/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/seq-pthread/cs_lamport.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 22:21:32,898 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 22:21:32,901 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 22:21:32,918 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-06 22:21:32,919 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-06 22:21:32,921 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-06 22:21:32,923 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-06 22:21:32,932 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-06 22:21:32,936 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-06 22:21:32,939 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-06 22:21:32,941 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-06 22:21:32,942 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-06 22:21:32,943 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 22:21:32,944 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 22:21:32,946 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 22:21:32,948 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 22:21:32,949 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 22:21:32,950 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 22:21:32,951 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 22:21:32,955 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 22:21:32,959 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 22:21:32,962 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 22:21:32,964 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 22:21:32,965 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 22:21:32,966 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-06 22:21:32,967 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-06 22:21:32,967 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-06 22:21:32,968 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-06 22:21:32,969 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-06 22:21:32,970 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-06 22:21:32,970 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-06 22:21:32,972 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-06 22:21:32,973 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-06 22:21:32,973 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-06 22:21:32,974 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-06 22:21:32,975 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-06 22:21:32,975 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-06 22:21:32,975 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-06 22:21:32,976 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 22:21:32,976 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 22:21:32,977 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 22:21:32,978 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 22:21:33,012 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 22:21:33,012 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 22:21:33,013 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 22:21:33,014 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 22:21:33,014 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 22:21:33,014 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 22:21:33,014 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 22:21:33,014 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 22:21:33,015 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 22:21:33,018 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 22:21:33,018 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 22:21:33,018 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 22:21:33,018 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 22:21:33,019 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 22:21:33,019 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 22:21:33,019 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 22:21:33,019 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 22:21:33,020 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 22:21:33,021 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 22:21:33,021 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 22:21:33,021 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 22:21:33,021 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 22:21:33,022 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 22:21:33,022 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 22:21:33,022 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 22:21:33,022 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 22:21:33,022 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 22:21:33,023 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 22:21:33,023 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 22:21:33,300 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 22:21:33,322 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 22:21:33,326 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 22:21:33,327 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 22:21:33,328 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 22:21:33,328 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-pthread/cs_lamport.i [2019-11-06 22:21:33,397 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cf009064f/1378cdbad67842eaa97f08cafb8c5979/FLAGef61eb56b [2019-11-06 22:21:33,945 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 22:21:33,947 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-pthread/cs_lamport.i [2019-11-06 22:21:33,969 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cf009064f/1378cdbad67842eaa97f08cafb8c5979/FLAGef61eb56b [2019-11-06 22:21:34,242 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cf009064f/1378cdbad67842eaa97f08cafb8c5979 [2019-11-06 22:21:34,252 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 22:21:34,253 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 22:21:34,254 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 22:21:34,254 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 22:21:34,257 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 22:21:34,258 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:21:34" (1/1) ... [2019-11-06 22:21:34,261 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@73f8105c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:21:34, skipping insertion in model container [2019-11-06 22:21:34,261 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:21:34" (1/1) ... [2019-11-06 22:21:34,268 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 22:21:34,333 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 22:21:34,930 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:21:34,945 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 22:21:35,034 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:21:35,115 INFO L192 MainTranslator]: Completed translation [2019-11-06 22:21:35,116 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:21:35 WrapperNode [2019-11-06 22:21:35,116 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 22:21:35,117 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 22:21:35,117 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 22:21:35,117 