/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-examples/relax-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 18:39:24,914 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 18:39:24,917 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 18:39:24,929 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-06 18:39:24,929 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-06 18:39:24,930 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-06 18:39:24,931 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-06 18:39:24,933 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-06 18:39:24,935 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-06 18:39:24,936 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-06 18:39:24,937 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-06 18:39:24,938 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-06 18:39:24,938 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 18:39:24,939 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 18:39:24,940 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 18:39:24,941 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 18:39:24,942 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 18:39:24,943 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 18:39:24,945 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 18:39:24,947 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 18:39:24,949 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 18:39:24,950 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 18:39:24,951 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 18:39:24,952 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 18:39:24,955 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-06 18:39:24,955 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-06 18:39:24,956 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-06 18:39:24,957 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-06 18:39:24,957 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-06 18:39:24,958 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-06 18:39:24,958 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-06 18:39:24,959 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-06 18:39:24,960 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-06 18:39:24,961 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-06 18:39:24,962 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-06 18:39:24,962 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-06 18:39:24,963 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-06 18:39:24,963 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-06 18:39:24,964 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 18:39:24,965 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 18:39:24,965 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 18:39:24,966 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 [2019-11-06 18:39:24,981 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 18:39:24,981 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 18:39:24,983 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 18:39:24,983 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 18:39:24,983 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 18:39:24,983 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 18:39:24,984 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 18:39:24,984 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 18:39:24,984 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 18:39:24,984 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 18:39:24,984 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 18:39:24,985 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 18:39:24,985 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 18:39:24,985 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 18:39:24,985 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 18:39:24,985 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 18:39:24,986 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 18:39:24,986 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 18:39:24,986 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 18:39:24,986 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 18:39:24,986 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 18:39:24,986 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 18:39:24,987 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 18:39:24,987 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 18:39:24,987 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 18:39:24,987 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 18:39:24,987 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 18:39:24,988 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 18:39:24,988 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 18:39:25,263 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 18:39:25,277 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 18:39:25,282 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 18:39:25,283 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 18:39:25,284 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 18:39:25,285 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/relax-2.i [2019-11-06 18:39:25,365 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dd6fe8772/f796926db29d496ba863eaa44a039032/FLAG3fb2a71e5 [2019-11-06 18:39:25,940 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 18:39:25,940 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/relax-2.i [2019-11-06 18:39:25,954 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dd6fe8772/f796926db29d496ba863eaa44a039032/FLAG3fb2a71e5 [2019-11-06 18:39:26,174 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dd6fe8772/f796926db29d496ba863eaa44a039032 [2019-11-06 18:39:26,186 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 18:39:26,188 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 18:39:26,190 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 18:39:26,191 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 18:39:26,194 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 18:39:26,195 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 06:39:26" (1/1) ... [2019-11-06 18:39:26,198 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@67b930ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:39:26, skipping insertion in model container [2019-11-06 18:39:26,198 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 06:39:26" (1/1) ... [2019-11-06 18:39:26,207 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 18:39:26,263 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 18:39:26,720 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 18:39:26,742 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 18:39:26,820 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 18:39:26,876 INFO L192 MainTranslator]: Completed translation [2019-11-06 18:39:26,876 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:39:26 WrapperNode [2019-11-06 18:39:26,876 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 18:39:26,877 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 18:39:26,877 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 18:39:26,877 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 18:39:26,891 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:39:26" (1/1) ... [2019-11-06 18:39:26,891 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:39:26" (1/1) ... [2019-11-06 18:39:26,913 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:39:26" (1/1) ... [2019-11-06 18:39:26,913 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:39:26" (1/1) ... [2019-11-06 18:39:26,930 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:39:26" (1/1) ... [2019-11-06 18:39:26,945 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:39:26" (1/1) ... [2019-11-06 18:39:26,949 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:39:26" (1/1) ... [2019-11-06 18:39:26,963 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 18:39:26,963 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 18:39:26,964 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 18:39:26,964 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 18:39:26,965 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:39:26" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 18:39:27,016 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 18:39:27,016 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 18:39:27,016 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-11-06 18:39:27,017 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2019-11-06 18:39:27,017 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2019-11-06 18:39:27,017 INFO L138 BoogieDeclarations]: Found implementation of procedure is_relaxed_prefix [2019-11-06 18:39:27,017 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 18:39:27,017 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_ulong [2019-11-06 18:39:27,018 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 18:39:27,018 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-11-06 18:39:27,018 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 18:39:27,018 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-11-06 18:39:27,018 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2019-11-06 18:39:27,019 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2019-11-06 18:39:27,019 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2019-11-06 18:39:27,019 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2019-11-06 18:39:27,019 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2019-11-06 18:39:27,019 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2019-11-06 18:39:27,020 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2019-11-06 18:39:27,020 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2019-11-06 18:39:27,020 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2019-11-06 18:39:27,020 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2019-11-06 18:39:27,020 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2019-11-06 18:39:27,020 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2019-11-06 18:39:27,021 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2019-11-06 18:39:27,021 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2019-11-06 18:39:27,021 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2019-11-06 18:39:27,021 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2019-11-06 18:39:27,021 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2019-11-06 18:39:27,021 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2019-11-06 18:39:27,022 INFO L130 BoogieDeclarations]: Found specification of procedure select [2019-11-06 18:39:27,022 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2019-11-06 18:39:27,022 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2019-11-06 18:39:27,022 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2019-11-06 18:39:27,022 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2019-11-06 18:39:27,022 INFO L130 BoogieDeclarations]: Found specification of procedure random [2019-11-06 18:39:27,022 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2019-11-06 18:39:27,023 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2019-11-06 18:39:27,023 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2019-11-06 18:39:27,023 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2019-11-06 18:39:27,023 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2019-11-06 18:39:27,023 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2019-11-06 18:39:27,023 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2019-11-06 18:39:27,024 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2019-11-06 18:39:27,024 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2019-11-06 18:39:27,024 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2019-11-06 18:39:27,024 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2019-11-06 18:39:27,024 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2019-11-06 18:39:27,024 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2019-11-06 18:39:27,024 