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_dekker.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 23:48:55,379 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 23:48:55,381 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 23:48:55,399 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 23:48:55,399 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 23:48:55,401 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 23:48:55,403 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 23:48:55,412 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 23:48:55,414 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 23:48:55,414 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 23:48:55,415 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 23:48:55,416 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 23:48:55,417 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 23:48:55,418 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 23:48:55,418 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 23:48:55,419 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 23:48:55,420 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 23:48:55,421 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 23:48:55,423 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 23:48:55,424 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 23:48:55,426 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 23:48:55,427 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 23:48:55,428 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 23:48:55,428 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 23:48:55,431 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-14 23:48:55,431 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-14 23:48:55,431 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-14 23:48:55,432 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-14 23:48:55,432 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-14 23:48:55,433 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-14 23:48:55,433 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 23:48:55,434 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 23:48:55,435 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 23:48:55,435 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 23:48:55,436 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 23:48:55,437 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 23:48:55,437 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 23:48:55,437 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 23:48:55,438 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 23:48:55,439 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 23:48:55,439 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 23:48:55,440 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 [2019-10-14 23:48:55,453 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 23:48:55,454 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 23:48:55,455 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 23:48:55,455 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 23:48:55,455 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 23:48:55,455 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 23:48:55,456 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 23:48:55,456 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 23:48:55,456 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 23:48:55,456 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 23:48:55,456 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 23:48:55,457 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 23:48:55,457 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 23:48:55,457 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 23:48:55,457 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 23:48:55,457 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 23:48:55,458 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 23:48:55,458 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 23:48:55,458 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 23:48:55,458 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 23:48:55,458 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 23:48:55,459 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 23:48:55,459 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 23:48:55,459 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 23:48:55,459 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 23:48:55,459 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 23:48:55,460 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 23:48:55,460 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 23:48:55,460 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 23:48:55,735 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 23:48:55,747 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 23:48:55,751 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 23:48:55,752 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 23:48:55,752 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 23:48:55,753 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-pthread/cs_dekker.i [2019-10-14 23:48:55,823 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/41ec9ea1f/91d5e43f4a0847d8a2e75a34ea5f8731/FLAGc8439bb03 [2019-10-14 23:48:56,390 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 23:48:56,392 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-pthread/cs_dekker.i [2019-10-14 23:48:56,413 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/41ec9ea1f/91d5e43f4a0847d8a2e75a34ea5f8731/FLAGc8439bb03 [2019-10-14 23:48:56,729 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/41ec9ea1f/91d5e43f4a0847d8a2e75a34ea5f8731 [2019-10-14 23:48:56,738 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 23:48:56,740 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 23:48:56,741 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 23:48:56,741 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 23:48:56,745 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 23:48:56,746 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:48:56" (1/1) ... [2019-10-14 23:48:56,749 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7e20f8f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:48:56, skipping insertion in model container [2019-10-14 23:48:56,749 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:48:56" (1/1) ... [2019-10-14 23:48:56,757 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 23:48:56,808 