/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/acceleratedInterpolationQvasr_64.epf -i ../../../trunk/examples/svcomp/loops/n.c24.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-20 17:46:16,688 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 17:46:16,690 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 17:46:16,712 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-20 17:46:16,712 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-20 17:46:16,713 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-20 17:46:16,714 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-20 17:46:16,716 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-20 17:46:16,717 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-20 17:46:16,718 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-20 17:46:16,719 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-20 17:46:16,720 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-20 17:46:16,720 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-20 17:46:16,721 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-20 17:46:16,722 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-20 17:46:16,722 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-20 17:46:16,723 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-20 17:46:16,724 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-20 17:46:16,725 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-20 17:46:16,727 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-20 17:46:16,728 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-20 17:46:16,729 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-20 17:46:16,729 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-20 17:46:16,730 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-20 17:46:16,731 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-20 17:46:16,733 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-03-20 17:46:16,733 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-03-20 17:46:16,734 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-03-20 17:46:16,734 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-03-20 17:46:16,735 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-03-20 17:46:16,735 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-03-20 17:46:16,735 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-03-20 17:46:16,736 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-03-20 17:46:16,736 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-03-20 17:46:16,737 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-03-20 17:46:16,738 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-03-20 17:46:16,738 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-03-20 17:46:16,739 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-03-20 17:46:16,739 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-03-20 17:46:16,739 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-20 17:46:16,740 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-20 17:46:16,745 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-20 17:46:16,745 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-03-20 17:46:16,753 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 17:46:16,753 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 17:46:16,754 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 17:46:16,754 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 17:46:16,754 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 17:46:16,754 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 17:46:16,755 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 17:46:16,755 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 17:46:16,755 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 17:46:16,755 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 17:46:16,755 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 17:46:16,755 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 17:46:16,756 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 17:46:16,756 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-20 17:46:16,756 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 17:46:16,756 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 17:46:16,756 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 17:46:16,756 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-20 17:46:16,757 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-20 17:46:16,757 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-20 17:46:16,757 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-20 17:46:16,757 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-03-20 17:46:16,757 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 17:46:17,004 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 17:46:17,024 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 17:46:17,026 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 17:46:17,027 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 17:46:17,030 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 17:46:17,031 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/n.c24.i [2022-03-20 17:46:17,085 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1e2a61235/edd4250ff5eb4df79aca1d18663fdd2c/FLAGb87977a5d [2022-03-20 17:46:17,510 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 17:46:17,511 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/n.c24.i [2022-03-20 17:46:17,521 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1e2a61235/edd4250ff5eb4df79aca1d18663fdd2c/FLAGb87977a5d [2022-03-20 17:46:17,532 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1e2a61235/edd4250ff5eb4df79aca1d18663fdd2c [2022-03-20 17:46:17,534 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 17:46:17,536 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-20 17:46:17,538 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 17:46:17,539 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 17:46:17,545 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 17:46:17,546 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 05:46:17" (1/1) ... [2022-03-20 17:46:17,547 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@43505cbb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:46:17, skipping insertion in model container [2022-03-20 17:46:17,547 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 05:46:17" (1/1) ... [2022-03-20 17:46:17,552 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 17:46:17,583 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 17:46:17,770 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/n.c24.i[805,818] [2022-03-20 17:46:17,838 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 17:46:17,851 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 17:46:17,862 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/n.c24.i[805,818] [2022-03-20 17:46:17,883 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 17:46:17,903 INFO L208 MainTranslator]: Completed translation [2022-03-20 17:46:17,903 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:46:17 WrapperNode [2022-03-20 17:46:17,904 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 17:46:17,905 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 17:46:17,905 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 17:46:17,905 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 17:46:17,914 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:46:17" (1/1) ... [2022-03-20 17:46:17,915 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:46:17" (1/1) ... [2022-03-20 17:46:17,934 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:46:17" (1/1) ... [2022-03-20 17:46:17,934 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:46:17" (1/1) ... [2022-03-20 17:46:17,959 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:46:17" (1/1) ... [2022-03-20 17:46:17,963 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:46:17" (1/1) ... [2022-03-20 17:46:17,965 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:46:17" (1/1) ... [2022-03-20 17:46:17,970 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 17:46:17,971 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 17:46:17,971 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 17:46:17,971 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 17:46:17,972 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:46:17" (1/1) ... [2022-03-20 17:46:17,978 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 17:46:17,986 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:46:18,001 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-20 17:46:18,027 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-20 17:46:18,043 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 17:46:18,043 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 17:46:18,044 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 17:46:18,044 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-20 17:46:18,044 INFO L138 BoogieDeclarations]: Found implementation of procedure bar [2022-03-20 17:46:18,044 INFO L138 BoogieDeclarations]: Found implementation of procedure foo [2022-03-20 17:46:18,044 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 17:46:18,044 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memmove [2022-03-20 17:46:18,044 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-20 17:46:18,045 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 17:46:18,045 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-03-20 17:46:18,045 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-03-20 17:46:18,045 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 17:46:18,045 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 17:46:18,046 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-20 17:46:18,047 INFO L130 BoogieDeclarations]: Found specification of procedure memcpy [2022-03-20 17:46:18,047 INFO L130 BoogieDeclarations]: Found specification of procedure memmove [2022-03-20 17:46:18,047 INFO L130 BoogieDeclarations]: Found specification of procedure memccpy [2022-03-20 17:46:18,048 INFO L130 BoogieDeclarations]: Found specification of procedure memset [2022-03-20 17:46:18,048 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2022-03-20 17:46:18,048 INFO L130 BoogieDeclarations]: Found specification of procedure memchr [2022-03-20 17:46:18,048 INFO L130 BoogieDeclarations]: Found specification of procedure strcpy [2022-03-20 17:46:18,048 INFO L130 BoogieDeclarations]: Found specification of procedure strncpy [2022-03-20 17:46:18,048 INFO L130 BoogieDeclarations]: Found specification of procedure strcat [2022-03-20 17:46:18,048 INFO L130 BoogieDeclarations]: Found specification of procedure strncat [2022-03-20 17:46:18,048 INFO L130 BoogieDeclarations]: Found specification of procedure strcmp [2022-03-20 17:46:18,048 INFO L130 BoogieDeclarations]: Found specification of procedure strncmp [2022-03-20 17:46:18,048 INFO L130 BoogieDeclarations]: Found specification of procedure strcoll [2022-03-20 17:46:18,048 INFO L130 BoogieDeclarations]: Found specification of procedure strxfrm [2022-03-20 17:46:18,048 INFO L130 BoogieDeclarations]: Found specification of procedure strcoll_l [2022-03-20 17:46:18,049 INFO L130 BoogieDeclarations]: Found specification of procedure strxfrm_l [2022-03-20 17:46:18,049 INFO L130 BoogieDeclarations]: Found specification of procedure strdup [2022-03-20 17:46:18,049 INFO L130 BoogieDeclarations]: Found specification of procedure strndup [2022-03-20 17:46:18,049 INFO L130 BoogieDeclarations]: Found specification of procedure strchr [2022-03-20 17:46:18,049 INFO L130 BoogieDeclarations]: Found specification of procedure strrchr [2022-03-20 17:46:18,049 INFO L130 BoogieDeclarations]: Found specification of procedure strcspn [2022-03-20 17:46:18,049 INFO L130 BoogieDeclarations]: Found specification of procedure strspn [2022-03-20 17:46:18,049 INFO L130 BoogieDeclarations]: Found specification of procedure strpbrk [2022-03-20 17:46:18,049 INFO L130 BoogieDeclarations]: Found specification of procedure strstr [2022-03-20 17:46:18,049 INFO L130 BoogieDeclarations]: Found specification of procedure strtok [2022-03-20 17:46:18,049 INFO L130 BoogieDeclarations]: Found specification of procedure __strtok_r [2022-03-20 17:46:18,050 INFO L130 BoogieDeclarations]: Found specification of procedure strtok_r [2022-03-20 17:46:18,050 INFO L130 BoogieDeclarations]: Found specification of procedure strlen [2022-03-20 17:46:18,050 INFO L130 BoogieDeclarations]: Found specification of procedure strnlen [2022-03-20 17:46:18,050 INFO L130 BoogieDeclarations]: Found specification of procedure strerror [2022-03-20 17:46:18,050 INFO L130 BoogieDeclarations]: Found specification of procedure strerror_r [2022-03-20 17:46:18,050 INFO L130 BoogieDeclarations]: Found specification of procedure strerror_l [2022-03-20 17:46:18,050 INFO L130 BoogieDeclarations]: Found specification of procedure __bzero [2022-03-20 17:46:18,050 INFO L130 BoogieDeclarations]: Found specification of procedure bcopy [2022-03-20 17:46:18,050 INFO L130 BoogieDeclarations]: Found specification of procedure bzero [2022-03-20 17:46:18,050 INFO L130 BoogieDeclarations]: Found specification of procedure bcmp [2022-03-20 17:46:18,050 INFO L130 BoogieDeclarations]: Found specification of procedure index [2022-03-20 17:46:18,050 INFO L130 BoogieDeclarations]: Found specification of procedure rindex [2022-03-20 17:46:18,051 INFO L130 BoogieDeclarations]: Found specification of procedure ffs [2022-03-20 17:46:18,051 INFO L130 BoogieDeclarations]: Found specification of procedure strcasecmp [2022-03-20 17:46:18,051 INFO L130 BoogieDeclarations]: Found specification of procedure strncasecmp [2022-03-20 17:46:18,051 INFO L130 BoogieDeclarations]: Found specification of procedure strsep [2022-03-20 17:46:18,051 INFO L130 BoogieDeclarations]: Found specification of procedure strsignal [2022-03-20 17:46:18,051 INFO L130 BoogieDeclarations]: Found specification of procedure __stpcpy [2022-03-20 17:46:18,051 INFO L130 BoogieDeclarations]: Found specification of procedure stpcpy [2022-03-20 17:46:18,051 INFO L130 BoogieDeclarations]: Found specification of procedure __stpncpy [2022-03-20 17:46:18,051 INFO L130 BoogieDeclarations]: Found specification of procedure stpncpy [2022-03-20 17:46:18,051 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-20 17:46:18,051 INFO L130 BoogieDeclarations]: Found specification of procedure bar [2022-03-20 17:46:18,052 INFO L130 BoogieDeclarations]: Found specification of procedure foo [2022-03-20 17:46:18,052 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 17:46:18,052 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 17:46:18,052 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 17:46:18,052 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-03-20 17:46:18,052 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memmove [2022-03-20 17:46:18,052 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 17:46:18,052 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 17:46:18,052 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 17:46:18,052 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 17:46:18,052 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2022-03-20 17:46:18,052 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2022-03-20 17:46:18,187 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 17:46:18,188 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 17:46:18,380 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 17:46:18,386 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 17:46:18,386 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2022-03-20 17:46:18,387 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 05:46:18 BoogieIcfgContainer [2022-03-20 17:46:18,388 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 17:46:18,389 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 17:46:18,389 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 17:46:18,403 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 17:46:18,404 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 05:46:17" (1/3) ... [2022-03-20 17:46:18,404 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35a36e49 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 05:46:18, skipping insertion in model container [2022-03-20 17:46:18,404 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:46:17" (2/3) ... [2022-03-20 17:46:18,405 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35a36e49 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 05:46:18, skipping insertion in model container [2022-03-20 17:46:18,405 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 05:46:18" (3/3) ... [2022-03-20 17:46:18,406 INFO L111 eAbstractionObserver]: Analyzing ICFG n.c24.i [2022-03-20 17:46:18,410 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-20 17:46:18,410 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 17:46:18,452 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 17:46:18,460 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=Craig_NestedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-20 17:46:18,460 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 17:46:18,478 INFO L276 IsEmpty]: Start isEmpty. Operand has 53 states, 39 states have (on average 1.5128205128205128) internal successors, (59), 40 states have internal predecessors, (59), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-20 17:46:18,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-03-20 17:46:18,486 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:46:18,486 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:46:18,487 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:46:18,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:46:18,492 INFO L85 PathProgramCache]: Analyzing trace with hash -29354929, now seen corresponding path program 1 times [2022-03-20 17:46:18,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:46:18,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [246961866] [2022-03-20 17:46:18,508 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 17:46:18,508 INFO L85 PathProgramCache]: Analyzing trace with hash -29354929, now seen corresponding path program 2 times [2022-03-20 17:46:18,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:46:18,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969201315] [2022-03-20 17:46:18,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:46:18,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:46:18,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:18,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:46:18,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:18,702 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:46:18,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:46:18,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969201315] [2022-03-20 17:46:18,703 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969201315] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:46:18,703 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:46:18,703 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 17:46:18,706 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:46:18,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [246961866] [2022-03-20 17:46:18,707 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [246961866] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:46:18,707 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:46:18,707 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 17:46:18,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388462683] [2022-03-20 17:46:18,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:46:18,711 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-20 17:46:18,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:46:18,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-20 17:46:18,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 17:46:18,742 INFO L87 Difference]: Start difference. First operand has 53 states, 39 states have (on average 1.5128205128205128) internal successors, (59), 40 states have internal predecessors, (59), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:46:18,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:46:18,830 INFO L93 Difference]: Finished difference Result 98 states and 133 transitions. [2022-03-20 17:46:18,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-20 17:46:18,834 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2022-03-20 17:46:18,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:46:18,840 INFO L225 Difference]: With dead ends: 98 [2022-03-20 17:46:18,840 INFO L226 Difference]: Without dead ends: 46 [2022-03-20 17:46:18,843 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 17:46:18,847 INFO L913 BasicCegarLoop]: 62 mSDtfsCounter, 51 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 17:46:18,850 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 65 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 17:46:18,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-03-20 17:46:18,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2022-03-20 17:46:18,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 35 states have (on average 1.3142857142857143) internal successors, (46), 35 states have internal predecessors, (46), 6 states have call successors, (6), 6 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-20 17:46:18,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 56 transitions. [2022-03-20 17:46:18,896 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 56 transitions. Word has length 13 [2022-03-20 17:46:18,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:46:18,896 INFO L478 AbstractCegarLoop]: Abstraction has 46 states and 56 transitions. [2022-03-20 17:46:18,896 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:46:18,896 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 56 transitions. [2022-03-20 17:46:18,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-03-20 17:46:18,897 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:46:18,897 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:46:18,897 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-20 17:46:18,898 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:46:18,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:46:18,898 INFO L85 PathProgramCache]: Analyzing trace with hash -1128673794, now seen corresponding path program 1 times [2022-03-20 17:46:18,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:46:18,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2097136886] [2022-03-20 17:46:18,900 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 17:46:18,900 INFO L85 PathProgramCache]: Analyzing trace with hash -1128673794, now seen corresponding path program 2 times [2022-03-20 17:46:18,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:46:18,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452043156] [2022-03-20 17:46:18,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:46:18,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:46:18,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:18,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:46:18,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:18,997 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:46:18,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:46:18,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452043156] [2022-03-20 17:46:18,999 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452043156] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:46:19,000 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:46:19,000 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 17:46:19,000 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:46:19,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2097136886] [2022-03-20 17:46:19,001 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2097136886] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:46:19,001 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:46:19,001 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 17:46:19,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571110846] [2022-03-20 17:46:19,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:46:19,002 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 17:46:19,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:46:19,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 17:46:19,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 17:46:19,002 INFO L87 Difference]: Start difference. First operand 46 states and 56 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:46:19,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:46:19,192 INFO L93 Difference]: Finished difference Result 107 states and 138 transitions. [2022-03-20 17:46:19,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 17:46:19,193 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2022-03-20 17:46:19,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:46:19,195 INFO L225 Difference]: With dead ends: 107 [2022-03-20 17:46:19,195 INFO L226 Difference]: Without dead ends: 69 [2022-03-20 17:46:19,196 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-20 17:46:19,197 INFO L913 BasicCegarLoop]: 46 mSDtfsCounter, 94 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 17:46:19,197 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 53 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 17:46:19,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-03-20 17:46:19,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 48. [2022-03-20 17:46:19,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 37 states have (on average 1.2972972972972974) internal successors, (48), 37 states have internal predecessors, (48), 6 states have call successors, (6), 6 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-20 17:46:19,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 58 transitions. [2022-03-20 17:46:19,210 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 58 transitions. Word has length 13 [2022-03-20 17:46:19,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:46:19,210 INFO L478 AbstractCegarLoop]: Abstraction has 48 states and 58 transitions. [2022-03-20 17:46:19,210 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:46:19,210 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 58 transitions. [2022-03-20 17:46:19,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-20 17:46:19,212 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:46:19,212 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:46:19,213 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-20 17:46:19,213 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:46:19,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:46:19,213 INFO L85 PathProgramCache]: Analyzing trace with hash 556660632, now seen corresponding path program 1 times [2022-03-20 17:46:19,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:46:19,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1796126498] [2022-03-20 17:46:19,220 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:46:19,221 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:46:19,221 INFO L85 PathProgramCache]: Analyzing trace with hash 556660632, now seen corresponding path program 2 times [2022-03-20 17:46:19,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:46:19,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388743679] [2022-03-20 17:46:19,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:46:19,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:46:19,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:19,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:46:19,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:19,271 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-20 17:46:19,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:46:19,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388743679] [2022-03-20 17:46:19,271 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388743679] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:46:19,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065386479] [2022-03-20 17:46:19,272 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 17:46:19,272 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:46:19,272 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:46:19,275 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 17:46:19,303 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-20 17:46:19,404 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 17:46:19,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:46:19,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 3 conjunts are in the unsatisfiable core [2022-03-20 17:46:19,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:46:19,469 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-20 17:46:19,469 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:46:19,526 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-20 17:46:19,526 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1065386479] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:46:19,527 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:46:19,527 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-03-20 17:46:19,527 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:46:19,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1796126498] [2022-03-20 17:46:19,528 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1796126498] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:46:19,528 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:46:19,528 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 17:46:19,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888767685] [2022-03-20 17:46:19,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:46:19,529 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 17:46:19,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:46:19,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 17:46:19,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-03-20 17:46:19,530 INFO L87 Difference]: Start difference. First operand 48 states and 58 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:46:19,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:46:19,740 INFO L93 Difference]: Finished difference Result 131 states and 172 transitions. [2022-03-20 17:46:19,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 17:46:19,741 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2022-03-20 17:46:19,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:46:19,747 INFO L225 Difference]: With dead ends: 131 [2022-03-20 17:46:19,747 INFO L226 Difference]: Without dead ends: 92 [2022-03-20 17:46:19,749 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-03-20 17:46:19,753 INFO L913 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, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 17:46:19,755 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 58 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 17:46:19,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-03-20 17:46:19,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 71. [2022-03-20 17:46:19,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 57 states have (on average 1.3157894736842106) internal successors, (75), 57 states have internal predecessors, (75), 9 states have call successors, (9), 6 states have call predecessors, (9), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-20 17:46:19,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 91 transitions. [2022-03-20 17:46:19,777 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 91 transitions. Word has length 20 [2022-03-20 17:46:19,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:46:19,777 INFO L478 AbstractCegarLoop]: Abstraction has 71 states and 91 transitions. [2022-03-20 17:46:19,777 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:46:19,777 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 91 transitions. [2022-03-20 17:46:19,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-20 17:46:19,779 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:46:19,779 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:46:19,804 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-20 17:46:19,995 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:46:19,996 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:46:19,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:46:19,996 INFO L85 PathProgramCache]: Analyzing trace with hash -2023168326, now seen corresponding path program 3 times [2022-03-20 17:46:19,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:46:19,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [260637543] [2022-03-20 17:46:19,999 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:46:19,999 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:46:19,999 INFO L85 PathProgramCache]: Analyzing trace with hash -2023168326, now seen corresponding path program 4 times [2022-03-20 17:46:20,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:46:20,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350079301] [2022-03-20 17:46:20,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:46:20,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:46:20,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:20,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:46:20,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:20,115 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 17:46:20,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:46:20,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350079301] [2022-03-20 17:46:20,115 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350079301] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:46:20,115 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:46:20,116 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 17:46:20,116 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:46:20,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [260637543] [2022-03-20 17:46:20,116 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [260637543] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:46:20,116 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:46:20,116 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 17:46:20,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651253296] [2022-03-20 17:46:20,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:46:20,117 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 17:46:20,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:46:20,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 17:46:20,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-20 17:46:20,118 INFO L87 Difference]: Start difference. First operand 71 states and 91 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:46:20,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:46:20,322 INFO L93 Difference]: Finished difference Result 116 states and 156 transitions. [2022-03-20 17:46:20,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 17:46:20,322 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2022-03-20 17:46:20,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:46:20,327 INFO L225 Difference]: With dead ends: 116 [2022-03-20 17:46:20,327 INFO L226 Difference]: Without dead ends: 111 [2022-03-20 17:46:20,328 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-03-20 17:46:20,330 INFO L913 BasicCegarLoop]: 52 mSDtfsCounter, 89 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 17:46:20,331 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 69 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 175 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 17:46:20,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-03-20 17:46:20,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 72. [2022-03-20 17:46:20,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 58 states have (on average 1.3275862068965518) internal successors, (77), 58 states have internal predecessors, (77), 9 states have call successors, (9), 6 states have call predecessors, (9), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-20 17:46:20,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 93 transitions. [2022-03-20 17:46:20,354 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 93 transitions. Word has length 27 [2022-03-20 17:46:20,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:46:20,354 INFO L478 AbstractCegarLoop]: Abstraction has 72 states and 93 transitions. [2022-03-20 17:46:20,354 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:46:20,355 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 93 transitions. [2022-03-20 17:46:20,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-20 17:46:20,359 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:46:20,359 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:46:20,359 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-03-20 17:46:20,360 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:46:20,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:46:20,360 INFO L85 PathProgramCache]: Analyzing trace with hash -1646969817, now seen corresponding path program 1 times [2022-03-20 17:46:20,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:46:20,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [979807058] [2022-03-20 17:46:20,364 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:46:20,364 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:46:20,364 INFO L85 PathProgramCache]: Analyzing trace with hash -1646969817, now seen corresponding path program 2 times [2022-03-20 17:46:20,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:46:20,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700771682] [2022-03-20 17:46:20,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:46:20,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:46:20,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:20,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:46:20,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:20,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-03-20 17:46:20,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:20,494 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-03-20 17:46:20,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:46:20,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700771682] [2022-03-20 17:46:20,495 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700771682] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:46:20,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1804345539] [2022-03-20 17:46:20,495 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 17:46:20,496 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:46:20,496 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:46:20,500 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 17:46:20,510 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-20 17:46:20,595 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 17:46:20,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:46:20,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-20 17:46:20,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:46:20,673 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-03-20 17:46:20,673 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:46:20,746 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-03-20 17:46:20,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1804345539] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:46:20,747 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:46:20,747 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 11 [2022-03-20 17:46:20,747 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:46:20,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [979807058] [2022-03-20 17:46:20,748 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [979807058] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:46:20,748 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:46:20,748 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-20 17:46:20,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407629486] [2022-03-20 17:46:20,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:46:20,748 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-20 17:46:20,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:46:20,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-20 17:46:20,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-03-20 17:46:20,749 INFO L87 Difference]: Start difference. First operand 72 states and 93 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 17:46:21,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:46:21,004 INFO L93 Difference]: Finished difference Result 188 states and 258 transitions. [2022-03-20 17:46:21,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 17:46:21,005 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 36 [2022-03-20 17:46:21,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:46:21,007 INFO L225 Difference]: With dead ends: 188 [2022-03-20 17:46:21,007 INFO L226 Difference]: Without dead ends: 127 [2022-03-20 17:46:21,008 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=87, Invalid=153, Unknown=0, NotChecked=0, Total=240 [2022-03-20 17:46:21,008 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 228 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 17:46:21,009 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [232 Valid, 45 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 17:46:21,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-03-20 17:46:21,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 95. [2022-03-20 17:46:21,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 78 states have (on average 1.3333333333333333) internal successors, (104), 78 states have internal predecessors, (104), 12 states have call successors, (12), 6 states have call predecessors, (12), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-20 17:46:21,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 126 transitions. [2022-03-20 17:46:21,042 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 126 transitions. Word has length 36 [2022-03-20 17:46:21,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:46:21,042 INFO L478 AbstractCegarLoop]: Abstraction has 95 states and 126 transitions. [2022-03-20 17:46:21,042 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 17:46:21,042 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 126 transitions. [2022-03-20 17:46:21,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-03-20 17:46:21,050 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:46:21,050 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:46:21,079 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-20 17:46:21,259 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:46:21,260 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:46:21,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:46:21,260 INFO L85 PathProgramCache]: Analyzing trace with hash 1502656581, now seen corresponding path program 3 times [2022-03-20 17:46:21,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:46:21,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [297041783] [2022-03-20 17:46:21,263 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:46:21,263 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:46:21,263 INFO L85 PathProgramCache]: Analyzing trace with hash 1502656581, now seen corresponding path program 4 times [2022-03-20 17:46:21,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:46:21,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943368430] [2022-03-20 17:46:21,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:46:21,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:46:21,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:21,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:46:21,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:21,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-03-20 17:46:21,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:21,341 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-03-20 17:46:21,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:46:21,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943368430] [2022-03-20 17:46:21,341 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943368430] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:46:21,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432544080] [2022-03-20 17:46:21,342 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 17:46:21,342 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:46:21,342 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:46:21,344 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 17:46:21,345 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-20 17:46:21,466 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 17:46:21,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:46:21,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-20 17:46:21,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:46:21,538 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-03-20 17:46:21,538 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:46:21,635 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-03-20 17:46:21,635 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1432544080] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:46:21,635 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:46:21,636 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 13 [2022-03-20 17:46:21,636 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:46:21,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [297041783] [2022-03-20 17:46:21,636 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [297041783] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:46:21,636 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:46:21,636 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 17:46:21,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179453969] [2022-03-20 17:46:21,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:46:21,637 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 17:46:21,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:46:21,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 17:46:21,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2022-03-20 17:46:21,638 INFO L87 Difference]: Start difference. First operand 95 states and 126 transitions. Second operand has 8 states, 8 states have (on average 3.375) internal successors, (27), 6 states have internal predecessors, (27), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 17:46:22,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:46:22,001 INFO L93 Difference]: Finished difference Result 232 states and 323 transitions. [2022-03-20 17:46:22,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-20 17:46:22,002 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 6 states have internal predecessors, (27), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 43 [2022-03-20 17:46:22,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:46:22,004 INFO L225 Difference]: With dead ends: 232 [2022-03-20 17:46:22,004 INFO L226 Difference]: Without dead ends: 150 [2022-03-20 17:46:22,007 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=126, Invalid=216, Unknown=0, NotChecked=0, Total=342 [2022-03-20 17:46:22,009 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 221 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 320 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 400 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 17:46:22,009 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [225 Valid, 49 Invalid, 400 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 320 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 17:46:22,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2022-03-20 17:46:22,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 118. [2022-03-20 17:46:22,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 98 states have (on average 1.336734693877551) internal successors, (131), 98 states have internal predecessors, (131), 15 states have call successors, (15), 6 states have call predecessors, (15), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-03-20 17:46:22,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 159 transitions. [2022-03-20 17:46:22,043 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 159 transitions. Word has length 43 [2022-03-20 17:46:22,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:46:22,044 INFO L478 AbstractCegarLoop]: Abstraction has 118 states and 159 transitions. [2022-03-20 17:46:22,044 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 6 states have internal predecessors, (27), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 17:46:22,045 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 159 transitions. [2022-03-20 17:46:22,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-03-20 17:46:22,046 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:46:22,046 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:46:22,076 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-20 17:46:22,269 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:46:22,270 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:46:22,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:46:22,270 INFO L85 PathProgramCache]: Analyzing trace with hash 399846123, now seen corresponding path program 5 times [2022-03-20 17:46:22,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:46:22,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [792497807] [2022-03-20 17:46:22,272 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:46:22,272 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:46:22,273 INFO L85 PathProgramCache]: Analyzing trace with hash 399846123, now seen corresponding path program 6 times [2022-03-20 17:46:22,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:46:22,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598898610] [2022-03-20 17:46:22,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:46:22,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:46:22,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:22,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:46:22,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:22,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-03-20 17:46:22,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:22,360 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-03-20 17:46:22,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:46:22,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598898610] [2022-03-20 17:46:22,361 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598898610] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:46:22,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455233834] [2022-03-20 17:46:22,361 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 17:46:22,361 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:46:22,362 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:46:22,363 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 17:46:22,364 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-20 17:46:22,454 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 17:46:22,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:46:22,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-20 17:46:22,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:46:22,524 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-03-20 17:46:22,525 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:46:22,648 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-03-20 17:46:22,649 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1455233834] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:46:22,649 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:46:22,649 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 15 [2022-03-20 17:46:22,649 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:46:22,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [792497807] [2022-03-20 17:46:22,649 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [792497807] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:46:22,649 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:46:22,650 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 17:46:22,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393008778] [2022-03-20 17:46:22,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:46:22,650 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-20 17:46:22,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:46:22,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-20 17:46:22,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2022-03-20 17:46:22,651 INFO L87 Difference]: Start difference. First operand 118 states and 159 transitions. Second operand has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 7 states have internal predecessors, (29), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 17:46:23,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:46:23,009 INFO L93 Difference]: Finished difference Result 276 states and 388 transitions. [2022-03-20 17:46:23,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-20 17:46:23,009 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 7 states have internal predecessors, (29), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 50 [2022-03-20 17:46:23,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:46:23,011 INFO L225 Difference]: With dead ends: 276 [2022-03-20 17:46:23,011 INFO L226 Difference]: Without dead ends: 173 [2022-03-20 17:46:23,012 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=173, Invalid=289, Unknown=0, NotChecked=0, Total=462 [2022-03-20 17:46:23,012 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 359 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 363 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 399 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 17:46:23,012 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [363 Valid, 45 Invalid, 399 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 277 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 17:46:23,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2022-03-20 17:46:23,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 141. [2022-03-20 17:46:23,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 118 states have (on average 1.3389830508474576) internal successors, (158), 118 states have internal predecessors, (158), 18 states have call successors, (18), 6 states have call predecessors, (18), 4 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-03-20 17:46:23,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 192 transitions. [2022-03-20 17:46:23,032 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 192 transitions. Word has length 50 [2022-03-20 17:46:23,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:46:23,032 INFO L478 AbstractCegarLoop]: Abstraction has 141 states and 192 transitions. [2022-03-20 17:46:23,032 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 7 states have internal predecessors, (29), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 17:46:23,033 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 192 transitions. [2022-03-20 17:46:23,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-03-20 17:46:23,033 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:46:23,034 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:46:23,062 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-20 17:46:23,259 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:46:23,259 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:46:23,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:46:23,260 INFO L85 PathProgramCache]: Analyzing trace with hash -246769791, now seen corresponding path program 7 times [2022-03-20 17:46:23,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:46:23,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [676533004] [2022-03-20 17:46:23,262 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:46:23,262 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:46:23,262 INFO L85 PathProgramCache]: Analyzing trace with hash -246769791, now seen corresponding path program 8 times [2022-03-20 17:46:23,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:46:23,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232064588] [2022-03-20 17:46:23,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:46:23,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:46:23,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:23,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:46:23,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:23,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-03-20 17:46:23,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:23,347 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-03-20 17:46:23,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:46:23,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232064588] [2022-03-20 17:46:23,348 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232064588] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:46:23,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2007270508] [2022-03-20 17:46:23,348 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 17:46:23,348 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:46:23,348 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:46:23,350 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 17:46:23,362 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-20 17:46:23,451 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 17:46:23,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:46:23,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 17:46:23,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:46:23,540 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-03-20 17:46:23,541 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:46:23,679 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-03-20 17:46:23,679 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2007270508] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:46:23,679 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:46:23,679 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 17 [2022-03-20 17:46:23,680 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:46:23,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [676533004] [2022-03-20 17:46:23,680 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [676533004] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:46:23,680 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:46:23,680 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-20 17:46:23,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899535410] [2022-03-20 17:46:23,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:46:23,681 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 17:46:23,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:46:23,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 17:46:23,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=163, Unknown=0, NotChecked=0, Total=272 [2022-03-20 17:46:23,681 INFO L87 Difference]: Start difference. First operand 141 states and 192 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 8 states have internal predecessors, (31), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 17:46:24,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:46:24,094 INFO L93 Difference]: Finished difference Result 320 states and 453 transitions. [2022-03-20 17:46:24,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-20 17:46:24,094 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 8 states have internal predecessors, (31), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 57 [2022-03-20 17:46:24,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:46:24,096 INFO L225 Difference]: With dead ends: 320 [2022-03-20 17:46:24,096 INFO L226 Difference]: Without dead ends: 196 [2022-03-20 17:46:24,097 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=228, Invalid=372, Unknown=0, NotChecked=0, Total=600 [2022-03-20 17:46:24,097 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 375 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 350 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 379 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 491 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 350 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 17:46:24,098 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [379 Valid, 45 Invalid, 491 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 350 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 17:46:24,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2022-03-20 17:46:24,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 164. [2022-03-20 17:46:24,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 138 states have (on average 1.3405797101449275) internal successors, (185), 138 states have internal predecessors, (185), 21 states have call successors, (21), 6 states have call predecessors, (21), 4 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2022-03-20 17:46:24,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 225 transitions. [2022-03-20 17:46:24,121 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 225 transitions. Word has length 57 [2022-03-20 17:46:24,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:46:24,122 INFO L478 AbstractCegarLoop]: Abstraction has 164 states and 225 transitions. [2022-03-20 17:46:24,122 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 8 states have internal predecessors, (31), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 17:46:24,122 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 225 transitions. [2022-03-20 17:46:24,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-03-20 17:46:24,123 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:46:24,123 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:46:24,151 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-20 17:46:24,342 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:46:24,342 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:46:24,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:46:24,343 INFO L85 PathProgramCache]: Analyzing trace with hash -268874321, now seen corresponding path program 9 times [2022-03-20 17:46:24,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:46:24,343 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1264161187] [2022-03-20 17:46:24,345 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:46:24,345 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:46:24,345 INFO L85 PathProgramCache]: Analyzing trace with hash -268874321, now seen corresponding path program 10 times [2022-03-20 17:46:24,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:46:24,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396899705] [2022-03-20 17:46:24,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:46:24,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:46:24,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:24,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:46:24,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:24,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-03-20 17:46:24,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:24,457 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2022-03-20 17:46:24,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:46:24,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396899705] [2022-03-20 17:46:24,457 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396899705] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:46:24,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1497258843] [2022-03-20 17:46:24,458 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 17:46:24,458 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:46:24,458 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:46:24,459 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 17:46:24,460 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-20 17:46:24,559 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 17:46:24,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:46:24,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-20 17:46:24,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:46:24,662 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2022-03-20 17:46:24,662 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:46:24,852 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2022-03-20 17:46:24,852 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1497258843] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:46:24,852 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:46:24,853 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 19 [2022-03-20 17:46:24,853 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:46:24,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1264161187] [2022-03-20 17:46:24,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1264161187] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:46:24,853 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:46:24,853 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-20 17:46:24,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817712880] [2022-03-20 17:46:24,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:46:24,853 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-20 17:46:24,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:46:24,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-20 17:46:24,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=202, Unknown=0, NotChecked=0, Total=342 [2022-03-20 17:46:24,854 INFO L87 Difference]: Start difference. First operand 164 states and 225 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 9 states have internal predecessors, (33), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 17:46:25,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:46:25,358 INFO L93 Difference]: Finished difference Result 364 states and 518 transitions. [2022-03-20 17:46:25,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-20 17:46:25,359 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 9 states have internal predecessors, (33), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 64 [2022-03-20 17:46:25,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:46:25,360 INFO L225 Difference]: With dead ends: 364 [2022-03-20 17:46:25,360 INFO L226 Difference]: Without dead ends: 219 [2022-03-20 17:46:25,361 INFO L912 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 [2022-03-20 17:46:25,362 INFO L913 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 [2022-03-20 17:46:25,362 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [396 Valid, 49 Invalid, 611 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 466 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 17:46:25,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2022-03-20 17:46:25,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 187. [2022-03-20 17:46:25,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 158 states have (on average 1.3417721518987342) internal successors, (212), 158 states have internal predecessors, (212), 24 states have call successors, (24), 6 states have call predecessors, (24), 4 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-03-20 17:46:25,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 258 transitions. [2022-03-20 17:46:25,388 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 258 transitions. Word has length 64 [2022-03-20 17:46:25,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:46:25,388 INFO L478 AbstractCegarLoop]: Abstraction has 187 states and 258 transitions. [2022-03-20 17:46:25,388 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 9 states have internal predecessors, (33), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 17:46:25,389 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 258 transitions. [2022-03-20 17:46:25,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-03-20 17:46:25,389 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:46:25,390 INFO L499 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:46:25,414 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-20 17:46:25,599 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:46:25,600 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:46:25,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:46:25,600 INFO L85 PathProgramCache]: Analyzing trace with hash -150953283, now seen corresponding path program 11 times [2022-03-20 17:46:25,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:46:25,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [33508019] [2022-03-20 17:46:25,602 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:46:25,602 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:46:25,602 INFO L85 PathProgramCache]: Analyzing trace with hash -150953283, now seen corresponding path program 12 times [2022-03-20 17:46:25,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:46:25,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506702726] [2022-03-20 17:46:25,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:46:25,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:46:25,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:25,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:46:25,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:25,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-03-20 17:46:25,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:25,722 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2022-03-20 17:46:25,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:46:25,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506702726] [2022-03-20 17:46:25,722 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506702726] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:46:25,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011300164] [2022-03-20 17:46:25,722 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 17:46:25,722 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:46:25,722 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:46:25,724 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 17:46:25,725 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-20 17:46:25,820 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 17:46:25,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:46:25,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 17:46:25,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:46:26,000 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 25 proven. 1 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2022-03-20 17:46:26,001 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:46:26,239 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 25 proven. 