/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=DEEPEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/heap-data/shared_mem1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 19:51:00,315 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 19:51:00,318 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 19:51:00,367 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 19:51:00,368 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 19:51:00,375 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 19:51:00,378 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 19:51:00,383 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 19:51:00,387 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 19:51:00,393 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 19:51:00,394 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 19:51:00,395 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 19:51:00,395 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 19:51:00,397 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 19:51:00,398 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 19:51:00,399 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 19:51:00,400 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 19:51:00,401 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 19:51:00,414 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 19:51:00,419 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 19:51:00,421 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 19:51:00,425 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 19:51:00,429 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 19:51:00,430 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 19:51:00,437 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 19:51:00,438 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 19:51:00,439 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 19:51:00,441 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 19:51:00,442 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 19:51:00,443 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 19:51:00,443 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 19:51:00,444 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 19:51:00,446 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 19:51:00,447 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 19:51:00,448 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 19:51:00,448 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 19:51:00,449 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 19:51:00,449 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 19:51:00,450 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 19:51:00,451 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 19:51:00,451 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 19:51:00,459 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-27 19:51:00,510 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 19:51:00,511 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 19:51:00,515 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 19:51:00,515 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 19:51:00,515 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 19:51:00,516 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 19:51:00,516 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 19:51:00,516 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 19:51:00,517 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 19:51:00,517 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 19:51:00,518 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 19:51:00,519 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 19:51:00,519 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 19:51:00,519 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 19:51:00,519 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 19:51:00,520 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 19:51:00,520 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 19:51:00,520 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 19:51:00,520 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 19:51:00,520 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 19:51:00,521 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 19:51:00,521 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 19:51:00,521 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 19:51:00,521 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 19:51:00,521 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 19:51:00,522 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 19:51:00,522 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 19:51:00,522 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 19:51:00,522 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 19:51:00,522 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 19:51:00,907 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 19:51:00,944 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 19:51:00,949 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 19:51:00,950 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 19:51:00,951 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 19:51:00,952 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/heap-data/shared_mem1.i [2020-10-27 19:51:01,042 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9b6258251/d4d8e63db93a4f51887a074bdb794e89/FLAGfb73b3fa2 [2020-10-27 19:51:01,681 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 19:51:01,682 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/heap-data/shared_mem1.i [2020-10-27 19:51:01,700 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9b6258251/d4d8e63db93a4f51887a074bdb794e89/FLAGfb73b3fa2 [2020-10-27 19:51:01,982 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9b6258251/d4d8e63db93a4f51887a074bdb794e89 [2020-10-27 19:51:01,988 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 19:51:01,997 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 19:51:02,002 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 19:51:02,002 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 19:51:02,006 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 19:51:02,007 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 07:51:01" (1/1) ... [2020-10-27 19:51:02,018 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ae1b39a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:51:02, skipping insertion in model container [2020-10-27 19:51:02,019 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 07:51:01" (1/1) ... [2020-10-27 19:51:02,030 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 19:51:02,096 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 19:51:02,424 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 19:51:02,437 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 19:51:02,485 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 19:51:02,554 INFO L208 MainTranslator]: Completed translation [2020-10-27 19:51:02,555 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:51:02 WrapperNode [2020-10-27 19:51:02,555 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 19:51:02,556 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 19:51:02,557 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 19:51:02,557 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 19:51:02,574 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:51:02" (1/1) ... [2020-10-27 19:51:02,574 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:51:02" (1/1) ... [2020-10-27 19:51:02,593 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:51:02" (1/1) ... [2020-10-27 19:51:02,594 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:51:02" (1/1) ... [2020-10-27 19:51:02,613 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:51:02" (1/1) ... [2020-10-27 19:51:02,618 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:51:02" (1/1) ... [2020-10-27 19:51:02,623 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:51:02" (1/1) ... [2020-10-27 19:51:02,630 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 19:51:02,632 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 19:51:02,632 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 19:51:02,632 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 19:51:02,633 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:51:02" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-27 