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_peterson.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 23:48:59,231 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 23:48:59,234 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 23:48:59,252 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 23:48:59,253 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 23:48:59,254 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 23:48:59,256 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 23:48:59,266 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 23:48:59,270 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 23:48:59,273 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 23:48:59,275 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 23:48:59,277 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 23:48:59,277 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 23:48:59,279 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 23:48:59,282 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 23:48:59,283 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 23:48:59,285 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 23:48:59,286 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 23:48:59,287 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 23:48:59,292 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 23:48:59,297 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 23:48:59,299 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 23:48:59,302 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 23:48:59,303 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 23:48:59,305 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-14 23:48:59,305 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-14 23:48:59,305 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-14 23:48:59,307 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-14 23:48:59,308 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-14 23:48:59,309 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-14 23:48:59,309 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 23:48:59,310 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 23:48:59,312 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 23:48:59,312 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 23:48:59,314 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 23:48:59,314 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 23:48:59,315 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 23:48:59,315 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 23:48:59,315 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 23:48:59,316 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 23:48:59,318 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 23:48:59,319 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 23:48:59,345 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 23:48:59,346 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 23:48:59,347 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 23:48:59,347 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 23:48:59,347 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 23:48:59,347 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 23:48:59,348 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 23:48:59,348 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 23:48:59,348 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 23:48:59,348 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 23:48:59,348 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 23:48:59,349 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 23:48:59,349 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 23:48:59,349 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 23:48:59,349 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 23:48:59,349 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 23:48:59,350 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 23:48:59,350 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 23:48:59,350 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 23:48:59,350 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 23:48:59,351 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 23:48:59,351 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 23:48:59,351 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 23:48:59,351 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 23:48:59,351 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 23:48:59,352 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 23:48:59,352 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 23:48:59,352 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 23:48:59,352 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 23:48:59,619 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 23:48:59,629 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 23:48:59,638 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 23:48:59,639 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 23:48:59,639 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 23:48:59,640 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-pthread/cs_peterson.i [2019-10-14 23:48:59,715 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/849c07990/bcf78fea92f14bd6ad5f4f0d0da7192a/FLAG05d0a4206 [2019-10-14 23:49:00,272 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 23:49:00,273 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-pthread/cs_peterson.i [2019-10-14 23:49:00,288 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/849c07990/bcf78fea92f14bd6ad5f4f0d0da7192a/FLAG05d0a4206 [2019-10-14 23:49:00,556 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/849c07990/bcf78fea92f14bd6ad5f4f0d0da7192a [2019-10-14 23:49:00,566 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 23:49:00,568 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 23:49:00,569 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 23:49:00,569 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 23:49:00,573 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 23:49:00,574 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:49:00" (1/1) ... [2019-10-14 23:49:00,576 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1b72b8d9 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 23:49:00,577 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:49:00" (1/1) ... [2019-10-14 23:49:00,585 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 23:49:00,629 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 23:49:01,259 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:49:01,276 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 23:49:01,379 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:49:01,447 INFO L192 MainTranslator]: Completed translation [2019-10-14 23:49:01,448 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:49:01 WrapperNode [2019-10-14 23:49:01,448 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 23:49:01,449 