/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/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/n.c24.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-5d317bd [2022-03-18 11:39:24,874 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-18 11:39:24,876 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-18 11:39:24,910 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-18 11:39:24,911 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-18 11:39:24,912 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-18 11:39:24,914 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-18 11:39:24,916 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-18 11:39:24,917 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-18 11:39:24,920 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-18 11:39:24,921 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-18 11:39:24,922 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-18 11:39:24,922 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-18 11:39:24,924 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-18 11:39:24,925 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-18 11:39:24,939 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-18 11:39:24,940 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-18 11:39:24,940 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-18 11:39:24,941 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-18 11:39:24,942 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-18 11:39:24,943 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-18 11:39:24,945 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-18 11:39:24,945 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-18 11:39:24,946 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-18 11:39:24,947 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-18 11:39:24,953 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-03-18 11:39:24,953 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-03-18 11:39:24,953 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-03-18 11:39:24,954 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-03-18 11:39:24,954 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-03-18 11:39:24,955 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2022-03-18 11:39:24,958 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-18 11:39:24,959 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-18 11:39:24,960 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-18 11:39:24,960 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2022-03-18 11:39:24,983 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-18 11:39:24,983 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-18 11:39:24,983 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-03-18 11:39:24,983 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-03-18 11:39:24,985 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-18 11:39:24,985 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-18 11:39:24,985 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-18 11:39:24,985 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-18 11:39:24,985 INFO L138 SettingsManager]: * Use SBE=true [2022-03-18 11:39:24,986 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-18 11:39:24,986 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-18 11:39:24,986 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-18 11:39:24,986 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-18 11:39:24,986 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-18 11:39:24,986 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-18 11:39:24,986 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-18 11:39:24,986 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-18 11:39:24,987 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-18 11:39:24,988 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-18 11:39:24,988 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-18 11:39:24,988 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-18 11:39:24,988 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-18 11:39:24,988 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-18 11:39:24,988 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-18 11:39:24,988 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 11:39:24,988 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-18 11:39:24,988 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-18 11:39:24,988 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-18 11:39:24,989 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-18 11:39:24,989 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-18 11:39:24,989 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-03-18 11:39:24,989 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-03-18 11:39:24,989 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-18 11:39:24,989 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-18 11:39:25,167 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-18 11:39:25,181 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-18 11:39:25,182 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-18 11:39:25,183 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-18 11:39:25,183 INFO L275 PluginConnector]: CDTParser initialized [2022-03-18 11:39:25,184 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/n.c24.i [2022-03-18 11:39:25,233 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/45826f887/a64625e93d434df1b7e8437dd65310ef/FLAGd9944b699 [2022-03-18 11:39:25,584 INFO L306 CDTParser]: Found 1 translation units. [2022-03-18 11:39:25,585 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/n.c24.i [2022-03-18 11:39:25,590 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/45826f887/a64625e93d434df1b7e8437dd65310ef/FLAGd9944b699 [2022-03-18 11:39:25,604 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/45826f887/a64625e93d434df1b7e8437dd65310ef [2022-03-18 11:39:25,606 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-18 11:39:25,606 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-18 11:39:25,609 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-18 11:39:25,609 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-18 11:39:25,611 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-18 11:39:25,612 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 11:39:25" (1/1) ... [2022-03-18 11:39:25,612 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6c0cb1d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 11:39:25, skipping insertion in model container [2022-03-18 11:39:25,612 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 11:39:25" (1/1) ... [2022-03-18 11:39:25,617 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-18 11:39:25,635 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-18 11:39:25,752 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] [2022-03-18 11:39:25,779 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 11:39:25,785 INFO L203 MainTranslator]: Completed pre-run [2022-03-18 11:39:25,800 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] [2022-03-18 11:39:25,817 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 11:39:25,829 INFO L208 MainTranslator]: Completed translation [2022-03-18 11:39:25,830 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 11:39:25 WrapperNode [2022-03-18 11:39:25,830 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-18 11:39:25,831 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-18 11:39:25,831 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-18 11:39:25,831 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-18 11:39:25,837 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 11:39:25" (1/1) ... [2022-03-18 11:39:25,838 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 11:39:25" (1/1) ... [2022-03-18 11:39:25,844 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 11:39:25" (1/1) ... [2022-03-18 11:39:25,844 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 11:39:25" (1/1) ... [2022-03-18 11:39:25,851 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 11:39:25" (1/1) ... [2022-03-18 11:39:25,857 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 11:39:25" (1/1) ... [2022-03-18 11:39:25,862 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 11:39:25" (1/1) ... [2022-03-18 11:39:25,865 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-18 11:39:25,866 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-18 11:39:25,866 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-18 11:39:25,866 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-18 11:39:25,867 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 11:39:25" (1/1) ... [2022-03-18 11:39:25,875 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 11:39:25,882 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 11:39:25,891 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) [2022-03-18 11:39:25,893 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 [2022-03-18 11:39:25,921 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-18 11:39:25,921 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-18 11:39:25,921 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-18 11:39:25,921 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-18 11:39:25,922 INFO L138 BoogieDeclarations]: Found implementation of procedure bar [2022-03-18 11:39:25,922 INFO L138 BoogieDeclarations]: Found implementation of procedure foo [2022-03-18 11:39:25,922 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-18 11:39:25,922 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memmove [2022-03-18 11:39:25,922 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-18 11:39:25,922 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-18 11:39:25,922 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-03-18 11:39:25,922 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-03-18 11:39:25,922 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-18 11:39:25,923 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-18 11:39:25,923 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-18 11:39:25,923 INFO L130 BoogieDeclarations]: Found specification of procedure memcpy [2022-03-18 11:39:25,923 INFO L130 BoogieDeclarations]: Found specification of procedure memmove [2022-03-18 11:39:25,923 INFO L130 BoogieDeclarations]: Found specification of procedure memccpy [2022-03-18 11:39:25,923 INFO L130 BoogieDeclarations]: Found specification of procedure memset [2022-03-18 11:39:25,923 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2022-03-18 11:39:25,923 INFO L130 BoogieDeclarations]: Found specification of procedure memchr [2022-03-18 11:39:25,923 INFO L130 BoogieDeclarations]: Found specification of procedure strcpy [2022-03-18 11:39:25,923 INFO L130 BoogieDeclarations]: Found specification of procedure strncpy [2022-03-18 11:39:25,923 INFO L130 BoogieDeclarations]: Found specification of procedure strcat [2022-03-18 11:39:25,924 INFO L130 BoogieDeclarations]: Found