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_szymanski.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 19:50:04,343 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 19:50:04,345 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 19:50:04,357 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 19:50:04,358 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 19:50:04,359 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 19:50:04,360 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 19:50:04,362 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 19:50:04,364 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 19:50:04,365 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 19:50:04,366 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 19:50:04,367 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 19:50:04,367 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 19:50:04,368 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 19:50:04,369 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 19:50:04,371 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 19:50:04,371 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 19:50:04,372 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 19:50:04,374 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 19:50:04,376 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 19:50:04,377 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 19:50:04,379 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 19:50:04,380 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 19:50:04,381 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 19:50:04,383 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-13 19:50:04,384 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-13 19:50:04,384 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-13 19:50:04,385 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-13 19:50:04,385 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-13 19:50:04,386 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-13 19:50:04,387 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 19:50:04,387 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 19:50:04,388 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 19:50:04,389 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 19:50:04,390 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 19:50:04,390 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 19:50:04,391 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 19:50:04,391 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 19:50:04,392 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 19:50:04,393 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 19:50:04,393 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 19:50:04,394 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 [2019-10-13 19:50:04,408 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 19:50:04,409 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 19:50:04,410 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 19:50:04,410 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 19:50:04,410 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 19:50:04,410 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 19:50:04,411 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 19:50:04,411 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 19:50:04,411 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 19:50:04,411 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 19:50:04,411 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 19:50:04,412 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 19:50:04,412 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 19:50:04,412 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 19:50:04,412 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 19:50:04,412 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 19:50:04,413 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 19:50:04,413 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 19:50:04,413 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 19:50:04,413 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 19:50:04,413 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 19:50:04,414 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 19:50:04,414 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 19:50:04,414 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 19:50:04,414 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 19:50:04,415 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 19:50:04,415 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 19:50:04,415 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 19:50:04,415 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-13 19:50:04,721 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 19:50:04,739 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 19:50:04,744 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 19:50:04,745 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 19:50:04,746 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 19:50:04,746 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-pthread/cs_szymanski.i [2019-10-13 19:50:04,824 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8e291306e/9191a9e53bd04b7881f84836f18c4c20/FLAG4a47b8161 [2019-10-13 19:50:05,422 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 19:50:05,423 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-pthread/cs_szymanski.i [2019-10-13 19:50:05,450 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8e291306e/9191a9e53bd04b7881f84836f18c4c20/FLAG4a47b8161 [2019-10-13 19:50:05,717 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8e291306e/9191a9e53bd04b7881f84836f18c4c20 [2019-10-13 19:50:05,727 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 19:50:05,729 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 19:50:05,732 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 19:50:05,732 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 19:50:05,736 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 19:50:05,737 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:50:05" (1/1) ... [2019-10-13 19:50:05,739 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@26202a62 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:50:05, skipping insertion in model container [2019-10-13 19:50:05,740 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:50:05" (1/1) ... [2019-10-13 19:50:05,747 