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 0.1.24-13a467a-m [2019-10-14 23:48:59,630 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 23:48:59,633 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 23:48:59,648 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 23:48:59,648 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 23:48:59,650 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 23:48:59,651 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 23:48:59,653 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 23:48:59,654 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 23:48:59,655 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 23:48:59,656 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 23:48:59,657 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 23:48:59,658 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 23:48:59,659 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 23:48:59,662 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 23:48:59,663 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 23:48:59,664 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 23:48:59,666 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 23:48:59,670 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 23:48:59,675 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 23:48:59,678 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 23:48:59,680 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 23:48:59,681 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 23:48:59,682 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 23:48:59,686 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-14 23:48:59,686 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-14 23:48:59,686 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-14 23:48:59,687 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-14 23:48:59,687 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-14 23:48:59,690 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-14 23:48:59,691 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 23:48:59,692 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 23:48:59,693 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 23:48:59,694 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 23:48:59,698 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 23:48:59,699 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 23:48:59,700 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 23:48:59,700 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 23:48:59,700 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 23:48:59,702 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 23:48:59,707 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 23:48:59,707 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 23:48:59,728 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 23:48:59,729 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 23:48:59,731 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 23:48:59,731 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 23:48:59,731 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 23:48:59,732 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 23:48:59,732 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 23:48:59,732 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 23:48:59,732 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 23:48:59,732 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 23:48:59,734 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 23:48:59,734 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 23:48:59,734 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 23:48:59,735 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 23:48:59,735 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 23:48:59,735 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 23:48:59,735 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 23:48:59,735 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 23:48:59,735 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 23:48:59,736 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 23:48:59,736 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 23:48:59,736 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 23:48:59,736 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 23:48:59,736 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 23:48:59,737 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 23:48:59,737 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 23:48:59,737 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 23:48:59,737 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 23:48:59,737 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 23:49:00,045 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 23:49:00,058 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 23:49:00,061 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 23:49:00,063 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 23:49:00,063 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 23:49:00,064 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-pthread/cs_szymanski.i [2019-10-14 23:49:00,122 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/38e2867e8/bb56a001580642f489a9413d5a7aefb0/FLAGa1e07e2a0 [2019-10-14 23:49:00,688 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 23:49:00,689 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-pthread/cs_szymanski.i [2019-10-14 23:49:00,719 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/38e2867e8/bb56a001580642f489a9413d5a7aefb0/FLAGa1e07e2a0 [2019-10-14 23:49:00,941 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/38e2867e8/bb56a001580642f489a9413d5a7aefb0 [2019-10-14 23:49:00,951 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 23:49:00,953 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 23:49:00,954 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 23:49:00,954 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 23:49:00,957 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 23:49:00,958 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:49:00" (1/1) ... [2019-10-14 23:49:00,960 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4bbca3b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:49:00, skipping insertion in model container [2019-10-14 23:49:00,960 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:49:00" (1/1) ... [2019-10-14 23:49:00,967 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 23:49:01,027 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 23:49:01,602 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:49:01,632 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 23:49:01,717 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:49:01,798 INFO L192 MainTranslator]: Completed translation [2019-10-14 23:49:01,798 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:49:01 WrapperNode [2019-10-14 23:49:01,799 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 23:49:01,800 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 23:49:01,800 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 23:49:01,800 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 23:49:01,812 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:49:01" (1/1) ... [2019-10-14 23:49:01,812 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:49:01" (1/1) ... [2019-10-14 23:49:01,843 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:49:01" (1/1) ... [2019-10-14 23:49:01,843 