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2019-11-06 18:39:27,025 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2019-11-06 18:39:27,025 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2019-11-06 18:39:27,025 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2019-11-06 18:39:27,025 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2019-11-06 18:39:27,025 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2019-11-06 18:39:27,025 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2019-11-06 18:39:27,025 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2019-11-06 18:39:27,026 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2019-11-06 18:39:27,026 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2019-11-06 18:39:27,026 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2019-11-06 18:39:27,026 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2019-11-06 18:39:27,026 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2019-11-06 18:39:27,026 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2019-11-06 18:39:27,026 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2019-11-06 18:39:27,027 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-11-06 18:39:27,027 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2019-11-06 18:39:27,027 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2019-11-06 18:39:27,027 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-11-06 18:39:27,027 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2019-11-06 18:39:27,027 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2019-11-06 18:39:27,027 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2019-11-06 18:39:27,028 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2019-11-06 18:39:27,028 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2019-11-06 18:39:27,028 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2019-11-06 18:39:27,028 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2019-11-06 18:39:27,028 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 18:39:27,028 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2019-11-06 18:39:27,029 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2019-11-06 18:39:27,029 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2019-11-06 18:39:27,029 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2019-11-06 18:39:27,029 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2019-11-06 18:39:27,029 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2019-11-06 18:39:27,029 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2019-11-06 18:39:27,030 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2019-11-06 18:39:27,030 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2019-11-06 18:39:27,030 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2019-11-06 18:39:27,030 INFO L130 BoogieDeclarations]: Found specification of procedure system [2019-11-06 18:39:27,030 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2019-11-06 18:39:27,030 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2019-11-06 18:39:27,030 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2019-11-06 18:39:27,031 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2019-11-06 18:39:27,031 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2019-11-06 18:39:27,031 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2019-11-06 18:39:27,031 INFO L130 BoogieDeclarations]: Found specification of procedure div [2019-11-06 18:39:27,031 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2019-11-06 18:39:27,031 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2019-11-06 18:39:27,032 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2019-11-06 18:39:27,032 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2019-11-06 18:39:27,032 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2019-11-06 18:39:27,032 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2019-11-06 18:39:27,032 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2019-11-06 18:39:27,032 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2019-11-06 18:39:27,032 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2019-11-06 18:39:27,033 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2019-11-06 18:39:27,033 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2019-11-06 18:39:27,033 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2019-11-06 18:39:27,033 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2019-11-06 18:39:27,033 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2019-11-06 18:39:27,033 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2019-11-06 18:39:27,034 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2019-11-06 18:39:27,034 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2019-11-06 18:39:27,034 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2019-11-06 18:39:27,034 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2019-11-06 18:39:27,034 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2019-11-06 18:39:27,034 INFO L130 BoogieDeclarations]: Found specification of procedure is_relaxed_prefix [2019-11-06 18:39:27,034 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-06 18:39:27,035 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 18:39:27,035 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-06 18:39:27,035 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-06 18:39:27,035 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 18:39:27,035 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 18:39:27,035 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-06 18:39:27,612 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 18:39:27,612 INFO L284 CfgBuilder]: Removed 5 assume(true) statements. [2019-11-06 18:39:27,613 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 06:39:27 BoogieIcfgContainer [2019-11-06 18:39:27,613 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 18:39:27,614 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 18:39:27,615 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 18:39:27,618 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 18:39:27,618 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 06:39:26" (1/3) ... [2019-11-06 18:39:27,619 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17f962a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 06:39:27, skipping insertion in model container [2019-11-06 18:39:27,619 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:39:26" (2/3) ... [2019-11-06 18:39:27,619 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17f962a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 06:39:27, skipping insertion in model container [2019-11-06 18:39:27,620 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 06:39:27" (3/3) ... [2019-11-06 18:39:27,621 INFO L109 eAbstractionObserver]: Analyzing ICFG relax-2.i [2019-11-06 18:39:27,631 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 18:39:27,638 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 18:39:27,650 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 18:39:27,673 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 18:39:27,673 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 18:39:27,673 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 18:39:27,674 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 18:39:27,675 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 18:39:27,675 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 18:39:27,683 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 18:39:27,683 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 18:39:27,704 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states. [2019-11-06 18:39:27,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-06 18:39:27,712 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:39:27,713 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:39:27,715 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:39:27,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:39:27,720 INFO L82 PathProgramCache]: Analyzing trace with hash -1056215727, now seen corresponding path program 1 times [2019-11-06 18:39:27,726 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:39:27,727 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665338076] [2019-11-06 18:39:27,727 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:39:27,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:27,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:27,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:28,028 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:39:28,029 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665338076] [2019-11-06 18:39:28,029 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 18:39:28,030 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-06 18:39:28,031 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124126709] [2019-11-06 18:39:28,036 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 18:39:28,036 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:39:28,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 18:39:28,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-06 18:39:28,053 INFO L87 Difference]: Start difference. First operand 50 states. Second operand 5 states. [2019-11-06 18:39:28,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:39:28,314 INFO L93 Difference]: Finished difference Result 95 states and 146 transitions. [2019-11-06 18:39:28,315 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-06 18:39:28,316 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2019-11-06 18:39:28,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:39:28,327 INFO L225 Difference]: With dead ends: 95 [2019-11-06 18:39:28,327 INFO L226 Difference]: Without dead ends: 48 [2019-11-06 18:39:28,331 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-06 18:39:28,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2019-11-06 18:39:28,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2019-11-06 18:39:28,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2019-11-06 18:39:28,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 64 transitions. [2019-11-06 18:39:28,377 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 64 transitions. Word has length 19 [2019-11-06 18:39:28,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:39:28,379 INFO L462 AbstractCegarLoop]: Abstraction has 48 states and 64 transitions. [2019-11-06 18:39:28,379 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 18:39:28,379 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 64 transitions. [2019-11-06 18:39:28,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-06 18:39:28,382 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:39:28,382 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:39:28,382 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:39:28,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:39:28,383 INFO L82 PathProgramCache]: Analyzing trace with hash -864018085, now seen corresponding path program 1 times [2019-11-06 18:39:28,383 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:39:28,383 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861931204] [2019-11-06 18:39:28,384 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:39:28,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:28,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:28,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:28,562 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:39:28,563 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861931204] [2019-11-06 18:39:28,563 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 18:39:28,563 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-11-06 18:39:28,563 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867087820] [2019-11-06 18:39:28,565 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-06 18:39:28,565 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:39:28,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-06 18:39:28,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-11-06 18:39:28,566 INFO L87 Difference]: Start difference. First operand 48 states and 64 transitions. Second operand 7 states. [2019-11-06 