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 19:50:05,808 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 19:50:06,391 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 19:50:06,418 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 19:50:06,523 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 19:50:06,593 INFO L192 MainTranslator]: Completed translation [2019-10-13 19:50:06,593 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:50:06 WrapperNode [2019-10-13 19:50:06,593 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 19:50:06,594 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 19:50:06,594 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 19:50:06,594 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 19:50:06,605 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:50:06" (1/1) ... [2019-10-13 19:50:06,605 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:50:06" (1/1) ... [2019-10-13 19:50:06,634 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:50:06" (1/1) ... [2019-10-13 19:50:06,635 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:50:06" (1/1) ... [2019-10-13 19:50:06,682 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:50:06" (1/1) ... [2019-10-13 19:50:06,695 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:50:06" (1/1) ... [2019-10-13 19:50:06,703 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:50:06" (1/1) ... [2019-10-13 19:50:06,715 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 19:50:06,716 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 19:50:06,716 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 19:50:06,716 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 19:50:06,717 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:50:06" (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 [2019-10-13 19:50:06,790 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 19:50:06,790 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 19:50:06,790 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~$Pointer$ [2019-10-13 19:50:06,790 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2019-10-13 19:50:06,791 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2019-10-13 19:50:06,792 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2019-10-13 19:50:06,792 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2019-10-13 19:50:06,792 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2019-10-13 19:50:06,793 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-13 19:50:06,793 INFO L138 BoogieDeclarations]: Found implementation of procedure __CS_cs [2019-10-13 19:50:06,793 INFO L138 BoogieDeclarations]: Found implementation of procedure __CS_pthread_mutex_init [2019-10-13 19:50:06,794 INFO L138 BoogieDeclarations]: Found implementation of procedure __CS_pthread_mutex_destroy [2019-10-13 19:50:06,794 INFO L138 BoogieDeclarations]: Found implementation of procedure __CS_pthread_mutex_lock [2019-10-13 19:50:06,795 INFO L138 BoogieDeclarations]: Found implementation of procedure __CS_pthread_mutex_unlock [2019-10-13 19:50:06,795 INFO L138 BoogieDeclarations]: Found implementation of procedure __CS_pthread_cond_init [2019-10-13 19:50:06,796 INFO L138 BoogieDeclarations]: Found implementation of procedure __CS_pthread_cond_signal [2019-10-13 19:50:06,798 INFO L138 BoogieDeclarations]: Found implementation of procedure __CS_pthread_cond_broadcast [2019-10-13 19:50:06,798 INFO L138 BoogieDeclarations]: Found implementation of procedure __CS_pthread_cond_wait [2019-10-13 19:50:06,799 INFO L138 BoogieDeclarations]: Found implementation of procedure __CS_assert [2019-10-13 19:50:06,800 INFO L138 BoogieDeclarations]: Found implementation of procedure __CS_assume [2019-10-13 19:50:06,800 INFO L138 BoogieDeclarations]: Found implementation of procedure __CS_pthread_join [2019-10-13 19:50:06,800 INFO L138 BoogieDeclarations]: Found implementation of procedure __CS_pthread_create [2019-10-13 19:50:06,801 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2019-10-13 19:50:06,801 INFO L138 BoogieDeclarations]: Found implementation of procedure thr2 [2019-10-13 19:50:06,801 INFO L138 BoogieDeclarations]: Found implementation of procedure main_thread [2019-10-13 19:50:06,801 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 19:50:06,802 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 19:50:06,802 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_pointer [2019-10-13 19:50:06,803 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2019-10-13 19:50:06,803 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-10-13 19:50:06,803 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 19:50:06,804 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2019-10-13 19:50:06,804 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2019-10-13 19:50:06,804 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2019-10-13 19:50:06,805 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2019-10-13 19:50:06,805 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2019-10-13 19:50:06,805 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2019-10-13 19:50:06,805 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2019-10-13 19:50:06,806 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2019-10-13 19:50:06,806 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2019-10-13 19:50:06,806 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2019-10-13 19:50:06,807 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2019-10-13 19:50:06,807 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2019-10-13 19:50:06,807 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2019-10-13 19:50:06,808 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2019-10-13 19:50:06,808 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2019-10-13 19:50:06,808 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2019-10-13 19:50:06,808 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2019-10-13 19:50:06,809 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2019-10-13 19:50:06,809 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2019-10-13 19:50:06,809 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2019-10-13 19:50:06,809 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2019-10-13 19:50:06,810 INFO L130 BoogieDeclarations]: Found specification of procedure select [2019-10-13 19:50:06,810 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2019-10-13 19:50:06,810 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2019-10-13 19:50:06,810 