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:49:01" (1/1) ... [2019-10-14 23:49:01,890 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:49:01" (1/1) ... [2019-10-14 23:49:01,904 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:49:01" (1/1) ... [2019-10-14 23:49:01,912 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:49:01" (1/1) ... [2019-10-14 23:49:01,929 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 23:49:01,930 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 23:49:01,930 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 23:49:01,930 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 23:49:01,931 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:49:01" (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 23:49:02,003 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 23:49:02,003 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 23:49:02,003 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~$Pointer$ [2019-10-14 23:49:02,003 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2019-10-14 23:49:02,004 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2019-10-14 23:49:02,004 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2019-10-14 23:49:02,004 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2019-10-14 23:49:02,004 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2019-10-14 23:49:02,005 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-14 23:49:02,005 INFO L138 BoogieDeclarations]: Found implementation of procedure __CS_cs [2019-10-14 23:49:02,005 INFO L138 BoogieDeclarations]: Found implementation of procedure __CS_pthread_mutex_init [2019-10-14 23:49:02,005 INFO L138 BoogieDeclarations]: Found implementation of procedure __CS_pthread_mutex_destroy [2019-10-14 23:49:02,005 INFO L138 BoogieDeclarations]: Found implementation of procedure __CS_pthread_mutex_lock [2019-10-14 23:49:02,006 INFO L138 BoogieDeclarations]: Found implementation of procedure __CS_pthread_mutex_unlock [2019-10-14 23:49:02,006 INFO L138 BoogieDeclarations]: Found implementation of procedure __CS_pthread_cond_init [2019-10-14 23:49:02,006 INFO L138 BoogieDeclarations]: Found implementation of procedure __CS_pthread_cond_signal [2019-10-14 23:49:02,006 INFO L138 BoogieDeclarations]: Found implementation of procedure __CS_pthread_cond_broadcast [2019-10-14 23:49:02,007 INFO L138 BoogieDeclarations]: Found implementation of procedure __CS_pthread_cond_wait [2019-10-14 23:49:02,007 INFO L138 BoogieDeclarations]: Found implementation of procedure __CS_assert [2019-10-14 23:49:02,007 INFO L138 BoogieDeclarations]: Found implementation of procedure __CS_assume [2019-10-14 23:49:02,007 INFO L138 BoogieDeclarations]: Found implementation of procedure __CS_pthread_join [2019-10-14 23:49:02,007 INFO L138 BoogieDeclarations]: Found implementation of procedure __CS_pthread_create [2019-10-14 23:49:02,008 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2019-10-14 23:49:02,008 INFO L138 BoogieDeclarations]: Found implementation of procedure thr2 [2019-10-14 23:49:02,008 INFO L138 BoogieDeclarations]: Found implementation of procedure main_thread [2019-10-14 23:49:02,008 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 23:49:02,009 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 23:49:02,009 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_pointer [2019-10-14 23:49:02,009 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2019-10-14 23:49:02,009 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-10-14 23:49:02,009 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 23:49:02,010 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2019-10-14 23:49:02,010 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2019-10-14 23:49:02,010 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2019-10-14 23:49:02,010 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2019-10-14 23:49:02,010 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2019-10-14 23:49:02,011 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2019-10-14 23:49:02,011 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2019-10-14 23:49:02,011 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2019-10-14 23:49:02,011 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2019-10-14 23:49:02,011 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2019-10-14 23:49:02,012 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2019-10-14 23:49:02,012 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2019-10-14 23:49:02,012 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2019-10-14 23:49:02,012 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2019-10-14 23:49:02,012 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2019-10-14 23:49:02,012 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2019-10-14 23:49:02,015 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2019-10-14 23:49:02,015 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2019-10-14 23:49:02,015 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2019-10-14 23:49:02,016 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2019-10-14 23:49:02,016 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2019-10-14 23:49:02,016 INFO L130 BoogieDeclarations]: Found specification of procedure select [2019-10-14 23:49:02,016 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2019-10-14 23:49:02,017 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2019-10-14 23:49:02,017 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2019-10-14 23:49:02,017 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2019-10-14 23:49:02,017 INFO L130 BoogieDeclarations]: Found specification of procedure random [2019-10-14 23:49:02,017 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2019-10-14 23:49:02,018 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2019-10-14 23:49:02,018 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2019-10-14 23:49:02,018 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2019-10-14 23:49:02,018 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2019-10-14 23:49:02,018 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2019-10-14 23:49:02,019 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2019-10-14 23:49:02,019 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2019-10-14 23:49:02,019 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2019-10-14 23:49:02,020 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2019-10-14 23:49:02,021 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2019-10-14 23:49:02,021 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2019-10-14 23:49:02,021 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2019-10-14 23:49:02,022 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2019-10-14 23:49:02,022 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2019-10-14 23:49:02,022 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2019-10-14 23:49:02,023 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2019-10-14 23:49:02,024 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2019-10-14 23:49:02,024 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2019-10-14 23:49:02,024 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2019-10-14 23:49:02,024 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2019-10-14 23:49:02,024 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2019-10-14 23:49:02,025 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2019-10-14 23:49:02,025 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2019-10-14 23:49:02,026 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2019-10-14 23:49:02,026 