specification of procedure strncat [2022-03-18 11:39:25,924 INFO L130 BoogieDeclarations]: Found specification of procedure strcmp [2022-03-18 11:39:25,924 INFO L130 BoogieDeclarations]: Found specification of procedure strncmp [2022-03-18 11:39:25,924 INFO L130 BoogieDeclarations]: Found specification of procedure strcoll [2022-03-18 11:39:25,924 INFO L130 BoogieDeclarations]: Found specification of procedure strxfrm [2022-03-18 11:39:25,924 INFO L130 BoogieDeclarations]: Found specification of procedure strcoll_l [2022-03-18 11:39:25,924 INFO L130 BoogieDeclarations]: Found specification of procedure strxfrm_l [2022-03-18 11:39:25,924 INFO L130 BoogieDeclarations]: Found specification of procedure strdup [2022-03-18 11:39:25,924 INFO L130 BoogieDeclarations]: Found specification of procedure strndup [2022-03-18 11:39:25,924 INFO L130 BoogieDeclarations]: Found specification of procedure strchr [2022-03-18 11:39:25,924 INFO L130 BoogieDeclarations]: Found specification of procedure strrchr [2022-03-18 11:39:25,924 INFO L130 BoogieDeclarations]: Found specification of procedure strcspn [2022-03-18 11:39:25,925 INFO L130 BoogieDeclarations]: Found specification of procedure strspn [2022-03-18 11:39:25,925 INFO L130 BoogieDeclarations]: Found specification of procedure strpbrk [2022-03-18 11:39:25,939 INFO L130 BoogieDeclarations]: Found specification of procedure strstr [2022-03-18 11:39:25,939 INFO L130 BoogieDeclarations]: Found specification of procedure strtok [2022-03-18 11:39:25,939 INFO L130 BoogieDeclarations]: Found specification of procedure __strtok_r [2022-03-18 11:39:25,939 INFO L130 BoogieDeclarations]: Found specification of procedure strtok_r [2022-03-18 11:39:25,939 INFO L130 BoogieDeclarations]: Found specification of procedure strlen [2022-03-18 11:39:25,939 INFO L130 BoogieDeclarations]: Found specification of procedure strnlen [2022-03-18 11:39:25,940 INFO L130 BoogieDeclarations]: Found specification of procedure strerror [2022-03-18 11:39:25,940 INFO L130 BoogieDeclarations]: Found specification of procedure strerror_r [2022-03-18 11:39:25,940 INFO L130 BoogieDeclarations]: Found specification of procedure strerror_l [2022-03-18 11:39:25,940 INFO L130 BoogieDeclarations]: Found specification of procedure __bzero [2022-03-18 11:39:25,940 INFO L130 BoogieDeclarations]: Found specification of procedure bcopy [2022-03-18 11:39:25,940 INFO L130 BoogieDeclarations]: Found specification of procedure bzero [2022-03-18 11:39:25,940 INFO L130 BoogieDeclarations]: Found specification of procedure bcmp [2022-03-18 11:39:25,940 INFO L130 BoogieDeclarations]: Found specification of procedure index [2022-03-18 11:39:25,940 INFO L130 BoogieDeclarations]: Found specification of procedure rindex [2022-03-18 11:39:25,940 INFO L130 BoogieDeclarations]: Found specification of procedure ffs [2022-03-18 11:39:25,940 INFO L130 BoogieDeclarations]: Found specification of procedure strcasecmp [2022-03-18 11:39:25,940 INFO L130 BoogieDeclarations]: Found specification of procedure strncasecmp [2022-03-18 11:39:25,941 INFO L130 BoogieDeclarations]: Found specification of procedure strsep [2022-03-18 11:39:25,941 INFO L130 BoogieDeclarations]: Found specification of procedure strsignal [2022-03-18 11:39:25,941 INFO L130 BoogieDeclarations]: Found specification of procedure __stpcpy [2022-03-18 11:39:25,941 INFO L130 BoogieDeclarations]: Found specification of procedure stpcpy [2022-03-18 11:39:25,941 INFO L130 BoogieDeclarations]: Found specification of procedure __stpncpy [2022-03-18 11:39:25,941 INFO L130 BoogieDeclarations]: Found specification of procedure stpncpy [2022-03-18 11:39:25,941 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-18 11:39:25,941 INFO L130 BoogieDeclarations]: Found specification of procedure bar [2022-03-18 11:39:25,941 INFO L130 BoogieDeclarations]: Found specification of procedure foo [2022-03-18 11:39:25,941 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-18 11:39:25,941 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-18 11:39:25,941 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-18 11:39:25,943 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-03-18 11:39:25,943 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memmove [2022-03-18 11:39:25,943 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-18 11:39:25,943 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-18 11:39:25,943 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-18 11:39:25,943 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-18 11:39:25,943 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2022-03-18 11:39:25,943 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2022-03-18 11:39:26,043 INFO L234 CfgBuilder]: Building ICFG [2022-03-18 11:39:26,044 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-18 11:39:26,192 INFO L275 CfgBuilder]: Performing block encoding [2022-03-18 11:39:26,208 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-18 11:39:26,208 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2022-03-18 11:39:26,210 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 11:39:26 BoogieIcfgContainer [2022-03-18 11:39:26,210 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-18 11:39:26,212 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-18 11:39:26,212 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-18 11:39:26,216 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-18 11:39:26,216 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.03 11:39:25" (1/3) ... [2022-03-18 11:39:26,217 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c780c87 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 11:39:26, skipping insertion in model container [2022-03-18 11:39:26,217 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 11:39:25" (2/3) ... [2022-03-18 11:39:26,217 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c780c87 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 11:39:26, skipping insertion in model container [2022-03-18 11:39:26,217 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 11:39:26" (3/3) ... [2022-03-18 11:39:26,218 INFO L111 eAbstractionObserver]: Analyzing ICFG n.c24.i [2022-03-18 11:39:26,221 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-18 11:39:26,221 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-18 11:39:26,255 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-18 11:39:26,259 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-18 11:39:26,259 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-18 11:39:26,270 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) [2022-03-18 11:39:26,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-03-18 11:39:26,273 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 11:39:26,273 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 11:39:26,274 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 11:39:26,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 11:39:26,277 INFO L85 PathProgramCache]: Analyzing trace with hash -29354929, now seen corresponding path program 1 times [2022-03-18 11:39:26,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 11:39:26,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600853176] [2022-03-18 11:39:26,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 11:39:26,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 11:39:26,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 11:39:26,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 11:39:26,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 11:39:26,411 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 11:39:26,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 11:39:26,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600853176] [2022-03-18 11:39:26,412 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600853176] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 11:39:26,412 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 11:39:26,412 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-18 11:39:26,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860075460] [2022-03-18 11:39:26,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 11:39:26,420 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-18 11:39:26,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 11:39:26,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-18 11:39:26,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-18 11:39:26,443 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) [2022-03-18 11:39:26,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 11:39:26,518 INFO L93 Difference]: Finished difference Result 98 states and 133 transitions. [2022-03-18 11:39:26,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-18 11:39:26,520 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 [2022-03-18 11:39:26,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 11:39:26,527 INFO L225 Difference]: With dead ends: 98 [2022-03-18 11:39:26,529 INFO L226 Difference]: Without dead ends: 46 [2022-03-18 11:39:26,531 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-18 11:39:26,539 INFO L912 BasicCegarLoop]: 62 mSDtfsCounter, 51 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 11:39:26,540 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 65 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 11:39:26,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-03-18 11:39:26,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2022-03-18 11:39:26,571 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) [2022-03-18 11:39:26,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 56 transitions. [2022-03-18 11:39:26,573 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 56 transitions. Word has length 13 [2022-03-18 11:39:26,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 11:39:26,573 INFO L478 AbstractCegarLoop]: Abstraction has 46 states and 56 transitions. [2022-03-18 11:39:26,573 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) [2022-03-18 11:39:26,573 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 56 transitions. [2022-03-18 11:39:26,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-03-18 11:39:26,574 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 11:39:26,574 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 11:39:26,574 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-18 11:39:26,575 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 11:39:26,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 11:39:26,578 INFO L85 PathProgramCache]: Analyzing trace with hash -1128673794, now seen corresponding path program 1 times [2022-03-18 11:39:26,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 11:39:26,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326101234] [2022-03-18 11:39:26,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 11:39:26,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 11:39:26,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 11:39:26,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 