18:39:28,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:39:28,886 INFO L93 Difference]: Finished difference Result 88 states and 119 transitions. [2019-11-06 18:39:28,887 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-06 18:39:28,888 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 21 [2019-11-06 18:39:28,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:39:28,889 INFO L225 Difference]: With dead ends: 88 [2019-11-06 18:39:28,889 INFO L226 Difference]: Without dead ends: 60 [2019-11-06 18:39:28,891 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2019-11-06 18:39:28,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-11-06 18:39:28,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 57. [2019-11-06 18:39:28,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2019-11-06 18:39:28,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 77 transitions. [2019-11-06 18:39:28,905 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 77 transitions. Word has length 21 [2019-11-06 18:39:28,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:39:28,906 INFO L462 AbstractCegarLoop]: Abstraction has 57 states and 77 transitions. [2019-11-06 18:39:28,907 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-06 18:39:28,907 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 77 transitions. [2019-11-06 18:39:28,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-11-06 18:39:28,909 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:39:28,909 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:39:28,910 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:39:28,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:39:28,910 INFO L82 PathProgramCache]: Analyzing trace with hash 2053893332, now seen corresponding path program 1 times [2019-11-06 18:39:28,910 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:39:28,910 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742518003] [2019-11-06 18:39:28,911 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:39:28,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:29,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:29,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:29,156 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:39:29,157 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742518003] [2019-11-06 18:39:29,157 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 18:39:29,157 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-11-06 18:39:29,158 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338642757] [2019-11-06 18:39:29,158 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-06 18:39:29,158 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:39:29,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-06 18:39:29,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-11-06 18:39:29,159 INFO L87 Difference]: Start difference. First operand 57 states and 77 transitions. Second operand 7 states. [2019-11-06 18:39:29,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:39:29,467 INFO L93 Difference]: Finished difference Result 74 states and 96 transitions. [2019-11-06 18:39:29,468 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 18:39:29,468 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 22 [2019-11-06 18:39:29,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:39:29,474 INFO L225 Difference]: With dead ends: 74 [2019-11-06 18:39:29,475 INFO L226 Difference]: Without dead ends: 63 [2019-11-06 18:39:29,475 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2019-11-06 18:39:29,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2019-11-06 18:39:29,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 61. [2019-11-06 18:39:29,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2019-11-06 18:39:29,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 82 transitions. [2019-11-06 18:39:29,497 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 82 transitions. Word has length 22 [2019-11-06 18:39:29,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:39:29,498 INFO L462 AbstractCegarLoop]: Abstraction has 61 states and 82 transitions. [2019-11-06 18:39:29,498 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-06 18:39:29,498 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 82 transitions. [2019-11-06 18:39:29,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-11-06 18:39:29,499 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:39:29,500 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:39:29,500 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:39:29,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:39:29,501 INFO L82 PathProgramCache]: Analyzing trace with hash 1666437145, now seen corresponding path program 1 times [2019-11-06 18:39:29,501 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:39:29,502 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525503081] [2019-11-06 18:39:29,505 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:39:29,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:29,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:29,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:29,803 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:39:29,803 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525503081] [2019-11-06 18:39:29,804 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [413706990] [2019-11-06 18:39:29,804 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:39:29,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:29,937 INFO L256 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 19 conjunts are in the unsatisfiable core [2019-11-06 18:39:29,945 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:39:30,052 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 18:39:30,095 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-06 18:39:30,096 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 18:39:30,096 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10] total 15 [2019-11-06 18:39:30,096 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305675923] [2019-11-06 18:39:30,097 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-06 18:39:30,097 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:39:30,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-06 18:39:30,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2019-11-06 18:39:30,098 INFO L87 Difference]: Start difference. First operand 61 states and 82 transitions. Second operand 7 states. [2019-11-06 18:39:30,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:39:30,267 INFO L93 Difference]: Finished difference Result 71 states and 91 transitions. [2019-11-06 18:39:30,268 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 18:39:30,268 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 23 [2019-11-06 18:39:30,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:39:30,269 INFO L225 Difference]: With dead ends: 71 [2019-11-06 18:39:30,270 INFO L226 Difference]: Without dead ends: 69 [2019-11-06 18:39:30,270 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2019-11-06 18:39:30,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2019-11-06 18:39:30,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 65. [2019-11-06 18:39:30,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2019-11-06 18:39:30,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 85 transitions. [2019-11-06 18:39:30,280 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 85 transitions. Word has length 23 [2019-11-06 18:39:30,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:39:30,280 INFO L462 AbstractCegarLoop]: Abstraction has 65 states and 85 transitions. [2019-11-06 18:39:30,280 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-06 18:39:30,280 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 85 transitions. [2019-11-06 18:39:30,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-11-06 18:39:30,282 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:39:30,282 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:39:30,485 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:39:30,486 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:39:30,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:39:30,486 INFO L82 PathProgramCache]: Analyzing trace with hash -1672526710, now seen corresponding path program 1 times [2019-11-06 18:39:30,487 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:39:30,487 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021636979] [2019-11-06 18:39:30,487 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:39:30,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:30,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:30,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:30,570 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:39:30,571 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021636979] [2019-11-06 18:39:30,571 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 18:39:30,571 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-06 18:39:30,571 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597432427] [2019-11-06 18:39:30,572 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 18:39:30,572 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:39:30,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 18:39:30,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-06 18:39:30,573 INFO L87 Difference]: Start difference. First operand 65 states and 85 transitions. Second operand 5 states. [2019-11-06 18:39:30,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:39:30,714 INFO L93 Difference]: Finished difference Result 77 states and 99 transitions. [2019-11-06 18:39:30,714 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-06 18:39:30,714 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 24 [2019-11-06 18:39:30,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:39:30,715 INFO L225 Difference]: With dead ends: 77 [2019-11-06 18:39:30,715 INFO L226 Difference]: Without dead ends: 57 [2019-11-06 18:39:30,716 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-06 18:39:30,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2019-11-06 18:39:30,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 53. [2019-11-06 18:39:30,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-11-06 18:39:30,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 67 transitions. [2019-11-06 18:39:30,723 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 67 transitions. Word has length 24 [2019-11-06 18:39:30,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:39:30,723 INFO L462 AbstractCegarLoop]: Abstraction has 53 states and 67 transitions. [2019-11-06 18:39:30,724 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 18:39:30,724 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 67 transitions. [2019-11-06 18:39:30,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-11-06 18:39:30,725 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:39:30,725 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:39:30,725 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:39:30,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:39:30,725 INFO L82 PathProgramCache]: Analyzing trace with hash -1108220204, now seen corresponding path program 1 times [2019-11-06 18:39:30,726 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:39:30,726 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747112910] [2019-11-06 18:39:30,726 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:39:30,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:30,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:30,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:30,916 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:39:30,916 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747112910] [2019-11-06 18:39:30,916 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 18:39:30,916 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2019-11-06 18:39:30,917 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157610050] [2019-11-06 18:39:30,917 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-06 18:39:30,917 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:39:30,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-06 