1 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2022-03-20 17:46:26,239 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2011300164] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:46:26,239 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:46:26,240 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 7, 7] total 20 [2022-03-20 17:46:26,241 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:46:26,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [33508019] [2022-03-20 17:46:26,242 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [33508019] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:46:26,242 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:46:26,242 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-20 17:46:26,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892477594] [2022-03-20 17:46:26,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:46:26,242 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-20 17:46:26,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:46:26,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-20 17:46:26,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2022-03-20 17:46:26,243 INFO L87 Difference]: Start difference. First operand 187 states and 258 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 10 states have internal predecessors, (35), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 17:46:26,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:46:26,823 INFO L93 Difference]: Finished difference Result 408 states and 583 transitions. [2022-03-20 17:46:26,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-20 17:46:26,824 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 10 states have internal predecessors, (35), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 71 [2022-03-20 17:46:26,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:46:26,825 INFO L225 Difference]: With dead ends: 408 [2022-03-20 17:46:26,825 INFO L226 Difference]: Without dead ends: 242 [2022-03-20 17:46:26,826 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 137 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=187, Invalid=683, Unknown=0, NotChecked=0, Total=870 [2022-03-20 17:46:26,827 INFO L913 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 [2022-03-20 17:46:26,827 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [558 Valid, 49 Invalid, 635 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [184 Valid, 451 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 17:46:26,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2022-03-20 17:46:26,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 210. [2022-03-20 17:46:26,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 178 states have (on average 1.3426966292134832) internal successors, (239), 178 states have internal predecessors, (239), 27 states have call successors, (27), 6 states have call predecessors, (27), 4 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2022-03-20 17:46:26,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 291 transitions. [2022-03-20 17:46:26,856 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 291 transitions. Word has length 71 [2022-03-20 17:46:26,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:46:26,856 INFO L478 AbstractCegarLoop]: Abstraction has 210 states and 291 transitions. [2022-03-20 17:46:26,856 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 10 states have internal predecessors, (35), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 17:46:26,856 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 291 transitions. [2022-03-20 17:46:26,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-03-20 17:46:26,857 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:46:26,857 INFO L499 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:46:26,881 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-20 17:46:27,071 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:46:27,072 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:46:27,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:46:27,072 INFO L85 PathProgramCache]: Analyzing trace with hash -1180638093, now seen corresponding path program 13 times [2022-03-20 17:46:27,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:46:27,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2010695418] [2022-03-20 17:46:27,073 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:46:27,073 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:46:27,073 INFO L85 PathProgramCache]: Analyzing trace with hash -1180638093, now seen corresponding path program 14 times [2022-03-20 17:46:27,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:46:27,074 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980606638] [2022-03-20 17:46:27,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:46:27,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:46:27,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:27,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:46:27,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:27,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-03-20 17:46:27,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:27,193 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2022-03-20 17:46:27,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:46:27,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980606638] [2022-03-20 17:46:27,193 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980606638] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:46:27,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936639236] [2022-03-20 17:46:27,193 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 17:46:27,193 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:46:27,194 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:46:27,195 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 17:46:27,220 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-20 17:46:27,309 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 17:46:27,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:46:27,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-20 17:46:27,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:46:27,419 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2022-03-20 17:46:27,420 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:46:27,632 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2022-03-20 17:46:27,632 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1936639236] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:46:27,632 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:46:27,632 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 11] total 23 [2022-03-20 17:46:27,633 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:46:27,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2010695418] [2022-03-20 17:46:27,633 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2010695418] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:46:27,633 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:46:27,633 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-20 17:46:27,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114882749] [2022-03-20 17:46:27,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:46:27,633 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-20 17:46:27,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:46:27,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-20 17:46:27,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=292, Unknown=0, NotChecked=0, Total=506 [2022-03-20 17:46:27,634 INFO L87 Difference]: Start difference. First operand 210 states and 291 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 11 states have internal predecessors, (37), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 17:46:28,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:46:28,183 INFO L93 Difference]: Finished difference Result 452 states and 648 transitions. [2022-03-20 17:46:28,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-20 17:46:28,184 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 11 states have internal predecessors, (37), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 78 [2022-03-20 17:46:28,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:46:28,186 INFO L225 Difference]: With dead ends: 452 [2022-03-20 17:46:28,186 INFO L226 Difference]: Without dead ends: 265 [2022-03-20 17:46:28,187 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=441, Invalid=681, Unknown=0, NotChecked=0, Total=1122 [2022-03-20 17:46:28,187 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 515 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 543 mSolverCounterSat, 182 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 519 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 725 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 182 IncrementalHoareTripleChecker+Valid, 543 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 17:46:28,187 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [519 Valid, 51 Invalid, 725 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [182 Valid, 543 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 17:46:28,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2022-03-20 17:46:28,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 233. [2022-03-20 17:46:28,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 198 states have (on average 1.3434343434343434) internal successors, (266), 198 states have internal predecessors, (266), 30 states have call successors, (30), 6 states have call predecessors, (30), 4 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2022-03-20 17:46:28,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 324 transitions. [2022-03-20 17:46:28,219 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 324 transitions. Word has length 78 [2022-03-20 17:46:28,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:46:28,219 INFO L478 AbstractCegarLoop]: Abstraction has 233 states and 324 transitions. [2022-03-20 17:46:28,220 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 11 states have internal predecessors, (37), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 17:46:28,220 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 324 transitions. [2022-03-20 17:46:28,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-03-20 17:46:28,221 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:46:28,221 INFO L499 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:46:28,245 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-20 17:46:28,439 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-03-20 17:46:28,440 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:46:28,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:46:28,440 INFO L85 PathProgramCache]: Analyzing trace with hash -1953261063, now seen corresponding path program 15 times [2022-03-20 17:46:28,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:46:28,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [647448982] [2022-03-20 17:46:28,441 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:46:28,441 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:46:28,441 INFO L85 PathProgramCache]: Analyzing trace with hash -1953261063, now seen corresponding path program 16 times [2022-03-20 17:46:28,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:46:28,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312312969] [2022-03-20 17:46:28,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:46:28,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:46:28,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:28,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:46:28,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:28,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-03-20 17:46:28,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:28,584 INFO L134 CoverageAnalysis]: Checked inductivity of 279 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2022-03-20 17:46:28,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:46:28,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312312969] [2022-03-20 17:46:28,585 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312312969] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:46:28,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2111032117] [2022-03-20 17:46:28,585 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 17:46:28,585 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:46:28,585 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:46:28,588 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 17:46:28,589 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-20 17:46:28,693 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 17:46:28,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:46:28,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-20 17:46:28,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:46:28,792 INFO L134 CoverageAnalysis]: Checked inductivity of 279 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2022-03-20 17:46:28,792 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:46:29,036 INFO L134 CoverageAnalysis]: Checked inductivity of 279 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2022-03-20 17:46:29,036 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2111032117] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:46:29,036 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:46:29,036 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 25 [2022-03-20 17:46:29,036 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:46:29,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [647448982] [2022-03-20 17:46:29,037 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [647448982] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:46:29,037 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:46:29,037 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-20 17:46:29,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602603585] [2022-03-20 17:46:29,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:46:29,037 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-20 17:46:29,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:46:29,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-20 17:46:29,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=343, Unknown=0, NotChecked=0, Total=600 [2022-03-20 17:46:29,038 INFO L87 Difference]: Start difference. First operand 233 states and 324 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 12 states have internal predecessors, (39), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 17:46:29,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:46:29,754 INFO L93 Difference]: Finished difference Result 496 states and 713 transitions. [2022-03-20 17:46:29,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-20 17:46:29,755 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 12 states have internal predecessors, (39), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 85 [2022-03-20 17:46:29,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:46:29,756 INFO L225 Difference]: With dead ends: 496 [2022-03-20 17:46:29,756 INFO L226 Difference]: Without dead ends: 288 [2022-03-20 17:46:29,757 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=528, Invalid=804, Unknown=0, NotChecked=0, Total=1332 [2022-03-20 17:46:29,758 INFO L913 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, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 17:46:29,758 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [448 Valid, 59 Invalid, 1015 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [166 Valid, 849 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 17:46:29,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2022-03-20 17:46:29,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 256. [2022-03-20 17:46:29,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 218 states have (on average 1.3440366972477065) internal successors, (293), 218 states have internal predecessors, (293), 33 states have call successors, (33), 6 states have call predecessors, (33), 4 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2022-03-20 17:46:29,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 357 transitions. [2022-03-20 17:46:29,795 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 357 transitions. Word has length 85 [2022-03-20 17:46:29,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:46:29,796 INFO L478 AbstractCegarLoop]: Abstraction has 256 states and 357 transitions. [2022-03-20 17:46:29,796 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 12 states have internal predecessors, (39), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 17:46:29,796 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 357 transitions. [2022-03-20 17:46:29,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-03-20 17:46:29,797 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:46:29,797 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:46:29,818 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-03-20 17:46:30,011 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:46:30,011 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:46:30,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:46:30,012 INFO L85 PathProgramCache]: Analyzing trace with hash 1219178295, now seen corresponding path program 17 times [2022-03-20 17:46:30,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:46:30,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1788068917] [2022-03-20 17:46:30,013 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:46:30,013 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:46:30,013 INFO L85 PathProgramCache]: Analyzing trace with hash 1219178295, now seen corresponding path program 18 times [2022-03-20 17:46:30,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:46:30,014 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151098058] [2022-03-20 17:46:30,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:46:30,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:46:30,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:30,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:46:30,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:30,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2022-03-20 17:46:30,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:30,163 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2022-03-20 17:46:30,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:46:30,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151098058] [2022-03-20 17:46:30,163 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151098058] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:46:30,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005085628] [2022-03-20 17:46:30,164 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 17:46:30,164 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:46:30,164 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:46:30,165 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 17:46:30,173 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-20 17:46:30,280 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 17:46:30,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:46:30,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 17:46:30,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:46:30,458 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 37 proven. 1 refuted. 0 times theorem prover too weak. 307 trivial. 0 not checked. [2022-03-20 17:46:30,458 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:46:30,741 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 37 proven. 1 refuted. 0 times theorem prover too weak. 307 trivial. 0 not checked. [2022-03-20 17:46:30,742 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2005085628] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:46:30,742 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:46:30,742 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 7, 7] total 23 [2022-03-20 17:46:30,742 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:46:30,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1788068917] [2022-03-20 17:46:30,742 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1788068917] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:46:30,742 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:46:30,742 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-20 17:46:30,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194788299] [2022-03-20 17:46:30,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:46:30,743 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-20 17:46:30,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:46:30,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-20 17:46:30,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=399, Unknown=0, NotChecked=0, Total=506 [2022-03-20 17:46:30,744 INFO L87 Difference]: Start difference. First operand 256 states and 357 transitions. Second operand has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 13 states have internal predecessors, (41), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 17:46:31,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:46:31,473 INFO L93 Difference]: Finished difference Result 540 states and 778 transitions. [2022-03-20 17:46:31,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-20 17:46:31,474 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 13 states have internal predecessors, (41), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 92 [2022-03-20 17:46:31,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:46:31,475 INFO L225 Difference]: With dead ends: 540 [2022-03-20 17:46:31,476 INFO L226 Difference]: Without dead ends: 311 [2022-03-20 17:46:31,477 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 179 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=292, Invalid=968, Unknown=0, NotChecked=0, Total=1260 [2022-03-20 17:46:31,478 INFO L913 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 [2022-03-20 17:46:31,478 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [623 Valid, 47 Invalid, 878 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [245 Valid, 633 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 17:46:31,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2022-03-20 17:46:31,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 279. [2022-03-20 17:46:31,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 238 states have (on average 1.3445378151260505) internal successors, (320), 238 states have internal predecessors, (320), 36 states have call successors, (36), 6 states have call predecessors, (36), 4 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2022-03-20 17:46:31,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 390 transitions. [2022-03-20 17:46:31,530 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 390 transitions. Word has length 92 [2022-03-20 17:46:31,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:46:31,530 INFO L478 AbstractCegarLoop]: Abstraction has 279 states and 390 transitions. [2022-03-20 17:46:31,530 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 13 states have internal predecessors, (41), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 17:46:31,530 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 390 transitions. [2022-03-20 17:46:31,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-03-20 17:46:31,532 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:46:31,532 INFO L499 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:46:31,552 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-20 17:46:31,743 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-03-20 17:46:31,743 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:46:31,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:46:31,744 INFO L85 PathProgramCache]: Analyzing trace with hash -1117504203, now seen corresponding path program 19 times [2022-03-20 17:46:31,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:46:31,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1572685729] [2022-03-20 17:46:31,745 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:46:31,745 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:46:31,746 INFO L85 PathProgramCache]: Analyzing trace with hash -1117504203, now seen corresponding path program 20 times [2022-03-20 17:46:31,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:46:31,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632359323] [2022-03-20 17:46:31,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:46:31,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:46:31,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:31,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:46:31,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:31,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-03-20 17:46:31,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:31,903 INFO L134 CoverageAnalysis]: Checked inductivity of 418 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 297 trivial. 0 not checked. [2022-03-20 17:46:31,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:46:31,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632359323] [2022-03-20 17:46:31,903 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632359323] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:46:31,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2057397005] [2022-03-20 17:46:31,904 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 17:46:31,904 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:46:31,904 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:46:31,906 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 17:46:31,907 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-20 17:46:32,031 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 17:46:32,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:46:32,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-20 17:46:32,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:46:32,192 INFO L134 CoverageAnalysis]: Checked inductivity of 418 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 297 trivial. 0 not checked. [2022-03-20 17:46:32,192 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:46:32,563 INFO L134 CoverageAnalysis]: Checked inductivity of 418 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 297 trivial. 0 not checked. [2022-03-20 17:46:32,563 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2057397005] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:46:32,563 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:46:32,564 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 29 [2022-03-20 17:46:32,565 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:46:32,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1572685729] [2022-03-20 17:46:32,565 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1572685729] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:46:32,565 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:46:32,565 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-20 17:46:32,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861751741] [2022-03-20 17:46:32,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:46:32,565 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-20 17:46:32,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:46:32,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-20 17:46:32,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=355, Invalid=457, Unknown=0, NotChecked=0, Total=812 [2022-03-20 17:46:32,566 INFO L87 Difference]: Start difference. First operand 279 states and 390 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 14 states have internal predecessors, (43), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 17:46:33,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:46:33,242 INFO L93 Difference]: Finished difference Result 584 states and 843 transitions. [2022-03-20 17:46:33,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-20 17:46:33,242 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 14 states have internal predecessors, (43), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 99 [2022-03-20 17:46:33,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:46:33,244 INFO L225 Difference]: With dead ends: 584 [2022-03-20 17:46:33,244 INFO L226 Difference]: Without dead ends: 334 [2022-03-20 17:46:33,246 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=726, Invalid=1080, Unknown=0, NotChecked=0, Total=1806 [2022-03-20 17:46:33,246 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 801 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 643 mSolverCounterSat, 282 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 805 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 925 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 282 IncrementalHoareTripleChecker+Valid, 643 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 17:46:33,246 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [805 Valid, 49 Invalid, 925 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [282 Valid, 643 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 17:46:33,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2022-03-20 17:46:33,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 302. [2022-03-20 17:46:33,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 258 states have (on average 1.3449612403100775) internal successors, (347), 258 states have internal predecessors, (347), 39 states have call successors, (39), 6 states have call predecessors, (39), 4 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) [2022-03-20 17:46:33,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 423 transitions. [2022-03-20 17:46:33,294 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 423 transitions. Word has length 99 [2022-03-20 17:46:33,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:46:33,294 INFO L478 AbstractCegarLoop]: Abstraction has 302 states and 423 transitions. [2022-03-20 17:46:33,294 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 14 states have internal predecessors, (43), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 17:46:33,294 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 423 transitions. [2022-03-20 17:46:33,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-03-20 17:46:33,295 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:46:33,295 INFO L499 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:46:33,321 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-20 17:46:33,518 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-03-20 17:46:33,519 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:46:33,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:46:33,519 INFO L85 PathProgramCache]: Analyzing trace with hash 1433890299, now seen corresponding path program 21 times [2022-03-20 17:46:33,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:46:33,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1189620570] [2022-03-20 17:46:33,521 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:46:33,521 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:46:33,521 INFO L85 PathProgramCache]: Analyzing trace with hash 1433890299, now seen corresponding path program 22 times [2022-03-20 17:46:33,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:46:33,522 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653720737] [2022-03-20 17:46:33,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:46:33,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:46:33,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:33,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:46:33,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:33,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-03-20 17:46:33,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:33,702 INFO L134 CoverageAnalysis]: Checked inductivity of 498 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 354 trivial. 0 not checked. [2022-03-20 17:46:33,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:46:33,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653720737] [2022-03-20 17:46:33,702 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653720737] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:46:33,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1337887177] [2022-03-20 17:46:33,702 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 17:46:33,703 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:46:33,703 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:46:33,704 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 17:46:33,705 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-20 17:46:33,833 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 17:46:33,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:46:33,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 422 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-20 17:46:33,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:46:33,971 INFO L134 CoverageAnalysis]: Checked inductivity of 498 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 354 trivial. 0 not checked. [2022-03-20 17:46:33,971 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:46:34,336 INFO L134 CoverageAnalysis]: Checked inductivity of 498 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 354 trivial. 0 not checked. [2022-03-20 17:46:34,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1337887177] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:46:34,336 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:46:34,336 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15, 15] total 31 [2022-03-20 17:46:34,336 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:46:34,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1189620570] [2022-03-20 17:46:34,337 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1189620570] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:46:34,337 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:46:34,337 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-03-20 17:46:34,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967572330] [2022-03-20 17:46:34,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:46:34,337 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-20 17:46:34,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:46:34,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-20 17:46:34,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=410, Invalid=520, Unknown=0, NotChecked=0, Total=930 [2022-03-20 17:46:34,338 INFO L87 Difference]: Start difference. First operand 302 states and 423 transitions. Second operand has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 15 states have internal predecessors, (45), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 17:46:35,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:46:35,168 INFO L93 Difference]: Finished difference Result 628 states and 908 transitions. [2022-03-20 17:46:35,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-20 17:46:35,169 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 15 states have internal predecessors, (45), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 106 [2022-03-20 17:46:35,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:46:35,170 INFO L225 Difference]: With dead ends: 628 [2022-03-20 17:46:35,171 INFO L226 Difference]: Without dead ends: 357 [2022-03-20 17:46:35,172 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=837, Invalid=1233, Unknown=0, NotChecked=0, Total=2070 [2022-03-20 17:46:35,172 INFO L913 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 [2022-03-20 17:46:35,172 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [648 Valid, 49 Invalid, 1141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [276 Valid, 865 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-20 17:46:35,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2022-03-20 17:46:35,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 325. [2022-03-20 17:46:35,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 278 states have (on average 1.3453237410071943) internal successors, (374), 278 states have internal predecessors, (374), 42 states have call successors, (42), 6 states have call predecessors, (42), 4 states have return successors, (40), 40 states have call predecessors, (40), 40 states have call successors, (40) [2022-03-20 17:46:35,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 456 transitions. [2022-03-20 17:46:35,227 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 456 transitions. Word has length 106 [2022-03-20 17:46:35,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:46:35,227 INFO L478 AbstractCegarLoop]: Abstraction has 325 states and 456 transitions. [2022-03-20 17:46:35,228 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 15 states have internal predecessors, (45), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 17:46:35,228 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 456 transitions. [2022-03-20 17:46:35,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-03-20 17:46:35,229 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:46:35,229 INFO L499 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:46:35,252 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-03-20 17:46:35,443 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-03-20 17:46:35,443 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:46:35,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:46:35,444 INFO L85 PathProgramCache]: Analyzing trace with hash -464302991, now seen corresponding path program 23 times [2022-03-20 17:46:35,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:46:35,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1207112593] [2022-03-20 17:46:35,445 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:46:35,445 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:46:35,445 INFO L85 PathProgramCache]: Analyzing trace with hash -464302991, now seen corresponding path program 24 times [2022-03-20 17:46:35,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:46:35,446 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119741899] [2022-03-20 17:46:35,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:46:35,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:46:35,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:35,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:46:35,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:35,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-03-20 17:46:35,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:35,617 INFO L134 CoverageAnalysis]: Checked inductivity of 585 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 416 trivial. 0 not checked. [2022-03-20 17:46:35,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:46:35,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119741899] [2022-03-20 17:46:35,618 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119741899] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:46:35,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144198242] [2022-03-20 17:46:35,618 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 17:46:35,618 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:46:35,618 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:46:35,619 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 17:46:35,621 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-20 17:46:35,745 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 17:46:35,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:46:35,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 17:46:35,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:46:35,981 INFO L134 CoverageAnalysis]: Checked inductivity of 585 backedges. 49 proven. 1 refuted. 0 times theorem prover too weak. 535 trivial. 0 not checked. [2022-03-20 17:46:35,982 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:46:36,231 INFO L134 CoverageAnalysis]: Checked inductivity of 585 backedges. 49 proven. 1 refuted. 0 times theorem prover too weak. 535 trivial. 0 not checked. [2022-03-20 17:46:36,231 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2144198242] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:46:36,231 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:46:36,231 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 7, 7] total 26 [2022-03-20 17:46:36,232 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:46:36,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1207112593] [2022-03-20 17:46:36,232 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1207112593] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:46:36,232 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:46:36,232 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-03-20 17:46:36,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124229950] [2022-03-20 17:46:36,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:46:36,232 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-20 17:46:36,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:46:36,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-20 17:46:36,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=501, Unknown=0, NotChecked=0, Total=650 [2022-03-20 17:46:36,233 INFO L87 Difference]: Start difference. First operand 325 states and 456 transitions. Second operand has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 16 states have internal predecessors, (47), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 17:46:37,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:46:37,202 INFO L93 Difference]: Finished difference Result 672 states and 973 transitions. [2022-03-20 17:46:37,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-20 17:46:37,202 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 16 states have internal predecessors, (47), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 113 [2022-03-20 17:46:37,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:46:37,205 INFO L225 Difference]: With dead ends: 672 [2022-03-20 17:46:37,205 INFO L226 Difference]: Without dead ends: 380 [2022-03-20 17:46:37,206 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 221 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=424, Invalid=1298, Unknown=0, NotChecked=0, Total=1722 [2022-03-20 17:46:37,206 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 727 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 834 mSolverCounterSat, 288 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 731 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 1122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 288 IncrementalHoareTripleChecker+Valid, 834 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-20 17:46:37,207 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [731 Valid, 51 Invalid, 1122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [288 Valid, 834 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-20 17:46:37,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2022-03-20 17:46:37,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 348. [2022-03-20 17:46:37,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 298 states have (on average 1.3456375838926173) internal successors, (401), 298 states have internal predecessors, (401), 45 states have call successors, (45), 6 states have call predecessors, (45), 4 states have return successors, (43), 43 states have call predecessors, (43), 43 states have call successors, (43) [2022-03-20 17:46:37,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 489 transitions. [2022-03-20 17:46:37,268 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 489 transitions. Word has length 113 [2022-03-20 17:46:37,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:46:37,268 INFO L478 AbstractCegarLoop]: Abstraction has 348 states and 489 transitions. [2022-03-20 17:46:37,268 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 16 states have internal predecessors, (47), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 17:46:37,268 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 489 transitions. [2022-03-20 17:46:37,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-03-20 17:46:37,270 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:46:37,270 INFO L499 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:46:37,287 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-20 17:46:37,471 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-03-20 17:46:37,471 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:46:37,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:46:37,472 INFO L85 PathProgramCache]: Analyzing trace with hash 551870655, now seen corresponding path program 25 times [2022-03-20 17:46:37,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:46:37,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [989965377] [2022-03-20 17:46:37,473 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:46:37,473 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:46:37,473 INFO L85 PathProgramCache]: Analyzing trace with hash 551870655, now seen corresponding path program 26 times [2022-03-20 17:46:37,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:46:37,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458324841] [2022-03-20 17:46:37,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:46:37,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:46:37,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:37,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:46:37,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:37,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2022-03-20 17:46:37,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:37,669 INFO L134 CoverageAnalysis]: Checked inductivity of 679 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 483 trivial. 0 not checked. [2022-03-20 17:46:37,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:46:37,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458324841] [2022-03-20 17:46:37,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458324841] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:46:37,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942041637] [2022-03-20 17:46:37,670 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 17:46:37,670 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:46:37,670 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:46:37,671 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 17:46:37,672 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-20 17:46:37,795 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 17:46:37,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:46:37,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 474 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-20 17:46:37,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:46:37,980 INFO L134 CoverageAnalysis]: Checked inductivity of 679 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 483 trivial. 0 not checked. [2022-03-20 17:46:37,980 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:46:38,403 INFO L134 CoverageAnalysis]: Checked inductivity of 679 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 483 trivial. 0 not checked. [2022-03-20 17:46:38,404 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [942041637] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:46:38,404 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:46:38,404 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 17] total 35 [2022-03-20 17:46:38,404 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:46:38,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [989965377] [2022-03-20 17:46:38,404 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [989965377] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:46:38,404 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:46:38,404 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-03-20 17:46:38,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434815098] [2022-03-20 17:46:38,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:46:38,405 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-20 17:46:38,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:46:38,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-20 17:46:38,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=532, Invalid=658, Unknown=0, NotChecked=0, Total=1190 [2022-03-20 17:46:38,406 INFO L87 Difference]: Start difference. First operand 348 states and 489 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 17 states have internal predecessors, (49), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 17:46:39,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:46:39,333 INFO L93 Difference]: Finished difference Result 716 states and 1038 transitions. [2022-03-20 17:46:39,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-20 17:46:39,334 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 17 states have internal predecessors, (49), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 120 [2022-03-20 17:46:39,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:46:39,336 INFO L225 Difference]: With dead ends: 716 [2022-03-20 17:46:39,337 INFO L226 Difference]: Without dead ends: 403 [2022-03-20 17:46:39,338 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1083, Invalid=1569, Unknown=0, NotChecked=0, Total=2652 [2022-03-20 17:46:39,339 INFO L913 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, 0.7s IncrementalHoareTripleChecker+Time [2022-03-20 17:46:39,339 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [944 Valid, 45 Invalid, 1282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [415 Valid, 867 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-20 17:46:39,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2022-03-20 17:46:39,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 371. [2022-03-20 17:46:39,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 371 states, 318 states have (on average 1.3459119496855345) internal successors, (428), 318 states have internal predecessors, (428), 48 states have call successors, (48), 6 states have call predecessors, (48), 4 states have return successors, (46), 46 states have call predecessors, (46), 46 states have call successors, (46) [2022-03-20 17:46:39,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 522 transitions. [2022-03-20 17:46:39,420 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 522 transitions. Word has length 120 [2022-03-20 17:46:39,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:46:39,420 INFO L478 AbstractCegarLoop]: Abstraction has 371 states and 522 transitions. [2022-03-20 17:46:39,420 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 17 states have internal predecessors, (49), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 17:46:39,421 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 522 transitions. [2022-03-20 17:46:39,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-03-20 17:46:39,422 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:46:39,422 INFO L499 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:46:39,442 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-03-20 17:46:39,629 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:46:39,630 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:46:39,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:46:39,630 INFO L85 PathProgramCache]: Analyzing trace with hash -37648467, now seen corresponding path program 27 times [2022-03-20 17:46:39,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:46:39,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2060124836] [2022-03-20 17:46:39,631 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:46:39,632 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:46:39,632 INFO L85 PathProgramCache]: Analyzing trace with hash -37648467, now seen corresponding path program 28 times [2022-03-20 17:46:39,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:46:39,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539684605] [2022-03-20 17:46:39,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:46:39,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:46:39,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:39,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:46:39,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:39,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2022-03-20 17:46:39,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:39,828 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 555 trivial. 0 not checked. [2022-03-20 17:46:39,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:46:39,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539684605] [2022-03-20 17:46:39,828 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539684605] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:46:39,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [642567536] [2022-03-20 17:46:39,829 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 17:46:39,830 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:46:39,830 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:46:39,831 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 17:46:39,860 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-20 17:46:39,987 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 17:46:39,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:46:39,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 500 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-20 17:46:39,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:46:40,142 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 555 trivial. 0 not checked. [2022-03-20 17:46:40,142 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:46:40,603 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 555 trivial. 0 not checked. [2022-03-20 17:46:40,604 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [642567536] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:46:40,604 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:46:40,604 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18, 18] total 37 [2022-03-20 17:46:40,604 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:46:40,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2060124836] [2022-03-20 17:46:40,604 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2060124836] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:46:40,604 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:46:40,604 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-03-20 17:46:40,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602069135] [2022-03-20 17:46:40,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:46:40,605 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-20 17:46:40,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:46:40,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-20 17:46:40,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=599, Invalid=733, Unknown=0, NotChecked=0, Total=1332 [2022-03-20 17:46:40,606 INFO L87 Difference]: Start difference. First operand 371 states and 522 transitions. Second operand has 20 states, 20 states have (on average 2.55) internal successors, (51), 18 states have internal predecessors, (51), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 17:46:41,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:46:41,585 INFO L93 Difference]: Finished difference Result 760 states and 1103 transitions. [2022-03-20 17:46:41,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-20 17:46:41,586 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.55) internal successors, (51), 18 states have internal predecessors, (51), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 127 [2022-03-20 17:46:41,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:46:41,588 INFO L225 Difference]: With dead ends: 760 [2022-03-20 17:46:41,588 INFO L226 Difference]: Without dead ends: 426 [2022-03-20 17:46:41,590 INFO L912 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 [2022-03-20 17:46:41,590 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 905 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 902 mSolverCounterSat, 376 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 909 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 1278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 376 IncrementalHoareTripleChecker+Valid, 902 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-20 17:46:41,590 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [909 Valid, 49 Invalid, 1278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [376 Valid, 902 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-20 17:46:41,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2022-03-20 17:46:41,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 394. [2022-03-20 17:46:41,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 394 states, 338 states have (on average 1.3461538461538463) internal successors, (455), 338 states have internal predecessors, (455), 51 states have call successors, (51), 6 states have call predecessors, (51), 4 states have return successors, (49), 49 states have call predecessors, (49), 49 states have call successors, (49) [2022-03-20 17:46:41,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 555 transitions. [2022-03-20 17:46:41,648 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 555 transitions. Word has length 127 [2022-03-20 17:46:41,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:46:41,648 INFO L478 AbstractCegarLoop]: Abstraction has 394 states and 555 transitions. [2022-03-20 17:46:41,649 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.55) internal successors, (51), 18 states have internal predecessors, (51), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 17:46:41,649 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 555 transitions. [2022-03-20 17:46:41,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-03-20 17:46:41,650 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:46:41,650 INFO L499 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:46:41,667 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-03-20 17:46:41,850 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-03-20 17:46:41,851 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:46:41,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:46:41,851 INFO L85 PathProgramCache]: Analyzing trace with hash 408078211, now seen corresponding path program 29 times [2022-03-20 17:46:41,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:46:41,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2075166662] [2022-03-20 17:46:41,852 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:46:41,852 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:46:41,853 INFO L85 PathProgramCache]: Analyzing trace with hash 408078211, now seen corresponding path program 30 times [2022-03-20 17:46:41,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:46:41,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206619028] [2022-03-20 17:46:41,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:46:41,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:46:41,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:42,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:46:42,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:42,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2022-03-20 17:46:42,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:42,059 INFO L134 CoverageAnalysis]: Checked inductivity of 888 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 632 trivial. 0 not checked. [2022-03-20 17:46:42,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:46:42,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206619028] [2022-03-20 17:46:42,060 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206619028] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:46:42,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234502500] [2022-03-20 17:46:42,060 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 17:46:42,060 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:46:42,061 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:46:42,064 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 17:46:42,091 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-20 17:46:42,233 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 17:46:42,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:46:42,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 17:46:42,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:46:42,460 INFO L134 CoverageAnalysis]: Checked inductivity of 888 backedges. 61 proven. 1 refuted. 0 times theorem prover too weak. 826 trivial. 0 not checked. [2022-03-20 17:46:42,461 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:46:42,721 INFO L134 CoverageAnalysis]: Checked inductivity of 888 backedges. 61 proven. 1 refuted. 0 times theorem prover too weak. 826 trivial. 0 not checked. [2022-03-20 17:46:42,721 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1234502500] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:46:42,721 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:46:42,721 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 7, 7] total 29 [2022-03-20 17:46:42,722 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:46:42,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2075166662] [2022-03-20 17:46:42,722 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2075166662] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:46:42,722 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:46:42,722 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-03-20 17:46:42,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392927317] [2022-03-20 17:46:42,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:46:42,722 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-20 17:46:42,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:46:42,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-20 17:46:42,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=612, Unknown=0, NotChecked=0, Total=812 [2022-03-20 17:46:42,723 INFO L87 Difference]: Start difference. First operand 394 states and 555 transitions. Second operand has 21 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 19 states have internal predecessors, (53), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 17:46:43,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:46:43,725 INFO L93 Difference]: Finished difference Result 804 states and 1168 transitions. [2022-03-20 17:46:43,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-20 17:46:43,726 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 19 states have internal predecessors, (53), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 134 [2022-03-20 17:46:43,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:46:43,728 INFO L225 Difference]: With dead ends: 804 [2022-03-20 17:46:43,728 INFO L226 Difference]: Without dead ends: 449 [2022-03-20 17:46:43,729 INFO L912 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 [2022-03-20 17:46:43,730 INFO L913 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 [2022-03-20 17:46:43,730 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1001 Valid, 49 Invalid, 1281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [388 Valid, 893 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-20 17:46:43,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2022-03-20 17:46:43,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 417. [2022-03-20 17:46:43,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 417 states, 358 states have (on average 1.3463687150837989) internal successors, (482), 358 states have internal predecessors, (482), 54 states have call successors, (54), 6 states have call predecessors, (54), 4 states have return successors, (52), 52 states have call predecessors, (52), 52 states have call successors, (52) [2022-03-20 17:46:43,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 588 transitions. [2022-03-20 17:46:43,793 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 588 transitions. Word has length 134 [2022-03-20 17:46:43,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:46:43,793 INFO L478 AbstractCegarLoop]: Abstraction has 417 states and 588 transitions. [2022-03-20 17:46:43,793 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 19 states have internal predecessors, (53), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 17:46:43,793 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 588 transitions. [2022-03-20 17:46:43,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-03-20 17:46:43,795 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:46:43,795 INFO L499 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:46:43,824 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-03-20 17:46:44,019 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:46:44,019 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:46:44,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:46:44,020 INFO L85 PathProgramCache]: Analyzing trace with hash 143634153, now seen corresponding path program 31 times [2022-03-20 17:46:44,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:46:44,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1017289451] [2022-03-20 17:46:44,021 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:46:44,021 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:46:44,021 INFO L85 PathProgramCache]: Analyzing trace with hash 143634153, now seen corresponding path program 32 times [2022-03-20 17:46:44,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:46:44,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486487266] [2022-03-20 17:46:44,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:46:44,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:46:44,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:44,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:46:44,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:44,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2022-03-20 17:46:44,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:44,261 INFO L134 CoverageAnalysis]: Checked inductivity of 1003 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 714 trivial. 0 not checked. [2022-03-20 17:46:44,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:46:44,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486487266] [2022-03-20 17:46:44,262 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486487266] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:46:44,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1292980283] [2022-03-20 17:46:44,262 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 17:46:44,262 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:46:44,262 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:46:44,264 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 17:46:44,279 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-20 17:46:44,464 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 17:46:44,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:46:44,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 552 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-20 17:46:44,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:46:44,639 INFO L134 CoverageAnalysis]: Checked inductivity of 1003 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 714 trivial. 0 not checked. [2022-03-20 17:46:44,640 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:46:45,232 INFO L134 CoverageAnalysis]: Checked inductivity of 1003 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 714 trivial. 0 not checked. [2022-03-20 17:46:45,233 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1292980283] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:46:45,233 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:46:45,233 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20, 20] total 41 [2022-03-20 17:46:45,233 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:46:45,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1017289451] [2022-03-20 17:46:45,233 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1017289451] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:46:45,233 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:46:45,234 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-03-20 17:46:45,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589737879] [2022-03-20 17:46:45,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:46:45,234 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-20 17:46:45,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:46:45,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-20 17:46:45,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=745, Invalid=895, Unknown=0, NotChecked=0, Total=1640 [2022-03-20 17:46:45,235 INFO L87 Difference]: Start difference. First operand 417 states and 588 transitions. Second operand has 22 states, 22 states have (on average 2.5) internal successors, (55), 20 states have internal predecessors, (55), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 17:46:46,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:46:46,246 INFO L93 Difference]: Finished difference Result 848 states and 1233 transitions. [2022-03-20 17:46:46,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-20 17:46:46,247 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.5) internal successors, (55), 20 states have internal predecessors, (55), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 141 [2022-03-20 17:46:46,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:46:46,249 INFO L225 Difference]: With dead ends: 848 [2022-03-20 17:46:46,249 INFO L226 Difference]: Without dead ends: 472 [2022-03-20 17:46:46,251 INFO L912 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 [2022-03-20 17:46:46,252 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 1221 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 939 mSolverCounterSat, 486 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1225 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 1425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 486 IncrementalHoareTripleChecker+Valid, 939 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-20 17:46:46,252 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1225 Valid, 45 Invalid, 1425 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [486 Valid, 939 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-20 17:46:46,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2022-03-20 17:46:46,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 440. [2022-03-20 17:46:46,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440 states, 378 states have (on average 1.3465608465608465) internal successors, (509), 378 states have internal predecessors, (509), 57 states have call successors, (57), 6 states have call predecessors, (57), 4 states have return successors, (55), 55 states have call predecessors, (55), 55 states have call successors, (55) [2022-03-20 17:46:46,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 621 transitions. [2022-03-20 17:46:46,368 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 621 transitions. Word has length 141 [2022-03-20 17:46:46,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:46:46,368 INFO L478 AbstractCegarLoop]: Abstraction has 440 states and 621 transitions. [2022-03-20 17:46:46,369 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.5) internal successors, (55), 20 states have internal predecessors, (55), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 17:46:46,369 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 621 transitions. [2022-03-20 17:46:46,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2022-03-20 17:46:46,371 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:46:46,371 INFO L499 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:46:46,397 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-03-20 17:46:46,587 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:46:46,587 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:46:46,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:46:46,588 INFO L85 PathProgramCache]: Analyzing trace with hash 2040554055, now seen corresponding path program 33 times [2022-03-20 17:46:46,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:46:46,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1861407563] [2022-03-20 17:46:46,589 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:46:46,589 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:46:46,589 INFO L85 PathProgramCache]: Analyzing trace with hash 2040554055, now seen corresponding path program 34 times [2022-03-20 17:46:46,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:46:46,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094114316] [2022-03-20 17:46:46,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:46:46,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:46:46,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:46,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:46:46,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:46,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2022-03-20 17:46:46,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:46,828 INFO L134 CoverageAnalysis]: Checked inductivity of 1125 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 801 trivial. 0 not checked. [2022-03-20 17:46:46,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:46:46,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094114316] [2022-03-20 17:46:46,828 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094114316] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:46:46,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823155358] [2022-03-20 17:46:46,828 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 17:46:46,828 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:46:46,829 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:46:46,831 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 17:46:46,835 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-03-20 17:46:46,993 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 17:46:46,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:46:46,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 578 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-20 17:46:46,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:46:47,197 INFO L134 CoverageAnalysis]: Checked inductivity of 1125 backedges. 0 proven. 800 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2022-03-20 17:46:47,197 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:46:47,728 INFO L134 CoverageAnalysis]: Checked inductivity of 1125 backedges. 0 proven. 800 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2022-03-20 17:46:47,728 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1823155358] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:46:47,728 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:46:47,728 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21, 21] total 43 [2022-03-20 17:46:47,729 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:46:47,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1861407563] [2022-03-20 17:46:47,729 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1861407563] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:46:47,729 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:46:47,729 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-03-20 17:46:47,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481153322] [2022-03-20 17:46:47,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:46:47,730 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-20 17:46:47,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:46:47,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-20 17:46:47,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=824, Invalid=982, Unknown=0, NotChecked=0, Total=1806 [2022-03-20 17:46:47,731 INFO L87 Difference]: Start difference. First operand 440 states and 621 transitions. Second operand has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 21 states have internal predecessors, (57), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 17:46:48,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:46:48,751 INFO L93 Difference]: Finished difference Result 892 states and 1298 transitions. [2022-03-20 17:46:48,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-20 17:46:48,752 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 21 states have internal predecessors, (57), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 148 [2022-03-20 17:46:48,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:46:48,754 INFO L225 Difference]: With dead ends: 892 [2022-03-20 17:46:48,754 INFO L226 Difference]: Without dead ends: 495 [2022-03-20 17:46:48,756 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 342 GetRequests, 280 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1671, Invalid=2361, Unknown=0, NotChecked=0, Total=4032 [2022-03-20 17:46:48,757 INFO L913 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 [2022-03-20 17:46:48,757 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1036 Valid, 53 Invalid, 1482 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [405 Valid, 1077 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-20 17:46:48,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2022-03-20 17:46:48,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 463. [2022-03-20 17:46:48,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 463 states, 398 states have (on average 1.3467336683417086) internal successors, (536), 398 states have internal predecessors, (536), 60 states have call successors, (60), 6 states have call predecessors, (60), 4 states have return successors, (58), 58 states have call predecessors, (58), 58 states have call successors, (58) [2022-03-20 17:46:48,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 463 states to 463 states and 654 transitions. [2022-03-20 17:46:48,863 INFO L78 Accepts]: Start accepts. Automaton has 463 states and 654 transitions. Word has length 148 [2022-03-20 17:46:48,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:46:48,864 INFO L478 AbstractCegarLoop]: Abstraction has 463 states and 654 transitions. [2022-03-20 17:46:48,864 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 21 states have internal predecessors, (57), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 17:46:48,864 INFO L276 IsEmpty]: Start isEmpty. Operand 463 states and 654 transitions. [2022-03-20 17:46:48,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-03-20 17:46:48,866 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:46:48,866 INFO L499 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:46:48,891 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-03-20 17:46:49,090 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:46:49,090 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:46:49,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:46:49,090 INFO L85 PathProgramCache]: Analyzing trace with hash 1629389349, now seen corresponding path program 35 times [2022-03-20 17:46:49,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:46:49,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2024391956] [2022-03-20 17:46:49,092 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:46:49,092 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:46:49,092 INFO L85 PathProgramCache]: Analyzing trace with hash 1629389349, now seen corresponding path program 36 times [2022-03-20 17:46:49,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:46:49,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519940448] [2022-03-20 17:46:49,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:46:49,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:46:49,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:49,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:46:49,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:49,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2022-03-20 17:46:49,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:49,356 INFO L134 CoverageAnalysis]: Checked inductivity of 1254 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 893 trivial. 0 not checked. [2022-03-20 17:46:49,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:46:49,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519940448] [2022-03-20 17:46:49,356 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519940448] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:46:49,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [255792250] [2022-03-20 17:46:49,356 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 17:46:49,356 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:46:49,357 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:46:49,360 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 17:46:49,381 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-03-20 17:46:49,517 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 17:46:49,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:46:49,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 17:46:49,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:46:49,772 INFO L134 CoverageAnalysis]: Checked inductivity of 1254 backedges. 73 proven. 1 refuted. 0 times theorem prover too weak. 1180 trivial. 0 not checked. [2022-03-20 17:46:49,773 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:46:50,049 INFO L134 CoverageAnalysis]: Checked inductivity of 1254 backedges. 73 proven. 1 refuted. 0 times theorem prover too weak. 1180 trivial. 0 not checked. [2022-03-20 17:46:50,049 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [255792250] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:46:50,050 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:46:50,050 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 7, 7] total 32 [2022-03-20 17:46:50,050 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:46:50,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2024391956] [2022-03-20 17:46:50,050 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2024391956] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:46:50,050 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:46:50,050 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-03-20 17:46:50,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150408972] [2022-03-20 17:46:50,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:46:50,051 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-20 17:46:50,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:46:50,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-20 17:46:50,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=260, Invalid=732, Unknown=0, NotChecked=0, Total=992 [2022-03-20 17:46:50,052 INFO L87 Difference]: Start difference. First operand 463 states and 654 transitions. Second operand has 24 states, 24 states have (on average 2.4583333333333335) internal successors, (59), 22 states have internal predecessors, (59), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 17:46:51,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:46:51,173 INFO L93 Difference]: Finished difference Result 936 states and 1363 transitions. [2022-03-20 17:46:51,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-20 17:46:51,175 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.4583333333333335) internal successors, (59), 22 states have internal predecessors, (59), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 155 [2022-03-20 17:46:51,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:46:51,178 INFO L225 Difference]: With dead ends: 936 [2022-03-20 17:46:51,178 INFO L226 Difference]: Without dead ends: 518 [2022-03-20 17:46:51,180 INFO L912 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 [2022-03-20 17:46:51,180 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 1060 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 1152 mSolverCounterSat, 411 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1064 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 1563 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 411 IncrementalHoareTripleChecker+Valid, 1152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-20 17:46:51,181 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1064 Valid, 53 Invalid, 1563 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [411 Valid, 1152 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-20 17:46:51,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2022-03-20 17:46:51,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 486. [2022-03-20 17:46:51,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 486 states, 418 states have (on average 1.3468899521531101) internal successors, (563), 418 states have internal predecessors, (563), 63 states have call successors, (63), 6 states have call predecessors, (63), 4 states have return successors, (61), 61 states have call predecessors, (61), 61 states have call successors, (61) [2022-03-20 17:46:51,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 486 states to 486 states and 687 transitions. [2022-03-20 17:46:51,277 INFO L78 Accepts]: Start accepts. Automaton has 486 states and 687 transitions. Word has length 155 [2022-03-20 17:46:51,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:46:51,278 INFO L478 AbstractCegarLoop]: Abstraction has 486 states and 687 transitions. [2022-03-20 17:46:51,278 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.4583333333333335) internal successors, (59), 22 states have internal predecessors, (59), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 17:46:51,278 INFO L276 IsEmpty]: Start isEmpty. Operand 486 states and 687 transitions. [2022-03-20 17:46:51,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2022-03-20 17:46:51,280 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:46:51,280 INFO L499 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:46:51,307 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-03-20 17:46:51,495 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:46:51,495 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:46:51,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:46:51,496 INFO L85 PathProgramCache]: Analyzing trace with hash -148049653, now seen corresponding path program 37 times [2022-03-20 17:46:51,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:46:51,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1916687557] [2022-03-20 17:46:51,497 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:46:51,497 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:46:51,497 INFO L85 PathProgramCache]: Analyzing trace with hash -148049653, now seen corresponding path program 38 times [2022-03-20 17:46:51,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:46:51,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038441586] [2022-03-20 17:46:51,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:46:51,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:46:51,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:51,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:46:51,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:51,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2022-03-20 17:46:51,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:51,749 INFO L134 CoverageAnalysis]: Checked inductivity of 1390 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 990 trivial. 