INFO L276 IsEmpty]: Start isEmpty. Operand 1452 states and 2073 transitions. [2022-03-19 02:25:36,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 457 [2022-03-19 02:25:36,859 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:25:36,859 INFO L500 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] [2022-03-19 02:25:36,877 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2022-03-19 02:25:37,060 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 [2022-03-19 02:25:37,060 INFO L403 AbstractCegarLoop]: === Iteration 65 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:25:37,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:25:37,060 INFO L85 PathProgramCache]: Analyzing trace with hash -898460897, now seen corresponding path program 121 times [2022-03-19 02:25:37,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:25:37,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1050796070] [2022-03-19 02:25:37,061 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:25:37,062 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:25:37,062 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:25:37,062 INFO L85 PathProgramCache]: Analyzing trace with hash -898460897, now seen corresponding path program 122 times [2022-03-19 02:25:37,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:25:37,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007385371] [2022-03-19 02:25:37,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:25:37,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:25:37,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:25:38,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:25:38,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:25:38,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 441 [2022-03-19 02:25:38,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:25:38,494 INFO L134 CoverageAnalysis]: Checked inductivity of 13423 backedges. 0 proven. 3844 refuted. 0 times theorem prover too weak. 9579 trivial. 0 not checked. [2022-03-19 02:25:38,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:25:38,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007385371] [2022-03-19 02:25:38,495 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007385371] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:25:38,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977457951] [2022-03-19 02:25:38,495 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 02:25:38,495 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:25:38,495 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:25:38,497 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) [2022-03-19 02:25:38,497 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-03-19 02:25:39,060 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 02:25:39,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:25:39,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 1722 conjuncts, 64 conjunts are in the unsatisfiable core [2022-03-19 02:25:39,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:25:39,584 INFO L134 CoverageAnalysis]: Checked inductivity of 13423 backedges. 0 proven. 3844 refuted. 0 times theorem prover too weak. 9579 trivial. 0 not checked. [2022-03-19 02:25:39,584 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:25:43,678 INFO L134 CoverageAnalysis]: Checked inductivity of 13423 backedges. 0 proven. 3844 refuted. 0 times theorem prover too weak. 9579 trivial. 0 not checked. [2022-03-19 02:25:43,678 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1977457951] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:25:43,678 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:25:43,679 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 65, 65] total 131 [2022-03-19 02:25:43,679 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:25:43,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1050796070] [2022-03-19 02:25:43,679 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1050796070] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:25:43,679 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:25:43,679 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [67] imperfect sequences [] total 67 [2022-03-19 02:25:43,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038529412] [2022-03-19 02:25:43,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:25:43,679 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-03-19 02:25:43,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:25:43,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-03-19 02:25:43,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8260, Invalid=8770, Unknown=0, NotChecked=0, Total=17030 [2022-03-19 02:25:43,683 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) [2022-03-19 02:25:50,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:25:50,374 INFO L93 Difference]: Finished difference Result 2828 states and 4158 transitions. [2022-03-19 02:25:50,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-03-19 02:25:50,375 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 [2022-03-19 02:25:50,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:25:50,377 INFO L225 Difference]: With dead ends: 2828 [2022-03-19 02:25:50,377 INFO L226 Difference]: Without dead ends: 1507 [2022-03-19 02:25:50,381 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 1046 GetRequests, 852 SyntacticMatches, 0 SemanticMatches, 194 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2575 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=16587, Invalid=21633, Unknown=0, NotChecked=0, Total=38220 [2022-03-19 02:25:50,381 INFO L912 BasicCegarLoop]: 43 mSDtfsCounter, 3864 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 3477 mSolverCounterSat, 1783 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s 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, 2.2s IncrementalHoareTripleChecker+Time [2022-03-19 02:25:50,381 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [3868 Valid, 51 Invalid, 5260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1783 Valid, 3477 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-03-19 02:25:50,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1507 states. [2022-03-19 02:25:51,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1507 to 1475. [2022-03-19 02:25:51,105 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) [2022-03-19 02:25:51,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1475 states to 1475 states and 2106 transitions. [2022-03-19 02:25:51,107 INFO L78 Accepts]: Start accepts. Automaton has 1475 states and 2106 transitions. Word has length 456 [2022-03-19 02:25:51,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:25:51,107 INFO L478 AbstractCegarLoop]: Abstraction has 1475 states and 2106 transitions. [2022-03-19 02:25:51,107 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) [2022-03-19 02:25:51,107 INFO L276 IsEmpty]: Start isEmpty. Operand 1475 states and 2106 transitions. [2022-03-19 02:25:51,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 464 [2022-03-19 02:25:51,110 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:25:51,110 INFO L500 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] [2022-03-19 02:25:51,131 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2022-03-19 02:25:51,311 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 [2022-03-19 02:25:51,311 INFO L403 AbstractCegarLoop]: === Iteration 66 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:25:51,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:25:51,311 INFO L85 PathProgramCache]: Analyzing trace with hash 415016269, now seen corresponding path program 123 times [2022-03-19 02:25:51,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:25:51,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1407924751] [2022-03-19 02:25:51,313 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:25:51,313 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:25:51,313 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:25:51,313 INFO L85 PathProgramCache]: Analyzing trace with hash 415016269, now seen corresponding path program 124 times [2022-03-19 02:25:51,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:25:51,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385233135] [2022-03-19 02:25:51,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:25:51,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:25:51,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:25:52,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:25:52,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:25:52,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 448 [2022-03-19 02:25:52,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:25:52,727 INFO L134 CoverageAnalysis]: Checked inductivity of 13860 backedges. 0 proven. 3969 refuted. 0 times theorem prover too weak. 9891 trivial. 0 not checked. [2022-03-19 02:25:52,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:25:52,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385233135] [2022-03-19 02:25:52,727 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385233135] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:25:52,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620292032] [2022-03-19 02:25:52,728 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 02:25:52,728 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:25:52,728 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:25:52,729 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) [2022-03-19 02:25:52,730 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-03-19 02:25:53,294 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 02:25:53,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:25:53,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 1748 conjuncts, 65 conjunts are in the unsatisfiable core [2022-03-19 02:25:53,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:25:53,824 INFO L134 CoverageAnalysis]: Checked inductivity of 13860 backedges. 0 proven. 3969 refuted. 0 times theorem prover too weak. 9891 trivial. 0 not checked. [2022-03-19 02:25:53,824 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:25:58,128 INFO L134 CoverageAnalysis]: Checked inductivity of 13860 backedges. 0 proven. 3969 refuted. 0 times theorem prover too weak. 9891 trivial. 0 not checked. [2022-03-19 02:25:58,128 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1620292032] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:25:58,128 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:25:58,129 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 66, 66] total 133 [2022-03-19 02:25:58,129 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:25:58,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1407924751] [2022-03-19 02:25:58,129 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1407924751] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:25:58,129 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:25:58,129 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [68] imperfect sequences [] total 68 [2022-03-19 02:25:58,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187267602] [2022-03-19 02:25:58,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:25:58,130 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-03-19 02:25:58,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:25:58,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-03-19 02:25:58,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8519, Invalid=9037, Unknown=0, NotChecked=0, Total=17556 [2022-03-19 02:25:58,132 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) [2022-03-19 02:26:05,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:26:05,049 INFO L93 Difference]: Finished difference Result 2872 states and 4223 transitions. [2022-03-19 02:26:05,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-03-19 02:26:05,049 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 [2022-03-19 02:26:05,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:26:05,052 INFO L225 Difference]: With dead ends: 2872 [2022-03-19 02:26:05,052 INFO L226 Difference]: Without dead ends: 1530 [2022-03-19 02:26:05,055 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 1062 GetRequests, 865 SyntacticMatches, 0 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2648 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=17106, Invalid=22296, Unknown=0, NotChecked=0, Total=39402 [2022-03-19 02:26:05,055 INFO L912 BasicCegarLoop]: 43 mSDtfsCounter, 3709 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 3690 mSolverCounterSat, 1724 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s 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, 2.3s IncrementalHoareTripleChecker+Time [2022-03-19 02:26:05,055 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [3713 Valid, 59 Invalid, 5414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1724 Valid, 3690 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-03-19 02:26:05,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1530 states. [2022-03-19 02:26:05,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1530 to 1498. [2022-03-19 02:26:05,721 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) [2022-03-19 02:26:05,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1498 states to 1498 states and 2139 transitions. [2022-03-19 02:26:05,723 INFO L78 Accepts]: Start accepts. Automaton has 1498 states and 2139 transitions. Word has length 463 [2022-03-19 02:26:05,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:26:05,723 INFO L478 AbstractCegarLoop]: Abstraction has 1498 states and 2139 transitions. [2022-03-19 02:26:05,724 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) [2022-03-19 02:26:05,724 INFO L276 IsEmpty]: Start isEmpty. Operand 1498 states and 2139 transitions. [2022-03-19 02:26:05,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 471 [2022-03-19 02:26:05,727 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:26:05,727 INFO L500 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] [2022-03-19 02:26:05,747 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2022-03-19 02:26:05,927 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 [2022-03-19 02:26:05,928 INFO L403 AbstractCegarLoop]: === Iteration 67 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:26:05,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:26:05,928 INFO L85 PathProgramCache]: Analyzing trace with hash -108373533, now seen corresponding path program 125 times [2022-03-19 02:26:05,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:26:05,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [200758136] [2022-03-19 02:26:05,929 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:26:05,929 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:26:05,929 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:26:05,929 INFO L85 PathProgramCache]: Analyzing trace with hash -108373533, now seen corresponding path program 126 times [2022-03-19 02:26:05,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:26:05,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116541028] [2022-03-19 02:26:05,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:26:05,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:26:05,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:26:07,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:26:07,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:26:07,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 455 [2022-03-19 02:26:07,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:26:07,357 INFO L134 CoverageAnalysis]: Checked inductivity of 14304 backedges. 0 proven. 4096 refuted. 0 times theorem prover too weak. 10208 trivial. 0 not checked. [2022-03-19 02:26:07,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:26:07,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116541028] [2022-03-19 02:26:07,358 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116541028] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:26:07,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060726031] [2022-03-19 02:26:07,358 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 02:26:07,358 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:26:07,358 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:26:07,360 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) [2022-03-19 02:26:07,366 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-03-19 02:26:07,812 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-19 02:26:07,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:26:07,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-19 02:26:07,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:26:08,421 INFO L134 CoverageAnalysis]: Checked inductivity of 14304 backedges. 253 proven. 1 refuted. 0 times theorem prover too weak. 14050 trivial. 0 not checked. [2022-03-19 02:26:08,421 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:26:08,979 INFO L134 CoverageAnalysis]: Checked inductivity of 14304 backedges. 253 proven. 1 refuted. 0 times theorem prover too weak. 14050 trivial. 