18:39:30,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2019-11-06 18:39:30,918 INFO L87 Difference]: Start difference. First operand 53 states and 67 transitions. Second operand 9 states. [2019-11-06 18:39:31,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:39:31,326 INFO L93 Difference]: Finished difference Result 97 states and 128 transitions. [2019-11-06 18:39:31,327 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-06 18:39:31,327 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 24 [2019-11-06 18:39:31,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:39:31,329 INFO L225 Difference]: With dead ends: 97 [2019-11-06 18:39:31,329 INFO L226 Difference]: Without dead ends: 80 [2019-11-06 18:39:31,332 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2019-11-06 18:39:31,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2019-11-06 18:39:31,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 53. [2019-11-06 18:39:31,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-11-06 18:39:31,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 66 transitions. [2019-11-06 18:39:31,350 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 66 transitions. Word has length 24 [2019-11-06 18:39:31,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:39:31,353 INFO L462 AbstractCegarLoop]: Abstraction has 53 states and 66 transitions. [2019-11-06 18:39:31,353 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-06 18:39:31,353 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 66 transitions. [2019-11-06 18:39:31,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-11-06 18:39:31,354 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:39:31,355 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:39:31,355 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:39:31,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:39:31,355 INFO L82 PathProgramCache]: Analyzing trace with hash -351644855, now seen corresponding path program 1 times [2019-11-06 18:39:31,355 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:39:31,359 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793503546] [2019-11-06 18:39:31,359 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:39:31,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:31,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:31,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:31,419 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-06 18:39:31,419 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793503546] [2019-11-06 18:39:31,419 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 18:39:31,419 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 18:39:31,420 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821353338] [2019-11-06 18:39:31,420 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 18:39:31,420 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:39:31,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 18:39:31,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 18:39:31,421 INFO L87 Difference]: Start difference. First operand 53 states and 66 transitions. Second operand 4 states. [2019-11-06 18:39:31,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:39:31,514 INFO L93 Difference]: Finished difference Result 77 states and 96 transitions. [2019-11-06 18:39:31,515 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 18:39:31,515 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 26 [2019-11-06 18:39:31,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:39:31,516 INFO L225 Difference]: With dead ends: 77 [2019-11-06 18:39:31,516 INFO L226 Difference]: Without dead ends: 62 [2019-11-06 18:39:31,517 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-06 18:39:31,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-11-06 18:39:31,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 57. [2019-11-06 18:39:31,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2019-11-06 18:39:31,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 72 transitions. [2019-11-06 18:39:31,524 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 72 transitions. Word has length 26 [2019-11-06 18:39:31,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:39:31,524 INFO L462 AbstractCegarLoop]: Abstraction has 57 states and 72 transitions. [2019-11-06 18:39:31,524 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 18:39:31,524 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 72 transitions. [2019-11-06 18:39:31,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-11-06 18:39:31,525 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:39:31,525 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:39:31,526 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:39:31,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:39:31,526 INFO L82 PathProgramCache]: Analyzing trace with hash -1017570191, now seen corresponding path program 1 times [2019-11-06 18:39:31,526 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:39:31,526 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189543359] [2019-11-06 18:39:31,527 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:39:31,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:31,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:31,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:31,568 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-06 18:39:31,568 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189543359] [2019-11-06 18:39:31,568 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 18:39:31,568 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 18:39:31,569 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994375023] [2019-11-06 18:39:31,569 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 18:39:31,569 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:39:31,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 18:39:31,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 18:39:31,570 INFO L87 Difference]: Start difference. First operand 57 states and 72 transitions. Second operand 4 states. [2019-11-06 18:39:31,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:39:31,680 INFO L93 Difference]: Finished difference Result 75 states and 93 transitions. [2019-11-06 18:39:31,680 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 18:39:31,680 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2019-11-06 18:39:31,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:39:31,681 INFO L225 Difference]: With dead ends: 75 [2019-11-06 18:39:31,682 INFO L226 Difference]: Without dead ends: 60 [2019-11-06 18:39:31,682 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-06 18:39:31,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-11-06 18:39:31,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 58. [2019-11-06 18:39:31,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-11-06 18:39:31,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 73 transitions. [2019-11-06 18:39:31,689 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 73 transitions. Word has length 27 [2019-11-06 18:39:31,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:39:31,689 INFO L462 AbstractCegarLoop]: Abstraction has 58 states and 73 transitions. [2019-11-06 18:39:31,689 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 18:39:31,689 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 73 transitions. [2019-11-06 18:39:31,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-11-06 18:39:31,690 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:39:31,690 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:39:31,691 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:39:31,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:39:31,691 INFO L82 PathProgramCache]: Analyzing trace with hash -1141713006, now seen corresponding path program 1 times [2019-11-06 18:39:31,691 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:39:31,691 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461512417] [2019-11-06 18:39:31,692 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:39:31,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:31,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:31,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:31,901 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-06 18:39:31,902 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461512417] [2019-11-06 18:39:31,902 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271225318] [2019-11-06 18:39:31,902 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:39:31,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:31,995 INFO L256 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-06 18:39:31,998 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:39:32,045 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-06 18:39:32,046 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:39:32,046 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 11 [2019-11-06 18:39:32,047 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017499891] [2019-11-06 18:39:32,048 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-06 18:39:32,048 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:39:32,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-06 18:39:32,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2019-11-06 18:39:32,049 INFO L87 Difference]: Start difference. First operand 58 states and 73 transitions. Second operand 11 states. [2019-11-06 18:39:36,358 WARN L191 SmtUtils]: Spent 4.12 s on a formula simplification. DAG size of input: 41 DAG size of output: 34 [2019-11-06 18:39:37,776 WARN L191 SmtUtils]: Spent 1.37 s on a formula simplification. DAG size of input: 38 DAG size of output: 31 [2019-11-06 18:39:37,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:39:37,963 INFO L93 Difference]: Finished difference Result 104 states and 134 transitions. [2019-11-06 18:39:37,963 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-06 18:39:37,964 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 30 [2019-11-06 18:39:37,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:39:37,965 INFO L225 Difference]: With dead ends: 104 [2019-11-06 18:39:37,966 INFO L226 Difference]: Without dead ends: 68 [2019-11-06 18:39:37,967 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2019-11-06 18:39:37,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2019-11-06 18:39:37,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 59. [2019-11-06 18:39:37,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2019-11-06 18:39:37,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 74 transitions. [2019-11-06 18:39:37,974 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 74 transitions. Word has length 30 [2019-11-06 18:39:37,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:39:37,974 INFO L462 AbstractCegarLoop]: Abstraction has 59 states and 74 transitions. [2019-11-06 18:39:37,974 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-06 18:39:37,974 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 74 transitions. [2019-11-06 18:39:37,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-11-06 18:39:37,975 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:39:37,975 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:39:38,178 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:39:38,179 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:39:38,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:39:38,180 INFO L82 PathProgramCache]: Analyzing trace with hash 1929209556, now seen corresponding path program 1 times [2019-11-06 18:39:38,180 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:39:38,180 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37329413] [2019-11-06 18:39:38,181 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:39:38,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:38,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:38,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:38,294 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-06 18:39:38,294 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37329413] [2019-11-06 18:39:38,294 