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 22:21:35,130 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:21:35" (1/1) ... [2019-11-06 22:21:35,130 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:21:35" (1/1) ... [2019-11-06 22:21:35,175 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:21:35" (1/1) ... [2019-11-06 22:21:35,176 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:21:35" (1/1) ... [2019-11-06 22:21:35,229 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:21:35" (1/1) ... [2019-11-06 22:21:35,241 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:21:35" (1/1) ... [2019-11-06 22:21:35,250 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:21:35" (1/1) ... [2019-11-06 22:21:35,263 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 22:21:35,263 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 22:21:35,263 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 22:21:35,264 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 22:21:35,264 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:21:35" (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 22:21:35,329 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 22:21:35,329 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 22:21:35,329 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~$Pointer$ [2019-11-06 22:21:35,329 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2019-11-06 22:21:35,330 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2019-11-06 22:21:35,330 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2019-11-06 22:21:35,330 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2019-11-06 22:21:35,330 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2019-11-06 22:21:35,330 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-11-06 22:21:35,331 INFO L138 BoogieDeclarations]: Found implementation of procedure __CS_cs [2019-11-06 22:21:35,331 INFO L138 BoogieDeclarations]: Found implementation of procedure __CS_pthread_mutex_init [2019-11-06 22:21:35,331 INFO L138 BoogieDeclarations]: Found implementation of procedure __CS_pthread_mutex_destroy [2019-11-06 22:21:35,331 INFO L138 BoogieDeclarations]: Found implementation of procedure __CS_pthread_mutex_lock [2019-11-06 22:21:35,331 INFO L138 BoogieDeclarations]: Found implementation of procedure __CS_pthread_mutex_unlock [2019-11-06 22:21:35,332 INFO L138 BoogieDeclarations]: Found implementation of procedure __CS_pthread_cond_init [2019-11-06 22:21:35,332 INFO L138 BoogieDeclarations]: Found implementation of procedure __CS_pthread_cond_signal [2019-11-06 22:21:35,332 INFO L138 BoogieDeclarations]: Found implementation of procedure __CS_pthread_cond_broadcast [2019-11-06 22:21:35,332 INFO L138 BoogieDeclarations]: Found implementation of procedure __CS_pthread_cond_wait [2019-11-06 22:21:35,333 INFO L138 BoogieDeclarations]: Found implementation of procedure __CS_assert [2019-11-06 22:21:35,333 INFO L138 BoogieDeclarations]: Found implementation of procedure __CS_assume [2019-11-06 22:21:35,333 INFO L138 BoogieDeclarations]: Found implementation of procedure __CS_pthread_join [2019-11-06 22:21:35,333 INFO L138 BoogieDeclarations]: Found implementation of procedure __CS_pthread_create [2019-11-06 22:21:35,333 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2019-11-06 22:21:35,333 INFO L138 BoogieDeclarations]: Found implementation of procedure thr2 [2019-11-06 22:21:35,334 INFO L138 BoogieDeclarations]: Found implementation of procedure main_thread [2019-11-06 22:21:35,334 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 22:21:35,334 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 22:21:35,334 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_pointer [2019-11-06 22:21:35,334 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2019-11-06 22:21:35,335 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-11-06 22:21:35,335 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 22:21:35,335 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2019-11-06 22:21:35,335 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2019-11-06 22:21:35,335 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2019-11-06 22:21:35,336 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2019-11-06 22:21:35,336 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2019-11-06 22:21:35,336 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2019-11-06 22:21:35,336 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2019-11-06 22:21:35,336 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2019-11-06 22:21:35,336 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2019-11-06 22:21:35,337 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2019-11-06 22:21:35,337 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2019-11-06 22:21:35,337 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2019-11-06 22:21:35,337 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2019-11-06 22:21:35,337 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2019-11-06 22:21:35,337 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2019-11-06 22:21:35,338 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2019-11-06 22:21:35,338 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2019-11-06 22:21:35,338 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2019-11-06 22:21:35,338 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2019-11-06 22:21:35,338 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2019-11-06 22:21:35,339 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2019-11-06 22:21:35,339 INFO L130 BoogieDeclarations]: Found specification of procedure select [2019-11-06 22:21:35,339 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2019-11-06 22:21:35,339 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2019-11-06 22:21:35,339 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2019-11-06 22:21:35,339 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2019-11-06 22:21:35,340 INFO L130 BoogieDeclarations]: Found specification of procedure random [2019-11-06 22:21:35,340 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2019-11-06 22:21:35,340 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2019-11-06 22:21:35,340 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2019-11-06 22:21:35,340 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2019-11-06 22:21:35,340 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2019-11-06 22:21:35,341 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2019-11-06 22:21:35,341 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2019-11-06 22:21:35,341 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2019-11-06 22:21:35,341 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2019-11-06 22:21:35,341 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2019-11-06 22:21:35,342 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2019-11-06 22:21:35,342 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2019-11-06 22:21:35,342 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2019-11-06 22:21:35,342 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2019-11-06 22:21:35,343 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2019-11-06 22:21:35,343 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2019-11-06 22:21:35,343 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2019-11-06 