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2019-10-14 23:49:02,026 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2019-10-14 23:49:02,027 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2019-10-14 23:49:02,027 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-10-14 23:49:02,028 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2019-10-14 23:49:02,028 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2019-10-14 23:49:02,028 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-10-14 23:49:02,029 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2019-10-14 23:49:02,029 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2019-10-14 23:49:02,030 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2019-10-14 23:49:02,030 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2019-10-14 23:49:02,030 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2019-10-14 23:49:02,030 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2019-10-14 23:49:02,031 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2019-10-14 23:49:02,031 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2019-10-14 23:49:02,031 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-14 23:49:02,031 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2019-10-14 23:49:02,031 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2019-10-14 23:49:02,032 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2019-10-14 23:49:02,032 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2019-10-14 23:49:02,032 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2019-10-14 23:49:02,032 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2019-10-14 23:49:02,033 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2019-10-14 23:49:02,033 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2019-10-14 23:49:02,033 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2019-10-14 23:49:02,033 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2019-10-14 23:49:02,033 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2019-10-14 23:49:02,033 INFO L130 BoogieDeclarations]: Found specification of procedure system [2019-10-14 23:49:02,034 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2019-10-14 23:49:02,034 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2019-10-14 23:49:02,034 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2019-10-14 23:49:02,034 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2019-10-14 23:49:02,035 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2019-10-14 23:49:02,035 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2019-10-14 23:49:02,035 INFO L130 BoogieDeclarations]: Found specification of procedure div [2019-10-14 23:49:02,035 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2019-10-14 23:49:02,036 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2019-10-14 23:49:02,036 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2019-10-14 23:49:02,036 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2019-10-14 23:49:02,037 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2019-10-14 23:49:02,037 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2019-10-14 23:49:02,037 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2019-10-14 23:49:02,037 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2019-10-14 23:49:02,037 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2019-10-14 23:49:02,037 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2019-10-14 23:49:02,038 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2019-10-14 23:49:02,038 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2019-10-14 23:49:02,038 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2019-10-14 23:49:02,038 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2019-10-14 23:49:02,039 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2019-10-14 23:49:02,039 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2019-10-14 23:49:02,039 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2019-10-14 23:49:02,039 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2019-10-14 23:49:02,039 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2019-10-14 23:49:02,040 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2019-10-14 23:49:02,040 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2019-10-14 23:49:02,041 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2019-10-14 23:49:02,044 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2019-10-14 23:49:02,044 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-14 23:49:02,044 INFO L130 BoogieDeclarations]: Found specification of procedure __CS_cs [2019-10-14 23:49:02,045 INFO L130 BoogieDeclarations]: Found specification of procedure __CS_pthread_mutex_init [2019-10-14 23:49:02,052 INFO L130 BoogieDeclarations]: Found specification of procedure __CS_pthread_mutex_destroy [2019-10-14 23:49:02,052 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-14 23:49:02,052 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-14 23:49:02,052 INFO L130 BoogieDeclarations]: Found specification of procedure __CS_pthread_mutex_lock [2019-10-14 23:49:02,052 INFO L130 BoogieDeclarations]: Found specification of procedure __CS_pthread_mutex_unlock [2019-10-14 23:49:02,053 INFO L130 BoogieDeclarations]: Found specification of procedure __CS_pthread_cond_init [2019-10-14 23:49:02,053 INFO L130 BoogieDeclarations]: Found specification of procedure __CS_pthread_cond_signal [2019-10-14 23:49:02,053 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-10-14 23:49:02,053 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-10-14 23:49:02,053 INFO L130 BoogieDeclarations]: Found specification of procedure __CS_pthread_cond_broadcast [2019-10-14 23:49:02,053 INFO L130 BoogieDeclarations]: Found specification of procedure __CS_pthread_cond_wait [2019-10-14 23:49:02,054 INFO L130 BoogieDeclarations]: Found specification of procedure __CS_assert [2019-10-14 23:49:02,054 INFO L130 BoogieDeclarations]: Found specification of procedure __CS_assume [2019-10-14 23:49:02,054 INFO L130 BoogieDeclarations]: Found specification of procedure __CS_pthread_join [2019-10-14 23:49:02,055 INFO L130 BoogieDeclarations]: Found specification of procedure __CS_pthread_create [2019-10-14 23:49:02,055 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2019-10-14 23:49:02,055 INFO L130 BoogieDeclarations]: Found specification of procedure thr2 [2019-10-14 23:49:02,055 INFO L130 BoogieDeclarations]: Found specification of procedure main_thread [2019-10-14 23:49:02,056 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-14 23:49:02,056 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-10-14 23:49:02,056 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-14 23:49:02,056 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 23:49:02,056 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~$Pointer$ [2019-10-14 23:49:02,057 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 23:49:02,057 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2019-10-14 23:49:02,057 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 23:49:02,969 INFO L685 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##54: assume 0 != ~__CS_ret~0 % 256;#res.base, #res.offset := 0, 0; [2019-10-14 23:49:02,969 INFO L685 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##55: assume !(0 != ~__CS_ret~0 % 256); [2019-10-14 23:49:03,112 INFO L685 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##54: assume 0 != ~__CS_ret~0 % 256;#res.base, #res.offset := 0, 0; [2019-10-14 23:49:03,113 INFO L685 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##55: assume !