11:39:26,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 11:39:26,640 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 11:39:26,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 11:39:26,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326101234] [2022-03-18 11:39:26,641 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326101234] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 11:39:26,641 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 11:39:26,641 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 11:39:26,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477970217] [2022-03-18 11:39:26,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 11:39:26,642 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-18 11:39:26,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 11:39:26,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-18 11:39:26,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 11:39:26,644 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) [2022-03-18 11:39:26,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 11:39:26,770 INFO L93 Difference]: Finished difference Result 107 states and 138 transitions. [2022-03-18 11:39:26,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-18 11:39:26,770 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 [2022-03-18 11:39:26,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 11:39:26,773 INFO L225 Difference]: With dead ends: 107 [2022-03-18 11:39:26,773 INFO L226 Difference]: Without dead ends: 69 [2022-03-18 11:39:26,777 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-18 11:39:26,778 INFO L912 BasicCegarLoop]: 46 mSDtfsCounter, 94 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 11:39:26,778 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 53 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 11:39:26,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-03-18 11:39:26,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 48. [2022-03-18 11:39:26,794 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) [2022-03-18 11:39:26,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 58 transitions. [2022-03-18 11:39:26,800 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 58 transitions. Word has length 13 [2022-03-18 11:39:26,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 11:39:26,801 INFO L478 AbstractCegarLoop]: Abstraction has 48 states and 58 transitions. [2022-03-18 11:39:26,801 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) [2022-03-18 11:39:26,801 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 58 transitions. [2022-03-18 11:39:26,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-18 11:39:26,801 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 11:39:26,802 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 11:39:26,802 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-18 11:39:26,802 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 11:39:26,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 11:39:26,802 INFO L85 PathProgramCache]: Analyzing trace with hash 556660632, now seen corresponding path program 1 times [2022-03-18 11:39:26,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 11:39:26,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013795091] [2022-03-18 11:39:26,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 11:39:26,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 11:39:26,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 11:39:26,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 11:39:26,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 11:39:26,878 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 11:39:26,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 11:39:26,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013795091] [2022-03-18 11:39:26,879 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013795091] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 11:39:26,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064446960] [2022-03-18 11:39:26,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 11:39:26,881 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 11:39:26,881 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 11:39:26,882 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) [2022-03-18 11:39:26,923 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-18 11:39:26,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 11:39:26,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 3 conjunts are in the unsatisfiable core [2022-03-18 11:39:26,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 11:39:27,060 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 11:39:27,061 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 11:39:27,101 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 11:39:27,102 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2064446960] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 11:39:27,102 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 11:39:27,102 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-03-18 11:39:27,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882418833] [2022-03-18 11:39:27,102 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 11:39:27,102 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-18 11:39:27,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 11:39:27,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-18 11:39:27,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-03-18 11:39:27,103 INFO L87 Difference]: Start difference. First operand 48 states and 58 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 11:39:27,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 11:39:27,335 INFO L93 Difference]: Finished difference Result 156 states and 211 transitions. [2022-03-18 11:39:27,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-18 11:39:27,336 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2022-03-18 11:39:27,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 11:39:27,336 INFO L225 Difference]: With dead ends: 156 [2022-03-18 11:39:27,337 INFO L226 Difference]: Without dead ends: 117 [2022-03-18 11:39:27,337 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2022-03-18 11:39:27,338 INFO L912 BasicCegarLoop]: 46 mSDtfsCounter, 263 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 11:39:27,338 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [263 Valid, 53 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 11:39:27,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2022-03-18 11:39:27,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2022-03-18 11:39:27,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 97 states have (on average 1.3298969072164948) internal successors, (129), 97 states have internal predecessors, (129), 15 states have call successors, (15), 6 states have call predecessors, (15), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-03-18 11:39:27,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 157 transitions. [2022-03-18 11:39:27,348 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 157 transitions. Word has length 20 [2022-03-18 11:39:27,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 11:39:27,349 INFO L478 AbstractCegarLoop]: Abstraction has 117 states and 157 transitions. [2022-03-18 11:39:27,349 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 11:39:27,349 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 157 transitions. [2022-03-18 11:39:27,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-03-18 11:39:27,350 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 11:39:27,350 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 11:39:27,368 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-03-18 11:39:27,568 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 [2022-03-18 11:39:27,568 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 11:39:27,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 11:39:27,569 INFO L85 PathProgramCache]: Analyzing trace with hash -542078090, now seen corresponding path program 2 times [2022-03-18 11:39:27,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 11:39:27,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736619197] [2022-03-18 11:39:27,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 11:39:27,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 11:39:27,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 11:39:27,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 11:39:27,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 11:39:27,667 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-03-18 11:39:27,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 11:39:27,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736619197] [2022-03-18 11:39:27,668 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736619197] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 11:39:27,668 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 11:39:27,668 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-18 11:39:27,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009590805] [2022-03-18 11:39:27,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 11:39:27,668 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-18 11:39:27,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 11:39:27,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-18 11:39:27,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-18 11:39:27,669 INFO L87 Difference]: Start difference. First operand 117 states and 157 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 11:39:27,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 11:39:27,824 INFO L93 Difference]: Finished difference Result 204 states and 284 transitions. [2022-03-18 11:39:27,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-18 11:39:27,825 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 41 [2022-03-18 11:39:27,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 11:39:27,828 INFO L225 Difference]: With dead ends: 204 [2022-03-18 11:39:27,828 INFO L226 Difference]: Without dead ends: 199 [2022-03-18 11:39:27,830 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-03-18 11:39:27,835 INFO L912 BasicCegarLoop]: 52 mSDtfsCounter, 89 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 11:39:27,835 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 69 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 175 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 11:39:27,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2022-03-18 11:39:27,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 118. [2022-03-18 11:39:27,849 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) [2022-03-18 11:39:27,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 159 transitions. [2022-03-18 11:39:27,850 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 159 transitions. Word has length 41 [2022-03-18 11:39:27,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 11:39:27,850 INFO L478 