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2019-10-13 19:50:06,811 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2019-10-13 19:50:06,811 INFO L130 BoogieDeclarations]: Found specification of procedure random [2019-10-13 19:50:06,811 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2019-10-13 19:50:06,811 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2019-10-13 19:50:06,812 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2019-10-13 19:50:06,812 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2019-10-13 19:50:06,812 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2019-10-13 19:50:06,812 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2019-10-13 19:50:06,813 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2019-10-13 19:50:06,813 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2019-10-13 19:50:06,813 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2019-10-13 19:50:06,814 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2019-10-13 19:50:06,815 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2019-10-13 19:50:06,815 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2019-10-13 19:50:06,816 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2019-10-13 19:50:06,816 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2019-10-13 19:50:06,816 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2019-10-13 19:50:06,816 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2019-10-13 19:50:06,817 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2019-10-13 19:50:06,818 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2019-10-13 19:50:06,818 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2019-10-13 19:50:06,818 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2019-10-13 19:50:06,818 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2019-10-13 19:50:06,818 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2019-10-13 19:50:06,818 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2019-10-13 19:50:06,819 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2019-10-13 19:50:06,819 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2019-10-13 19:50:06,820 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2019-10-13 19:50:06,820 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2019-10-13 19:50:06,820 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2019-10-13 19:50:06,820 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-10-13 19:50:06,821 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2019-10-13 19:50:06,821 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2019-10-13 19:50:06,822 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-10-13 19:50:06,822 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2019-10-13 19:50:06,823 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2019-10-13 19:50:06,823 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2019-10-13 19:50:06,823 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2019-10-13 19:50:06,823 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2019-10-13 19:50:06,824 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2019-10-13 19:50:06,824 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2019-10-13 19:50:06,824 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2019-10-13 19:50:06,824 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 19:50:06,824 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2019-10-13 19:50:06,825 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2019-10-13 19:50:06,825 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2019-10-13 19:50:06,825 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2019-10-13 19:50:06,825 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2019-10-13 19:50:06,825 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2019-10-13 19:50:06,825 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2019-10-13 19:50:06,826 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2019-10-13 19:50:06,826 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2019-10-13 19:50:06,826 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2019-10-13 19:50:06,826 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2019-10-13 19:50:06,826 INFO L130 BoogieDeclarations]: Found specification of procedure system [2019-10-13 19:50:06,826 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2019-10-13 19:50:06,827 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2019-10-13 19:50:06,827 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2019-10-13 19:50:06,827 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2019-10-13 19:50:06,827 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2019-10-13 19:50:06,828 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2019-10-13 19:50:06,828 INFO L130 BoogieDeclarations]: Found specification of procedure div [2019-10-13 19:50:06,828 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2019-10-13 19:50:06,828 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2019-10-13 19:50:06,828 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2019-10-13 19:50:06,829 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2019-10-13 19:50:06,829 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2019-10-13 19:50:06,830 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2019-10-13 19:50:06,830 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2019-10-13 19:50:06,830 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2019-10-13 19:50:06,830 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2019-10-13 19:50:06,830 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2019-10-13 19:50:06,830 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2019-10-13 19:50:06,831 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2019-10-13 19:50:06,831 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2019-10-13 19:50:06,831 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2019-10-13 19:50:06,832 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2019-10-13 19:50:06,832 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2019-10-13 19:50:06,832 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2019-10-13 19:50:06,833 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2019-10-13 19:50:06,833 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2019-10-13 19:50:06,833 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2019-10-13 19:50:06,834 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2019-10-13 19:50:06,835 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2019-10-13 