(0 != ~__CS_ret~0 % 256); [2019-10-14 23:49:05,626 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 23:49:05,627 INFO L284 CfgBuilder]: Removed 12 assume(true) statements. [2019-10-14 23:49:05,628 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:49:05 BoogieIcfgContainer [2019-10-14 23:49:05,628 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 23:49:05,629 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 23:49:05,630 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 23:49:05,633 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 23:49:05,633 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 11:49:00" (1/3) ... [2019-10-14 23:49:05,634 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4bb6829 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:49:05, skipping insertion in model container [2019-10-14 23:49:05,634 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:49:01" (2/3) ... [2019-10-14 23:49:05,635 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4bb6829 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:49:05, skipping insertion in model container [2019-10-14 23:49:05,635 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:49:05" (3/3) ... [2019-10-14 23:49:05,636 INFO L109 eAbstractionObserver]: Analyzing ICFG cs_szymanski.i [2019-10-14 23:49:05,647 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 23:49:05,656 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 23:49:05,670 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 23:49:05,702 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 23:49:05,702 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 23:49:05,702 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 23:49:05,702 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 23:49:05,703 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 23:49:05,703 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 23:49:05,703 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 23:49:05,703 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 23:49:05,732 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states. [2019-10-14 23:49:05,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-10-14 23:49:05,740 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:49:05,742 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 23:49:05,744 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:49:05,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:49:05,751 INFO L82 PathProgramCache]: Analyzing trace with hash 1039871574, now seen corresponding path program 1 times [2019-10-14 23:49:05,762 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:49:05,763 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819357837] [2019-10-14 23:49:05,763 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:49:05,763 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:49:05,763 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:49:05,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:49:06,212 WARN L191 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2019-10-14 23:49:06,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:49:06,248 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 23:49:06,249 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819357837] [2019-10-14 23:49:06,253 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:49:06,253 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 23:49:06,254 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134866696] [2019-10-14 23:49:06,259 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 23:49:06,259 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:49:06,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 23:49:06,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 23:49:06,282 INFO L87 Difference]: Start difference. First operand 186 states. Second operand 3 states. [2019-10-14 23:49:08,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:49:08,802 INFO L93 Difference]: Finished difference Result 158 states and 219 transitions. [2019-10-14 23:49:08,804 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 23:49:08,806 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2019-10-14 23:49:08,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:49:08,823 INFO L225 Difference]: With dead ends: 158 [2019-10-14 23:49:08,824 INFO L226 Difference]: Without dead ends: 77 [2019-10-14 23:49:08,830 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 23:49:08,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2019-10-14 23:49:08,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 73. [2019-10-14 23:49:08,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2019-10-14 23:49:08,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 99 transitions. [2019-10-14 23:49:08,915 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 99 transitions. Word has length 18 [2019-10-14 23:49:08,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:49:08,916 INFO L462 AbstractCegarLoop]: Abstraction has 73 states and 99 transitions. [2019-10-14 23:49:08,916 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 23:49:08,916 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 99 transitions. [2019-10-14 23:49:08,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-10-14 23:49:08,920 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:49:08,920 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 23:49:08,921 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:49:08,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:49:08,922 INFO L82 PathProgramCache]: Analyzing trace with hash -1283617368, now seen corresponding path program 1 times [2019-10-14 23:49:08,922 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:49:08,922 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631221692] [2019-10-14 23:49:08,923 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:49:08,923 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:49:08,923 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:49:09,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:49:09,229 WARN L191 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2019-10-14 23:49:09,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:49:09,280 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 23:49:09,281 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631221692] [2019-10-14 23:49:09,281 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:49:09,283 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 23:49:09,283 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910482725] [2019-10-14 23:49:09,287 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 23:49:09,288 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:49:09,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 23:49:09,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 23:49:09,289 INFO L87 Difference]: Start difference. First operand 73 states and 99 transitions. Second operand 4 states. [2019-10-14 23:49:11,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:49:11,740 INFO L93 Difference]: Finished difference Result 144 states and 198 transitions. [2019-10-14 23:49:11,740 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 23:49:11,740 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2019-10-14 23:49:11,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:49:11,747 INFO L225 Difference]: With dead ends: 144 [2019-10-14 23:49:11,747 INFO L226 Difference]: Without dead ends: 81 [2019-10-14 23:49:11,749 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 