0 not checked. [2022-03-20 17:46:51,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:46:51,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038441586] [2022-03-20 17:46:51,750 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038441586] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:46:51,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046931299] [2022-03-20 17:46:51,750 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 17:46:51,750 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:46:51,750 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:46:51,752 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 17:46:51,773 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-03-20 17:46:51,920 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 17:46:51,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:46:51,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 630 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-20 17:46:51,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:46:52,118 INFO L134 CoverageAnalysis]: Checked inductivity of 1390 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 990 trivial. 0 not checked. [2022-03-20 17:46:52,118 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:46:52,772 INFO L134 CoverageAnalysis]: Checked inductivity of 1390 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 990 trivial. 0 not checked. [2022-03-20 17:46:52,772 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1046931299] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:46:52,772 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:46:52,773 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 23, 23] total 47 [2022-03-20 17:46:52,773 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:46:52,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1916687557] [2022-03-20 17:46:52,773 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1916687557] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:46:52,773 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:46:52,773 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-03-20 17:46:52,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630209212] [2022-03-20 17:46:52,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:46:52,773 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-20 17:46:52,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:46:52,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-20 17:46:52,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=994, Invalid=1168, Unknown=0, NotChecked=0, Total=2162 [2022-03-20 17:46:52,775 INFO L87 Difference]: Start difference. First operand 486 states and 687 transitions. Second operand has 25 states, 25 states have (on average 2.44) internal successors, (61), 23 states have internal predecessors, (61), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 17:46:53,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:46:53,941 INFO L93 Difference]: Finished difference Result 980 states and 1428 transitions. [2022-03-20 17:46:53,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-20 17:46:53,941 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.44) internal successors, (61), 23 states have internal predecessors, (61), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 162 [2022-03-20 17:46:53,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:46:53,944 INFO L225 Difference]: With dead ends: 980 [2022-03-20 17:46:53,944 INFO L226 Difference]: Without dead ends: 541 [2022-03-20 17:46:53,946 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 374 GetRequests, 306 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 412 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=2013, Invalid=2817, Unknown=0, NotChecked=0, Total=4830 [2022-03-20 17:46:53,946 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 1164 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 1204 mSolverCounterSat, 478 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1168 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 1682 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 478 IncrementalHoareTripleChecker+Valid, 1204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-20 17:46:53,947 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1168 Valid, 51 Invalid, 1682 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [478 Valid, 1204 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-20 17:46:53,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 541 states. [2022-03-20 17:46:54,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 541 to 509. [2022-03-20 17:46:54,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 509 states, 438 states have (on average 1.3470319634703196) internal successors, (590), 438 states have internal predecessors, (590), 66 states have call successors, (66), 6 states have call predecessors, (66), 4 states have return successors, (64), 64 states have call predecessors, (64), 64 states have call successors, (64) [2022-03-20 17:46:54,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 509 states to 509 states and 720 transitions. [2022-03-20 17:46:54,068 INFO L78 Accepts]: Start accepts. Automaton has 509 states and 720 transitions. Word has length 162 [2022-03-20 17:46:54,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:46:54,068 INFO L478 AbstractCegarLoop]: Abstraction has 509 states and 720 transitions. [2022-03-20 17:46:54,069 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.44) internal successors, (61), 23 states have internal predecessors, (61), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 17:46:54,069 INFO L276 IsEmpty]: Start isEmpty. Operand 509 states and 720 transitions. [2022-03-20 17:46:54,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2022-03-20 17:46:54,071 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:46:54,071 INFO L499 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:46:54,095 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-03-20 17:46:54,288 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-03-20 17:46:54,288 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:46:54,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:46:54,289 INFO L85 PathProgramCache]: Analyzing trace with hash 491700577, now seen corresponding path program 39 times [2022-03-20 17:46:54,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:46:54,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [399765123] [2022-03-20 17:46:54,290 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:46:54,290 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:46:54,290 INFO L85 PathProgramCache]: Analyzing trace with hash 491700577, now seen corresponding path program 40 times [2022-03-20 17:46:54,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:46:54,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263740849] [2022-03-20 17:46:54,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:46:54,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:46:54,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:54,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:46:54,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:54,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 154 [2022-03-20 17:46:54,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:54,572 INFO L134 CoverageAnalysis]: Checked inductivity of 1533 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 1092 trivial. 0 not checked. [2022-03-20 17:46:54,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:46:54,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263740849] [2022-03-20 17:46:54,573 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263740849] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:46:54,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940957126] [2022-03-20 17:46:54,573 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 17:46:54,574 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:46:54,574 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:46:54,575 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 17:46:54,576 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-03-20 17:46:54,753 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 17:46:54,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:46:54,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 656 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-20 17:46:54,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:46:54,989 INFO L134 CoverageAnalysis]: Checked inductivity of 1533 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 1092 trivial. 0 not checked. [2022-03-20 17:46:54,989 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:46:55,682 INFO L134 CoverageAnalysis]: Checked inductivity of 1533 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 1092 trivial. 0 not checked. [2022-03-20 17:46:55,682 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1940957126] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:46:55,682 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:46:55,682 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 24, 24] total 49 [2022-03-20 17:46:55,683 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:46:55,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [399765123] [2022-03-20 17:46:55,683 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [399765123] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:46:55,683 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:46:55,683 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-03-20 17:46:55,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655207265] [2022-03-20 17:46:55,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:46:55,683 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-20 17:46:55,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:46:55,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-20 17:46:55,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1085, Invalid=1267, Unknown=0, NotChecked=0, Total=2352 [2022-03-20 17:46:55,685 INFO L87 Difference]: Start difference. First operand 509 states and 720 transitions. Second operand has 26 states, 26 states have (on average 2.423076923076923) internal successors, (63), 24 states have internal predecessors, (63), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 17:46:56,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:46:56,939 INFO L93 Difference]: Finished difference Result 1024 states and 1493 transitions. [2022-03-20 17:46:56,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-20 17:46:56,940 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.423076923076923) internal successors, (63), 24 states have internal predecessors, (63), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 169 [2022-03-20 17:46:56,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:46:56,942 INFO L225 Difference]: With dead ends: 1024 [2022-03-20 17:46:56,942 INFO L226 Difference]: Without dead ends: 564 [2022-03-20 17:46:56,944 INFO L912 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 [2022-03-20 17:46:56,945 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 1366 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 1189 mSolverCounterSat, 567 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s 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 [2022-03-20 17:46:56,945 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1370 Valid, 51 Invalid, 1756 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [567 Valid, 1189 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-20 17:46:56,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2022-03-20 17:46:57,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 532. [2022-03-20 17:46:57,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 532 states, 458 states have (on average 1.3471615720524017) internal successors, (617), 458 states have internal predecessors, (617), 69 states have call successors, (69), 6 states have call predecessors, (69), 4 states have return successors, (67), 67 states have call predecessors, (67), 67 states have call successors, (67) [2022-03-20 17:46:57,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 532 states to 532 states and 753 transitions. [2022-03-20 17:46:57,088 INFO L78 Accepts]: Start accepts. Automaton has 532 states and 753 transitions. Word has length 169 [2022-03-20 17:46:57,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:46:57,088 INFO L478 AbstractCegarLoop]: Abstraction has 532 states and 753 transitions. [2022-03-20 17:46:57,089 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.423076923076923) internal successors, (63), 24 states have internal predecessors, (63), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 17:46:57,089 INFO L276 IsEmpty]: Start isEmpty. Operand 532 states and 753 transitions. [2022-03-20 17:46:57,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2022-03-20 17:46:57,091 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:46:57,091 INFO L499 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:46:57,111 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-03-20 17:46:57,300 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-03-20 17:46:57,300 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:46:57,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:46:57,300 INFO L85 PathProgramCache]: Analyzing trace with hash 1540862927, now seen corresponding path program 41 times [2022-03-20 17:46:57,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:46:57,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1554832492] [2022-03-20 17:46:57,301 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:46:57,301 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:46:57,302 INFO L85 PathProgramCache]: Analyzing trace with hash 1540862927, now seen corresponding path program 42 times [2022-03-20 17:46:57,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:46:57,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110762937] [2022-03-20 17:46:57,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:46:57,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:46:57,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:57,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:46:57,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:57,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 161 [2022-03-20 17:46:57,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:57,639 INFO L134 CoverageAnalysis]: Checked inductivity of 1683 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 1199 trivial. 0 not checked. [2022-03-20 17:46:57,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:46:57,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110762937] [2022-03-20 17:46:57,640 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110762937] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:46:57,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227253639] [2022-03-20 17:46:57,640 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 17:46:57,640 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:46:57,640 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:46:57,642 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 17:46:57,643 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-03-20 17:46:57,790 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 17:46:57,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:46:57,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 17:46:57,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:46:58,057 INFO L134 CoverageAnalysis]: Checked inductivity of 1683 backedges. 85 proven. 1 refuted. 0 times theorem prover too weak. 1597 trivial. 0 not checked. [2022-03-20 17:46:58,057 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:46:58,360 INFO L134 CoverageAnalysis]: Checked inductivity of 1683 backedges. 85 proven. 1 refuted. 0 times theorem prover too weak. 1597 trivial. 0 not checked. [2022-03-20 17:46:58,360 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1227253639] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:46:58,360 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:46:58,360 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 7, 7] total 35 [2022-03-20 17:46:58,360 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:46:58,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1554832492] [2022-03-20 17:46:58,361 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1554832492] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:46:58,361 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:46:58,361 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-03-20 17:46:58,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354037239] [2022-03-20 17:46:58,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:46:58,361 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-20 17:46:58,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:46:58,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-20 17:46:58,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=861, Unknown=0, NotChecked=0, Total=1190 [2022-03-20 17:46:58,362 INFO L87 Difference]: Start difference. First operand 532 states and 753 transitions. Second operand has 27 states, 27 states have (on average 2.4074074074074074) internal successors, (65), 25 states have internal predecessors, (65), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 17:46:59,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:46:59,716 INFO L93 Difference]: Finished difference Result 1068 states and 1558 transitions. [2022-03-20 17:46:59,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-20 17:46:59,717 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.4074074074074074) internal successors, (65), 25 states have internal predecessors, (65), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 176 [2022-03-20 17:46:59,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:46:59,719 INFO L225 Difference]: With dead ends: 1068 [2022-03-20 17:46:59,719 INFO L226 Difference]: Without dead ends: 587 [2022-03-20 17:46:59,720 INFO L912 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 [2022-03-20 17:46:59,721 INFO L913 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, 0.8s IncrementalHoareTripleChecker+Time [2022-03-20 17:46:59,721 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1432 Valid, 47 Invalid, 1793 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [594 Valid, 1199 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-20 17:46:59,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 587 states. [2022-03-20 17:46:59,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 587 to 555. [2022-03-20 17:46:59,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 555 states, 478 states have (on average 1.3472803347280335) internal successors, (644), 478 states have internal predecessors, (644), 72 states have call successors, (72), 6 states have call predecessors, (72), 4 states have return successors, (70), 70 states have call predecessors, (70), 70 states have call successors, (70) [2022-03-20 17:46:59,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 555 states to 555 states and 786 transitions. [2022-03-20 17:46:59,864 INFO L78 Accepts]: Start accepts. Automaton has 555 states and 786 transitions. Word has length 176 [2022-03-20 17:46:59,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:46:59,865 INFO L478 AbstractCegarLoop]: Abstraction has 555 states and 786 transitions. [2022-03-20 17:46:59,865 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.4074074074074074) internal successors, (65), 25 states have internal predecessors, (65), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 17:46:59,865 INFO L276 IsEmpty]: Start isEmpty. Operand 555 states and 786 transitions. [2022-03-20 17:46:59,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2022-03-20 17:46:59,867 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:46:59,867 INFO L499 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:46:59,893 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-03-20 17:47:00,091 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:47:00,091 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:47:00,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:47:00,091 INFO L85 PathProgramCache]: Analyzing trace with hash 1753296029, now seen corresponding path program 43 times [2022-03-20 17:47:00,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:47:00,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [445789242] [2022-03-20 17:47:00,093 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:47:00,093 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:47:00,093 INFO L85 PathProgramCache]: Analyzing trace with hash 1753296029, now seen corresponding path program 44 times [2022-03-20 17:47:00,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:47:00,093 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533465916] [2022-03-20 17:47:00,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:47:00,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:47:00,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:47:00,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:47:00,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:47:00,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 168 [2022-03-20 17:47:00,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:47:00,415 INFO L134 CoverageAnalysis]: Checked inductivity of 1840 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 1311 trivial. 0 not checked. [2022-03-20 17:47:00,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:47:00,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533465916] [2022-03-20 17:47:00,416 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533465916] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:47:00,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49458991] [2022-03-20 17:47:00,416 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 17:47:00,416 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:47:00,416 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:47:00,417 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 17:47:00,418 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-03-20 17:47:00,596 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 17:47:00,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:47:00,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 708 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-20 17:47:00,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:47:00,817 INFO L134 CoverageAnalysis]: Checked inductivity of 1840 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 1311 trivial. 0 not checked. [2022-03-20 17:47:00,817 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:47:01,589 INFO L134 CoverageAnalysis]: Checked inductivity of 1840 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 1311 trivial. 0 not checked. [2022-03-20 17:47:01,590 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [49458991] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:47:01,590 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:47:01,590 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 26, 26] total 53 [2022-03-20 17:47:01,590 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:47:01,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [445789242] [2022-03-20 17:47:01,590 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [445789242] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:47:01,590 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:47:01,590 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-03-20 17:47:01,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651646199] [2022-03-20 17:47:01,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:47:01,591 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-20 17:47:01,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:47:01,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-20 17:47:01,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1279, Invalid=1477, Unknown=0, NotChecked=0, Total=2756 [2022-03-20 17:47:01,592 INFO L87 Difference]: Start difference. First operand 555 states and 786 transitions. Second operand has 28 states, 28 states have (on average 2.392857142857143) internal successors, (67), 26 states have internal predecessors, (67), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 17:47:02,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:47:02,962 INFO L93 Difference]: Finished difference Result 1112 states and 1623 transitions. [2022-03-20 17:47:02,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-20 17:47:02,962 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.392857142857143) internal successors, (67), 26 states have internal predecessors, (67), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 183 [2022-03-20 17:47:02,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:47:02,964 INFO L225 Difference]: With dead ends: 1112 [2022-03-20 17:47:02,964 INFO L226 Difference]: Without dead ends: 610 [2022-03-20 17:47:02,966 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 422 GetRequests, 345 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 508 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2586, Invalid=3576, Unknown=0, NotChecked=0, Total=6162 [2022-03-20 17:47:02,966 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 1443 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 1347 mSolverCounterSat, 594 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1447 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 1941 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 594 IncrementalHoareTripleChecker+Valid, 1347 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-20 17:47:02,966 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1447 Valid, 51 Invalid, 1941 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [594 Valid, 1347 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-20 17:47:02,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 610 states. [2022-03-20 17:47:03,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 610 to 578. [2022-03-20 17:47:03,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 578 states, 498 states have (on average 1.3473895582329318) internal successors, (671), 498 states have internal predecessors, (671), 75 states have call successors, (75), 6 states have call predecessors, (75), 4 states have return successors, (73), 73 states have call predecessors, (73), 73 states have call successors, (73) [2022-03-20 17:47:03,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 578 states to 578 states and 819 transitions. [2022-03-20 17:47:03,076 INFO L78 Accepts]: Start accepts. Automaton has 578 states and 819 transitions. Word has length 183 [2022-03-20 17:47:03,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:47:03,077 INFO L478 AbstractCegarLoop]: Abstraction has 578 states and 819 transitions. [2022-03-20 17:47:03,077 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.392857142857143) internal successors, (67), 26 states have internal predecessors, (67), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 17:47:03,077 INFO L276 IsEmpty]: Start isEmpty. Operand 578 states and 819 transitions. [2022-03-20 17:47:03,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2022-03-20 17:47:03,079 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:47:03,079 INFO L499 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:47:03,103 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-03-20 17:47:03,295 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:47:03,295 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:47:03,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:47:03,296 INFO L85 PathProgramCache]: Analyzing trace with hash 788523667, now seen corresponding path program 45 times [2022-03-20 17:47:03,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:47:03,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [37248243] [2022-03-20 17:47:03,297 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:47:03,297 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:47:03,297 INFO L85 PathProgramCache]: Analyzing trace with hash 788523667, now seen corresponding path program 46 times [2022-03-20 17:47:03,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:47:03,298 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893611774] [2022-03-20 17:47:03,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:47:03,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:47:03,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:47:03,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:47:03,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:47:03,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2022-03-20 17:47:03,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:47:03,636 INFO L134 CoverageAnalysis]: Checked inductivity of 2004 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 1428 trivial. 0 not checked. [2022-03-20 17:47:03,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:47:03,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893611774] [2022-03-20 17:47:03,637 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893611774] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:47:03,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2147448639] [2022-03-20 17:47:03,637 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 17:47:03,637 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:47:03,637 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:47:03,639 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 17:47:03,640 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-03-20 17:47:03,849 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 17:47:03,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:47:03,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 734 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-20 17:47:03,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:47:04,095 INFO L134 CoverageAnalysis]: Checked inductivity of 2004 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 1428 trivial. 0 not checked. [2022-03-20 17:47:04,095 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:47:04,919 INFO L134 CoverageAnalysis]: Checked inductivity of 2004 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 1428 trivial. 0 not checked. [2022-03-20 17:47:04,919 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2147448639] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:47:04,920 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:47:04,920 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 27, 27] total 55 [2022-03-20 17:47:04,920 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:47:04,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [37248243] [2022-03-20 17:47:04,920 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [37248243] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:47:04,922 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:47:04,922 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-03-20 17:47:04,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118024331] [2022-03-20 17:47:04,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:47:04,923 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-20 17:47:04,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:47:04,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-20 17:47:04,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1382, Invalid=1588, Unknown=0, NotChecked=0, Total=2970 [2022-03-20 17:47:04,924 INFO L87 Difference]: Start difference. First operand 578 states and 819 transitions. Second operand has 29 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 27 states have internal predecessors, (69), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 17:47:06,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:47:06,348 INFO L93 Difference]: Finished difference Result 1156 states and 1688 transitions. [2022-03-20 17:47:06,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-20 17:47:06,348 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 27 states have internal predecessors, (69), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 190 [2022-03-20 17:47:06,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:47:06,350 INFO L225 Difference]: With dead ends: 1156 [2022-03-20 17:47:06,350 INFO L226 Difference]: Without dead ends: 633 [2022-03-20 17:47:06,351 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 438 GetRequests, 358 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 542 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2793, Invalid=3849, Unknown=0, NotChecked=0, Total=6642 [2022-03-20 17:47:06,352 INFO L913 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 [2022-03-20 17:47:06,352 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1432 Valid, 49 Invalid, 1970 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [625 Valid, 1345 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-20 17:47:06,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 633 states. [2022-03-20 17:47:06,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 633 to 601. [2022-03-20 17:47:06,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 601 states, 518 states have (on average 1.3474903474903475) internal successors, (698), 518 states have internal predecessors, (698), 78 states have call successors, (78), 6 states have call predecessors, (78), 4 states have return successors, (76), 76 states have call predecessors, (76), 76 states have call successors, (76) [2022-03-20 17:47:06,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 601 states to 601 states and 852 transitions. [2022-03-20 17:47:06,518 INFO L78 Accepts]: Start accepts. Automaton has 601 states and 852 transitions. Word has length 190 [2022-03-20 17:47:06,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:47:06,518 INFO L478 AbstractCegarLoop]: Abstraction has 601 states and 852 transitions. [2022-03-20 17:47:06,519 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 27 states have internal predecessors, (69), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 17:47:06,519 INFO L276 IsEmpty]: Start isEmpty. Operand 601 states and 852 transitions. [2022-03-20 17:47:06,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2022-03-20 17:47:06,521 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:47:06,521 INFO L499 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:47:06,549 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-03-20 17:47:06,738 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-03-20 17:47:06,739 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:47:06,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:47:06,739 INFO L85 PathProgramCache]: Analyzing trace with hash -543783975, now seen corresponding path program 47 times [2022-03-20 17:47:06,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:47:06,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [374870463] [2022-03-20 17:47:06,740 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:47:06,740 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:47:06,741 INFO L85 PathProgramCache]: Analyzing trace with hash -543783975, now seen corresponding path program 48 times [2022-03-20 17:47:06,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:47:06,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462682213] [2022-03-20 17:47:06,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:47:06,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:47:06,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:47:07,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:47:07,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:47:07,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 182 [2022-03-20 17:47:07,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:47:07,130 INFO L134 CoverageAnalysis]: Checked inductivity of 2175 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 1550 trivial. 0 not checked. [2022-03-20 17:47:07,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:47:07,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462682213] [2022-03-20 17:47:07,131 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462682213] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:47:07,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037333392] [2022-03-20 17:47:07,131 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 17:47:07,131 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:47:07,131 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:47:07,133 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 17:47:07,137 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-03-20 17:47:07,282 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 17:47:07,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:47:07,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 17:47:07,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:47:07,576 INFO L134 CoverageAnalysis]: Checked inductivity of 2175 backedges. 97 proven. 1 refuted. 0 times theorem prover too weak. 2077 trivial. 0 not checked. [2022-03-20 17:47:07,576 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:47:07,886 INFO L134 CoverageAnalysis]: Checked inductivity of 2175 backedges. 97 proven. 1 refuted. 0 times theorem prover too weak. 2077 trivial. 0 not checked. [2022-03-20 17:47:07,886 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1037333392] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:47:07,886 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:47:07,886 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 7, 7] total 38 [2022-03-20 17:47:07,886 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:47:07,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [374870463] [2022-03-20 17:47:07,886 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [374870463] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:47:07,887 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:47:07,887 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-03-20 17:47:07,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557034671] [2022-03-20 17:47:07,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:47:07,887 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-20 17:47:07,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:47:07,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-20 17:47:07,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=407, Invalid=999, Unknown=0, NotChecked=0, Total=1406 [2022-03-20 17:47:07,888 INFO L87 Difference]: Start difference. First operand 601 states and 852 transitions. Second operand has 30 states, 30 states have (on average 2.3666666666666667) internal successors, (71), 28 states have internal predecessors, (71), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 17:47:09,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:47:09,409 INFO L93 Difference]: Finished difference Result 1200 states and 1753 transitions. [2022-03-20 17:47:09,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-20 17:47:09,411 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3666666666666667) internal successors, (71), 28 states have internal predecessors, (71), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 197 [2022-03-20 17:47:09,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:47:09,414 INFO L225 Difference]: With dead ends: 1200 [2022-03-20 17:47:09,414 INFO L226 Difference]: Without dead ends: 656 [2022-03-20 17:47:09,415 INFO L912 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 [2022-03-20 17:47:09,416 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 1545 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 1390 mSolverCounterSat, 620 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1549 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 2010 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 620 IncrementalHoareTripleChecker+Valid, 1390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-20 17:47:09,416 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1549 Valid, 53 Invalid, 2010 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [620 Valid, 1390 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-20 17:47:09,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 656 states. [2022-03-20 17:47:09,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 656 to 624. [2022-03-20 17:47:09,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 624 states, 538 states have (on average 1.3475836431226766) internal successors, (725), 538 states have internal predecessors, (725), 81 states have call successors, (81), 6 states have call predecessors, (81), 4 states have return successors, (79), 79 states have call predecessors, (79), 79 states have call successors, (79) [2022-03-20 17:47:09,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 624 states to 624 states and 885 transitions. [2022-03-20 17:47:09,597 INFO L78 Accepts]: Start accepts. Automaton has 624 states and 885 transitions. Word has length 197 [2022-03-20 17:47:09,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:47:09,597 INFO L478 AbstractCegarLoop]: Abstraction has 624 states and 885 transitions. [2022-03-20 17:47:09,597 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.3666666666666667) internal successors, (71), 28 states have internal predecessors, (71), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 17:47:09,597 INFO L276 IsEmpty]: Start isEmpty. Operand 624 states and 885 transitions. [2022-03-20 17:47:09,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2022-03-20 17:47:09,599 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:47:09,599 INFO L499 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:47:09,620 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-03-20 17:47:09,811 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-03-20 17:47:09,811 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:47:09,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:47:09,812 INFO L85 PathProgramCache]: Analyzing trace with hash 1485100375, now seen corresponding path program 49 times [2022-03-20 17:47:09,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:47:09,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [744057877] [2022-03-20 17:47:09,813 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:47:09,813 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:47:09,813 INFO L85 PathProgramCache]: Analyzing trace with hash 1485100375, now seen corresponding path program 50 times [2022-03-20 17:47:09,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:47:09,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865520964] [2022-03-20 17:47:09,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:47:09,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:47:09,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:47:10,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:47:10,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:47:10,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 189 [2022-03-20 17:47:10,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:47:10,191 INFO L134 CoverageAnalysis]: Checked inductivity of 2353 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 1677 trivial. 0 not checked. [2022-03-20 17:47:10,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:47:10,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865520964] [2022-03-20 17:47:10,192 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865520964] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:47:10,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15657905] [2022-03-20 17:47:10,192 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 17:47:10,192 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:47:10,192 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:47:10,196 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 17:47:10,199 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-03-20 17:47:10,401 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 17:47:10,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:47:10,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 786 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-20 17:47:10,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:47:10,647 INFO L134 CoverageAnalysis]: Checked inductivity of 2353 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 1677 trivial. 0 not checked. [2022-03-20 17:47:10,647 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:47:11,591 INFO L134 CoverageAnalysis]: Checked inductivity of 2353 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 1677 trivial. 0 not checked. [2022-03-20 17:47:11,591 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [15657905] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:47:11,591 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:47:11,591 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 29, 29] total 59 [2022-03-20 17:47:11,591 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:47:11,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [744057877] [2022-03-20 17:47:11,591 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [744057877] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:47:11,592 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:47:11,592 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-03-20 17:47:11,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640970335] [2022-03-20 17:47:11,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:47:11,592 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-20 17:47:11,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:47:11,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-20 17:47:11,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1600, Invalid=1822, Unknown=0, NotChecked=0, Total=3422 [2022-03-20 17:47:11,593 INFO L87 Difference]: Start difference. First operand 624 states and 885 transitions. Second operand has 31 states, 31 states have (on average 2.3548387096774195) internal successors, (73), 29 states have internal predecessors, (73), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 17:47:13,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:47:13,140 INFO L93 Difference]: Finished difference Result 1244 states and 1818 transitions. [2022-03-20 17:47:13,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-20 17:47:13,141 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.3548387096774195) internal successors, (73), 29 states have internal predecessors, (73), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 204 [2022-03-20 17:47:13,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:47:13,143 INFO L225 Difference]: With dead ends: 1244 [2022-03-20 17:47:13,143 INFO L226 Difference]: Without dead ends: 679 [2022-03-20 17:47:13,144 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 470 GetRequests, 384 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 613 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=3231, Invalid=4425, Unknown=0, NotChecked=0, Total=7656 [2022-03-20 17:47:13,145 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 1678 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 1367 mSolverCounterSat, 682 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s 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 [2022-03-20 17:47:13,145 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1682 Valid, 47 Invalid, 2049 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [682 Valid, 1367 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-20 17:47:13,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 679 states. [2022-03-20 17:47:13,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 679 to 647. [2022-03-20 17:47:13,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 647 states, 558 states have (on average 1.3476702508960574) internal successors, (752), 558 states have internal predecessors, (752), 84 states have call successors, (84), 6 states have call predecessors, (84), 4 states have return successors, (82), 82 states have call predecessors, (82), 82 states have call successors, (82) [2022-03-20 17:47:13,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 647 states to 647 states and 918 transitions. [2022-03-20 17:47:13,302 INFO L78 Accepts]: Start accepts. Automaton has 647 states and 918 transitions. Word has length 204 [2022-03-20 17:47:13,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:47:13,303 INFO L478 AbstractCegarLoop]: Abstraction has 647 states and 918 transitions. [2022-03-20 17:47:13,303 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.3548387096774195) internal successors, (73), 29 states have internal predecessors, (73), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 17:47:13,303 INFO L276 IsEmpty]: Start isEmpty. Operand 647 states and 918 transitions. [2022-03-20 17:47:13,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2022-03-20 17:47:13,305 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:47:13,305 INFO L499 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:47:13,329 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2022-03-20 17:47:13,519 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-03-20 17:47:13,519 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:47:13,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:47:13,520 INFO L85 PathProgramCache]: Analyzing trace with hash -319846635, now seen corresponding path program 51 times [2022-03-20 17:47:13,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:47:13,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [638561994] [2022-03-20 17:47:13,521 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:47:13,521 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:47:13,521 INFO L85 PathProgramCache]: Analyzing trace with hash -319846635, now seen corresponding path program 52 times [2022-03-20 17:47:13,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:47:13,522 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091950793] [2022-03-20 17:47:13,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:47:13,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:47:13,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:47:13,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:47:13,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:47:13,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 196 [2022-03-20 17:47:13,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:47:13,941 INFO L134 CoverageAnalysis]: Checked inductivity of 2538 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 1809 trivial. 0 not checked. [2022-03-20 17:47:13,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:47:13,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091950793] [2022-03-20 17:47:13,941 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091950793] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:47:13,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709209854] [2022-03-20 17:47:13,941 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 17:47:13,941 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:47:13,941 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:47:13,944 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 17:47:13,971 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-03-20 17:47:14,178 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 17:47:14,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:47:14,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 812 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-20 17:47:14,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:47:14,532 INFO L134 CoverageAnalysis]: Checked inductivity of 2538 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 1809 trivial. 0 not checked. [2022-03-20 17:47:14,533 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:47:15,542 INFO L134 CoverageAnalysis]: Checked inductivity of 2538 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 1809 trivial. 0 not checked. [2022-03-20 17:47:15,543 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1709209854] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:47:15,543 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:47:15,543 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 30, 30] total 61 [2022-03-20 17:47:15,543 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:47:15,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [638561994] [2022-03-20 17:47:15,543 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [638561994] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:47:15,543 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:47:15,543 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-03-20 17:47:15,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75526362] [2022-03-20 17:47:15,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:47:15,544 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-20 17:47:15,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:47:15,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-20 17:47:15,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1715, Invalid=1945, Unknown=0, NotChecked=0, Total=3660 [2022-03-20 17:47:15,545 INFO L87 Difference]: Start difference. First operand 647 states and 918 transitions. Second operand has 32 states, 32 states have (on average 2.34375) internal successors, (75), 30 states have internal predecessors, (75), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 17:47:17,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:47:17,290 INFO L93 Difference]: Finished difference Result 1288 states and 1883 transitions. [2022-03-20 17:47:17,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-20 17:47:17,291 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.34375) internal successors, (75), 30 states have internal predecessors, (75), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 211 [2022-03-20 17:47:17,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:47:17,293 INFO L225 Difference]: With dead ends: 1288 [2022-03-20 17:47:17,293 INFO L226 Difference]: Without dead ends: 702 [2022-03-20 17:47:17,295 INFO L912 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 [2022-03-20 17:47:17,295 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 1581 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 1762 mSolverCounterSat, 675 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s 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 [2022-03-20 17:47:17,296 INFO L914 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] [2022-03-20 17:47:17,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 702 states. [2022-03-20 17:47:17,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 702 to 670. [2022-03-20 17:47:17,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 670 states, 578 states have (on average 1.3477508650519032) internal successors, (779), 578 states have internal predecessors, (779), 87 states have call successors, (87), 6 states have call predecessors, (87), 4 states have return successors, (85), 85 states have call predecessors, (85), 85 states have call successors, (85) [2022-03-20 17:47:17,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 670 states to 670 states and 951 transitions. [2022-03-20 17:47:17,470 INFO L78 Accepts]: Start accepts. Automaton has 670 states and 951 transitions. Word has length 211 [2022-03-20 17:47:17,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:47:17,471 INFO L478 AbstractCegarLoop]: Abstraction has 670 states and 951 transitions. [2022-03-20 17:47:17,471 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.34375) internal successors, (75), 30 states have internal predecessors, (75), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 17:47:17,471 INFO L276 IsEmpty]: Start isEmpty. Operand 670 states and 951 transitions. [2022-03-20 17:47:17,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2022-03-20 17:47:17,473 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:47:17,473 INFO L499 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:47:17,492 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2022-03-20 17:47:17,679 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:47:17,679 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:47:17,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:47:17,680 INFO L85 PathProgramCache]: Analyzing trace with hash -993676261, now seen corresponding path program 53 times [2022-03-20 17:47:17,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:47:17,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1573476779] [2022-03-20 17:47:17,681 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:47:17,681 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:47:17,681 INFO L85 PathProgramCache]: Analyzing trace with hash -993676261, now seen corresponding path program 54 times [2022-03-20 17:47:17,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:47:17,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936889269] [2022-03-20 17:47:17,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:47:17,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:47:17,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:47:18,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:47:18,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:47:18,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 203 [2022-03-20 17:47:18,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:47:18,118 INFO L134 CoverageAnalysis]: Checked inductivity of 2730 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 1946 trivial. 0 not checked. [2022-03-20 17:47:18,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:47:18,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936889269] [2022-03-20 17:47:18,119 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936889269] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:47:18,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796279782] [2022-03-20 17:47:18,119 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 17:47:18,119 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:47:18,119 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:47:18,121 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 17:47:18,146 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-03-20 17:47:18,307 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 17:47:18,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:47:18,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 17:47:18,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:47:18,638 INFO L134 CoverageAnalysis]: Checked inductivity of 2730 backedges. 109 proven. 1 refuted. 0 times theorem prover too weak. 2620 trivial. 0 not checked. [2022-03-20 17:47:18,638 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:47:19,014 INFO L134 CoverageAnalysis]: Checked inductivity of 2730 backedges. 109 proven. 1 refuted. 0 times theorem prover too weak. 2620 trivial. 0 not checked. [2022-03-20 17:47:19,014 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1796279782] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:47:19,014 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:47:19,014 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 7, 7] total 41 [2022-03-20 17:47:19,015 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:47:19,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1573476779] [2022-03-20 17:47:19,015 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1573476779] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:47:19,015 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:47:19,015 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-03-20 17:47:19,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999715909] [2022-03-20 17:47:19,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:47:19,015 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-20 17:47:19,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:47:19,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-20 17:47:19,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=494, Invalid=1146, Unknown=0, NotChecked=0, Total=1640 [2022-03-20 17:47:19,016 INFO L87 Difference]: Start difference. First operand 670 states and 951 transitions. Second operand has 33 states, 33 states have (on average 2.3333333333333335) internal successors, (77), 31 states have internal predecessors, (77), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 17:47:20,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:47:20,804 INFO L93 Difference]: Finished difference Result 1332 states and 1948 transitions. [2022-03-20 17:47:20,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-20 17:47:20,805 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 [2022-03-20 17:47:20,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:47:20,807 INFO L225 Difference]: With dead ends: 1332 [2022-03-20 17:47:20,807 INFO L226 Difference]: Without dead ends: 725 [2022-03-20 17:47:20,809 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 502 GetRequests, 431 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 810 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1489, Invalid=3623, Unknown=0, NotChecked=0, Total=5112 [2022-03-20 17:47:20,809 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 1726 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 1555 mSolverCounterSat, 769 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s 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, 1.0s IncrementalHoareTripleChecker+Time [2022-03-20 17:47:20,809 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1730 Valid, 45 Invalid, 2324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [769 Valid, 1555 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-20 17:47:20,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 725 states. [2022-03-20 17:47:20,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 725 to 693. [2022-03-20 17:47:20,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 693 states, 598 states have (on average 1.3478260869565217) internal successors, (806), 598 states have internal predecessors, (806), 90 states have call successors, (90), 6 states have call predecessors, (90), 4 states have return successors, (88), 88 states have call predecessors, (88), 88 states have call successors, (88) [2022-03-20 17:47:20,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 693 states to 693 states and 984 transitions. [2022-03-20 17:47:20,979 INFO L78 Accepts]: Start accepts. Automaton has 693 states and 984 transitions. Word has length 218 [2022-03-20 17:47:20,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:47:20,979 INFO L478 AbstractCegarLoop]: Abstraction has 693 states and 984 transitions. [2022-03-20 17:47:20,979 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.3333333333333335) internal successors, (77), 31 states have internal predecessors, (77), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 17:47:20,979 INFO L276 IsEmpty]: Start isEmpty. Operand 693 states and 984 transitions. [2022-03-20 17:47:20,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2022-03-20 17:47:20,982 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:47:20,982 INFO L499 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:47:21,005 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-03-20 17:47:21,195 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:47:21,195 INFO L403 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:47:21,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:47:21,196 INFO L85 PathProgramCache]: Analyzing trace with hash 611120721, now seen corresponding path program 55 times [2022-03-20 17:47:21,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:47:21,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [689514320] [2022-03-20 17:47:21,197 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:47:21,197 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:47:21,197 INFO L85 PathProgramCache]: Analyzing trace with hash 611120721, now seen corresponding path program 56 times [2022-03-20 17:47:21,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:47:21,197 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138423281] [2022-03-20 17:47:21,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:47:21,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:47:21,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:47:21,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:47:21,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:47:21,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 210 [2022-03-20 17:47:21,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:47:21,633 INFO L134 CoverageAnalysis]: Checked inductivity of 2929 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 2088 trivial. 0 not checked. [2022-03-20 17:47:21,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:47:21,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138423281] [2022-03-20 17:47:21,634 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2138423281] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:47:21,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593516593] [2022-03-20 17:47:21,634 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 17:47:21,634 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:47:21,634 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:47:21,636 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 17:47:21,636 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-03-20 17:47:21,853 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 17:47:21,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:47:21,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 864 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-20 17:47:21,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:47:22,180 INFO L134 CoverageAnalysis]: Checked inductivity of 2929 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 2088 trivial. 0 not checked. [2022-03-20 17:47:22,180 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:47:23,330 INFO L134 CoverageAnalysis]: Checked inductivity of 2929 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 2088 trivial. 0 not checked. [2022-03-20 17:47:23,331 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1593516593] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:47:23,331 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:47:23,331 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 32, 32] total 65 [2022-03-20 17:47:23,331 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:47:23,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [689514320] [2022-03-20 17:47:23,332 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [689514320] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:47:23,332 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:47:23,332 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-03-20 17:47:23,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025872546] [2022-03-20 17:47:23,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:47:23,332 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-03-20 17:47:23,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:47:23,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-03-20 17:47:23,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1957, Invalid=2203, Unknown=0, NotChecked=0, Total=4160 [2022-03-20 17:47:23,333 INFO L87 Difference]: Start difference. First operand 693 states and 984 transitions. Second operand has 34 states, 34 states have (on average 2.323529411764706) internal successors, (79), 32 states have internal predecessors, (79), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 17:47:25,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:47:25,195 INFO L93 Difference]: Finished difference Result 1376 states and 2013 transitions. [2022-03-20 17:47:25,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-20 17:47:25,195 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.323529411764706) internal successors, (79), 32 states have internal predecessors, (79), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 225 [2022-03-20 17:47:25,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:47:25,197 INFO L225 Difference]: With dead ends: 1376 [2022-03-20 17:47:25,197 INFO L226 Difference]: Without dead ends: 748 [2022-03-20 17:47:25,199 INFO L912 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 [2022-03-20 17:47:25,199 INFO L913 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 [2022-03-20 17:47:25,199 INFO L914 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] [2022-03-20 17:47:25,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 748 states. [2022-03-20 17:47:25,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 748 to 716. [2022-03-20 17:47:25,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 716 states, 618 states have (on average 1.3478964401294498) internal successors, (833), 618 states have internal predecessors, (833), 93 states have call successors, (93), 6 states have call predecessors, (93), 4 states have return successors, (91), 91 states have call predecessors, (91), 91 states have call successors, (91) [2022-03-20 17:47:25,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 716 states to 716 states and 1017 transitions. [2022-03-20 17:47:25,415 INFO L78 Accepts]: Start accepts. Automaton has 716 states and 1017 transitions. Word has length 225 [2022-03-20 17:47:25,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:47:25,416 INFO L478 AbstractCegarLoop]: Abstraction has 716 states and 1017 transitions. [2022-03-20 17:47:25,416 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.323529411764706) internal successors, (79), 32 states have internal predecessors, (79), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 17:47:25,416 INFO L276 IsEmpty]: Start isEmpty. Operand 716 states and 1017 transitions. [2022-03-20 17:47:25,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2022-03-20 17:47:25,418 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:47:25,418 INFO L499 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:47:25,445 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-03-20 17:47:25,642 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:47:25,642 INFO L403 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:47:25,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:47:25,643 INFO L85 PathProgramCache]: Analyzing trace with hash 144819935, now seen corresponding path program 57 times [2022-03-20 17:47:25,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:47:25,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1205219267] [2022-03-20 17:47:25,644 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:47:25,644 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:47:25,645 INFO L85 PathProgramCache]: Analyzing trace with hash 144819935, now seen corresponding path program 58 times [2022-03-20 17:47:25,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:47:25,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070150208] [2022-03-20 17:47:25,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:47:25,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:47:25,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:47:26,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:47:26,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:47:26,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 217 [2022-03-20 17:47:26,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:47:26,084 INFO L134 CoverageAnalysis]: Checked inductivity of 3135 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 2235 trivial. 0 not checked. [2022-03-20 17:47:26,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:47:26,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070150208] [2022-03-20 17:47:26,085 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070150208] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:47:26,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937528026] [2022-03-20 17:47:26,085 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 17:47:26,085 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:47:26,085 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:47:26,088 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 17:47:26,115 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-03-20 17:47:26,335 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 17:47:26,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:47:26,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 890 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-20 17:47:26,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:47:26,611 INFO L134 CoverageAnalysis]: Checked inductivity of 3135 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 2235 trivial. 0 not checked. [2022-03-20 17:47:26,612 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:47:27,808 INFO L134 CoverageAnalysis]: Checked inductivity of 3135 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 2235 trivial. 0 not checked. [2022-03-20 17:47:27,808 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [937528026] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:47:27,808 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:47:27,808 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 33, 33] total 67 [2022-03-20 17:47:27,809 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:47:27,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1205219267] [2022-03-20 17:47:27,809 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1205219267] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:47:27,809 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:47:27,809 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-03-20 17:47:27,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011552956] [2022-03-20 17:47:27,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:47:27,810 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-20 17:47:27,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:47:27,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-20 17:47:27,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2084, Invalid=2338, Unknown=0, NotChecked=0, Total=4422 [2022-03-20 17:47:27,811 INFO L87 Difference]: Start difference. First operand 716 states and 1017 transitions. Second operand has 35 states, 35 states have (on average 2.3142857142857145) internal successors, (81), 33 states have internal predecessors, (81), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 17:47:29,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:47:29,846 INFO L93 Difference]: Finished difference Result 1420 states and 2078 transitions. [2022-03-20 17:47:29,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-03-20 17:47:29,846 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.3142857142857145) internal successors, (81), 33 states have internal predecessors, (81), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 232 [2022-03-20 17:47:29,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:47:29,849 INFO L225 Difference]: With dead ends: 1420 [2022-03-20 17:47:29,849 INFO L226 Difference]: Without dead ends: 771 [2022-03-20 17:47:29,851 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 534 GetRequests, 436 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 767 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=4203, Invalid=5697, Unknown=0, NotChecked=0, Total=9900 [2022-03-20 17:47:29,852 INFO L913 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 [2022-03-20 17:47:29,852 INFO L914 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] [2022-03-20 17:47:29,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 771 states. [2022-03-20 17:47:30,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 771 to 739. [2022-03-20 17:47:30,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 739 states, 638 states have (on average 1.347962382445141) internal successors, (860), 638 states have internal predecessors, (860), 96 states have call successors, (96), 6 states have call predecessors, (96), 4 states have return successors, (94), 94 states have call predecessors, (94), 94 states have call successors, (94) [2022-03-20 17:47:30,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 739 states to 739 states and 1050 transitions. [2022-03-20 17:47:30,070 INFO L78 Accepts]: Start accepts. Automaton has 739 states and 1050 transitions. Word has length 232 [2022-03-20 17:47:30,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:47:30,071 INFO L478 AbstractCegarLoop]: Abstraction has 739 states and 1050 transitions. [2022-03-20 17:47:30,071 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.3142857142857145) internal successors, (81), 33 states have internal predecessors, (81), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 17:47:30,071 INFO L276 IsEmpty]: Start isEmpty. Operand 739 states and 1050 transitions. [2022-03-20 17:47:30,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2022-03-20 17:47:30,073 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:47:30,073 INFO L499 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:47:30,090 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2022-03-20 17:47:30,273 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2022-03-20 17:47:30,273 INFO L403 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:47:30,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:47:30,274 INFO L85 PathProgramCache]: Analyzing trace with hash -1620078195, now seen corresponding path program 59 times [2022-03-20 17:47:30,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:47:30,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1343441581] [2022-03-20 17:47:30,275 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:47:30,275 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:47:30,275 INFO L85 PathProgramCache]: Analyzing trace with hash -1620078195, now seen corresponding path program 60 times [2022-03-20 17:47:30,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:47:30,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143092758] [2022-03-20 17:47:30,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:47:30,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:47:30,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:47:30,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:47:30,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:47:30,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 224 [2022-03-20 17:47:30,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:47:30,797 INFO L134 CoverageAnalysis]: Checked inductivity of 3348 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 2387 trivial. 