AbstractCegarLoop]: Abstraction has 118 states and 159 transitions. [2022-03-18 11:39:27,850 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) [2022-03-18 11:39:27,851 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 159 transitions. [2022-03-18 11:39:27,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-03-18 11:39:27,858 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 11:39:27,858 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 11:39:27,858 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-03-18 11:39:27,858 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 11:39:27,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 11:39:27,858 INFO L85 PathProgramCache]: Analyzing trace with hash 399846123, now seen corresponding path program 1 times [2022-03-18 11:39:27,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 11:39:27,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347559374] [2022-03-18 11:39:27,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 11:39:27,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 11:39:27,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 11:39:27,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 11:39:27,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 11:39:27,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-03-18 11:39:27,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 11:39:27,965 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-03-18 11:39:27,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 11:39:27,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347559374] [2022-03-18 11:39:27,965 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347559374] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 11:39:27,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662300112] [2022-03-18 11:39:27,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 11:39:27,965 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 11:39:27,965 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 11:39:27,966 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) [2022-03-18 11:39:27,967 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-18 11:39:28,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 11:39:28,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-18 11:39:28,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 11:39:28,106 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-03-18 11:39:28,106 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 11:39:28,217 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-03-18 11:39:28,217 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [662300112] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 11:39:28,218 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 11:39:28,218 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 15 [2022-03-18 11:39:28,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15330911] [2022-03-18 11:39:28,218 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 11:39:28,218 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-18 11:39:28,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 11:39:28,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-18 11:39:28,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2022-03-18 11:39:28,219 INFO L87 Difference]: Start difference. First operand 118 states and 159 transitions. Second operand has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 13 states have internal predecessors, (46), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 11:39:28,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 11:39:28,717 INFO L93 Difference]: Finished difference Result 383 states and 553 transitions. [2022-03-18 11:39:28,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-18 11:39:28,718 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 13 states have internal predecessors, (46), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 50 [2022-03-18 11:39:28,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 11:39:28,721 INFO L225 Difference]: With dead ends: 383 [2022-03-18 11:39:28,721 INFO L226 Difference]: Without dead ends: 280 [2022-03-18 11:39:28,722 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=243, Invalid=459, Unknown=0, NotChecked=0, Total=702 [2022-03-18 11:39:28,722 INFO L912 BasicCegarLoop]: 43 mSDtfsCounter, 568 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 554 mSolverCounterSat, 224 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 568 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 778 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 224 IncrementalHoareTripleChecker+Valid, 554 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-18 11:39:28,723 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [568 Valid, 49 Invalid, 778 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [224 Valid, 554 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-18 11:39:28,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2022-03-18 11:39:28,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 256. [2022-03-18 11:39:28,750 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) [2022-03-18 11:39:28,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 357 transitions. [2022-03-18 11:39:28,753 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 357 transitions. Word has length 50 [2022-03-18 11:39:28,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 11:39:28,754 INFO L478 AbstractCegarLoop]: Abstraction has 256 states and 357 transitions. [2022-03-18 11:39:28,754 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 13 states have internal predecessors, (46), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 11:39:28,754 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 357 transitions. [2022-03-18 11:39:28,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-03-18 11:39:28,756 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 11:39:28,756 INFO L500 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 11:39:28,775 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-18 11:39:28,970 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 [2022-03-18 11:39:28,971 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 11:39:28,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 11:39:28,971 INFO L85 PathProgramCache]: Analyzing trace with hash 1219178295, now seen corresponding path program 2 times [2022-03-18 11:39:28,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 11:39:28,971 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126773136] [2022-03-18 11:39:28,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 11:39:28,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 11:39:29,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 11:39:29,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 11:39:29,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 11:39:29,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2022-03-18 11:39:29,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 11:39:29,182 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2022-03-18 11:39:29,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 11:39:29,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126773136] [2022-03-18 11:39:29,182 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126773136] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 11:39:29,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367813766] [2022-03-18 11:39:29,182 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 11:39:29,182 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 11:39:29,182 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 11:39:29,183 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) [2022-03-18 11:39:29,220 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-18 11:39:29,300 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 11:39:29,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 11:39:29,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-18 11:39:29,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 11:39:29,420 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2022-03-18 11:39:29,420 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 11:39:29,680 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2022-03-18 11:39:29,680 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1367813766] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 11:39:29,680 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 11:39:29,680 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 13] total 27 [2022-03-18 11:39:29,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063618129] [2022-03-18 11:39:29,680 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 11:39:29,681 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-18 11:39:29,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 11:39:29,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-18 11:39:29,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=304, Invalid=398, Unknown=0, NotChecked=0, Total=702 [2022-03-18 11:39:29,682 INFO L87 Difference]: Start difference. First operand 256 states and 357 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 25 states have internal predecessors, (70), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 11:39:30,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 11:39:30,827 INFO L93 Difference]: Finished difference Result 803 states and 1183 transitions. [2022-03-18 11:39:30,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-18 11:39:30,828 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 25 states have internal predecessors, (70), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 92 [2022-03-18 11:39:30,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 11:39:30,831 INFO L225 Difference]: With dead ends: 803 [2022-03-18 11:39:30,831 INFO L226 Difference]: Without dead ends: 574 [2022-03-18 11:39:30,832 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 411 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=909, Invalid=1641, Unknown=0, NotChecked=0, Total=2550 [2022-03-18 11:39:30,832 INFO L912 BasicCegarLoop]: 43 mSDtfsCounter, 1354 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 1140 mSolverCounterSat, 625 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1354 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 1765 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 625 IncrementalHoareTripleChecker+Valid, 1140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-18 11:39:30,833 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [1354 Valid, 49 Invalid, 1765 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [625 Valid, 1140 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-18 11:39:30,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 574 states. [2022-03-18 11:39:30,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 574 to 532. [2022-03-18 11:39:30,859 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) [2022-03-18 11:39:30,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 