19:50:06,839 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2019-10-13 19:50:06,840 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-13 19:50:06,840 INFO L130 BoogieDeclarations]: Found specification of procedure __CS_cs [2019-10-13 19:50:06,841 INFO L130 BoogieDeclarations]: Found specification of procedure __CS_pthread_mutex_init [2019-10-13 19:50:06,848 INFO L130 BoogieDeclarations]: Found specification of procedure __CS_pthread_mutex_destroy [2019-10-13 19:50:06,849 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-13 19:50:06,849 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-13 19:50:06,849 INFO L130 BoogieDeclarations]: Found specification of procedure __CS_pthread_mutex_lock [2019-10-13 19:50:06,849 INFO L130 BoogieDeclarations]: Found specification of procedure __CS_pthread_mutex_unlock [2019-10-13 19:50:06,849 INFO L130 BoogieDeclarations]: Found specification of procedure __CS_pthread_cond_init [2019-10-13 19:50:06,850 INFO L130 BoogieDeclarations]: Found specification of procedure __CS_pthread_cond_signal [2019-10-13 19:50:06,850 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-10-13 19:50:06,850 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-10-13 19:50:06,850 INFO L130 BoogieDeclarations]: Found specification of procedure __CS_pthread_cond_broadcast [2019-10-13 19:50:06,850 INFO L130 BoogieDeclarations]: Found specification of procedure __CS_pthread_cond_wait [2019-10-13 19:50:06,850 INFO L130 BoogieDeclarations]: Found specification of procedure __CS_assert [2019-10-13 19:50:06,850 INFO L130 BoogieDeclarations]: Found specification of procedure __CS_assume [2019-10-13 19:50:06,851 INFO L130 BoogieDeclarations]: Found specification of procedure __CS_pthread_join [2019-10-13 19:50:06,851 INFO L130 BoogieDeclarations]: Found specification of procedure __CS_pthread_create [2019-10-13 19:50:06,851 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2019-10-13 19:50:06,852 INFO L130 BoogieDeclarations]: Found specification of procedure thr2 [2019-10-13 19:50:06,852 INFO L130 BoogieDeclarations]: Found specification of procedure main_thread [2019-10-13 19:50:06,853 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-13 19:50:06,853 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-10-13 19:50:06,853 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-13 19:50:06,853 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 19:50:06,854 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~$Pointer$ [2019-10-13 19:50:06,854 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 19:50:06,854 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2019-10-13 19:50:06,854 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 19:50:07,835 INFO L685 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##54: assume 0 != ~__CS_ret~0 % 256;#res.base, #res.offset := 0, 0; [2019-10-13 19:50:07,835 INFO L685 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##55: assume !(0 != ~__CS_ret~0 % 256); [2019-10-13 19:50:07,965 INFO L685 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##54: assume 0 != ~__CS_ret~0 % 256;#res.base, #res.offset := 0, 0; [2019-10-13 19:50:07,965 INFO L685 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##55: assume !(0 != ~__CS_ret~0 % 256); [2019-10-13 19:50:10,450 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 19:50:10,451 INFO L284 CfgBuilder]: Removed 12 assume(true) statements. [2019-10-13 19:50:10,452 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:50:10 BoogieIcfgContainer [2019-10-13 19:50:10,452 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 19:50:10,453 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 19:50:10,454 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 19:50:10,457 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 19:50:10,457 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 07:50:05" (1/3) ... [2019-10-13 19:50:10,458 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34882da5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:50:10, skipping insertion in model container [2019-10-13 19:50:10,458 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:50:06" (2/3) ... [2019-10-13 19:50:10,459 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34882da5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:50:10, skipping insertion in model container [2019-10-13 19:50:10,459 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:50:10" (3/3) ... [2019-10-13 19:50:10,460 INFO L109 eAbstractionObserver]: Analyzing ICFG cs_szymanski.i [2019-10-13 19:50:10,471 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 19:50:10,480 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 19:50:10,492 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 19:50:10,524 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 19:50:10,524 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 19:50:10,525 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 19:50:10,525 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 19:50:10,525 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 19:50:10,525 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 19:50:10,525 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 19:50:10,525 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 19:50:10,551 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states. [2019-10-13 19:50:10,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-10-13 19:50:10,558 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:50:10,579 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:50:10,581 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:50:10,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:50:10,587 INFO L82 PathProgramCache]: Analyzing trace with hash 1039871574, now seen corresponding path program 1 times [2019-10-13 19:50:10,596 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:50:10,596 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944496782] [2019-10-13 19:50:10,597 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:50:10,597 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:50:10,597 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:50:10,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:50:11,053 WARN L191 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2019-10-13 19:50:11,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:50:11,112 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:50:11,114 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944496782] [2019-10-13 19:50:11,116 