0 not checked. [2022-03-19 02:26:08,979 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1060726031] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:26:08,979 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:26:08,979 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 7, 7] total 77 [2022-03-19 02:26:08,979 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:26:08,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [200758136] [2022-03-19 02:26:08,979 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [200758136] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:26:08,980 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:26:08,980 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [69] imperfect sequences [] total 69 [2022-03-19 02:26:08,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784659732] [2022-03-19 02:26:08,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:26:08,980 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-03-19 02:26:08,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:26:08,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-03-19 02:26:08,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2240, Invalid=3612, Unknown=0, NotChecked=0, Total=5852 [2022-03-19 02:26:08,982 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) [2022-03-19 02:26:15,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:26:15,019 INFO L93 Difference]: Finished difference Result 2916 states and 4288 transitions. [2022-03-19 02:26:15,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-03-19 02:26:15,019 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 [2022-03-19 02:26:15,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:26:15,022 INFO L225 Difference]: With dead ends: 2916 [2022-03-19 02:26:15,022 INFO L226 Difference]: Without dead ends: 1553 [2022-03-19 02:26:15,025 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 1078 GetRequests, 935 SyntacticMatches, 1 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2988 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=6799, Invalid=13793, Unknown=0, NotChecked=0, Total=20592 [2022-03-19 02:26:15,025 INFO L912 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, 2.3s IncrementalHoareTripleChecker+Time [2022-03-19 02:26:15,025 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [4032 Valid, 51 Invalid, 5534 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1842 Valid, 3692 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-03-19 02:26:15,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1553 states. [2022-03-19 02:26:15,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1553 to 1521. [2022-03-19 02:26:15,704 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) [2022-03-19 02:26:15,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1521 states to 1521 states and 2172 transitions. [2022-03-19 02:26:15,706 INFO L78 Accepts]: Start accepts. Automaton has 1521 states and 2172 transitions. Word has length 470 [2022-03-19 02:26:15,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:26:15,706 INFO L478 AbstractCegarLoop]: Abstraction has 1521 states and 2172 transitions. [2022-03-19 02:26:15,706 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) [2022-03-19 02:26:15,707 INFO L276 IsEmpty]: Start isEmpty. Operand 1521 states and 2172 transitions. [2022-03-19 02:26:15,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 478 [2022-03-19 02:26:15,711 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:26:15,711 INFO L500 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] [2022-03-19 02:26:15,730 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2022-03-19 02:26:15,916 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 [2022-03-19 02:26:15,916 INFO L403 AbstractCegarLoop]: === Iteration 68 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:26:15,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:26:15,916 INFO L85 PathProgramCache]: Analyzing trace with hash -1209406327, now seen corresponding path program 127 times [2022-03-19 02:26:15,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:26:15,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [850762079] [2022-03-19 02:26:15,917 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:26:15,917 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:26:15,917 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:26:15,918 INFO L85 PathProgramCache]: Analyzing trace with hash -1209406327, now seen corresponding path program 128 times [2022-03-19 02:26:15,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:26:15,918 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014174809] [2022-03-19 02:26:15,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:26:15,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:26:15,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:26:17,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:26:17,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:26:17,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 462 [2022-03-19 02:26:17,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:26:17,399 INFO L134 CoverageAnalysis]: Checked inductivity of 14755 backedges. 0 proven. 4225 refuted. 0 times theorem prover too weak. 10530 trivial. 0 not checked. [2022-03-19 02:26:17,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:26:17,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014174809] [2022-03-19 02:26:17,399 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014174809] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:26:17,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240246982] [2022-03-19 02:26:17,399 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 02:26:17,399 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:26:17,400 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:26:17,401 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) [2022-03-19 02:26:17,401 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-03-19 02:26:18,011 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 02:26:18,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:26:18,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 1800 conjuncts, 67 conjunts are in the unsatisfiable core [2022-03-19 02:26:18,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:26:18,548 INFO L134 CoverageAnalysis]: Checked inductivity of 14755 backedges. 0 proven. 4225 refuted. 0 times theorem prover too weak. 10530 trivial. 0 not checked. [2022-03-19 02:26:18,548 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:26:23,033 INFO L134 CoverageAnalysis]: Checked inductivity of 14755 backedges. 0 proven. 4225 refuted. 0 times theorem prover too weak. 10530 trivial. 0 not checked. [2022-03-19 02:26:23,033 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [240246982] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:26:23,033 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:26:23,033 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 68, 68] total 137 [2022-03-19 02:26:23,033 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:26:23,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [850762079] [2022-03-19 02:26:23,033 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [850762079] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:26:23,033 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:26:23,034 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [70] imperfect sequences [] total 70 [2022-03-19 02:26:23,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155579436] [2022-03-19 02:26:23,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:26:23,034 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-03-19 02:26:23,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:26:23,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-03-19 02:26:23,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9049, Invalid=9583, Unknown=0, NotChecked=0, Total=18632 [2022-03-19 02:26:23,036 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) [2022-03-19 02:26:30,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:26:30,417 INFO L93 Difference]: Finished difference Result 2960 states and 4353 transitions. [2022-03-19 02:26:30,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-03-19 02:26:30,417 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 [2022-03-19 02:26:30,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:26:30,420 INFO L225 Difference]: With dead ends: 2960 [2022-03-19 02:26:30,420 INFO L226 Difference]: Without dead ends: 1576 [2022-03-19 02:26:30,423 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 1094 GetRequests, 891 SyntacticMatches, 0 SemanticMatches, 203 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2797 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=18168, Invalid=23652, Unknown=0, NotChecked=0, Total=41820 [2022-03-19 02:26:30,424 INFO L912 BasicCegarLoop]: 43 mSDtfsCounter, 4666 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 3525 mSolverCounterSat, 2277 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s 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, 2.4s IncrementalHoareTripleChecker+Time [2022-03-19 02:26:30,424 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [4670 Valid, 47 Invalid, 5802 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2277 Valid, 3525 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-03-19 02:26:30,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1576 states. [2022-03-19 02:26:31,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1576 to 1544. [2022-03-19 02:26:31,183 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) [2022-03-19 02:26:31,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1544 states to 1544 states and 2205 transitions. [2022-03-19 02:26:31,186 INFO L78 Accepts]: Start accepts. Automaton has 1544 states and 2205 transitions. Word has length 477 [2022-03-19 02:26:31,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:26:31,186 INFO L478 AbstractCegarLoop]: Abstraction has 1544 states and 2205 transitions. [2022-03-19 02:26:31,186 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) [2022-03-19 02:26:31,186 INFO L276 IsEmpty]: Start isEmpty. Operand 1544 states and 2205 transitions. [2022-03-19 02:26:31,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 485 [2022-03-19 02:26:31,190 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:26:31,190 INFO L500 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] [2022-03-19 02:26:31,210 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2022-03-19 02:26:31,390 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 [2022-03-19 02:26:31,390 INFO L403 AbstractCegarLoop]: === Iteration 69 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:26:31,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:26:31,391 INFO L85 PathProgramCache]: Analyzing trace with hash 1433392295, now seen corresponding path program 129 times [2022-03-19 02:26:31,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:26:31,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [322461821] [2022-03-19 02:26:31,392 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:26:31,392 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:26:31,392 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:26:31,392 INFO L85 PathProgramCache]: Analyzing trace with hash 1433392295, now seen corresponding path program 130 times [2022-03-19 02:26:31,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:26:31,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837329940] [2022-03-19 02:26:31,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:26:31,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:26:31,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:26:32,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:26:32,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:26:32,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 469 [2022-03-19 02:26:32,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:26:32,956 INFO L134 CoverageAnalysis]: Checked inductivity of 15213 backedges. 0 proven. 4356 refuted. 0 times theorem prover too weak. 10857 trivial. 0 not checked. [2022-03-19 02:26:32,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:26:32,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837329940] [2022-03-19 02:26:32,957 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837329940] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:26:32,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451811408] [2022-03-19 02:26:32,957 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 02:26:32,957 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:26:32,957 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:26:32,958 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) [2022-03-19 02:26:32,960 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-03-19 02:26:33,578 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 02:26:33,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:26:33,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 1826 conjuncts, 68 conjunts are in the unsatisfiable core [2022-03-19 02:26:33,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:26:34,144 INFO L134 CoverageAnalysis]: Checked inductivity of 15213 backedges. 0 proven. 4356 refuted. 0 times theorem prover too weak. 10857 trivial. 0 not checked. [2022-03-19 02:26:34,144 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:26:38,843 INFO L134 CoverageAnalysis]: Checked inductivity of 15213 backedges. 0 proven. 4356 refuted. 0 times theorem prover too weak. 10857 trivial. 0 not checked. [2022-03-19 02:26:38,843 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [451811408] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:26:38,843 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:26:38,844 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 69, 69] total 139 [2022-03-19 02:26:38,844 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:26:38,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [322461821] [2022-03-19 02:26:38,844 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [322461821] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:26:38,844 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:26:38,844 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [71] imperfect sequences [] total 71 [2022-03-19 02:26:38,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984978723] [2022-03-19 02:26:38,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:26:38,844 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-03-19 02:26:38,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:26:38,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-03-19 02:26:38,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9320, Invalid=9862, Unknown=0, NotChecked=0, Total=19182 [2022-03-19 02:26:38,847 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) [2022-03-19 02:26:46,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:26:46,459 INFO L93 Difference]: Finished difference Result 3004 states and 4418 transitions. [2022-03-19 02:26:46,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-03-19 02:26:46,460 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 [2022-03-19 02:26:46,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:26:46,462 INFO L225 Difference]: With dead ends: 3004 [2022-03-19 02:26:46,462 INFO L226 Difference]: Without dead ends: 1599 [2022-03-19 02:26:46,465 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 1110 GetRequests, 904 SyntacticMatches, 0 SemanticMatches, 206 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2873 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=18711, Invalid=24345, Unknown=0, NotChecked=0, Total=43056 [2022-03-19 02:26:46,466 INFO L912 BasicCegarLoop]: 43 mSDtfsCounter, 3971 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 3822 mSolverCounterSat, 1852 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s 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, 2.3s IncrementalHoareTripleChecker+Time [2022-03-19 02:26:46,466 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [3975 Valid, 51 Invalid, 5674 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1852 Valid, 3822 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-03-19 02:26:46,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1599 states. [2022-03-19 02:26:47,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1599 to 1567. [2022-03-19 02:26:47,171 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) [2022-03-19 02:26:47,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1567 states to 1567 states and 2238 transitions. [2022-03-19 02:26:47,173 INFO L78 Accepts]: Start accepts. Automaton has 1567 states and 2238 transitions. Word has length 484 [2022-03-19 02:26:47,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:26:47,174 INFO L478 AbstractCegarLoop]: Abstraction has 1567 states and 2238 transitions. [2022-03-19 02:26:47,174 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) [2022-03-19 02:26:47,174 INFO L276 IsEmpty]: Start isEmpty. Operand 1567 states and 2238 transitions. [2022-03-19 02:26:47,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 492 [2022-03-19 02:26:47,177 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:26:47,177 INFO L500 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] [2022-03-19 02:26:47,198 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Ended with exit code 0 [2022-03-19 02:26:47,378 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 [2022-03-19 02:26:47,378 INFO L403 AbstractCegarLoop]: === Iteration 70 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:26:47,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:26:47,378 INFO L85 PathProgramCache]: Analyzing trace with hash 1072291781, now seen corresponding path program 131 times [2022-03-19 02:26:47,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:26:47,378 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1044905651] [2022-03-19 02:26:47,380 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:26:47,380 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:26:47,380 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:26:47,380 INFO L85 PathProgramCache]: Analyzing trace with hash 1072291781, now seen corresponding path program 132 times [2022-03-19 02:26:47,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:26:47,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794222014] [2022-03-19 02:26:47,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:26:47,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:26:47,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:26:48,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:26:48,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:26:49,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 476 [2022-03-19 02:26:49,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:26:49,021 INFO L134 CoverageAnalysis]: Checked inductivity of 15678 backedges. 0 proven. 4489 refuted. 0 times theorem prover too weak. 11189 trivial. 0 not checked. [2022-03-19 02:26:49,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:26:49,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794222014] [2022-03-19 02:26:49,021 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794222014] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:26:49,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152750475] [2022-03-19 02:26:49,022 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 02:26:49,022 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:26:49,022 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:26:49,023 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) [2022-03-19 02:26:49,023 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-03-19 02:26:49,507 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-19 02:26:49,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:26:49,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-19 02:26:49,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:26:50,132 INFO L134 CoverageAnalysis]: Checked inductivity of 15678 backedges. 265 proven. 1 refuted. 0 times theorem prover too weak. 15412 trivial. 