532 states to 532 states and 753 transitions. [2022-03-18 11:39:30,861 INFO L78 Accepts]: Start accepts. Automaton has 532 states and 753 transitions. Word has length 92 [2022-03-18 11:39:30,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 11:39:30,861 INFO L478 AbstractCegarLoop]: Abstraction has 532 states and 753 transitions. [2022-03-18 11:39:30,861 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 25 states have internal predecessors, (70), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 11:39:30,861 INFO L276 IsEmpty]: Start isEmpty. Operand 532 states and 753 transitions. [2022-03-18 11:39:30,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2022-03-18 11:39:30,863 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 11:39:30,863 INFO L500 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 11:39:30,880 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-18 11:39:31,079 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 [2022-03-18 11:39:31,079 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 11:39:31,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 11:39:31,080 INFO L85 PathProgramCache]: Analyzing trace with hash 1540862927, now seen corresponding path program 3 times [2022-03-18 11:39:31,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 11:39:31,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334320454] [2022-03-18 11:39:31,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 11:39:31,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 11:39:31,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 11:39:31,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 11:39:31,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 11:39:31,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 161 [2022-03-18 11:39:31,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 11:39:31,422 INFO L134 CoverageAnalysis]: Checked inductivity of 1683 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 1199 trivial. 0 not checked. [2022-03-18 11:39:31,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 11:39:31,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334320454] [2022-03-18 11:39:31,423 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334320454] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 11:39:31,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [449905476] [2022-03-18 11:39:31,423 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-18 11:39:31,423 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 11:39:31,423 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 11:39:31,424 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) [2022-03-18 11:39:31,451 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-18 11:39:31,522 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-18 11:39:31,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 11:39:31,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-18 11:39:31,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 11:39:31,784 INFO L134 CoverageAnalysis]: Checked inductivity of 1683 backedges. 85 proven. 1 refuted. 0 times theorem prover too weak. 1597 trivial. 0 not checked. [2022-03-18 11:39:31,784 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 11:39:32,036 INFO L134 CoverageAnalysis]: Checked inductivity of 1683 backedges. 85 proven. 1 refuted. 0 times theorem prover too weak. 1597 trivial. 0 not checked. [2022-03-18 11:39:32,036 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [449905476] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 11:39:32,036 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 11:39:32,037 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 7, 7] total 35 [2022-03-18 11:39:32,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327320536] [2022-03-18 11:39:32,037 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 11:39:32,037 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-18 11:39:32,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 11:39:32,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-18 11:39:32,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=861, Unknown=0, NotChecked=0, Total=1190 [2022-03-18 11:39:32,038 INFO L87 Difference]: Start difference. First operand 532 states and 753 transitions. Second operand has 35 states, 35 states have (on average 2.7714285714285714) internal successors, (97), 32 states have internal predecessors, (97), 6 states have call successors, (9), 5 states have call predecessors, (9), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-18 11:39:39,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 11:39:39,142 INFO L93 Difference]: Finished difference Result 2639 states and 3948 transitions. [2022-03-18 11:39:39,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 174 states. [2022-03-18 11:39:39,142 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.7714285714285714) internal successors, (97), 32 states have internal predecessors, (97), 6 states have call successors, (9), 5 states have call predecessors, (9), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 176 [2022-03-18 11:39:39,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 11:39:39,151 INFO L225 Difference]: With dead ends: 2639 [2022-03-18 11:39:39,151 INFO L226 Difference]: Without dead ends: 2153 [2022-03-18 11:39:39,161 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 647 GetRequests, 443 SyntacticMatches, 1 SemanticMatches, 203 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16044 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=10951, Invalid=30869, Unknown=0, NotChecked=0, Total=41820 [2022-03-18 11:39:39,162 INFO L912 BasicCegarLoop]: 41 mSDtfsCounter, 4721 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 4418 mSolverCounterSat, 2670 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4721 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 7088 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2670 IncrementalHoareTripleChecker+Valid, 4418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-03-18 11:39:39,162 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [4721 Valid, 61 Invalid, 7088 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2670 Valid, 4418 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-03-18 11:39:39,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2153 states. [2022-03-18 11:39:39,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2153 to 606. [2022-03-18 11:39:39,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 606 states, 520 states have (on average 1.3596153846153847) internal successors, (707), 520 states have internal predecessors, (707), 81 states have call successors, (81), 6 states have call predecessors, (81), 4 states have return successors, (79), 79 states have call predecessors, (79), 79 states have call successors, (79) [2022-03-18 11:39:39,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 606 states to 606 states and 867 transitions. [2022-03-18 11:39:39,220 INFO L78 Accepts]: Start accepts. Automaton has 606 states and 867 transitions. Word has length 176 [2022-03-18 11:39:39,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 11:39:39,221 INFO L478 AbstractCegarLoop]: Abstraction has 606 states and 867 transitions. [2022-03-18 11:39:39,221 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.7714285714285714) internal successors, (97), 32 states have internal predecessors, (97), 6 states have call successors, (9), 5 states have call predecessors, (9), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-18 11:39:39,221 INFO L276 IsEmpty]: Start isEmpty. Operand 606 states and 867 transitions. [2022-03-18 11:39:39,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2022-03-18 11:39:39,226 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 11:39:39,226 INFO L500 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 23, 23, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 11:39:39,243 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-18 11:39:39,442 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 [2022-03-18 11:39:39,443 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 11:39:39,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 11:39:39,443 INFO L85 PathProgramCache]: Analyzing trace with hash 1852344772, now seen corresponding path program 4 times [2022-03-18 11:39:39,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 11:39:39,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758767431] [2022-03-18 11:39:39,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 11:39:39,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 11:39:39,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 11:39:39,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 11:39:39,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 11:39:39,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 168 [2022-03-18 11:39:39,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 11:39:39,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 177 [2022-03-18 11:39:39,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 11:39:39,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 186 [2022-03-18 11:39:39,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 11:39:39,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 195 [2022-03-18 11:39:39,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 11:39:39,811 INFO L134 CoverageAnalysis]: Checked inductivity of 1963 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 1434 trivial. 0 not checked. [2022-03-18 11:39:39,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 11:39:39,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758767431] [2022-03-18 11:39:39,811 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758767431] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 11:39:39,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284212732] [2022-03-18 11:39:39,812 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 11:39:39,812 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 11:39:39,812 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 11:39:39,813 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) [2022-03-18 11:39:39,814 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-18 11:39:39,971 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 11:39:39,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 11:39:39,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 804 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-18 11:39:39,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 11:39:40,197 INFO L134 CoverageAnalysis]: Checked inductivity of 1963 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 1434 trivial. 0 not checked. [2022-03-18 11:39:40,197 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 11:39:40,970 INFO L134 CoverageAnalysis]: Checked inductivity of 1963 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 1434 trivial. 