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 19:50:11,116 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-13 19:50:11,116 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056064881] [2019-10-13 19:50:11,120 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 19:50:11,120 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:50:11,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 19:50:11,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 19:50:11,133 INFO L87 Difference]: Start difference. First operand 186 states. Second operand 3 states. [2019-10-13 19:50:13,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:50:13,581 INFO L93 Difference]: Finished difference Result 158 states and 219 transitions. [2019-10-13 19:50:13,583 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 19:50:13,585 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2019-10-13 19:50:13,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:50:13,602 INFO L225 Difference]: With dead ends: 158 [2019-10-13 19:50:13,603 INFO L226 Difference]: Without dead ends: 77 [2019-10-13 19:50:13,610 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 [2019-10-13 19:50:13,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2019-10-13 19:50:13,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 73. [2019-10-13 19:50:13,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2019-10-13 19:50:13,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 99 transitions. [2019-10-13 19:50:13,700 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 99 transitions. Word has length 18 [2019-10-13 19:50:13,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:50:13,701 INFO L462 AbstractCegarLoop]: Abstraction has 73 states and 99 transitions. [2019-10-13 19:50:13,701 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 19:50:13,701 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 99 transitions. [2019-10-13 19:50:13,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-10-13 19:50:13,705 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:50:13,705 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:50:13,705 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:50:13,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:50:13,707 INFO L82 PathProgramCache]: Analyzing trace with hash -1283617368, now seen corresponding path program 1 times [2019-10-13 19:50:13,707 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:50:13,708 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329989648] [2019-10-13 19:50:13,708 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:50:13,708 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:50:13,708 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:50:13,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:50:14,007 WARN L191 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2019-10-13 19:50:14,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:50:14,040 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:50:14,041 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329989648] [2019-10-13 19:50:14,041 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 19:50:14,041 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 19:50:14,042 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29863229] [2019-10-13 19:50:14,046 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 19:50:14,047 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:50:14,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 19:50:14,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 19:50:14,048 INFO L87 Difference]: Start difference. First operand 73 states and 99 transitions. Second operand 4 states. [2019-10-13 19:50:16,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:50:16,543 INFO L93 Difference]: Finished difference Result 144 states and 198 transitions. [2019-10-13 19:50:16,543 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 19:50:16,544 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2019-10-13 19:50:16,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:50:16,549 INFO L225 Difference]: With dead ends: 144 [2019-10-13 19:50:16,549 INFO L226 Difference]: Without dead ends: 81 [2019-10-13 19:50:16,552 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 [2019-10-13 19:50:16,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2019-10-13 19:50:16,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 74. [2019-10-13 19:50:16,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2019-10-13 19:50:16,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 100 transitions. [2019-10-13 19:50:16,580 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 100 transitions. Word has length 18 [2019-10-13 19:50:16,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:50:16,582 INFO L462 AbstractCegarLoop]: Abstraction has 74 states and 100 transitions. [2019-10-13 19:50:16,582 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 19:50:16,582 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 100 transitions. [2019-10-13 19:50:16,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-10-13 19:50:16,583 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:50:16,583 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] [2019-10-13 19:50:16,584 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:50:16,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:50:16,584 INFO L82 PathProgramCache]: Analyzing trace with hash -1552651987, now seen corresponding path program 1 times [2019-10-13 19:50:16,585 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:50:16,585 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684535030] [2019-10-13 19:50:16,585 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:50:16,585 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:50:16,585 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:50:16,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:50:16,770 WARN L191 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2019-10-13 19:50:16,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:50:16,797 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:50:16,798 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684535030] [2019-10-13 19:50:16,798 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 19:50:16,798 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 19:50:16,799 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282158210] [2019-10-13 19:50:16,799 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 19:50:16,799 