19:51:02,744 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 19:51:02,744 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 19:51:02,745 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 19:51:02,745 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-10-27 19:51:02,746 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-10-27 19:51:02,747 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 19:51:02,747 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 19:51:02,747 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 19:51:02,748 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 19:51:02,748 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-27 19:51:02,749 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-27 19:51:02,750 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 19:51:02,750 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 19:51:02,750 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-10-27 19:51:02,750 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-10-27 19:51:02,752 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-10-27 19:51:02,752 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-10-27 19:51:02,752 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-10-27 19:51:02,752 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-10-27 19:51:02,753 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-10-27 19:51:02,753 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-10-27 19:51:02,769 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-10-27 19:51:02,772 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-10-27 19:51:02,773 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-10-27 19:51:02,773 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-10-27 19:51:02,773 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-10-27 19:51:02,773 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-10-27 19:51:02,774 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-10-27 19:51:02,774 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-10-27 19:51:02,774 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-10-27 19:51:02,774 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-10-27 19:51:02,774 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-10-27 19:51:02,775 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-10-27 19:51:02,775 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-10-27 19:51:02,775 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-10-27 19:51:02,776 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-10-27 19:51:02,776 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-10-27 19:51:02,776 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-10-27 19:51:02,776 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-10-27 19:51:02,776 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-10-27 19:51:02,777 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-10-27 19:51:02,777 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-10-27 19:51:02,777 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-10-27 19:51:02,777 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-10-27 19:51:02,777 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-10-27 19:51:02,778 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-10-27 19:51:02,778 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-10-27 19:51:02,778 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-10-27 19:51:02,778 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-10-27 19:51:02,778 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-10-27 19:51:02,778 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-10-27 19:51:02,779 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-10-27 19:51:02,779 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-10-27 19:51:02,780 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-10-27 19:51:02,780 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-10-27 19:51:02,781 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-10-27 19:51:02,781 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-10-27 19:51:02,781 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-10-27 19:51:02,782 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-10-27 19:51:02,782 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-10-27 19:51:02,782 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-10-27 19:51:02,783 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-10-27 19:51:02,783 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-10-27 19:51:02,783 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-10-27 19:51:02,783 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-10-27 19:51:02,783 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-27 19:51:02,783 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-27 19:51:02,783 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-10-27 19:51:02,784 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-27 19:51:02,784 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-10-27 19:51:02,785 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-10-27 19:51:02,785 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-10-27 19:51:02,787 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-10-27 19:51:02,788 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-10-27 19:51:02,788 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-10-27 19:51:02,789 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-10-27 19:51:02,789 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-10-27 19:51:02,789 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-27 19:51:02,789 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-10-27 19:51:02,790 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-10-27 19:51:02,790 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-10-27 19:51:02,790 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-10-27 19:51:02,792 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-10-27 19:51:02,792 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-10-27 19:51:02,792 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-10-27 19:51:02,792 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-10-27 19:51:02,793 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-10-27 19:51:02,793 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-10-27 19:51:02,793 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-10-27 19:51:02,793 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-10-27 19:51:02,794 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-10-27 19:51:02,794 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-10-27 19:51:02,794 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-10-27 19:51:02,794 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-10-27 19:51:02,795 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-10-27 19:51:02,795 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-10-27 19:51:02,795 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-10-27 19:51:02,795 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-10-27 19:51:02,796 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-10-27 19:51:02,796 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-10-27 19:51:02,796 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-10-27 19:51:02,796 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-10-27 19:51:02,797 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-10-27 19:51:02,797 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-10-27 19:51:02,797 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-10-27 19:51:02,797 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-10-27 19:51:02,798 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-10-27 19:51:02,798 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-10-27 19:51:02,798 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-10-27 19:51:02,798 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-10-27 19:51:02,798 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-10-27 19:51:02,799 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-10-27 19:51:02,799 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-10-27 19:51:02,799 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-10-27 19:51:02,799 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-10-27 19:51:02,800 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-10-27 19:51:02,801 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-10-27 19:51:02,801 