0 not checked. [2022-03-18 11:39:40,970 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [284212732] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 11:39:40,970 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 11:39:40,970 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 26, 26] total 53 [2022-03-18 11:39:40,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678665296] [2022-03-18 11:39:40,970 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 11:39:40,971 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-03-18 11:39:40,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 11:39:40,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-03-18 11:39:40,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1279, Invalid=1477, Unknown=0, NotChecked=0, Total=2756 [2022-03-18 11:39:40,972 INFO L87 Difference]: Start difference. First operand 606 states and 867 transitions. Second operand has 53 states, 53 states have (on average 2.30188679245283) internal successors, (122), 51 states have internal predecessors, (122), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 11:39:44,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 11:39:44,042 INFO L93 Difference]: Finished difference Result 3090 states and 4813 transitions. [2022-03-18 11:39:44,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-03-18 11:39:44,042 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.30188679245283) internal successors, (122), 51 states have internal predecessors, (122), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 210 [2022-03-18 11:39:44,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 11:39:44,051 INFO L225 Difference]: With dead ends: 3090 [2022-03-18 11:39:44,051 INFO L226 Difference]: Without dead ends: 2537 [2022-03-18 11:39:44,054 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 506 GetRequests, 405 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1685 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=3834, Invalid=6672, Unknown=0, NotChecked=0, Total=10506 [2022-03-18 11:39:44,054 INFO L912 BasicCegarLoop]: 43 mSDtfsCounter, 2869 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2550 mSolverCounterSat, 1299 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2869 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 3849 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1299 IncrementalHoareTripleChecker+Valid, 2550 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-03-18 11:39:44,054 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2869 Valid, 51 Invalid, 3849 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1299 Valid, 2550 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-03-18 11:39:44,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2537 states. [2022-03-18 11:39:44,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2537 to 1181. [2022-03-18 11:39:44,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1181 states, 1020 states have (on average 1.3549019607843138) internal successors, (1382), 1020 states have internal predecessors, (1382), 156 states have call successors, (156), 6 states have call predecessors, (156), 4 states have return successors, (154), 154 states have call predecessors, (154), 154 states have call successors, (154) [2022-03-18 11:39:44,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1181 states to 1181 states and 1692 transitions. [2022-03-18 11:39:44,149 INFO L78 Accepts]: Start accepts. Automaton has 1181 states and 1692 transitions. Word has length 210 [2022-03-18 11:39:44,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 11:39:44,149 INFO L478 AbstractCegarLoop]: Abstraction has 1181 states and 1692 transitions. [2022-03-18 11:39:44,149 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.30188679245283) internal successors, (122), 51 states have internal predecessors, (122), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 11:39:44,149 INFO L276 IsEmpty]: Start isEmpty. Operand 1181 states and 1692 transitions. [2022-03-18 11:39:44,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 386 [2022-03-18 11:39:44,154 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 11:39:44,154 INFO L500 BasicCegarLoop]: trace histogram [48, 48, 48, 48, 48, 48, 48, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 11:39:44,171 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-18 11:39:44,372 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 [2022-03-18 11:39:44,372 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 11:39:44,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 11:39:44,372 INFO L85 PathProgramCache]: Analyzing trace with hash 1393924830, now seen corresponding path program 5 times [2022-03-18 11:39:44,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 11:39:44,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873367417] [2022-03-18 11:39:44,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 11:39:44,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 11:39:44,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 11:39:45,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 11:39:45,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 11:39:45,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 343 [2022-03-18 11:39:45,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 11:39:45,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 352 [2022-03-18 11:39:45,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 11:39:45,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 361 [2022-03-18 11:39:45,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 11:39:45,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 370 [2022-03-18 11:39:45,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 11:39:45,360 INFO L134 CoverageAnalysis]: Checked inductivity of 8238 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 5934 trivial. 0 not checked. [2022-03-18 11:39:45,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 11:39:45,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873367417] [2022-03-18 11:39:45,361 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873367417] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 11:39:45,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1348136980] [2022-03-18 11:39:45,361 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-18 11:39:45,361 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 11:39:45,361 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 11:39:45,362 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) [2022-03-18 11:39:45,363 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-18 11:40:35,057 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 49 check-sat command(s) [2022-03-18 11:40:35,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 11:40:35,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 1454 conjuncts, 50 conjunts are in the unsatisfiable core [2022-03-18 11:40:35,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 11:40:35,532 INFO L134 CoverageAnalysis]: Checked inductivity of 8238 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 5934 trivial. 0 not checked. [2022-03-18 11:40:35,532 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 11:40:37,902 INFO L134 CoverageAnalysis]: Checked inductivity of 8238 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 5934 trivial. 0 not checked. [2022-03-18 11:40:37,903 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1348136980] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 11:40:37,903 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 11:40:37,903 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 51, 51] total 103 [2022-03-18 11:40:37,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244098824] [2022-03-18 11:40:37,903 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 11:40:37,904 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 103 states [2022-03-18 11:40:37,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 11:40:37,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2022-03-18 11:40:37,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5054, Invalid=5452, Unknown=0, NotChecked=0, Total=10506 [2022-03-18 11:40:37,906 INFO L87 Difference]: Start difference. First operand 1181 states and 1692 transitions. Second operand has 103 states, 103 states have (on average 2.1553398058252426) internal successors, (222), 101 states have internal predecessors, (222), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 11:40:49,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 11:40:49,709 INFO L93 Difference]: Finished difference Result 6115 states and 9538 transitions. [2022-03-18 11:40:49,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2022-03-18 11:40:49,710 INFO L78 Accepts]: Start accepts. Automaton has has 103 states, 103 states have (on average 2.1553398058252426) internal successors, (222), 101 states have internal predecessors, (222), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 385 [2022-03-18 11:40:49,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 11:40:49,727 INFO L225 Difference]: With dead ends: 6115 [2022-03-18 11:40:49,727 INFO L226 Difference]: Without dead ends: 5037 [2022-03-18 11:40:49,732 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 931 GetRequests, 730 SyntacticMatches, 0 SemanticMatches, 201 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6510 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=15159, Invalid=25847, Unknown=0, NotChecked=0, Total=41006 [2022-03-18 11:40:49,732 INFO L912 BasicCegarLoop]: 43 mSDtfsCounter, 5759 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 5576 mSolverCounterSat, 2789 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5759 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 8365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2789 IncrementalHoareTripleChecker+Valid, 5576 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-03-18 11:40:49,732 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [5759 Valid, 51 Invalid, 8365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2789 Valid, 5576 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-03-18 11:40:49,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5037 states. [2022-03-18 11:40:49,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5037 to 2331. [2022-03-18 11:40:49,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2331 states, 2020 states have (on average 1.3524752475247526) internal successors, (2732), 2020 states have internal predecessors, (2732), 306 states have call successors, (306), 6 states have call predecessors, (306), 4 states have return successors, (304), 304 states have call predecessors, (304), 304 states have call successors, (304) [2022-03-18 11:40:49,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2331 states to 2331 states and 3342 transitions. [2022-03-18 11:40:49,898 INFO L78 Accepts]: Start accepts. Automaton has 2331 states and 3342 transitions. Word has length 385 [2022-03-18 11:40:49,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 11:40:49,898 INFO L478 AbstractCegarLoop]: Abstraction has 2331 states and 3342 transitions. [2022-03-18 