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1208063683] [2019-11-06 18:39:38,295 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:39:38,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:38,391 INFO L256 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 17 conjunts are in the unsatisfiable core [2019-11-06 18:39:38,395 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:39:38,479 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-06 18:39:38,479 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:39:38,479 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2019-11-06 18:39:38,479 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209724172] [2019-11-06 18:39:38,480 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-06 18:39:38,480 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:39:38,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-06 18:39:38,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2019-11-06 18:39:38,481 INFO L87 Difference]: Start difference. First operand 59 states and 74 transitions. Second operand 10 states. [2019-11-06 18:39:38,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:39:38,866 INFO L93 Difference]: Finished difference Result 115 states and 153 transitions. [2019-11-06 18:39:38,866 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-06 18:39:38,866 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 32 [2019-11-06 18:39:38,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:39:38,868 INFO L225 Difference]: With dead ends: 115 [2019-11-06 18:39:38,868 INFO L226 Difference]: Without dead ends: 100 [2019-11-06 18:39:38,869 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2019-11-06 18:39:38,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2019-11-06 18:39:38,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 76. [2019-11-06 18:39:38,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2019-11-06 18:39:38,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 98 transitions. [2019-11-06 18:39:38,878 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 98 transitions. Word has length 32 [2019-11-06 18:39:38,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:39:38,878 INFO L462 AbstractCegarLoop]: Abstraction has 76 states and 98 transitions. [2019-11-06 18:39:38,878 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-06 18:39:38,878 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 98 transitions. [2019-11-06 18:39:38,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-11-06 18:39:38,883 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:39:38,883 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:39:39,088 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:39:39,088 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:39:39,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:39:39,089 INFO L82 PathProgramCache]: Analyzing trace with hash 1931056598, now seen corresponding path program 1 times [2019-11-06 18:39:39,089 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:39:39,090 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204529797] [2019-11-06 18:39:39,090 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:39:39,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:39,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:39,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:39,187 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-06 18:39:39,187 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204529797] [2019-11-06 18:39:39,187 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 18:39:39,187 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 18:39:39,188 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082995891] [2019-11-06 18:39:39,188 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 18:39:39,189 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:39:39,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 18:39:39,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-06 18:39:39,189 INFO L87 Difference]: Start difference. First operand 76 states and 98 transitions. Second operand 6 states. [2019-11-06 18:39:39,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:39:39,376 INFO L93 Difference]: Finished difference Result 101 states and 131 transitions. [2019-11-06 18:39:39,376 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 18:39:39,376 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 32 [2019-11-06 18:39:39,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:39:39,377 INFO L225 Difference]: With dead ends: 101 [2019-11-06 18:39:39,378 INFO L226 Difference]: Without dead ends: 93 [2019-11-06 18:39:39,378 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2019-11-06 18:39:39,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2019-11-06 18:39:39,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 79. [2019-11-06 18:39:39,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2019-11-06 18:39:39,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 102 transitions. [2019-11-06 18:39:39,388 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 102 transitions. Word has length 32 [2019-11-06 18:39:39,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:39:39,388 INFO L462 AbstractCegarLoop]: Abstraction has 79 states and 102 transitions. [2019-11-06 18:39:39,388 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 18:39:39,388 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 102 transitions. [2019-11-06 18:39:39,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-11-06 18:39:39,389 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:39:39,389 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:39:39,390 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:39:39,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:39:39,390 INFO L82 PathProgramCache]: Analyzing trace with hash -561400490, now seen corresponding path program 2 times [2019-11-06 18:39:39,390 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:39:39,390 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351455560] [2019-11-06 18:39:39,391 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:39:39,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:39,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:39,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:39,467 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-06 18:39:39,468 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351455560] [2019-11-06 18:39:39,468 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 18:39:39,468 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 18:39:39,469 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117844849] [2019-11-06 18:39:39,469 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 18:39:39,469 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:39:39,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 18:39:39,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-06 18:39:39,470 INFO L87 Difference]: Start difference. First operand 79 states and 102 transitions. Second operand 6 states. [2019-11-06 18:39:39,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:39:39,697 INFO L93 Difference]: Finished difference Result 90 states and 114 transitions. [2019-11-06 18:39:39,697 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-06 18:39:39,697 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 34 [2019-11-06 18:39:39,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:39:39,699 INFO L225 Difference]: With dead ends: 90 [2019-11-06 18:39:39,700 INFO L226 Difference]: Without dead ends: 82 [2019-11-06 18:39:39,700 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2019-11-06 18:39:39,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2019-11-06 18:39:39,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 78. [2019-11-06 18:39:39,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2019-11-06 18:39:39,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 100 transitions. [2019-11-06 18:39:39,719 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 100 transitions. Word has length 34 [2019-11-06 18:39:39,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:39:39,719 INFO L462 AbstractCegarLoop]: Abstraction has 78 states and 100 transitions. [2019-11-06 18:39:39,720 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 18:39:39,720 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 100 transitions. [2019-11-06 18:39:39,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-11-06 18:39:39,721 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:39:39,721 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:39:39,722 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:39:39,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:39:39,722 INFO L82 PathProgramCache]: Analyzing trace with hash -455583279, now seen corresponding path program 1 times [2019-11-06 18:39:39,723 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:39:39,723 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419391193] [2019-11-06 18:39:39,723 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:39:39,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:39,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:39,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:44,360 WARN L191 SmtUtils]: Spent 2.03 s on a formula simplification. DAG size of input: 53 DAG size of output: 48 [2019-11-06 18:39:44,458 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-06 18:39:44,458 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419391193] [2019-11-06 18:39:44,458 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561116057] [2019-11-06 18:39:44,459 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:39:44,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:44,552 INFO L256 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-06 18:39:44,554 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:39:44,669 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-06 18:39:44,669 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 18:39:44,669 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [13] total 16 [2019-11-06 18:39:44,670 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756859628] [2019-11-06 18:39:44,670 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 18:39:44,670 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:39:44,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 18:39:44,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=204, Unknown=1, NotChecked=0, Total=240 [2019-11-06 18:39:44,676 INFO L87 Difference]: Start difference. First operand 78 states and 100 transitions. Second operand 5 states. [2019-11-06 18:39:44,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:39:44,778 INFO L93 Difference]: Finished difference Result 110 states and 141 transitions. [2019-11-06 18:39:44,779 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-06 18:39:44,780 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 35 [2019-11-06 18:39:44,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:39:44,781 INFO L225 Difference]: With dead ends: 110 [2019-11-06 18:39:44,781 INFO L226 Difference]: Without dead ends: 96 [2019-11-06 18:39:44,782 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=40, Invalid=231, Unknown=1, NotChecked=0, Total=272 [2019-11-06 18:39:44,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2019-11-06 18:39:44,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 87. [2019-11-06 18:39:44,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2019-11-06 18:39:44,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 111 transitions. [2019-11-06 18:39:44,792 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 111 transitions. Word has length 35 [2019-11-06 18:39:44,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:39:44,793 INFO L462 AbstractCegarLoop]: Abstraction has 87 states and 111 transitions. [2019-11-06 18:39:44,793 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 18:39:44,793 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 111 transitions. [2019-11-06 18:39:44,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-11-06 18:39:44,794 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:39:44,794 