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 19:51:02,803 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-27 19:51:02,803 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 19:51:02,803 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-27 19:51:02,803 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-27 19:51:02,804 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 19:51:02,804 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 19:51:02,804 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 19:51:02,804 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 19:51:02,805 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 19:51:03,663 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 19:51:03,663 INFO L298 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-27 19:51:03,665 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 07:51:03 BoogieIcfgContainer [2020-10-27 19:51:03,666 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 19:51:03,668 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 19:51:03,668 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 19:51:03,672 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 19:51:03,673 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 07:51:01" (1/3) ... [2020-10-27 19:51:03,673 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7af9c40f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 07:51:03, skipping insertion in model container [2020-10-27 19:51:03,674 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:51:02" (2/3) ... [2020-10-27 19:51:03,674 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7af9c40f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 07:51:03, skipping insertion in model container [2020-10-27 19:51:03,674 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 07:51:03" (3/3) ... [2020-10-27 19:51:03,676 INFO L111 eAbstractionObserver]: Analyzing ICFG shared_mem1.i [2020-10-27 19:51:03,691 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 19:51:03,698 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 19:51:03,714 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 19:51:03,744 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 19:51:03,744 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 19:51:03,744 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 19:51:03,744 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 19:51:03,745 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 19:51:03,745 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 19:51:03,745 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 19:51:03,745 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 19:51:03,766 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2020-10-27 19:51:03,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-27 19:51:03,776 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:51:03,777 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:51:03,777 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:51:03,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:51:03,784 INFO L82 PathProgramCache]: Analyzing trace with hash 270174809, now seen corresponding path program 1 times [2020-10-27 19:51:03,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:51:03,796 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [653751220] [2020-10-27 19:51:03,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:51:03,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:51:03,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:51:04,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:51:04,810 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:51:04,810 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-27 19:51:04,812 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 19:51:04,812 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 863 [2020-10-27 19:51:04,814 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:51:04,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:51:04,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 19:51:04,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:51:04,816 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 19:51:04,911 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:51:04,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:51:04,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:51:04,944 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:51:04,944 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:51:04,944 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:51:04,945 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-27 19:51:04,945 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:51:04,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:51:04,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:51:04,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:51:04,946 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:51:04,962 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:51:04,963 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [653751220] [2020-10-27 19:51:04,965 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 19:51:04,965 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-27 19:51:04,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749314262] [2020-10-27 19:51:04,972 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-27 19:51:04,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:51:04,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-27 19:51:04,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 19:51:04,998 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 3 states. [2020-10-27 19:51:05,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:51:05,139 INFO L93 Difference]: Finished difference Result 39 states and 53 transitions. [2020-10-27 19:51:05,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-27 19:51:05,141 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2020-10-27 19:51:05,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:51:05,151 INFO L225 Difference]: With dead ends: 39 [2020-10-27 19:51:05,152 INFO L226 Difference]: Without dead ends: 19 [2020-10-27 19:51:05,157 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 19:51:05,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-10-27 19:51:05,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-10-27 19:51:05,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-27 19:51:05,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2020-10-27 19:51:05,199 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 16 [2020-10-27 19:51:05,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:51:05,200 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2020-10-27 19:51:05,200 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-27 19:51:05,200 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2020-10-27 19:51:05,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-27 19:51:05,201 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:51:05,201 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:51:05,201 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 19:51:05,202 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:51:05,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:51:05,203 INFO L82 PathProgramCache]: Analyzing trace with hash -1458860047, now seen corresponding path program 1 times [2020-10-27 19:51:05,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:51:05,203 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [171618107] [2020-10-27 19:51:05,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:51:05,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:51:05,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:51:05,471 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:51:05,471 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-27 19:51:05,471 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:51:05,471 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 239 [2020-10-27 19:51:05,472 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:51:05,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 19:51:05,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:51:05,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-27 19:51:05,472 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:51:05,693 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 29 [2020-10-27 19:51:05,765 