11:40:49,898 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 103 states, 103 states have (on average 2.1553398058252426) internal successors, (222), 101 states have internal predecessors, (222), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 11:40:49,898 INFO L276 IsEmpty]: Start isEmpty. Operand 2331 states and 3342 transitions. [2022-03-18 11:40:49,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 736 [2022-03-18 11:40:49,911 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 11:40:49,911 INFO L500 BasicCegarLoop]: trace histogram [98, 98, 98, 98, 98, 98, 98, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 11:40:49,948 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-18 11:40:50,135 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 [2022-03-18 11:40:50,136 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 11:40:50,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 11:40:50,136 INFO L85 PathProgramCache]: Analyzing trace with hash -1307429062, now seen corresponding path program 6 times [2022-03-18 11:40:50,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 11:40:50,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416976705] [2022-03-18 11:40:50,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 11:40:50,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 11:40:50,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 11:40:53,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 11:40:53,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 11:40:53,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 693 [2022-03-18 11:40:53,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 11:40:53,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 702 [2022-03-18 11:40:53,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 11:40:53,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 711 [2022-03-18 11:40:53,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 11:40:53,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 720 [2022-03-18 11:40:53,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 11:40:53,251 INFO L134 CoverageAnalysis]: Checked inductivity of 33913 backedges. 0 proven. 9604 refuted. 0 times theorem prover too weak. 24309 trivial. 0 not checked. [2022-03-18 11:40:53,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 11:40:53,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416976705] [2022-03-18 11:40:53,252 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416976705] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 11:40:53,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852961999] [2022-03-18 11:40:53,252 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 11:40:53,252 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 11:40:53,252 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 11:40:53,253 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) [2022-03-18 11:40:53,254 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-18 11:40:53,534 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2022-03-18 11:40:53,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 11:40:53,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 466 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-18 11:40:53,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 11:40:54,566 INFO L134 CoverageAnalysis]: Checked inductivity of 33913 backedges. 680 proven. 40 refuted. 0 times theorem prover too weak. 33193 trivial. 0 not checked. [2022-03-18 11:40:54,566 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 11:40:55,796 INFO L134 CoverageAnalysis]: Checked inductivity of 33913 backedges. 680 proven. 40 refuted. 0 times theorem prover too weak. 33193 trivial. 0 not checked. [2022-03-18 11:40:55,797 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1852961999] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 11:40:55,797 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 11:40:55,797 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [103, 10, 10] total 117 [2022-03-18 11:40:55,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720902841] [2022-03-18 11:40:55,797 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 11:40:55,798 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 117 states [2022-03-18 11:40:55,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 11:40:55,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 117 interpolants. [2022-03-18 11:40:55,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5130, Invalid=8442, Unknown=0, NotChecked=0, Total=13572 [2022-03-18 11:40:55,800 INFO L87 Difference]: Start difference. First operand 2331 states and 3342 transitions. Second operand has 117 states, 117 states have (on average 2.3846153846153846) internal successors, (279), 114 states have internal predecessors, (279), 12 states have call successors, (15), 5 states have call predecessors, (15), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-18 11:47:53,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 11:47:53,844 INFO L93 Difference]: Finished difference Result 23041 states and 35166 transitions. [2022-03-18 11:47:53,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 1606 states. [2022-03-18 11:47:53,844 INFO L78 Accepts]: Start accepts. Automaton has has 117 states, 117 states have (on average 2.3846153846153846) internal successors, (279), 114 states have internal predecessors, (279), 12 states have call successors, (15), 5 states have call predecessors, (15), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Word has length 735 [2022-03-18 11:47:53,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 11:47:53,931 INFO L225 Difference]: With dead ends: 23041 [2022-03-18 11:47:53,932 INFO L226 Difference]: Without dead ends: 20905 [2022-03-18 11:47:54,176 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 3886 GetRequests, 2168 SyntacticMatches, 1 SemanticMatches, 1717 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1605796 ImplicationChecksByTransitivity, 110.3s TimeCoverageRelationStatistics Valid=715091, Invalid=2238151, Unknown=0, NotChecked=0, Total=2953242 [2022-03-18 11:47:54,176 INFO L912 BasicCegarLoop]: 41 mSDtfsCounter, 42635 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 37287 mSolverCounterSat, 35138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42635 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 72425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 35138 IncrementalHoareTripleChecker+Valid, 37287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 21.9s IncrementalHoareTripleChecker+Time [2022-03-18 11:47:54,176 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [42635 Valid, 69 Invalid, 72425 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [35138 Valid, 37287 Invalid, 0 Unknown, 0 Unchecked, 21.9s Time] [2022-03-18 11:47:54,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20905 states. [2022-03-18 11:47:54,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20905 to 2456. [2022-03-18 11:47:54,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2456 states, 2124 states have (on average 1.3582862523540489) internal successors, (2885), 2124 states have internal predecessors, (2885), 327 states have call successors, (327), 6 states have call predecessors, (327), 4 states have return successors, (325), 325 states have call predecessors, (325), 325 states have call successors, (325) [2022-03-18 11:47:54,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2456 states to 2456 states and 3537 transitions. [2022-03-18 11:47:54,584 INFO L78 Accepts]: Start accepts. Automaton has 2456 states and 3537 transitions. Word has length 735 [2022-03-18 11:47:54,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 11:47:54,584 INFO L478 AbstractCegarLoop]: Abstraction has 2456 states and 3537 transitions. [2022-03-18 11:47:54,585 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 117 states, 117 states have (on average 2.3846153846153846) internal successors, (279), 114 states have internal predecessors, (279), 12 states have call successors, (15), 5 states have call predecessors, (15), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-18 11:47:54,585 INFO L276 IsEmpty]: Start isEmpty. Operand 2456 states and 3537 transitions. [2022-03-18 11:47:54,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 797 [2022-03-18 11:47:54,601 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 11:47:54,601 INFO L500 BasicCegarLoop]: trace histogram [99, 99, 99, 99, 99, 99, 99, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 11:47:54,621 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-18 11:47:54,815 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 [2022-03-18 11:47:54,816 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 11:47:54,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 11:47:54,816 INFO L85 PathProgramCache]: Analyzing trace with hash 1612016700, now seen corresponding path program 7 times [2022-03-18 11:47:54,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 11:47:54,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873232126] [2022-03-18 11:47:54,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 11:47:54,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 11:47:54,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 11:47:57,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 11:47:57,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 11:47:57,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 700 [2022-03-18 11:47:57,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 11:47:57,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 709 [2022-03-18 11:47:57,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 11:47:57,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 718 [2022-03-18 11:47:57,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 11:47:57,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 727 [2022-03-18 11:47:57,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 11:47:57,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 736 [2022-03-18 11:47:57,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 11:47:57,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 745 [2022-03-18 11:47:57,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 11:47:57,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 754 [2022-03-18 11:47:57,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 11:47:57,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 763 [2022-03-18 11:47:57,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 11:47:57,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 772 [2022-03-18 11:47:57,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 11:47:57,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 781 [2022-03-18 11:47:57,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 11:47:57,894 INFO L134 CoverageAnalysis]: Checked inductivity of 35550 backedges. 0 proven. 9801 refuted. 0 times theorem prover too weak. 25749 trivial. 