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:50:16,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 19:50:16,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 19:50:16,800 INFO L87 Difference]: Start difference. First operand 74 states and 100 transitions. Second operand 4 states. [2019-10-13 19:50:18,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:50:18,381 INFO L93 Difference]: Finished difference Result 147 states and 202 transitions. [2019-10-13 19:50:18,382 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 19:50:18,383 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2019-10-13 19:50:18,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:50:18,385 INFO L225 Difference]: With dead ends: 147 [2019-10-13 19:50:18,385 INFO L226 Difference]: Without dead ends: 80 [2019-10-13 19:50:18,388 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 [2019-10-13 19:50:18,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2019-10-13 19:50:18,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 75. [2019-10-13 19:50:18,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2019-10-13 19:50:18,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 101 transitions. [2019-10-13 19:50:18,410 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 101 transitions. Word has length 21 [2019-10-13 19:50:18,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:50:18,410 INFO L462 AbstractCegarLoop]: Abstraction has 75 states and 101 transitions. [2019-10-13 19:50:18,411 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 19:50:18,411 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 101 transitions. [2019-10-13 19:50:18,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-10-13 19:50:18,412 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:50:18,412 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] [2019-10-13 19:50:18,412 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:50:18,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:50:18,413 INFO L82 PathProgramCache]: Analyzing trace with hash -406679793, now seen corresponding path program 1 times [2019-10-13 19:50:18,413 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:50:18,413 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469746104] [2019-10-13 19:50:18,413 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:50:18,413 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:50:18,414 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:50:18,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:50:18,706 WARN L191 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2019-10-13 19:50:18,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:50:18,726 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-13 19:50:18,727 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469746104] [2019-10-13 19:50:18,727 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 19:50:18,727 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-13 19:50:18,727 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346249513] [2019-10-13 19:50:18,728 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 19:50:18,728 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:50:18,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 19:50:18,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-10-13 19:50:18,729 INFO L87 Difference]: Start difference. First operand 75 states and 101 transitions. Second operand 6 states. [2019-10-13 19:50:21,311 WARN L191 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 108 [2019-10-13 19:50:21,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:50:21,850 INFO L93 Difference]: Finished difference Result 143 states and 201 transitions. [2019-10-13 19:50:21,850 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 19:50:21,850 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 23 [2019-10-13 19:50:21,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:50:21,853 INFO L225 Difference]: With dead ends: 143 [2019-10-13 19:50:21,853 INFO L226 Difference]: Without dead ends: 135 [2019-10-13 19:50:21,854 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 [2019-10-13 19:50:21,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2019-10-13 19:50:21,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 129. [2019-10-13 19:50:21,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2019-10-13 19:50:21,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 182 transitions. [2019-10-13 19:50:21,878 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 182 transitions. Word has length 23 [2019-10-13 19:50:21,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:50:21,879 INFO L462 AbstractCegarLoop]: Abstraction has 129 states and 182 transitions. [2019-10-13 19:50:21,879 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 19:50:21,879 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 182 transitions. [2019-10-13 19:50:21,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2019-10-13 19:50:21,883 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:50:21,883 INFO L380 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] [2019-10-13 19:50:21,883 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:50:21,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:50:21,884 INFO L82 PathProgramCache]: Analyzing trace with hash 1197646543, now seen corresponding path program 1 times [2019-10-13 19:50:21,884 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:50:21,884 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457656162] [2019-10-13 19:50:21,885 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:50:21,885 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:50:21,885 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:50:21,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:50:22,240 WARN L191 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2019-10-13 19:50:22,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:50:22,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:50:22,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:50:22,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:50:22,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:50:22,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:50:22,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:50:22,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:50:22,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:50:22,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:50:22,798 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-10-13 19:50:22,799 