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:51:05,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:51:05,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:51:05,778 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:51:05,778 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:51:05,778 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:51:05,778 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 19:51:05,778 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:51:05,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:51:05,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:51:05,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:51:05,779 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:51:05,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:51:05,789 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [171618107] [2020-10-27 19:51:05,790 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 19:51:05,790 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 19:51:05,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402849592] [2020-10-27 19:51:05,792 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 19:51:05,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:51:05,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 19:51:05,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-27 19:51:05,798 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand 7 states. [2020-10-27 19:51:06,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:51:06,288 INFO L93 Difference]: Finished difference Result 36 states and 46 transitions. [2020-10-27 19:51:06,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 19:51:06,290 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 17 [2020-10-27 19:51:06,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:51:06,294 INFO L225 Difference]: With dead ends: 36 [2020-10-27 19:51:06,294 INFO L226 Difference]: Without dead ends: 32 [2020-10-27 19:51:06,295 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-10-27 19:51:06,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-27 19:51:06,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 28. [2020-10-27 19:51:06,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-27 19:51:06,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 36 transitions. [2020-10-27 19:51:06,305 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 36 transitions. Word has length 17 [2020-10-27 19:51:06,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:51:06,305 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 36 transitions. [2020-10-27 19:51:06,306 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 19:51:06,306 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 36 transitions. [2020-10-27 19:51:06,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-27 19:51:06,307 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:51:06,307 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:51:06,307 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 19:51:06,307 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:51:06,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:51:06,308 INFO L82 PathProgramCache]: Analyzing trace with hash -1457013005, now seen corresponding path program 1 times [2020-10-27 19:51:06,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:51:06,308 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1170372450] [2020-10-27 19:51:06,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:51:06,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:51:06,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:51:06,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:51:06,844 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:51:06,844 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-27 19:51:06,844 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 19:51:06,845 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 511 [2020-10-27 19:51:06,845 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:51:06,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 19:51:06,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:51:06,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-27 19:51:06,847 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 19:51:07,010 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:51:07,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:51:07,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:51:07,024 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:51:07,025 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:51:07,025 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:51:07,025 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 19:51:07,025 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:51:07,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:51:07,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:51:07,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:51:07,026 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:51:07,031 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:51:07,032 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1170372450] [2020-10-27 19:51:07,032 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 19:51:07,032 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 19:51:07,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414724283] [2020-10-27 19:51:07,035 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 19:51:07,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:51:07,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 19:51:07,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-27 19:51:07,037 INFO L87 Difference]: Start difference. First operand 28 states and 36 transitions. Second operand 7 states. [2020-10-27 19:51:07,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:51:07,429 INFO L93 Difference]: Finished difference Result 42 states and 54 transitions. [2020-10-27 19:51:07,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 19:51:07,429 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 17 [2020-10-27 19:51:07,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:51:07,431 INFO L225 Difference]: With dead ends: 42 [2020-10-27 19:51:07,431 INFO L226 Difference]: Without dead ends: 33 [2020-10-27 19:51:07,432 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-10-27 19:51:07,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-27 19:51:07,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 30. [2020-10-27 19:51:07,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-27 19:51:07,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 38 transitions. [2020-10-27 19:51:07,439 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 38 transitions. Word has length 17 [2020-10-27 19:51:07,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:51:07,440 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 38 transitions. [2020-10-27 19:51:07,440 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 19:51:07,440 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 38 transitions. [2020-10-27 19:51:07,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-27 19:51:07,441 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:51:07,441 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:51:07,442 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 19:51:07,442 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:51:07,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:51:07,442 INFO L82 PathProgramCache]: Analyzing trace with hash 317994357, now seen corresponding path program 1 times [2020-10-27 19:51:07,443 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:51:07,443 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1329387036] [2020-10-27 19:51:07,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:51:07,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:51:07,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:51:07,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:51:07,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:51:07,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:51:08,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:51:08,292 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:51:08,293 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-27 19:51:08,293 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 19:51:08,293 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 815 [2020-10-27 19:51:08,293 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:51:08,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 