0 not checked. [2022-03-19 02:26:50,132 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:26:50,696 INFO L134 CoverageAnalysis]: Checked inductivity of 15678 backedges. 265 proven. 1 refuted. 0 times theorem prover too weak. 15412 trivial. 0 not checked. [2022-03-19 02:26:50,696 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1152750475] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:26:50,696 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:26:50,697 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 7, 7] total 80 [2022-03-19 02:26:50,697 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:26:50,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1044905651] [2022-03-19 02:26:50,697 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1044905651] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:26:50,697 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:26:50,697 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [72] imperfect sequences [] total 72 [2022-03-19 02:26:50,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359800947] [2022-03-19 02:26:50,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:26:50,697 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-03-19 02:26:50,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:26:50,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-03-19 02:26:50,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2444, Invalid=3876, Unknown=0, NotChecked=0, Total=6320 [2022-03-19 02:26:50,699 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) [2022-03-19 02:26:57,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:26:57,473 INFO L93 Difference]: Finished difference Result 3048 states and 4483 transitions. [2022-03-19 02:26:57,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-03-19 02:26:57,473 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 [2022-03-19 02:26:57,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:26:57,476 INFO L225 Difference]: With dead ends: 3048 [2022-03-19 02:26:57,476 INFO L226 Difference]: Without dead ends: 1622 [2022-03-19 02:26:57,479 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 1126 GetRequests, 977 SyntacticMatches, 1 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3228 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=7417, Invalid=14933, Unknown=0, NotChecked=0, Total=22350 [2022-03-19 02:26:57,479 INFO L912 BasicCegarLoop]: 43 mSDtfsCounter, 3651 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 4275 mSolverCounterSat, 1718 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s 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, 2.4s IncrementalHoareTripleChecker+Time [2022-03-19 02:26:57,479 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [3655 Valid, 53 Invalid, 5993 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1718 Valid, 4275 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-03-19 02:26:57,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1622 states. [2022-03-19 02:26:58,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1622 to 1590. [2022-03-19 02:26:58,232 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) [2022-03-19 02:26:58,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1590 states to 1590 states and 2271 transitions. [2022-03-19 02:26:58,234 INFO L78 Accepts]: Start accepts. Automaton has 1590 states and 2271 transitions. Word has length 491 [2022-03-19 02:26:58,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:26:58,234 INFO L478 AbstractCegarLoop]: Abstraction has 1590 states and 2271 transitions. [2022-03-19 02:26:58,234 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) [2022-03-19 02:26:58,234 INFO L276 IsEmpty]: Start isEmpty. Operand 1590 states and 2271 transitions. [2022-03-19 02:26:58,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 499 [2022-03-19 02:26:58,238 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:26:58,238 INFO L500 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] [2022-03-19 02:26:58,258 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2022-03-19 02:26:58,438 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 [2022-03-19 02:26:58,439 INFO L403 AbstractCegarLoop]: === Iteration 71 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:26:58,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:26:58,439 INFO L85 PathProgramCache]: Analyzing trace with hash -1400749205, now seen corresponding path program 133 times [2022-03-19 02:26:58,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:26:58,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2060580384] [2022-03-19 02:26:58,440 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:26:58,440 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:26:58,440 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:26:58,440 INFO L85 PathProgramCache]: Analyzing trace with hash -1400749205, now seen corresponding path program 134 times [2022-03-19 02:26:58,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:26:58,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735487970] [2022-03-19 02:26:58,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:26:58,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:26:58,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:27:00,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:27:00,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:27:00,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 483 [2022-03-19 02:27:00,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:27:00,063 INFO L134 CoverageAnalysis]: Checked inductivity of 16150 backedges. 0 proven. 4624 refuted. 0 times theorem prover too weak. 11526 trivial. 0 not checked. [2022-03-19 02:27:00,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:27:00,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735487970] [2022-03-19 02:27:00,063 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735487970] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:27:00,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [406122191] [2022-03-19 02:27:00,064 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 02:27:00,064 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:27:00,064 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:27:00,065 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) [2022-03-19 02:27:00,065 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-03-19 02:27:00,684 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 02:27:00,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:27:00,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 1878 conjuncts, 70 conjunts are in the unsatisfiable core [2022-03-19 02:27:00,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:27:01,244 INFO L134 CoverageAnalysis]: Checked inductivity of 16150 backedges. 0 proven. 4624 refuted. 0 times theorem prover too weak. 11526 trivial. 0 not checked. [2022-03-19 02:27:01,244 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:27:06,041 INFO L134 CoverageAnalysis]: Checked inductivity of 16150 backedges. 0 proven. 4624 refuted. 0 times theorem prover too weak. 11526 trivial. 0 not checked. [2022-03-19 02:27:06,042 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [406122191] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:27:06,042 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:27:06,042 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 71, 71] total 143 [2022-03-19 02:27:06,042 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:27:06,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2060580384] [2022-03-19 02:27:06,042 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2060580384] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:27:06,042 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:27:06,043 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [73] imperfect sequences [] total 73 [2022-03-19 02:27:06,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568618236] [2022-03-19 02:27:06,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:27:06,043 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-03-19 02:27:06,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:27:06,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-03-19 02:27:06,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9874, Invalid=10432, Unknown=0, NotChecked=0, Total=20306 [2022-03-19 02:27:06,047 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) [2022-03-19 02:27:14,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:27:14,001 INFO L93 Difference]: Finished difference Result 3092 states and 4548 transitions. [2022-03-19 02:27:14,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-03-19 02:27:14,002 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 [2022-03-19 02:27:14,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:27:14,004 INFO L225 Difference]: With dead ends: 3092 [2022-03-19 02:27:14,005 INFO L226 Difference]: Without dead ends: 1645 [2022-03-19 02:27:14,008 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 1142 GetRequests, 930 SyntacticMatches, 0 SemanticMatches, 212 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3028 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=19821, Invalid=25761, Unknown=0, NotChecked=0, Total=45582 [2022-03-19 02:27:14,008 INFO L912 BasicCegarLoop]: 43 mSDtfsCounter, 4180 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 3939 mSolverCounterSat, 1989 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s 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, 2.5s IncrementalHoareTripleChecker+Time [2022-03-19 02:27:14,008 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [4184 Valid, 49 Invalid, 5928 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1989 Valid, 3939 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-03-19 02:27:14,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1645 states. [2022-03-19 02:27:14,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1645 to 1613. [2022-03-19 02:27:14,774 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) [2022-03-19 02:27:14,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1613 states to 1613 states and 2304 transitions. [2022-03-19 02:27:14,777 INFO L78 Accepts]: Start accepts. Automaton has 1613 states and 2304 transitions. Word has length 498 [2022-03-19 02:27:14,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:27:14,777 INFO L478 AbstractCegarLoop]: Abstraction has 1613 states and 2304 transitions. [2022-03-19 02:27:14,777 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) [2022-03-19 02:27:14,777 INFO L276 IsEmpty]: Start isEmpty. Operand 1613 states and 2304 transitions. [2022-03-19 02:27:14,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 506 [2022-03-19 02:27:14,782 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:27:14,782 INFO L500 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] [2022-03-19 02:27:14,804 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Ended with exit code 0 [2022-03-19 02:27:14,982 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 [2022-03-19 02:27:14,982 INFO L403 AbstractCegarLoop]: === Iteration 72 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:27:14,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:27:14,983 INFO L85 PathProgramCache]: Analyzing trace with hash -90358015, now seen corresponding path program 135 times [2022-03-19 02:27:14,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:27:14,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1229158630] [2022-03-19 02:27:14,984 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:27:14,984 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:27:14,984 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:27:14,984 INFO L85 PathProgramCache]: Analyzing trace with hash -90358015, now seen corresponding path program 136 times [2022-03-19 02:27:14,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:27:14,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818436053] [2022-03-19 02:27:14,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:27:14,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:27:15,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:27:16,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:27:16,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:27:16,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 490 [2022-03-19 02:27:16,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:27:16,724 INFO L134 CoverageAnalysis]: Checked inductivity of 16629 backedges. 0 proven. 4761 refuted. 0 times theorem prover too weak. 11868 trivial. 0 not checked. [2022-03-19 02:27:16,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:27:16,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818436053] [2022-03-19 02:27:16,724 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818436053] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:27:16,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700293903] [2022-03-19 02:27:16,724 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 02:27:16,725 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:27:16,725 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:27:16,726 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) [2022-03-19 02:27:16,728 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-03-19 02:27:17,399 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 02:27:17,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:27:17,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 1904 conjuncts, 71 conjunts are in the unsatisfiable core [2022-03-19 02:27:17,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:27:17,998 INFO L134 CoverageAnalysis]: Checked inductivity of 16629 backedges. 0 proven. 4761 refuted. 0 times theorem prover too weak. 11868 trivial. 0 not checked. [2022-03-19 02:27:17,998 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:27:22,992 INFO L134 CoverageAnalysis]: Checked inductivity of 16629 backedges. 0 proven. 4761 refuted. 0 times theorem prover too weak. 11868 trivial. 0 not checked. [2022-03-19 02:27:22,993 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1700293903] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:27:22,993 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:27:22,993 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 72, 72] total 145 [2022-03-19 02:27:22,993 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:27:22,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1229158630] [2022-03-19 02:27:22,993 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1229158630] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:27:22,993 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:27:22,993 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [74] imperfect sequences [] total 74 [2022-03-19 02:27:22,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868107892] [2022-03-19 02:27:22,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:27:22,994 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-03-19 02:27:22,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:27:22,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-03-19 02:27:22,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10157, Invalid=10723, Unknown=0, NotChecked=0, Total=20880 [2022-03-19 02:27:22,998 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) [2022-03-19 02:27:31,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:27:31,131 INFO L93 Difference]: Finished difference Result 3136 states and 4613 transitions. [2022-03-19 02:27:31,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-03-19 02:27:31,132 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 [2022-03-19 02:27:31,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:27:31,135 INFO L225 Difference]: With dead ends: 3136 [2022-03-19 02:27:31,135 INFO L226 Difference]: Without dead ends: 1668 [2022-03-19 02:27:31,140 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 1158 GetRequests, 943 SyntacticMatches, 0 SemanticMatches, 215 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3107 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=20388, Invalid=26484, Unknown=0, NotChecked=0, Total=46872 [2022-03-19 02:27:31,140 INFO L912 BasicCegarLoop]: 43 mSDtfsCounter, 4051 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 3919 mSolverCounterSat, 1772 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s 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, 2.4s IncrementalHoareTripleChecker+Time [2022-03-19 02:27:31,140 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [4055 Valid, 59 Invalid, 5691 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1772 Valid, 3919 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-03-19 02:27:31,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1668 states. [2022-03-19 02:27:31,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1668 to 1636. [2022-03-19 02:27:31,932 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) [2022-03-19 02:27:31,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1636 states to 1636 states and 2337 transitions. [2022-03-19 02:27:31,934 INFO L78 Accepts]: Start accepts. Automaton has 1636 states and 2337 transitions. Word has length 505 [2022-03-19 02:27:31,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:27:31,934 INFO L478 AbstractCegarLoop]: Abstraction has 1636 states and 2337 transitions. [2022-03-19 02:27:31,934 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) [2022-03-19 02:27:31,934 INFO L276 IsEmpty]: Start isEmpty. Operand 1636 states and 2337 transitions. [2022-03-19 02:27:31,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 513 [2022-03-19 02:27:31,938 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:27:31,938 INFO L500 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] [2022-03-19 02:27:31,960 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Ended with exit code 0 [2022-03-19 02:27:32,138 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 [2022-03-19 02:27:32,139 INFO L403 AbstractCegarLoop]: === Iteration 73 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:27:32,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:27:32,139 INFO L85 PathProgramCache]: Analyzing trace with hash 1168172591, now seen corresponding path program 137 times [2022-03-19 02:27:32,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:27:32,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [369007014] [2022-03-19 02:27:32,140 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:27:32,140 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:27:32,140 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:27:32,140 INFO L85 PathProgramCache]: Analyzing trace with hash 1168172591, now seen corresponding path program 138 times [2022-03-19 02:27:32,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:27:32,141 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222826557] [2022-03-19 02:27:32,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:27:32,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:27:32,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:27:33,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:27:33,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:27:33,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 497 [2022-03-19 02:27:33,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:27:33,827 INFO L134 CoverageAnalysis]: Checked inductivity of 17115 backedges. 