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:39:44,998 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:39:44,998 INFO L410 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:39:44,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:39:44,999 INFO L82 PathProgramCache]: Analyzing trace with hash -150105135, now seen corresponding path program 1 times [2019-11-06 18:39:44,999 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:39:44,999 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895615289] [2019-11-06 18:39:45,000 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:39:45,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:45,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:45,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:45,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:45,106 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-06 18:39:45,107 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895615289] [2019-11-06 18:39:45,107 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467125962] [2019-11-06 18:39:45,107 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:39:45,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:45,206 INFO L256 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 17 conjunts are in the unsatisfiable core [2019-11-06 18:39:45,209 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:39:45,340 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-06 18:39:45,341 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 18:39:45,341 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 14 [2019-11-06 18:39:45,341 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378148126] [2019-11-06 18:39:45,343 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-06 18:39:45,343 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:39:45,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-06 18:39:45,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2019-11-06 18:39:45,344 INFO L87 Difference]: Start difference. First operand 87 states and 111 transitions. Second operand 7 states. [2019-11-06 18:39:45,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:39:45,473 INFO L93 Difference]: Finished difference Result 118 states and 151 transitions. [2019-11-06 18:39:45,474 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 18:39:45,474 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 37 [2019-11-06 18:39:45,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:39:45,475 INFO L225 Difference]: With dead ends: 118 [2019-11-06 18:39:45,475 INFO L226 Difference]: Without dead ends: 92 [2019-11-06 18:39:45,476 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2019-11-06 18:39:45,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2019-11-06 18:39:45,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 88. [2019-11-06 18:39:45,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2019-11-06 18:39:45,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 112 transitions. [2019-11-06 18:39:45,490 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 112 transitions. Word has length 37 [2019-11-06 18:39:45,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:39:45,491 INFO L462 AbstractCegarLoop]: Abstraction has 88 states and 112 transitions. [2019-11-06 18:39:45,491 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-06 18:39:45,491 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 112 transitions. [2019-11-06 18:39:45,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-11-06 18:39:45,492 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:39:45,492 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:39:45,695 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:39:45,696 INFO L410 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:39:45,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:39:45,697 INFO L82 PathProgramCache]: Analyzing trace with hash -1358677729, now seen corresponding path program 1 times [2019-11-06 18:39:45,697 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:39:45,698 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540795881] [2019-11-06 18:39:45,698 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:39:45,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:45,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:45,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:45,957 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-06 18:39:45,957 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540795881] [2019-11-06 18:39:45,957 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [916165049] [2019-11-06 18:39:45,958 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:39:46,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:46,057 INFO L256 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-06 18:39:46,060 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:39:46,186 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-06 18:39:46,187 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:39:46,187 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2019-11-06 18:39:46,187 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030076304] [2019-11-06 18:39:46,188 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-11-06 18:39:46,188 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:39:46,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-11-06 18:39:46,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2019-11-06 18:39:46,189 INFO L87 Difference]: Start difference. First operand 88 states and 112 transitions. Second operand 19 states. [2019-11-06 18:39:51,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:39:51,139 INFO L93 Difference]: Finished difference Result 206 states and 285 transitions. [2019-11-06 18:39:51,139 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-11-06 18:39:51,139 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 36 [2019-11-06 18:39:51,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:39:51,141 INFO L225 Difference]: With dead ends: 206 [2019-11-06 18:39:51,141 INFO L226 Difference]: Without dead ends: 158 [2019-11-06 18:39:51,144 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=128, Invalid=741, Unknown=1, NotChecked=0, Total=870 [2019-11-06 18:39:51,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2019-11-06 18:39:51,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 96. [2019-11-06 18:39:51,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2019-11-06 18:39:51,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 124 transitions. [2019-11-06 18:39:51,166 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 124 transitions. Word has length 36 [2019-11-06 18:39:51,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:39:51,167 INFO L462 AbstractCegarLoop]: Abstraction has 96 states and 124 transitions. [2019-11-06 18:39:51,167 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-11-06 18:39:51,167 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 124 transitions. [2019-11-06 18:39:51,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-11-06 18:39:51,169 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:39:51,169 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:39:51,374 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:39:51,375 INFO L410 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:39:51,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:39:51,375 INFO L82 PathProgramCache]: Analyzing trace with hash 1633694989, now seen corresponding path program 1 times [2019-11-06 18:39:51,376 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:39:51,376 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346364472] [2019-11-06 18:39:51,376 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:39:51,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:51,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:51,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:51,464 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-06 18:39:51,465 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346364472] [2019-11-06 18:39:51,465 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [374682481] [2019-11-06 18:39:51,465 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:39:51,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:51,564 INFO L256 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 21 conjunts are in the unsatisfiable core [2019-11-06 18:39:51,566 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:39:51,760 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-06 18:39:51,761 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:39:51,761 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 12] total 18 [2019-11-06 18:39:51,761 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323563657] [2019-11-06 18:39:51,761 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-11-06 18:39:51,761 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:39:51,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-11-06 18:39:51,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2019-11-06 18:39:51,762 INFO L87 Difference]: Start difference. First operand 96 states and 124 transitions. Second operand 18 states. [2019-11-06 18:39:52,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:39:52,914 INFO L93 Difference]: Finished difference Result 220 states and 312 transitions. [2019-11-06 18:39:52,914 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-11-06 18:39:52,914 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 37 [2019-11-06 18:39:52,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:39:52,920 INFO L225 Difference]: With dead ends: 220 [2019-11-06 18:39:52,920 INFO L226 Difference]: Without dead ends: 204 [2019-11-06 18:39:52,926 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=117, Invalid=695, Unknown=0, NotChecked=0, Total=812 [2019-11-06 18:39:52,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2019-11-06 18:39:52,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 118. [2019-11-06 18:39:52,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2019-11-06 18:39:52,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 157 transitions. [2019-11-06 18:39:52,948 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 157 transitions. Word has length 37 [2019-11-06 18:39:52,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:39:52,948 INFO L462 AbstractCegarLoop]: Abstraction has 118 states and 157 transitions. [2019-11-06 18:39:52,948 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-11-06 18:39:52,948 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 157 transitions. [2019-11-06 18:39:52,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-11-06 18:39:52,949 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:39:52,949 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:39:53,161 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:39:53,161 INFO L410 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:39:53,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:39:53,162 INFO L82 PathProgramCache]: Analyzing trace with hash 824348363, now seen corresponding path program 1 times [2019-11-06 18:39:53,162 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:39:53,162 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666910630] [2019-11-06 18:39:53,162 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:39:53,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:53,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:53,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:53,719 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-06 18:39:53,720 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666910630] [2019-11-06 18:39:53,720 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571809971] [2019-11-06 18:39:53,720 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:39:53,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:53,832 INFO L256 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 54 conjunts are in the unsatisfiable core [2019-11-06 18:39:53,844 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:39:53,915 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2019-11-06 18:39:53,916 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 