19:51:08,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:51:08,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-27 19:51:08,294 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:51:08,430 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:51:08,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:51:08,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:51:08,439 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:51:08,440 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:51:08,440 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:51:08,440 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 19:51:08,440 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:51:08,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:51:08,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:51:08,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:51:08,441 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:51:08,445 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:51:08,446 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1329387036] [2020-10-27 19:51:08,446 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 19:51:08,446 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 19:51:08,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488125246] [2020-10-27 19:51:08,447 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 19:51:08,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:51:08,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 19:51:08,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 19:51:08,449 INFO L87 Difference]: Start difference. First operand 30 states and 38 transitions. Second operand 6 states. [2020-10-27 19:51:08,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:51:08,721 INFO L93 Difference]: Finished difference Result 45 states and 58 transitions. [2020-10-27 19:51:08,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 19:51:08,722 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2020-10-27 19:51:08,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:51:08,723 INFO L225 Difference]: With dead ends: 45 [2020-10-27 19:51:08,723 INFO L226 Difference]: Without dead ends: 36 [2020-10-27 19:51:08,724 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-27 19:51:08,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-27 19:51:08,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2020-10-27 19:51:08,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-27 19:51:08,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 41 transitions. [2020-10-27 19:51:08,739 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 41 transitions. Word has length 17 [2020-10-27 19:51:08,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:51:08,740 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 41 transitions. [2020-10-27 19:51:08,740 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 19:51:08,740 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 41 transitions. [2020-10-27 19:51:08,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-27 19:51:08,741 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:51:08,741 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:51:08,741 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 19:51:08,742 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:51:08,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:51:08,742 INFO L82 PathProgramCache]: Analyzing trace with hash -1676333536, now seen corresponding path program 1 times [2020-10-27 19:51:08,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:51:08,743 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [402561682] [2020-10-27 19:51:08,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:51:08,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:51:08,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:51:09,202 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:51:09,203 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-27 19:51:09,203 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:51:09,203 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 430 [2020-10-27 19:51:09,203 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:51:09,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 19:51:09,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:51:09,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 19:51:09,204 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:51:09,402 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:51:09,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:51:09,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:51:09,414 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:51:09,414 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:51:09,414 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:51:09,415 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 19:51:09,415 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:51:09,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:51:09,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:51:09,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:51:09,415 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:51:09,421 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:51:09,421 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [402561682] [2020-10-27 19:51:09,421 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:51:09,421 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 19:51:09,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352517789] [2020-10-27 19:51:09,422 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 19:51:09,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:51:09,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 19:51:09,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-10-27 19:51:09,423 INFO L87 Difference]: Start difference. First operand 33 states and 41 transitions. Second operand 8 states. [2020-10-27 19:51:09,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:51:09,585 INFO L93 Difference]: Finished difference Result 51 states and 64 transitions. [2020-10-27 19:51:09,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 19:51:09,586 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 20 [2020-10-27 19:51:09,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:51:09,587 INFO L225 Difference]: With dead ends: 51 [2020-10-27 19:51:09,587 INFO L226 Difference]: Without dead ends: 47 [2020-10-27 19:51:09,588 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-10-27 19:51:09,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-27 19:51:09,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 37. [2020-10-27 19:51:09,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-27 19:51:09,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 47 transitions. [2020-10-27 19:51:09,596 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 47 transitions. Word has length 20 [2020-10-27 19:51:09,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:51:09,596 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 47 transitions. [2020-10-27 19:51:09,596 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 19:51:09,596 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 47 transitions. [2020-10-27 19:51:09,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-27 19:51:09,597 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:51:09,597 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:51:09,597 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 19:51:09,597 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:51:09,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:51:09,598 INFO L82 PathProgramCache]: Analyzing trace with hash -1674486494, now seen corresponding path program 1 times [2020-10-27 19:51:09,598 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:51:09,599 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [282022568] [2020-10-27 19:51:09,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:51:09,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:51:09,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:51:09,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:51:10,442 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:51:10,442 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-27 19:51:10,443 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 19:51:10,443 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 