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 23:49:01,449 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 23:49:01,449 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 23:49:01,461 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 23:49:01,461 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 23:49:01,490 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 23:49:01,490 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 23:49:01,549 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 23:49:01,558 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 23:49:01,564 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 23:49:01,575 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 23:49:01,576 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 23:49:01,576 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 23:49:01,576 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 23:49:01,577 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 23:49:01,644 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 23:49:01,645 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 23:49:01,645 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~$Pointer$ [2019-10-14 23:49:01,645 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2019-10-14 23:49:01,645 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2019-10-14 23:49:01,646 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2019-10-14 23:49:01,646 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2019-10-14 23:49:01,646 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2019-10-14 23:49:01,646 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-14 23:49:01,647 INFO L138 BoogieDeclarations]: Found implementation of procedure __CS_cs [2019-10-14 23:49:01,647 INFO L138 BoogieDeclarations]: Found implementation of procedure __CS_pthread_mutex_init [2019-10-14 23:49:01,647 INFO L138 BoogieDeclarations]: Found implementation of procedure __CS_pthread_mutex_destroy [2019-10-14 23:49:01,647 INFO L138 BoogieDeclarations]: Found implementation of procedure __CS_pthread_mutex_lock [2019-10-14 23:49:01,648 INFO L138 BoogieDeclarations]: Found implementation of procedure __CS_pthread_mutex_unlock [2019-10-14 23:49:01,648 INFO L138 BoogieDeclarations]: Found implementation of procedure __CS_pthread_cond_init [2019-10-14 23:49:01,648 INFO L138 BoogieDeclarations]: Found implementation of procedure __CS_pthread_cond_signal [2019-10-14 23:49:01,648 INFO L138 BoogieDeclarations]: Found implementation of procedure __CS_pthread_cond_broadcast [2019-10-14 23:49:01,649 INFO L138 BoogieDeclarations]: Found implementation of procedure __CS_pthread_cond_wait [2019-10-14 23:49:01,649 INFO L138 BoogieDeclarations]: Found implementation of procedure __CS_assert [2019-10-14 23:49:01,649 INFO L138 BoogieDeclarations]: Found implementation of procedure __CS_assume [2019-10-14 23:49:01,649 INFO L138 BoogieDeclarations]: Found implementation of procedure __CS_pthread_join [2019-10-14 23:49:01,650 INFO L138 BoogieDeclarations]: Found implementation of procedure __CS_pthread_create [2019-10-14 23:49:01,650 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2019-10-14 23:49:01,650 INFO L138 BoogieDeclarations]: Found implementation of procedure thr2 [2019-10-14 23:49:01,650 INFO L138 BoogieDeclarations]: Found implementation of procedure main_thread [2019-10-14 23:49:01,650 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 23:49:01,651 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 23:49:01,651 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_pointer [2019-10-14 23:49:01,651 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2019-10-14 23:49:01,651 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-10-14 23:49:01,652 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 23:49:01,652 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2019-10-14 23:49:01,652 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2019-10-14 23:49:01,652 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2019-10-14 23:49:01,652 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2019-10-14 23:49:01,653 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2019-10-14 23:49:01,653 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2019-10-14 23:49:01,653 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2019-10-14 23:49:01,653 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2019-10-14 23:49:01,654 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2019-10-14 23:49:01,654 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2019-10-14 23:49:01,654 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2019-10-14 23:49:01,654 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2019-10-14 23:49:01,655 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2019-10-14 23:49:01,655 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2019-10-14 23:49:01,655 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2019-10-14 23:49:01,655 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2019-10-14 23:49:01,655 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2019-10-14 23:49:01,656 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2019-10-14 23:49:01,656 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2019-10-14 23:49:01,656 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2019-10-14 23:49:01,656 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2019-10-14 23:49:01,656 INFO L130 BoogieDeclarations]: Found specification of procedure select [2019-10-14 23:49:01,657 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2019-10-14 23:49:01,657 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2019-10-14 23:49:01,657 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2019-10-14 23:49:01,657 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2019-10-14 23:49:01,657 INFO L130 BoogieDeclarations]: Found specification of procedure random [2019-10-14 23:49:01,657 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2019-10-14 23:49:01,658 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2019-10-14 23:49:01,658 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2019-10-14 23:49:01,658 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2019-10-14 23:49:01,658 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2019-10-14 23:49:01,658 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2019-10-14 23:49:01,659 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2019-10-14 23:49:01,659 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2019-10-14 23:49:01,659 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2019-10-14 23:49:01,659 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2019-10-14 23:49:01,659 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2019-10-14 23:49:01,660 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2019-10-14 23:49:01,660 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2019-10-14 23:49:01,660 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2019-10-14 23:49:01,660 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2019-10-14 