0 proven. 4900 refuted. 0 times theorem prover too weak. 12215 trivial. 0 not checked. [2022-03-19 02:27:33,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:27:33,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222826557] [2022-03-19 02:27:33,828 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222826557] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:27:33,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024449311] [2022-03-19 02:27:33,828 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 02:27:33,828 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:27:33,828 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:27:33,836 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) [2022-03-19 02:27:33,838 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-03-19 02:27:34,366 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-19 02:27:34,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:27:34,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-19 02:27:34,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:27:35,024 INFO L134 CoverageAnalysis]: Checked inductivity of 17115 backedges. 277 proven. 1 refuted. 0 times theorem prover too weak. 16837 trivial. 0 not checked. [2022-03-19 02:27:35,024 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:27:35,643 INFO L134 CoverageAnalysis]: Checked inductivity of 17115 backedges. 277 proven. 1 refuted. 0 times theorem prover too weak. 16837 trivial. 0 not checked. [2022-03-19 02:27:35,643 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1024449311] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:27:35,643 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:27:35,643 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 7, 7] total 83 [2022-03-19 02:27:35,644 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:27:35,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [369007014] [2022-03-19 02:27:35,644 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [369007014] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:27:35,644 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:27:35,644 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [75] imperfect sequences [] total 75 [2022-03-19 02:27:35,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78227379] [2022-03-19 02:27:35,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:27:35,644 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-03-19 02:27:35,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:27:35,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-03-19 02:27:35,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2657, Invalid=4149, Unknown=0, NotChecked=0, Total=6806 [2022-03-19 02:27:35,645 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) [2022-03-19 02:27:42,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:27:42,724 INFO L93 Difference]: Finished difference Result 3180 states and 4678 transitions. [2022-03-19 02:27:42,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-03-19 02:27:42,724 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 [2022-03-19 02:27:42,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:27:42,728 INFO L225 Difference]: With dead ends: 3180 [2022-03-19 02:27:42,728 INFO L226 Difference]: Without dead ends: 1691 [2022-03-19 02:27:42,731 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 1174 GetRequests, 1019 SyntacticMatches, 1 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3477 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=8062, Invalid=16118, Unknown=0, NotChecked=0, Total=24180 [2022-03-19 02:27:42,731 INFO L912 BasicCegarLoop]: 43 mSDtfsCounter, 3905 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 4255 mSolverCounterSat, 1820 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s 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, 2.5s IncrementalHoareTripleChecker+Time [2022-03-19 02:27:42,732 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [3909 Valid, 57 Invalid, 6075 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1820 Valid, 4255 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-03-19 02:27:42,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1691 states. [2022-03-19 02:27:43,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1691 to 1659. [2022-03-19 02:27:43,547 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) [2022-03-19 02:27:43,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1659 states to 1659 states and 2370 transitions. [2022-03-19 02:27:43,550 INFO L78 Accepts]: Start accepts. Automaton has 1659 states and 2370 transitions. Word has length 512 [2022-03-19 02:27:43,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:27:43,550 INFO L478 AbstractCegarLoop]: Abstraction has 1659 states and 2370 transitions. [2022-03-19 02:27:43,550 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) [2022-03-19 02:27:43,551 INFO L276 IsEmpty]: Start isEmpty. Operand 1659 states and 2370 transitions. [2022-03-19 02:27:43,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 520 [2022-03-19 02:27:43,554 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:27:43,554 INFO L500 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] [2022-03-19 02:27:43,574 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Ended with exit code 0 [2022-03-19 02:27:43,755 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 [2022-03-19 02:27:43,755 INFO L403 AbstractCegarLoop]: === Iteration 74 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:27:43,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:27:43,755 INFO L85 PathProgramCache]: Analyzing trace with hash -412825027, now seen corresponding path program 139 times [2022-03-19 02:27:43,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:27:43,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1157582637] [2022-03-19 02:27:43,757 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:27:43,757 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:27:43,757 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:27:43,757 INFO L85 PathProgramCache]: Analyzing trace with hash -412825027, now seen corresponding path program 140 times [2022-03-19 02:27:43,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:27:43,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397656324] [2022-03-19 02:27:43,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:27:43,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:27:43,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:27:45,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:27:45,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:27:45,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 504 [2022-03-19 02:27:45,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:27:45,566 INFO L134 CoverageAnalysis]: Checked inductivity of 17608 backedges. 0 proven. 5041 refuted. 0 times theorem prover too weak. 12567 trivial. 0 not checked. [2022-03-19 02:27:45,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:27:45,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397656324] [2022-03-19 02:27:45,566 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397656324] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:27:45,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268361655] [2022-03-19 02:27:45,566 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 02:27:45,566 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:27:45,567 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:27:45,568 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) [2022-03-19 02:27:45,568 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-03-19 02:27:46,247 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 02:27:46,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:27:46,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 1956 conjuncts, 73 conjunts are in the unsatisfiable core [2022-03-19 02:27:46,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:27:46,858 INFO L134 CoverageAnalysis]: Checked inductivity of 17608 backedges. 0 proven. 5041 refuted. 0 times theorem prover too weak. 12567 trivial. 0 not checked. [2022-03-19 02:27:46,858 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:27:52,201 INFO L134 CoverageAnalysis]: Checked inductivity of 17608 backedges. 0 proven. 5041 refuted. 0 times theorem prover too weak. 12567 trivial. 0 not checked. [2022-03-19 02:27:52,201 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1268361655] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:27:52,201 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:27:52,202 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 74, 74] total 149 [2022-03-19 02:27:52,202 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:27:52,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1157582637] [2022-03-19 02:27:52,202 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1157582637] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:27:52,202 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:27:52,202 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [76] imperfect sequences [] total 76 [2022-03-19 02:27:52,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000155803] [2022-03-19 02:27:52,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:27:52,203 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-03-19 02:27:52,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:27:52,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-03-19 02:27:52,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10735, Invalid=11317, Unknown=0, NotChecked=0, Total=22052 [2022-03-19 02:27:52,206 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) [2022-03-19 02:28:00,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:28:00,916 INFO L93 Difference]: Finished difference Result 3224 states and 4743 transitions. [2022-03-19 02:28:00,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-03-19 02:28:00,917 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 [2022-03-19 02:28:00,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:28:00,920 INFO L225 Difference]: With dead ends: 3224 [2022-03-19 02:28:00,920 INFO L226 Difference]: Without dead ends: 1714 [2022-03-19 02:28:00,923 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 1190 GetRequests, 969 SyntacticMatches, 0 SemanticMatches, 221 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3268 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=21546, Invalid=27960, Unknown=0, NotChecked=0, Total=49506 [2022-03-19 02:28:00,923 INFO L912 BasicCegarLoop]: 43 mSDtfsCounter, 4388 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 4092 mSolverCounterSat, 2078 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s 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, 2.6s IncrementalHoareTripleChecker+Time [2022-03-19 02:28:00,923 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [4392 Valid, 53 Invalid, 6170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2078 Valid, 4092 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-03-19 02:28:00,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1714 states. [2022-03-19 02:28:01,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1714 to 1682. [2022-03-19 02:28:01,759 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) [2022-03-19 02:28:01,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1682 states to 1682 states and 2403 transitions. [2022-03-19 02:28:01,761 INFO L78 Accepts]: Start accepts. Automaton has 1682 states and 2403 transitions. Word has length 519 [2022-03-19 02:28:01,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:28:01,761 INFO L478 AbstractCegarLoop]: Abstraction has 1682 states and 2403 transitions. [2022-03-19 02:28:01,761 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) [2022-03-19 02:28:01,761 INFO L276 IsEmpty]: Start isEmpty. Operand 1682 states and 2403 transitions. [2022-03-19 02:28:01,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 527 [2022-03-19 02:28:01,766 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:28:01,766 INFO L500 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] [2022-03-19 02:28:01,792 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Ended with exit code 0 [2022-03-19 02:28:01,981 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 [2022-03-19 02:28:01,981 INFO L403 AbstractCegarLoop]: === Iteration 75 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:28:01,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:28:01,982 INFO L85 PathProgramCache]: Analyzing trace with hash -2077557517, now seen corresponding path program 141 times [2022-03-19 02:28:01,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:28:01,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [314711548] [2022-03-19 02:28:01,983 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:28:01,983 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:28:01,983 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:28:01,983 INFO L85 PathProgramCache]: Analyzing trace with hash -2077557517, now seen corresponding path program 142 times [2022-03-19 02:28:01,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:28:01,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556616431] [2022-03-19 02:28:01,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:28:01,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:28:02,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:28:03,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:28:03,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:28:03,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 511 [2022-03-19 02:28:03,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:28:03,790 INFO L134 CoverageAnalysis]: Checked inductivity of 18108 backedges. 0 proven. 5184 refuted. 0 times theorem prover too weak. 12924 trivial. 0 not checked. [2022-03-19 02:28:03,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:28:03,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556616431] [2022-03-19 02:28:03,790 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556616431] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:28:03,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907195143] [2022-03-19 02:28:03,790 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 02:28:03,791 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:28:03,791 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:28:03,792 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) [2022-03-19 02:28:03,792 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-03-19 02:28:04,485 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 02:28:04,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:28:04,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 1982 conjuncts, 74 conjunts are in the unsatisfiable core [2022-03-19 02:28:04,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:28:05,082 INFO L134 CoverageAnalysis]: Checked inductivity of 18108 backedges. 0 proven. 5184 refuted. 0 times theorem prover too weak. 12924 trivial. 0 not checked. [2022-03-19 02:28:05,082 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:28:10,504 INFO L134 CoverageAnalysis]: Checked inductivity of 18108 backedges. 0 proven. 5184 refuted. 0 times theorem prover too weak. 12924 trivial. 