0 not checked. [2022-03-20 17:47:30,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:47:30,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143092758] [2022-03-20 17:47:30,798 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143092758] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:47:30,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454370750] [2022-03-20 17:47:30,798 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 17:47:30,798 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:47:30,798 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:47:30,800 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 17:47:30,826 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-03-20 17:47:31,013 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 17:47:31,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:47:31,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 17:47:31,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:47:31,359 INFO L134 CoverageAnalysis]: Checked inductivity of 3348 backedges. 121 proven. 1 refuted. 0 times theorem prover too weak. 3226 trivial. 0 not checked. [2022-03-20 17:47:31,359 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:47:31,679 INFO L134 CoverageAnalysis]: Checked inductivity of 3348 backedges. 121 proven. 1 refuted. 0 times theorem prover too weak. 3226 trivial. 0 not checked. [2022-03-20 17:47:31,679 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1454370750] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:47:31,679 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:47:31,680 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 7, 7] total 44 [2022-03-20 17:47:31,680 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:47:31,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1343441581] [2022-03-20 17:47:31,680 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1343441581] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:47:31,680 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:47:31,680 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-03-20 17:47:31,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147498085] [2022-03-20 17:47:31,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:47:31,681 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-03-20 17:47:31,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:47:31,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-03-20 17:47:31,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=590, Invalid=1302, Unknown=0, NotChecked=0, Total=1892 [2022-03-20 17:47:31,682 INFO L87 Difference]: Start difference. First operand 739 states and 1050 transitions. Second operand has 36 states, 36 states have (on average 2.3055555555555554) internal successors, (83), 34 states have internal predecessors, (83), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 17:47:33,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:47:33,766 INFO L93 Difference]: Finished difference Result 1464 states and 2143 transitions. [2022-03-20 17:47:33,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-20 17:47:33,766 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.3055555555555554) internal successors, (83), 34 states have internal predecessors, (83), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 239 [2022-03-20 17:47:33,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:47:33,770 INFO L225 Difference]: With dead ends: 1464 [2022-03-20 17:47:33,770 INFO L226 Difference]: Without dead ends: 794 [2022-03-20 17:47:33,771 INFO L912 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 [2022-03-20 17:47:33,771 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 1851 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 1915 mSolverCounterSat, 804 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s 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 [2022-03-20 17:47:33,772 INFO L914 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] [2022-03-20 17:47:33,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 794 states. [2022-03-20 17:47:33,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 794 to 762. [2022-03-20 17:47:33,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 762 states, 658 states have (on average 1.3480243161094225) internal successors, (887), 658 states have internal predecessors, (887), 99 states have call successors, (99), 6 states have call predecessors, (99), 4 states have return successors, (97), 97 states have call predecessors, (97), 97 states have call successors, (97) [2022-03-20 17:47:33,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 762 states to 762 states and 1083 transitions. [2022-03-20 17:47:33,959 INFO L78 Accepts]: Start accepts. Automaton has 762 states and 1083 transitions. Word has length 239 [2022-03-20 17:47:33,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:47:33,960 INFO L478 AbstractCegarLoop]: Abstraction has 762 states and 1083 transitions. [2022-03-20 17:47:33,960 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.3055555555555554) internal successors, (83), 34 states have internal predecessors, (83), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 17:47:33,960 INFO L276 IsEmpty]: Start isEmpty. Operand 762 states and 1083 transitions. [2022-03-20 17:47:33,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2022-03-20 17:47:33,962 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:47:33,962 INFO L499 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:47:33,986 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2022-03-20 17:47:34,185 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:47:34,186 INFO L403 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:47:34,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:47:34,186 INFO L85 PathProgramCache]: Analyzing trace with hash 91770275, now seen corresponding path program 61 times [2022-03-20 17:47:34,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:47:34,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1690446007] [2022-03-20 17:47:34,187 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:47:34,188 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:47:34,188 INFO L85 PathProgramCache]: Analyzing trace with hash 91770275, now seen corresponding path program 62 times [2022-03-20 17:47:34,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:47:34,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978880926] [2022-03-20 17:47:34,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:47:34,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:47:34,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:47:34,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:47:34,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:47:34,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 231 [2022-03-20 17:47:34,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:47:34,695 INFO L134 CoverageAnalysis]: Checked inductivity of 3568 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 2544 trivial. 0 not checked. [2022-03-20 17:47:34,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:47:34,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978880926] [2022-03-20 17:47:34,695 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978880926] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:47:34,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [780963320] [2022-03-20 17:47:34,696 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 17:47:34,696 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:47:34,696 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:47:34,697 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 17:47:34,698 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-03-20 17:47:34,950 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 17:47:34,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:47:34,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 942 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-20 17:47:34,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:47:35,228 INFO L134 CoverageAnalysis]: Checked inductivity of 3568 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 2544 trivial. 0 not checked. [2022-03-20 17:47:35,228 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:47:36,548 INFO L134 CoverageAnalysis]: Checked inductivity of 3568 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 2544 trivial. 0 not checked. [2022-03-20 17:47:36,548 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [780963320] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:47:36,548 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:47:36,549 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 35, 35] total 71 [2022-03-20 17:47:36,549 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:47:36,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1690446007] [2022-03-20 17:47:36,549 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1690446007] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:47:36,549 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:47:36,549 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-03-20 17:47:36,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864204972] [2022-03-20 17:47:36,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:47:36,549 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-03-20 17:47:36,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:47:36,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-03-20 17:47:36,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2350, Invalid=2620, Unknown=0, NotChecked=0, Total=4970 [2022-03-20 17:47:36,551 INFO L87 Difference]: Start difference. First operand 762 states and 1083 transitions. Second operand has 37 states, 37 states have (on average 2.2972972972972974) internal successors, (85), 35 states have internal predecessors, (85), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 17:47:38,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:47:38,680 INFO L93 Difference]: Finished difference Result 1508 states and 2208 transitions. [2022-03-20 17:47:38,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-20 17:47:38,680 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.2972972972972974) internal successors, (85), 35 states have internal predecessors, (85), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 246 [2022-03-20 17:47:38,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:47:38,683 INFO L225 Difference]: With dead ends: 1508 [2022-03-20 17:47:38,683 INFO L226 Difference]: Without dead ends: 817 [2022-03-20 17:47:38,685 INFO L912 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 [2022-03-20 17:47:38,685 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 1897 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 1971 mSolverCounterSat, 865 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s 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, 1.2s IncrementalHoareTripleChecker+Time [2022-03-20 17:47:38,685 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1901 Valid, 51 Invalid, 2836 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [865 Valid, 1971 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-03-20 17:47:38,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 817 states. [2022-03-20 17:47:38,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 817 to 785. [2022-03-20 17:47:38,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 785 states, 678 states have (on average 1.3480825958702065) internal successors, (914), 678 states have internal predecessors, (914), 102 states have call successors, (102), 6 states have call predecessors, (102), 4 states have return successors, (100), 100 states have call predecessors, (100), 100 states have call successors, (100) [2022-03-20 17:47:38,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 785 states to 785 states and 1116 transitions. [2022-03-20 17:47:38,909 INFO L78 Accepts]: Start accepts. Automaton has 785 states and 1116 transitions. Word has length 246 [2022-03-20 17:47:38,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:47:38,910 INFO L478 AbstractCegarLoop]: Abstraction has 785 states and 1116 transitions. [2022-03-20 17:47:38,910 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.2972972972972974) internal successors, (85), 35 states have internal predecessors, (85), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 17:47:38,910 INFO L276 IsEmpty]: Start isEmpty. Operand 785 states and 1116 transitions. [2022-03-20 17:47:38,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2022-03-20 17:47:38,911 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:47:38,912 INFO L499 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:47:38,930 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2022-03-20 17:47:39,112 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:47:39,112 INFO L403 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:47:39,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:47:39,112 INFO L85 PathProgramCache]: Analyzing trace with hash 1490557129, now seen corresponding path program 63 times [2022-03-20 17:47:39,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:47:39,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1083664439] [2022-03-20 17:47:39,114 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:47:39,114 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:47:39,114 INFO L85 PathProgramCache]: Analyzing trace with hash 1490557129, now seen corresponding path program 64 times [2022-03-20 17:47:39,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:47:39,114 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962649612] [2022-03-20 17:47:39,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:47:39,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:47:39,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:47:39,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:47:39,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:47:39,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 238 [2022-03-20 17:47:39,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:47:39,652 INFO L134 CoverageAnalysis]: Checked inductivity of 3795 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 2706 trivial. 0 not checked. [2022-03-20 17:47:39,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:47:39,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962649612] [2022-03-20 17:47:39,653 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962649612] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:47:39,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100488803] [2022-03-20 17:47:39,653 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 17:47:39,653 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:47:39,653 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:47:39,656 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 17:47:39,671 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-03-20 17:47:39,918 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 17:47:39,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:47:39,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 968 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-20 17:47:39,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:47:40,214 INFO L134 CoverageAnalysis]: Checked inductivity of 3795 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 2706 trivial. 0 not checked. [2022-03-20 17:47:40,214 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:47:41,592 INFO L134 CoverageAnalysis]: Checked inductivity of 3795 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 2706 trivial. 0 not checked. [2022-03-20 17:47:41,592 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1100488803] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:47:41,592 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:47:41,592 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 36, 36] total 73 [2022-03-20 17:47:41,593 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:47:41,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1083664439] [2022-03-20 17:47:41,593 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1083664439] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:47:41,593 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:47:41,593 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-03-20 17:47:41,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240097117] [2022-03-20 17:47:41,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:47:41,594 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-03-20 17:47:41,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:47:41,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-03-20 17:47:41,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2489, Invalid=2767, Unknown=0, NotChecked=0, Total=5256 [2022-03-20 17:47:41,596 INFO L87 Difference]: Start difference. First operand 785 states and 1116 transitions. Second operand has 38 states, 38 states have (on average 2.289473684210526) internal successors, (87), 36 states have internal predecessors, (87), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 17:47:43,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:47:43,793 INFO L93 Difference]: Finished difference Result 1552 states and 2273 transitions. [2022-03-20 17:47:43,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-20 17:47:43,793 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.289473684210526) internal successors, (87), 36 states have internal predecessors, (87), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 253 [2022-03-20 17:47:43,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:47:43,796 INFO L225 Difference]: With dead ends: 1552 [2022-03-20 17:47:43,796 INFO L226 Difference]: Without dead ends: 840 [2022-03-20 17:47:43,798 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 582 GetRequests, 475 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 893 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=5016, Invalid=6756, Unknown=0, NotChecked=0, Total=11772 [2022-03-20 17:47:43,799 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 2100 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 1881 mSolverCounterSat, 928 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2104 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 2809 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 928 IncrementalHoareTripleChecker+Valid, 1881 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-20 17:47:43,799 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2104 Valid, 49 Invalid, 2809 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [928 Valid, 1881 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-03-20 17:47:43,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 840 states. [2022-03-20 17:47:44,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 840 to 808. [2022-03-20 17:47:44,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 808 states, 698 states have (on average 1.348137535816619) internal successors, (941), 698 states have internal predecessors, (941), 105 states have call successors, (105), 6 states have call predecessors, (105), 4 states have return successors, (103), 103 states have call predecessors, (103), 103 states have call successors, (103) [2022-03-20 17:47:44,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 808 states to 808 states and 1149 transitions. [2022-03-20 17:47:44,012 INFO L78 Accepts]: Start accepts. Automaton has 808 states and 1149 transitions. Word has length 253 [2022-03-20 17:47:44,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:47:44,013 INFO L478 AbstractCegarLoop]: Abstraction has 808 states and 1149 transitions. [2022-03-20 17:47:44,013 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.289473684210526) internal successors, (87), 36 states have internal predecessors, (87), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 17:47:44,013 INFO L276 IsEmpty]: Start isEmpty. Operand 808 states and 1149 transitions. [2022-03-20 17:47:44,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2022-03-20 17:47:44,014 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:47:44,015 INFO L499 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:47:44,032 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2022-03-20 17:47:44,215 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-03-20 17:47:44,215 INFO L403 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:47:44,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:47:44,216 INFO L85 PathProgramCache]: Analyzing trace with hash -1926723481, now seen corresponding path program 65 times [2022-03-20 17:47:44,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:47:44,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1634562165] [2022-03-20 17:47:44,217 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:47:44,217 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:47:44,217 INFO L85 PathProgramCache]: Analyzing trace with hash -1926723481, now seen corresponding path program 66 times [2022-03-20 17:47:44,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:47:44,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858422303] [2022-03-20 17:47:44,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:47:44,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:47:44,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:47:44,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:47:44,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:47:44,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 245 [2022-03-20 17:47:44,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:47:44,816 INFO L134 CoverageAnalysis]: Checked inductivity of 4029 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 2873 trivial. 0 not checked. [2022-03-20 17:47:44,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:47:44,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858422303] [2022-03-20 17:47:44,816 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858422303] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:47:44,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572161395] [2022-03-20 17:47:44,817 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 17:47:44,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:47:44,817 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:47:44,818 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 17:47:44,819 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-03-20 17:47:45,014 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 17:47:45,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:47:45,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 17:47:45,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:47:45,385 INFO L134 CoverageAnalysis]: Checked inductivity of 4029 backedges. 133 proven. 1 refuted. 0 times theorem prover too weak. 3895 trivial. 0 not checked. [2022-03-20 17:47:45,385 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:47:45,750 INFO L134 CoverageAnalysis]: Checked inductivity of 4029 backedges. 133 proven. 1 refuted. 0 times theorem prover too weak. 3895 trivial. 0 not checked. [2022-03-20 17:47:45,750 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [572161395] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:47:45,750 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:47:45,750 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 7, 7] total 47 [2022-03-20 17:47:45,750 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:47:45,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1634562165] [2022-03-20 17:47:45,750 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1634562165] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:47:45,750 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:47:45,750 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2022-03-20 17:47:45,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658514452] [2022-03-20 17:47:45,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:47:45,751 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-03-20 17:47:45,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:47:45,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-03-20 17:47:45,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=695, Invalid=1467, Unknown=0, NotChecked=0, Total=2162 [2022-03-20 17:47:45,752 INFO L87 Difference]: Start difference. First operand 808 states and 1149 transitions. Second operand has 39 states, 39 states have (on average 2.282051282051282) internal successors, (89), 37 states have internal predecessors, (89), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 17:47:48,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:47:48,011 INFO L93 Difference]: Finished difference Result 1596 states and 2338 transitions. [2022-03-20 17:47:48,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-03-20 17:47:48,011 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.282051282051282) internal successors, (89), 37 states have internal predecessors, (89), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 260 [2022-03-20 17:47:48,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:47:48,015 INFO L225 Difference]: With dead ends: 1596 [2022-03-20 17:47:48,015 INFO L226 Difference]: Without dead ends: 863 [2022-03-20 17:47:48,016 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 598 GetRequests, 515 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1083 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2104, Invalid=4868, Unknown=0, NotChecked=0, Total=6972 [2022-03-20 17:47:48,016 INFO L913 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 [2022-03-20 17:47:48,017 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2115 Valid, 51 Invalid, 2736 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [887 Valid, 1849 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-03-20 17:47:48,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 863 states. [2022-03-20 17:47:48,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 863 to 831. [2022-03-20 17:47:48,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 831 states, 718 states have (on average 1.3481894150417828) internal successors, (968), 718 states have internal predecessors, (968), 108 states have call successors, (108), 6 states have call predecessors, (108), 4 states have return successors, (106), 106 states have call predecessors, (106), 106 states have call successors, (106) [2022-03-20 17:47:48,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 831 states to 831 states and 1182 transitions. [2022-03-20 17:47:48,231 INFO L78 Accepts]: Start accepts. Automaton has 831 states and 1182 transitions. Word has length 260 [2022-03-20 17:47:48,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:47:48,231 INFO L478 AbstractCegarLoop]: Abstraction has 831 states and 1182 transitions. [2022-03-20 17:47:48,231 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.282051282051282) internal successors, (89), 37 states have internal predecessors, (89), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 17:47:48,231 INFO L276 IsEmpty]: Start isEmpty. Operand 831 states and 1182 transitions. [2022-03-20 17:47:48,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2022-03-20 17:47:48,233 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:47:48,233 INFO L499 BasicCegarLoop]: trace histogram [35, 35, 35, 35, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:47:48,250 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2022-03-20 17:47:48,433 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-03-20 17:47:48,434 INFO L403 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:47:48,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:47:48,434 INFO L85 PathProgramCache]: Analyzing trace with hash -1996010491, now seen corresponding path program 67 times [2022-03-20 17:47:48,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:47:48,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1690114531] [2022-03-20 17:47:48,436 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:47:48,436 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:47:48,436 INFO L85 PathProgramCache]: Analyzing trace with hash -1996010491, now seen corresponding path program 68 times [2022-03-20 17:47:48,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:47:48,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986874084] [2022-03-20 17:47:48,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:47:48,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:47:48,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:47:49,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:47:49,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:47:49,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 252 [2022-03-20 17:47:49,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:47:49,089 INFO L134 CoverageAnalysis]: Checked inductivity of 4270 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 3045 trivial. 0 not checked. [2022-03-20 17:47:49,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:47:49,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986874084] [2022-03-20 17:47:49,090 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986874084] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:47:49,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [238614073] [2022-03-20 17:47:49,090 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 17:47:49,090 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:47:49,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:47:49,092 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 17:47:49,100 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-03-20 17:47:49,419 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 17:47:49,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:47:49,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 1020 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-20 17:47:49,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:47:49,755 INFO L134 CoverageAnalysis]: Checked inductivity of 4270 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 3045 trivial. 0 not checked. [2022-03-20 17:47:49,756 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:47:51,276 INFO L134 CoverageAnalysis]: Checked inductivity of 4270 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 3045 trivial. 0 not checked. [2022-03-20 17:47:51,276 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [238614073] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:47:51,277 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:47:51,277 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 38, 38] total 77 [2022-03-20 17:47:51,277 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:47:51,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1690114531] [2022-03-20 17:47:51,277 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1690114531] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:47:51,277 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:47:51,277 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2022-03-20 17:47:51,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803843467] [2022-03-20 17:47:51,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:47:51,277 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-03-20 17:47:51,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:47:51,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-03-20 17:47:51,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2779, Invalid=3073, Unknown=0, NotChecked=0, Total=5852 [2022-03-20 17:47:51,279 INFO L87 Difference]: Start difference. First operand 831 states and 1182 transitions. Second operand has 40 states, 40 states have (on average 2.275) internal successors, (91), 38 states have internal predecessors, (91), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 17:47:53,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:47:53,704 INFO L93 Difference]: Finished difference Result 1640 states and 2403 transitions. [2022-03-20 17:47:53,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-03-20 17:47:53,704 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.275) internal successors, (91), 38 states have internal predecessors, (91), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 267 [2022-03-20 17:47:53,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:47:53,708 INFO L225 Difference]: With dead ends: 1640 [2022-03-20 17:47:53,708 INFO L226 Difference]: Without dead ends: 886 [2022-03-20 17:47:53,710 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 614 GetRequests, 501 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 982 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=5598, Invalid=7512, Unknown=0, NotChecked=0, Total=13110 [2022-03-20 17:47:53,710 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 2154 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 2018 mSolverCounterSat, 926 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s 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 [2022-03-20 17:47:53,710 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2158 Valid, 53 Invalid, 2944 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [926 Valid, 2018 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-03-20 17:47:53,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 886 states. [2022-03-20 17:47:53,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 886 to 854. [2022-03-20 17:47:53,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 854 states, 738 states have (on average 1.348238482384824) internal successors, (995), 738 states have internal predecessors, (995), 111 states have call successors, (111), 6 states have call predecessors, (111), 4 states have return successors, (109), 109 states have call predecessors, (109), 109 states have call successors, (109) [2022-03-20 17:47:53,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 854 states to 854 states and 1215 transitions. [2022-03-20 17:47:53,953 INFO L78 Accepts]: Start accepts. Automaton has 854 states and 1215 transitions. Word has length 267 [2022-03-20 17:47:53,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:47:53,953 INFO L478 AbstractCegarLoop]: Abstraction has 854 states and 1215 transitions. [2022-03-20 17:47:53,953 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.275) internal successors, (91), 38 states have internal predecessors, (91), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 17:47:53,954 INFO L276 IsEmpty]: Start isEmpty. Operand 854 states and 1215 transitions. [2022-03-20 17:47:53,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 275 [2022-03-20 17:47:53,956 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:47:53,956 INFO L499 BasicCegarLoop]: trace histogram [36, 36, 36, 36, 36, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:47:53,984 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-03-20 17:47:54,178 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-03-20 17:47:54,178 INFO L403 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:47:54,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:47:54,178 INFO L85 PathProgramCache]: Analyzing trace with hash 101824299, now seen corresponding path program 69 times [2022-03-20 17:47:54,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:47:54,179 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [916230720] [2022-03-20 17:47:54,180 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:47:54,180 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:47:54,180 INFO L85 PathProgramCache]: Analyzing trace with hash 101824299, now seen corresponding path program 70 times [2022-03-20 17:47:54,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:47:54,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523120962] [2022-03-20 17:47:54,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:47:54,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:47:54,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:47:54,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:47:54,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:47:54,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 259 [2022-03-20 17:47:54,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:47:54,756 INFO L134 CoverageAnalysis]: Checked inductivity of 4518 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 3222 trivial. 0 not checked. [2022-03-20 17:47:54,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:47:54,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523120962] [2022-03-20 17:47:54,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523120962] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:47:54,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [922295227] [2022-03-20 17:47:54,757 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 17:47:54,757 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:47:54,757 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:47:54,758 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 17:47:54,759 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-03-20 17:47:55,032 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 17:47:55,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:47:55,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 1046 conjuncts, 38 conjunts are in the unsatisfiable core [2022-03-20 17:47:55,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:47:55,358 INFO L134 CoverageAnalysis]: Checked inductivity of 4518 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 3222 trivial. 0 not checked. [2022-03-20 17:47:55,358 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:47:56,980 INFO L134 CoverageAnalysis]: Checked inductivity of 4518 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 3222 trivial. 0 not checked. [2022-03-20 17:47:56,981 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [922295227] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:47:56,981 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:47:56,981 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 39, 39] total 79 [2022-03-20 17:47:56,981 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:47:56,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [916230720] [2022-03-20 17:47:56,981 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [916230720] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:47:56,981 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:47:56,981 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2022-03-20 17:47:56,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583883305] [2022-03-20 17:47:56,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:47:56,982 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-20 17:47:56,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:47:56,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-20 17:47:56,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2930, Invalid=3232, Unknown=0, NotChecked=0, Total=6162 [2022-03-20 17:47:56,983 INFO L87 Difference]: Start difference. First operand 854 states and 1215 transitions. Second operand has 41 states, 41 states have (on average 2.268292682926829) internal successors, (93), 39 states have internal predecessors, (93), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 17:47:59,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:47:59,483 INFO L93 Difference]: Finished difference Result 1684 states and 2468 transitions. [2022-03-20 17:47:59,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-03-20 17:47:59,483 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.268292682926829) internal successors, (93), 39 states have internal predecessors, (93), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 274 [2022-03-20 17:47:59,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:47:59,486 INFO L225 Difference]: With dead ends: 1684 [2022-03-20 17:47:59,486 INFO L226 Difference]: Without dead ends: 909 [2022-03-20 17:47:59,488 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 630 GetRequests, 514 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1028 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=5901, Invalid=7905, Unknown=0, NotChecked=0, Total=13806 [2022-03-20 17:47:59,488 INFO L913 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, 1.3s IncrementalHoareTripleChecker+Time [2022-03-20 17:47:59,488 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2082 Valid, 53 Invalid, 3100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [940 Valid, 2160 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-03-20 17:47:59,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 909 states. [2022-03-20 17:47:59,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 909 to 877. [2022-03-20 17:47:59,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 877 states, 758 states have (on average 1.3482849604221636) internal successors, (1022), 758 states have internal predecessors, (1022), 114 states have call successors, (114), 6 states have call predecessors, (114), 4 states have return successors, (112), 112 states have call predecessors, (112), 112 states have call successors, (112) [2022-03-20 17:47:59,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 877 states to 877 states and 1248 transitions. [2022-03-20 17:47:59,731 INFO L78 Accepts]: Start accepts. Automaton has 877 states and 1248 transitions. Word has length 274 [2022-03-20 17:47:59,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:47:59,731 INFO L478 AbstractCegarLoop]: Abstraction has 877 states and 1248 transitions. [2022-03-20 17:47:59,731 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.268292682926829) internal successors, (93), 39 states have internal predecessors, (93), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 17:47:59,731 INFO L276 IsEmpty]: Start isEmpty. Operand 877 states and 1248 transitions. [2022-03-20 17:47:59,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 282 [2022-03-20 17:47:59,733 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:47:59,733 INFO L499 BasicCegarLoop]: trace histogram [37, 37, 37, 37, 37, 37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:47:59,752 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2022-03-20 17:47:59,934 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-03-20 17:47:59,934 INFO L403 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:47:59,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:47:59,934 INFO L85 PathProgramCache]: Analyzing trace with hash 31320897, now seen corresponding path program 71 times [2022-03-20 17:47:59,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:47:59,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1233839894] [2022-03-20 17:47:59,936 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:47:59,937 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:47:59,937 INFO L85 PathProgramCache]: Analyzing trace with hash 31320897, now seen corresponding path program 72 times [2022-03-20 17:47:59,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:47:59,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779032556] [2022-03-20 17:47:59,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:47:59,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:47:59,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:48:00,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:48:00,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:48:00,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 266 [2022-03-20 17:48:00,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:48:00,530 INFO L134 CoverageAnalysis]: Checked inductivity of 4773 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 3404 trivial. 0 not checked. [2022-03-20 17:48:00,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:48:00,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779032556] [2022-03-20 17:48:00,530 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779032556] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:48:00,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993961025] [2022-03-20 17:48:00,530 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 17:48:00,530 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:48:00,531 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:48:00,532 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 17:48:00,533 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-03-20 17:48:00,760 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 17:48:00,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:48:00,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 17:48:00,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:48:01,275 INFO L134 CoverageAnalysis]: Checked inductivity of 4773 backedges. 145 proven. 1 refuted. 0 times theorem prover too weak. 4627 trivial. 0 not checked. [2022-03-20 17:48:01,275 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:48:01,655 INFO L134 CoverageAnalysis]: Checked inductivity of 4773 backedges. 145 proven. 1 refuted. 0 times theorem prover too weak. 4627 trivial. 0 not checked. [2022-03-20 17:48:01,655 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1993961025] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:48:01,656 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:48:01,656 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 7, 7] total 50 [2022-03-20 17:48:01,656 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:48:01,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1233839894] [2022-03-20 17:48:01,656 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1233839894] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:48:01,656 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:48:01,656 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2022-03-20 17:48:01,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291289464] [2022-03-20 17:48:01,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:48:01,657 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-03-20 17:48:01,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:48:01,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-03-20 17:48:01,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=809, Invalid=1641, Unknown=0, NotChecked=0, Total=2450 [2022-03-20 17:48:01,658 INFO L87 Difference]: Start difference. First operand 877 states and 1248 transitions. Second operand has 42 states, 42 states have (on average 2.261904761904762) internal successors, (95), 40 states have internal predecessors, (95), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 17:48:04,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:48:04,275 INFO L93 Difference]: Finished difference Result 1728 states and 2533 transitions. [2022-03-20 17:48:04,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-03-20 17:48:04,275 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.261904761904762) internal successors, (95), 40 states have internal predecessors, (95), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 281 [2022-03-20 17:48:04,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:48:04,278 INFO L225 Difference]: With dead ends: 1728 [2022-03-20 17:48:04,278 INFO L226 Difference]: Without dead ends: 932 [2022-03-20 17:48:04,279 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 646 GetRequests, 557 SyntacticMatches, 1 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1233 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2452, Invalid=5558, Unknown=0, NotChecked=0, Total=8010 [2022-03-20 17:48:04,280 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 2011 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 2409 mSolverCounterSat, 841 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s 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 [2022-03-20 17:48:04,280 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2015 Valid, 57 Invalid, 3250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [841 Valid, 2409 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-03-20 17:48:04,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 932 states. [2022-03-20 17:48:04,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 932 to 900. [2022-03-20 17:48:04,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 900 states, 778 states have (on average 1.3483290488431876) internal successors, (1049), 778 states have internal predecessors, (1049), 117 states have call successors, (117), 6 states have call predecessors, (117), 4 states have return successors, (115), 115 states have call predecessors, (115), 115 states have call successors, (115) [2022-03-20 17:48:04,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 900 states to 900 states and 1281 transitions. [2022-03-20 17:48:04,532 INFO L78 Accepts]: Start accepts. Automaton has 900 states and 1281 transitions. Word has length 281 [2022-03-20 17:48:04,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:48:04,532 INFO L478 AbstractCegarLoop]: Abstraction has 900 states and 1281 transitions. [2022-03-20 17:48:04,532 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.261904761904762) internal successors, (95), 40 states have internal predecessors, (95), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 17:48:04,532 INFO L276 IsEmpty]: Start isEmpty. Operand 900 states and 1281 transitions. [2022-03-20 17:48:04,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 289 [2022-03-20 17:48:04,534 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:48:04,534 INFO L499 BasicCegarLoop]: trace histogram [38, 38, 38, 38, 38, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:48:04,552 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-03-20 17:48:04,735 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-03-20 17:48:04,735 INFO L403 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:48:04,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:48:04,735 INFO L85 PathProgramCache]: Analyzing trace with hash 252910063, now seen corresponding path program 73 times [2022-03-20 17:48:04,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:48:04,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1671917739] [2022-03-20 17:48:04,737 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:48:04,737 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:48:04,737 INFO L85 PathProgramCache]: Analyzing trace with hash 252910063, now seen corresponding path program 74 times [2022-03-20 17:48:04,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:48:04,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758686591] [2022-03-20 17:48:04,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:48:04,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:48:04,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:48:05,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:48:05,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:48:05,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 273 [2022-03-20 17:48:05,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:48:05,460 INFO L134 CoverageAnalysis]: Checked inductivity of 5035 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 3591 trivial. 0 not checked. [2022-03-20 17:48:05,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:48:05,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758686591] [2022-03-20 17:48:05,460 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758686591] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:48:05,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [934981356] [2022-03-20 17:48:05,461 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 17:48:05,461 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:48:05,461 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:48:05,462 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 17:48:05,464 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-03-20 17:48:05,780 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 17:48:05,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:48:05,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 1098 conjuncts, 40 conjunts are in the unsatisfiable core [2022-03-20 17:48:05,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:48:06,111 INFO L134 CoverageAnalysis]: Checked inductivity of 5035 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 3591 trivial. 0 not checked. [2022-03-20 17:48:06,111 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:48:07,866 INFO L134 CoverageAnalysis]: Checked inductivity of 5035 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 3591 trivial. 0 not checked. [2022-03-20 17:48:07,866 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [934981356] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:48:07,867 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:48:07,867 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 41, 41] total 83 [2022-03-20 17:48:07,867 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:48:07,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1671917739] [2022-03-20 17:48:07,867 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1671917739] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:48:07,867 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:48:07,867 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2022-03-20 17:48:07,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624236476] [2022-03-20 17:48:07,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:48:07,867 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-03-20 17:48:07,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:48:07,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-03-20 17:48:07,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3244, Invalid=3562, Unknown=0, NotChecked=0, Total=6806 [2022-03-20 17:48:07,869 INFO L87 Difference]: Start difference. First operand 900 states and 1281 transitions. Second operand has 43 states, 43 states have (on average 2.255813953488372) internal successors, (97), 41 states have internal predecessors, (97), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 17:48:10,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:48:10,550 INFO L93 Difference]: Finished difference Result 1772 states and 2598 transitions. [2022-03-20 17:48:10,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-03-20 17:48:10,550 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.255813953488372) internal successors, (97), 41 states have internal predecessors, (97), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 288 [2022-03-20 17:48:10,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:48:10,553 INFO L225 Difference]: With dead ends: 1772 [2022-03-20 17:48:10,553 INFO L226 Difference]: Without dead ends: 955 [2022-03-20 17:48:10,555 INFO L912 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 [2022-03-20 17:48:10,555 INFO L913 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 [2022-03-20 17:48:10,555 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2139 Valid, 51 Invalid, 3121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [875 Valid, 2246 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-03-20 17:48:10,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 955 states. [2022-03-20 17:48:10,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 955 to 923. [2022-03-20 17:48:10,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 923 states, 798 states have (on average 1.3483709273182958) internal successors, (1076), 798 states have internal predecessors, (1076), 120 states have call successors, (120), 6 states have call predecessors, (120), 4 states have return successors, (118), 118 states have call predecessors, (118), 118 states have call successors, (118) [2022-03-20 17:48:10,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 923 states to 923 states and 1314 transitions. [2022-03-20 17:48:10,818 INFO L78 Accepts]: Start accepts. Automaton has 923 states and 1314 transitions. Word has length 288 [2022-03-20 17:48:10,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:48:10,818 INFO L478 AbstractCegarLoop]: Abstraction has 923 states and 1314 transitions. [2022-03-20 17:48:10,819 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.255813953488372) internal successors, (97), 41 states have internal predecessors, (97), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 17:48:10,819 INFO L276 IsEmpty]: Start isEmpty. Operand 923 states and 1314 transitions. [2022-03-20 17:48:10,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 296 [2022-03-20 17:48:10,822 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:48:10,822 INFO L499 BasicCegarLoop]: trace histogram [39, 39, 39, 39, 39, 39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:48:10,849 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-03-20 17:48:11,046 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2022-03-20 17:48:11,047 INFO L403 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:48:11,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:48:11,047 INFO L85 PathProgramCache]: Analyzing trace with hash -1967344003, now seen corresponding path program 75 times [2022-03-20 17:48:11,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:48:11,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [985861900] [2022-03-20 17:48:11,049 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:48:11,049 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:48:11,049 INFO L85 PathProgramCache]: Analyzing trace with hash -1967344003, now seen corresponding path program 76 times [2022-03-20 17:48:11,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:48:11,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750587229] [2022-03-20 17:48:11,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:48:11,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:48:11,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:48:11,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:48:11,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:48:11,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 280 [2022-03-20 17:48:11,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:48:11,723 INFO L134 CoverageAnalysis]: Checked inductivity of 5304 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 3783 trivial. 0 not checked. [2022-03-20 17:48:11,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:48:11,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750587229] [2022-03-20 17:48:11,723 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750587229] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:48:11,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1831202814] [2022-03-20 17:48:11,724 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 17:48:11,724 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:48:11,724 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:48:11,728 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 17:48:11,729 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-03-20 17:48:12,030 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 17:48:12,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:48:12,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 1124 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-20 17:48:12,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:48:12,366 INFO L134 CoverageAnalysis]: Checked inductivity of 5304 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 3783 trivial. 0 not checked. [2022-03-20 17:48:12,366 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:48:14,202 INFO L134 CoverageAnalysis]: Checked inductivity of 5304 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 3783 trivial. 0 not checked. [2022-03-20 17:48:14,202 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1831202814] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:48:14,202 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:48:14,202 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 42, 42] total 85 [2022-03-20 17:48:14,203 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:48:14,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [985861900] [2022-03-20 17:48:14,203 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [985861900] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:48:14,203 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:48:14,203 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2022-03-20 17:48:14,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054551529] [2022-03-20 17:48:14,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:48:14,203 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-03-20 17:48:14,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:48:14,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-03-20 17:48:14,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3407, Invalid=3733, Unknown=0, NotChecked=0, Total=7140 [2022-03-20 17:48:14,204 INFO L87 Difference]: Start difference. First operand 923 states and 1314 transitions. Second operand has 44 states, 44 states have (on average 2.25) internal successors, (99), 42 states have internal predecessors, (99), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 17:48:17,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:48:17,017 INFO L93 Difference]: Finished difference Result 1816 states and 2663 transitions. [2022-03-20 17:48:17,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-03-20 17:48:17,017 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.25) internal successors, (99), 42 states have internal predecessors, (99), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 295 [2022-03-20 17:48:17,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:48:17,021 INFO L225 Difference]: With dead ends: 1816 [2022-03-20 17:48:17,021 INFO L226 Difference]: Without dead ends: 978 [2022-03-20 17:48:17,023 INFO L912 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 [2022-03-20 17:48:17,024 INFO L913 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, 1.4s IncrementalHoareTripleChecker+Time [2022-03-20 17:48:17,024 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2341 Valid, 49 Invalid, 3420 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1083 Valid, 2337 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-03-20 17:48:17,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 978 states. [2022-03-20 17:48:17,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 978 to 946. [2022-03-20 17:48:17,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 946 states, 818 states have (on average 1.3484107579462103) internal successors, (1103), 818 states have internal predecessors, (1103), 123 states have call successors, (123), 6 states have call predecessors, (123), 4 states have return successors, (121), 121 states have call predecessors, (121), 121 states have call successors, (121) [2022-03-20 17:48:17,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 946 states to 946 states and 1347 transitions. [2022-03-20 17:48:17,302 INFO L78 Accepts]: Start accepts. Automaton has 946 states and 1347 transitions. Word has length 295 [2022-03-20 17:48:17,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:48:17,302 INFO L478 AbstractCegarLoop]: Abstraction has 946 states and 1347 transitions. [2022-03-20 17:48:17,303 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.25) internal successors, (99), 42 states have internal predecessors, (99), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 17:48:17,303 INFO L276 IsEmpty]: Start isEmpty. Operand 946 states and 1347 transitions. [2022-03-20 17:48:17,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 303 [2022-03-20 17:48:17,305 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:48:17,305 INFO L499 BasicCegarLoop]: trace histogram [40, 40, 40, 40, 40, 40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:48:17,323 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2022-03-20 17:48:17,505 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2022-03-20 17:48:17,505 INFO L403 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:48:17,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:48:17,506 INFO L85 PathProgramCache]: Analyzing trace with hash 596373683, now seen corresponding path program 77 times [2022-03-20 17:48:17,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:48:17,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [124666107] [2022-03-20 17:48:17,507 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:48:17,507 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:48:17,508 INFO L85 PathProgramCache]: Analyzing trace with hash 596373683, now seen corresponding path program 78 times [2022-03-20 17:48:17,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:48:17,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266563188] [2022-03-20 17:48:17,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:48:17,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:48:17,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:48:18,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:48:18,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:48:18,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 287 [2022-03-20 17:48:18,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:48:18,243 INFO L134 CoverageAnalysis]: Checked inductivity of 5580 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 3980 trivial. 0 not checked. [2022-03-20 17:48:18,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:48:18,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266563188] [2022-03-20 17:48:18,244 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266563188] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:48:18,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025970128] [2022-03-20 17:48:18,244 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 17:48:18,244 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:48:18,244 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:48:18,245 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 17:48:18,246 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-03-20 17:48:18,495 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 17:48:18,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:48:18,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 17:48:18,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:48:18,922 INFO L134 CoverageAnalysis]: Checked inductivity of 5580 backedges. 157 proven. 1 refuted. 0 times theorem prover too weak. 5422 trivial. 0 not checked. [2022-03-20 17:48:18,922 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:48:19,326 INFO L134 CoverageAnalysis]: Checked inductivity of 5580 backedges. 157 proven. 1 refuted. 0 times theorem prover too weak. 5422 trivial. 0 not checked. [2022-03-20 17:48:19,326 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1025970128] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:48:19,326 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:48:19,326 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 7, 7] total 53 [2022-03-20 17:48:19,327 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:48:19,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [124666107] [2022-03-20 17:48:19,327 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [124666107] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:48:19,327 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:48:19,327 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2022-03-20 17:48:19,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441355051] [2022-03-20 17:48:19,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:48:19,327 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-03-20 17:48:19,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:48:19,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-03-20 17:48:19,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=932, Invalid=1824, Unknown=0, NotChecked=0, Total=2756 [2022-03-20 17:48:19,328 INFO L87 Difference]: Start difference. First operand 946 states and 1347 transitions. Second operand has 45 states, 45 states have (on average 2.2444444444444445) internal successors, (101), 43 states have internal predecessors, (101), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 17:48:22,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:48:22,245 INFO L93 Difference]: Finished difference Result 1860 states and 2728 transitions. [2022-03-20 17:48:22,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-03-20 17:48:22,246 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.2444444444444445) internal successors, (101), 43 states have internal predecessors, (101), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 302 [2022-03-20 17:48:22,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:48:22,249 INFO L225 Difference]: With dead ends: 1860 [2022-03-20 17:48:22,249 INFO L226 Difference]: Without dead ends: 1001 [2022-03-20 17:48:22,250 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 694 GetRequests, 599 SyntacticMatches, 1 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1392 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2827, Invalid=6293, Unknown=0, NotChecked=0, Total=9120 [2022-03-20 17:48:22,251 INFO L913 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 [2022-03-20 17:48:22,251 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2441 Valid, 55 Invalid, 3570 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1098 Valid, 2472 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-03-20 17:48:22,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1001 states. [2022-03-20 17:48:22,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1001 to 969. [2022-03-20 17:48:22,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 969 states, 838 states have (on average 1.3484486873508352) internal successors, (1130), 838 states have internal predecessors, (1130), 126 states have call successors, (126), 6 states have call predecessors, (126), 4 states have return successors, (124), 124 states have call predecessors, (124), 124 states have call successors, (124) [2022-03-20 17:48:22,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 969 states to 969 states and 1380 transitions. [2022-03-20 17:48:22,540 INFO L78 Accepts]: Start accepts. Automaton has 969 states and 1380 transitions. Word has length 302 [2022-03-20 17:48:22,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:48:22,540 INFO L478 AbstractCegarLoop]: Abstraction has 969 states and 1380 transitions. [2022-03-20 17:48:22,540 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.2444444444444445) internal successors, (101), 43 states have internal predecessors, (101), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 17:48:22,541 INFO L276 IsEmpty]: Start isEmpty. Operand 969 states and 1380 transitions. [2022-03-20 17:48:22,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 310 [2022-03-20 17:48:22,543 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:48:22,543 INFO L499 BasicCegarLoop]: trace histogram [41, 41, 41, 41, 41, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:48:22,560 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-03-20 17:48:22,744 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2022-03-20 17:48:22,744 INFO L403 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:48:22,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:48:22,744 INFO L85 PathProgramCache]: Analyzing trace with hash 1015311801, now seen corresponding path program 79 times [2022-03-20 17:48:22,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:48:22,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1668924752] [2022-03-20 17:48:22,746 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:48:22,746 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:48:22,746 INFO L85 PathProgramCache]: Analyzing trace with hash 1015311801, now seen corresponding path program 80 times [2022-03-20 17:48:22,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:48:22,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229720377] [2022-03-20 17:48:22,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:48:22,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:48:22,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:48:23,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:48:23,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:48:23,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 294 [2022-03-20 17:48:23,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:48:23,492 INFO L134 CoverageAnalysis]: Checked inductivity of 5863 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 4182 trivial. 0 not checked. [2022-03-20 17:48:23,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:48:23,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229720377] [2022-03-20 17:48:23,493 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229720377] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:48:23,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569143369] [2022-03-20 17:48:23,493 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 17:48:23,493 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:48:23,493 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:48:23,494 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 17:48:23,495 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-03-20 17:48:23,835 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 17:48:23,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:48:23,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 1176 conjuncts, 43 conjunts are in the unsatisfiable core [2022-03-20 17:48:23,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:48:24,213 INFO L134 CoverageAnalysis]: Checked inductivity of 5863 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 4182 trivial. 0 not checked. [2022-03-20 17:48:24,214 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:48:26,188 INFO L134 CoverageAnalysis]: Checked inductivity of 5863 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 4182 trivial. 0 not checked. [2022-03-20 17:48:26,188 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1569143369] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:48:26,188 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:48:26,188 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 44, 44] total 89 [2022-03-20 17:48:26,188 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:48:26,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1668924752] [2022-03-20 17:48:26,189 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1668924752] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:48:26,189 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:48:26,189 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2022-03-20 17:48:26,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174571107] [2022-03-20 17:48:26,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:48:26,189 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-03-20 17:48:26,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:48:26,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-03-20 17:48:26,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3745, Invalid=4087, Unknown=0, NotChecked=0, Total=7832 [2022-03-20 17:48:26,191 INFO L87 Difference]: Start difference. First operand 969 states and 1380 transitions. Second operand has 46 states, 46 states have (on average 2.239130434782609) internal successors, (103), 44 states have internal predecessors, (103), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 17:48:29,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:48:29,288 INFO L93 Difference]: Finished difference Result 1904 states and 2793 transitions. [2022-03-20 17:48:29,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-03-20 17:48:29,288 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.239130434782609) internal successors, (103), 44 states have internal predecessors, (103), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 309 [2022-03-20 17:48:29,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:48:29,292 INFO L225 Difference]: With dead ends: 1904 [2022-03-20 17:48:29,292 INFO L226 Difference]: Without dead ends: 1024 [2022-03-20 17:48:29,294 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 710 GetRequests, 579 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1273 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=7536, Invalid=10020, Unknown=0, NotChecked=0, Total=17556 [2022-03-20 17:48:29,294 INFO L913 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 [2022-03-20 17:48:29,295 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2446 Valid, 49 Invalid, 3759 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1181 Valid, 2578 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-03-20 17:48:29,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1024 states. [2022-03-20 17:48:29,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1024 to 992. [2022-03-20 17:48:29,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 992 states, 858 states have (on average 1.3484848484848484) internal successors, (1157), 858 states have internal predecessors, (1157), 129 states have call successors, (129), 6 states have call predecessors, (129), 4 states have return successors, (127), 127 states have call predecessors, (127), 127 states have call successors, (127) [2022-03-20 17:48:29,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 992 states to 992 states and 1413 transitions. [2022-03-20 17:48:29,601 INFO L78 Accepts]: Start accepts. Automaton has 992 states and 1413 transitions. Word has length 309 [2022-03-20 17:48:29,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:48:29,601 INFO L478 AbstractCegarLoop]: Abstraction has 992 states and 1413 transitions. [2022-03-20 17:48:29,602 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.239130434782609) internal successors, (103), 44 states have internal predecessors, (103), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 17:48:29,602 INFO L276 IsEmpty]: Start isEmpty. Operand 992 states and 1413 transitions. [2022-03-20 17:48:29,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 317 [2022-03-20 17:48:29,605 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:48:29,605 INFO L499 BasicCegarLoop]: trace histogram [42, 42, 42, 42, 42, 42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:48:29,633 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-03-20 17:48:29,819 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:48:29,819 INFO L403 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:48:29,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:48:29,820 INFO L85 PathProgramCache]: Analyzing trace with hash 1062959991, now seen corresponding path program 81 times [2022-03-20 17:48:29,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:48:29,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [848501564] [2022-03-20 17:48:29,822 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:48:29,822 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:48:29,822 INFO L85 PathProgramCache]: Analyzing trace with hash 1062959991, now seen corresponding path program 82 times [2022-03-20 17:48:29,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:48:29,822 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514030200] [2022-03-20 17:48:29,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:48:29,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:48:29,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:48:30,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:48:30,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:48:30,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 301 [2022-03-20 17:48:30,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:48:30,677 INFO L134 CoverageAnalysis]: Checked inductivity of 6153 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 4389 trivial. 