23:49:01,660 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2019-10-14 23:49:01,661 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2019-10-14 23:49:01,661 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2019-10-14 23:49:01,661 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2019-10-14 23:49:01,661 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2019-10-14 23:49:01,662 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2019-10-14 23:49:01,662 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2019-10-14 23:49:01,662 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2019-10-14 23:49:01,662 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2019-10-14 23:49:01,662 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2019-10-14 23:49:01,662 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2019-10-14 23:49:01,663 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2019-10-14 23:49:01,663 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2019-10-14 23:49:01,663 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-10-14 23:49:01,663 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2019-10-14 23:49:01,663 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2019-10-14 23:49:01,664 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-10-14 23:49:01,664 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2019-10-14 23:49:01,664 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2019-10-14 23:49:01,664 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2019-10-14 23:49:01,664 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2019-10-14 23:49:01,664 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2019-10-14 23:49:01,665 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2019-10-14 23:49:01,665 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2019-10-14 23:49:01,665 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2019-10-14 23:49:01,665 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-14 23:49:01,665 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2019-10-14 23:49:01,666 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2019-10-14 23:49:01,666 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2019-10-14 23:49:01,666 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2019-10-14 23:49:01,666 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2019-10-14 23:49:01,666 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2019-10-14 23:49:01,666 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2019-10-14 23:49:01,667 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2019-10-14 23:49:01,667 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2019-10-14 23:49:01,667 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2019-10-14 23:49:01,667 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2019-10-14 23:49:01,667 INFO L130 BoogieDeclarations]: Found specification of procedure system [2019-10-14 23:49:01,667 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2019-10-14 23:49:01,668 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2019-10-14 23:49:01,668 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2019-10-14 23:49:01,668 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2019-10-14 23:49:01,668 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2019-10-14 23:49:01,668 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2019-10-14 23:49:01,668 INFO L130 BoogieDeclarations]: Found specification of procedure div [2019-10-14 23:49:01,669 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2019-10-14 23:49:01,669 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2019-10-14 23:49:01,669 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2019-10-14 23:49:01,669 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2019-10-14 23:49:01,669 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2019-10-14 23:49:01,670 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2019-10-14 23:49:01,670 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2019-10-14 23:49:01,670 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2019-10-14 23:49:01,670 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2019-10-14 23:49:01,670 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2019-10-14 23:49:01,671 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2019-10-14 23:49:01,671 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2019-10-14 23:49:01,671 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2019-10-14 23:49:01,671 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2019-10-14 23:49:01,671 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2019-10-14 23:49:01,671 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2019-10-14 23:49:01,672 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2019-10-14 23:49:01,672 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2019-10-14 23:49:01,672 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2019-10-14 23:49:01,672 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2019-10-14 23:49:01,672 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2019-10-14 23:49:01,673 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2019-10-14 23:49:01,673 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2019-10-14 23:49:01,673 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-14 23:49:01,673 INFO L130 BoogieDeclarations]: Found specification of procedure __CS_cs [2019-10-14 23:49:01,673 INFO L130 BoogieDeclarations]: Found specification of procedure __CS_pthread_mutex_init [2019-10-14 23:49:01,674 INFO L130 BoogieDeclarations]: Found specification of procedure __CS_pthread_mutex_destroy [2019-10-14 23:49:01,674 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-14 23:49:01,674 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-14 23:49:01,674 INFO L130 BoogieDeclarations]: Found specification of procedure __CS_pthread_mutex_lock [2019-10-14 23:49:01,674 INFO L130 BoogieDeclarations]: Found specification of procedure __CS_pthread_mutex_unlock [2019-10-14 23:49:01,674 INFO L130 BoogieDeclarations]: Found specification of procedure __CS_pthread_cond_init [2019-10-14 23:49:01,675 INFO L130 BoogieDeclarations]: Found specification of procedure __CS_pthread_cond_signal [2019-10-14 23:49:01,675 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-10-14 23:49:01,675 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-10-14 23:49:01,675 INFO L130 BoogieDeclarations]: Found specification of procedure __CS_pthread_cond_broadcast [2019-10-14 23:49:01,675 INFO L130 BoogieDeclarations]: Found specification of procedure __CS_pthread_cond_wait [2019-10-14 23:49:01,676 INFO L130 BoogieDeclarations]: Found specification of procedure __CS_assert [2019-10-14 23:49:01,676 INFO L130 BoogieDeclarations]: Found specification of procedure __CS_assume [2019-10-14 23:49:01,676 INFO L130 BoogieDeclarations]: Found specification of procedure __CS_pthread_join [2019-10-14 23:49:01,676 INFO L130 BoogieDeclarations]: Found specification of procedure __CS_pthread_create [2019-10-14 23:49:01,676 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2019-10-14 23:49:01,676 INFO L130 BoogieDeclarations]: Found specification of procedure thr2 [2019-10-14 23:49:01,677 INFO L130 BoogieDeclarations]: Found specification of procedure main_thread [2019-10-14 23:49:01,677 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-14 23:49:01,677 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-10-14 23:49:01,677 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-14 23:49:01,677 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 23:49:01,677 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~$Pointer$ [2019-10-14 23:49:01,678 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 23:49:01,678 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2019-10-14 23:49:01,678 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 23:49:02,392 INFO L685 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##29: assume !