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457656162] [2019-10-13 19:50:22,799 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1283525462] [2019-10-13 19:50:22,799 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 [2019-10-13 19:50:23,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:50:23,086 INFO L256 TraceCheckSpWp]: Trace formula consists of 837 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 19:50:23,097 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:50:23,172 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-10-13 19:50:23,172 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 19:50:23,173 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 4] total 22 [2019-10-13 19:50:23,173 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053542334] [2019-10-13 19:50:23,174 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-10-13 19:50:23,174 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:50:23,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-10-13 19:50:23,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2019-10-13 19:50:23,175 INFO L87 Difference]: Start difference. First operand 129 states and 182 transitions. Second operand 22 states. [2019-10-13 19:50:23,339 WARN L191 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2019-10-13 19:50:23,610 WARN L191 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 111 [2019-10-13 19:50:42,611 WARN L191 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 117 [2019-10-13 19:50:43,155 WARN L191 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2019-10-13 19:50:43,396 WARN L191 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2019-10-13 19:50:43,824 WARN L191 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2019-10-13 19:50:44,498 WARN L191 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2019-10-13 19:50:44,903 WARN L191 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2019-10-13 19:50:45,554 WARN L191 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2019-10-13 19:50:46,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:50:46,098 INFO L93 Difference]: Finished difference Result 414 states and 627 transitions. [2019-10-13 19:50:46,099 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2019-10-13 19:50:46,099 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 80 [2019-10-13 19:50:46,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:50:46,103 INFO L225 Difference]: With dead ends: 414 [2019-10-13 19:50:46,103 INFO L226 Difference]: Without dead ends: 292 [2019-10-13 19:50:46,106 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 666 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=431, Invalid=2761, Unknown=0, NotChecked=0, Total=3192 [2019-10-13 19:50:46,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2019-10-13 19:50:46,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 264. [2019-10-13 19:50:46,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 264 states. [2019-10-13 19:50:46,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 388 transitions. [2019-10-13 19:50:46,168 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 388 transitions. Word has length 80 [2019-10-13 19:50:46,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:50:46,170 INFO L462 AbstractCegarLoop]: Abstraction has 264 states and 388 transitions. [2019-10-13 19:50:46,170 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-10-13 19:50:46,170 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 388 transitions. [2019-10-13 19:50:46,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2019-10-13 19:50:46,174 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:50:46,174 INFO L380 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] [2019-10-13 19:50:46,381 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:50:46,381 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:50:46,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:50:46,382 INFO L82 PathProgramCache]: Analyzing trace with hash 1436320174, now seen corresponding path program 1 times [2019-10-13 19:50:46,382 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:50:46,382 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105118526] [2019-10-13 19:50:46,383 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:50:46,383 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:50:46,383 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:50:46,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:50:46,614 WARN L191 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2019-10-13 19:50:46,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:50:46,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:50:46,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:50:46,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:50:46,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:50:46,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:50:46,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:50:47,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:50:47,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:50:47,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:50:47,297 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-10-13 19:50:47,297 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105118526] [2019-10-13 19:50:47,298 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298311423] [2019-10-13 19:50:47,298 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 [2019-10-13 19:50:47,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:50:47,518 INFO L256 TraceCheckSpWp]: Trace formula consists of 854 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 19:50:47,524 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:50:47,584 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-10-13 19:50:47,584 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 19:50:47,584 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 5] total 23 [2019-10-13 19:50:47,584 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674484564] [2019-10-13 19:50:47,585 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-10-13 19:50:47,585 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:50:47,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-10-13 19:50:47,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=449, Unknown=0, NotChecked=0, Total=506 [2019-10-13 19:50:47,586 INFO L87 Difference]: Start difference. First operand 264 states and 388 transitions. Second operand 23 states. [2019-10-13 19:50:47,900 WARN L191 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 111