18:39:53,923 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:39:53,924 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-06 18:39:53,924 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:11 [2019-11-06 18:39:54,180 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 18:39:54,195 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-06 18:39:54,196 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 18:39:54,227 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:39:54,228 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 69 [2019-11-06 18:39:54,229 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 18:39:54,230 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 18:39:54,233 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-06 18:39:54,260 INFO L567 ElimStorePlain]: treesize reduction 53, result has 24.3 percent of original size [2019-11-06 18:39:54,263 INFO L496 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-06 18:39:54,263 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 5 variables, input treesize:93, output treesize:8 [2019-11-06 18:39:54,294 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-06 18:39:54,294 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:39:54,294 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2019-11-06 18:39:54,295 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403555847] [2019-11-06 18:39:54,296 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-11-06 18:39:54,296 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:39:54,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-11-06 18:39:54,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2019-11-06 18:39:54,298 INFO L87 Difference]: Start difference. First operand 118 states and 157 transitions. Second operand 24 states. [2019-11-06 18:39:55,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:39:55,743 INFO L93 Difference]: Finished difference Result 269 states and 372 transitions. [2019-11-06 18:39:55,743 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-11-06 18:39:55,743 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 37 [2019-11-06 18:39:55,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:39:55,746 INFO L225 Difference]: With dead ends: 269 [2019-11-06 18:39:55,746 INFO L226 Difference]: Without dead ends: 232 [2019-11-06 18:39:55,748 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=178, Invalid=1228, Unknown=0, NotChecked=0, Total=1406 [2019-11-06 18:39:55,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2019-11-06 18:39:55,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 135. [2019-11-06 18:39:55,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2019-11-06 18:39:55,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 178 transitions. [2019-11-06 18:39:55,768 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 178 transitions. Word has length 37 [2019-11-06 18:39:55,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:39:55,769 INFO L462 AbstractCegarLoop]: Abstraction has 135 states and 178 transitions. [2019-11-06 18:39:55,769 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-11-06 18:39:55,769 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 178 transitions. [2019-11-06 18:39:55,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-11-06 18:39:55,770 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:39:55,771 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:39:56,001 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:39:56,001 INFO L410 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:39:56,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:39:56,002 INFO L82 PathProgramCache]: Analyzing trace with hash 1631292924, now seen corresponding path program 1 times [2019-11-06 18:39:56,002 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:39:56,002 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109378863] [2019-11-06 18:39:56,002 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:39:56,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:56,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:56,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:56,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:56,121 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-06 18:39:56,122 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109378863] [2019-11-06 18:39:56,122 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273594090] [2019-11-06 18:39:56,122 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:39:56,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:56,224 INFO L256 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 19 conjunts are in the unsatisfiable core [2019-11-06 18:39:56,226 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:39:56,321 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:39:56,323 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:39:56,323 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 14 [2019-11-06 18:39:56,323 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619974266] [2019-11-06 18:39:56,324 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-06 18:39:56,324 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:39:56,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-06 18:39:56,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2019-11-06 18:39:56,325 INFO L87 Difference]: Start difference. First operand 135 states and 178 transitions. Second operand 14 states. [2019-11-06 18:39:56,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:39:56,932 INFO L93 Difference]: Finished difference Result 167 states and 219 transitions. [2019-11-06 18:39:56,932 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-11-06 18:39:56,932 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 40 [2019-11-06 18:39:56,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:39:56,934 INFO L225 Difference]: With dead ends: 167 [2019-11-06 18:39:56,934 INFO L226 Difference]: Without dead ends: 133 [2019-11-06 18:39:56,935 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=110, Invalid=490, Unknown=0, NotChecked=0, Total=600 [2019-11-06 18:39:56,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2019-11-06 18:39:56,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 129. [2019-11-06 18:39:56,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2019-11-06 18:39:56,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 169 transitions. [2019-11-06 18:39:56,953 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 169 transitions. Word has length 40 [2019-11-06 18:39:56,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:39:56,953 INFO L462 AbstractCegarLoop]: Abstraction has 129 states and 169 transitions. [2019-11-06 18:39:56,953 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-06 18:39:56,953 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 169 transitions. [2019-11-06 18:39:56,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-11-06 18:39:56,954 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:39:56,954 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:39:57,167 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:39:57,167 INFO L410 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:39:57,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:39:57,168 INFO L82 PathProgramCache]: Analyzing trace with hash 1250341859, now seen corresponding path program 2 times [2019-11-06 18:39:57,168 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:39:57,169 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159442656] [2019-11-06 18:39:57,169 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:39:57,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:57,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:57,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:57,317 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-06 18:39:57,318 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159442656] [2019-11-06 18:39:57,318 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85318735] [2019-11-06 18:39:57,318 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:39:57,421 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 18:39:57,421 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:39:57,422 INFO L256 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-06 18:39:57,432 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:39:57,543 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-06 18:39:57,544 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:39:57,544 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 13 [2019-11-06 18:39:57,544 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984082002] [2019-11-06 18:39:57,544 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-06 18:39:57,545 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:39:57,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-06 18:39:57,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2019-11-06 18:39:57,545 INFO L87 Difference]: Start difference. First operand 129 states and 169 transitions. Second operand 13 states. [2019-11-06 18:39:58,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:39:58,380 INFO L93 Difference]: Finished difference Result 279 states and 383 transitions. [2019-11-06 18:39:58,381 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-11-06 18:39:58,381 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 40 [2019-11-06 18:39:58,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:39:58,383 INFO L225 Difference]: With dead ends: 279 [2019-11-06 18:39:58,384 INFO L226 Difference]: Without dead ends: 270 [2019-11-06 18:39:58,385 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=115, Invalid=391, Unknown=0, NotChecked=0, Total=506 [2019-11-06 18:39:58,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2019-11-06 18:39:58,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 134. [2019-11-06 18:39:58,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2019-11-06 18:39:58,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 176 transitions. [2019-11-06 18:39:58,407 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 176 transitions. Word has length 40 [2019-11-06 18:39:58,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:39:58,407 INFO L462 AbstractCegarLoop]: Abstraction has 134 states and 176 transitions. [2019-11-06 18:39:58,407 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-06 18:39:58,408 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 176 transitions. [2019-11-06 18:39:58,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-11-06 18:39:58,409 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:39:58,409 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:39:58,612 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:39:58,612 INFO L410 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:39:58,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:39:58,613 INFO L82 PathProgramCache]: Analyzing trace with hash -59119812, now seen corresponding path program 1 times [2019-11-06 18:39:58,613 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:39:58,613 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439772272] [2019-11-06 18:39:58,613 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:39:58,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:58,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:58,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:58,787 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-06 18:39:58,787 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439772272] [2019-11-06 18:39:58,787 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2069252694] [2019-11-06 18:39:58,787 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:39:58,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:58,892 INFO L256 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-06 18:39:58,893 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:39:59,085 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-06 18:39:59,086 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:39:59,086 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2019-11-06 18:39:59,086 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229247801] [2019-11-06 