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 23:48:57,412 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:48:57,435 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 23:48:57,554 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:48:57,661 INFO L192 MainTranslator]: Completed translation [2019-10-14 23:48:57,662 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:48:57 WrapperNode [2019-10-14 23:48:57,662 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 23:48:57,663 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 23:48:57,663 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 23:48:57,663 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 23:48:57,678 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:48:57" (1/1) ... [2019-10-14 23:48:57,678 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:48:57" (1/1) ... [2019-10-14 23:48:57,733 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:48:57" (1/1) ... [2019-10-14 23:48:57,733 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:48:57" (1/1) ... [2019-10-14 23:48:57,812 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:48:57" (1/1) ... [2019-10-14 23:48:57,823 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:48:57" (1/1) ... [2019-10-14 23:48:57,830 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:48:57" (1/1) ... [2019-10-14 23:48:57,841 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 23:48:57,842 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 23:48:57,842 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 23:48:57,842 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 23:48:57,843 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:48:57" (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 [2019-10-14 23:48:57,916 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 23:48:57,916 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 23:48:57,917 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~$Pointer$ [2019-10-14 23:48:57,917 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2019-10-14 23:48:57,917 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2019-10-14 23:48:57,917 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2019-10-14 23:48:57,917 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2019-10-14 23:48:57,918 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2019-10-14 23:48:57,918 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-14 23:48:57,918 INFO L138 BoogieDeclarations]: Found implementation of procedure __CS_cs [2019-10-14 23:48:57,918 INFO L138 BoogieDeclarations]: Found implementation of procedure __CS_pthread_mutex_init [2019-10-14 23:48:57,919 INFO L138 BoogieDeclarations]: Found implementation of procedure __CS_pthread_mutex_destroy [2019-10-14 23:48:57,919 INFO L138 BoogieDeclarations]: Found implementation of procedure __CS_pthread_mutex_lock [2019-10-14 23:48:57,919 INFO L138 BoogieDeclarations]: Found implementation of procedure __CS_pthread_mutex_unlock [2019-10-14 23:48:57,919 INFO L138 BoogieDeclarations]: Found implementation of procedure __CS_pthread_cond_init [2019-10-14 23:48:57,920 INFO L138 BoogieDeclarations]: Found implementation of procedure __CS_pthread_cond_signal [2019-10-14 23:48:57,920 INFO L138 BoogieDeclarations]: Found implementation of procedure __CS_pthread_cond_broadcast [2019-10-14 23:48:57,920 INFO L138 BoogieDeclarations]: Found implementation of procedure __CS_pthread_cond_wait [2019-10-14 23:48:57,920 INFO L138 BoogieDeclarations]: Found implementation of procedure __CS_assert [2019-10-14 23:48:57,921 INFO L138 BoogieDeclarations]: Found implementation of procedure __CS_assume [2019-10-14 23:48:57,921 INFO L138 BoogieDeclarations]: Found implementation of procedure __CS_pthread_join [2019-10-14 23:48:57,921 INFO L138 BoogieDeclarations]: Found implementation of procedure __CS_pthread_create [2019-10-14 23:48:57,921 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2019-10-14 23:48:57,921 INFO L138 BoogieDeclarations]: Found implementation of procedure thr2 [2019-10-14 23:48:57,922 INFO L138 BoogieDeclarations]: Found implementation of procedure main_thread [2019-10-14 23:48:57,922 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 23:48:57,922 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 23:48:57,922 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_pointer [2019-10-14 23:48:57,923 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2019-10-14 23:48:57,923 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-10-14 23:48:57,923 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 23:48:57,923 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2019-10-14 23:48:57,924 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2019-10-14 23:48:57,924 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2019-10-14 23:48:57,924 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2019-10-14 23:48:57,924 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2019-10-14 23:48:57,924 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2019-10-14 23:48:57,924 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2019-10-14 23:48:57,925 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2019-10-14 23:48:57,925 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2019-10-14 23:48:57,925 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2019-10-14 23:48:57,925 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2019-10-14 23:48:57,925 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2019-10-14 23:48:57,925 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2019-10-14 23:48:57,926 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2019-10-14 23:48:57,926 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2019-10-14 23:48:57,926 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2019-10-14 23:48:57,926 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2019-10-14 23:48:57,926 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2019-10-14 23:48:57,926 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2019-10-14 23:48:57,927 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2019-10-14 23:48:57,927 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2019-10-14 23:48:57,927 INFO L130 BoogieDeclarations]: Found specification of procedure select [2019-10-14 23:48:57,927 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2019-10-14 23:48:57,927 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2019-10-14 23:48:57,928 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2019-10-14 23:48:57,928 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2019-10-14 