0 not checked. [2022-03-20 17:48:30,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:48:30,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514030200] [2022-03-20 17:48:30,677 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514030200] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:48:30,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951869403] [2022-03-20 17:48:30,677 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 17:48:30,678 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:48:30,678 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:48:30,679 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 17:48:30,681 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-03-20 17:48:31,018 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 17:48:31,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:48:31,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 1202 conjuncts, 44 conjunts are in the unsatisfiable core [2022-03-20 17:48:31,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:48:31,432 INFO L134 CoverageAnalysis]: Checked inductivity of 6153 backedges. 0 proven. 4388 refuted. 0 times theorem prover too weak. 1765 trivial. 0 not checked. [2022-03-20 17:48:31,432 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:48:33,512 INFO L134 CoverageAnalysis]: Checked inductivity of 6153 backedges. 0 proven. 4388 refuted. 0 times theorem prover too weak. 1765 trivial. 0 not checked. [2022-03-20 17:48:33,512 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1951869403] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:48:33,512 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:48:33,512 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 45, 45] total 91 [2022-03-20 17:48:33,512 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:48:33,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [848501564] [2022-03-20 17:48:33,513 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [848501564] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:48:33,513 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:48:33,513 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2022-03-20 17:48:33,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618074697] [2022-03-20 17:48:33,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:48:33,513 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-03-20 17:48:33,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:48:33,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-03-20 17:48:33,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3920, Invalid=4270, Unknown=0, NotChecked=0, Total=8190 [2022-03-20 17:48:33,515 INFO L87 Difference]: Start difference. First operand 992 states and 1413 transitions. Second operand has 47 states, 47 states have (on average 2.234042553191489) internal successors, (105), 45 states have internal predecessors, (105), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 17:48:36,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:48:36,585 INFO L93 Difference]: Finished difference Result 1948 states and 2858 transitions. [2022-03-20 17:48:36,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-03-20 17:48:36,587 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.234042553191489) internal successors, (105), 45 states have internal predecessors, (105), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 316 [2022-03-20 17:48:36,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:48:36,591 INFO L225 Difference]: With dead ends: 1948 [2022-03-20 17:48:36,591 INFO L226 Difference]: Without dead ends: 1047 [2022-03-20 17:48:36,593 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 726 GetRequests, 592 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1325 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=7887, Invalid=10473, Unknown=0, NotChecked=0, Total=18360 [2022-03-20 17:48:36,593 INFO L913 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 [2022-03-20 17:48:36,593 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2362 Valid, 55 Invalid, 3507 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1045 Valid, 2462 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-03-20 17:48:36,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1047 states. [2022-03-20 17:48:36,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1047 to 1015. [2022-03-20 17:48:36,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1015 states, 878 states have (on average 1.3485193621867881) internal successors, (1184), 878 states have internal predecessors, (1184), 132 states have call successors, (132), 6 states have call predecessors, (132), 4 states have return successors, (130), 130 states have call predecessors, (130), 130 states have call successors, (130) [2022-03-20 17:48:36,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1015 states to 1015 states and 1446 transitions. [2022-03-20 17:48:36,901 INFO L78 Accepts]: Start accepts. Automaton has 1015 states and 1446 transitions. Word has length 316 [2022-03-20 17:48:36,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:48:36,901 INFO L478 AbstractCegarLoop]: Abstraction has 1015 states and 1446 transitions. [2022-03-20 17:48:36,902 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.234042553191489) internal successors, (105), 45 states have internal predecessors, (105), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 17:48:36,902 INFO L276 IsEmpty]: Start isEmpty. Operand 1015 states and 1446 transitions. [2022-03-20 17:48:36,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 324 [2022-03-20 17:48:36,904 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:48:36,904 INFO L499 BasicCegarLoop]: trace histogram [43, 43, 43, 43, 43, 43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:48:36,923 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2022-03-20 17:48:37,104 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:48:37,104 INFO L403 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:48:37,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:48:37,105 INFO L85 PathProgramCache]: Analyzing trace with hash -577384203, now seen corresponding path program 83 times [2022-03-20 17:48:37,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:48:37,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [287584793] [2022-03-20 17:48:37,106 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:48:37,107 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:48:37,107 INFO L85 PathProgramCache]: Analyzing trace with hash -577384203, now seen corresponding path program 84 times [2022-03-20 17:48:37,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:48:37,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464114534] [2022-03-20 17:48:37,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:48:37,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:48:37,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:48:37,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:48:37,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:48:37,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 308 [2022-03-20 17:48:37,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:48:37,917 INFO L134 CoverageAnalysis]: Checked inductivity of 6450 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 4601 trivial. 0 not checked. [2022-03-20 17:48:37,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:48:37,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464114534] [2022-03-20 17:48:37,918 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464114534] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:48:37,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1960334489] [2022-03-20 17:48:37,918 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 17:48:37,918 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:48:37,918 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:48:37,919 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 17:48:37,920 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-03-20 17:48:38,181 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 17:48:38,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:48:38,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 17:48:38,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:48:38,611 INFO L134 CoverageAnalysis]: Checked inductivity of 6450 backedges. 169 proven. 1 refuted. 0 times theorem prover too weak. 6280 trivial. 0 not checked. [2022-03-20 17:48:38,611 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:48:39,019 INFO L134 CoverageAnalysis]: Checked inductivity of 6450 backedges. 169 proven. 1 refuted. 0 times theorem prover too weak. 6280 trivial. 0 not checked. [2022-03-20 17:48:39,019 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1960334489] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:48:39,019 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:48:39,020 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 7, 7] total 56 [2022-03-20 17:48:39,020 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:48:39,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [287584793] [2022-03-20 17:48:39,020 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [287584793] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:48:39,020 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:48:39,020 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [] total 48 [2022-03-20 17:48:39,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840033162] [2022-03-20 17:48:39,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:48:39,020 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-03-20 17:48:39,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:48:39,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-03-20 17:48:39,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1064, Invalid=2016, Unknown=0, NotChecked=0, Total=3080 [2022-03-20 17:48:39,022 INFO L87 Difference]: Start difference. First operand 1015 states and 1446 transitions. Second operand has 48 states, 48 states have (on average 2.2291666666666665) internal successors, (107), 46 states have internal predecessors, (107), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 17:48:42,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:48:42,263 INFO L93 Difference]: Finished difference Result 1992 states and 2923 transitions. [2022-03-20 17:48:42,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-03-20 17:48:42,264 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.2291666666666665) internal successors, (107), 46 states have internal predecessors, (107), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 323 [2022-03-20 17:48:42,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:48:42,268 INFO L225 Difference]: With dead ends: 1992 [2022-03-20 17:48:42,268 INFO L226 Difference]: Without dead ends: 1070 [2022-03-20 17:48:42,270 INFO L912 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 [2022-03-20 17:48:42,271 INFO L913 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 [2022-03-20 17:48:42,271 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2797 Valid, 51 Invalid, 3775 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1274 Valid, 2501 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-03-20 17:48:42,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1070 states. [2022-03-20 17:48:42,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1070 to 1038. [2022-03-20 17:48:42,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1038 states, 898 states have (on average 1.3485523385300668) internal successors, (1211), 898 states have internal predecessors, (1211), 135 states have call successors, (135), 6 states have call predecessors, (135), 4 states have return successors, (133), 133 states have call predecessors, (133), 133 states have call successors, (133) [2022-03-20 17:48:42,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1038 states to 1038 states and 1479 transitions. [2022-03-20 17:48:42,603 INFO L78 Accepts]: Start accepts. Automaton has 1038 states and 1479 transitions. Word has length 323 [2022-03-20 17:48:42,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:48:42,603 INFO L478 AbstractCegarLoop]: Abstraction has 1038 states and 1479 transitions. [2022-03-20 17:48:42,603 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.2291666666666665) internal successors, (107), 46 states have internal predecessors, (107), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 17:48:42,604 INFO L276 IsEmpty]: Start isEmpty. Operand 1038 states and 1479 transitions. [2022-03-20 17:48:42,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2022-03-20 17:48:42,607 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:48:42,607 INFO L499 BasicCegarLoop]: trace histogram [44, 44, 44, 44, 44, 44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:48:42,632 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-03-20 17:48:42,831 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-03-20 17:48:42,832 INFO L403 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:48:42,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:48:42,832 INFO L85 PathProgramCache]: Analyzing trace with hash -2099185093, now seen corresponding path program 85 times [2022-03-20 17:48:42,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:48:42,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [970255169] [2022-03-20 17:48:42,834 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:48:42,834 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:48:42,834 INFO L85 PathProgramCache]: Analyzing trace with hash -2099185093, now seen corresponding path program 86 times [2022-03-20 17:48:42,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:48:42,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353729929] [2022-03-20 17:48:42,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:48:42,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:48:42,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:48:43,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:48:43,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:48:43,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 315 [2022-03-20 17:48:43,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:48:43,624 INFO L134 CoverageAnalysis]: Checked inductivity of 6754 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 4818 trivial. 0 not checked. [2022-03-20 17:48:43,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:48:43,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353729929] [2022-03-20 17:48:43,639 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353729929] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:48:43,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176623212] [2022-03-20 17:48:43,639 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 17:48:43,639 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:48:43,639 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:48:43,640 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 17:48:43,641 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-03-20 17:48:43,989 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 17:48:43,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:48:43,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 1254 conjuncts, 46 conjunts are in the unsatisfiable core [2022-03-20 17:48:43,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:48:44,373 INFO L134 CoverageAnalysis]: Checked inductivity of 6754 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 4818 trivial. 0 not checked. [2022-03-20 17:48:44,374 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:48:46,603 INFO L134 CoverageAnalysis]: Checked inductivity of 6754 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 4818 trivial. 0 not checked. [2022-03-20 17:48:46,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [176623212] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:48:46,604 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:48:46,604 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 47, 47] total 95 [2022-03-20 17:48:46,604 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:48:46,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [970255169] [2022-03-20 17:48:46,604 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [970255169] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:48:46,604 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:48:46,604 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [49] imperfect sequences [] total 49 [2022-03-20 17:48:46,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46483892] [2022-03-20 17:48:46,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:48:46,604 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-03-20 17:48:46,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:48:46,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-03-20 17:48:46,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4282, Invalid=4648, Unknown=0, NotChecked=0, Total=8930 [2022-03-20 17:48:46,606 INFO L87 Difference]: Start difference. First operand 1038 states and 1479 transitions. Second operand has 49 states, 49 states have (on average 2.2244897959183674) internal successors, (109), 47 states have internal predecessors, (109), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 17:48:50,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:48:50,045 INFO L93 Difference]: Finished difference Result 2036 states and 2988 transitions. [2022-03-20 17:48:50,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-03-20 17:48:50,045 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.2244897959183674) internal successors, (109), 47 states have internal predecessors, (109), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 330 [2022-03-20 17:48:50,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:48:50,049 INFO L225 Difference]: With dead ends: 2036 [2022-03-20 17:48:50,049 INFO L226 Difference]: Without dead ends: 1093 [2022-03-20 17:48:50,052 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 758 GetRequests, 618 SyntacticMatches, 0 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1432 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=8613, Invalid=11409, Unknown=0, NotChecked=0, Total=20022 [2022-03-20 17:48:50,052 INFO L913 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 [2022-03-20 17:48:50,053 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2440 Valid, 59 Invalid, 3844 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1053 Valid, 2791 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-03-20 17:48:50,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1093 states. [2022-03-20 17:48:50,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1093 to 1061. [2022-03-20 17:48:50,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1061 states, 918 states have (on average 1.3485838779956427) internal successors, (1238), 918 states have internal predecessors, (1238), 138 states have call successors, (138), 6 states have call predecessors, (138), 4 states have return successors, (136), 136 states have call predecessors, (136), 136 states have call successors, (136) [2022-03-20 17:48:50,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1061 states to 1061 states and 1512 transitions. [2022-03-20 17:48:50,554 INFO L78 Accepts]: Start accepts. Automaton has 1061 states and 1512 transitions. Word has length 330 [2022-03-20 17:48:50,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:48:50,554 INFO L478 AbstractCegarLoop]: Abstraction has 1061 states and 1512 transitions. [2022-03-20 17:48:50,554 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.2244897959183674) internal successors, (109), 47 states have internal predecessors, (109), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 17:48:50,555 INFO L276 IsEmpty]: Start isEmpty. Operand 1061 states and 1512 transitions. [2022-03-20 17:48:50,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 338 [2022-03-20 17:48:50,557 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:48:50,557 INFO L499 BasicCegarLoop]: trace histogram [45, 45, 45, 45, 45, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:48:50,576 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2022-03-20 17:48:50,758 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-03-20 17:48:50,758 INFO L403 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:48:50,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:48:50,759 INFO L85 PathProgramCache]: Analyzing trace with hash 1037148209, now seen corresponding path program 87 times [2022-03-20 17:48:50,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:48:50,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [9864957] [2022-03-20 17:48:50,760 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:48:50,760 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:48:50,761 INFO L85 PathProgramCache]: Analyzing trace with hash 1037148209, now seen corresponding path program 88 times [2022-03-20 17:48:50,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:48:50,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257361112] [2022-03-20 17:48:50,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:48:50,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:48:50,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:48:51,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:48:51,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:48:51,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 322 [2022-03-20 17:48:51,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:48:51,591 INFO L134 CoverageAnalysis]: Checked inductivity of 7065 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 5040 trivial. 0 not checked. [2022-03-20 17:48:51,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:48:51,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257361112] [2022-03-20 17:48:51,591 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257361112] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:48:51,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394186327] [2022-03-20 17:48:51,591 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 17:48:51,591 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:48:51,592 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:48:51,597 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 17:48:51,598 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-03-20 17:48:51,957 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 17:48:51,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:48:51,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 1280 conjuncts, 47 conjunts are in the unsatisfiable core [2022-03-20 17:48:51,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:48:52,341 INFO L134 CoverageAnalysis]: Checked inductivity of 7065 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 5040 trivial. 0 not checked. [2022-03-20 17:48:52,342 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:48:54,700 INFO L134 CoverageAnalysis]: Checked inductivity of 7065 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 5040 trivial. 0 not checked. [2022-03-20 17:48:54,701 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [394186327] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:48:54,701 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:48:54,701 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 48, 48] total 97 [2022-03-20 17:48:54,701 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:48:54,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [9864957] [2022-03-20 17:48:54,701 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [9864957] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:48:54,701 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:48:54,701 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2022-03-20 17:48:54,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182438636] [2022-03-20 17:48:54,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:48:54,702 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-03-20 17:48:54,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:48:54,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-03-20 17:48:54,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4469, Invalid=4843, Unknown=0, NotChecked=0, Total=9312 [2022-03-20 17:48:54,703 INFO L87 Difference]: Start difference. First operand 1061 states and 1512 transitions. Second operand has 50 states, 50 states have (on average 2.22) internal successors, (111), 48 states have internal predecessors, (111), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 17:48:58,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:48:58,364 INFO L93 Difference]: Finished difference Result 2080 states and 3053 transitions. [2022-03-20 17:48:58,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-03-20 17:48:58,365 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.22) internal successors, (111), 48 states have internal predecessors, (111), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 337 [2022-03-20 17:48:58,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:48:58,368 INFO L225 Difference]: With dead ends: 2080 [2022-03-20 17:48:58,368 INFO L226 Difference]: Without dead ends: 1116 [2022-03-20 17:48:58,370 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 774 GetRequests, 631 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1487 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=8988, Invalid=11892, Unknown=0, NotChecked=0, Total=20880 [2022-03-20 17:48:58,371 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 2617 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 2754 mSolverCounterSat, 1170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2621 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 3924 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1170 IncrementalHoareTripleChecker+Valid, 2754 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-03-20 17:48:58,371 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2621 Valid, 55 Invalid, 3924 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1170 Valid, 2754 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-03-20 17:48:58,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1116 states. [2022-03-20 17:48:58,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1116 to 1084. [2022-03-20 17:48:58,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1084 states, 938 states have (on average 1.3486140724946696) internal successors, (1265), 938 states have internal predecessors, (1265), 141 states have call successors, (141), 6 states have call predecessors, (141), 4 states have return successors, (139), 139 states have call predecessors, (139), 139 states have call successors, (139) [2022-03-20 17:48:58,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1084 states to 1084 states and 1545 transitions. [2022-03-20 17:48:58,749 INFO L78 Accepts]: Start accepts. Automaton has 1084 states and 1545 transitions. Word has length 337 [2022-03-20 17:48:58,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:48:58,749 INFO L478 AbstractCegarLoop]: Abstraction has 1084 states and 1545 transitions. [2022-03-20 17:48:58,749 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.22) internal successors, (111), 48 states have internal predecessors, (111), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 17:48:58,749 INFO L276 IsEmpty]: Start isEmpty. Operand 1084 states and 1545 transitions. [2022-03-20 17:48:58,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 345 [2022-03-20 17:48:58,751 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:48:58,752 INFO L499 BasicCegarLoop]: trace histogram [46, 46, 46, 46, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:48:58,771 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-03-20 17:48:58,952 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2022-03-20 17:48:58,952 INFO L403 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:48:58,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:48:58,953 INFO L85 PathProgramCache]: Analyzing trace with hash -688149249, now seen corresponding path program 89 times [2022-03-20 17:48:58,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:48:58,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1548382175] [2022-03-20 17:48:58,954 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:48:58,954 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:48:58,954 INFO L85 PathProgramCache]: Analyzing trace with hash -688149249, now seen corresponding path program 90 times [2022-03-20 17:48:58,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:48:58,954 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858202862] [2022-03-20 17:48:58,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:48:58,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:48:59,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:48:59,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:48:59,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:48:59,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 329 [2022-03-20 17:48:59,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:48:59,865 INFO L134 CoverageAnalysis]: Checked inductivity of 7383 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 5267 trivial. 0 not checked. [2022-03-20 17:48:59,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:48:59,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858202862] [2022-03-20 17:48:59,866 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858202862] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:48:59,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982880618] [2022-03-20 17:48:59,866 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 17:48:59,866 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:48:59,866 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:48:59,867 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 17:48:59,869 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-03-20 17:49:00,151 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 17:49:00,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:49:00,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 17:49:00,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:49:00,603 INFO L134 CoverageAnalysis]: Checked inductivity of 7383 backedges. 181 proven. 1 refuted. 0 times theorem prover too weak. 7201 trivial. 0 not checked. [2022-03-20 17:49:00,603 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:49:01,024 INFO L134 CoverageAnalysis]: Checked inductivity of 7383 backedges. 181 proven. 1 refuted. 0 times theorem prover too weak. 7201 trivial. 0 not checked. [2022-03-20 17:49:01,025 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1982880618] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:49:01,025 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:49:01,025 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 7, 7] total 59 [2022-03-20 17:49:01,025 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:49:01,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1548382175] [2022-03-20 17:49:01,025 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1548382175] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:49:01,025 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:49:01,025 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [51] imperfect sequences [] total 51 [2022-03-20 17:49:01,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156689409] [2022-03-20 17:49:01,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:49:01,026 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-03-20 17:49:01,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:49:01,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-03-20 17:49:01,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1205, Invalid=2217, Unknown=0, NotChecked=0, Total=3422 [2022-03-20 17:49:01,027 INFO L87 Difference]: Start difference. First operand 1084 states and 1545 transitions. Second operand has 51 states, 51 states have (on average 2.215686274509804) internal successors, (113), 49 states have internal predecessors, (113), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 17:49:04,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:49:04,508 INFO L93 Difference]: Finished difference Result 2124 states and 3118 transitions. [2022-03-20 17:49:04,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-03-20 17:49:04,508 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.215686274509804) internal successors, (113), 49 states have internal predecessors, (113), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 344 [2022-03-20 17:49:04,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:49:04,511 INFO L225 Difference]: With dead ends: 2124 [2022-03-20 17:49:04,511 INFO L226 Difference]: Without dead ends: 1139 [2022-03-20 17:49:04,513 INFO L912 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 [2022-03-20 17:49:04,513 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 2873 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 2684 mSolverCounterSat, 1231 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s 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, 1.6s IncrementalHoareTripleChecker+Time [2022-03-20 17:49:04,513 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2877 Valid, 59 Invalid, 3915 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1231 Valid, 2684 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-03-20 17:49:04,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1139 states. [2022-03-20 17:49:04,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1139 to 1107. [2022-03-20 17:49:04,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1107 states, 958 states have (on average 1.3486430062630481) internal successors, (1292), 958 states have internal predecessors, (1292), 144 states have call successors, (144), 6 states have call predecessors, (144), 4 states have return successors, (142), 142 states have call predecessors, (142), 142 states have call successors, (142) [2022-03-20 17:49:04,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1107 states to 1107 states and 1578 transitions. [2022-03-20 17:49:04,891 INFO L78 Accepts]: Start accepts. Automaton has 1107 states and 1578 transitions. Word has length 344 [2022-03-20 17:49:04,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:49:04,891 INFO L478 AbstractCegarLoop]: Abstraction has 1107 states and 1578 transitions. [2022-03-20 17:49:04,892 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.215686274509804) internal successors, (113), 49 states have internal predecessors, (113), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 17:49:04,892 INFO L276 IsEmpty]: Start isEmpty. Operand 1107 states and 1578 transitions. [2022-03-20 17:49:04,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 352 [2022-03-20 17:49:04,895 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:49:04,895 INFO L499 BasicCegarLoop]: trace histogram [47, 47, 47, 47, 47, 47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:49:04,922 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-03-20 17:49:05,111 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:49:05,111 INFO L403 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:49:05,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:49:05,112 INFO L85 PathProgramCache]: Analyzing trace with hash -1835492499, now seen corresponding path program 91 times [2022-03-20 17:49:05,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:49:05,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [752026016] [2022-03-20 17:49:05,113 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:49:05,113 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:49:05,113 INFO L85 PathProgramCache]: Analyzing trace with hash -1835492499, now seen corresponding path program 92 times [2022-03-20 17:49:05,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:49:05,114 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035253848] [2022-03-20 17:49:05,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:49:05,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:49:05,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:49:06,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:49:06,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:49:06,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 336 [2022-03-20 17:49:06,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:49:06,020 INFO L134 CoverageAnalysis]: Checked inductivity of 7708 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 5499 trivial. 0 not checked. [2022-03-20 17:49:06,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:49:06,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035253848] [2022-03-20 17:49:06,021 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035253848] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:49:06,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1589691436] [2022-03-20 17:49:06,021 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 17:49:06,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:49:06,021 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:49:06,022 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 17:49:06,023 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-03-20 17:49:06,394 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 17:49:06,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:49:06,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 1332 conjuncts, 49 conjunts are in the unsatisfiable core [2022-03-20 17:49:06,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:49:06,790 INFO L134 CoverageAnalysis]: Checked inductivity of 7708 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 5499 trivial. 0 not checked. [2022-03-20 17:49:06,790 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:49:09,297 INFO L134 CoverageAnalysis]: Checked inductivity of 7708 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 5499 trivial. 0 not checked. [2022-03-20 17:49:09,297 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1589691436] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:49:09,298 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:49:09,298 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 50, 50] total 101 [2022-03-20 17:49:09,298 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:49:09,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [752026016] [2022-03-20 17:49:09,298 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [752026016] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:49:09,298 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:49:09,298 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [52] imperfect sequences [] total 52 [2022-03-20 17:49:09,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531136839] [2022-03-20 17:49:09,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:49:09,298 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-03-20 17:49:09,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:49:09,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-03-20 17:49:09,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4855, Invalid=5245, Unknown=0, NotChecked=0, Total=10100 [2022-03-20 17:49:09,301 INFO L87 Difference]: Start difference. First operand 1107 states and 1578 transitions. Second operand has 52 states, 52 states have (on average 2.2115384615384617) internal successors, (115), 50 states have internal predecessors, (115), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 17:49:13,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:49:13,061 INFO L93 Difference]: Finished difference Result 2168 states and 3183 transitions. [2022-03-20 17:49:13,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-03-20 17:49:13,062 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.2115384615384617) internal successors, (115), 50 states have internal predecessors, (115), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 351 [2022-03-20 17:49:13,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:49:13,064 INFO L225 Difference]: With dead ends: 2168 [2022-03-20 17:49:13,064 INFO L226 Difference]: Without dead ends: 1162 [2022-03-20 17:49:13,066 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 806 GetRequests, 657 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1600 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=9762, Invalid=12888, Unknown=0, NotChecked=0, Total=22650 [2022-03-20 17:49:13,067 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 3131 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 2434 mSolverCounterSat, 1429 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s 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 [2022-03-20 17:49:13,067 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [3135 Valid, 47 Invalid, 3863 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1429 Valid, 2434 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-03-20 17:49:13,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1162 states. [2022-03-20 17:49:13,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1162 to 1130. [2022-03-20 17:49:13,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1130 states, 978 states have (on average 1.3486707566462168) internal successors, (1319), 978 states have internal predecessors, (1319), 147 states have call successors, (147), 6 states have call predecessors, (147), 4 states have return successors, (145), 145 states have call predecessors, (145), 145 states have call successors, (145) [2022-03-20 17:49:13,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1130 states to 1130 states and 1611 transitions. [2022-03-20 17:49:13,449 INFO L78 Accepts]: Start accepts. Automaton has 1130 states and 1611 transitions. Word has length 351 [2022-03-20 17:49:13,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:49:13,449 INFO L478 AbstractCegarLoop]: Abstraction has 1130 states and 1611 transitions. [2022-03-20 17:49:13,449 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.2115384615384617) internal successors, (115), 50 states have internal predecessors, (115), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 17:49:13,449 INFO L276 IsEmpty]: Start isEmpty. Operand 1130 states and 1611 transitions. [2022-03-20 17:49:13,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 359 [2022-03-20 17:49:13,452 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:49:13,452 INFO L499 BasicCegarLoop]: trace histogram [48, 48, 48, 48, 48, 48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:49:13,471 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2022-03-20 17:49:13,652 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-03-20 17:49:13,652 INFO L403 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:49:13,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:49:13,653 INFO L85 PathProgramCache]: Analyzing trace with hash -1861561405, now seen corresponding path program 93 times [2022-03-20 17:49:13,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:49:13,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [754279262] [2022-03-20 17:49:13,654 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:49:13,654 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:49:13,655 INFO L85 PathProgramCache]: Analyzing trace with hash -1861561405, now seen corresponding path program 94 times [2022-03-20 17:49:13,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:49:13,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696694497] [2022-03-20 17:49:13,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:49:13,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:49:13,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:49:14,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:49:14,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:49:14,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 343 [2022-03-20 17:49:14,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:49:14,548 INFO L134 CoverageAnalysis]: Checked inductivity of 8040 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 5736 trivial. 0 not checked. [2022-03-20 17:49:14,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:49:14,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696694497] [2022-03-20 17:49:14,549 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696694497] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:49:14,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765382417] [2022-03-20 17:49:14,549 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 17:49:14,549 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:49:14,549 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:49:14,552 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 17:49:14,553 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-03-20 17:49:14,956 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 17:49:14,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:49:14,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 1358 conjuncts, 50 conjunts are in the unsatisfiable core [2022-03-20 17:49:14,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:49:15,390 INFO L134 CoverageAnalysis]: Checked inductivity of 8040 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 5736 trivial. 0 not checked. [2022-03-20 17:49:15,391 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:49:17,974 INFO L134 CoverageAnalysis]: Checked inductivity of 8040 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 5736 trivial. 0 not checked. [2022-03-20 17:49:17,975 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [765382417] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:49:17,975 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:49:17,975 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 51, 51] total 103 [2022-03-20 17:49:17,975 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:49:17,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [754279262] [2022-03-20 17:49:17,975 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [754279262] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:49:17,975 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:49:17,975 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2022-03-20 17:49:17,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406578976] [2022-03-20 17:49:17,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:49:17,976 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-03-20 17:49:17,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:49:17,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-03-20 17:49:17,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5054, Invalid=5452, Unknown=0, NotChecked=0, Total=10506 [2022-03-20 17:49:17,981 INFO L87 Difference]: Start difference. First operand 1130 states and 1611 transitions. Second operand has 53 states, 53 states have (on average 2.207547169811321) internal successors, (117), 51 states have internal predecessors, (117), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 17:49:22,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:49:22,002 INFO L93 Difference]: Finished difference Result 2212 states and 3248 transitions. [2022-03-20 17:49:22,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-03-20 17:49:22,003 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.207547169811321) internal successors, (117), 51 states have internal predecessors, (117), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 358 [2022-03-20 17:49:22,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:49:22,006 INFO L225 Difference]: With dead ends: 2212 [2022-03-20 17:49:22,006 INFO L226 Difference]: Without dead ends: 1185 [2022-03-20 17:49:22,008 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 822 GetRequests, 670 SyntacticMatches, 0 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1658 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=10161, Invalid=13401, Unknown=0, NotChecked=0, Total=23562 [2022-03-20 17:49:22,009 INFO L913 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 [2022-03-20 17:49:22,009 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2752 Valid, 49 Invalid, 3933 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1265 Valid, 2668 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-03-20 17:49:22,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1185 states. [2022-03-20 17:49:22,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1185 to 1153. [2022-03-20 17:49:22,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1153 states, 998 states have (on average 1.348697394789579) internal successors, (1346), 998 states have internal predecessors, (1346), 150 states have call successors, (150), 6 states have call predecessors, (150), 4 states have return successors, (148), 148 states have call predecessors, (148), 148 states have call successors, (148) [2022-03-20 17:49:22,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1153 states to 1153 states and 1644 transitions. [2022-03-20 17:49:22,436 INFO L78 Accepts]: Start accepts. Automaton has 1153 states and 1644 transitions. Word has length 358 [2022-03-20 17:49:22,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:49:22,436 INFO L478 AbstractCegarLoop]: Abstraction has 1153 states and 1644 transitions. [2022-03-20 17:49:22,436 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.207547169811321) internal successors, (117), 51 states have internal predecessors, (117), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 17:49:22,436 INFO L276 IsEmpty]: Start isEmpty. Operand 1153 states and 1644 transitions. [2022-03-20 17:49:22,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 366 [2022-03-20 17:49:22,439 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:49:22,439 INFO L499 BasicCegarLoop]: trace histogram [49, 49, 49, 49, 49, 49, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:49:22,459 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2022-03-20 17:49:22,640 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:49:22,640 INFO L403 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:49:22,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:49:22,640 INFO L85 PathProgramCache]: Analyzing trace with hash -758414679, now seen corresponding path program 95 times [2022-03-20 17:49:22,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:49:22,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1783779822] [2022-03-20 17:49:22,642 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:49:22,642 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:49:22,642 INFO L85 PathProgramCache]: Analyzing trace with hash -758414679, now seen corresponding path program 96 times [2022-03-20 17:49:22,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:49:22,642 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990539271] [2022-03-20 17:49:22,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:49:22,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:49:22,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:49:23,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:49:23,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:49:23,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 350 [2022-03-20 17:49:23,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:49:23,598 INFO L134 CoverageAnalysis]: Checked inductivity of 8379 backedges. 0 proven. 2401 refuted. 0 times theorem prover too weak. 5978 trivial. 0 not checked. [2022-03-20 17:49:23,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:49:23,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990539271] [2022-03-20 17:49:23,598 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990539271] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:49:23,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109641031] [2022-03-20 17:49:23,598 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 17:49:23,598 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:49:23,599 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:49:23,600 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 17:49:23,601 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-03-20 17:49:23,912 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 17:49:23,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:49:23,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 17:49:23,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:49:24,393 INFO L134 CoverageAnalysis]: Checked inductivity of 8379 backedges. 193 proven. 1 refuted. 0 times theorem prover too weak. 8185 trivial. 0 not checked. [2022-03-20 17:49:24,393 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:49:24,839 INFO L134 CoverageAnalysis]: Checked inductivity of 8379 backedges. 193 proven. 1 refuted. 0 times theorem prover too weak. 8185 trivial. 0 not checked. [2022-03-20 17:49:24,840 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1109641031] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:49:24,840 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:49:24,840 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 7, 7] total 62 [2022-03-20 17:49:24,840 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:49:24,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1783779822] [2022-03-20 17:49:24,840 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1783779822] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:49:24,840 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:49:24,840 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [54] imperfect sequences [] total 54 [2022-03-20 17:49:24,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851289049] [2022-03-20 17:49:24,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:49:24,841 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-03-20 17:49:24,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:49:24,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-03-20 17:49:24,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1355, Invalid=2427, Unknown=0, NotChecked=0, Total=3782 [2022-03-20 17:49:24,842 INFO L87 Difference]: Start difference. First operand 1153 states and 1644 transitions. Second operand has 54 states, 54 states have (on average 2.2037037037037037) internal successors, (119), 52 states have internal predecessors, (119), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 17:49:28,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:49:28,758 INFO L93 Difference]: Finished difference Result 2256 states and 3313 transitions. [2022-03-20 17:49:28,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-03-20 17:49:28,758 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.2037037037037037) internal successors, (119), 52 states have internal predecessors, (119), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 365 [2022-03-20 17:49:28,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:49:28,761 INFO L225 Difference]: With dead ends: 2256 [2022-03-20 17:49:28,761 INFO L226 Difference]: Without dead ends: 1208 [2022-03-20 17:49:28,764 INFO L912 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 [2022-03-20 17:49:28,764 INFO L913 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, 1.7s IncrementalHoareTripleChecker+Time [2022-03-20 17:49:28,765 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [3049 Valid, 49 Invalid, 4117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1339 Valid, 2778 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-03-20 17:49:28,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1208 states. [2022-03-20 17:49:29,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1208 to 1176. [2022-03-20 17:49:29,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1176 states, 1018 states have (on average 1.3487229862475443) internal successors, (1373), 1018 states have internal predecessors, (1373), 153 states have call successors, (153), 6 states have call predecessors, (153), 4 states have return successors, (151), 151 states have call predecessors, (151), 151 states have call successors, (151) [2022-03-20 17:49:29,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1176 states to 1176 states and 1677 transitions. [2022-03-20 17:49:29,189 INFO L78 Accepts]: Start accepts. Automaton has 1176 states and 1677 transitions. Word has length 365 [2022-03-20 17:49:29,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:49:29,190 INFO L478 AbstractCegarLoop]: Abstraction has 1176 states and 1677 transitions. [2022-03-20 17:49:29,190 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.2037037037037037) internal successors, (119), 52 states have internal predecessors, (119), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 17:49:29,190 INFO L276 IsEmpty]: Start isEmpty. Operand 1176 states and 1677 transitions. [2022-03-20 17:49:29,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 373 [2022-03-20 17:49:29,193 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:49:29,193 INFO L499 BasicCegarLoop]: trace histogram [50, 50, 50, 50, 50, 50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:49:29,211 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-03-20 17:49:29,394 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2022-03-20 17:49:29,394 INFO L403 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:49:29,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:49:29,394 INFO L85 PathProgramCache]: Analyzing trace with hash 384675463, now seen corresponding path program 97 times [2022-03-20 17:49:29,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:49:29,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [99950126] [2022-03-20 17:49:29,396 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:49:29,396 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:49:29,396 INFO L85 PathProgramCache]: Analyzing trace with hash 384675463, now seen corresponding path program 98 times [2022-03-20 17:49:29,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:49:29,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422827243] [2022-03-20 17:49:29,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:49:29,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:49:29,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:49:30,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:49:30,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:49:30,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 357 [2022-03-20 17:49:30,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:49:30,363 INFO L134 CoverageAnalysis]: Checked inductivity of 8725 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 6225 trivial. 0 not checked. [2022-03-20 17:49:30,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:49:30,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422827243] [2022-03-20 17:49:30,364 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422827243] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:49:30,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1133535208] [2022-03-20 17:49:30,364 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 17:49:30,364 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:49:30,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:49:30,365 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 17:49:30,366 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-03-20 17:49:30,772 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 17:49:30,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:49:30,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 1410 conjuncts, 52 conjunts are in the unsatisfiable core [2022-03-20 17:49:30,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:49:31,310 INFO L134 CoverageAnalysis]: Checked inductivity of 8725 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 6225 trivial. 0 not checked. [2022-03-20 17:49:31,311 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:49:34,080 INFO L134 CoverageAnalysis]: Checked inductivity of 8725 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 6225 trivial. 0 not checked. [2022-03-20 17:49:34,081 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1133535208] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:49:34,081 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:49:34,081 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 53, 53] total 107 [2022-03-20 17:49:34,081 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:49:34,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [99950126] [2022-03-20 17:49:34,081 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [99950126] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:49:34,081 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:49:34,081 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [55] imperfect sequences [] total 55 [2022-03-20 17:49:34,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115471254] [2022-03-20 17:49:34,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:49:34,082 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-03-20 17:49:34,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:49:34,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-03-20 17:49:34,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5464, Invalid=5878, Unknown=0, NotChecked=0, Total=11342 [2022-03-20 17:49:34,084 INFO L87 Difference]: Start difference. First operand 1176 states and 1677 transitions. Second operand has 55 states, 55 states have (on average 2.2) internal successors, (121), 53 states have internal predecessors, (121), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 17:49:38,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:49:38,243 INFO L93 Difference]: Finished difference Result 2300 states and 3378 transitions. [2022-03-20 17:49:38,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-03-20 17:49:38,243 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.2) internal successors, (121), 53 states have internal predecessors, (121), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 372 [2022-03-20 17:49:38,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:49:38,246 INFO L225 Difference]: With dead ends: 2300 [2022-03-20 17:49:38,246 INFO L226 Difference]: Without dead ends: 1231 [2022-03-20 17:49:38,249 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 854 GetRequests, 696 SyntacticMatches, 0 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1777 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=10983, Invalid=14457, Unknown=0, NotChecked=0, Total=25440 [2022-03-20 17:49:38,250 INFO L913 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, 1.7s IncrementalHoareTripleChecker+Time [2022-03-20 17:49:38,250 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [3241 Valid, 47 Invalid, 4127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1434 Valid, 2693 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-03-20 17:49:38,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1231 states. [2022-03-20 17:49:38,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1231 to 1199. [2022-03-20 17:49:38,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1199 states, 1038 states have (on average 1.348747591522158) internal successors, (1400), 1038 states have internal predecessors, (1400), 156 states have call successors, (156), 6 states have call predecessors, (156), 4 states have return successors, (154), 154 states have call predecessors, (154), 154 states have call successors, (154) [2022-03-20 17:49:38,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1199 states to 1199 states and 1710 transitions. [2022-03-20 17:49:38,782 INFO L78 Accepts]: Start accepts. Automaton has 1199 states and 1710 transitions. Word has length 372 [2022-03-20 17:49:38,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:49:38,782 INFO L478 AbstractCegarLoop]: Abstraction has 1199 states and 1710 transitions. [2022-03-20 17:49:38,782 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 2.2) internal successors, (121), 53 states have internal predecessors, (121), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 17:49:38,782 INFO L276 IsEmpty]: Start isEmpty. Operand 1199 states and 1710 transitions. [2022-03-20 17:49:38,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 380 [2022-03-20 17:49:38,798 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:49:38,798 INFO L499 BasicCegarLoop]: trace histogram [51, 51, 51, 51, 51, 51, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:49:38,817 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2022-03-20 17:49:38,999 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2022-03-20 17:49:38,999 INFO L403 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:49:38,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:49:38,999 INFO L85 PathProgramCache]: Analyzing trace with hash 315299301, now seen corresponding path program 99 times [2022-03-20 17:49:38,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:49:38,999 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [104956721] [2022-03-20 17:49:39,001 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:49:39,001 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:49:39,001 INFO L85 PathProgramCache]: Analyzing trace with hash 315299301, now seen corresponding path program 100 times [2022-03-20 17:49:39,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:49:39,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747722147] [2022-03-20 17:49:39,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:49:39,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:49:39,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:49:39,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:49:39,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:49:39,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 364 [2022-03-20 17:49:39,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:49:39,960 INFO L134 CoverageAnalysis]: Checked inductivity of 9078 backedges. 0 proven. 2601 refuted. 0 times theorem prover too weak. 6477 trivial. 0 not checked. [2022-03-20 17:49:39,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:49:39,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747722147] [2022-03-20 17:49:39,960 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747722147] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:49:39,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [590650885] [2022-03-20 17:49:39,961 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 17:49:39,961 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:49:39,961 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:49:39,962 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 17:49:39,963 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-03-20 17:49:40,388 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 17:49:40,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:49:40,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 1436 conjuncts, 53 conjunts are in the unsatisfiable core [2022-03-20 17:49:40,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:49:40,861 INFO L134 CoverageAnalysis]: Checked inductivity of 9078 backedges. 0 proven. 2601 refuted. 0 times theorem prover too weak. 6477 trivial. 0 not checked. [2022-03-20 17:49:40,861 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:49:43,733 INFO L134 CoverageAnalysis]: Checked inductivity of 9078 backedges. 0 proven. 2601 refuted. 0 times theorem prover too weak. 6477 trivial. 0 not checked. [2022-03-20 17:49:43,733 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [590650885] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:49:43,733 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:49:43,734 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 54, 54] total 109 [2022-03-20 17:49:43,734 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:49:43,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [104956721] [2022-03-20 17:49:43,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [104956721] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:49:43,734 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:49:43,734 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [56] imperfect sequences [] total 56 [2022-03-20 17:49:43,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503434848] [2022-03-20 17:49:43,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:49:43,734 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-03-20 17:49:43,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:49:43,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-03-20 17:49:43,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5675, Invalid=6097, Unknown=0, NotChecked=0, Total=11772 [2022-03-20 17:49:43,736 INFO L87 Difference]: Start difference. First operand 1199 states and 1710 transitions. Second operand has 56 states, 56 states have (on average 2.1964285714285716) internal successors, (123), 54 states have internal predecessors, (123), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 17:49:48,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:49:48,002 INFO L93 Difference]: Finished difference Result 2344 states and 3443 transitions. [2022-03-20 17:49:48,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-03-20 17:49:48,002 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.1964285714285716) internal successors, (123), 54 states have internal predecessors, (123), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 379 [2022-03-20 17:49:48,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:49:48,005 INFO L225 Difference]: With dead ends: 2344 [2022-03-20 17:49:48,005 INFO L226 Difference]: Without dead ends: 1254 [2022-03-20 17:49:48,007 INFO L912 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 [2022-03-20 17:49:48,007 INFO L913 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 [2022-03-20 17:49:48,008 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2970 Valid, 49 Invalid, 4328 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1317 Valid, 3011 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-03-20 17:49:48,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1254 states. [2022-03-20 17:49:48,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1254 to 1222. [2022-03-20 17:49:48,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1222 states, 1058 states have (on average 1.3487712665406428) internal successors, (1427), 1058 states have internal predecessors, (1427), 159 states have call successors, (159), 6 states have call predecessors, (159), 4 states have return successors, (157), 157 states have call predecessors, (157), 157 states have call successors, (157) [2022-03-20 17:49:48,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1222 states to 1222 states and 1743 transitions. [2022-03-20 17:49:48,471 INFO L78 Accepts]: Start accepts. Automaton has 1222 states and 1743 transitions. Word has length 379 [2022-03-20 17:49:48,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:49:48,471 INFO L478 AbstractCegarLoop]: Abstraction has 1222 states and 1743 transitions. [2022-03-20 17:49:48,471 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 2.1964285714285716) internal successors, (123), 54 states have internal predecessors, (123), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 17:49:48,471 INFO L276 IsEmpty]: Start isEmpty. Operand 1222 states and 1743 transitions. [2022-03-20 17:49:48,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 387 [2022-03-20 17:49:48,474 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:49:48,474 INFO L499 BasicCegarLoop]: trace histogram [52, 52, 52, 52, 52, 52, 52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:49:48,494 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2022-03-20 17:49:48,674 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:49:48,675 INFO L403 AbstractCegarLoop]: === Iteration 55 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:49:48,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:49:48,675 INFO L85 PathProgramCache]: Analyzing trace with hash -2096923317, now seen corresponding path program 101 times [2022-03-20 17:49:48,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:49:48,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1551553452] [2022-03-20 17:49:48,677 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:49:48,677 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:49:48,677 INFO L85 PathProgramCache]: Analyzing trace with hash -2096923317, now seen corresponding path program 102 times [2022-03-20 17:49:48,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:49:48,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807592778] [2022-03-20 17:49:48,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:49:48,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:49:48,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:49:49,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:49:49,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:49:49,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 371 [2022-03-20 17:49:49,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:49:49,716 INFO L134 CoverageAnalysis]: Checked inductivity of 9438 backedges. 0 proven. 2704 refuted. 0 times theorem prover too weak. 6734 trivial. 0 not checked. [2022-03-20 17:49:49,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:49:49,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807592778] [2022-03-20 17:49:49,717 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807592778] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:49:49,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166886559] [2022-03-20 17:49:49,717 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 17:49:49,717 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:49:49,717 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:49:49,718 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 17:49:49,719 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-03-20 17:49:50,059 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 17:49:50,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:49:50,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 17:49:50,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:49:50,565 INFO L134 CoverageAnalysis]: Checked inductivity of 9438 backedges. 205 proven. 1 refuted. 0 times theorem prover too weak. 9232 trivial. 0 not checked. [2022-03-20 17:49:50,566 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:49:51,025 INFO L134 CoverageAnalysis]: Checked inductivity of 9438 backedges. 205 proven. 1 refuted. 0 times theorem prover too weak. 9232 trivial. 0 not checked. [2022-03-20 17:49:51,025 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [166886559] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:49:51,026 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:49:51,026 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 7, 7] total 65 [2022-03-20 17:49:51,026 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:49:51,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1551553452] [2022-03-20 17:49:51,026 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1551553452] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:49:51,026 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:49:51,026 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [57] imperfect sequences [] total 57 [2022-03-20 17:49:51,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453999989] [2022-03-20 17:49:51,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:49:51,027 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-03-20 17:49:51,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:49:51,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-03-20 17:49:51,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1514, Invalid=2646, Unknown=0, NotChecked=0, Total=4160 [2022-03-20 17:49:51,028 INFO L87 Difference]: Start difference. First operand 1222 states and 1743 transitions. Second operand has 57 states, 57 states have (on average 2.192982456140351) internal successors, (125), 55 states have internal predecessors, (125), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 17:49:55,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:49:55,274 INFO L93 Difference]: Finished difference Result 2388 states and 3508 transitions. [2022-03-20 17:49:55,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-03-20 17:49:55,274 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.192982456140351) internal successors, (125), 55 states have internal predecessors, (125), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 386 [2022-03-20 17:49:55,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:49:55,276 INFO L225 Difference]: With dead ends: 2388 [2022-03-20 17:49:55,277 INFO L226 Difference]: Without dead ends: 1277 [2022-03-20 17:49:55,279 INFO L912 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 [2022-03-20 17:49:55,279 INFO L913 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, 1.8s IncrementalHoareTripleChecker+Time [2022-03-20 17:49:55,279 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [3042 Valid, 53 Invalid, 4393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1397 Valid, 2996 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-03-20 17:49:55,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1277 states. [2022-03-20 17:49:55,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1277 to 1245. [2022-03-20 17:49:55,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1245 states, 1078 states have (on average 1.3487940630797774) internal successors, (1454), 1078 states have internal predecessors, (1454), 162 states have call successors, (162), 6 states have call predecessors, (162), 4 states have return successors, (160), 160 states have call predecessors, (160), 160 states have call successors, (160) [2022-03-20 17:49:55,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1245 states to 1245 states and 1776 transitions. [2022-03-20 17:49:55,737 INFO L78 Accepts]: Start accepts. Automaton has 1245 states and 1776 transitions. Word has length 386 [2022-03-20 17:49:55,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:49:55,737 INFO L478 AbstractCegarLoop]: Abstraction has 1245 states and 1776 transitions. [2022-03-20 17:49:55,738 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 2.192982456140351) internal successors, (125), 55 states have internal predecessors, (125), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 17:49:55,738 INFO L276 IsEmpty]: Start isEmpty. Operand 1245 states and 1776 transitions. [2022-03-20 17:49:55,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 394 [2022-03-20 17:49:55,741 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:49:55,741 INFO L499 BasicCegarLoop]: trace histogram [53, 53, 53, 53, 53, 53, 53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:49:55,764 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2022-03-20 17:49:55,957 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2022-03-20 17:49:55,957 INFO L403 AbstractCegarLoop]: === Iteration 56 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:49:55,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:49:55,957 INFO L85 PathProgramCache]: Analyzing trace with hash -529001183, now seen corresponding path program 103 times [2022-03-20 17:49:55,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:49:55,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1190162759] [2022-03-20 17:49:55,959 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:49:55,959 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:49:55,959 INFO L85 PathProgramCache]: Analyzing trace with hash -529001183, now seen corresponding path program 104 times [2022-03-20 17:49:55,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:49:55,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352124307] [2022-03-20 17:49:55,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:49:55,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:49:56,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:49:56,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:49:56,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:49:57,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 378 [2022-03-20 17:49:57,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:49:57,007 INFO L134 CoverageAnalysis]: Checked inductivity of 9805 backedges. 