0 not checked. [2022-03-18 11:47:57,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 11:47:57,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873232126] [2022-03-18 11:47:57,894 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873232126] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 11:47:57,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055375924] [2022-03-18 11:47:57,895 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-18 11:47:57,895 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 11:47:57,895 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 11:47:57,896 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) [2022-03-18 11:47:57,897 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-18 11:47:58,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 11:47:58,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 2972 conjuncts, 101 conjunts are in the unsatisfiable core [2022-03-18 11:47:58,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 11:47:59,147 INFO L134 CoverageAnalysis]: Checked inductivity of 35550 backedges. 0 proven. 9801 refuted. 0 times theorem prover too weak. 25749 trivial. 0 not checked. [2022-03-18 11:47:59,148 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 11:48:07,849 INFO L134 CoverageAnalysis]: Checked inductivity of 35550 backedges. 0 proven. 9801 refuted. 0 times theorem prover too weak. 25749 trivial. 0 not checked. [2022-03-18 11:48:07,850 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2055375924] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 11:48:07,850 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 11:48:07,850 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [104, 102, 102] total 205 [2022-03-18 11:48:07,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804067846] [2022-03-18 11:48:07,850 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 11:48:07,851 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 205 states [2022-03-18 11:48:07,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 11:48:07,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 205 interpolants. [2022-03-18 11:48:07,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20507, Invalid=21313, Unknown=0, NotChecked=0, Total=41820 [2022-03-18 11:48:07,862 INFO L87 Difference]: Start difference. First operand 2456 states and 3537 transitions. Second operand has 205 states, 205 states have (on average 2.078048780487805) internal successors, (426), 203 states have internal predecessors, (426), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 11:49:40,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 11:49:40,974 INFO L93 Difference]: Finished difference Result 22792 states and 36475 transitions. [2022-03-18 11:49:40,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 206 states. [2022-03-18 11:49:40,975 INFO L78 Accepts]: Start accepts. Automaton has has 205 states, 205 states have (on average 2.078048780487805) internal successors, (426), 203 states have internal predecessors, (426), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 796 [2022-03-18 11:49:40,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 11:49:41,028 INFO L225 Difference]: With dead ends: 22792 [2022-03-18 11:49:41,028 INFO L226 Difference]: Without dead ends: 20541 [2022-03-18 11:49:41,046 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 1918 GetRequests, 1513 SyntacticMatches, 0 SemanticMatches, 405 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26043 ImplicationChecksByTransitivity, 21.2s TimeCoverageRelationStatistics Valid=61518, Invalid=103724, Unknown=0, NotChecked=0, Total=165242 [2022-03-18 11:49:41,047 INFO L912 BasicCegarLoop]: 43 mSDtfsCounter, 12720 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 11895 mSolverCounterSat, 6532 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12720 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 18427 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 6532 IncrementalHoareTripleChecker+Valid, 11895 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.0s IncrementalHoareTripleChecker+Time [2022-03-18 11:49:41,047 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [12720 Valid, 57 Invalid, 18427 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [6532 Valid, 11895 Invalid, 0 Unknown, 0 Unchecked, 7.0s Time] [2022-03-18 11:49:41,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20541 states. [2022-03-18 11:49:41,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20541 to 4779. [2022-03-18 11:49:41,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4779 states, 4144 states have (on average 1.3542471042471043) internal successors, (5612), 4144 states have internal predecessors, (5612), 630 states have call successors, (630), 6 states have call predecessors, (630), 4 states have return successors, (628), 628 states have call predecessors, (628), 628 states have call successors, (628) [2022-03-18 11:49:41,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4779 states to 4779 states and 6870 transitions. [2022-03-18 11:49:41,761 INFO L78 Accepts]: Start accepts. Automaton has 4779 states and 6870 transitions. Word has length 796 [2022-03-18 11:49:41,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 11:49:41,761 INFO L478 AbstractCegarLoop]: Abstraction has 4779 states and 6870 transitions. [2022-03-18 11:49:41,761 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 205 states, 205 states have (on average 2.078048780487805) internal successors, (426), 203 states have internal predecessors, (426), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 11:49:41,762 INFO L276 IsEmpty]: Start isEmpty. Operand 4779 states and 6870 transitions. [2022-03-18 11:49:41,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1504 [2022-03-18 11:49:41,785 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 11:49:41,786 INFO L500 BasicCegarLoop]: trace histogram [200, 200, 200, 200, 200, 200, 200, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 11:49:41,806 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-03-18 11:49:41,999 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 [2022-03-18 11:49:41,999 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 11:49:42,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 11:49:42,000 INFO L85 PathProgramCache]: Analyzing trace with hash -222983282, now seen corresponding path program 8 times [2022-03-18 11:49:42,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 11:49:42,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305637695] [2022-03-18 11:49:42,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 11:49:42,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 11:49:42,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 11:49:53,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 11:49:53,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 11:49:53,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1407 [2022-03-18 11:49:53,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 11:49:53,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1416 [2022-03-18 11:49:53,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 11:49:53,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1425 [2022-03-18 11:49:53,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 11:49:53,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1434 [2022-03-18 11:49:53,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 11:49:53,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1443 [2022-03-18 11:49:53,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 11:49:53,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1452 [2022-03-18 11:49:53,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 11:49:53,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1461 [2022-03-18 11:49:53,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 11:49:53,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1470 [2022-03-18 11:49:53,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 11:49:53,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1479 [2022-03-18 11:49:53,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 11:49:53,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1488 [2022-03-18 11:49:53,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 11:49:53,533 INFO L134 CoverageAnalysis]: Checked inductivity of 142105 backedges. 0 proven. 40000 refuted. 0 times theorem prover too weak. 102105 trivial. 0 not checked. [2022-03-18 11:49:53,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 11:49:53,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305637695] [2022-03-18 11:49:53,533 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305637695] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 11:49:53,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414995080] [2022-03-18 11:49:53,534 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 11:49:53,534 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 11:49:53,534 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 11:49:53,535 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) [2022-03-18 11:49:53,536 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-18 11:49:54,292 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 11:49:54,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 11:49:54,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 5598 conjuncts, 202 conjunts are in the unsatisfiable core [2022-03-18 11:49:54,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 11:49:55,809 INFO L134 CoverageAnalysis]: Checked inductivity of 142105 backedges. 0 proven. 40000 refuted. 0 times theorem prover too weak. 102105 trivial. 0 not checked. [2022-03-18 11:49:55,810 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 11:50:29,009 INFO L134 CoverageAnalysis]: Checked inductivity of 142105 backedges. 0 proven. 40000 refuted. 0 times theorem prover too weak. 102105 trivial. 0 not checked. [2022-03-18 11:50:29,010 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1414995080] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 11:50:29,010 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 11:50:29,010 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [205, 203, 203] total 407 [2022-03-18 11:50:29,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857809091] [2022-03-18 11:50:29,010 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 11:50:29,012 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 407 states [2022-03-18 11:50:29,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 11:50:29,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 407 interpolants. [2022-03-18 11:50:29,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81814, Invalid=83428, Unknown=0, NotChecked=0, Total=165242 [2022-03-18 11:50:29,047 INFO L87 Difference]: Start difference. First operand 4779 states and 6870 transitions. Second operand has 407 states, 407 states have (on average 2.039312039312039) internal successors, (830), 405 states have internal predecessors, (830), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3)