18:39:59,086 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-06 18:39:59,087 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:39:59,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-06 18:39:59,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2019-11-06 18:39:59,087 INFO L87 Difference]: Start difference. First operand 134 states and 176 transitions. Second operand 16 states. [2019-11-06 18:40:00,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:40:00,740 INFO L93 Difference]: Finished difference Result 355 states and 487 transitions. [2019-11-06 18:40:00,740 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-11-06 18:40:00,741 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 42 [2019-11-06 18:40:00,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:40:00,743 INFO L225 Difference]: With dead ends: 355 [2019-11-06 18:40:00,743 INFO L226 Difference]: Without dead ends: 306 [2019-11-06 18:40:00,744 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=167, Invalid=703, Unknown=0, NotChecked=0, Total=870 [2019-11-06 18:40:00,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2019-11-06 18:40:00,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 177. [2019-11-06 18:40:00,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2019-11-06 18:40:00,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 236 transitions. [2019-11-06 18:40:00,767 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 236 transitions. Word has length 42 [2019-11-06 18:40:00,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:40:00,767 INFO L462 AbstractCegarLoop]: Abstraction has 177 states and 236 transitions. [2019-11-06 18:40:00,767 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-06 18:40:00,767 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 236 transitions. [2019-11-06 18:40:00,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-11-06 18:40:00,769 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:40:00,769 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:40:00,972 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:40:00,973 INFO L410 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:40:00,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:40:00,974 INFO L82 PathProgramCache]: Analyzing trace with hash -1289215891, now seen corresponding path program 2 times [2019-11-06 18:40:00,974 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:40:00,975 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277758571] [2019-11-06 18:40:00,975 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:40:00,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:01,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:01,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:01,099 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-06 18:40:01,099 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277758571] [2019-11-06 18:40:01,100 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [9542257] [2019-11-06 18:40:01,100 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:40:01,229 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 18:40:01,229 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:40:01,230 INFO L256 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-06 18:40:01,237 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:40:01,358 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-06 18:40:01,358 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:40:01,358 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2019-11-06 18:40:01,359 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593926268] [2019-11-06 18:40:01,359 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-06 18:40:01,359 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:40:01,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-06 18:40:01,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2019-11-06 18:40:01,360 INFO L87 Difference]: Start difference. First operand 177 states and 236 transitions. Second operand 16 states. [2019-11-06 18:40:02,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:40:02,034 INFO L93 Difference]: Finished difference Result 244 states and 323 transitions. [2019-11-06 18:40:02,035 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-11-06 18:40:02,035 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 43 [2019-11-06 18:40:02,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:40:02,037 INFO L225 Difference]: With dead ends: 244 [2019-11-06 18:40:02,037 INFO L226 Difference]: Without dead ends: 214 [2019-11-06 18:40:02,038 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2019-11-06 18:40:02,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2019-11-06 18:40:02,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 184. [2019-11-06 18:40:02,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2019-11-06 18:40:02,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 245 transitions. [2019-11-06 18:40:02,060 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 245 transitions. Word has length 43 [2019-11-06 18:40:02,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:40:02,060 INFO L462 AbstractCegarLoop]: Abstraction has 184 states and 245 transitions. [2019-11-06 18:40:02,060 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-06 18:40:02,061 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 245 transitions. [2019-11-06 18:40:02,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-11-06 18:40:02,062 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:40:02,062 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:40:02,263 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:40:02,263 INFO L410 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:40:02,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:40:02,264 INFO L82 PathProgramCache]: Analyzing trace with hash 397852258, now seen corresponding path program 1 times [2019-11-06 18:40:02,264 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:40:02,264 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864911400] [2019-11-06 18:40:02,265 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:40:02,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:02,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:02,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:03,000 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-06 18:40:03,000 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864911400] [2019-11-06 18:40:03,001 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281295109] [2019-11-06 18:40:03,001 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:40:03,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:03,123 INFO L256 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 50 conjunts are in the unsatisfiable core [2019-11-06 18:40:03,124 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:40:03,144 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2019-11-06 18:40:03,145 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 18:40:03,148 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:40:03,149 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-06 18:40:03,149 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:1 [2019-11-06 18:40:03,468 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:40:03,469 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 25 [2019-11-06 18:40:03,470 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 18:40:03,487 INFO L567 ElimStorePlain]: treesize reduction 4, result has 78.9 percent of original size [2019-11-06 18:40:03,490 INFO L496 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-06 18:40:03,490 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:31, output treesize:4 [2019-11-06 18:40:03,517 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-06 18:40:03,518 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:40:03,518 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14] total 29 [2019-11-06 18:40:03,518 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224883759] [2019-11-06 18:40:03,519 INFO L442 AbstractCegarLoop]: Interpolant automaton has 29 states [2019-11-06 18:40:03,519 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:40:03,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2019-11-06 18:40:03,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=727, Unknown=0, NotChecked=0, Total=812 [2019-11-06 18:40:03,520 INFO L87 Difference]: Start difference. First operand 184 states and 245 transitions. Second operand 29 states. [2019-11-06 18:40:04,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:40:04,665 INFO L93 Difference]: Finished difference Result 337 states and 450 transitions. [2019-11-06 18:40:04,666 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-06 18:40:04,666 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 43 [2019-11-06 18:40:04,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:40:04,668 INFO L225 Difference]: With dead ends: 337 [2019-11-06 18:40:04,668 INFO L226 Difference]: Without dead ends: 235 [2019-11-06 18:40:04,669 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 263 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=154, Invalid=1178, Unknown=0, NotChecked=0, Total=1332 [2019-11-06 18:40:04,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2019-11-06 18:40:04,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 202. [2019-11-06 18:40:04,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202 states. [2019-11-06 18:40:04,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 265 transitions. [2019-11-06 18:40:04,703 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 265 transitions. Word has length 43 [2019-11-06 18:40:04,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:40:04,703 INFO L462 AbstractCegarLoop]: Abstraction has 202 states and 265 transitions. [2019-11-06 18:40:04,703 INFO L463 AbstractCegarLoop]: Interpolant automaton has 29 states. [2019-11-06 18:40:04,703 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 265 transitions. [2019-11-06 18:40:04,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-11-06 18:40:04,705 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:40:04,705 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:40:04,909 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:40:04,909 INFO L410 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:40:04,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:40:04,909 INFO L82 PathProgramCache]: Analyzing trace with hash 1360175746, now seen corresponding path program 1 times [2019-11-06 18:40:04,910 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:40:04,910 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087739161] [2019-11-06 18:40:04,910 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:40:04,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:05,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:05,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:05,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:05,018 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-06 18:40:05,019 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087739161] [2019-11-06 18:40:05,019 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570914782] [2019-11-06 18:40:05,019 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:40:05,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:05,131 INFO L256 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-06 18:40:05,131 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:40:05,214 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-06 18:40:05,215 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:40:05,215 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2019-11-06 18:40:05,215 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796656605] [2019-11-06 18:40:05,216 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-06 18:40:05,216 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:40:05,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-06 18:40:05,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2019-11-06 18:40:05,217 INFO L87 Difference]: Start difference. First operand 202 states and 265 transitions. Second operand 13 states.