23:49:11,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2019-10-14 23:49:11,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 74. [2019-10-14 23:49:11,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2019-10-14 23:49:11,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 100 transitions. [2019-10-14 23:49:11,770 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 100 transitions. Word has length 18 [2019-10-14 23:49:11,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:49:11,770 INFO L462 AbstractCegarLoop]: Abstraction has 74 states and 100 transitions. [2019-10-14 23:49:11,771 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 23:49:11,771 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 100 transitions. [2019-10-14 23:49:11,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-10-14 23:49:11,772 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:49:11,772 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 23:49:11,772 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:49:11,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:49:11,772 INFO L82 PathProgramCache]: Analyzing trace with hash -1552651987, now seen corresponding path program 1 times [2019-10-14 23:49:11,773 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:49:11,773 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918431186] [2019-10-14 23:49:11,773 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:49:11,773 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:49:11,773 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:49:11,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:49:11,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:49:11,935 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 23:49:11,935 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918431186] [2019-10-14 23:49:11,936 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:49:11,936 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 23:49:11,936 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107612750] [2019-10-14 23:49:11,936 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 23:49:11,937 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:49:11,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 23:49:11,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 23:49:11,937 INFO L87 Difference]: Start difference. First operand 74 states and 100 transitions. Second operand 4 states. [2019-10-14 23:49:14,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:49:14,347 INFO L93 Difference]: Finished difference Result 147 states and 202 transitions. [2019-10-14 23:49:14,348 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 23:49:14,348 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2019-10-14 23:49:14,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:49:14,351 INFO L225 Difference]: With dead ends: 147 [2019-10-14 23:49:14,351 INFO L226 Difference]: Without dead ends: 80 [2019-10-14 23:49:14,352 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 23:49:14,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2019-10-14 23:49:14,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 75. [2019-10-14 23:49:14,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2019-10-14 23:49:14,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 101 transitions. [2019-10-14 23:49:14,365 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 101 transitions. Word has length 21 [2019-10-14 23:49:14,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:49:14,366 INFO L462 AbstractCegarLoop]: Abstraction has 75 states and 101 transitions. [2019-10-14 23:49:14,366 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 23:49:14,366 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 101 transitions. [2019-10-14 23:49:14,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-10-14 23:49:14,367 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:49:14,367 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 23:49:14,367 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:49:14,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:49:14,368 INFO L82 PathProgramCache]: Analyzing trace with hash -406679793, now seen corresponding path program 1 times [2019-10-14 23:49:14,368 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:49:14,368 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609029804] [2019-10-14 23:49:14,368 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:49:14,368 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:49:14,369 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:49:14,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:49:14,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:49:14,620 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 23:49:14,620 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609029804] [2019-10-14 23:49:14,621 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:49:14,621 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-14 23:49:14,621 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012958658] [2019-10-14 23:49:14,622 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 23:49:14,622 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:49:14,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 23:49:14,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-10-14 23:49:14,623 INFO L87 Difference]: Start difference. First operand 75 states and 101 transitions. Second operand 6 states. [2019-10-14 23:49:17,087 WARN L191 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 108 [2019-10-14 23:49:17,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:49:17,609 INFO L93 Difference]: Finished difference Result 143 states and 201 transitions. [2019-10-14 23:49:17,610 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 23:49:17,610 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 23 [2019-10-14 23:49:17,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:49:17,613 INFO L225 Difference]: With dead ends: 143 [2019-10-14 23:49:17,613 INFO L226 Difference]: Without dead ends: 135 [2019-10-14 23:49:17,614 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-10-14 23:49:17,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2019-10-14 23:49:17,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 129. [2019-10-14 23:49:17,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2019-10-14 23:49:17,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 182 transitions. [2019-10-14 23:49:17,659 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 182 transitions. Word has length 23 [2019-10-14 23:49:17,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:49:17,659 INFO L462 AbstractCegarLoop]: Abstraction has 129 states and 182 transitions. [2019-10-14 23:49:17,659 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-14 23:49:17,659 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 182 transitions. [2019-10-14 23:49:17,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2019-10-14 23:49:17,667 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:49:17,667 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] [2019-10-14 23:49:17,667 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:49:17,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:49:17,668 INFO L82 PathProgramCache]: Analyzing trace with hash 1197646543, now seen corresponding path program 1 times [2019-10-14 23:49:17,668 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:49:17,669 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222701934] [2019-10-14 23:49:17,669 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:49:17,669 