22:21:35,343 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2019-11-06 22:21:35,343 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2019-11-06 22:21:35,344 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2019-11-06 22:21:35,344 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2019-11-06 22:21:35,344 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2019-11-06 22:21:35,344 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2019-11-06 22:21:35,344 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2019-11-06 22:21:35,345 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2019-11-06 22:21:35,345 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2019-11-06 22:21:35,345 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2019-11-06 22:21:35,345 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2019-11-06 22:21:35,345 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-11-06 22:21:35,346 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2019-11-06 22:21:35,346 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2019-11-06 22:21:35,346 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-11-06 22:21:35,346 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2019-11-06 22:21:35,346 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2019-11-06 22:21:35,348 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2019-11-06 22:21:35,348 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2019-11-06 22:21:35,348 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2019-11-06 22:21:35,349 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2019-11-06 22:21:35,349 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2019-11-06 22:21:35,349 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2019-11-06 22:21:35,349 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 22:21:35,349 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2019-11-06 22:21:35,350 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2019-11-06 22:21:35,350 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2019-11-06 22:21:35,350 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2019-11-06 22:21:35,350 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2019-11-06 22:21:35,350 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2019-11-06 22:21:35,350 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2019-11-06 22:21:35,351 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2019-11-06 22:21:35,351 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2019-11-06 22:21:35,351 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2019-11-06 22:21:35,351 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2019-11-06 22:21:35,351 INFO L130 BoogieDeclarations]: Found specification of procedure system [2019-11-06 22:21:35,352 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2019-11-06 22:21:35,352 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2019-11-06 22:21:35,352 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2019-11-06 22:21:35,352 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2019-11-06 22:21:35,353 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2019-11-06 22:21:35,353 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2019-11-06 22:21:35,353 INFO L130 BoogieDeclarations]: Found specification of procedure div [2019-11-06 22:21:35,353 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2019-11-06 22:21:35,353 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2019-11-06 22:21:35,354 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2019-11-06 22:21:35,354 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2019-11-06 22:21:35,354 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2019-11-06 22:21:35,355 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2019-11-06 22:21:35,355 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2019-11-06 22:21:35,355 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2019-11-06 22:21:35,355 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2019-11-06 22:21:35,355 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2019-11-06 22:21:35,355 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2019-11-06 22:21:35,356 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2019-11-06 22:21:35,356 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2019-11-06 22:21:35,356 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2019-11-06 22:21:35,356 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2019-11-06 22:21:35,356 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2019-11-06 22:21:35,357 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2019-11-06 22:21:35,357 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2019-11-06 22:21:35,357 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2019-11-06 22:21:35,357 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2019-11-06 22:21:35,358 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2019-11-06 22:21:35,358 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2019-11-06 22:21:35,361 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2019-11-06 22:21:35,361 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-11-06 22:21:35,364 INFO L130 BoogieDeclarations]: Found specification of procedure __CS_cs [2019-11-06 22:21:35,365 INFO L130 BoogieDeclarations]: Found specification of procedure __CS_pthread_mutex_init [2019-11-06 22:21:35,370 INFO L130 BoogieDeclarations]: Found specification of procedure __CS_pthread_mutex_destroy [2019-11-06 22:21:35,371 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-06 22:21:35,371 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-06 22:21:35,371 INFO L130 BoogieDeclarations]: Found specification of procedure __CS_pthread_mutex_lock [2019-11-06 22:21:35,371 INFO L130 BoogieDeclarations]: Found specification of procedure __CS_pthread_mutex_unlock [2019-11-06 22:21:35,371 INFO L130 BoogieDeclarations]: Found specification of procedure __CS_pthread_cond_init [2019-11-06 22:21:35,371 INFO L130 BoogieDeclarations]: Found specification of procedure __CS_pthread_cond_signal [2019-11-06 22:21:35,372 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-11-06 22:21:35,372 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-11-06 22:21:35,373 INFO L130 BoogieDeclarations]: Found specification of procedure __CS_pthread_cond_broadcast [2019-11-06 22:21:35,373 INFO L130 BoogieDeclarations]: Found specification of procedure __CS_pthread_cond_wait [2019-11-06 22:21:35,373 INFO L130 BoogieDeclarations]: Found specification of procedure __CS_assert [2019-11-06 22:21:35,373 INFO L130 BoogieDeclarations]: Found specification of procedure __CS_assume [2019-11-06 22:21:35,373 INFO L130 BoogieDeclarations]: Found specification of procedure __CS_pthread_join [2019-11-06 22:21:35,373 INFO L130 BoogieDeclarations]: Found specification of procedure __CS_pthread_create [2019-11-06 22:21:35,374 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2019-11-06 22:21:35,374 INFO L130 BoogieDeclarations]: Found specification of procedure thr2 [2019-11-06 22:21:35,374 INFO L130 BoogieDeclarations]: Found specification of procedure main_thread [2019-11-06 22:21:35,374 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-06 22:21:35,374 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-11-06 22:21:35,374 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-06 22:21:35,374 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 22:21:35,375 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~$Pointer$ [2019-11-06 22:21:35,375 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 22:21:35,375 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2019-11-06 22:21:35,375 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 22:21:36,247 INFO L688 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##93: assume !