23:48:57,928 INFO L130 BoogieDeclarations]: Found specification of procedure random [2019-10-14 23:48:57,928 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2019-10-14 23:48:57,928 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2019-10-14 23:48:57,928 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2019-10-14 23:48:57,929 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2019-10-14 23:48:57,929 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2019-10-14 23:48:57,929 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2019-10-14 23:48:57,929 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2019-10-14 23:48:57,929 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2019-10-14 23:48:57,930 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2019-10-14 23:48:57,930 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2019-10-14 23:48:57,930 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2019-10-14 23:48:57,930 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2019-10-14 23:48:57,930 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2019-10-14 23:48:57,930 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2019-10-14 23:48:57,931 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2019-10-14 23:48:57,931 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2019-10-14 23:48:57,931 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2019-10-14 23:48:57,931 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2019-10-14 23:48:57,931 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2019-10-14 23:48:57,932 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2019-10-14 23:48:57,932 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2019-10-14 23:48:57,932 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2019-10-14 23:48:57,932 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2019-10-14 23:48:57,932 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2019-10-14 23:48:57,933 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2019-10-14 23:48:57,933 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2019-10-14 23:48:57,933 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2019-10-14 23:48:57,933 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2019-10-14 23:48:57,933 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-10-14 23:48:57,933 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2019-10-14 23:48:57,934 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2019-10-14 23:48:57,934 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-10-14 23:48:57,934 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2019-10-14 23:48:57,934 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2019-10-14 23:48:57,934 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2019-10-14 23:48:57,935 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2019-10-14 23:48:57,935 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2019-10-14 23:48:57,935 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2019-10-14 23:48:57,935 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2019-10-14 23:48:57,935 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2019-10-14 23:48:57,936 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-14 23:48:57,936 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2019-10-14 23:48:57,936 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2019-10-14 23:48:57,936 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2019-10-14 23:48:57,936 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2019-10-14 23:48:57,936 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2019-10-14 23:48:57,936 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2019-10-14 23:48:57,937 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2019-10-14 23:48:57,937 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2019-10-14 23:48:57,937 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2019-10-14 23:48:57,937 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2019-10-14 23:48:57,937 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2019-10-14 23:48:57,938 INFO L130 BoogieDeclarations]: Found specification of procedure system [2019-10-14 23:48:57,938 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2019-10-14 23:48:57,938 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2019-10-14 23:48:57,938 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2019-10-14 23:48:57,938 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2019-10-14 23:48:57,938 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2019-10-14 23:48:57,939 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2019-10-14 23:48:57,939 INFO L130 BoogieDeclarations]: Found specification of procedure div [2019-10-14 23:48:57,939 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2019-10-14 23:48:57,939 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2019-10-14 23:48:57,939 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2019-10-14 23:48:57,939 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2019-10-14 23:48:57,940 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2019-10-14 23:48:57,940 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2019-10-14 23:48:57,940 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2019-10-14 23:48:57,940 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2019-10-14 23:48:57,940 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2019-10-14 23:48:57,941 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2019-10-14 23:48:57,941 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2019-10-14 23:48:57,941 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2019-10-14 23:48:57,941 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2019-10-14 23:48:57,941 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2019-10-14 23:48:57,941 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2019-10-14 23:48:57,942 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2019-10-14 23:48:57,942 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2019-10-14 23:48:57,942 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2019-10-14 23:48:57,942 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2019-10-14 23:48:57,942 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2019-10-14 23:48:57,942 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2019-10-14 23:48:57,943 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2019-10-14 23:48:57,943 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2019-10-14 23:48:57,943 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-14 23:48:57,943 INFO L130 BoogieDeclarations]: Found specification of procedure __CS_cs [2019-10-14 23:48:57,943 INFO L130 BoogieDeclarations]: Found specification of procedure __CS_pthread_mutex_init [2019-10-14 23:48:57,944 INFO L130 BoogieDeclarations]: Found specification of procedure __CS_pthread_mutex_destroy [2019-10-14 23:48:57,944 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-14 23:48:57,944 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-14 23:48:57,944 INFO L130 BoogieDeclarations]: Found specification of procedure __CS_pthread_mutex_lock [2019-10-14 23:48:57,944 INFO L130 BoogieDeclarations]: Found specification of procedure __CS_pthread_mutex_unlock [2019-10-14 23:48:57,945 INFO L130 BoogieDeclarations]: Found specification of procedure __CS_pthread_cond_init [2019-10-14 23:48:57,945 INFO L130 BoogieDeclarations]: Found specification of procedure __CS_pthread_cond_signal [2019-10-14 23:48:57,945 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-10-14 23:48:57,945 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-10-14 23:48:57,945 INFO L130 BoogieDeclarations]: Found specification of procedure __CS_pthread_cond_broadcast [2019-10-14 23:48:57,945 INFO L130 BoogieDeclarations]: Found specification of procedure __CS_pthread_cond_wait [2019-10-14 23:48:57,946 INFO L130 BoogieDeclarations]: Found specification of procedure __CS_assert [2019-10-14 23:48:57,946 INFO L130 BoogieDeclarations]: Found specification of procedure __CS_assume [2019-10-14 23:48:57,946 INFO L130 BoogieDeclarations]: Found specification of procedure __CS_pthread_join [2019-10-14 23:48:57,946 INFO L130 BoogieDeclarations]: Found specification of procedure __CS_pthread_create [2019-10-14 23:48:57,946 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2019-10-14 23:48:57,946 INFO L130 BoogieDeclarations]: Found specification of procedure thr2 [2019-10-14 23:48:57,947 INFO L130 BoogieDeclarations]: Found specification of procedure main_thread [2019-10-14 23:48:57,947 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-14 23:48:57,947 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-10-14 23:48:57,947 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-14 23:48:57,947 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 23:48:57,947 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~$Pointer$ [2019-10-14 23:48:57,948 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 23:48:57,948 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2019-10-14 23:48:57,948 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 23:48:58,691 INFO L685 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##45: assume !(0 != ~__CS_ret~0 % 256); [2019-10-14 23:48:58,692 INFO L685 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##44: assume 0 != ~__CS_ret~0 % 256;#res.base, #res.offset := 0, 0; [2019-10-14 23:48:58,824 INFO L685 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##45: assume !(0 != ~__CS_ret~0 % 256); [2019-10-14 23:48:58,825 INFO L685 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##44: assume 0 != ~__CS_ret~0 % 256;#res.base, #res.offset := 0, 0; [2019-10-14 23:49:01,394 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 23:49:01,394 INFO L284 CfgBuilder]: Removed 8 assume(true) statements. [2019-10-14 23:49:01,395 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:49:01 BoogieIcfgContainer [2019-10-14 23:49:01,396 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 23:49:01,397 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 23:49:01,397 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 23:49:01,400 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 23:49:01,400 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 11:48:56" (1/3) ... [2019-10-14 23:49:01,401 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a6f2923 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:49:01, skipping insertion in model container [2019-10-14 23:49:01,401 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:48:57" (2/3) ... [2019-10-14 23:49:01,402 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a6f2923 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:49:01, skipping insertion in model container [2019-10-14 23:49:01,402 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:49:01" (3/3) ... [2019-10-14 23:49:01,404 INFO L109 eAbstractionObserver]: Analyzing ICFG cs_dekker.i [2019-10-14 23:49:01,413 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 23:49:01,422 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 23:49:01,430 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 23:49:01,451 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 23:49:01,451 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 23:49:01,451 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 23:49:01,451 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 23:49:01,451 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 23:49:01,452 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 23:49:01,452 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 23:49:01,452 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 23:49:01,475 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states. [2019-10-14 23:49:01,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-10-14 23:49:01,482 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:49:01,483 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:49:01,485 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:49:01,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:49:01,491 INFO L82 PathProgramCache]: Analyzing trace with hash -585036572, now seen corresponding path program 1 times [2019-10-14 23:49:01,500 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:49:01,501 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735195169] [2019-10-14 23:49:01,501 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:49:01,501 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:49:01,501 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:49:01,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:49:01,984 WARN L191 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2019-10-14 23:49:01,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:49:02,038 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:49:02,039 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735195169] [2019-10-14 23:49:02,043 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:49:02,043 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 23:49:02,043 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884299701] [2019-10-14 23:49:02,048 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 