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:49:17,669 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:49:17,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:49:17,948 WARN L191 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2019-10-14 23:49:17,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:49:18,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:49:18,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:49:18,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:49:18,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:49:18,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:49:18,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:49:18,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:49:18,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:49:18,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:49:18,591 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-10-14 23:49:18,592 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222701934] [2019-10-14 23:49:18,592 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1906841689] [2019-10-14 23:49:18,592 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 23:49:18,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:49:18,860 INFO L256 TraceCheckSpWp]: Trace formula consists of 837 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-14 23:49:18,876 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:49:18,966 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-10-14 23:49:18,966 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:49:18,967 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 4] total 22 [2019-10-14 23:49:18,967 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882982399] [2019-10-14 23:49:18,968 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-10-14 23:49:18,968 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:49:18,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-10-14 23:49:18,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2019-10-14 23:49:18,969 INFO L87 Difference]: Start difference. First operand 129 states and 182 transitions. Second operand 22 states. [2019-10-14 23:49:19,110 WARN L191 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2019-10-14 23:49:19,388 WARN L191 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 111 [2019-10-14 23:49:38,473 WARN L191 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 117 [2019-10-14 23:49:38,990 WARN L191 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2019-10-14 23:49:39,212 WARN L191 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2019-10-14 23:49:39,688 WARN L191 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2019-10-14 23:49:40,377 WARN L191 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2019-10-14 23:49:40,794 WARN L191 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2019-10-14 23:49:41,429 WARN L191 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2019-10-14 23:49:42,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:49:42,019 INFO L93 Difference]: Finished difference Result 414 states and 627 transitions. [2019-10-14 23:49:42,020 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2019-10-14 23:49:42,020 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 80 [2019-10-14 23:49:42,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:49:42,026 INFO L225 Difference]: With dead ends: 414 [2019-10-14 23:49:42,026 INFO L226 Difference]: Without dead ends: 292 [2019-10-14 23:49:42,029 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 666 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=431, Invalid=2761, Unknown=0, NotChecked=0, Total=3192 [2019-10-14 23:49:42,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2019-10-14 23:49:42,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 264. [2019-10-14 23:49:42,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 264 states. [2019-10-14 23:49:42,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 388 transitions. [2019-10-14 23:49:42,076 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 388 transitions. Word has length 80 [2019-10-14 23:49:42,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:49:42,076 INFO L462 AbstractCegarLoop]: Abstraction has 264 states and 388 transitions. [2019-10-14 23:49:42,076 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-10-14 23:49:42,077 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 388 transitions. [2019-10-14 23:49:42,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2019-10-14 23:49:42,080 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:49:42,080 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] [2019-10-14 23:49:42,291 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:49:42,292 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:49:42,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:49:42,292 INFO L82 PathProgramCache]: Analyzing trace with hash 1436320174, now seen corresponding path program 1 times [2019-10-14 23:49:42,292 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:49:42,293 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943825064] [2019-10-14 23:49:42,293 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:49:42,293 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:49:42,293 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:49:42,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:49:42,598 WARN L191 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2019-10-14 23:49:42,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:49:42,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:49:42,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:49:42,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:49:42,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:49:43,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:49:43,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:49:43,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:49:43,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:49:43,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:49:43,270 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-10-14 23:49:43,271 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943825064] [2019-10-14 23:49:43,271 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [527496784] [2019-10-14 23:49:43,271 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 23:49:43,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:49:43,517 INFO L256 TraceCheckSpWp]: Trace formula consists of 854 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 23:49:43,522 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:49:43,607 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-10-14 23:49:43,607 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:49:43,607 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 5] total 23 [2019-10-14 23:49:43,608 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518680199] [2019-10-14 23:49:43,610 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-10-14 23:49:43,610 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:49:43,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-10-14 23:49:43,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=449, Unknown=0, NotChecked=0, Total=506 [2019-10-14 23:49:43,613 INFO L87 Difference]: Start difference. First operand 264 states and 388 transitions. Second operand 23 states. [2019-10-14 23:49:43,752 WARN L191 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2019-10-14 23:49:43,985 WARN L191 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 111