(0 != ~__CS_ret~0 % 256); [2019-11-06 22:21:36,248 INFO L688 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##92: assume 0 != ~__CS_ret~0 % 256;#res.base, #res.offset := 0, 0; [2019-11-06 22:21:36,248 INFO L688 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##83: assume !(0 != ~__CS_ret~0 % 256); [2019-11-06 22:21:36,248 INFO L688 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##82: assume 0 != ~__CS_ret~0 % 256;#res.base, #res.offset := 0, 0; [2019-11-06 22:21:36,249 INFO L688 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##75: assume !(0 != ~__CS_ret~0 % 256); [2019-11-06 22:21:36,249 INFO L688 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##74: assume 0 != ~__CS_ret~0 % 256;#res.base, #res.offset := 0, 0; [2019-11-06 22:21:36,249 INFO L688 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##34: assume !(0 != ~__CS_ret~0 % 256); [2019-11-06 22:21:36,249 INFO L688 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##33: assume 0 != ~__CS_ret~0 % 256;#res.base, #res.offset := 0, 0; [2019-11-06 22:21:36,426 INFO L688 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##93: assume !(0 != ~__CS_ret~0 % 256); [2019-11-06 22:21:36,427 INFO L688 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##92: assume 0 != ~__CS_ret~0 % 256;#res.base, #res.offset := 0, 0; [2019-11-06 22:21:36,427 INFO L688 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##83: assume !(0 != ~__CS_ret~0 % 256); [2019-11-06 22:21:36,427 INFO L688 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##82: assume 0 != ~__CS_ret~0 % 256;#res.base, #res.offset := 0, 0; [2019-11-06 22:21:36,427 INFO L688 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##75: assume !(0 != ~__CS_ret~0 % 256); [2019-11-06 22:21:36,427 INFO L688 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##74: assume 0 != ~__CS_ret~0 % 256;#res.base, #res.offset := 0, 0; [2019-11-06 22:21:36,427 INFO L688 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##34: assume !(0 != ~__CS_ret~0 % 256); [2019-11-06 22:21:36,428 INFO L688 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##33: assume 0 != ~__CS_ret~0 % 256;#res.base, #res.offset := 0, 0; [2019-11-06 22:21:38,997 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 22:21:38,997 INFO L284 CfgBuilder]: Removed 12 assume(true) statements. [2019-11-06 22:21:38,999 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:21:38 BoogieIcfgContainer [2019-11-06 22:21:38,999 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 22:21:39,003 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 22:21:39,003 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 22:21:39,007 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 22:21:39,007 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:21:34" (1/3) ... [2019-11-06 22:21:39,008 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74fd5b60 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:21:39, skipping insertion in model container [2019-11-06 22:21:39,008 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:21:35" (2/3) ... [2019-11-06 22:21:39,009 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74fd5b60 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:21:39, skipping insertion in model container [2019-11-06 22:21:39,009 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:21:38" (3/3) ... [2019-11-06 22:21:39,011 INFO L109 eAbstractionObserver]: Analyzing ICFG cs_lamport.i [2019-11-06 22:21:39,023 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 22:21:39,040 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 22:21:39,055 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 22:21:39,089 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 22:21:39,089 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 22:21:39,090 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 22:21:39,090 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 22:21:39,090 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 22:21:39,090 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 22:21:39,090 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 22:21:39,090 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 22:21:39,118 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states. [2019-11-06 22:21:39,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-11-06 22:21:39,126 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:21:39,127 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:21:39,130 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:21:39,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:21:39,136 INFO L82 PathProgramCache]: Analyzing trace with hash 726859242, now seen corresponding path program 1 times [2019-11-06 22:21:39,145 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:21:39,145 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040640892] [2019-11-06 22:21:39,146 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:21:39,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:21:39,844 WARN L191 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2019-11-06 22:21:39,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:21:39,899 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 22:21:39,899 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040640892] [2019-11-06 22:21:39,900 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:21:39,900 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 22:21:39,901 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337137782] [2019-11-06 22:21:39,909 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 22:21:39,910 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:21:39,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 22:21:39,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:21:39,927 INFO L87 Difference]: Start difference. First operand 224 states. Second operand 4 states. [2019-11-06 22:21:42,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:21:42,501 INFO L93 Difference]: Finished difference Result 162 states and 227 transitions. [2019-11-06 22:21:42,502 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 22:21:42,503 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2019-11-06 22:21:42,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:21:42,524 INFO L225 Difference]: With dead ends: 162 [2019-11-06 22:21:42,525 INFO L226 Difference]: Without dead ends: 81 [2019-11-06 22:21:42,531 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:21:42,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2019-11-06 22:21:42,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 74. [2019-11-06 22:21:42,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2019-11-06 22:21:42,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 100 transitions. [2019-11-06 22:21:42,617 