0 proven. 2809 refuted. 0 times theorem prover too weak. 6996 trivial. 0 not checked. [2022-03-20 17:49:57,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:49:57,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352124307] [2022-03-20 17:49:57,007 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352124307] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:49:57,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [879758236] [2022-03-20 17:49:57,007 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 17:49:57,007 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:49:57,007 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:49:57,008 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 17:49:57,010 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-03-20 17:49:57,467 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 17:49:57,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:49:57,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 1488 conjuncts, 55 conjunts are in the unsatisfiable core [2022-03-20 17:49:57,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:49:57,904 INFO L134 CoverageAnalysis]: Checked inductivity of 9805 backedges. 0 proven. 2809 refuted. 0 times theorem prover too weak. 6996 trivial. 0 not checked. [2022-03-20 17:49:57,905 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:50:01,024 INFO L134 CoverageAnalysis]: Checked inductivity of 9805 backedges. 0 proven. 2809 refuted. 0 times theorem prover too weak. 6996 trivial. 0 not checked. [2022-03-20 17:50:01,025 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [879758236] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:50:01,025 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:50:01,025 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 56, 56] total 113 [2022-03-20 17:50:01,025 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:50:01,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1190162759] [2022-03-20 17:50:01,025 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1190162759] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:50:01,025 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:50:01,025 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [58] imperfect sequences [] total 58 [2022-03-20 17:50:01,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695477183] [2022-03-20 17:50:01,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:50:01,026 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-03-20 17:50:01,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:50:01,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-03-20 17:50:01,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6109, Invalid=6547, Unknown=0, NotChecked=0, Total=12656 [2022-03-20 17:50:01,029 INFO L87 Difference]: Start difference. First operand 1245 states and 1776 transitions. Second operand has 58 states, 58 states have (on average 2.189655172413793) internal successors, (127), 56 states have internal predecessors, (127), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 17:50:05,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:50:05,678 INFO L93 Difference]: Finished difference Result 2432 states and 3573 transitions. [2022-03-20 17:50:05,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-03-20 17:50:05,679 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 2.189655172413793) internal successors, (127), 56 states have internal predecessors, (127), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 393 [2022-03-20 17:50:05,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:50:05,681 INFO L225 Difference]: With dead ends: 2432 [2022-03-20 17:50:05,681 INFO L226 Difference]: Without dead ends: 1300 [2022-03-20 17:50:05,684 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 902 GetRequests, 735 SyntacticMatches, 0 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1963 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=12276, Invalid=16116, Unknown=0, NotChecked=0, Total=28392 [2022-03-20 17:50:05,684 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 3112 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 3177 mSolverCounterSat, 1374 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3116 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 4551 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1374 IncrementalHoareTripleChecker+Valid, 3177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-03-20 17:50:05,684 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [3116 Valid, 49 Invalid, 4551 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1374 Valid, 3177 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-03-20 17:50:05,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1300 states. [2022-03-20 17:50:06,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1300 to 1268. [2022-03-20 17:50:06,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1268 states, 1098 states have (on average 1.348816029143898) internal successors, (1481), 1098 states have internal predecessors, (1481), 165 states have call successors, (165), 6 states have call predecessors, (165), 4 states have return successors, (163), 163 states have call predecessors, (163), 163 states have call successors, (163) [2022-03-20 17:50:06,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1268 states to 1268 states and 1809 transitions. [2022-03-20 17:50:06,179 INFO L78 Accepts]: Start accepts. Automaton has 1268 states and 1809 transitions. Word has length 393 [2022-03-20 17:50:06,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:50:06,180 INFO L478 AbstractCegarLoop]: Abstraction has 1268 states and 1809 transitions. [2022-03-20 17:50:06,180 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 2.189655172413793) internal successors, (127), 56 states have internal predecessors, (127), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 17:50:06,180 INFO L276 IsEmpty]: Start isEmpty. Operand 1268 states and 1809 transitions. [2022-03-20 17:50:06,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 401 [2022-03-20 17:50:06,183 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:50:06,183 INFO L499 BasicCegarLoop]: trace histogram [54, 54, 54, 54, 54, 54, 54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:50:06,202 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2022-03-20 17:50:06,383 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2022-03-20 17:50:06,383 INFO L403 AbstractCegarLoop]: === Iteration 57 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:50:06,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:50:06,384 INFO L85 PathProgramCache]: Analyzing trace with hash 1210810383, now seen corresponding path program 105 times [2022-03-20 17:50:06,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:50:06,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1400958473] [2022-03-20 17:50:06,385 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:50:06,385 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:50:06,385 INFO L85 PathProgramCache]: Analyzing trace with hash 1210810383, now seen corresponding path program 106 times [2022-03-20 17:50:06,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:50:06,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729998758] [2022-03-20 17:50:06,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:50:06,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:50:06,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:50:07,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:50:07,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:50:07,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 385 [2022-03-20 17:50:07,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:50:07,503 INFO L134 CoverageAnalysis]: Checked inductivity of 10179 backedges. 0 proven. 2916 refuted. 0 times theorem prover too weak. 7263 trivial. 0 not checked. [2022-03-20 17:50:07,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:50:07,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729998758] [2022-03-20 17:50:07,504 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729998758] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:50:07,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321701793] [2022-03-20 17:50:07,504 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 17:50:07,504 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:50:07,504 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:50:07,505 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 17:50:07,506 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-03-20 17:50:07,959 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 17:50:07,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:50:07,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 1514 conjuncts, 56 conjunts are in the unsatisfiable core [2022-03-20 17:50:07,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:50:08,436 INFO L134 CoverageAnalysis]: Checked inductivity of 10179 backedges. 0 proven. 2916 refuted. 0 times theorem prover too weak. 7263 trivial. 0 not checked. [2022-03-20 17:50:08,436 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:50:11,609 INFO L134 CoverageAnalysis]: Checked inductivity of 10179 backedges. 0 proven. 2916 refuted. 0 times theorem prover too weak. 7263 trivial. 0 not checked. [2022-03-20 17:50:11,610 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1321701793] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:50:11,610 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:50:11,610 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 57, 57] total 115 [2022-03-20 17:50:11,610 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:50:11,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1400958473] [2022-03-20 17:50:11,610 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1400958473] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:50:11,611 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:50:11,611 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [59] imperfect sequences [] total 59 [2022-03-20 17:50:11,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132211684] [2022-03-20 17:50:11,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:50:11,611 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-03-20 17:50:11,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:50:11,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-03-20 17:50:11,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6332, Invalid=6778, Unknown=0, NotChecked=0, Total=13110 [2022-03-20 17:50:11,614 INFO L87 Difference]: Start difference. First operand 1268 states and 1809 transitions. Second operand has 59 states, 59 states have (on average 2.1864406779661016) internal successors, (129), 57 states have internal predecessors, (129), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 17:50:16,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:50:16,394 INFO L93 Difference]: Finished difference Result 2476 states and 3638 transitions. [2022-03-20 17:50:16,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-03-20 17:50:16,394 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 2.1864406779661016) internal successors, (129), 57 states have internal predecessors, (129), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 400 [2022-03-20 17:50:16,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:50:16,397 INFO L225 Difference]: With dead ends: 2476 [2022-03-20 17:50:16,397 INFO L226 Difference]: Without dead ends: 1323 [2022-03-20 17:50:16,399 INFO L912 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 [2022-03-20 17:50:16,400 INFO L913 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 [2022-03-20 17:50:16,400 INFO L914 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] [2022-03-20 17:50:16,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1323 states. [2022-03-20 17:50:16,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1323 to 1291. [2022-03-20 17:50:16,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1291 states, 1118 states have (on average 1.3488372093023255) internal successors, (1508), 1118 states have internal predecessors, (1508), 168 states have call successors, (168), 6 states have call predecessors, (168), 4 states have return successors, (166), 166 states have call predecessors, (166), 166 states have call successors, (166) [2022-03-20 17:50:16,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1291 states to 1291 states and 1842 transitions. [2022-03-20 17:50:16,910 INFO L78 Accepts]: Start accepts. Automaton has 1291 states and 1842 transitions. Word has length 400 [2022-03-20 17:50:16,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:50:16,910 INFO L478 AbstractCegarLoop]: Abstraction has 1291 states and 1842 transitions. [2022-03-20 17:50:16,910 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 2.1864406779661016) internal successors, (129), 57 states have internal predecessors, (129), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 17:50:16,910 INFO L276 IsEmpty]: Start isEmpty. Operand 1291 states and 1842 transitions. [2022-03-20 17:50:16,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 408 [2022-03-20 17:50:16,913 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:50:16,913 INFO L499 BasicCegarLoop]: trace histogram [55, 55, 55, 55, 55, 55, 55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:50:16,932 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2022-03-20 17:50:17,113 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:50:17,114 INFO L403 AbstractCegarLoop]: === Iteration 58 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:50:17,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:50:17,114 INFO L85 PathProgramCache]: Analyzing trace with hash -1624031139, now seen corresponding path program 107 times [2022-03-20 17:50:17,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:50:17,114 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [62322693] [2022-03-20 17:50:17,115 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:50:17,115 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:50:17,115 INFO L85 PathProgramCache]: Analyzing trace with hash -1624031139, now seen corresponding path program 108 times [2022-03-20 17:50:17,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:50:17,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657414063] [2022-03-20 17:50:17,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:50:17,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:50:17,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:50:18,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:50:18,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:50:18,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 392 [2022-03-20 17:50:18,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:50:18,213 INFO L134 CoverageAnalysis]: Checked inductivity of 10560 backedges. 0 proven. 3025 refuted. 0 times theorem prover too weak. 7535 trivial. 0 not checked. [2022-03-20 17:50:18,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:50:18,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657414063] [2022-03-20 17:50:18,213 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657414063] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:50:18,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013362311] [2022-03-20 17:50:18,214 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 17:50:18,214 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:50:18,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:50:18,215 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 17:50:18,215 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-03-20 17:50:18,577 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 17:50:18,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:50:18,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 17:50:18,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:50:19,128 INFO L134 CoverageAnalysis]: Checked inductivity of 10560 backedges. 217 proven. 1 refuted. 0 times theorem prover too weak. 10342 trivial. 0 not checked. [2022-03-20 17:50:19,129 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:50:19,613 INFO L134 CoverageAnalysis]: Checked inductivity of 10560 backedges. 217 proven. 1 refuted. 0 times theorem prover too weak. 10342 trivial. 0 not checked. [2022-03-20 17:50:19,613 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1013362311] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:50:19,613 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:50:19,614 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 7, 7] total 68 [2022-03-20 17:50:19,614 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:50:19,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [62322693] [2022-03-20 17:50:19,614 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [62322693] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:50:19,614 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:50:19,614 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [60] imperfect sequences [] total 60 [2022-03-20 17:50:19,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102592972] [2022-03-20 17:50:19,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:50:19,614 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-03-20 17:50:19,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:50:19,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-03-20 17:50:19,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1682, Invalid=2874, Unknown=0, NotChecked=0, Total=4556 [2022-03-20 17:50:19,615 INFO L87 Difference]: Start difference. First operand 1291 states and 1842 transitions. Second operand has 60 states, 60 states have (on average 2.183333333333333) internal successors, (131), 58 states have internal predecessors, (131), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 17:50:24,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:50:24,207 INFO L93 Difference]: Finished difference Result 2520 states and 3703 transitions. [2022-03-20 17:50:24,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-03-20 17:50:24,208 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 2.183333333333333) internal successors, (131), 58 states have internal predecessors, (131), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 407 [2022-03-20 17:50:24,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:50:24,211 INFO L225 Difference]: With dead ends: 2520 [2022-03-20 17:50:24,211 INFO L226 Difference]: Without dead ends: 1346 [2022-03-20 17:50:24,217 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 934 GetRequests, 809 SyntacticMatches, 1 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2322 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=5107, Invalid=10643, Unknown=0, NotChecked=0, Total=15750 [2022-03-20 17:50:24,217 INFO L913 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 [2022-03-20 17:50:24,217 INFO L914 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] [2022-03-20 17:50:24,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1346 states. [2022-03-20 17:50:24,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1346 to 1314. [2022-03-20 17:50:24,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1314 states, 1138 states have (on average 1.3488576449912126) internal successors, (1535), 1138 states have internal predecessors, (1535), 171 states have call successors, (171), 6 states have call predecessors, (171), 4 states have return successors, (169), 169 states have call predecessors, (169), 169 states have call successors, (169) [2022-03-20 17:50:24,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1314 states to 1314 states and 1875 transitions. [2022-03-20 17:50:24,891 INFO L78 Accepts]: Start accepts. Automaton has 1314 states and 1875 transitions. Word has length 407 [2022-03-20 17:50:24,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:50:24,891 INFO L478 AbstractCegarLoop]: Abstraction has 1314 states and 1875 transitions. [2022-03-20 17:50:24,891 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 2.183333333333333) internal successors, (131), 58 states have internal predecessors, (131), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 17:50:24,891 INFO L276 IsEmpty]: Start isEmpty. Operand 1314 states and 1875 transitions. [2022-03-20 17:50:24,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 415 [2022-03-20 17:50:24,895 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:50:24,896 INFO L499 BasicCegarLoop]: trace histogram [56, 56, 56, 56, 56, 56, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:50:24,913 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2022-03-20 17:50:25,099 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:50:25,099 INFO L403 AbstractCegarLoop]: === Iteration 59 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:50:25,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:50:25,100 INFO L85 PathProgramCache]: Analyzing trace with hash -708512045, now seen corresponding path program 109 times [2022-03-20 17:50:25,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:50:25,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1925737447] [2022-03-20 17:50:25,101 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:50:25,101 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:50:25,101 INFO L85 PathProgramCache]: Analyzing trace with hash -708512045, now seen corresponding path program 110 times [2022-03-20 17:50:25,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:50:25,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198858309] [2022-03-20 17:50:25,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:50:25,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:50:25,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:50:26,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:50:26,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:50:26,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 399 [2022-03-20 17:50:26,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:50:26,248 INFO L134 CoverageAnalysis]: Checked inductivity of 10948 backedges. 0 proven. 3136 refuted. 0 times theorem prover too weak. 7812 trivial. 0 not checked. [2022-03-20 17:50:26,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:50:26,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198858309] [2022-03-20 17:50:26,248 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198858309] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:50:26,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1228956567] [2022-03-20 17:50:26,248 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 17:50:26,248 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:50:26,249 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:50:26,250 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 17:50:26,251 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-03-20 17:50:26,751 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 17:50:26,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:50:26,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 1566 conjuncts, 58 conjunts are in the unsatisfiable core [2022-03-20 17:50:26,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:50:27,216 INFO L134 CoverageAnalysis]: Checked inductivity of 10948 backedges. 0 proven. 3136 refuted. 0 times theorem prover too weak. 7812 trivial. 0 not checked. [2022-03-20 17:50:27,216 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:50:30,595 INFO L134 CoverageAnalysis]: Checked inductivity of 10948 backedges. 0 proven. 3136 refuted. 0 times theorem prover too weak. 7812 trivial. 0 not checked. [2022-03-20 17:50:30,595 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1228956567] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:50:30,595 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:50:30,595 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 59, 59] total 119 [2022-03-20 17:50:30,595 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:50:30,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1925737447] [2022-03-20 17:50:30,596 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1925737447] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:50:30,596 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:50:30,596 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [61] imperfect sequences [] total 61 [2022-03-20 17:50:30,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459241598] [2022-03-20 17:50:30,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:50:30,596 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-03-20 17:50:30,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:50:30,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-03-20 17:50:30,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6790, Invalid=7252, Unknown=0, NotChecked=0, Total=14042 [2022-03-20 17:50:30,598 INFO L87 Difference]: Start difference. First operand 1314 states and 1875 transitions. Second operand has 61 states, 61 states have (on average 2.180327868852459) internal successors, (133), 59 states have internal predecessors, (133), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 17:50:35,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:50:35,682 INFO L93 Difference]: Finished difference Result 2564 states and 3768 transitions. [2022-03-20 17:50:35,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-03-20 17:50:35,682 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 2.180327868852459) internal successors, (133), 59 states have internal predecessors, (133), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 414 [2022-03-20 17:50:35,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:50:35,685 INFO L225 Difference]: With dead ends: 2564 [2022-03-20 17:50:35,685 INFO L226 Difference]: Without dead ends: 1369 [2022-03-20 17:50:35,687 INFO L912 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 [2022-03-20 17:50:35,688 INFO L913 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 [2022-03-20 17:50:35,688 INFO L914 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] [2022-03-20 17:50:35,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1369 states. [2022-03-20 17:50:36,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1369 to 1337. [2022-03-20 17:50:36,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1337 states, 1158 states have (on average 1.3488773747841105) internal successors, (1562), 1158 states have internal predecessors, (1562), 174 states have call successors, (174), 6 states have call predecessors, (174), 4 states have return successors, (172), 172 states have call predecessors, (172), 172 states have call successors, (172) [2022-03-20 17:50:36,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1337 states to 1337 states and 1908 transitions. [2022-03-20 17:50:36,238 INFO L78 Accepts]: Start accepts. Automaton has 1337 states and 1908 transitions. Word has length 414 [2022-03-20 17:50:36,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:50:36,239 INFO L478 AbstractCegarLoop]: Abstraction has 1337 states and 1908 transitions. [2022-03-20 17:50:36,239 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 2.180327868852459) internal successors, (133), 59 states have internal predecessors, (133), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 17:50:36,239 INFO L276 IsEmpty]: Start isEmpty. Operand 1337 states and 1908 transitions. [2022-03-20 17:50:36,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 422 [2022-03-20 17:50:36,242 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:50:36,242 INFO L499 BasicCegarLoop]: trace histogram [57, 57, 57, 57, 57, 57, 57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:50:36,262 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2022-03-20 17:50:36,442 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:50:36,443 INFO L403 AbstractCegarLoop]: === Iteration 60 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:50:36,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:50:36,443 INFO L85 PathProgramCache]: Analyzing trace with hash -472033383, now seen corresponding path program 111 times [2022-03-20 17:50:36,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:50:36,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1356036803] [2022-03-20 17:50:36,444 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:50:36,444 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:50:36,444 INFO L85 PathProgramCache]: Analyzing trace with hash -472033383, now seen corresponding path program 112 times [2022-03-20 17:50:36,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:50:36,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506182] [2022-03-20 17:50:36,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:50:36,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:50:36,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:50:37,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:50:37,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:50:37,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 406 [2022-03-20 17:50:37,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:50:37,647 INFO L134 CoverageAnalysis]: Checked inductivity of 11343 backedges. 0 proven. 3249 refuted. 0 times theorem prover too weak. 8094 trivial. 0 not checked. [2022-03-20 17:50:37,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:50:37,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506182] [2022-03-20 17:50:37,648 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506182] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:50:37,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996464851] [2022-03-20 17:50:37,648 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 17:50:37,648 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:50:37,648 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:50:37,649 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 17:50:37,650 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-03-20 17:50:38,143 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 17:50:38,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:50:38,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 1592 conjuncts, 59 conjunts are in the unsatisfiable core [2022-03-20 17:50:38,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:50:38,616 INFO L134 CoverageAnalysis]: Checked inductivity of 11343 backedges. 0 proven. 3249 refuted. 0 times theorem prover too weak. 8094 trivial. 0 not checked. [2022-03-20 17:50:38,616 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:50:42,183 INFO L134 CoverageAnalysis]: Checked inductivity of 11343 backedges. 0 proven. 3249 refuted. 0 times theorem prover too weak. 8094 trivial. 0 not checked. [2022-03-20 17:50:42,183 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1996464851] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:50:42,183 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:50:42,183 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 60, 60] total 121 [2022-03-20 17:50:42,183 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:50:42,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1356036803] [2022-03-20 17:50:42,184 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1356036803] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:50:42,184 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:50:42,184 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [62] imperfect sequences [] total 62 [2022-03-20 17:50:42,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412750401] [2022-03-20 17:50:42,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:50:42,184 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-03-20 17:50:42,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:50:42,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-03-20 17:50:42,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7025, Invalid=7495, Unknown=0, NotChecked=0, Total=14520 [2022-03-20 17:50:42,185 INFO L87 Difference]: Start difference. First operand 1337 states and 1908 transitions. Second operand has 62 states, 62 states have (on average 2.1774193548387095) internal successors, (135), 60 states have internal predecessors, (135), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 17:50:47,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:50:47,512 INFO L93 Difference]: Finished difference Result 2608 states and 3833 transitions. [2022-03-20 17:50:47,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-03-20 17:50:47,512 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 2.1774193548387095) internal successors, (135), 60 states have internal predecessors, (135), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 421 [2022-03-20 17:50:47,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:50:47,516 INFO L225 Difference]: With dead ends: 2608 [2022-03-20 17:50:47,516 INFO L226 Difference]: Without dead ends: 1392 [2022-03-20 17:50:47,520 INFO L912 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 [2022-03-20 17:50:47,520 INFO L913 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 [2022-03-20 17:50:47,521 INFO L914 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] [2022-03-20 17:50:47,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1392 states. [2022-03-20 17:50:48,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1392 to 1360. [2022-03-20 17:50:48,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1360 states, 1178 states have (on average 1.3488964346349746) internal successors, (1589), 1178 states have internal predecessors, (1589), 177 states have call successors, (177), 6 states have call predecessors, (177), 4 states have return successors, (175), 175 states have call predecessors, (175), 175 states have call successors, (175) [2022-03-20 17:50:48,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1360 states to 1360 states and 1941 transitions. [2022-03-20 17:50:48,240 INFO L78 Accepts]: Start accepts. Automaton has 1360 states and 1941 transitions. Word has length 421 [2022-03-20 17:50:48,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:50:48,240 INFO L478 AbstractCegarLoop]: Abstraction has 1360 states and 1941 transitions. [2022-03-20 17:50:48,240 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 2.1774193548387095) internal successors, (135), 60 states have internal predecessors, (135), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 17:50:48,240 INFO L276 IsEmpty]: Start isEmpty. Operand 1360 states and 1941 transitions. [2022-03-20 17:50:48,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 429 [2022-03-20 17:50:48,244 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:50:48,244 INFO L499 BasicCegarLoop]: trace histogram [58, 58, 58, 58, 58, 58, 58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:50:48,270 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2022-03-20 17:50:48,467 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2022-03-20 17:50:48,467 INFO L403 AbstractCegarLoop]: === Iteration 61 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:50:48,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:50:48,468 INFO L85 PathProgramCache]: Analyzing trace with hash 1001333143, now seen corresponding path program 113 times [2022-03-20 17:50:48,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:50:48,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1600670418] [2022-03-20 17:50:48,469 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:50:48,469 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:50:48,469 INFO L85 PathProgramCache]: Analyzing trace with hash 1001333143, now seen corresponding path program 114 times [2022-03-20 17:50:48,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:50:48,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713303447] [2022-03-20 17:50:48,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:50:48,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:50:48,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:50:49,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:50:49,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:50:49,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 413 [2022-03-20 17:50:49,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:50:49,717 INFO L134 CoverageAnalysis]: Checked inductivity of 11745 backedges. 0 proven. 3364 refuted. 0 times theorem prover too weak. 8381 trivial. 0 not checked. [2022-03-20 17:50:49,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:50:49,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713303447] [2022-03-20 17:50:49,717 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713303447] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:50:49,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090478980] [2022-03-20 17:50:49,718 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 17:50:49,718 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:50:49,718 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:50:49,719 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 17:50:49,719 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-03-20 17:50:50,105 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 17:50:50,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:50:50,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 17:50:50,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:50:50,658 INFO L134 CoverageAnalysis]: Checked inductivity of 11745 backedges. 229 proven. 1 refuted. 0 times theorem prover too weak. 11515 trivial. 0 not checked. [2022-03-20 17:50:50,658 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:50:51,166 INFO L134 CoverageAnalysis]: Checked inductivity of 11745 backedges. 229 proven. 1 refuted. 0 times theorem prover too weak. 11515 trivial. 0 not checked. [2022-03-20 17:50:51,166 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2090478980] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:50:51,167 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:50:51,167 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 7, 7] total 71 [2022-03-20 17:50:51,167 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:50:51,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1600670418] [2022-03-20 17:50:51,167 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1600670418] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:50:51,167 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:50:51,167 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [63] imperfect sequences [] total 63 [2022-03-20 17:50:51,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781911431] [2022-03-20 17:50:51,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:50:51,168 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-03-20 17:50:51,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:50:51,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-03-20 17:50:51,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1859, Invalid=3111, Unknown=0, NotChecked=0, Total=4970 [2022-03-20 17:50:51,169 INFO L87 Difference]: Start difference. First operand 1360 states and 1941 transitions. Second operand has 63 states, 63 states have (on average 2.1746031746031744) internal successors, (137), 61 states have internal predecessors, (137), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 17:50:56,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:50:56,221 INFO L93 Difference]: Finished difference Result 2652 states and 3898 transitions. [2022-03-20 17:50:56,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-03-20 17:50:56,222 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 2.1746031746031744) internal successors, (137), 61 states have internal predecessors, (137), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 428 [2022-03-20 17:50:56,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:50:56,225 INFO L225 Difference]: With dead ends: 2652 [2022-03-20 17:50:56,225 INFO L226 Difference]: Without dead ends: 1415 [2022-03-20 17:50:56,227 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 982 GetRequests, 851 SyntacticMatches, 1 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2535 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=5644, Invalid=11648, Unknown=0, NotChecked=0, Total=17292 [2022-03-20 17:50:56,228 INFO L913 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 [2022-03-20 17:50:56,228 INFO L914 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] [2022-03-20 17:50:56,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1415 states. [2022-03-20 17:50:56,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1415 to 1383. [2022-03-20 17:50:56,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1383 states, 1198 states have (on average 1.348914858096828) internal successors, (1616), 1198 states have internal predecessors, (1616), 180 states have call successors, (180), 6 states have call predecessors, (180), 4 states have return successors, (178), 178 states have call predecessors, (178), 178 states have call successors, (178) [2022-03-20 17:50:56,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1383 states to 1383 states and 1974 transitions. [2022-03-20 17:50:56,808 INFO L78 Accepts]: Start accepts. Automaton has 1383 states and 1974 transitions. Word has length 428 [2022-03-20 17:50:56,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:50:56,809 INFO L478 AbstractCegarLoop]: Abstraction has 1383 states and 1974 transitions. [2022-03-20 17:50:56,809 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 2.1746031746031744) internal successors, (137), 61 states have internal predecessors, (137), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 17:50:56,809 INFO L276 IsEmpty]: Start isEmpty. Operand 1383 states and 1974 transitions. [2022-03-20 17:50:56,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 436 [2022-03-20 17:50:56,812 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:50:56,812 INFO L499 BasicCegarLoop]: trace histogram [59, 59, 59, 59, 59, 59, 59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:50:56,830 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2022-03-20 17:50:57,013 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2022-03-20 17:50:57,013 INFO L403 AbstractCegarLoop]: === Iteration 62 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:50:57,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:50:57,013 INFO L85 PathProgramCache]: Analyzing trace with hash -791209259, now seen corresponding path program 115 times [2022-03-20 17:50:57,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:50:57,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [738558588] [2022-03-20 17:50:57,014 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:50:57,015 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:50:57,015 INFO L85 PathProgramCache]: Analyzing trace with hash -791209259, now seen corresponding path program 116 times [2022-03-20 17:50:57,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:50:57,015 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067693578] [2022-03-20 17:50:57,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:50:57,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:50:57,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:50:58,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:50:58,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:50:58,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 420 [2022-03-20 17:50:58,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:50:58,256 INFO L134 CoverageAnalysis]: Checked inductivity of 12154 backedges. 0 proven. 3481 refuted. 0 times theorem prover too weak. 8673 trivial. 0 not checked. [2022-03-20 17:50:58,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:50:58,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067693578] [2022-03-20 17:50:58,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067693578] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:50:58,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [147324327] [2022-03-20 17:50:58,257 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 17:50:58,257 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:50:58,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:50:58,258 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 17:50:58,258 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-03-20 17:50:58,772 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 17:50:58,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:50:58,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 1644 conjuncts, 61 conjunts are in the unsatisfiable core [2022-03-20 17:50:58,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:50:59,262 INFO L134 CoverageAnalysis]: Checked inductivity of 12154 backedges. 0 proven. 3481 refuted. 0 times theorem prover too weak. 8673 trivial. 0 not checked. [2022-03-20 17:50:59,263 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:51:02,979 INFO L134 CoverageAnalysis]: Checked inductivity of 12154 backedges. 0 proven. 3481 refuted. 0 times theorem prover too weak. 8673 trivial. 0 not checked. [2022-03-20 17:51:02,979 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [147324327] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:51:02,979 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:51:02,979 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 62, 62] total 125 [2022-03-20 17:51:02,979 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:51:02,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [738558588] [2022-03-20 17:51:02,979 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [738558588] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:51:02,979 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:51:02,979 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [64] imperfect sequences [] total 64 [2022-03-20 17:51:02,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918223292] [2022-03-20 17:51:02,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:51:02,980 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-03-20 17:51:02,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:51:02,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-03-20 17:51:02,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7507, Invalid=7993, Unknown=0, NotChecked=0, Total=15500 [2022-03-20 17:51:02,982 INFO L87 Difference]: Start difference. First operand 1383 states and 1974 transitions. Second operand has 64 states, 64 states have (on average 2.171875) internal successors, (139), 62 states have internal predecessors, (139), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 17:51:08,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:51:08,600 INFO L93 Difference]: Finished difference Result 2696 states and 3963 transitions. [2022-03-20 17:51:08,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-03-20 17:51:08,601 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 2.171875) internal successors, (139), 62 states have internal predecessors, (139), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 435 [2022-03-20 17:51:08,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:51:08,604 INFO L225 Difference]: With dead ends: 2696 [2022-03-20 17:51:08,604 INFO L226 Difference]: Without dead ends: 1438 [2022-03-20 17:51:08,607 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 998 GetRequests, 813 SyntacticMatches, 0 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2362 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=15078, Invalid=19704, Unknown=0, NotChecked=0, Total=34782 [2022-03-20 17:51:08,607 INFO L913 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 [2022-03-20 17:51:08,607 INFO L914 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] [2022-03-20 17:51:08,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1438 states. [2022-03-20 17:51:09,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1438 to 1406. [2022-03-20 17:51:09,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1406 states, 1218 states have (on average 1.3489326765188834) internal successors, (1643), 1218 states have internal predecessors, (1643), 183 states have call successors, (183), 6 states have call predecessors, (183), 4 states have return successors, (181), 181 states have call predecessors, (181), 181 states have call successors, (181) [2022-03-20 17:51:09,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1406 states to 1406 states and 2007 transitions. [2022-03-20 17:51:09,265 INFO L78 Accepts]: Start accepts. Automaton has 1406 states and 2007 transitions. Word has length 435 [2022-03-20 17:51:09,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:51:09,265 INFO L478 AbstractCegarLoop]: Abstraction has 1406 states and 2007 transitions. [2022-03-20 17:51:09,265 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 2.171875) internal successors, (139), 62 states have internal predecessors, (139), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 17:51:09,265 INFO L276 IsEmpty]: Start isEmpty. Operand 1406 states and 2007 transitions. [2022-03-20 17:51:09,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 443 [2022-03-20 17:51:09,271 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:51:09,271 INFO L499 BasicCegarLoop]: trace histogram [60, 60, 60, 60, 60, 60, 60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:51:09,290 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2022-03-20 17:51:09,471 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2022-03-20 17:51:09,472 INFO L403 AbstractCegarLoop]: === Iteration 63 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:51:09,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:51:09,472 INFO L85 PathProgramCache]: Analyzing trace with hash -834060197, now seen corresponding path program 117 times [2022-03-20 17:51:09,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:51:09,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1723410818] [2022-03-20 17:51:09,473 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:51:09,473 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:51:09,473 INFO L85 PathProgramCache]: Analyzing trace with hash -834060197, now seen corresponding path program 118 times [2022-03-20 17:51:09,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:51:09,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390919094] [2022-03-20 17:51:09,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:51:09,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:51:09,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:51:10,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:51:10,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:51:10,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 427 [2022-03-20 17:51:10,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:51:10,747 INFO L134 CoverageAnalysis]: Checked inductivity of 12570 backedges. 0 proven. 3600 refuted. 0 times theorem prover too weak. 8970 trivial. 0 not checked. [2022-03-20 17:51:10,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:51:10,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390919094] [2022-03-20 17:51:10,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1390919094] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:51:10,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495772493] [2022-03-20 17:51:10,747 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 17:51:10,747 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:51:10,748 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:51:10,750 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 17:51:10,751 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-03-20 17:51:11,273 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 17:51:11,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:51:11,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 1670 conjuncts, 62 conjunts are in the unsatisfiable core [2022-03-20 17:51:11,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:51:11,804 INFO L134 CoverageAnalysis]: Checked inductivity of 12570 backedges. 0 proven. 3600 refuted. 0 times theorem prover too weak. 8970 trivial. 0 not checked. [2022-03-20 17:51:11,805 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:51:15,610 INFO L134 CoverageAnalysis]: Checked inductivity of 12570 backedges. 0 proven. 3600 refuted. 0 times theorem prover too weak. 8970 trivial. 0 not checked. [2022-03-20 17:51:15,610 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [495772493] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:51:15,610 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:51:15,610 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 63, 63] total 127 [2022-03-20 17:51:15,611 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:51:15,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1723410818] [2022-03-20 17:51:15,611 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1723410818] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:51:15,611 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:51:15,611 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [65] imperfect sequences [] total 65 [2022-03-20 17:51:15,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266624169] [2022-03-20 17:51:15,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:51:15,611 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-03-20 17:51:15,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:51:15,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-03-20 17:51:15,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7754, Invalid=8248, Unknown=0, NotChecked=0, Total=16002 [2022-03-20 17:51:15,614 INFO L87 Difference]: Start difference. First operand 1406 states and 2007 transitions. Second operand has 65 states, 65 states have (on average 2.169230769230769) internal successors, (141), 63 states have internal predecessors, (141), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 17:51:21,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:51:21,576 INFO L93 Difference]: Finished difference Result 2740 states and 4028 transitions. [2022-03-20 17:51:21,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-03-20 17:51:21,577 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 2.169230769230769) internal successors, (141), 63 states have internal predecessors, (141), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 442 [2022-03-20 17:51:21,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:51:21,580 INFO L225 Difference]: With dead ends: 2740 [2022-03-20 17:51:21,580 INFO L226 Difference]: Without dead ends: 1461 [2022-03-20 17:51:21,584 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1014 GetRequests, 826 SyntacticMatches, 0 SemanticMatches, 188 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2432 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=15573, Invalid=20337, Unknown=0, NotChecked=0, Total=35910 [2022-03-20 17:51:21,585 INFO L913 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 [2022-03-20 17:51:21,585 INFO L914 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] [2022-03-20 17:51:21,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1461 states. [2022-03-20 17:51:22,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1461 to 1429. [2022-03-20 17:51:22,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1429 states, 1238 states have (on average 1.3489499192245558) internal successors, (1670), 1238 states have internal predecessors, (1670), 186 states have call successors, (186), 6 states have call predecessors, (186), 4 states have return successors, (184), 184 states have call predecessors, (184), 184 states have call successors, (184) [2022-03-20 17:51:22,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1429 states to 1429 states and 2040 transitions. [2022-03-20 17:51:22,286 INFO L78 Accepts]: Start accepts. Automaton has 1429 states and 2040 transitions. Word has length 442 [2022-03-20 17:51:22,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:51:22,286 INFO L478 AbstractCegarLoop]: Abstraction has 1429 states and 2040 transitions. [2022-03-20 17:51:22,286 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 2.169230769230769) internal successors, (141), 63 states have internal predecessors, (141), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 17:51:22,286 INFO L276 IsEmpty]: Start isEmpty. Operand 1429 states and 2040 transitions. [2022-03-20 17:51:22,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 450 [2022-03-20 17:51:22,289 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:51:22,289 INFO L499 BasicCegarLoop]: trace histogram [61, 61, 61, 61, 61, 61, 61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:51:22,309 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2022-03-20 17:51:22,489 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:51:22,490 INFO L403 AbstractCegarLoop]: === Iteration 64 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:51:22,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:51:22,490 INFO L85 PathProgramCache]: Analyzing trace with hash 1912687121, now seen corresponding path program 119 times [2022-03-20 17:51:22,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:51:22,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1047302032] [2022-03-20 17:51:22,491 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:51:22,491 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:51:22,491 INFO L85 PathProgramCache]: Analyzing trace with hash 1912687121, now seen corresponding path program 120 times [2022-03-20 17:51:22,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:51:22,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370111965] [2022-03-20 17:51:22,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:51:22,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:51:22,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:51:23,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:51:23,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:51:23,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 434 [2022-03-20 17:51:23,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:51:23,819 INFO L134 CoverageAnalysis]: Checked inductivity of 12993 backedges. 0 proven. 3721 refuted. 0 times theorem prover too weak. 9272 trivial. 0 not checked. [2022-03-20 17:51:23,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:51:23,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370111965] [2022-03-20 17:51:23,820 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370111965] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:51:23,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037595997] [2022-03-20 17:51:23,820 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 17:51:23,820 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:51:23,820 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:51:23,821 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 17:51:23,822 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-03-20 17:51:24,239 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 17:51:24,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:51:24,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 17:51:24,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:51:24,815 INFO L134 CoverageAnalysis]: Checked inductivity of 12993 backedges. 241 proven. 1 refuted. 0 times theorem prover too weak. 12751 trivial. 0 not checked. [2022-03-20 17:51:24,815 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:51:25,333 INFO L134 CoverageAnalysis]: Checked inductivity of 12993 backedges. 241 proven. 1 refuted. 0 times theorem prover too weak. 12751 trivial. 0 not checked. [2022-03-20 17:51:25,333 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2037595997] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:51:25,334 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:51:25,334 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 7, 7] total 74 [2022-03-20 17:51:25,334 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:51:25,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1047302032] [2022-03-20 17:51:25,334 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1047302032] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:51:25,334 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:51:25,334 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [66] imperfect sequences [] total 66 [2022-03-20 17:51:25,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611606587] [2022-03-20 17:51:25,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:51:25,335 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-03-20 17:51:25,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:51:25,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-03-20 17:51:25,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2045, Invalid=3357, Unknown=0, NotChecked=0, Total=5402 [2022-03-20 17:51:25,337 INFO L87 Difference]: Start difference. First operand 1429 states and 2040 transitions. Second operand has 66 states, 66 states have (on average 2.1666666666666665) internal successors, (143), 64 states have internal predecessors, (143), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 17:51:30,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:51:30,766 INFO L93 Difference]: Finished difference Result 2784 states and 4093 transitions. [2022-03-20 17:51:30,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-03-20 17:51:30,767 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 2.1666666666666665) internal successors, (143), 64 states have internal predecessors, (143), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 449 [2022-03-20 17:51:30,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:51:30,770 INFO L225 Difference]: With dead ends: 2784 [2022-03-20 17:51:30,770 INFO L226 Difference]: Without dead ends: 1484 [2022-03-20 17:51:30,773 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1030 GetRequests, 893 SyntacticMatches, 1 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2757 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=6208, Invalid=12698, Unknown=0, NotChecked=0, Total=18906 [2022-03-20 17:51:30,773 INFO L913 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 [2022-03-20 17:51:30,773 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [3475 Valid, 61 Invalid, 5273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1455 Valid, 3818 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-03-20 17:51:30,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1484 states. [2022-03-20 17:51:31,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1484 to 1452. [2022-03-20 17:51:31,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1452 states, 1258 states have (on average 1.348966613672496) internal successors, (1697), 1258 states have internal predecessors, (1697), 189 states have call successors, (189), 6 states have call predecessors, (189), 4 states have return successors, (187), 187 states have call predecessors, (187), 187 states have call successors, (187) [2022-03-20 17:51:31,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1452 states to 1452 states and 2073 transitions. [2022-03-20 17:51:31,464 INFO L78 Accepts]: Start accepts. Automaton has 1452 states and 2073 transitions. Word has length 449 [2022-03-20 17:51:31,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:51:31,464 INFO L478 AbstractCegarLoop]: Abstraction has 1452 states and 2073 transitions. [2022-03-20 17:51:31,464 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 2.1666666666666665) internal successors, (143), 64 states have internal predecessors, (143), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 17:51:31,464 INFO L276 IsEmpty]: Start isEmpty. Operand 1452 states and 2073 transitions. [2022-03-20 17:51:31,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 457 [2022-03-20 17:51:31,467 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:51:31,467 INFO L499 BasicCegarLoop]: trace histogram [62, 62, 62, 62, 62, 62, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:51:31,485 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2022-03-20 17:51:31,667 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:51:31,668 INFO L403 AbstractCegarLoop]: === Iteration 65 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:51:31,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:51:31,668 INFO L85 PathProgramCache]: Analyzing trace with hash -898460897, now seen corresponding path program 121 times [2022-03-20 17:51:31,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:51:31,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [104892531] [2022-03-20 17:51:31,669 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:51:31,669 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:51:31,669 INFO L85 PathProgramCache]: Analyzing trace with hash -898460897, now seen corresponding path program 122 times [2022-03-20 17:51:31,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:51:31,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824686569] [2022-03-20 17:51:31,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:51:31,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:51:31,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:51:33,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:51:33,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:51:33,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 441 [2022-03-20 17:51:33,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:51:33,031 INFO L134 CoverageAnalysis]: Checked inductivity of 13423 backedges. 0 proven. 3844 refuted. 0 times theorem prover too weak. 9579 trivial. 0 not checked. [2022-03-20 17:51:33,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:51:33,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824686569] [2022-03-20 17:51:33,031 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824686569] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:51:33,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285084723] [2022-03-20 17:51:33,031 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 17:51:33,031 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:51:33,031 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:51:33,033 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 17:51:33,033 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-03-20 17:51:33,582 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 17:51:33,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:51:33,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 1722 conjuncts, 64 conjunts are in the unsatisfiable core [2022-03-20 17:51:33,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:51:34,097 INFO L134 CoverageAnalysis]: Checked inductivity of 13423 backedges. 0 proven. 3844 refuted. 0 times theorem prover too weak. 9579 trivial. 0 not checked. [2022-03-20 17:51:34,097 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:51:38,151 INFO L134 CoverageAnalysis]: Checked inductivity of 13423 backedges. 0 proven. 3844 refuted. 0 times theorem prover too weak. 9579 trivial. 0 not checked. [2022-03-20 17:51:38,151 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1285084723] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:51:38,151 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:51:38,152 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 65, 65] total 131 [2022-03-20 17:51:38,152 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:51:38,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [104892531] [2022-03-20 17:51:38,152 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [104892531] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:51:38,152 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:51:38,152 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [67] imperfect sequences [] total 67 [2022-03-20 17:51:38,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834448859] [2022-03-20 17:51:38,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:51:38,153 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-03-20 17:51:38,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:51:38,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-03-20 17:51:38,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8260, Invalid=8770, Unknown=0, NotChecked=0, Total=17030 [2022-03-20 17:51:38,155 INFO L87 Difference]: Start difference. First operand 1452 states and 2073 transitions. Second operand has 67 states, 67 states have (on average 2.1641791044776117) internal successors, (145), 65 states have internal predecessors, (145), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 17:51:44,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:51:44,443 INFO L93 Difference]: Finished difference Result 2828 states and 4158 transitions. [2022-03-20 17:51:44,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-03-20 17:51:44,444 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 2.1641791044776117) internal successors, (145), 65 states have internal predecessors, (145), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 456 [2022-03-20 17:51:44,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:51:44,446 INFO L225 Difference]: With dead ends: 2828 [2022-03-20 17:51:44,447 INFO L226 Difference]: Without dead ends: 1507 [2022-03-20 17:51:44,450 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1046 GetRequests, 852 SyntacticMatches, 0 SemanticMatches, 194 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2575 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=16587, Invalid=21633, Unknown=0, NotChecked=0, Total=38220 [2022-03-20 17:51:44,450 INFO L913 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 [2022-03-20 17:51:44,450 INFO L914 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] [2022-03-20 17:51:44,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1507 states. [2022-03-20 17:51:45,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1507 to 1475. [2022-03-20 17:51:45,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1475 states, 1278 states have (on average 1.3489827856025038) internal successors, (1724), 1278 states have internal predecessors, (1724), 192 states have call successors, (192), 6 states have call predecessors, (192), 4 states have return successors, (190), 190 states have call predecessors, (190), 190 states have call successors, (190) [2022-03-20 17:51:45,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1475 states to 1475 states and 2106 transitions. [2022-03-20 17:51:45,104 INFO L78 Accepts]: Start accepts. Automaton has 1475 states and 2106 transitions. Word has length 456 [2022-03-20 17:51:45,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:51:45,104 INFO L478 AbstractCegarLoop]: Abstraction has 1475 states and 2106 transitions. [2022-03-20 17:51:45,104 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 2.1641791044776117) internal successors, (145), 65 states have internal predecessors, (145), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 17:51:45,104 INFO L276 IsEmpty]: Start isEmpty. Operand 1475 states and 2106 transitions. [2022-03-20 17:51:45,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 464 [2022-03-20 17:51:45,107 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:51:45,107 INFO L499 BasicCegarLoop]: trace histogram [63, 63, 63, 63, 63, 63, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:51:45,127 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2022-03-20 17:51:45,307 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2022-03-20 17:51:45,307 INFO L403 AbstractCegarLoop]: === Iteration 66 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:51:45,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:51:45,308 INFO L85 PathProgramCache]: Analyzing trace with hash 415016269, now seen corresponding path program 123 times [2022-03-20 17:51:45,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:51:45,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [541984162] [2022-03-20 17:51:45,309 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:51:45,309 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:51:45,309 INFO L85 PathProgramCache]: Analyzing trace with hash 415016269, now seen corresponding path program 124 times [2022-03-20 17:51:45,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:51:45,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925767423] [2022-03-20 17:51:45,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:51:45,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:51:45,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:51:46,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:51:46,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:51:46,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 448 [2022-03-20 17:51:46,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:51:46,708 INFO L134 CoverageAnalysis]: Checked inductivity of 13860 backedges. 0 proven. 3969 refuted. 0 times theorem prover too weak. 9891 trivial. 0 not checked. [2022-03-20 17:51:46,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:51:46,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925767423] [2022-03-20 17:51:46,709 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925767423] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:51:46,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479791544] [2022-03-20 17:51:46,709 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 17:51:46,709 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:51:46,709 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:51:46,710 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 17:51:46,711 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-03-20 17:51:47,294 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 17:51:47,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:51:47,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 1748 conjuncts, 65 conjunts are in the unsatisfiable core [2022-03-20 17:51:47,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:51:47,812 INFO L134 CoverageAnalysis]: Checked inductivity of 13860 backedges. 0 proven. 3969 refuted. 0 times theorem prover too weak. 9891 trivial. 0 not checked. [2022-03-20 17:51:47,812 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:51:51,988 INFO L134 CoverageAnalysis]: Checked inductivity of 13860 backedges. 0 proven. 3969 refuted. 0 times theorem prover too weak. 9891 trivial. 