0 not checked. [2022-03-19 02:28:10,504 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [907195143] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:28:10,504 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:28:10,504 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 75, 75] total 151 [2022-03-19 02:28:10,504 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:28:10,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [314711548] [2022-03-19 02:28:10,504 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [314711548] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:28:10,504 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:28:10,504 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [77] imperfect sequences [] total 77 [2022-03-19 02:28:10,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541870225] [2022-03-19 02:28:10,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:28:10,505 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-03-19 02:28:10,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:28:10,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-03-19 02:28:10,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11030, Invalid=11620, Unknown=0, NotChecked=0, Total=22650 [2022-03-19 02:28:10,508 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) [2022-03-19 02:28:19,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:28:19,365 INFO L93 Difference]: Finished difference Result 3268 states and 4808 transitions. [2022-03-19 02:28:19,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-03-19 02:28:19,365 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 [2022-03-19 02:28:19,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:28:19,368 INFO L225 Difference]: With dead ends: 3268 [2022-03-19 02:28:19,368 INFO L226 Difference]: Without dead ends: 1737 [2022-03-19 02:28:19,371 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 1206 GetRequests, 982 SyntacticMatches, 0 SemanticMatches, 224 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3350 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=22137, Invalid=28713, Unknown=0, NotChecked=0, Total=50850 [2022-03-19 02:28:19,372 INFO L912 BasicCegarLoop]: 43 mSDtfsCounter, 4395 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 4066 mSolverCounterSat, 2012 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s 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, 2.6s IncrementalHoareTripleChecker+Time [2022-03-19 02:28:19,372 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [4399 Valid, 53 Invalid, 6078 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2012 Valid, 4066 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-03-19 02:28:19,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1737 states. [2022-03-19 02:28:20,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1737 to 1705. [2022-03-19 02:28:20,215 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) [2022-03-19 02:28:20,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1705 states to 1705 states and 2436 transitions. [2022-03-19 02:28:20,218 INFO L78 Accepts]: Start accepts. Automaton has 1705 states and 2436 transitions. Word has length 526 [2022-03-19 02:28:20,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:28:20,218 INFO L478 AbstractCegarLoop]: Abstraction has 1705 states and 2436 transitions. [2022-03-19 02:28:20,218 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) [2022-03-19 02:28:20,218 INFO L276 IsEmpty]: Start isEmpty. Operand 1705 states and 2436 transitions. [2022-03-19 02:28:20,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 534 [2022-03-19 02:28:20,222 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:28:20,222 INFO L500 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] [2022-03-19 02:28:20,243 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Ended with exit code 0 [2022-03-19 02:28:20,422 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 [2022-03-19 02:28:20,422 INFO L403 AbstractCegarLoop]: === Iteration 76 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:28:20,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:28:20,423 INFO L85 PathProgramCache]: Analyzing trace with hash 388055417, now seen corresponding path program 143 times [2022-03-19 02:28:20,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:28:20,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1308073937] [2022-03-19 02:28:20,424 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:28:20,424 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:28:20,424 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:28:20,424 INFO L85 PathProgramCache]: Analyzing trace with hash 388055417, now seen corresponding path program 144 times [2022-03-19 02:28:20,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:28:20,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178353840] [2022-03-19 02:28:20,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:28:20,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:28:20,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:28:22,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:28:22,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:28:22,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 518 [2022-03-19 02:28:22,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:28:22,277 INFO L134 CoverageAnalysis]: Checked inductivity of 18615 backedges. 0 proven. 5329 refuted. 0 times theorem prover too weak. 13286 trivial. 0 not checked. [2022-03-19 02:28:22,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:28:22,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178353840] [2022-03-19 02:28:22,277 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178353840] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:28:22,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304660956] [2022-03-19 02:28:22,277 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 02:28:22,277 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:28:22,278 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:28:22,279 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) [2022-03-19 02:28:22,279 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-03-19 02:28:22,846 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-19 02:28:22,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:28:22,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-19 02:28:22,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:28:23,539 INFO L134 CoverageAnalysis]: Checked inductivity of 18615 backedges. 289 proven. 1 refuted. 0 times theorem prover too weak. 18325 trivial. 0 not checked. [2022-03-19 02:28:23,539 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:28:24,151 INFO L134 CoverageAnalysis]: Checked inductivity of 18615 backedges. 289 proven. 1 refuted. 0 times theorem prover too weak. 18325 trivial. 0 not checked. [2022-03-19 02:28:24,151 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [304660956] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:28:24,151 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:28:24,151 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 7, 7] total 86 [2022-03-19 02:28:24,152 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:28:24,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1308073937] [2022-03-19 02:28:24,152 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1308073937] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:28:24,152 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:28:24,152 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [78] imperfect sequences [] total 78 [2022-03-19 02:28:24,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560233587] [2022-03-19 02:28:24,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:28:24,152 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2022-03-19 02:28:24,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:28:24,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2022-03-19 02:28:24,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2879, Invalid=4431, Unknown=0, NotChecked=0, Total=7310 [2022-03-19 02:28:24,154 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) [2022-03-19 02:28:31,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:28:31,837 INFO L93 Difference]: Finished difference Result 3312 states and 4873 transitions. [2022-03-19 02:28:31,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-03-19 02:28:31,838 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 [2022-03-19 02:28:31,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:28:31,841 INFO L225 Difference]: With dead ends: 3312 [2022-03-19 02:28:31,841 INFO L226 Difference]: Without dead ends: 1760 [2022-03-19 02:28:31,843 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 1222 GetRequests, 1061 SyntacticMatches, 1 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3735 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=8734, Invalid=17348, Unknown=0, NotChecked=0, Total=26082 [2022-03-19 02:28:31,844 INFO L912 BasicCegarLoop]: 43 mSDtfsCounter, 4273 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 4462 mSolverCounterSat, 2044 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s 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, 2.7s IncrementalHoareTripleChecker+Time [2022-03-19 02:28:31,844 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [4277 Valid, 57 Invalid, 6506 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2044 Valid, 4462 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-03-19 02:28:31,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1760 states. [2022-03-19 02:28:32,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1760 to 1728. [2022-03-19 02:28:32,732 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) [2022-03-19 02:28:32,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1728 states to 1728 states and 2469 transitions. [2022-03-19 02:28:32,734 INFO L78 Accepts]: Start accepts. Automaton has 1728 states and 2469 transitions. Word has length 533 [2022-03-19 02:28:32,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:28:32,735 INFO L478 AbstractCegarLoop]: Abstraction has 1728 states and 2469 transitions. [2022-03-19 02:28:32,735 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) [2022-03-19 02:28:32,735 INFO L276 IsEmpty]: Start isEmpty. Operand 1728 states and 2469 transitions. [2022-03-19 02:28:32,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 541 [2022-03-19 02:28:32,739 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:28:32,739 INFO L500 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] [2022-03-19 02:28:32,758 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Ended with exit code 0 [2022-03-19 02:28:32,939 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 [2022-03-19 02:28:32,939 INFO L403 AbstractCegarLoop]: === Iteration 77 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:28:32,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:28:32,940 INFO L85 PathProgramCache]: Analyzing trace with hash -1946171465, now seen corresponding path program 145 times [2022-03-19 02:28:32,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:28:32,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1133847786] [2022-03-19 02:28:32,941 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:28:32,941 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:28:32,941 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:28:32,941 INFO L85 PathProgramCache]: Analyzing trace with hash -1946171465, now seen corresponding path program 146 times [2022-03-19 02:28:32,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:28:32,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586016307] [2022-03-19 02:28:32,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:28:32,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:28:33,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:28:34,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:28:34,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:28:34,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 525 [2022-03-19 02:28:34,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:28:34,818 INFO L134 CoverageAnalysis]: Checked inductivity of 19129 backedges. 0 proven. 5476 refuted. 0 times theorem prover too weak. 13653 trivial. 0 not checked. [2022-03-19 02:28:34,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:28:34,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586016307] [2022-03-19 02:28:34,819 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [586016307] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:28:34,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288851925] [2022-03-19 02:28:34,819 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 02:28:34,819 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:28:34,819 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:28:34,820 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) [2022-03-19 02:28:34,820 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-03-19 02:28:35,533 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 02:28:35,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:28:35,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 2034 conjuncts, 76 conjunts are in the unsatisfiable core [2022-03-19 02:28:35,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:28:36,138 INFO L134 CoverageAnalysis]: Checked inductivity of 19129 backedges. 0 proven. 5476 refuted. 0 times theorem prover too weak. 13653 trivial. 0 not checked. [2022-03-19 02:28:36,139 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:28:41,792 INFO L134 CoverageAnalysis]: Checked inductivity of 19129 backedges. 0 proven. 5476 refuted. 0 times theorem prover too weak. 13653 trivial. 0 not checked. [2022-03-19 02:28:41,793 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [288851925] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:28:41,793 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:28:41,793 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 77, 77] total 155 [2022-03-19 02:28:41,793 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:28:41,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1133847786] [2022-03-19 02:28:41,793 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1133847786] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:28:41,793 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:28:41,793 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [79] imperfect sequences [] total 79 [2022-03-19 02:28:41,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194698330] [2022-03-19 02:28:41,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:28:41,794 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2022-03-19 02:28:41,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:28:41,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2022-03-19 02:28:41,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11632, Invalid=12238, Unknown=0, NotChecked=0, Total=23870 [2022-03-19 02:28:41,796 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) [2022-03-19 02:28:51,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:28:51,207 INFO L93 Difference]: Finished difference Result 3356 states and 4938 transitions. [2022-03-19 02:28:51,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-03-19 02:28:51,208 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 [2022-03-19 02:28:51,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:28:51,211 INFO L225 Difference]: With dead ends: 3356 [2022-03-19 02:28:51,211 INFO L226 Difference]: Without dead ends: 1783 [2022-03-19 02:28:51,214 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 1238 GetRequests, 1008 SyntacticMatches, 0 SemanticMatches, 230 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3517 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=23343, Invalid=30249, Unknown=0, NotChecked=0, Total=53592 [2022-03-19 02:28:51,215 INFO L912 BasicCegarLoop]: 43 mSDtfsCounter, 4226 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 4431 mSolverCounterSat, 2058 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s 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, 2.6s IncrementalHoareTripleChecker+Time [2022-03-19 02:28:51,215 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [4230 Valid, 53 Invalid, 6489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2058 Valid, 4431 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-03-19 02:28:51,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1783 states. [2022-03-19 02:28:52,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1783 to 1751. [2022-03-19 02:28:52,115 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) [2022-03-19 02:28:52,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1751 states to 1751 states and 2502 transitions. [2022-03-19 02:28:52,118 INFO L78 Accepts]: Start accepts. Automaton has 1751 states and 2502 transitions. Word has length 540 [2022-03-19 02:28:52,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:28:52,119 INFO L478 AbstractCegarLoop]: Abstraction has 1751 states and 2502 transitions. [2022-03-19 02:28:52,119 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) [2022-03-19 02:28:52,119 INFO L276 IsEmpty]: Start isEmpty. Operand 1751 states and 2502 transitions. [2022-03-19 02:28:52,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 548 [2022-03-19 02:28:52,124 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:28:52,124 INFO L500 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] [2022-03-19 02:28:52,151 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Ended with exit code 0 [2022-03-19 02:28:52,339 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 [2022-03-19 02:28:52,339 INFO L403 AbstractCegarLoop]: === Iteration 78 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:28:52,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:28:52,339 INFO L85 PathProgramCache]: Analyzing trace with hash 137585845, now seen corresponding path program 147 times [2022-03-19 02:28:52,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:28:52,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [609451269] [2022-03-19 02:28:52,341 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:28:52,341 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:28:52,341 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:28:52,341 INFO L85 PathProgramCache]: Analyzing trace with hash 137585845, now seen corresponding path program 148 times [2022-03-19 02:28:52,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:28:52,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299550170] [2022-03-19 02:28:52,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:28:52,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:28:52,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:28:54,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:28:54,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:28:54,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 532 [2022-03-19 02:28:54,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:28:54,227 INFO L134 CoverageAnalysis]: Checked inductivity of 19650 backedges. 0 proven. 5625 refuted. 0 times theorem prover too weak. 14025 trivial. 0 not checked. [2022-03-19 02:28:54,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:28:54,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299550170] [2022-03-19 02:28:54,227 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299550170] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:28:54,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [879579775] [2022-03-19 02:28:54,227 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 02:28:54,228 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:28:54,228 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:28:54,229 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) [2022-03-19 02:28:54,229 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-03-19 02:28:54,945 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 02:28:54,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:28:54,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 2060 conjuncts, 77 conjunts are in the unsatisfiable core [2022-03-19 02:28:54,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:28:55,681 INFO L134 CoverageAnalysis]: Checked inductivity of 19650 backedges. 0 proven. 14024 refuted. 0 times theorem prover too weak. 5626 trivial. 0 not checked. [2022-03-19 02:28:55,681 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:29:01,363 INFO L134 CoverageAnalysis]: Checked inductivity of 19650 backedges. 0 proven. 14024 refuted. 0 times theorem prover too weak. 5626 trivial. 