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 100 transitions. Word has length 18 [2019-11-06 22:21:42,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:21:42,618 INFO L462 AbstractCegarLoop]: Abstraction has 74 states and 100 transitions. [2019-11-06 22:21:42,618 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 22:21:42,618 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 100 transitions. [2019-11-06 22:21:42,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-06 22:21:42,629 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:21:42,630 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 22:21:42,630 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:21:42,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:21:42,630 INFO L82 PathProgramCache]: Analyzing trace with hash 843535469, now seen corresponding path program 1 times [2019-11-06 22:21:42,631 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:21:42,638 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645443883] [2019-11-06 22:21:42,638 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:21:42,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:21:42,906 WARN L191 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2019-11-06 22:21:42,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:21:42,926 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 22:21:42,927 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645443883] [2019-11-06 22:21:42,927 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:21:42,927 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 22:21:42,928 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917091261] [2019-11-06 22:21:42,929 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 22:21:42,929 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:21:42,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 22:21:42,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:21:42,930 INFO L87 Difference]: Start difference. First operand 74 states and 100 transitions. Second operand 4 states. [2019-11-06 22:21:45,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:21:45,384 INFO L93 Difference]: Finished difference Result 147 states and 202 transitions. [2019-11-06 22:21:45,386 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 22:21:45,386 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2019-11-06 22:21:45,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:21:45,388 INFO L225 Difference]: With dead ends: 147 [2019-11-06 22:21:45,388 INFO L226 Difference]: Without dead ends: 80 [2019-11-06 22:21:45,390 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:21:45,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2019-11-06 22:21:45,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 75. [2019-11-06 22:21:45,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2019-11-06 22:21:45,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 101 transitions. [2019-11-06 22:21:45,404 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 101 transitions. Word has length 21 [2019-11-06 22:21:45,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:21:45,404 INFO L462 AbstractCegarLoop]: Abstraction has 75 states and 101 transitions. [2019-11-06 22:21:45,404 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 22:21:45,404 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 101 transitions. [2019-11-06 22:21:45,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-11-06 22:21:45,405 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:21:45,405 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 22:21:45,406 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:21:45,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:21:45,406 INFO L82 PathProgramCache]: Analyzing trace with hash -690091377, now seen corresponding path program 1 times [2019-11-06 22:21:45,406 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:21:45,407 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628064847] [2019-11-06 22:21:45,407 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:21:45,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:21:45,835 WARN L191 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2019-11-06 22:21:45,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:21:45,860 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-06 22:21:45,861 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628064847] [2019-11-06 22:21:45,861 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:21:45,861 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-06 22:21:45,861 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715437121] [2019-11-06 22:21:45,862 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:21:45,862 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:21:45,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:21:45,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:21:45,863 INFO L87 Difference]: Start difference. First operand 75 states and 101 transitions. Second operand 6 states. [2019-11-06 22:21:46,036 WARN L191 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 120 [2019-11-06 22:21:48,367 WARN L191 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2019-11-06 22:21:48,506 WARN L191 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 126 [2019-11-06 22:21:49,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:21:49,072 INFO L93 Difference]: Finished difference Result 143 states and 201 transitions. [2019-11-06 22:21:49,072 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:21:49,073 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 23 [2019-11-06 22:21:49,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:21:49,076 INFO L225 Difference]: With dead ends: 143 [2019-11-06 22:21:49,076 INFO L226 Difference]: Without dead ends: 135 [2019-11-06 22:21:49,077 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-11-06 22:21:49,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2019-11-06 22:21:49,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 129. [2019-11-06 22:21:49,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2019-11-06 22:21:49,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 182 transitions. [2019-11-06 22:21:49,101 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 182 transitions. Word has length 23 [2019-11-06 22:21:49,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:21:49,102 INFO L462 AbstractCegarLoop]: Abstraction has 129 states and 182 transitions. [2019-11-06 22:21:49,102 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:21:49,102 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 182 transitions. [2019-11-06 22:21:49,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2019-11-06 22:21:49,105 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:21:49,105 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:21:49,106 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:21:49,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:21:49,106 INFO L82 PathProgramCache]: Analyzing trace with hash 1065445629, now seen corresponding path program 1 times [2019-11-06 22:21:49,106 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:21:49,107 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016071608] [2019-11-06 22:21:49,107 