23:49:02,049 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:49:02,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 23:49:02,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 23:49:02,066 INFO L87 Difference]: Start difference. First operand 173 states. Second operand 3 states. [2019-10-14 23:49:04,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:49:04,599 INFO L93 Difference]: Finished difference Result 178 states and 247 transitions. [2019-10-14 23:49:04,600 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 23:49:04,602 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2019-10-14 23:49:04,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:49:04,617 INFO L225 Difference]: With dead ends: 178 [2019-10-14 23:49:04,617 INFO L226 Difference]: Without dead ends: 88 [2019-10-14 23:49:04,624 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 23:49:04,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2019-10-14 23:49:04,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 82. [2019-10-14 23:49:04,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2019-10-14 23:49:04,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 112 transitions. [2019-10-14 23:49:04,706 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 112 transitions. Word has length 18 [2019-10-14 23:49:04,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:49:04,706 INFO L462 AbstractCegarLoop]: Abstraction has 82 states and 112 transitions. [2019-10-14 23:49:04,706 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 23:49:04,707 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 112 transitions. [2019-10-14 23:49:04,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-10-14 23:49:04,710 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:49:04,710 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:49:04,711 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:49:04,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:49:04,712 INFO L82 PathProgramCache]: Analyzing trace with hash 1386441782, now seen corresponding path program 1 times [2019-10-14 23:49:04,712 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:49:04,712 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836930627] [2019-10-14 23:49:04,713 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:49:04,713 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:49:04,713 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:49:04,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:49:05,074 WARN L191 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2019-10-14 23:49:05,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:49:05,093 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:49:05,093 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836930627] [2019-10-14 23:49:05,094 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:49:05,094 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 23:49:05,094 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924821701] [2019-10-14 23:49:05,096 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 23:49:05,096 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:49:05,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 23:49:05,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 23:49:05,097 INFO L87 Difference]: Start difference. First operand 82 states and 112 transitions. Second operand 4 states. [2019-10-14 23:49:07,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:49:07,610 INFO L93 Difference]: Finished difference Result 164 states and 226 transitions. [2019-10-14 23:49:07,610 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 23:49:07,610 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2019-10-14 23:49:07,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:49:07,612 INFO L225 Difference]: With dead ends: 164 [2019-10-14 23:49:07,612 INFO L226 Difference]: Without dead ends: 92 [2019-10-14 23:49:07,614 INFO L600 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 [2019-10-14 23:49:07,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2019-10-14 23:49:07,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 83. [2019-10-14 23:49:07,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-10-14 23:49:07,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 113 transitions. [2019-10-14 23:49:07,635 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 113 transitions. Word has length 18 [2019-10-14 23:49:07,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:49:07,636 INFO L462 AbstractCegarLoop]: Abstraction has 83 states and 113 transitions. [2019-10-14 23:49:07,636 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 23:49:07,637 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 113 transitions. [2019-10-14 23:49:07,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-10-14 23:49:07,638 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:49:07,638 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:49:07,638 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:49:07,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:49:07,638 INFO L82 PathProgramCache]: Analyzing trace with hash -590751046, now seen corresponding path program 1 times [2019-10-14 23:49:07,639 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:49:07,639 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837231] [2019-10-14 23:49:07,639 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:49:07,639 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:49:07,639 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:49:07,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:49:07,918 WARN L191 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2019-10-14 23:49:07,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:49:07,933 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:49:07,933 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837231] [2019-10-14 23:49:07,933 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:49:07,934 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 23:49:07,934 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25810770] [2019-10-14 23:49:07,934 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 23:49:07,934 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:49:07,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 23:49:07,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 23:49:07,935 INFO L87 Difference]: Start difference. First operand 83 states and 113 transitions. Second operand 4 states. [2019-10-14 23:49:10,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:49:10,417 