(0 != ~__CS_ret~0 % 256); [2019-10-14 23:49:02,392 INFO L685 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##28: assume 0 != ~__CS_ret~0 % 256;#res.base, #res.offset := 0, 0; [2019-10-14 23:49:02,458 INFO L685 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##29: assume !(0 != ~__CS_ret~0 % 256); [2019-10-14 23:49:02,458 INFO L685 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##28: assume 0 != ~__CS_ret~0 % 256;#res.base, #res.offset := 0, 0; [2019-10-14 23:49:05,075 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 23:49:05,075 INFO L284 CfgBuilder]: Removed 6 assume(true) statements. [2019-10-14 23:49:05,077 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:49:05 BoogieIcfgContainer [2019-10-14 23:49:05,077 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 23:49:05,078 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 23:49:05,078 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 23:49:05,082 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 23:49:05,082 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 11:49:00" (1/3) ... [2019-10-14 23:49:05,083 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@823a038 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 23:49:05,084 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 23:49:05,084 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@823a038 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 23:49:05,084 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 23:49:05,086 INFO L109 eAbstractionObserver]: Analyzing ICFG cs_peterson.i [2019-10-14 23:49:05,097 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 23:49:05,105 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 23:49:05,117 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 23:49:05,144 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 23:49:05,145 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 23:49:05,145 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 23:49:05,145 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 23:49:05,145 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 23:49:05,145 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 23:49:05,146 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 23:49:05,146 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 23:49:05,168 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states. [2019-10-14 23:49:05,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-10-14 23:49:05,175 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:49:05,176 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 23:49:05,178 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:49:05,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:49:05,184 INFO L82 PathProgramCache]: Analyzing trace with hash -689797084, now seen corresponding path program 1 times [2019-10-14 23:49:05,193 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:49:05,194 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350934119] [2019-10-14 23:49:05,194 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:49:05,194 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:49:05,195 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:49:05,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:49:05,774 WARN L191 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2019-10-14 23:49:05,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:49:05,848 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:49:05,852 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350934119] [2019-10-14 23:49:05,853 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:49:05,853 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 23:49:05,854 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384778590] [2019-10-14 23:49:05,863 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 23:49:05,864 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:49:05,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 23:49:05,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 23:49:05,881 INFO L87 Difference]: Start difference. First operand 136 states. Second operand 4 states. [2019-10-14 23:49:08,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:49:08,477 INFO L93 Difference]: Finished difference Result 162 states and 227 transitions. [2019-10-14 23:49:08,477 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 23:49:08,479 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2019-10-14 23:49:08,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:49:08,492 INFO L225 Difference]: With dead ends: 162 [2019-10-14 23:49:08,492 INFO L226 Difference]: Without dead ends: 81 [2019-10-14 23:49:08,496 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 23:49:08,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2019-10-14 23:49:08,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 74. [2019-10-14 23:49:08,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2019-10-14 23:49:08,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 100 transitions. [2019-10-14 23:49:08,580 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 100 transitions. Word has length 18 [2019-10-14 23:49:08,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:49:08,580 INFO L462 AbstractCegarLoop]: Abstraction has 74 states and 100 transitions. [2019-10-14 23:49:08,580 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 23:49:08,581 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 100 transitions. [2019-10-14 23:49:08,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-10-14 23:49:08,585 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:49:08,585 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 23:49:08,586 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:49:08,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:49:08,587 INFO L82 PathProgramCache]: Analyzing trace with hash -1168450643, now seen corresponding path program 1 times [2019-10-14 23:49:08,587 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:49:08,587 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888003699] [2019-10-14 23:49:08,587 