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:21:49,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:21:49,615 WARN L191 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2019-11-06 22:21:49,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:21:49,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:21:49,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:21:49,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:21:49,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:21:49,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:21:49,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:21:50,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:21:50,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:21:50,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:21:50,197 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-11-06 22:21:50,198 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016071608] [2019-11-06 22:21:50,198 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1594514318] [2019-11-06 22:21:50,198 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 22:21:50,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:21:50,520 INFO L256 TraceCheckSpWp]: Trace formula consists of 913 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-06 22:21:50,536 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:21:50,614 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-11-06 22:21:50,614 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:21:50,614 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 4] total 22 [2019-11-06 22:21:50,615 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957080501] [2019-11-06 22:21:50,616 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-11-06 22:21:50,616 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:21:50,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-11-06 22:21:50,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2019-11-06 22:21:50,617 INFO L87 Difference]: Start difference. First operand 129 states and 182 transitions. Second operand 22 states. [2019-11-06 22:21:50,775 WARN L191 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-11-06 22:21:51,068 WARN L191 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2019-11-06 22:22:06,048 WARN L191 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 135 [2019-11-06 22:22:06,529 WARN L191 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2019-11-06 22:22:06,740 WARN L191 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2019-11-06 22:22:07,186 WARN L191 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2019-11-06 22:22:07,859 WARN L191 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2019-11-06 22:22:08,264 WARN L191 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2019-11-06 22:22:08,891 WARN L191 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2019-11-06 22:22:09,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:22:09,437 INFO L93 Difference]: Finished difference Result 414 states and 627 transitions. [2019-11-06 22:22:09,437 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2019-11-06 22:22:09,437 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 80 [2019-11-06 22:22:09,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:22:09,442 INFO L225 Difference]: With dead ends: 414 [2019-11-06 22:22:09,442 INFO L226 Difference]: Without dead ends: 292 [2019-11-06 22:22:09,446 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 634 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=415, Invalid=2665, Unknown=0, NotChecked=0, Total=3080 [2019-11-06 22:22:09,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2019-11-06 22:22:09,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 264. [2019-11-06 22:22:09,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 264 states. [2019-11-06 22:22:09,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 388 transitions. [2019-11-06 22:22:09,497 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 388 transitions. Word has length 80 [2019-11-06 22:22:09,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:22:09,497 INFO L462 AbstractCegarLoop]: Abstraction has 264 states and 388 transitions. [2019-11-06 22:22:09,497 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-11-06 22:22:09,497 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 388 transitions. [2019-11-06 22:22:09,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2019-11-06 22:22:09,501 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:22:09,501 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:22:09,716 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:22:09,717 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:22:09,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:22:09,718 INFO L82 PathProgramCache]: Analyzing trace with hash -1010069604, now seen corresponding path program 1 times [2019-11-06 22:22:09,718 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:22:09,719 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765261994] [2019-11-06 22:22:09,719 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:22:09,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:22:10,111 WARN L191 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2019-11-06 22:22:10,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:22:10,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:22:10,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:22:10,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:22:10,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:22:10,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:22:10,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:22:10,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:22:10,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:22:10,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:22:10,868 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-11-06 22:22:10,869 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765261994] [2019-11-06 22:22:10,870 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [587796331] [2019-11-06 22:22:10,870 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 22:22:11,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:22:11,146 INFO L256 TraceCheckSpWp]: Trace formula consists of 930 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 22:22:11,152 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:22:11,245 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-11-06 22:22:11,246 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:22:11,246 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 5] total 23 [2019-11-06 22:22:11,246 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270161480] [2019-11-06 22:22:11,247 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-11-06 22:22:11,247 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:22:11,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-11-06 22:22:11,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=449, Unknown=0, NotChecked=0, Total=506 [2019-11-06 22:22:11,248 INFO L87 Difference]: Start difference. First operand 264 states and 388 transitions. Second operand 23 states. [2019-11-06 22:22:11,421 WARN L191 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-11-06 22:22:11,681 WARN L191 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 129