INFO L93 Difference]: Finished difference Result 167 states and 230 transitions. [2019-10-14 23:49:10,418 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 23:49:10,418 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2019-10-14 23:49:10,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:49:10,419 INFO L225 Difference]: With dead ends: 167 [2019-10-14 23:49:10,420 INFO L226 Difference]: Without dead ends: 91 [2019-10-14 23:49:10,421 INFO L600 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 [2019-10-14 23:49:10,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2019-10-14 23:49:10,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 84. [2019-10-14 23:49:10,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2019-10-14 23:49:10,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 114 transitions. [2019-10-14 23:49:10,436 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 114 transitions. Word has length 21 [2019-10-14 23:49:10,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:49:10,436 INFO L462 AbstractCegarLoop]: Abstraction has 84 states and 114 transitions. [2019-10-14 23:49:10,436 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 23:49:10,436 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 114 transitions. [2019-10-14 23:49:10,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-10-14 23:49:10,437 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:49:10,437 INFO L380 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] [2019-10-14 23:49:10,437 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:49:10,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:49:10,438 INFO L82 PathProgramCache]: Analyzing trace with hash 701339836, now seen corresponding path program 1 times [2019-10-14 23:49:10,438 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:49:10,438 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677750634] [2019-10-14 23:49:10,438 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:49:10,439 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:49:10,439 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:49:10,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:49:10,741 WARN L191 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2019-10-14 23:49:10,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:49:10,763 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-14 23:49:10,763 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677750634] [2019-10-14 23:49:10,763 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:49:10,763 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-14 23:49:10,764 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915629653] [2019-10-14 23:49:10,764 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 23:49:10,764 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:49:10,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 23:49:10,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-10-14 23:49:10,765 INFO L87 Difference]: Start difference. First operand 84 states and 114 transitions. Second operand 6 states. [2019-10-14 23:49:10,921 WARN L191 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 111 [2019-10-14 23:49:13,214 WARN L191 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 114 [2019-10-14 23:49:13,346 WARN L191 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 117 [2019-10-14 23:49:13,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:49:13,942 INFO L93 Difference]: Finished difference Result 165 states and 231 transitions. [2019-10-14 23:49:13,946 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 23:49:13,946 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 23 [2019-10-14 23:49:13,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:49:13,949 INFO L225 Difference]: With dead ends: 165 [2019-10-14 23:49:13,949 INFO L226 Difference]: Without dead ends: 157 [2019-10-14 23:49:13,949 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-10-14 23:49:13,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2019-10-14 23:49:13,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 147. [2019-10-14 23:49:13,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2019-10-14 23:49:13,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 208 transitions. [2019-10-14 23:49:13,977 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 208 transitions. Word has length 23 [2019-10-14 23:49:13,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:49:13,977 INFO L462 AbstractCegarLoop]: Abstraction has 147 states and 208 transitions. [2019-10-14 23:49:13,977 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-14 23:49:13,977 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 208 transitions. [2019-10-14 23:49:13,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2019-10-14 23:49:13,982 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:49:13,982 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:49:13,982 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:49:13,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:49:13,983 INFO L82 PathProgramCache]: Analyzing trace with hash -93496220, now seen corresponding path program 1 times [2019-10-14 23:49:13,983 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:49:13,983 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082085174] [2019-10-14 23:49:13,983 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:49:13,983 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:49:13,984 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:49:14,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:49:14,334 WARN L191 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2019-10-14 23:49:14,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:49:14,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:49:14,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:49:14,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:49:14,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:49:14,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:49:14,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:49:14,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:49:14,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:49:14,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:49:14,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:49:14,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:49:15,032 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2019-10-14 23:49:15,032 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082085174] [2019-10-14 23:49:15,032 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855096633] [2019-10-14 