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:49:08,587 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:49:08,588 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:49:08,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:49:08,873 WARN L191 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2019-10-14 23:49:08,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:49:08,892 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 23:49:08,893 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888003699] [2019-10-14 23:49:08,893 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:49:08,893 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 23:49:08,893 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365268979] [2019-10-14 23:49:08,895 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 23:49:08,895 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:49:08,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 23:49:08,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 23:49:08,896 INFO L87 Difference]: Start difference. First operand 74 states and 100 transitions. Second operand 4 states. [2019-10-14 23:49:11,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:49:11,311 INFO L93 Difference]: Finished difference Result 147 states and 202 transitions. [2019-10-14 23:49:11,312 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 23:49:11,312 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2019-10-14 23:49:11,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:49:11,317 INFO L225 Difference]: With dead ends: 147 [2019-10-14 23:49:11,317 INFO L226 Difference]: Without dead ends: 80 [2019-10-14 23:49:11,319 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 23:49:11,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2019-10-14 23:49:11,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 75. [2019-10-14 23:49:11,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2019-10-14 23:49:11,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 101 transitions. [2019-10-14 23:49:11,350 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 101 transitions. Word has length 21 [2019-10-14 23:49:11,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:49:11,350 INFO L462 AbstractCegarLoop]: Abstraction has 75 states and 101 transitions. [2019-10-14 23:49:11,352 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 23:49:11,353 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 101 transitions. [2019-10-14 23:49:11,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-10-14 23:49:11,354 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:49:11,354 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 23:49:11,354 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:49:11,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:49:11,355 INFO L82 PathProgramCache]: Analyzing trace with hash 301605135, now seen corresponding path program 1 times [2019-10-14 23:49:11,355 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:49:11,355 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865381196] [2019-10-14 23:49:11,355 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:49:11,356 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:49:11,356 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:49:11,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:49:11,729 WARN L191 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2019-10-14 23:49:11,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:49:11,753 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 23:49:11,753 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865381196] [2019-10-14 23:49:11,754 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:49:11,754 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-14 23:49:11,754 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021973895] [2019-10-14 23:49:11,755 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 23:49:11,755 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:49:11,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 23:49:11,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-10-14 23:49:11,756 INFO L87 Difference]: Start difference. First operand 75 states and 101 transitions. Second operand 6 states. [2019-10-14 23:49:11,916 WARN L191 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 111 [2019-10-14 23:49:14,222 WARN L191 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 114 [2019-10-14 23:49:14,390 WARN L191 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 117 [2019-10-14 23:49:14,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:49:14,987 INFO L93 Difference]: Finished difference Result 143 states and 201 transitions. [2019-10-14 23:49:14,990 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 23:49:14,990 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 23 [2019-10-14 23:49:14,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:49:14,993 INFO L225 Difference]: With dead ends: 143 [2019-10-14 23:49:14,993 INFO L226 Difference]: Without dead ends: 135 [2019-10-14 23:49:14,994 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-10-14 23:49:14,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2019-10-14 23:49:15,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 129. [2019-10-14 23:49:15,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2019-10-14 23:49:15,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 182 transitions. [2019-10-14 23:49:15,021 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 182 transitions. Word has length 23 [2019-10-14 23:49:15,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:49:15,021 INFO L462 AbstractCegarLoop]: Abstraction has 129 states and 182 transitions. [2019-10-14 23:49:15,021 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-14 23:49:15,021 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 182 transitions. [2019-10-14 23:49:15,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2019-10-14 23:49:15,025 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:49:15,025 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 23:49:15,026 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:49:15,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:49:15,026 INFO L82 PathProgramCache]: Analyzing trace with hash -1526536865, now seen corresponding path program 1 times [2019-10-14 23:49:15,026 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:49:15,027 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768459950] [2019-10-14 23:49:15,027 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:49:15,027 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:49:15,027 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:49:15,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:49:15,379 WARN L191 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2019-10-14 