0 not checked. [2022-03-20 17:51:51,988 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1479791544] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:51:51,988 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:51:51,989 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 66, 66] total 133 [2022-03-20 17:51:51,989 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:51:51,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [541984162] [2022-03-20 17:51:51,989 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [541984162] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:51:51,989 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:51:51,989 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [68] imperfect sequences [] total 68 [2022-03-20 17:51:51,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534700993] [2022-03-20 17:51:51,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:51:51,990 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-03-20 17:51:51,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:51:51,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-03-20 17:51:51,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8519, Invalid=9037, Unknown=0, NotChecked=0, Total=17556 [2022-03-20 17:51:51,993 INFO L87 Difference]: Start difference. First operand 1475 states and 2106 transitions. Second operand has 68 states, 68 states have (on average 2.161764705882353) internal successors, (147), 66 states have internal predecessors, (147), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 17:51:58,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:51:58,496 INFO L93 Difference]: Finished difference Result 2872 states and 4223 transitions. [2022-03-20 17:51:58,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-03-20 17:51:58,496 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 2.161764705882353) internal successors, (147), 66 states have internal predecessors, (147), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 463 [2022-03-20 17:51:58,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:51:58,499 INFO L225 Difference]: With dead ends: 2872 [2022-03-20 17:51:58,499 INFO L226 Difference]: Without dead ends: 1530 [2022-03-20 17:51:58,502 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1062 GetRequests, 865 SyntacticMatches, 0 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2648 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=17106, Invalid=22296, Unknown=0, NotChecked=0, Total=39402 [2022-03-20 17:51:58,503 INFO L913 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, 2.2s IncrementalHoareTripleChecker+Time [2022-03-20 17:51:58,503 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [3713 Valid, 59 Invalid, 5414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1724 Valid, 3690 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-03-20 17:51:58,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1530 states. [2022-03-20 17:51:59,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1530 to 1498. [2022-03-20 17:51:59,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1498 states, 1298 states have (on average 1.3489984591679507) internal successors, (1751), 1298 states have internal predecessors, (1751), 195 states have call successors, (195), 6 states have call predecessors, (195), 4 states have return successors, (193), 193 states have call predecessors, (193), 193 states have call successors, (193) [2022-03-20 17:51:59,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1498 states to 1498 states and 2139 transitions. [2022-03-20 17:51:59,169 INFO L78 Accepts]: Start accepts. Automaton has 1498 states and 2139 transitions. Word has length 463 [2022-03-20 17:51:59,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:51:59,169 INFO L478 AbstractCegarLoop]: Abstraction has 1498 states and 2139 transitions. [2022-03-20 17:51:59,169 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 2.161764705882353) internal successors, (147), 66 states have internal predecessors, (147), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 17:51:59,170 INFO L276 IsEmpty]: Start isEmpty. Operand 1498 states and 2139 transitions. [2022-03-20 17:51:59,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 471 [2022-03-20 17:51:59,172 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:51:59,172 INFO L499 BasicCegarLoop]: trace histogram [64, 64, 64, 64, 64, 64, 64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:51:59,193 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2022-03-20 17:51:59,373 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2022-03-20 17:51:59,373 INFO L403 AbstractCegarLoop]: === Iteration 67 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:51:59,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:51:59,373 INFO L85 PathProgramCache]: Analyzing trace with hash -108373533, now seen corresponding path program 125 times [2022-03-20 17:51:59,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:51:59,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [735079697] [2022-03-20 17:51:59,374 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:51:59,374 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:51:59,375 INFO L85 PathProgramCache]: Analyzing trace with hash -108373533, now seen corresponding path program 126 times [2022-03-20 17:51:59,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:51:59,375 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852951534] [2022-03-20 17:51:59,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:51:59,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:51:59,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:52:00,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:52:00,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:52:00,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 455 [2022-03-20 17:52:00,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:52:00,797 INFO L134 CoverageAnalysis]: Checked inductivity of 14304 backedges. 0 proven. 4096 refuted. 0 times theorem prover too weak. 10208 trivial. 0 not checked. [2022-03-20 17:52:00,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:52:00,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852951534] [2022-03-20 17:52:00,797 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852951534] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:52:00,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1832861070] [2022-03-20 17:52:00,797 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 17:52:00,798 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:52:00,798 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:52:00,799 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 17:52:00,830 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-03-20 17:52:01,265 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 17:52:01,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:52:01,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 17:52:01,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:52:01,864 INFO L134 CoverageAnalysis]: Checked inductivity of 14304 backedges. 253 proven. 1 refuted. 0 times theorem prover too weak. 14050 trivial. 0 not checked. [2022-03-20 17:52:01,865 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:52:02,414 INFO L134 CoverageAnalysis]: Checked inductivity of 14304 backedges. 253 proven. 1 refuted. 0 times theorem prover too weak. 14050 trivial. 0 not checked. [2022-03-20 17:52:02,414 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1832861070] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:52:02,415 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:52:02,415 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 7, 7] total 77 [2022-03-20 17:52:02,415 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:52:02,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [735079697] [2022-03-20 17:52:02,415 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [735079697] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:52:02,415 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:52:02,415 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [69] imperfect sequences [] total 69 [2022-03-20 17:52:02,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657048486] [2022-03-20 17:52:02,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:52:02,416 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-03-20 17:52:02,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:52:02,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-03-20 17:52:02,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2240, Invalid=3612, Unknown=0, NotChecked=0, Total=5852 [2022-03-20 17:52:02,417 INFO L87 Difference]: Start difference. First operand 1498 states and 2139 transitions. Second operand has 69 states, 69 states have (on average 2.1594202898550723) internal successors, (149), 67 states have internal predecessors, (149), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 17:52:08,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:52:08,351 INFO L93 Difference]: Finished difference Result 2916 states and 4288 transitions. [2022-03-20 17:52:08,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-03-20 17:52:08,351 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 2.1594202898550723) internal successors, (149), 67 states have internal predecessors, (149), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 470 [2022-03-20 17:52:08,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:52:08,354 INFO L225 Difference]: With dead ends: 2916 [2022-03-20 17:52:08,354 INFO L226 Difference]: Without dead ends: 1553 [2022-03-20 17:52:08,356 INFO L912 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 [2022-03-20 17:52:08,356 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 4028 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 3692 mSolverCounterSat, 1842 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s 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 [2022-03-20 17:52:08,357 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [4032 Valid, 51 Invalid, 5534 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1842 Valid, 3692 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-03-20 17:52:08,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1553 states. [2022-03-20 17:52:09,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1553 to 1521. [2022-03-20 17:52:09,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1521 states, 1318 states have (on average 1.3490136570561457) internal successors, (1778), 1318 states have internal predecessors, (1778), 198 states have call successors, (198), 6 states have call predecessors, (198), 4 states have return successors, (196), 196 states have call predecessors, (196), 196 states have call successors, (196) [2022-03-20 17:52:09,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1521 states to 1521 states and 2172 transitions. [2022-03-20 17:52:09,042 INFO L78 Accepts]: Start accepts. Automaton has 1521 states and 2172 transitions. Word has length 470 [2022-03-20 17:52:09,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:52:09,042 INFO L478 AbstractCegarLoop]: Abstraction has 1521 states and 2172 transitions. [2022-03-20 17:52:09,042 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 2.1594202898550723) internal successors, (149), 67 states have internal predecessors, (149), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 17:52:09,042 INFO L276 IsEmpty]: Start isEmpty. Operand 1521 states and 2172 transitions. [2022-03-20 17:52:09,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 478 [2022-03-20 17:52:09,045 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:52:09,046 INFO L499 BasicCegarLoop]: trace histogram [65, 65, 65, 65, 65, 65, 65, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:52:09,064 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2022-03-20 17:52:09,246 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:52:09,246 INFO L403 AbstractCegarLoop]: === Iteration 68 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:52:09,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:52:09,246 INFO L85 PathProgramCache]: Analyzing trace with hash -1209406327, now seen corresponding path program 127 times [2022-03-20 17:52:09,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:52:09,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [487962604] [2022-03-20 17:52:09,248 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:52:09,248 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:52:09,248 INFO L85 PathProgramCache]: Analyzing trace with hash -1209406327, now seen corresponding path program 128 times [2022-03-20 17:52:09,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:52:09,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528712803] [2022-03-20 17:52:09,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:52:09,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:52:09,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:52:10,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:52:10,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:52:10,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 462 [2022-03-20 17:52:10,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:52:10,734 INFO L134 CoverageAnalysis]: Checked inductivity of 14755 backedges. 0 proven. 4225 refuted. 0 times theorem prover too weak. 10530 trivial. 0 not checked. [2022-03-20 17:52:10,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:52:10,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528712803] [2022-03-20 17:52:10,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [528712803] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:52:10,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [21085185] [2022-03-20 17:52:10,734 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 17:52:10,735 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:52:10,735 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:52:10,736 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 17:52:10,736 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-03-20 17:52:11,347 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 17:52:11,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:52:11,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 1800 conjuncts, 67 conjunts are in the unsatisfiable core [2022-03-20 17:52:11,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:52:11,884 INFO L134 CoverageAnalysis]: Checked inductivity of 14755 backedges. 0 proven. 4225 refuted. 0 times theorem prover too weak. 10530 trivial. 0 not checked. [2022-03-20 17:52:11,884 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:52:16,289 INFO L134 CoverageAnalysis]: Checked inductivity of 14755 backedges. 0 proven. 4225 refuted. 0 times theorem prover too weak. 10530 trivial. 0 not checked. [2022-03-20 17:52:16,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [21085185] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:52:16,289 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:52:16,289 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 68, 68] total 137 [2022-03-20 17:52:16,289 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:52:16,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [487962604] [2022-03-20 17:52:16,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [487962604] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:52:16,290 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:52:16,290 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [70] imperfect sequences [] total 70 [2022-03-20 17:52:16,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662453234] [2022-03-20 17:52:16,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:52:16,290 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-03-20 17:52:16,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:52:16,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-03-20 17:52:16,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9049, Invalid=9583, Unknown=0, NotChecked=0, Total=18632 [2022-03-20 17:52:16,292 INFO L87 Difference]: Start difference. First operand 1521 states and 2172 transitions. Second operand has 70 states, 70 states have (on average 2.157142857142857) internal successors, (151), 68 states have internal predecessors, (151), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 17:52:23,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:52:23,117 INFO L93 Difference]: Finished difference Result 2960 states and 4353 transitions. [2022-03-20 17:52:23,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-03-20 17:52:23,118 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 2.157142857142857) internal successors, (151), 68 states have internal predecessors, (151), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 477 [2022-03-20 17:52:23,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:52:23,120 INFO L225 Difference]: With dead ends: 2960 [2022-03-20 17:52:23,120 INFO L226 Difference]: Without dead ends: 1576 [2022-03-20 17:52:23,123 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1094 GetRequests, 891 SyntacticMatches, 0 SemanticMatches, 203 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2797 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=18168, Invalid=23652, Unknown=0, NotChecked=0, Total=41820 [2022-03-20 17:52:23,124 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 4666 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 3525 mSolverCounterSat, 2277 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s 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, 2.3s IncrementalHoareTripleChecker+Time [2022-03-20 17:52:23,124 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [4670 Valid, 47 Invalid, 5802 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2277 Valid, 3525 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-03-20 17:52:23,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1576 states. [2022-03-20 17:52:23,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1576 to 1544. [2022-03-20 17:52:23,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1544 states, 1338 states have (on average 1.3490284005979074) internal successors, (1805), 1338 states have internal predecessors, (1805), 201 states have call successors, (201), 6 states have call predecessors, (201), 4 states have return successors, (199), 199 states have call predecessors, (199), 199 states have call successors, (199) [2022-03-20 17:52:23,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1544 states to 1544 states and 2205 transitions. [2022-03-20 17:52:23,832 INFO L78 Accepts]: Start accepts. Automaton has 1544 states and 2205 transitions. Word has length 477 [2022-03-20 17:52:23,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:52:23,833 INFO L478 AbstractCegarLoop]: Abstraction has 1544 states and 2205 transitions. [2022-03-20 17:52:23,833 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 2.157142857142857) internal successors, (151), 68 states have internal predecessors, (151), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 17:52:23,833 INFO L276 IsEmpty]: Start isEmpty. Operand 1544 states and 2205 transitions. [2022-03-20 17:52:23,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 485 [2022-03-20 17:52:23,837 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:52:23,837 INFO L499 BasicCegarLoop]: trace histogram [66, 66, 66, 66, 66, 66, 66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:52:23,863 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2022-03-20 17:52:24,051 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2022-03-20 17:52:24,052 INFO L403 AbstractCegarLoop]: === Iteration 69 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:52:24,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:52:24,052 INFO L85 PathProgramCache]: Analyzing trace with hash 1433392295, now seen corresponding path program 129 times [2022-03-20 17:52:24,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:52:24,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [319436610] [2022-03-20 17:52:24,053 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:52:24,053 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:52:24,054 INFO L85 PathProgramCache]: Analyzing trace with hash 1433392295, now seen corresponding path program 130 times [2022-03-20 17:52:24,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:52:24,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990751800] [2022-03-20 17:52:24,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:52:24,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:52:24,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:52:25,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:52:25,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:52:25,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 469 [2022-03-20 17:52:25,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:52:25,571 INFO L134 CoverageAnalysis]: Checked inductivity of 15213 backedges. 0 proven. 4356 refuted. 0 times theorem prover too weak. 10857 trivial. 0 not checked. [2022-03-20 17:52:25,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:52:25,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990751800] [2022-03-20 17:52:25,571 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990751800] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:52:25,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [805478858] [2022-03-20 17:52:25,571 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 17:52:25,571 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:52:25,571 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:52:25,572 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 17:52:25,574 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-03-20 17:52:26,184 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 17:52:26,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:52:26,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 1826 conjuncts, 68 conjunts are in the unsatisfiable core [2022-03-20 17:52:26,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:52:26,724 INFO L134 CoverageAnalysis]: Checked inductivity of 15213 backedges. 0 proven. 4356 refuted. 0 times theorem prover too weak. 10857 trivial. 0 not checked. [2022-03-20 17:52:26,724 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:52:31,254 INFO L134 CoverageAnalysis]: Checked inductivity of 15213 backedges. 0 proven. 4356 refuted. 0 times theorem prover too weak. 10857 trivial. 0 not checked. [2022-03-20 17:52:31,255 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [805478858] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:52:31,255 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:52:31,255 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 69, 69] total 139 [2022-03-20 17:52:31,255 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:52:31,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [319436610] [2022-03-20 17:52:31,255 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [319436610] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:52:31,255 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:52:31,255 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [71] imperfect sequences [] total 71 [2022-03-20 17:52:31,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685801812] [2022-03-20 17:52:31,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:52:31,256 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-03-20 17:52:31,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:52:31,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-03-20 17:52:31,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9320, Invalid=9862, Unknown=0, NotChecked=0, Total=19182 [2022-03-20 17:52:31,258 INFO L87 Difference]: Start difference. First operand 1544 states and 2205 transitions. Second operand has 71 states, 71 states have (on average 2.1549295774647885) internal successors, (153), 69 states have internal predecessors, (153), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 17:52:38,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:52:38,377 INFO L93 Difference]: Finished difference Result 3004 states and 4418 transitions. [2022-03-20 17:52:38,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-03-20 17:52:38,377 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 2.1549295774647885) internal successors, (153), 69 states have internal predecessors, (153), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 484 [2022-03-20 17:52:38,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:52:38,380 INFO L225 Difference]: With dead ends: 3004 [2022-03-20 17:52:38,380 INFO L226 Difference]: Without dead ends: 1599 [2022-03-20 17:52:38,383 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1110 GetRequests, 904 SyntacticMatches, 0 SemanticMatches, 206 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2873 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=18711, Invalid=24345, Unknown=0, NotChecked=0, Total=43056 [2022-03-20 17:52:38,383 INFO L913 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, 2.4s IncrementalHoareTripleChecker+Time [2022-03-20 17:52:38,383 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [3975 Valid, 51 Invalid, 5674 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1852 Valid, 3822 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-03-20 17:52:38,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1599 states. [2022-03-20 17:52:39,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1599 to 1567. [2022-03-20 17:52:39,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1567 states, 1358 states have (on average 1.3490427098674522) internal successors, (1832), 1358 states have internal predecessors, (1832), 204 states have call successors, (204), 6 states have call predecessors, (204), 4 states have return successors, (202), 202 states have call predecessors, (202), 202 states have call successors, (202) [2022-03-20 17:52:39,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1567 states to 1567 states and 2238 transitions. [2022-03-20 17:52:39,124 INFO L78 Accepts]: Start accepts. Automaton has 1567 states and 2238 transitions. Word has length 484 [2022-03-20 17:52:39,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:52:39,124 INFO L478 AbstractCegarLoop]: Abstraction has 1567 states and 2238 transitions. [2022-03-20 17:52:39,124 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 2.1549295774647885) internal successors, (153), 69 states have internal predecessors, (153), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 17:52:39,124 INFO L276 IsEmpty]: Start isEmpty. Operand 1567 states and 2238 transitions. [2022-03-20 17:52:39,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 492 [2022-03-20 17:52:39,127 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:52:39,127 INFO L499 BasicCegarLoop]: trace histogram [67, 67, 67, 67, 67, 67, 67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:52:39,148 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Ended with exit code 0 [2022-03-20 17:52:39,328 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2022-03-20 17:52:39,328 INFO L403 AbstractCegarLoop]: === Iteration 70 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:52:39,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:52:39,328 INFO L85 PathProgramCache]: Analyzing trace with hash 1072291781, now seen corresponding path program 131 times [2022-03-20 17:52:39,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:52:39,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [478097524] [2022-03-20 17:52:39,330 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:52:39,330 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:52:39,330 INFO L85 PathProgramCache]: Analyzing trace with hash 1072291781, now seen corresponding path program 132 times [2022-03-20 17:52:39,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:52:39,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445226446] [2022-03-20 17:52:39,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:52:39,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:52:39,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:52:40,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:52:40,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:52:40,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 476 [2022-03-20 17:52:40,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:52:40,904 INFO L134 CoverageAnalysis]: Checked inductivity of 15678 backedges. 0 proven. 4489 refuted. 0 times theorem prover too weak. 11189 trivial. 0 not checked. [2022-03-20 17:52:40,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:52:40,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445226446] [2022-03-20 17:52:40,904 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445226446] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:52:40,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1537090822] [2022-03-20 17:52:40,904 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 17:52:40,904 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:52:40,905 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:52:40,906 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 17:52:40,906 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-03-20 17:52:41,386 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 17:52:41,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:52:41,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 17:52:41,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:52:42,005 INFO L134 CoverageAnalysis]: Checked inductivity of 15678 backedges. 265 proven. 1 refuted. 0 times theorem prover too weak. 15412 trivial. 0 not checked. [2022-03-20 17:52:42,006 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:52:42,561 INFO L134 CoverageAnalysis]: Checked inductivity of 15678 backedges. 265 proven. 1 refuted. 0 times theorem prover too weak. 15412 trivial. 0 not checked. [2022-03-20 17:52:42,561 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1537090822] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:52:42,561 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:52:42,562 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 7, 7] total 80 [2022-03-20 17:52:42,562 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:52:42,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [478097524] [2022-03-20 17:52:42,562 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [478097524] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:52:42,562 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:52:42,562 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [72] imperfect sequences [] total 72 [2022-03-20 17:52:42,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253337023] [2022-03-20 17:52:42,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:52:42,563 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-03-20 17:52:42,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:52:42,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-03-20 17:52:42,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2444, Invalid=3876, Unknown=0, NotChecked=0, Total=6320 [2022-03-20 17:52:42,564 INFO L87 Difference]: Start difference. First operand 1567 states and 2238 transitions. Second operand has 72 states, 72 states have (on average 2.1527777777777777) internal successors, (155), 70 states have internal predecessors, (155), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 17:52:49,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:52:49,080 INFO L93 Difference]: Finished difference Result 3048 states and 4483 transitions. [2022-03-20 17:52:49,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-03-20 17:52:49,080 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 2.1527777777777777) internal successors, (155), 70 states have internal predecessors, (155), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 491 [2022-03-20 17:52:49,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:52:49,083 INFO L225 Difference]: With dead ends: 3048 [2022-03-20 17:52:49,083 INFO L226 Difference]: Without dead ends: 1622 [2022-03-20 17:52:49,085 INFO L912 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 [2022-03-20 17:52:49,085 INFO L913 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 [2022-03-20 17:52:49,085 INFO L914 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] [2022-03-20 17:52:49,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1622 states. [2022-03-20 17:52:49,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1622 to 1590. [2022-03-20 17:52:49,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1590 states, 1378 states have (on average 1.349056603773585) internal successors, (1859), 1378 states have internal predecessors, (1859), 207 states have call successors, (207), 6 states have call predecessors, (207), 4 states have return successors, (205), 205 states have call predecessors, (205), 205 states have call successors, (205) [2022-03-20 17:52:49,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1590 states to 1590 states and 2271 transitions. [2022-03-20 17:52:49,833 INFO L78 Accepts]: Start accepts. Automaton has 1590 states and 2271 transitions. Word has length 491 [2022-03-20 17:52:49,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:52:49,834 INFO L478 AbstractCegarLoop]: Abstraction has 1590 states and 2271 transitions. [2022-03-20 17:52:49,834 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 2.1527777777777777) internal successors, (155), 70 states have internal predecessors, (155), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 17:52:49,834 INFO L276 IsEmpty]: Start isEmpty. Operand 1590 states and 2271 transitions. [2022-03-20 17:52:49,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 499 [2022-03-20 17:52:49,837 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:52:49,837 INFO L499 BasicCegarLoop]: trace histogram [68, 68, 68, 68, 68, 68, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:52:49,855 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Ended with exit code 0 [2022-03-20 17:52:50,037 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2022-03-20 17:52:50,038 INFO L403 AbstractCegarLoop]: === Iteration 71 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:52:50,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:52:50,038 INFO L85 PathProgramCache]: Analyzing trace with hash -1400749205, now seen corresponding path program 133 times [2022-03-20 17:52:50,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:52:50,038 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1104831718] [2022-03-20 17:52:50,039 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:52:50,039 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:52:50,039 INFO L85 PathProgramCache]: Analyzing trace with hash -1400749205, now seen corresponding path program 134 times [2022-03-20 17:52:50,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:52:50,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310619955] [2022-03-20 17:52:50,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:52:50,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:52:50,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:52:51,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:52:51,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:52:51,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 483 [2022-03-20 17:52:51,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:52:51,628 INFO L134 CoverageAnalysis]: Checked inductivity of 16150 backedges. 0 proven. 4624 refuted. 0 times theorem prover too weak. 11526 trivial. 0 not checked. [2022-03-20 17:52:51,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:52:51,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310619955] [2022-03-20 17:52:51,628 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310619955] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:52:51,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462486066] [2022-03-20 17:52:51,628 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 17:52:51,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:52:51,629 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:52:51,630 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 17:52:51,631 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-03-20 17:52:52,257 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 17:52:52,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:52:52,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 1878 conjuncts, 70 conjunts are in the unsatisfiable core [2022-03-20 17:52:52,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:52:52,835 INFO L134 CoverageAnalysis]: Checked inductivity of 16150 backedges. 0 proven. 4624 refuted. 0 times theorem prover too weak. 11526 trivial. 0 not checked. [2022-03-20 17:52:52,835 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:52:57,630 INFO L134 CoverageAnalysis]: Checked inductivity of 16150 backedges. 0 proven. 4624 refuted. 0 times theorem prover too weak. 11526 trivial. 0 not checked. [2022-03-20 17:52:57,630 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [462486066] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:52:57,630 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:52:57,630 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 71, 71] total 143 [2022-03-20 17:52:57,631 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:52:57,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1104831718] [2022-03-20 17:52:57,631 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1104831718] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:52:57,631 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:52:57,631 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [73] imperfect sequences [] total 73 [2022-03-20 17:52:57,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438101599] [2022-03-20 17:52:57,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:52:57,631 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-03-20 17:52:57,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:52:57,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-03-20 17:52:57,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9874, Invalid=10432, Unknown=0, NotChecked=0, Total=20306 [2022-03-20 17:52:57,634 INFO L87 Difference]: Start difference. First operand 1590 states and 2271 transitions. Second operand has 73 states, 73 states have (on average 2.1506849315068495) internal successors, (157), 71 states have internal predecessors, (157), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 17:53:05,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:53:05,037 INFO L93 Difference]: Finished difference Result 3092 states and 4548 transitions. [2022-03-20 17:53:05,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-03-20 17:53:05,037 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 2.1506849315068495) internal successors, (157), 71 states have internal predecessors, (157), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 498 [2022-03-20 17:53:05,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:53:05,040 INFO L225 Difference]: With dead ends: 3092 [2022-03-20 17:53:05,040 INFO L226 Difference]: Without dead ends: 1645 [2022-03-20 17:53:05,043 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1142 GetRequests, 930 SyntacticMatches, 0 SemanticMatches, 212 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3028 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=19821, Invalid=25761, Unknown=0, NotChecked=0, Total=45582 [2022-03-20 17:53:05,043 INFO L913 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, 2.4s IncrementalHoareTripleChecker+Time [2022-03-20 17:53:05,043 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [4184 Valid, 49 Invalid, 5928 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1989 Valid, 3939 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-03-20 17:53:05,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1645 states. [2022-03-20 17:53:05,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1645 to 1613. [2022-03-20 17:53:05,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1613 states, 1398 states have (on average 1.3490701001430616) internal successors, (1886), 1398 states have internal predecessors, (1886), 210 states have call successors, (210), 6 states have call predecessors, (210), 4 states have return successors, (208), 208 states have call predecessors, (208), 208 states have call successors, (208) [2022-03-20 17:53:05,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1613 states to 1613 states and 2304 transitions. [2022-03-20 17:53:05,810 INFO L78 Accepts]: Start accepts. Automaton has 1613 states and 2304 transitions. Word has length 498 [2022-03-20 17:53:05,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:53:05,811 INFO L478 AbstractCegarLoop]: Abstraction has 1613 states and 2304 transitions. [2022-03-20 17:53:05,811 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 2.1506849315068495) internal successors, (157), 71 states have internal predecessors, (157), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 17:53:05,811 INFO L276 IsEmpty]: Start isEmpty. Operand 1613 states and 2304 transitions. [2022-03-20 17:53:05,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 506 [2022-03-20 17:53:05,814 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:53:05,814 INFO L499 BasicCegarLoop]: trace histogram [69, 69, 69, 69, 69, 69, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:53:05,835 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Ended with exit code 0 [2022-03-20 17:53:06,015 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable70 [2022-03-20 17:53:06,015 INFO L403 AbstractCegarLoop]: === Iteration 72 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:53:06,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:53:06,015 INFO L85 PathProgramCache]: Analyzing trace with hash -90358015, now seen corresponding path program 135 times [2022-03-20 17:53:06,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:53:06,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1857402948] [2022-03-20 17:53:06,017 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:53:06,017 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:53:06,017 INFO L85 PathProgramCache]: Analyzing trace with hash -90358015, now seen corresponding path program 136 times [2022-03-20 17:53:06,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:53:06,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661140020] [2022-03-20 17:53:06,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:53:06,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:53:06,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:53:07,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:53:07,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:53:07,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 490 [2022-03-20 17:53:07,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:53:07,660 INFO L134 CoverageAnalysis]: Checked inductivity of 16629 backedges. 0 proven. 4761 refuted. 0 times theorem prover too weak. 11868 trivial. 0 not checked. [2022-03-20 17:53:07,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:53:07,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661140020] [2022-03-20 17:53:07,660 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661140020] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:53:07,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113045012] [2022-03-20 17:53:07,660 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 17:53:07,660 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:53:07,660 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:53:07,661 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 17:53:07,662 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-03-20 17:53:08,314 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 17:53:08,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:53:08,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 1904 conjuncts, 71 conjunts are in the unsatisfiable core [2022-03-20 17:53:08,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:53:08,894 INFO L134 CoverageAnalysis]: Checked inductivity of 16629 backedges. 0 proven. 4761 refuted. 0 times theorem prover too weak. 11868 trivial. 0 not checked. [2022-03-20 17:53:08,894 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:53:13,879 INFO L134 CoverageAnalysis]: Checked inductivity of 16629 backedges. 0 proven. 4761 refuted. 0 times theorem prover too weak. 11868 trivial. 0 not checked. [2022-03-20 17:53:13,879 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1113045012] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:53:13,879 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:53:13,879 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 72, 72] total 145 [2022-03-20 17:53:13,879 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:53:13,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1857402948] [2022-03-20 17:53:13,879 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1857402948] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:53:13,879 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:53:13,880 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [74] imperfect sequences [] total 74 [2022-03-20 17:53:13,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411277775] [2022-03-20 17:53:13,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:53:13,880 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-03-20 17:53:13,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:53:13,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-03-20 17:53:13,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10157, Invalid=10723, Unknown=0, NotChecked=0, Total=20880 [2022-03-20 17:53:13,883 INFO L87 Difference]: Start difference. First operand 1613 states and 2304 transitions. Second operand has 74 states, 74 states have (on average 2.1486486486486487) internal successors, (159), 72 states have internal predecessors, (159), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 17:53:21,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:53:21,554 INFO L93 Difference]: Finished difference Result 3136 states and 4613 transitions. [2022-03-20 17:53:21,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-03-20 17:53:21,554 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 2.1486486486486487) internal successors, (159), 72 states have internal predecessors, (159), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 505 [2022-03-20 17:53:21,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:53:21,558 INFO L225 Difference]: With dead ends: 3136 [2022-03-20 17:53:21,558 INFO L226 Difference]: Without dead ends: 1668 [2022-03-20 17:53:21,562 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1158 GetRequests, 943 SyntacticMatches, 0 SemanticMatches, 215 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3107 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=20388, Invalid=26484, Unknown=0, NotChecked=0, Total=46872 [2022-03-20 17:53:21,563 INFO L913 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 [2022-03-20 17:53:21,563 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [4055 Valid, 59 Invalid, 5691 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1772 Valid, 3919 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-03-20 17:53:21,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1668 states. [2022-03-20 17:53:22,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1668 to 1636. [2022-03-20 17:53:22,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1636 states, 1418 states have (on average 1.349083215796897) internal successors, (1913), 1418 states have internal predecessors, (1913), 213 states have call successors, (213), 6 states have call predecessors, (213), 4 states have return successors, (211), 211 states have call predecessors, (211), 211 states have call successors, (211) [2022-03-20 17:53:22,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1636 states to 1636 states and 2337 transitions. [2022-03-20 17:53:22,353 INFO L78 Accepts]: Start accepts. Automaton has 1636 states and 2337 transitions. Word has length 505 [2022-03-20 17:53:22,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:53:22,354 INFO L478 AbstractCegarLoop]: Abstraction has 1636 states and 2337 transitions. [2022-03-20 17:53:22,354 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 2.1486486486486487) internal successors, (159), 72 states have internal predecessors, (159), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 17:53:22,354 INFO L276 IsEmpty]: Start isEmpty. Operand 1636 states and 2337 transitions. [2022-03-20 17:53:22,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 513 [2022-03-20 17:53:22,358 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:53:22,358 INFO L499 BasicCegarLoop]: trace histogram [70, 70, 70, 70, 70, 70, 70, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:53:22,381 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2022-03-20 17:53:22,563 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:53:22,563 INFO L403 AbstractCegarLoop]: === Iteration 73 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:53:22,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:53:22,564 INFO L85 PathProgramCache]: Analyzing trace with hash 1168172591, now seen corresponding path program 137 times [2022-03-20 17:53:22,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:53:22,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1544292410] [2022-03-20 17:53:22,565 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:53:22,565 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:53:22,565 INFO L85 PathProgramCache]: Analyzing trace with hash 1168172591, now seen corresponding path program 138 times [2022-03-20 17:53:22,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:53:22,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970331162] [2022-03-20 17:53:22,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:53:22,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:53:22,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:53:24,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:53:24,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:53:24,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 497 [2022-03-20 17:53:24,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:53:24,313 INFO L134 CoverageAnalysis]: Checked inductivity of 17115 backedges. 0 proven. 4900 refuted. 0 times theorem prover too weak. 12215 trivial. 0 not checked. [2022-03-20 17:53:24,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:53:24,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970331162] [2022-03-20 17:53:24,313 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970331162] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:53:24,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493021294] [2022-03-20 17:53:24,313 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 17:53:24,314 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:53:24,314 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:53:24,320 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 17:53:24,323 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-03-20 17:53:24,856 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 17:53:24,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:53:24,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 17:53:24,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:53:25,513 INFO L134 CoverageAnalysis]: Checked inductivity of 17115 backedges. 277 proven. 1 refuted. 0 times theorem prover too weak. 16837 trivial. 0 not checked. [2022-03-20 17:53:25,514 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:53:26,109 INFO L134 CoverageAnalysis]: Checked inductivity of 17115 backedges. 277 proven. 1 refuted. 0 times theorem prover too weak. 16837 trivial. 0 not checked. [2022-03-20 17:53:26,109 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1493021294] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:53:26,109 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:53:26,109 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 7, 7] total 83 [2022-03-20 17:53:26,109 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:53:26,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1544292410] [2022-03-20 17:53:26,110 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1544292410] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:53:26,110 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:53:26,110 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [75] imperfect sequences [] total 75 [2022-03-20 17:53:26,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267000447] [2022-03-20 17:53:26,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:53:26,110 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-03-20 17:53:26,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:53:26,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-03-20 17:53:26,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2657, Invalid=4149, Unknown=0, NotChecked=0, Total=6806 [2022-03-20 17:53:26,112 INFO L87 Difference]: Start difference. First operand 1636 states and 2337 transitions. Second operand has 75 states, 75 states have (on average 2.1466666666666665) internal successors, (161), 73 states have internal predecessors, (161), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 17:53:33,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:53:33,074 INFO L93 Difference]: Finished difference Result 3180 states and 4678 transitions. [2022-03-20 17:53:33,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-03-20 17:53:33,075 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 2.1466666666666665) internal successors, (161), 73 states have internal predecessors, (161), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 512 [2022-03-20 17:53:33,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:53:33,078 INFO L225 Difference]: With dead ends: 3180 [2022-03-20 17:53:33,078 INFO L226 Difference]: Without dead ends: 1691 [2022-03-20 17:53:33,082 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1174 GetRequests, 1019 SyntacticMatches, 1 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3477 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=8062, Invalid=16118, Unknown=0, NotChecked=0, Total=24180 [2022-03-20 17:53:33,082 INFO L913 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 [2022-03-20 17:53:33,082 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [3909 Valid, 57 Invalid, 6075 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1820 Valid, 4255 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-03-20 17:53:33,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1691 states. [2022-03-20 17:53:33,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1691 to 1659. [2022-03-20 17:53:33,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1659 states, 1438 states have (on average 1.349095966620306) internal successors, (1940), 1438 states have internal predecessors, (1940), 216 states have call successors, (216), 6 states have call predecessors, (216), 4 states have return successors, (214), 214 states have call predecessors, (214), 214 states have call successors, (214) [2022-03-20 17:53:33,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1659 states to 1659 states and 2370 transitions. [2022-03-20 17:53:33,889 INFO L78 Accepts]: Start accepts. Automaton has 1659 states and 2370 transitions. Word has length 512 [2022-03-20 17:53:33,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:53:33,889 INFO L478 AbstractCegarLoop]: Abstraction has 1659 states and 2370 transitions. [2022-03-20 17:53:33,889 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 2.1466666666666665) internal successors, (161), 73 states have internal predecessors, (161), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 17:53:33,889 INFO L276 IsEmpty]: Start isEmpty. Operand 1659 states and 2370 transitions. [2022-03-20 17:53:33,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 520 [2022-03-20 17:53:33,892 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:53:33,893 INFO L499 BasicCegarLoop]: trace histogram [71, 71, 71, 71, 71, 71, 71, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:53:33,911 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Ended with exit code 0 [2022-03-20 17:53:34,093 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:53:34,093 INFO L403 AbstractCegarLoop]: === Iteration 74 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:53:34,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:53:34,093 INFO L85 PathProgramCache]: Analyzing trace with hash -412825027, now seen corresponding path program 139 times [2022-03-20 17:53:34,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:53:34,093 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [258397918] [2022-03-20 17:53:34,095 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:53:34,095 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:53:34,095 INFO L85 PathProgramCache]: Analyzing trace with hash -412825027, now seen corresponding path program 140 times [2022-03-20 17:53:34,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:53:34,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196012839] [2022-03-20 17:53:34,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:53:34,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:53:34,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:53:35,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:53:35,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:53:35,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 504 [2022-03-20 17:53:35,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:53:35,830 INFO L134 CoverageAnalysis]: Checked inductivity of 17608 backedges. 0 proven. 5041 refuted. 0 times theorem prover too weak. 12567 trivial. 0 not checked. [2022-03-20 17:53:35,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:53:35,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196012839] [2022-03-20 17:53:35,830 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196012839] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:53:35,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058802841] [2022-03-20 17:53:35,831 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 17:53:35,831 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:53:35,831 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:53:35,832 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 17:53:35,833 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-03-20 17:53:36,501 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 17:53:36,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:53:36,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 1956 conjuncts, 73 conjunts are in the unsatisfiable core [2022-03-20 17:53:36,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:53:37,081 INFO L134 CoverageAnalysis]: Checked inductivity of 17608 backedges. 0 proven. 5041 refuted. 0 times theorem prover too weak. 12567 trivial. 0 not checked. [2022-03-20 17:53:37,081 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:53:42,240 INFO L134 CoverageAnalysis]: Checked inductivity of 17608 backedges. 0 proven. 5041 refuted. 0 times theorem prover too weak. 12567 trivial. 0 not checked. [2022-03-20 17:53:42,240 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2058802841] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:53:42,240 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:53:42,241 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 74, 74] total 149 [2022-03-20 17:53:42,241 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:53:42,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [258397918] [2022-03-20 17:53:42,241 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [258397918] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:53:42,241 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:53:42,241 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [76] imperfect sequences [] total 76 [2022-03-20 17:53:42,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634766402] [2022-03-20 17:53:42,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:53:42,242 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-03-20 17:53:42,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:53:42,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-03-20 17:53:42,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10735, Invalid=11317, Unknown=0, NotChecked=0, Total=22052 [2022-03-20 17:53:42,246 INFO L87 Difference]: Start difference. First operand 1659 states and 2370 transitions. Second operand has 76 states, 76 states have (on average 2.1447368421052633) internal successors, (163), 74 states have internal predecessors, (163), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 17:53:50,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:53:50,413 INFO L93 Difference]: Finished difference Result 3224 states and 4743 transitions. [2022-03-20 17:53:50,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-03-20 17:53:50,414 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 2.1447368421052633) internal successors, (163), 74 states have internal predecessors, (163), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 519 [2022-03-20 17:53:50,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:53:50,417 INFO L225 Difference]: With dead ends: 3224 [2022-03-20 17:53:50,417 INFO L226 Difference]: Without dead ends: 1714 [2022-03-20 17:53:50,421 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1190 GetRequests, 969 SyntacticMatches, 0 SemanticMatches, 221 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3268 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=21546, Invalid=27960, Unknown=0, NotChecked=0, Total=49506 [2022-03-20 17:53:50,422 INFO L913 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, 2.5s IncrementalHoareTripleChecker+Time [2022-03-20 17:53:50,422 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [4392 Valid, 53 Invalid, 6170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2078 Valid, 4092 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-03-20 17:53:50,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1714 states. [2022-03-20 17:53:51,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1714 to 1682. [2022-03-20 17:53:51,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1682 states, 1458 states have (on average 1.3491083676268862) internal successors, (1967), 1458 states have internal predecessors, (1967), 219 states have call successors, (219), 6 states have call predecessors, (219), 4 states have return successors, (217), 217 states have call predecessors, (217), 217 states have call successors, (217) [2022-03-20 17:53:51,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1682 states to 1682 states and 2403 transitions. [2022-03-20 17:53:51,264 INFO L78 Accepts]: Start accepts. Automaton has 1682 states and 2403 transitions. Word has length 519 [2022-03-20 17:53:51,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:53:51,264 INFO L478 AbstractCegarLoop]: Abstraction has 1682 states and 2403 transitions. [2022-03-20 17:53:51,264 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 2.1447368421052633) internal successors, (163), 74 states have internal predecessors, (163), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 17:53:51,264 INFO L276 IsEmpty]: Start isEmpty. Operand 1682 states and 2403 transitions. [2022-03-20 17:53:51,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 527 [2022-03-20 17:53:51,269 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:53:51,269 INFO L499 BasicCegarLoop]: trace histogram [72, 72, 72, 72, 72, 72, 72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:53:51,296 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Ended with exit code 0 [2022-03-20 17:53:51,495 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:53:51,495 INFO L403 AbstractCegarLoop]: === Iteration 75 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:53:51,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:53:51,496 INFO L85 PathProgramCache]: Analyzing trace with hash -2077557517, now seen corresponding path program 141 times [2022-03-20 17:53:51,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:53:51,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [748103249] [2022-03-20 17:53:51,497 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:53:51,497 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:53:51,497 INFO L85 PathProgramCache]: Analyzing trace with hash -2077557517, now seen corresponding path program 142 times [2022-03-20 17:53:51,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:53:51,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828901321] [2022-03-20 17:53:51,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:53:51,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:53:51,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:53:53,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:53:53,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:53:53,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 511 [2022-03-20 17:53:53,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:53:53,275 INFO L134 CoverageAnalysis]: Checked inductivity of 18108 backedges. 0 proven. 5184 refuted. 0 times theorem prover too weak. 12924 trivial. 0 not checked. [2022-03-20 17:53:53,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:53:53,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828901321] [2022-03-20 17:53:53,275 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828901321] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:53:53,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529777032] [2022-03-20 17:53:53,275 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 17:53:53,275 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:53:53,275 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:53:53,276 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 17:53:53,277 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-03-20 17:53:53,992 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 17:53:53,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:53:54,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 1982 conjuncts, 74 conjunts are in the unsatisfiable core [2022-03-20 17:53:54,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:53:54,576 INFO L134 CoverageAnalysis]: Checked inductivity of 18108 backedges. 0 proven. 5184 refuted. 0 times theorem prover too weak. 12924 trivial. 0 not checked. [2022-03-20 17:53:54,576 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:53:59,829 INFO L134 CoverageAnalysis]: Checked inductivity of 18108 backedges. 0 proven. 5184 refuted. 0 times theorem prover too weak. 12924 trivial. 0 not checked. [2022-03-20 17:53:59,830 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [529777032] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:53:59,830 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:53:59,830 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 75, 75] total 151 [2022-03-20 17:53:59,830 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:53:59,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [748103249] [2022-03-20 17:53:59,830 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [748103249] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:53:59,830 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:53:59,830 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [77] imperfect sequences [] total 77 [2022-03-20 17:53:59,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76675695] [2022-03-20 17:53:59,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:53:59,831 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-03-20 17:53:59,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:53:59,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-03-20 17:53:59,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11030, Invalid=11620, Unknown=0, NotChecked=0, Total=22650 [2022-03-20 17:53:59,834 INFO L87 Difference]: Start difference. First operand 1682 states and 2403 transitions. Second operand has 77 states, 77 states have (on average 2.142857142857143) internal successors, (165), 75 states have internal predecessors, (165), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 17:54:08,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:54:08,194 INFO L93 Difference]: Finished difference Result 3268 states and 4808 transitions. [2022-03-20 17:54:08,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-03-20 17:54:08,195 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 2.142857142857143) internal successors, (165), 75 states have internal predecessors, (165), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 526 [2022-03-20 17:54:08,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:54:08,198 INFO L225 Difference]: With dead ends: 3268 [2022-03-20 17:54:08,198 INFO L226 Difference]: Without dead ends: 1737 [2022-03-20 17:54:08,201 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1206 GetRequests, 982 SyntacticMatches, 0 SemanticMatches, 224 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3350 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=22137, Invalid=28713, Unknown=0, NotChecked=0, Total=50850 [2022-03-20 17:54:08,201 INFO L913 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, 2.5s IncrementalHoareTripleChecker+Time [2022-03-20 17:54:08,202 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [4399 Valid, 53 Invalid, 6078 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2012 Valid, 4066 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-03-20 17:54:08,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1737 states. [2022-03-20 17:54:09,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1737 to 1705. [2022-03-20 17:54:09,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1705 states, 1478 states have (on average 1.3491204330175914) internal successors, (1994), 1478 states have internal predecessors, (1994), 222 states have call successors, (222), 6 states have call predecessors, (222), 4 states have return successors, (220), 220 states have call predecessors, (220), 220 states have call successors, (220) [2022-03-20 17:54:09,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1705 states to 1705 states and 2436 transitions. [2022-03-20 17:54:09,108 INFO L78 Accepts]: Start accepts. Automaton has 1705 states and 2436 transitions. Word has length 526 [2022-03-20 17:54:09,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:54:09,108 INFO L478 AbstractCegarLoop]: Abstraction has 1705 states and 2436 transitions. [2022-03-20 17:54:09,108 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 2.142857142857143) internal successors, (165), 75 states have internal predecessors, (165), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 17:54:09,108 INFO L276 IsEmpty]: Start isEmpty. Operand 1705 states and 2436 transitions. [2022-03-20 17:54:09,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 534 [2022-03-20 17:54:09,111 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:54:09,112 INFO L499 BasicCegarLoop]: trace histogram [73, 73, 73, 73, 73, 73, 73, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:54:09,132 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Ended with exit code 0 [2022-03-20 17:54:09,312 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2022-03-20 17:54:09,312 INFO L403 AbstractCegarLoop]: === Iteration 76 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:54:09,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:54:09,313 INFO L85 PathProgramCache]: Analyzing trace with hash 388055417, now seen corresponding path program 143 times [2022-03-20 17:54:09,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:54:09,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1830375204] [2022-03-20 17:54:09,314 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:54:09,314 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:54:09,314 INFO L85 PathProgramCache]: Analyzing trace with hash 388055417, now seen corresponding path program 144 times [2022-03-20 17:54:09,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:54:09,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491171548] [2022-03-20 17:54:09,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:54:09,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:54:09,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:54:11,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:54:11,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:54:11,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 518 [2022-03-20 17:54:11,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:54:11,120 INFO L134 CoverageAnalysis]: Checked inductivity of 18615 backedges. 0 proven. 5329 refuted. 0 times theorem prover too weak. 13286 trivial. 0 not checked. [2022-03-20 17:54:11,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:54:11,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491171548] [2022-03-20 17:54:11,121 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491171548] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:54:11,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479867222] [2022-03-20 17:54:11,121 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 17:54:11,121 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:54:11,121 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:54:11,122 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 17:54:11,122 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-03-20 17:54:11,673 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 17:54:11,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:54:11,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 17:54:11,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:54:12,345 INFO L134 CoverageAnalysis]: Checked inductivity of 18615 backedges. 289 proven. 1 refuted. 0 times theorem prover too weak. 18325 trivial. 0 not checked. [2022-03-20 17:54:12,345 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:54:12,952 INFO L134 CoverageAnalysis]: Checked inductivity of 18615 backedges. 289 proven. 1 refuted. 0 times theorem prover too weak. 18325 trivial. 0 not checked. [2022-03-20 17:54:12,952 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1479867222] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:54:12,952 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:54:12,952 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 7, 7] total 86 [2022-03-20 17:54:12,953 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:54:12,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1830375204] [2022-03-20 17:54:12,953 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1830375204] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:54:12,953 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:54:12,953 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [78] imperfect sequences [] total 78 [2022-03-20 17:54:12,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457718059] [2022-03-20 17:54:12,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:54:12,953 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2022-03-20 17:54:12,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:54:12,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2022-03-20 17:54:12,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2879, Invalid=4431, Unknown=0, NotChecked=0, Total=7310 [2022-03-20 17:54:12,956 INFO L87 Difference]: Start difference. First operand 1705 states and 2436 transitions. Second operand has 78 states, 78 states have (on average 2.141025641025641) internal successors, (167), 76 states have internal predecessors, (167), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 17:54:20,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:54:20,541 INFO L93 Difference]: Finished difference Result 3312 states and 4873 transitions. [2022-03-20 17:54:20,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-03-20 17:54:20,541 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 2.141025641025641) internal successors, (167), 76 states have internal predecessors, (167), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 533 [2022-03-20 17:54:20,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:54:20,544 INFO L225 Difference]: With dead ends: 3312 [2022-03-20 17:54:20,544 INFO L226 Difference]: Without dead ends: 1760 [2022-03-20 17:54:20,547 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1222 GetRequests, 1061 SyntacticMatches, 1 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3735 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=8734, Invalid=17348, Unknown=0, NotChecked=0, Total=26082 [2022-03-20 17:54:20,547 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 4273 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 4462 mSolverCounterSat, 2044 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s 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, 2.6s IncrementalHoareTripleChecker+Time [2022-03-20 17:54:20,547 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [4277 Valid, 57 Invalid, 6506 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2044 Valid, 4462 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-03-20 17:54:20,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1760 states. [2022-03-20 17:54:21,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1760 to 1728. [2022-03-20 17:54:21,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1728 states, 1498 states have (on average 1.34913217623498) internal successors, (2021), 1498 states have internal predecessors, (2021), 225 states have call successors, (225), 6 states have call predecessors, (225), 4 states have return successors, (223), 223 states have call predecessors, (223), 223 states have call successors, (223) [2022-03-20 17:54:21,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1728 states to 1728 states and 2469 transitions. [2022-03-20 17:54:21,483 INFO L78 Accepts]: Start accepts. Automaton has 1728 states and 2469 transitions. Word has length 533 [2022-03-20 17:54:21,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:54:21,483 INFO L478 AbstractCegarLoop]: Abstraction has 1728 states and 2469 transitions. [2022-03-20 17:54:21,483 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 2.141025641025641) internal successors, (167), 76 states have internal predecessors, (167), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 17:54:21,483 INFO L276 IsEmpty]: Start isEmpty. Operand 1728 states and 2469 transitions. [2022-03-20 17:54:21,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 541 [2022-03-20 17:54:21,487 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:54:21,487 INFO L499 BasicCegarLoop]: trace histogram [74, 74, 74, 74, 74, 74, 74, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:54:21,506 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2022-03-20 17:54:21,687 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:54:21,688 INFO L403 AbstractCegarLoop]: === Iteration 77 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:54:21,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:54:21,688 INFO L85 PathProgramCache]: Analyzing trace with hash -1946171465, now seen corresponding path program 145 times [2022-03-20 17:54:21,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:54:21,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [552140767] [2022-03-20 17:54:21,690 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:54:21,690 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:54:21,690 INFO L85 PathProgramCache]: Analyzing trace with hash -1946171465, now seen corresponding path program 146 times [2022-03-20 17:54:21,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:54:21,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931269891] [2022-03-20 17:54:21,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:54:21,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:54:21,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:54:23,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:54:23,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:54:23,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 525 [2022-03-20 17:54:23,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:54:23,582 INFO L134 CoverageAnalysis]: Checked inductivity of 19129 backedges. 0 proven. 5476 refuted. 0 times theorem prover too weak. 13653 trivial. 