0 not checked. [2022-03-19 02:29:01,364 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [879579775] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:29:01,364 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:29:01,364 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 78, 78] total 157 [2022-03-19 02:29:01,364 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:29:01,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [609451269] [2022-03-19 02:29:01,364 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [609451269] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:29:01,364 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:29:01,364 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [80] imperfect sequences [] total 80 [2022-03-19 02:29:01,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914418736] [2022-03-19 02:29:01,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:29:01,365 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2022-03-19 02:29:01,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:29:01,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2022-03-19 02:29:01,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11939, Invalid=12553, Unknown=0, NotChecked=0, Total=24492 [2022-03-19 02:29:01,369 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) [2022-03-19 02:29:11,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:29:11,246 INFO L93 Difference]: Finished difference Result 3400 states and 5003 transitions. [2022-03-19 02:29:11,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-03-19 02:29:11,246 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 [2022-03-19 02:29:11,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:29:11,250 INFO L225 Difference]: With dead ends: 3400 [2022-03-19 02:29:11,250 INFO L226 Difference]: Without dead ends: 1806 [2022-03-19 02:29:11,253 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 1254 GetRequests, 1021 SyntacticMatches, 0 SemanticMatches, 233 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3602 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=23958, Invalid=31032, Unknown=0, NotChecked=0, Total=54990 [2022-03-19 02:29:11,254 INFO L912 BasicCegarLoop]: 43 mSDtfsCounter, 4249 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 4820 mSolverCounterSat, 1940 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s 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, 2.8s IncrementalHoareTripleChecker+Time [2022-03-19 02:29:11,254 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [4253 Valid, 57 Invalid, 6760 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1940 Valid, 4820 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-03-19 02:29:11,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1806 states. [2022-03-19 02:29:12,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1806 to 1774. [2022-03-19 02:29:12,199 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) [2022-03-19 02:29:12,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1774 states to 1774 states and 2535 transitions. [2022-03-19 02:29:12,202 INFO L78 Accepts]: Start accepts. Automaton has 1774 states and 2535 transitions. Word has length 547 [2022-03-19 02:29:12,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:29:12,202 INFO L478 AbstractCegarLoop]: Abstraction has 1774 states and 2535 transitions. [2022-03-19 02:29:12,202 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) [2022-03-19 02:29:12,202 INFO L276 IsEmpty]: Start isEmpty. Operand 1774 states and 2535 transitions. [2022-03-19 02:29:12,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 555 [2022-03-19 02:29:12,206 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:29:12,206 INFO L500 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] [2022-03-19 02:29:12,229 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2022-03-19 02:29:12,407 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 [2022-03-19 02:29:12,407 INFO L403 AbstractCegarLoop]: === Iteration 79 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:29:12,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:29:12,407 INFO L85 PathProgramCache]: Analyzing trace with hash -444692869, now seen corresponding path program 149 times [2022-03-19 02:29:12,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:29:12,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [892185271] [2022-03-19 02:29:12,409 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:29:12,409 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:29:12,409 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:29:12,409 INFO L85 PathProgramCache]: Analyzing trace with hash -444692869, now seen corresponding path program 150 times [2022-03-19 02:29:12,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:29:12,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942007418] [2022-03-19 02:29:12,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:29:12,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:29:12,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:29:14,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:29:14,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:29:14,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 539 [2022-03-19 02:29:14,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:29:14,491 INFO L134 CoverageAnalysis]: Checked inductivity of 20178 backedges. 0 proven. 5776 refuted. 0 times theorem prover too weak. 14402 trivial. 0 not checked. [2022-03-19 02:29:14,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:29:14,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942007418] [2022-03-19 02:29:14,491 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942007418] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:29:14,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008011907] [2022-03-19 02:29:14,492 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 02:29:14,492 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:29:14,492 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:29:14,493 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) [2022-03-19 02:29:14,493 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2022-03-19 02:29:15,096 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-19 02:29:15,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:29:15,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-19 02:29:15,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:29:15,818 INFO L134 CoverageAnalysis]: Checked inductivity of 20178 backedges. 301 proven. 1 refuted. 0 times theorem prover too weak. 19876 trivial. 0 not checked. [2022-03-19 02:29:15,819 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:29:16,453 INFO L134 CoverageAnalysis]: Checked inductivity of 20178 backedges. 301 proven. 1 refuted. 0 times theorem prover too weak. 19876 trivial. 0 not checked. [2022-03-19 02:29:16,453 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2008011907] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:29:16,453 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:29:16,454 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 7, 7] total 89 [2022-03-19 02:29:16,454 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:29:16,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [892185271] [2022-03-19 02:29:16,454 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [892185271] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:29:16,454 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:29:16,454 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [81] imperfect sequences [] total 81 [2022-03-19 02:29:16,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35542288] [2022-03-19 02:29:16,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:29:16,477 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2022-03-19 02:29:16,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:29:16,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2022-03-19 02:29:16,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3110, Invalid=4722, Unknown=0, NotChecked=0, Total=7832 [2022-03-19 02:29:16,478 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) [2022-03-19 02:29:24,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:29:24,768 INFO L93 Difference]: Finished difference Result 3444 states and 5068 transitions. [2022-03-19 02:29:24,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-03-19 02:29:24,769 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 [2022-03-19 02:29:24,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:29:24,772 INFO L225 Difference]: With dead ends: 3444 [2022-03-19 02:29:24,772 INFO L226 Difference]: Without dead ends: 1829 [2022-03-19 02:29:24,774 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 1270 GetRequests, 1103 SyntacticMatches, 1 SemanticMatches, 166 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4002 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=9433, Invalid=18623, Unknown=0, NotChecked=0, Total=28056 [2022-03-19 02:29:24,774 INFO L912 BasicCegarLoop]: 43 mSDtfsCounter, 4339 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 4612 mSolverCounterSat, 1923 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s 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, 2.7s IncrementalHoareTripleChecker+Time [2022-03-19 02:29:24,775 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [4343 Valid, 57 Invalid, 6535 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1923 Valid, 4612 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-03-19 02:29:24,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1829 states. [2022-03-19 02:29:25,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1829 to 1797. [2022-03-19 02:29:25,733 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) [2022-03-19 02:29:25,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1797 states to 1797 states and 2568 transitions. [2022-03-19 02:29:25,735 INFO L78 Accepts]: Start accepts. Automaton has 1797 states and 2568 transitions. Word has length 554 [2022-03-19 02:29:25,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:29:25,735 INFO L478 AbstractCegarLoop]: Abstraction has 1797 states and 2568 transitions. [2022-03-19 02:29:25,735 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) [2022-03-19 02:29:25,735 INFO L276 IsEmpty]: Start isEmpty. Operand 1797 states and 2568 transitions. [2022-03-19 02:29:25,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 562 [2022-03-19 02:29:25,741 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:29:25,741 INFO L500 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] [2022-03-19 02:29:25,770 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Forceful destruction successful, exit code 0 [2022-03-19 02:29:25,967 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 [2022-03-19 02:29:25,967 INFO L403 AbstractCegarLoop]: === Iteration 80 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:29:25,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:29:25,968 INFO L85 PathProgramCache]: Analyzing trace with hash 41677809, now seen corresponding path program 151 times [2022-03-19 02:29:25,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:29:25,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1806190279] [2022-03-19 02:29:25,969 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:29:25,969 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:29:25,969 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:29:25,969 INFO L85 PathProgramCache]: Analyzing trace with hash 41677809, now seen corresponding path program 152 times [2022-03-19 02:29:25,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:29:25,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590947240] [2022-03-19 02:29:25,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:29:25,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:29:26,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:29:28,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:29:28,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:29:28,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 546 [2022-03-19 02:29:28,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:29:28,046 INFO L134 CoverageAnalysis]: Checked inductivity of 20713 backedges. 0 proven. 5929 refuted. 0 times theorem prover too weak. 14784 trivial. 0 not checked. [2022-03-19 02:29:28,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:29:28,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590947240] [2022-03-19 02:29:28,047 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590947240] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:29:28,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708875610] [2022-03-19 02:29:28,047 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 02:29:28,047 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:29:28,047 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:29:28,048 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) [2022-03-19 02:29:28,048 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2022-03-19 02:29:28,829 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 02:29:28,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:29:28,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 2112 conjuncts, 79 conjunts are in the unsatisfiable core [2022-03-19 02:29:28,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:29:29,513 INFO L134 CoverageAnalysis]: Checked inductivity of 20713 backedges. 0 proven. 5929 refuted. 0 times theorem prover too weak. 14784 trivial. 0 not checked. [2022-03-19 02:29:29,513 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:29:35,727 INFO L134 CoverageAnalysis]: Checked inductivity of 20713 backedges. 0 proven. 5929 refuted. 0 times theorem prover too weak. 14784 trivial. 0 not checked. [2022-03-19 02:29:35,727 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [708875610] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:29:35,727 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:29:35,727 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 80, 80] total 161 [2022-03-19 02:29:35,727 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:29:35,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1806190279] [2022-03-19 02:29:35,728 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1806190279] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:29:35,728 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:29:35,728 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [82] imperfect sequences [] total 82 [2022-03-19 02:29:35,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98487520] [2022-03-19 02:29:35,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:29:35,728 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2022-03-19 02:29:35,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:29:35,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2022-03-19 02:29:35,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12565, Invalid=13195, Unknown=0, NotChecked=0, Total=25760 [2022-03-19 02:29:35,732 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) [2022-03-19 02:29:46,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:29:46,520 INFO L93 Difference]: Finished difference Result 3488 states and 5133 transitions. [2022-03-19 02:29:46,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-03-19 02:29:46,520 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 [2022-03-19 02:29:46,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:29:46,523 INFO L225 Difference]: With dead ends: 3488 [2022-03-19 02:29:46,523 INFO L226 Difference]: Without dead ends: 1852 [2022-03-19 02:29:46,527 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 1286 GetRequests, 1047 SyntacticMatches, 0 SemanticMatches, 239 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3775 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=25212, Invalid=32628, Unknown=0, NotChecked=0, Total=57840 [2022-03-19 02:29:46,528 INFO L912 BasicCegarLoop]: 43 mSDtfsCounter, 4679 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 4512 mSolverCounterSat, 2189 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s 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, 2.8s IncrementalHoareTripleChecker+Time [2022-03-19 02:29:46,528 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [4683 Valid, 51 Invalid, 6701 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2189 Valid, 4512 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-03-19 02:29:46,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1852 states. [2022-03-19 02:29:47,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1852 to 1820. [2022-03-19 02:29:47,507 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) [2022-03-19 02:29:47,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1820 states to 1820 states and 2601 transitions. [2022-03-19 02:29:47,510 INFO L78 Accepts]: Start accepts. Automaton has 1820 states and 2601 transitions. Word has length 561 [2022-03-19 02:29:47,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:29:47,510 INFO L478 AbstractCegarLoop]: Abstraction has 1820 states and 2601 transitions. [2022-03-19 02:29:47,510 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) [2022-03-19 02:29:47,510 INFO L276 IsEmpty]: Start isEmpty. Operand 1820 states and 2601 transitions. [2022-03-19 02:29:47,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 569 [2022-03-19 02:29:47,514 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:29:47,514 INFO L500 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] [2022-03-19 02:29:47,536 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Ended with exit code 0 [2022-03-19 02:29:47,715 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 [2022-03-19 02:29:47,715 INFO L403 AbstractCegarLoop]: === Iteration 81 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:29:47,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:29:47,715 INFO L85 PathProgramCache]: Analyzing trace with hash 562460991, now seen corresponding path program 153 times [2022-03-19 02:29:47,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:29:47,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1882187069] [2022-03-19 02:29:47,717 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:29:47,717 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:29:47,717 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:29:47,717 INFO L85 PathProgramCache]: Analyzing trace with hash 562460991, now seen corresponding path program 154 times [2022-03-19 02:29:47,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:29:47,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756182215] [2022-03-19 02:29:47,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:29:47,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:29:47,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:29:49,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:29:49,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:29:49,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 553 [2022-03-19 02:29:49,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:29:49,798 INFO L134 CoverageAnalysis]: Checked inductivity of 21255 backedges. 0 proven. 6084 refuted. 0 times theorem prover too weak. 15171 trivial. 