23:49:15,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:49:15,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:49:15,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:49:15,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:49:15,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:49:15,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:49:15,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:49:15,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:49:15,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:49:15,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:49:15,976 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 23:49:15,977 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768459950] [2019-10-14 23:49:15,977 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247588704] [2019-10-14 23:49:15,978 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 23:49:16,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:49:16,243 INFO L256 TraceCheckSpWp]: Trace formula consists of 876 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-14 23:49:16,254 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:49:16,353 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 23:49:16,354 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:49:16,354 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 4] total 22 [2019-10-14 23:49:16,354 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655809994] [2019-10-14 23:49:16,356 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-10-14 23:49:16,356 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:49:16,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-10-14 23:49:16,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2019-10-14 23:49:16,357 INFO L87 Difference]: Start difference. First operand 129 states and 182 transitions. Second operand 22 states. [2019-10-14 23:49:16,530 WARN L191 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2019-10-14 23:49:16,864 WARN L191 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 120 [2019-10-14 23:49:27,862 WARN L191 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 126 [2019-10-14 23:49:28,397 WARN L191 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2019-10-14 23:49:28,616 WARN L191 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2019-10-14 23:49:29,056 WARN L191 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2019-10-14 23:49:29,765 WARN L191 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2019-10-14 23:49:30,131 WARN L191 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-10-14 23:49:30,743 WARN L191 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2019-10-14 23:49:31,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:49:31,387 INFO L93 Difference]: Finished difference Result 414 states and 627 transitions. [2019-10-14 23:49:31,387 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2019-10-14 23:49:31,387 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 80 [2019-10-14 23:49:31,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:49:31,393 INFO L225 Difference]: With dead ends: 414 [2019-10-14 23:49:31,394 INFO L226 Difference]: Without dead ends: 292 [2019-10-14 23:49:31,398 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 634 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=415, Invalid=2665, Unknown=0, NotChecked=0, Total=3080 [2019-10-14 23:49:31,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2019-10-14 23:49:31,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 264. [2019-10-14 23:49:31,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 264 states. [2019-10-14 23:49:31,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 388 transitions. [2019-10-14 23:49:31,448 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 388 transitions. Word has length 80 [2019-10-14 23:49:31,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:49:31,448 INFO L462 AbstractCegarLoop]: Abstraction has 264 states and 388 transitions. [2019-10-14 23:49:31,448 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-10-14 23:49:31,449 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 388 transitions. [2019-10-14 23:49:31,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2019-10-14 23:49:31,452 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:49:31,453 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 23:49:31,658 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:49:31,659 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:49:31,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:49:31,660 INFO L82 PathProgramCache]: Analyzing trace with hash -1865288514, now seen corresponding path program 1 times [2019-10-14 23:49:31,660 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:49:31,660 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695488314] [2019-10-14 23:49:31,661 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:49:31,661 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:49:31,662 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:49:31,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:49:31,950 WARN L191 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2019-10-14 23:49:31,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:49:32,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:49:32,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:49:32,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:49:32,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:49:32,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:49:32,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:49:32,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:49:32,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:49:32,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:49:32,593 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 23:49:32,593 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695488314] [2019-10-14 23:49:32,594 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688043408] [2019-10-14 23:49:32,594 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 23:49:32,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:49:32,918 INFO L256 TraceCheckSpWp]: Trace formula consists of 893 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 23:49:32,925 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:49:32,990 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 23:49:32,991 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:49:32,991 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 5] total 23 [2019-10-14 23:49:32,991 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350677973] [2019-10-14 23:49:32,992 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-10-14 23:49:32,992 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:49:32,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-10-14 23:49:32,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=449, Unknown=0, NotChecked=0, Total=506 [2019-10-14 23:49:32,993 INFO L87 Difference]: Start difference. First operand 264 states and 388 transitions. Second operand 23 states. [2019-10-14 23:49:33,163 WARN L191 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2019-10-14 23:49:33,423 WARN L191 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 120