0 not checked. [2022-03-20 17:54:23,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:54:23,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931269891] [2022-03-20 17:54:23,582 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931269891] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:54:23,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954183968] [2022-03-20 17:54:23,582 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 17:54:23,582 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:54:23,582 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:54:23,583 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 17:54:23,584 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-03-20 17:54:24,299 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 17:54:24,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:54:24,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 2034 conjuncts, 76 conjunts are in the unsatisfiable core [2022-03-20 17:54:24,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:54:24,903 INFO L134 CoverageAnalysis]: Checked inductivity of 19129 backedges. 0 proven. 5476 refuted. 0 times theorem prover too weak. 13653 trivial. 0 not checked. [2022-03-20 17:54:24,903 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:54:30,506 INFO L134 CoverageAnalysis]: Checked inductivity of 19129 backedges. 0 proven. 5476 refuted. 0 times theorem prover too weak. 13653 trivial. 0 not checked. [2022-03-20 17:54:30,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [954183968] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:54:30,506 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:54:30,506 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 77, 77] total 155 [2022-03-20 17:54:30,507 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:54:30,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [552140767] [2022-03-20 17:54:30,507 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [552140767] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:54:30,507 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:54:30,507 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [79] imperfect sequences [] total 79 [2022-03-20 17:54:30,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041695328] [2022-03-20 17:54:30,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:54:30,507 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2022-03-20 17:54:30,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:54:30,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2022-03-20 17:54:30,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11632, Invalid=12238, Unknown=0, NotChecked=0, Total=23870 [2022-03-20 17:54:30,511 INFO L87 Difference]: Start difference. First operand 1728 states and 2469 transitions. Second operand has 79 states, 79 states have (on average 2.1392405063291138) internal successors, (169), 77 states have internal predecessors, (169), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 17:54:39,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:54:39,619 INFO L93 Difference]: Finished difference Result 3356 states and 4938 transitions. [2022-03-20 17:54:39,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-03-20 17:54:39,619 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 2.1392405063291138) internal successors, (169), 77 states have internal predecessors, (169), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 540 [2022-03-20 17:54:39,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:54:39,622 INFO L225 Difference]: With dead ends: 3356 [2022-03-20 17:54:39,622 INFO L226 Difference]: Without dead ends: 1783 [2022-03-20 17:54:39,626 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1238 GetRequests, 1008 SyntacticMatches, 0 SemanticMatches, 230 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3517 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=23343, Invalid=30249, Unknown=0, NotChecked=0, Total=53592 [2022-03-20 17:54:39,626 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 4226 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 4431 mSolverCounterSat, 2058 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s 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, 2.7s IncrementalHoareTripleChecker+Time [2022-03-20 17:54:39,626 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [4230 Valid, 53 Invalid, 6489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2058 Valid, 4431 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-03-20 17:54:39,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1783 states. [2022-03-20 17:54:40,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1783 to 1751. [2022-03-20 17:54:40,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1751 states, 1518 states have (on average 1.3491436100131753) internal successors, (2048), 1518 states have internal predecessors, (2048), 228 states have call successors, (228), 6 states have call predecessors, (228), 4 states have return successors, (226), 226 states have call predecessors, (226), 226 states have call successors, (226) [2022-03-20 17:54:40,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1751 states to 1751 states and 2502 transitions. [2022-03-20 17:54:40,530 INFO L78 Accepts]: Start accepts. Automaton has 1751 states and 2502 transitions. Word has length 540 [2022-03-20 17:54:40,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:54:40,530 INFO L478 AbstractCegarLoop]: Abstraction has 1751 states and 2502 transitions. [2022-03-20 17:54:40,530 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 2.1392405063291138) internal successors, (169), 77 states have internal predecessors, (169), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 17:54:40,530 INFO L276 IsEmpty]: Start isEmpty. Operand 1751 states and 2502 transitions. [2022-03-20 17:54:40,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 548 [2022-03-20 17:54:40,534 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:54:40,534 INFO L499 BasicCegarLoop]: trace histogram [75, 75, 75, 75, 75, 75, 75, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:54:40,555 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Ended with exit code 0 [2022-03-20 17:54:40,734 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:54:40,734 INFO L403 AbstractCegarLoop]: === Iteration 78 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:54:40,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:54:40,735 INFO L85 PathProgramCache]: Analyzing trace with hash 137585845, now seen corresponding path program 147 times [2022-03-20 17:54:40,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:54:40,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [36142439] [2022-03-20 17:54:40,736 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:54:40,736 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:54:40,736 INFO L85 PathProgramCache]: Analyzing trace with hash 137585845, now seen corresponding path program 148 times [2022-03-20 17:54:40,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:54:40,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503054485] [2022-03-20 17:54:40,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:54:40,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:54:40,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:54:42,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:54:42,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:54:42,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 532 [2022-03-20 17:54:42,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:54:42,635 INFO L134 CoverageAnalysis]: Checked inductivity of 19650 backedges. 0 proven. 5625 refuted. 0 times theorem prover too weak. 14025 trivial. 0 not checked. [2022-03-20 17:54:42,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:54:42,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503054485] [2022-03-20 17:54:42,636 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503054485] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:54:42,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2009027860] [2022-03-20 17:54:42,636 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 17:54:42,636 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:54:42,636 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:54:42,637 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 17:54:42,638 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-03-20 17:54:43,392 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 17:54:43,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:54:43,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 2060 conjuncts, 77 conjunts are in the unsatisfiable core [2022-03-20 17:54:43,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:54:44,094 INFO L134 CoverageAnalysis]: Checked inductivity of 19650 backedges. 0 proven. 14024 refuted. 0 times theorem prover too weak. 5626 trivial. 0 not checked. [2022-03-20 17:54:44,094 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:54:49,775 INFO L134 CoverageAnalysis]: Checked inductivity of 19650 backedges. 0 proven. 14024 refuted. 0 times theorem prover too weak. 5626 trivial. 0 not checked. [2022-03-20 17:54:49,775 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2009027860] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:54:49,775 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:54:49,776 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 78, 78] total 157 [2022-03-20 17:54:49,776 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:54:49,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [36142439] [2022-03-20 17:54:49,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [36142439] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:54:49,776 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:54:49,776 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [80] imperfect sequences [] total 80 [2022-03-20 17:54:49,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717529830] [2022-03-20 17:54:49,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:54:49,776 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2022-03-20 17:54:49,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:54:49,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2022-03-20 17:54:49,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11939, Invalid=12553, Unknown=0, NotChecked=0, Total=24492 [2022-03-20 17:54:49,780 INFO L87 Difference]: Start difference. First operand 1751 states and 2502 transitions. Second operand has 80 states, 80 states have (on average 2.1375) internal successors, (171), 78 states have internal predecessors, (171), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 17:54:59,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:54:59,169 INFO L93 Difference]: Finished difference Result 3400 states and 5003 transitions. [2022-03-20 17:54:59,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-03-20 17:54:59,170 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 2.1375) internal successors, (171), 78 states have internal predecessors, (171), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 547 [2022-03-20 17:54:59,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:54:59,173 INFO L225 Difference]: With dead ends: 3400 [2022-03-20 17:54:59,173 INFO L226 Difference]: Without dead ends: 1806 [2022-03-20 17:54:59,176 INFO L912 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 [2022-03-20 17:54:59,177 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 4249 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 4820 mSolverCounterSat, 1940 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s 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 [2022-03-20 17:54:59,177 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [4253 Valid, 57 Invalid, 6760 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1940 Valid, 4820 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-03-20 17:54:59,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1806 states. [2022-03-20 17:55:00,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1806 to 1774. [2022-03-20 17:55:00,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1774 states, 1538 states have (on average 1.349154746423927) internal successors, (2075), 1538 states have internal predecessors, (2075), 231 states have call successors, (231), 6 states have call predecessors, (231), 4 states have return successors, (229), 229 states have call predecessors, (229), 229 states have call successors, (229) [2022-03-20 17:55:00,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1774 states to 1774 states and 2535 transitions. [2022-03-20 17:55:00,113 INFO L78 Accepts]: Start accepts. Automaton has 1774 states and 2535 transitions. Word has length 547 [2022-03-20 17:55:00,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:55:00,113 INFO L478 AbstractCegarLoop]: Abstraction has 1774 states and 2535 transitions. [2022-03-20 17:55:00,113 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 2.1375) internal successors, (171), 78 states have internal predecessors, (171), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 17:55:00,113 INFO L276 IsEmpty]: Start isEmpty. Operand 1774 states and 2535 transitions. [2022-03-20 17:55:00,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 555 [2022-03-20 17:55:00,117 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:55:00,117 INFO L499 BasicCegarLoop]: trace histogram [76, 76, 76, 76, 76, 76, 76, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:55:00,139 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2022-03-20 17:55:00,317 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2022-03-20 17:55:00,318 INFO L403 AbstractCegarLoop]: === Iteration 79 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:55:00,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:55:00,318 INFO L85 PathProgramCache]: Analyzing trace with hash -444692869, now seen corresponding path program 149 times [2022-03-20 17:55:00,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:55:00,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [574083331] [2022-03-20 17:55:00,319 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:55:00,319 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:55:00,319 INFO L85 PathProgramCache]: Analyzing trace with hash -444692869, now seen corresponding path program 150 times [2022-03-20 17:55:00,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:55:00,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36879704] [2022-03-20 17:55:00,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:55:00,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:55:00,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:55:02,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:55:02,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:55:02,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 539 [2022-03-20 17:55:02,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:55:02,306 INFO L134 CoverageAnalysis]: Checked inductivity of 20178 backedges. 0 proven. 5776 refuted. 0 times theorem prover too weak. 14402 trivial. 0 not checked. [2022-03-20 17:55:02,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:55:02,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36879704] [2022-03-20 17:55:02,306 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36879704] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:55:02,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920461037] [2022-03-20 17:55:02,307 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 17:55:02,307 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:55:02,307 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:55:02,308 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 17:55:02,308 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2022-03-20 17:55:02,901 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 17:55:02,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:55:02,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 17:55:02,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:55:03,634 INFO L134 CoverageAnalysis]: Checked inductivity of 20178 backedges. 301 proven. 1 refuted. 0 times theorem prover too weak. 19876 trivial. 0 not checked. [2022-03-20 17:55:03,634 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:55:04,251 INFO L134 CoverageAnalysis]: Checked inductivity of 20178 backedges. 301 proven. 1 refuted. 0 times theorem prover too weak. 19876 trivial. 0 not checked. [2022-03-20 17:55:04,252 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1920461037] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:55:04,252 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:55:04,252 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 7, 7] total 89 [2022-03-20 17:55:04,252 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:55:04,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [574083331] [2022-03-20 17:55:04,252 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [574083331] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:55:04,252 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:55:04,252 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [81] imperfect sequences [] total 81 [2022-03-20 17:55:04,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235913133] [2022-03-20 17:55:04,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:55:04,253 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2022-03-20 17:55:04,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:55:04,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2022-03-20 17:55:04,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3110, Invalid=4722, Unknown=0, NotChecked=0, Total=7832 [2022-03-20 17:55:04,254 INFO L87 Difference]: Start difference. First operand 1774 states and 2535 transitions. Second operand has 81 states, 81 states have (on average 2.1358024691358026) internal successors, (173), 79 states have internal predecessors, (173), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 17:55:12,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:55:12,432 INFO L93 Difference]: Finished difference Result 3444 states and 5068 transitions. [2022-03-20 17:55:12,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-03-20 17:55:12,432 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 2.1358024691358026) internal successors, (173), 79 states have internal predecessors, (173), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 554 [2022-03-20 17:55:12,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:55:12,435 INFO L225 Difference]: With dead ends: 3444 [2022-03-20 17:55:12,435 INFO L226 Difference]: Without dead ends: 1829 [2022-03-20 17:55:12,438 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1270 GetRequests, 1103 SyntacticMatches, 1 SemanticMatches, 166 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4002 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=9433, Invalid=18623, Unknown=0, NotChecked=0, Total=28056 [2022-03-20 17:55:12,438 INFO L913 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 [2022-03-20 17:55:12,438 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [4343 Valid, 57 Invalid, 6535 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1923 Valid, 4612 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-03-20 17:55:12,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1829 states. [2022-03-20 17:55:13,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1829 to 1797. [2022-03-20 17:55:13,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1797 states, 1558 states have (on average 1.3491655969191272) internal successors, (2102), 1558 states have internal predecessors, (2102), 234 states have call successors, (234), 6 states have call predecessors, (234), 4 states have return successors, (232), 232 states have call predecessors, (232), 232 states have call successors, (232) [2022-03-20 17:55:13,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1797 states to 1797 states and 2568 transitions. [2022-03-20 17:55:13,385 INFO L78 Accepts]: Start accepts. Automaton has 1797 states and 2568 transitions. Word has length 554 [2022-03-20 17:55:13,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:55:13,385 INFO L478 AbstractCegarLoop]: Abstraction has 1797 states and 2568 transitions. [2022-03-20 17:55:13,385 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 2.1358024691358026) internal successors, (173), 79 states have internal predecessors, (173), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 17:55:13,385 INFO L276 IsEmpty]: Start isEmpty. Operand 1797 states and 2568 transitions. [2022-03-20 17:55:13,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 562 [2022-03-20 17:55:13,390 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:55:13,390 INFO L499 BasicCegarLoop]: trace histogram [77, 77, 77, 77, 77, 77, 77, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:55:13,419 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Forceful destruction successful, exit code 0 [2022-03-20 17:55:13,603 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2022-03-20 17:55:13,603 INFO L403 AbstractCegarLoop]: === Iteration 80 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:55:13,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:55:13,604 INFO L85 PathProgramCache]: Analyzing trace with hash 41677809, now seen corresponding path program 151 times [2022-03-20 17:55:13,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:55:13,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1158357] [2022-03-20 17:55:13,605 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:55:13,605 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:55:13,605 INFO L85 PathProgramCache]: Analyzing trace with hash 41677809, now seen corresponding path program 152 times [2022-03-20 17:55:13,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:55:13,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861022405] [2022-03-20 17:55:13,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:55:13,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:55:13,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:55:15,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:55:15,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:55:15,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 546 [2022-03-20 17:55:15,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:55:15,616 INFO L134 CoverageAnalysis]: Checked inductivity of 20713 backedges. 0 proven. 5929 refuted. 0 times theorem prover too weak. 14784 trivial. 0 not checked. [2022-03-20 17:55:15,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:55:15,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861022405] [2022-03-20 17:55:15,616 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861022405] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:55:15,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453628854] [2022-03-20 17:55:15,616 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 17:55:15,616 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:55:15,617 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:55:15,618 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 17:55:15,618 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2022-03-20 17:55:16,373 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 17:55:16,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:55:16,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 2112 conjuncts, 79 conjunts are in the unsatisfiable core [2022-03-20 17:55:16,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:55:17,011 INFO L134 CoverageAnalysis]: Checked inductivity of 20713 backedges. 0 proven. 5929 refuted. 0 times theorem prover too weak. 14784 trivial. 0 not checked. [2022-03-20 17:55:17,011 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:55:23,088 INFO L134 CoverageAnalysis]: Checked inductivity of 20713 backedges. 0 proven. 5929 refuted. 0 times theorem prover too weak. 14784 trivial. 0 not checked. [2022-03-20 17:55:23,088 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1453628854] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:55:23,088 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:55:23,089 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 80, 80] total 161 [2022-03-20 17:55:23,089 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:55:23,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1158357] [2022-03-20 17:55:23,089 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1158357] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:55:23,089 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:55:23,089 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [82] imperfect sequences [] total 82 [2022-03-20 17:55:23,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805506868] [2022-03-20 17:55:23,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:55:23,089 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2022-03-20 17:55:23,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:55:23,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2022-03-20 17:55:23,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12565, Invalid=13195, Unknown=0, NotChecked=0, Total=25760 [2022-03-20 17:55:23,092 INFO L87 Difference]: Start difference. First operand 1797 states and 2568 transitions. Second operand has 82 states, 82 states have (on average 2.1341463414634148) internal successors, (175), 80 states have internal predecessors, (175), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 17:55:33,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:55:33,205 INFO L93 Difference]: Finished difference Result 3488 states and 5133 transitions. [2022-03-20 17:55:33,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-03-20 17:55:33,205 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 2.1341463414634148) internal successors, (175), 80 states have internal predecessors, (175), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 561 [2022-03-20 17:55:33,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:55:33,208 INFO L225 Difference]: With dead ends: 3488 [2022-03-20 17:55:33,208 INFO L226 Difference]: Without dead ends: 1852 [2022-03-20 17:55:33,213 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1286 GetRequests, 1047 SyntacticMatches, 0 SemanticMatches, 239 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3775 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=25212, Invalid=32628, Unknown=0, NotChecked=0, Total=57840 [2022-03-20 17:55:33,213 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 4679 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 4512 mSolverCounterSat, 2189 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s 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 [2022-03-20 17:55:33,213 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [4683 Valid, 51 Invalid, 6701 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2189 Valid, 4512 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-03-20 17:55:33,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1852 states. [2022-03-20 17:55:34,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1852 to 1820. [2022-03-20 17:55:34,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1820 states, 1578 states have (on average 1.3491761723700888) internal successors, (2129), 1578 states have internal predecessors, (2129), 237 states have call successors, (237), 6 states have call predecessors, (237), 4 states have return successors, (235), 235 states have call predecessors, (235), 235 states have call successors, (235) [2022-03-20 17:55:34,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1820 states to 1820 states and 2601 transitions. [2022-03-20 17:55:34,196 INFO L78 Accepts]: Start accepts. Automaton has 1820 states and 2601 transitions. Word has length 561 [2022-03-20 17:55:34,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:55:34,196 INFO L478 AbstractCegarLoop]: Abstraction has 1820 states and 2601 transitions. [2022-03-20 17:55:34,196 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 2.1341463414634148) internal successors, (175), 80 states have internal predecessors, (175), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 17:55:34,197 INFO L276 IsEmpty]: Start isEmpty. Operand 1820 states and 2601 transitions. [2022-03-20 17:55:34,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 569 [2022-03-20 17:55:34,200 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:55:34,200 INFO L499 BasicCegarLoop]: trace histogram [78, 78, 78, 78, 78, 78, 78, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:55:34,222 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Ended with exit code 0 [2022-03-20 17:55:34,401 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:55:34,401 INFO L403 AbstractCegarLoop]: === Iteration 81 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:55:34,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:55:34,401 INFO L85 PathProgramCache]: Analyzing trace with hash 562460991, now seen corresponding path program 153 times [2022-03-20 17:55:34,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:55:34,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1057833385] [2022-03-20 17:55:34,402 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:55:34,402 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:55:34,403 INFO L85 PathProgramCache]: Analyzing trace with hash 562460991, now seen corresponding path program 154 times [2022-03-20 17:55:34,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:55:34,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733489789] [2022-03-20 17:55:34,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:55:34,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:55:34,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:55:36,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:55:36,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:55:36,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 553 [2022-03-20 17:55:36,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:55:36,472 INFO L134 CoverageAnalysis]: Checked inductivity of 21255 backedges. 0 proven. 6084 refuted. 0 times theorem prover too weak. 15171 trivial. 0 not checked. [2022-03-20 17:55:36,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:55:36,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733489789] [2022-03-20 17:55:36,473 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733489789] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:55:36,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1277989883] [2022-03-20 17:55:36,473 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 17:55:36,473 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:55:36,473 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:55:36,474 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 17:55:36,475 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2022-03-20 17:55:37,316 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 17:55:37,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:55:37,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 2138 conjuncts, 80 conjunts are in the unsatisfiable core [2022-03-20 17:55:37,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:55:37,953 INFO L134 CoverageAnalysis]: Checked inductivity of 21255 backedges. 0 proven. 6084 refuted. 0 times theorem prover too weak. 15171 trivial. 0 not checked. [2022-03-20 17:55:37,953 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:55:44,085 INFO L134 CoverageAnalysis]: Checked inductivity of 21255 backedges. 0 proven. 6084 refuted. 0 times theorem prover too weak. 15171 trivial. 0 not checked. [2022-03-20 17:55:44,085 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1277989883] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:55:44,086 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:55:44,086 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 81, 81] total 163 [2022-03-20 17:55:44,086 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:55:44,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1057833385] [2022-03-20 17:55:44,086 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1057833385] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:55:44,086 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:55:44,086 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [83] imperfect sequences [] total 83 [2022-03-20 17:55:44,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69969179] [2022-03-20 17:55:44,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:55:44,087 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2022-03-20 17:55:44,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:55:44,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2022-03-20 17:55:44,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12884, Invalid=13522, Unknown=0, NotChecked=0, Total=26406 [2022-03-20 17:55:44,091 INFO L87 Difference]: Start difference. First operand 1820 states and 2601 transitions. Second operand has 83 states, 83 states have (on average 2.1325301204819276) internal successors, (177), 81 states have internal predecessors, (177), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 17:55:54,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:55:54,288 INFO L93 Difference]: Finished difference Result 3532 states and 5198 transitions. [2022-03-20 17:55:54,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-03-20 17:55:54,288 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 2.1325301204819276) internal successors, (177), 81 states have internal predecessors, (177), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 568 [2022-03-20 17:55:54,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:55:54,292 INFO L225 Difference]: With dead ends: 3532 [2022-03-20 17:55:54,292 INFO L226 Difference]: Without dead ends: 1875 [2022-03-20 17:55:54,303 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1302 GetRequests, 1060 SyntacticMatches, 0 SemanticMatches, 242 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3863 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=25851, Invalid=33441, Unknown=0, NotChecked=0, Total=59292 [2022-03-20 17:55:54,303 INFO L913 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 [2022-03-20 17:55:54,303 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [4727 Valid, 53 Invalid, 6752 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2151 Valid, 4601 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-03-20 17:55:54,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1875 states. [2022-03-20 17:55:55,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1875 to 1843. [2022-03-20 17:55:55,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1843 states, 1598 states have (on average 1.3491864831038798) internal successors, (2156), 1598 states have internal predecessors, (2156), 240 states have call successors, (240), 6 states have call predecessors, (240), 4 states have return successors, (238), 238 states have call predecessors, (238), 238 states have call successors, (238) [2022-03-20 17:55:55,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1843 states to 1843 states and 2634 transitions. [2022-03-20 17:55:55,311 INFO L78 Accepts]: Start accepts. Automaton has 1843 states and 2634 transitions. Word has length 568 [2022-03-20 17:55:55,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:55:55,311 INFO L478 AbstractCegarLoop]: Abstraction has 1843 states and 2634 transitions. [2022-03-20 17:55:55,311 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 2.1325301204819276) internal successors, (177), 81 states have internal predecessors, (177), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 17:55:55,312 INFO L276 IsEmpty]: Start isEmpty. Operand 1843 states and 2634 transitions. [2022-03-20 17:55:55,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 576 [2022-03-20 17:55:55,315 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:55:55,315 INFO L499 BasicCegarLoop]: trace histogram [79, 79, 79, 79, 79, 79, 79, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:55:55,337 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Ended with exit code 0 [2022-03-20 17:55:55,516 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:55:55,516 INFO L403 AbstractCegarLoop]: === Iteration 82 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:55:55,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:55:55,516 INFO L85 PathProgramCache]: Analyzing trace with hash 1935388461, now seen corresponding path program 155 times [2022-03-20 17:55:55,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:55:55,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1767163492] [2022-03-20 17:55:55,518 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:55:55,518 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:55:55,518 INFO L85 PathProgramCache]: Analyzing trace with hash 1935388461, now seen corresponding path program 156 times [2022-03-20 17:55:55,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:55:55,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765086189] [2022-03-20 17:55:55,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:55:55,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:55:55,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:55:57,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:55:57,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:55:57,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 560 [2022-03-20 17:55:57,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:55:57,782 INFO L134 CoverageAnalysis]: Checked inductivity of 21804 backedges. 0 proven. 6241 refuted. 0 times theorem prover too weak. 15563 trivial. 0 not checked. [2022-03-20 17:55:57,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:55:57,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765086189] [2022-03-20 17:55:57,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765086189] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:55:57,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736619230] [2022-03-20 17:55:57,783 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 17:55:57,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:55:57,783 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:55:57,784 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 17:55:57,784 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2022-03-20 17:55:58,447 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 17:55:58,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:55:58,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 17:55:58,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:55:59,169 INFO L134 CoverageAnalysis]: Checked inductivity of 21804 backedges. 313 proven. 1 refuted. 0 times theorem prover too weak. 21490 trivial. 0 not checked. [2022-03-20 17:55:59,170 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:55:59,805 INFO L134 CoverageAnalysis]: Checked inductivity of 21804 backedges. 313 proven. 1 refuted. 0 times theorem prover too weak. 21490 trivial. 0 not checked. [2022-03-20 17:55:59,806 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [736619230] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:55:59,806 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:55:59,806 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 7, 7] total 92 [2022-03-20 17:55:59,806 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:55:59,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1767163492] [2022-03-20 17:55:59,806 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1767163492] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:55:59,806 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:55:59,806 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [84] imperfect sequences [] total 84 [2022-03-20 17:55:59,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828265751] [2022-03-20 17:55:59,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:55:59,807 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2022-03-20 17:55:59,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:55:59,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2022-03-20 17:55:59,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3350, Invalid=5022, Unknown=0, NotChecked=0, Total=8372 [2022-03-20 17:55:59,808 INFO L87 Difference]: Start difference. First operand 1843 states and 2634 transitions. Second operand has 84 states, 84 states have (on average 2.130952380952381) internal successors, (179), 82 states have internal predecessors, (179), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 17:56:08,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:56:08,575 INFO L93 Difference]: Finished difference Result 3576 states and 5263 transitions. [2022-03-20 17:56:08,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-03-20 17:56:08,575 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 2.130952380952381) internal successors, (179), 82 states have internal predecessors, (179), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 575 [2022-03-20 17:56:08,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:56:08,579 INFO L225 Difference]: With dead ends: 3576 [2022-03-20 17:56:08,579 INFO L226 Difference]: Without dead ends: 1898 [2022-03-20 17:56:08,582 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1318 GetRequests, 1145 SyntacticMatches, 1 SemanticMatches, 172 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4278 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=10159, Invalid=19943, Unknown=0, NotChecked=0, Total=30102 [2022-03-20 17:56:08,582 INFO L913 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 [2022-03-20 17:56:08,582 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [4571 Valid, 57 Invalid, 6679 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2090 Valid, 4589 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-03-20 17:56:08,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1898 states. [2022-03-20 17:56:09,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1898 to 1866. [2022-03-20 17:56:09,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1866 states, 1618 states have (on average 1.3491965389369591) internal successors, (2183), 1618 states have internal predecessors, (2183), 243 states have call successors, (243), 6 states have call predecessors, (243), 4 states have return successors, (241), 241 states have call predecessors, (241), 241 states have call successors, (241) [2022-03-20 17:56:09,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1866 states to 1866 states and 2667 transitions. [2022-03-20 17:56:09,620 INFO L78 Accepts]: Start accepts. Automaton has 1866 states and 2667 transitions. Word has length 575 [2022-03-20 17:56:09,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:56:09,620 INFO L478 AbstractCegarLoop]: Abstraction has 1866 states and 2667 transitions. [2022-03-20 17:56:09,620 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 2.130952380952381) internal successors, (179), 82 states have internal predecessors, (179), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 17:56:09,620 INFO L276 IsEmpty]: Start isEmpty. Operand 1866 states and 2667 transitions. [2022-03-20 17:56:09,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 583 [2022-03-20 17:56:09,626 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:56:09,626 INFO L499 BasicCegarLoop]: trace histogram [80, 80, 80, 80, 80, 80, 80, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:56:09,659 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Forceful destruction successful, exit code 0 [2022-03-20 17:56:09,839 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable81 [2022-03-20 17:56:09,839 INFO L403 AbstractCegarLoop]: === Iteration 83 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:56:09,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:56:09,840 INFO L85 PathProgramCache]: Analyzing trace with hash 2104942595, now seen corresponding path program 157 times [2022-03-20 17:56:09,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:56:09,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1277094477] [2022-03-20 17:56:09,841 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:56:09,841 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:56:09,841 INFO L85 PathProgramCache]: Analyzing trace with hash 2104942595, now seen corresponding path program 158 times [2022-03-20 17:56:09,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:56:09,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797116866] [2022-03-20 17:56:09,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:56:09,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:56:09,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:56:12,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:56:12,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:56:12,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 567 [2022-03-20 17:56:12,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:56:12,141 INFO L134 CoverageAnalysis]: Checked inductivity of 22360 backedges. 0 proven. 6400 refuted. 0 times theorem prover too weak. 15960 trivial. 0 not checked. [2022-03-20 17:56:12,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:56:12,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797116866] [2022-03-20 17:56:12,141 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797116866] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:56:12,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204919905] [2022-03-20 17:56:12,141 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 17:56:12,141 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:56:12,141 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:56:12,142 INFO L229 MonitoredProcess]: Starting monitored process 81 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 17:56:12,143 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2022-03-20 17:56:12,938 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 17:56:12,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:56:12,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 2190 conjuncts, 82 conjunts are in the unsatisfiable core [2022-03-20 17:56:12,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:56:13,589 INFO L134 CoverageAnalysis]: Checked inductivity of 22360 backedges. 0 proven. 6400 refuted. 0 times theorem prover too weak. 15960 trivial. 0 not checked. [2022-03-20 17:56:13,589 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:56:20,036 INFO L134 CoverageAnalysis]: Checked inductivity of 22360 backedges. 0 proven. 6400 refuted. 0 times theorem prover too weak. 15960 trivial. 0 not checked. [2022-03-20 17:56:20,037 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1204919905] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:56:20,037 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:56:20,037 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 83, 83] total 167 [2022-03-20 17:56:20,037 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:56:20,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1277094477] [2022-03-20 17:56:20,037 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1277094477] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:56:20,037 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:56:20,037 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [85] imperfect sequences [] total 85 [2022-03-20 17:56:20,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001994456] [2022-03-20 17:56:20,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:56:20,038 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2022-03-20 17:56:20,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:56:20,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2022-03-20 17:56:20,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13534, Invalid=14188, Unknown=0, NotChecked=0, Total=27722 [2022-03-20 17:56:20,040 INFO L87 Difference]: Start difference. First operand 1866 states and 2667 transitions. Second operand has 85 states, 85 states have (on average 2.1294117647058823) internal successors, (181), 83 states have internal predecessors, (181), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 17:56:30,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:56:30,714 INFO L93 Difference]: Finished difference Result 3620 states and 5328 transitions. [2022-03-20 17:56:30,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-03-20 17:56:30,714 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 2.1294117647058823) internal successors, (181), 83 states have internal predecessors, (181), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 582 [2022-03-20 17:56:30,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:56:30,718 INFO L225 Difference]: With dead ends: 3620 [2022-03-20 17:56:30,719 INFO L226 Difference]: Without dead ends: 1921 [2022-03-20 17:56:30,724 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1334 GetRequests, 1086 SyntacticMatches, 0 SemanticMatches, 248 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4042 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=27153, Invalid=35097, Unknown=0, NotChecked=0, Total=62250 [2022-03-20 17:56:30,725 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 4692 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 4742 mSolverCounterSat, 2293 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s 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 [2022-03-20 17:56:30,725 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [4696 Valid, 53 Invalid, 7035 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2293 Valid, 4742 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-03-20 17:56:30,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1921 states. [2022-03-20 17:56:31,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1921 to 1889. [2022-03-20 17:56:31,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1889 states, 1638 states have (on average 1.3492063492063493) internal successors, (2210), 1638 states have internal predecessors, (2210), 246 states have call successors, (246), 6 states have call predecessors, (246), 4 states have return successors, (244), 244 states have call predecessors, (244), 244 states have call successors, (244) [2022-03-20 17:56:31,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1889 states to 1889 states and 2700 transitions. [2022-03-20 17:56:31,861 INFO L78 Accepts]: Start accepts. Automaton has 1889 states and 2700 transitions. Word has length 582 [2022-03-20 17:56:31,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:56:31,862 INFO L478 AbstractCegarLoop]: Abstraction has 1889 states and 2700 transitions. [2022-03-20 17:56:31,862 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 2.1294117647058823) internal successors, (181), 83 states have internal predecessors, (181), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 17:56:31,862 INFO L276 IsEmpty]: Start isEmpty. Operand 1889 states and 2700 transitions. [2022-03-20 17:56:31,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 590 [2022-03-20 17:56:31,866 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:56:31,866 INFO L499 BasicCegarLoop]: trace histogram [81, 81, 81, 81, 81, 81, 81, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:56:31,888 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Ended with exit code 0 [2022-03-20 17:56:32,066 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:56:32,066 INFO L403 AbstractCegarLoop]: === Iteration 84 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:56:32,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:56:32,067 INFO L85 PathProgramCache]: Analyzing trace with hash 1236489833, now seen corresponding path program 159 times [2022-03-20 17:56:32,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:56:32,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [894221586] [2022-03-20 17:56:32,068 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:56:32,068 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:56:32,068 INFO L85 PathProgramCache]: Analyzing trace with hash 1236489833, now seen corresponding path program 160 times [2022-03-20 17:56:32,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:56:32,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999350708] [2022-03-20 17:56:32,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:56:32,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:56:32,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:56:34,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:56:34,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:56:34,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 574 [2022-03-20 17:56:34,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:56:34,271 INFO L134 CoverageAnalysis]: Checked inductivity of 22923 backedges. 0 proven. 6561 refuted. 0 times theorem prover too weak. 16362 trivial. 0 not checked. [2022-03-20 17:56:34,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:56:34,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999350708] [2022-03-20 17:56:34,271 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999350708] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:56:34,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305736912] [2022-03-20 17:56:34,272 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 17:56:34,272 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:56:34,272 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:56:34,273 INFO L229 MonitoredProcess]: Starting monitored process 82 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 17:56:34,273 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2022-03-20 17:56:35,090 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 17:56:35,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:56:35,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 2216 conjuncts, 83 conjunts are in the unsatisfiable core [2022-03-20 17:56:35,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:56:35,851 INFO L134 CoverageAnalysis]: Checked inductivity of 22923 backedges. 0 proven. 16361 refuted. 0 times theorem prover too weak. 6562 trivial. 0 not checked. [2022-03-20 17:56:35,851 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:56:42,490 INFO L134 CoverageAnalysis]: Checked inductivity of 22923 backedges. 0 proven. 16361 refuted. 0 times theorem prover too weak. 6562 trivial. 0 not checked. [2022-03-20 17:56:42,490 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [305736912] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:56:42,490 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:56:42,490 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 84, 84] total 169 [2022-03-20 17:56:42,490 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:56:42,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [894221586] [2022-03-20 17:56:42,490 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [894221586] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:56:42,490 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:56:42,491 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [86] imperfect sequences [] total 86 [2022-03-20 17:56:42,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468632154] [2022-03-20 17:56:42,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:56:42,491 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2022-03-20 17:56:42,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:56:42,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2022-03-20 17:56:42,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13865, Invalid=14527, Unknown=0, NotChecked=0, Total=28392 [2022-03-20 17:56:42,495 INFO L87 Difference]: Start difference. First operand 1889 states and 2700 transitions. Second operand has 86 states, 86 states have (on average 2.127906976744186) internal successors, (183), 84 states have internal predecessors, (183), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 17:56:53,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:56:53,482 INFO L93 Difference]: Finished difference Result 3664 states and 5393 transitions. [2022-03-20 17:56:53,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-03-20 17:56:53,483 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 [2022-03-20 17:56:53,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:56:53,486 INFO L225 Difference]: With dead ends: 3664 [2022-03-20 17:56:53,486 INFO L226 Difference]: Without dead ends: 1944 [2022-03-20 17:56:53,490 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1350 GetRequests, 1099 SyntacticMatches, 0 SemanticMatches, 251 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4133 ImplicationChecksByTransitivity, 10.3s TimeCoverageRelationStatistics Valid=27816, Invalid=35940, Unknown=0, NotChecked=0, Total=63756 [2022-03-20 17:56:53,490 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 4830 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 4725 mSolverCounterSat, 2288 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4834 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 7013 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2288 IncrementalHoareTripleChecker+Valid, 4725 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-03-20 17:56:53,490 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [4834 Valid, 51 Invalid, 7013 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2288 Valid, 4725 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-03-20 17:56:53,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1944 states. [2022-03-20 17:56:54,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1944 to 1912. [2022-03-20 17:56:54,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1912 states, 1658 states have (on average 1.3492159227985525) internal successors, (2237), 1658 states have internal predecessors, (2237), 249 states have call successors, (249), 6 states have call predecessors, (249), 4 states have return successors, (247), 247 states have call predecessors, (247), 247 states have call successors, (247) [2022-03-20 17:56:54,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1912 states to 1912 states and 2733 transitions. [2022-03-20 17:56:54,603 INFO L78 Accepts]: Start accepts. Automaton has 1912 states and 2733 transitions. Word has length 589 [2022-03-20 17:56:54,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:56:54,603 INFO L478 AbstractCegarLoop]: Abstraction has 1912 states and 2733 transitions. [2022-03-20 17:56:54,603 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 2.127906976744186) internal successors, (183), 84 states have internal predecessors, (183), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 17:56:54,603 INFO L276 IsEmpty]: Start isEmpty. Operand 1912 states and 2733 transitions. [2022-03-20 17:56:54,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 597 [2022-03-20 17:56:54,607 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:56:54,607 INFO L499 BasicCegarLoop]: trace histogram [82, 82, 82, 82, 82, 82, 82, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:56:54,629 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Forceful destruction successful, exit code 0 [2022-03-20 17:56:54,808 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:56:54,808 INFO L403 AbstractCegarLoop]: === Iteration 85 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:56:54,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:56:54,808 INFO L85 PathProgramCache]: Analyzing trace with hash -2026964281, now seen corresponding path program 161 times [2022-03-20 17:56:54,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:56:54,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1757172879] [2022-03-20 17:56:54,809 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:56:54,810 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:56:54,810 INFO L85 PathProgramCache]: Analyzing trace with hash -2026964281, now seen corresponding path program 162 times [2022-03-20 17:56:54,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:56:54,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751231029] [2022-03-20 17:56:54,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:56:54,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:56:54,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:56:57,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:56:57,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:56:57,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 581 [2022-03-20 17:56:57,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:56:57,060 INFO L134 CoverageAnalysis]: Checked inductivity of 23493 backedges. 0 proven. 6724 refuted. 0 times theorem prover too weak. 16769 trivial. 0 not checked. [2022-03-20 17:56:57,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:56:57,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751231029] [2022-03-20 17:56:57,060 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751231029] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:56:57,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105768871] [2022-03-20 17:56:57,061 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 17:56:57,061 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:56:57,061 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:56:57,062 INFO L229 MonitoredProcess]: Starting monitored process 83 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 17:56:57,062 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2022-03-20 17:56:57,731 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 17:56:57,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:56:57,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 17:56:57,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:56:58,505 INFO L134 CoverageAnalysis]: Checked inductivity of 23493 backedges. 325 proven. 1 refuted. 0 times theorem prover too weak. 23167 trivial. 0 not checked. [2022-03-20 17:56:58,505 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:56:59,205 INFO L134 CoverageAnalysis]: Checked inductivity of 23493 backedges. 325 proven. 1 refuted. 0 times theorem prover too weak. 23167 trivial. 0 not checked. [2022-03-20 17:56:59,205 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1105768871] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:56:59,205 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:56:59,205 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 7, 7] total 95 [2022-03-20 17:56:59,206 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:56:59,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1757172879] [2022-03-20 17:56:59,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1757172879] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:56:59,206 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:56:59,206 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [87] imperfect sequences [] total 87 [2022-03-20 17:56:59,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327549208] [2022-03-20 17:56:59,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:56:59,206 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2022-03-20 17:56:59,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:56:59,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2022-03-20 17:56:59,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3599, Invalid=5331, Unknown=0, NotChecked=0, Total=8930 [2022-03-20 17:56:59,207 INFO L87 Difference]: Start difference. First operand 1912 states and 2733 transitions. Second operand has 87 states, 87 states have (on average 2.1264367816091956) internal successors, (185), 85 states have internal predecessors, (185), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 17:57:08,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:57:08,642 INFO L93 Difference]: Finished difference Result 3708 states and 5458 transitions. [2022-03-20 17:57:08,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-03-20 17:57:08,642 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 2.1264367816091956) internal successors, (185), 85 states have internal predecessors, (185), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 596 [2022-03-20 17:57:08,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:57:08,645 INFO L225 Difference]: With dead ends: 3708 [2022-03-20 17:57:08,645 INFO L226 Difference]: Without dead ends: 1967 [2022-03-20 17:57:08,649 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1366 GetRequests, 1187 SyntacticMatches, 1 SemanticMatches, 178 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4563 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=10912, Invalid=21308, Unknown=0, NotChecked=0, Total=32220 [2022-03-20 17:57:08,649 INFO L913 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 [2022-03-20 17:57:08,649 INFO L914 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] [2022-03-20 17:57:08,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1967 states. [2022-03-20 17:57:09,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1967 to 1935. [2022-03-20 17:57:09,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1935 states, 1678 states have (on average 1.3492252681764005) internal successors, (2264), 1678 states have internal predecessors, (2264), 252 states have call successors, (252), 6 states have call predecessors, (252), 4 states have return successors, (250), 250 states have call predecessors, (250), 250 states have call successors, (250) [2022-03-20 17:57:09,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1935 states to 1935 states and 2766 transitions. [2022-03-20 17:57:09,875 INFO L78 Accepts]: Start accepts. Automaton has 1935 states and 2766 transitions. Word has length 596 [2022-03-20 17:57:09,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:57:09,875 INFO L478 AbstractCegarLoop]: Abstraction has 1935 states and 2766 transitions. [2022-03-20 17:57:09,875 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 87 states have (on average 2.1264367816091956) internal successors, (185), 85 states have internal predecessors, (185), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 17:57:09,876 INFO L276 IsEmpty]: Start isEmpty. Operand 1935 states and 2766 transitions. [2022-03-20 17:57:09,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 604 [2022-03-20 17:57:09,880 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:57:09,880 INFO L499 BasicCegarLoop]: trace histogram [83, 83, 83, 83, 83, 83, 83, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:57:09,899 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Ended with exit code 0 [2022-03-20 17:57:10,080 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable84 [2022-03-20 17:57:10,080 INFO L403 AbstractCegarLoop]: === Iteration 86 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:57:10,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:57:10,081 INFO L85 PathProgramCache]: Analyzing trace with hash 1373874597, now seen corresponding path program 163 times [2022-03-20 17:57:10,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:57:10,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1773857093] [2022-03-20 17:57:10,082 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:57:10,082 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:57:10,082 INFO L85 PathProgramCache]: Analyzing trace with hash 1373874597, now seen corresponding path program 164 times [2022-03-20 17:57:10,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:57:10,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065148503] [2022-03-20 17:57:10,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:57:10,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:57:10,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:57:12,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:57:12,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:57:12,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 588 [2022-03-20 17:57:12,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:57:12,475 INFO L134 CoverageAnalysis]: Checked inductivity of 24070 backedges. 0 proven. 6889 refuted. 0 times theorem prover too weak. 17181 trivial. 0 not checked. [2022-03-20 17:57:12,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:57:12,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065148503] [2022-03-20 17:57:12,476 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065148503] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:57:12,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1906919061] [2022-03-20 17:57:12,476 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 17:57:12,476 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:57:12,476 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:57:12,477 INFO L229 MonitoredProcess]: Starting monitored process 84 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 17:57:12,477 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2022-03-20 17:57:13,319 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 17:57:13,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:57:13,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 2268 conjuncts, 85 conjunts are in the unsatisfiable core [2022-03-20 17:57:13,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:57:13,990 INFO L134 CoverageAnalysis]: Checked inductivity of 24070 backedges. 0 proven. 6889 refuted. 0 times theorem prover too weak. 17181 trivial. 0 not checked. [2022-03-20 17:57:13,990 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:57:20,868 INFO L134 CoverageAnalysis]: Checked inductivity of 24070 backedges. 0 proven. 6889 refuted. 0 times theorem prover too weak. 17181 trivial. 0 not checked. [2022-03-20 17:57:20,868 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1906919061] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:57:20,868 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:57:20,868 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 86, 86] total 173 [2022-03-20 17:57:20,869 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:57:20,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1773857093] [2022-03-20 17:57:20,869 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1773857093] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:57:20,869 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:57:20,869 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [88] imperfect sequences [] total 88 [2022-03-20 17:57:20,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306185414] [2022-03-20 17:57:20,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:57:20,870 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2022-03-20 17:57:20,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:57:20,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2022-03-20 17:57:20,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14539, Invalid=15217, Unknown=0, NotChecked=0, Total=29756 [2022-03-20 17:57:20,873 INFO L87 Difference]: Start difference. First operand 1935 states and 2766 transitions. Second operand has 88 states, 88 states have (on average 2.125) internal successors, (187), 86 states have internal predecessors, (187), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 17:57:32,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:57:32,644 INFO L93 Difference]: Finished difference Result 3752 states and 5523 transitions. [2022-03-20 17:57:32,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-03-20 17:57:32,644 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 88 states have (on average 2.125) internal successors, (187), 86 states have internal predecessors, (187), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 603 [2022-03-20 17:57:32,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:57:32,648 INFO L225 Difference]: With dead ends: 3752 [2022-03-20 17:57:32,648 INFO L226 Difference]: Without dead ends: 1990 [2022-03-20 17:57:32,652 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1382 GetRequests, 1125 SyntacticMatches, 0 SemanticMatches, 257 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4318 ImplicationChecksByTransitivity, 10.7s TimeCoverageRelationStatistics Valid=29166, Invalid=37656, Unknown=0, NotChecked=0, Total=66822 [2022-03-20 17:57:32,652 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 4463 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 5506 mSolverCounterSat, 2062 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4467 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 7568 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2062 IncrementalHoareTripleChecker+Valid, 5506 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-03-20 17:57:32,652 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [4467 Valid, 61 Invalid, 7568 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2062 Valid, 5506 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-03-20 17:57:32,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1990 states. [2022-03-20 17:57:33,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1990 to 1958. [2022-03-20 17:57:33,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1958 states, 1698 states have (on average 1.3492343934040048) internal successors, (2291), 1698 states have internal predecessors, (2291), 255 states have call successors, (255), 6 states have call predecessors, (255), 4 states have return successors, (253), 253 states have call predecessors, (253), 253 states have call successors, (253) [2022-03-20 17:57:33,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1958 states to 1958 states and 2799 transitions. [2022-03-20 17:57:33,783 INFO L78 Accepts]: Start accepts. Automaton has 1958 states and 2799 transitions. Word has length 603 [2022-03-20 17:57:33,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:57:33,783 INFO L478 AbstractCegarLoop]: Abstraction has 1958 states and 2799 transitions. [2022-03-20 17:57:33,783 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 88 states have (on average 2.125) internal successors, (187), 86 states have internal predecessors, (187), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 17:57:33,784 INFO L276 IsEmpty]: Start isEmpty. Operand 1958 states and 2799 transitions. [2022-03-20 17:57:33,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 611 [2022-03-20 17:57:33,787 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:57:33,788 INFO L499 BasicCegarLoop]: trace histogram [84, 84, 84, 84, 84, 84, 84, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:57:33,809 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Ended with exit code 0 [2022-03-20 17:57:33,988 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:57:33,988 INFO L403 AbstractCegarLoop]: === Iteration 87 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:57:33,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:57:33,988 INFO L85 PathProgramCache]: Analyzing trace with hash -1056044661, now seen corresponding path program 165 times [2022-03-20 17:57:33,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:57:33,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1603968444] [2022-03-20 17:57:33,989 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:57:33,990 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:57:33,990 INFO L85 PathProgramCache]: Analyzing trace with hash -1056044661, now seen corresponding path program 166 times [2022-03-20 17:57:33,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:57:33,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149073205] [2022-03-20 17:57:33,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:57:33,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:57:34,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:57:36,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:57:36,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:57:36,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 595 [2022-03-20 17:57:36,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:57:36,406 INFO L134 CoverageAnalysis]: Checked inductivity of 24654 backedges. 0 proven. 7056 refuted. 0 times theorem prover too weak. 17598 trivial. 0 not checked. [2022-03-20 17:57:36,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:57:36,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149073205] [2022-03-20 17:57:36,406 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149073205] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:57:36,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489684430] [2022-03-20 17:57:36,406 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 17:57:36,406 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:57:36,407 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:57:36,413 INFO L229 MonitoredProcess]: Starting monitored process 85 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 17:57:36,413 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2022-03-20 17:57:37,282 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 17:57:37,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:57:37,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 2294 conjuncts, 86 conjunts are in the unsatisfiable core [2022-03-20 17:57:37,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:57:38,111 INFO L134 CoverageAnalysis]: Checked inductivity of 24654 backedges. 0 proven. 17597 refuted. 0 times theorem prover too weak. 7057 trivial. 0 not checked. [2022-03-20 17:57:38,111 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:57:45,205 INFO L134 CoverageAnalysis]: Checked inductivity of 24654 backedges. 0 proven. 17597 refuted. 0 times theorem prover too weak. 7057 trivial. 0 not checked. [2022-03-20 17:57:45,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1489684430] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:57:45,206 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:57:45,206 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 87, 87] total 175 [2022-03-20 17:57:45,206 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:57:45,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1603968444] [2022-03-20 17:57:45,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1603968444] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:57:45,206 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:57:45,207 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [89] imperfect sequences [] total 89 [2022-03-20 17:57:45,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429060214] [2022-03-20 17:57:45,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:57:45,207 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2022-03-20 17:57:45,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:57:45,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2022-03-20 17:57:45,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14882, Invalid=15568, Unknown=0, NotChecked=0, Total=30450 [2022-03-20 17:57:45,209 INFO L87 Difference]: Start difference. First operand 1958 states and 2799 transitions. Second operand has 89 states, 89 states have (on average 2.1235955056179776) internal successors, (189), 87 states have internal predecessors, (189), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2)