0 not checked. [2022-03-19 02:29:49,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:29:49,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756182215] [2022-03-19 02:29:49,798 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756182215] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:29:49,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094186178] [2022-03-19 02:29:49,798 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 02:29:49,798 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:29:49,798 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:29:49,799 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) [2022-03-19 02:29:49,800 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2022-03-19 02:29:50,624 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 02:29:50,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:29:50,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 2138 conjuncts, 80 conjunts are in the unsatisfiable core [2022-03-19 02:29:50,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:29:51,387 INFO L134 CoverageAnalysis]: Checked inductivity of 21255 backedges. 0 proven. 6084 refuted. 0 times theorem prover too weak. 15171 trivial. 0 not checked. [2022-03-19 02:29:51,387 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:29:57,534 INFO L134 CoverageAnalysis]: Checked inductivity of 21255 backedges. 0 proven. 6084 refuted. 0 times theorem prover too weak. 15171 trivial. 0 not checked. [2022-03-19 02:29:57,534 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2094186178] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:29:57,534 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:29:57,534 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 81, 81] total 163 [2022-03-19 02:29:57,535 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:29:57,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1882187069] [2022-03-19 02:29:57,535 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1882187069] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:29:57,535 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:29:57,535 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [83] imperfect sequences [] total 83 [2022-03-19 02:29:57,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035431723] [2022-03-19 02:29:57,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:29:57,535 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2022-03-19 02:29:57,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:29:57,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2022-03-19 02:29:57,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12884, Invalid=13522, Unknown=0, NotChecked=0, Total=26406 [2022-03-19 02:29:57,539 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) [2022-03-19 02:30:08,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:30:08,282 INFO L93 Difference]: Finished difference Result 3532 states and 5198 transitions. [2022-03-19 02:30:08,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-03-19 02:30:08,283 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 [2022-03-19 02:30:08,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:30:08,286 INFO L225 Difference]: With dead ends: 3532 [2022-03-19 02:30:08,286 INFO L226 Difference]: Without dead ends: 1875 [2022-03-19 02:30:08,293 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 1302 GetRequests, 1060 SyntacticMatches, 0 SemanticMatches, 242 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3863 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=25851, Invalid=33441, Unknown=0, NotChecked=0, Total=59292 [2022-03-19 02:30:08,294 INFO L912 BasicCegarLoop]: 43 mSDtfsCounter, 4723 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 4601 mSolverCounterSat, 2151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s 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, 2.8s IncrementalHoareTripleChecker+Time [2022-03-19 02:30:08,294 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [4727 Valid, 53 Invalid, 6752 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2151 Valid, 4601 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-03-19 02:30:08,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1875 states. [2022-03-19 02:30:09,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1875 to 1843. [2022-03-19 02:30:09,296 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) [2022-03-19 02:30:09,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1843 states to 1843 states and 2634 transitions. [2022-03-19 02:30:09,298 INFO L78 Accepts]: Start accepts. Automaton has 1843 states and 2634 transitions. Word has length 568 [2022-03-19 02:30:09,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:30:09,298 INFO L478 AbstractCegarLoop]: Abstraction has 1843 states and 2634 transitions. [2022-03-19 02:30:09,299 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) [2022-03-19 02:30:09,299 INFO L276 IsEmpty]: Start isEmpty. Operand 1843 states and 2634 transitions. [2022-03-19 02:30:09,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 576 [2022-03-19 02:30:09,303 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:30:09,303 INFO L500 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] [2022-03-19 02:30:09,326 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Forceful destruction successful, exit code 0 [2022-03-19 02:30:09,505 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 [2022-03-19 02:30:09,505 INFO L403 AbstractCegarLoop]: === Iteration 82 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:30:09,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:30:09,505 INFO L85 PathProgramCache]: Analyzing trace with hash 1935388461, now seen corresponding path program 155 times [2022-03-19 02:30:09,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:30:09,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [113556734] [2022-03-19 02:30:09,507 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:30:09,507 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:30:09,507 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:30:09,507 INFO L85 PathProgramCache]: Analyzing trace with hash 1935388461, now seen corresponding path program 156 times [2022-03-19 02:30:09,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:30:09,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497903260] [2022-03-19 02:30:09,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:30:09,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:30:09,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:30:11,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:30:11,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:30:11,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 560 [2022-03-19 02:30:11,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:30:11,799 INFO L134 CoverageAnalysis]: Checked inductivity of 21804 backedges. 0 proven. 6241 refuted. 0 times theorem prover too weak. 15563 trivial. 0 not checked. [2022-03-19 02:30:11,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:30:11,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497903260] [2022-03-19 02:30:11,800 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497903260] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:30:11,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1826851727] [2022-03-19 02:30:11,800 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 02:30:11,800 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:30:11,800 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:30:11,802 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) [2022-03-19 02:30:11,802 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2022-03-19 02:30:12,450 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-19 02:30:12,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:30:12,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-19 02:30:12,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:30:13,181 INFO L134 CoverageAnalysis]: Checked inductivity of 21804 backedges. 313 proven. 1 refuted. 0 times theorem prover too weak. 21490 trivial. 0 not checked. [2022-03-19 02:30:13,181 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:30:13,821 INFO L134 CoverageAnalysis]: Checked inductivity of 21804 backedges. 313 proven. 1 refuted. 0 times theorem prover too weak. 21490 trivial. 0 not checked. [2022-03-19 02:30:13,821 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1826851727] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:30:13,821 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:30:13,821 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 7, 7] total 92 [2022-03-19 02:30:13,821 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:30:13,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [113556734] [2022-03-19 02:30:13,821 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [113556734] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:30:13,821 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:30:13,821 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [84] imperfect sequences [] total 84 [2022-03-19 02:30:13,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263822522] [2022-03-19 02:30:13,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:30:13,822 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2022-03-19 02:30:13,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:30:13,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2022-03-19 02:30:13,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3350, Invalid=5022, Unknown=0, NotChecked=0, Total=8372 [2022-03-19 02:30:13,823 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) [2022-03-19 02:30:22,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:30:22,780 INFO L93 Difference]: Finished difference Result 3576 states and 5263 transitions. [2022-03-19 02:30:22,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-03-19 02:30:22,780 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 [2022-03-19 02:30:22,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:30:22,783 INFO L225 Difference]: With dead ends: 3576 [2022-03-19 02:30:22,783 INFO L226 Difference]: Without dead ends: 1898 [2022-03-19 02:30:22,787 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 1318 GetRequests, 1145 SyntacticMatches, 1 SemanticMatches, 172 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4278 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=10159, Invalid=19943, Unknown=0, NotChecked=0, Total=30102 [2022-03-19 02:30:22,787 INFO L912 BasicCegarLoop]: 43 mSDtfsCounter, 4567 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 4589 mSolverCounterSat, 2090 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s 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, 2.8s IncrementalHoareTripleChecker+Time [2022-03-19 02:30:22,787 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [4571 Valid, 57 Invalid, 6679 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2090 Valid, 4589 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-03-19 02:30:22,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1898 states. [2022-03-19 02:30:23,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1898 to 1866. [2022-03-19 02:30:23,820 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) [2022-03-19 02:30:23,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1866 states to 1866 states and 2667 transitions. [2022-03-19 02:30:23,823 INFO L78 Accepts]: Start accepts. Automaton has 1866 states and 2667 transitions. Word has length 575 [2022-03-19 02:30:23,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:30:23,823 INFO L478 AbstractCegarLoop]: Abstraction has 1866 states and 2667 transitions. [2022-03-19 02:30:23,823 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) [2022-03-19 02:30:23,823 INFO L276 IsEmpty]: Start isEmpty. Operand 1866 states and 2667 transitions. [2022-03-19 02:30:23,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 583 [2022-03-19 02:30:23,830 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:30:23,830 INFO L500 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] [2022-03-19 02:30:23,859 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Forceful destruction successful, exit code 0 [2022-03-19 02:30:24,055 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 [2022-03-19 02:30:24,055 INFO L403 AbstractCegarLoop]: === Iteration 83 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:30:24,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:30:24,056 INFO L85 PathProgramCache]: Analyzing trace with hash 2104942595, now seen corresponding path program 157 times [2022-03-19 02:30:24,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:30:24,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2023438709] [2022-03-19 02:30:24,057 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:30:24,057 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:30:24,057 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:30:24,057 INFO L85 PathProgramCache]: Analyzing trace with hash 2104942595, now seen corresponding path program 158 times [2022-03-19 02:30:24,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:30:24,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343515576] [2022-03-19 02:30:24,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:30:24,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:30:24,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:30:26,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:30:26,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:30:26,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 567 [2022-03-19 02:30:26,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:30:26,428 INFO L134 CoverageAnalysis]: Checked inductivity of 22360 backedges. 0 proven. 6400 refuted. 0 times theorem prover too weak. 15960 trivial. 0 not checked. [2022-03-19 02:30:26,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:30:26,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343515576] [2022-03-19 02:30:26,428 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343515576] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:30:26,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [718061946] [2022-03-19 02:30:26,428 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 02:30:26,428 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:30:26,428 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:30:26,429 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) [2022-03-19 02:30:26,430 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2022-03-19 02:30:27,267 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 02:30:27,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:30:27,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 2190 conjuncts, 82 conjunts are in the unsatisfiable core [2022-03-19 02:30:27,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:30:27,927 INFO L134 CoverageAnalysis]: Checked inductivity of 22360 backedges. 0 proven. 6400 refuted. 0 times theorem prover too weak. 15960 trivial. 0 not checked. [2022-03-19 02:30:27,928 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:30:34,518 INFO L134 CoverageAnalysis]: Checked inductivity of 22360 backedges. 0 proven. 6400 refuted. 0 times theorem prover too weak. 15960 trivial. 0 not checked. [2022-03-19 02:30:34,519 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [718061946] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:30:34,519 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:30:34,519 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 83, 83] total 167 [2022-03-19 02:30:34,519 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:30:34,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2023438709] [2022-03-19 02:30:34,519 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2023438709] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:30:34,519 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:30:34,519 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [85] imperfect sequences [] total 85 [2022-03-19 02:30:34,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973082994] [2022-03-19 02:30:34,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:30:34,520 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2022-03-19 02:30:34,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:30:34,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2022-03-19 02:30:34,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13534, Invalid=14188, Unknown=0, NotChecked=0, Total=27722 [2022-03-19 02:30:34,522 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) [2022-03-19 02:30:45,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:30:45,760 INFO L93 Difference]: Finished difference Result 3620 states and 5328 transitions. [2022-03-19 02:30:45,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-03-19 02:30:45,761 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 [2022-03-19 02:30:45,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:30:45,764 INFO L225 Difference]: With dead ends: 3620 [2022-03-19 02:30:45,764 INFO L226 Difference]: Without dead ends: 1921 [2022-03-19 02:30:45,768 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 1334 GetRequests, 1086 SyntacticMatches, 0 SemanticMatches, 248 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4042 ImplicationChecksByTransitivity, 10.4s TimeCoverageRelationStatistics Valid=27153, Invalid=35097, Unknown=0, NotChecked=0, Total=62250 [2022-03-19 02:30:45,768 INFO L912 BasicCegarLoop]: 43 mSDtfsCounter, 4692 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 4742 mSolverCounterSat, 2293 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s 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, 2.9s IncrementalHoareTripleChecker+Time [2022-03-19 02:30:45,768 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [4696 Valid, 53 Invalid, 7035 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2293 Valid, 4742 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-03-19 02:30:45,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1921 states. [2022-03-19 02:30:46,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1921 to 1889. [2022-03-19 02:30:46,861 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) [2022-03-19 02:30:46,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1889 states to 1889 states and 2700 transitions. [2022-03-19 02:30:46,864 INFO L78 Accepts]: Start accepts. Automaton has 1889 states and 2700 transitions. Word has length 582 [2022-03-19 02:30:46,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:30:46,864 INFO L478 AbstractCegarLoop]: Abstraction has 1889 states and 2700 transitions. [2022-03-19 02:30:46,864 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) [2022-03-19 02:30:46,864 INFO L276 IsEmpty]: Start isEmpty. Operand 1889 states and 2700 transitions. [2022-03-19 02:30:46,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 590 [2022-03-19 02:30:46,869 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:30:46,869 INFO L500 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] [2022-03-19 02:30:46,892 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Ended with exit code 0 [2022-03-19 02:30:47,069 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 [2022-03-19 02:30:47,069 INFO L403 AbstractCegarLoop]: === Iteration 84 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:30:47,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:30:47,070 INFO L85 PathProgramCache]: Analyzing trace with hash 1236489833, now seen corresponding path program 159 times [2022-03-19 02:30:47,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:30:47,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [361923608] [2022-03-19 02:30:47,071 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:30:47,071 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:30:47,071 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:30:47,071 INFO L85 PathProgramCache]: Analyzing trace with hash 1236489833, now seen corresponding path program 160 times [2022-03-19 02:30:47,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:30:47,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809864799] [2022-03-19 02:30:47,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:30:47,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:30:47,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:30:49,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:30:49,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:30:49,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 574 [2022-03-19 02:30:49,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:30:49,314 INFO L134 CoverageAnalysis]: Checked inductivity of 22923 backedges. 