23:49:15,033 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 [2019-10-14 23:49:15,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:49:15,394 INFO L256 TraceCheckSpWp]: Trace formula consists of 925 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-14 23:49:15,414 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:49:15,524 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2019-10-14 23:49:15,525 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:49:15,529 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 4] total 24 [2019-10-14 23:49:15,529 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128589795] [2019-10-14 23:49:15,530 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-10-14 23:49:15,531 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:49:15,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-10-14 23:49:15,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=490, Unknown=0, NotChecked=0, Total=552 [2019-10-14 23:49:15,532 INFO L87 Difference]: Start difference. First operand 147 states and 208 transitions. Second operand 24 states. [2019-10-14 23:49:15,703 WARN L191 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2019-10-14 23:49:16,020 WARN L191 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 120 [2019-10-14 23:49:35,191 WARN L191 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2019-10-14 23:49:35,667 WARN L191 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 126 [2019-10-14 23:49:36,158 WARN L191 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2019-10-14 23:49:36,416 WARN L191 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2019-10-14 23:49:36,839 WARN L191 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2019-10-14 23:49:37,090 WARN L191 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2019-10-14 23:49:38,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:49:38,122 INFO L93 Difference]: Finished difference Result 385 states and 581 transitions. [2019-10-14 23:49:38,123 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2019-10-14 23:49:38,123 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 94 [2019-10-14 23:49:38,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:49:38,128 INFO L225 Difference]: With dead ends: 385 [2019-10-14 23:49:38,128 INFO L226 Difference]: Without dead ends: 245 [2019-10-14 23:49:38,132 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 454 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=345, Invalid=2205, Unknown=0, NotChecked=0, Total=2550 [2019-10-14 23:49:38,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2019-10-14 23:49:38,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 218. [2019-10-14 23:49:38,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 218 states. [2019-10-14 23:49:38,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 317 transitions. [2019-10-14 23:49:38,180 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 317 transitions. Word has length 94 [2019-10-14 23:49:38,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:49:38,180 INFO L462 AbstractCegarLoop]: Abstraction has 218 states and 317 transitions. [2019-10-14 23:49:38,180 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-10-14 23:49:38,181 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 317 transitions. [2019-10-14 23:49:38,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2019-10-14 23:49:38,185 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:49:38,185 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:49:38,393 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:49:38,394 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:49:38,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:49:38,395 INFO L82 PathProgramCache]: Analyzing trace with hash 1176169123, now seen corresponding path program 1 times [2019-10-14 23:49:38,395 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:49:38,395 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354073288] [2019-10-14 23:49:38,396 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:49:38,396 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:49:38,396 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:49:38,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:49:38,718 WARN L191 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2019-10-14 23:49:38,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:49:38,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:49:38,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:49:39,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:49:39,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:49:39,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:49:39,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:49:39,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:49:39,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:49:39,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:49:39,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:49:39,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:49:39,556 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2019-10-14 23:49:39,557 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354073288] [2019-10-14 23:49:39,557 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141426565] [2019-10-14 23:49:39,557 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 [2019-10-14 23:49:39,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:49:39,851 INFO L256 TraceCheckSpWp]: Trace formula consists of 942 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 23:49:39,858 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:49:39,956 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2019-10-14 23:49:39,957 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:49:39,957 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 5] total 27 [2019-10-14 23:49:39,957 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369143872] [2019-10-14 23:49:39,958 INFO L442 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-10-14 23:49:39,958 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:49:39,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-10-14 23:49:39,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=631, Unknown=0, NotChecked=0, Total=702 [2019-10-14 23:49:39,959 INFO L87 Difference]: Start difference. First operand 218 states and 317 transitions. Second operand 27 states. [2019-10-14 23:49:40,119 WARN L191 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2019-10-14 23:49:40,400 WARN L191 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 120