0 proven. 6561 refuted. 0 times theorem prover too weak. 16362 trivial. 0 not checked. [2022-03-19 02:30:49,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:30:49,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809864799] [2022-03-19 02:30:49,314 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809864799] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:30:49,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282116272] [2022-03-19 02:30:49,314 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 02:30:49,314 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:30:49,314 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:30:49,315 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) [2022-03-19 02:30:49,316 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2022-03-19 02:30:50,135 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 02:30:50,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:30:50,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 2216 conjuncts, 83 conjunts are in the unsatisfiable core [2022-03-19 02:30:50,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:30:50,969 INFO L134 CoverageAnalysis]: Checked inductivity of 22923 backedges. 0 proven. 16361 refuted. 0 times theorem prover too weak. 6562 trivial. 0 not checked. [2022-03-19 02:30:50,970 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:30:57,674 INFO L134 CoverageAnalysis]: Checked inductivity of 22923 backedges. 0 proven. 16361 refuted. 0 times theorem prover too weak. 6562 trivial. 0 not checked. [2022-03-19 02:30:57,674 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1282116272] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:30:57,674 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:30:57,675 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 84, 84] total 169 [2022-03-19 02:30:57,675 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:30:57,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [361923608] [2022-03-19 02:30:57,675 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [361923608] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:30:57,675 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:30:57,675 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [86] imperfect sequences [] total 86 [2022-03-19 02:30:57,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283374589] [2022-03-19 02:30:57,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:30:57,675 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2022-03-19 02:30:57,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:30:57,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2022-03-19 02:30:57,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13865, Invalid=14527, Unknown=0, NotChecked=0, Total=28392 [2022-03-19 02:30:57,680 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) [2022-03-19 02:31:09,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:31:09,483 INFO L93 Difference]: Finished difference Result 3664 states and 5393 transitions. [2022-03-19 02:31:09,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-03-19 02:31:09,483 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 [2022-03-19 02:31:09,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:31:09,487 INFO L225 Difference]: With dead ends: 3664 [2022-03-19 02:31:09,487 INFO L226 Difference]: Without dead ends: 1944 [2022-03-19 02:31:09,491 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 1350 GetRequests, 1099 SyntacticMatches, 0 SemanticMatches, 251 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4133 ImplicationChecksByTransitivity, 10.5s TimeCoverageRelationStatistics Valid=27816, Invalid=35940, Unknown=0, NotChecked=0, Total=63756 [2022-03-19 02:31:09,491 INFO L912 BasicCegarLoop]: 43 mSDtfsCounter, 4830 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 4725 mSolverCounterSat, 2288 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s 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, 3.0s IncrementalHoareTripleChecker+Time [2022-03-19 02:31:09,491 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [4834 Valid, 51 Invalid, 7013 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2288 Valid, 4725 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-03-19 02:31:09,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1944 states. [2022-03-19 02:31:10,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1944 to 1912. [2022-03-19 02:31:10,567 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) [2022-03-19 02:31:10,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1912 states to 1912 states and 2733 transitions. [2022-03-19 02:31:10,570 INFO L78 Accepts]: Start accepts. Automaton has 1912 states and 2733 transitions. Word has length 589 [2022-03-19 02:31:10,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:31:10,570 INFO L478 AbstractCegarLoop]: Abstraction has 1912 states and 2733 transitions. [2022-03-19 02:31:10,570 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) [2022-03-19 02:31:10,570 INFO L276 IsEmpty]: Start isEmpty. Operand 1912 states and 2733 transitions. [2022-03-19 02:31:10,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 597 [2022-03-19 02:31:10,574 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:31:10,575 INFO L500 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] [2022-03-19 02:31:10,596 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Ended with exit code 0 [2022-03-19 02:31:10,775 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 [2022-03-19 02:31:10,775 INFO L403 AbstractCegarLoop]: === Iteration 85 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:31:10,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:31:10,776 INFO L85 PathProgramCache]: Analyzing trace with hash -2026964281, now seen corresponding path program 161 times [2022-03-19 02:31:10,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:31:10,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1681275547] [2022-03-19 02:31:10,777 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:31:10,777 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:31:10,777 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:31:10,777 INFO L85 PathProgramCache]: Analyzing trace with hash -2026964281, now seen corresponding path program 162 times [2022-03-19 02:31:10,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:31:10,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301506094] [2022-03-19 02:31:10,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:31:10,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:31:10,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:31:13,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:31:13,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:31:13,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 581 [2022-03-19 02:31:13,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:31:13,078 INFO L134 CoverageAnalysis]: Checked inductivity of 23493 backedges. 0 proven. 6724 refuted. 0 times theorem prover too weak. 16769 trivial. 0 not checked. [2022-03-19 02:31:13,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:31:13,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301506094] [2022-03-19 02:31:13,078 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301506094] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:31:13,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963415636] [2022-03-19 02:31:13,078 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 02:31:13,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:31:13,078 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:31:13,080 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) [2022-03-19 02:31:13,104 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2022-03-19 02:31:13,774 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-19 02:31:13,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:31:13,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-19 02:31:13,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:31:14,592 INFO L134 CoverageAnalysis]: Checked inductivity of 23493 backedges. 325 proven. 1 refuted. 0 times theorem prover too weak. 23167 trivial. 0 not checked. [2022-03-19 02:31:14,592 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:31:15,277 INFO L134 CoverageAnalysis]: Checked inductivity of 23493 backedges. 325 proven. 1 refuted. 0 times theorem prover too weak. 23167 trivial. 0 not checked. [2022-03-19 02:31:15,277 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [963415636] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:31:15,277 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:31:15,277 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 7, 7] total 95 [2022-03-19 02:31:15,277 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:31:15,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1681275547] [2022-03-19 02:31:15,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1681275547] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:31:15,278 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:31:15,278 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [87] imperfect sequences [] total 87 [2022-03-19 02:31:15,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386609816] [2022-03-19 02:31:15,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:31:15,278 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2022-03-19 02:31:15,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:31:15,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2022-03-19 02:31:15,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3599, Invalid=5331, Unknown=0, NotChecked=0, Total=8930 [2022-03-19 02:31:15,279 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) [2022-03-19 02:31:25,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:31:25,004 INFO L93 Difference]: Finished difference Result 3708 states and 5458 transitions. [2022-03-19 02:31:25,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-03-19 02:31:25,004 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 [2022-03-19 02:31:25,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:31:25,008 INFO L225 Difference]: With dead ends: 3708 [2022-03-19 02:31:25,008 INFO L226 Difference]: Without dead ends: 1967 [2022-03-19 02:31:25,011 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 1366 GetRequests, 1187 SyntacticMatches, 1 SemanticMatches, 178 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4563 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=10912, Invalid=21308, Unknown=0, NotChecked=0, Total=32220 [2022-03-19 02:31:25,012 INFO L912 BasicCegarLoop]: 43 mSDtfsCounter, 5067 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 4907 mSolverCounterSat, 2355 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s 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, 3.0s IncrementalHoareTripleChecker+Time [2022-03-19 02:31:25,012 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [5071 Valid, 55 Invalid, 7262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2355 Valid, 4907 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-03-19 02:31:25,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1967 states. [2022-03-19 02:31:26,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1967 to 1935. [2022-03-19 02:31:26,115 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) [2022-03-19 02:31:26,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1935 states to 1935 states and 2766 transitions. [2022-03-19 02:31:26,118 INFO L78 Accepts]: Start accepts. Automaton has 1935 states and 2766 transitions. Word has length 596 [2022-03-19 02:31:26,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:31:26,118 INFO L478 AbstractCegarLoop]: Abstraction has 1935 states and 2766 transitions. [2022-03-19 02:31:26,118 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) [2022-03-19 02:31:26,118 INFO L276 IsEmpty]: Start isEmpty. Operand 1935 states and 2766 transitions. [2022-03-19 02:31:26,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 604 [2022-03-19 02:31:26,123 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:31:26,123 INFO L500 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] [2022-03-19 02:31:26,143 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Ended with exit code 0 [2022-03-19 02:31:26,323 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 [2022-03-19 02:31:26,324 INFO L403 AbstractCegarLoop]: === Iteration 86 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:31:26,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:31:26,324 INFO L85 PathProgramCache]: Analyzing trace with hash 1373874597, now seen corresponding path program 163 times [2022-03-19 02:31:26,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:31:26,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1995992216] [2022-03-19 02:31:26,325 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:31:26,326 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:31:26,326 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:31:26,326 INFO L85 PathProgramCache]: Analyzing trace with hash 1373874597, now seen corresponding path program 164 times [2022-03-19 02:31:26,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:31:26,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704098644] [2022-03-19 02:31:26,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:31:26,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:31:26,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:31:28,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:31:28,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:31:28,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 588 [2022-03-19 02:31:28,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:31:28,739 INFO L134 CoverageAnalysis]: Checked inductivity of 24070 backedges. 0 proven. 6889 refuted. 0 times theorem prover too weak. 17181 trivial. 0 not checked. [2022-03-19 02:31:28,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:31:28,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704098644] [2022-03-19 02:31:28,740 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704098644] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:31:28,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [219560008] [2022-03-19 02:31:28,740 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 02:31:28,740 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:31:28,740 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:31:28,741 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) [2022-03-19 02:31:28,741 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2022-03-19 02:31:29,601 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 02:31:29,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:31:29,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 2268 conjuncts, 85 conjunts are in the unsatisfiable core [2022-03-19 02:31:29,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:31:30,323 INFO L134 CoverageAnalysis]: Checked inductivity of 24070 backedges. 0 proven. 6889 refuted. 0 times theorem prover too weak. 17181 trivial. 0 not checked. [2022-03-19 02:31:30,323 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:31:37,214 INFO L134 CoverageAnalysis]: Checked inductivity of 24070 backedges. 0 proven. 6889 refuted. 0 times theorem prover too weak. 17181 trivial. 0 not checked. [2022-03-19 02:31:37,214 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [219560008] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:31:37,214 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:31:37,214 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 86, 86] total 173 [2022-03-19 02:31:37,215 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:31:37,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1995992216] [2022-03-19 02:31:37,215 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1995992216] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:31:37,215 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:31:37,215 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [88] imperfect sequences [] total 88 [2022-03-19 02:31:37,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508432190] [2022-03-19 02:31:37,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:31:37,215 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2022-03-19 02:31:37,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:31:37,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2022-03-19 02:31:37,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14539, Invalid=15217, Unknown=0, NotChecked=0, Total=29756 [2022-03-19 02:31:37,220 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)