811 [2020-10-27 19:51:10,443 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:51:10,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 19:51:10,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:51:10,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 19:51:10,444 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:51:10,641 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:51:10,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:51:10,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:51:10,654 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:51:10,655 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:51:10,655 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:51:10,655 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 19:51:10,655 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:51:10,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:51:10,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:51:10,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:51:10,656 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:51:10,663 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:51:10,663 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [282022568] [2020-10-27 19:51:10,665 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:51:10,665 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 19:51:10,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314339058] [2020-10-27 19:51:10,665 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 19:51:10,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:51:10,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 19:51:10,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-27 19:51:10,667 INFO L87 Difference]: Start difference. First operand 37 states and 47 transitions. Second operand 8 states. [2020-10-27 19:51:10,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:51:10,845 INFO L93 Difference]: Finished difference Result 51 states and 65 transitions. [2020-10-27 19:51:10,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 19:51:10,847 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 20 [2020-10-27 19:51:10,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:51:10,848 INFO L225 Difference]: With dead ends: 51 [2020-10-27 19:51:10,849 INFO L226 Difference]: Without dead ends: 42 [2020-10-27 19:51:10,850 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-10-27 19:51:10,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-27 19:51:10,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 37. [2020-10-27 19:51:10,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-27 19:51:10,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 47 transitions. [2020-10-27 19:51:10,864 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 47 transitions. Word has length 20 [2020-10-27 19:51:10,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:51:10,865 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 47 transitions. [2020-10-27 19:51:10,865 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 19:51:10,865 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 47 transitions. [2020-10-27 19:51:10,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-27 19:51:10,869 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:51:10,869 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:51:10,869 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 19:51:10,869 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:51:10,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:51:10,870 INFO L82 PathProgramCache]: Analyzing trace with hash 100520868, now seen corresponding path program 1 times [2020-10-27 19:51:10,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:51:10,872 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1195289641] [2020-10-27 19:51:10,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:51:10,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:51:10,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:51:11,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:51:11,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:51:11,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:51:11,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:51:11,939 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:51:11,939 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-27 19:51:11,939 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 19:51:11,939 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1037 [2020-10-27 19:51:11,939 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:51:11,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 19:51:11,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:51:11,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 19:51:11,940 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:51:12,063 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:51:12,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:51:12,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:51:12,070 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:51:12,071 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:51:12,071 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:51:12,071 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 19:51:12,071 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:51:12,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:51:12,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:51:12,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:51:12,072 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:51:12,077 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:51:12,078 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1195289641] [2020-10-27 19:51:12,078 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:51:12,078 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 19:51:12,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996701051] [2020-10-27 19:51:12,079 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 19:51:12,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:51:12,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 19:51:12,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-27 19:51:12,080 INFO L87 Difference]: Start difference. First operand 37 states and 47 transitions. Second operand 7 states. [2020-10-27 19:51:12,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:51:12,307 INFO L93 Difference]: Finished difference Result 52 states and 67 transitions. [2020-10-27 19:51:12,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 19:51:12,307 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 20 [2020-10-27 19:51:12,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:51:12,309 INFO L225 Difference]: With dead ends: 52 [2020-10-27 19:51:12,309 INFO L226 Difference]: Without dead ends: 43 [2020-10-27 19:51:12,310 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-10-27 19:51:12,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-27 19:51:12,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 29. [2020-10-27 19:51:12,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-27 19:51:12,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2020-10-27 19:51:12,322 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 20 [2020-10-27 19:51:12,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:51:12,323 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2020-10-27 19:51:12,323 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 19:51:12,323 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2020-10-27 19:51:12,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-27 19:51:12,324 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:51:12,324 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:51:12,325 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 19:51:12,325 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:51:12,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:51:12,325 INFO L82 PathProgramCache]: Analyzing trace with hash 1030534352, now seen corresponding path program 1 times [2020-10-27 19:51:12,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:51:12,326 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1830151239] [2020-10-27 19:51:12,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:51:12,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:51:12,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:51:12,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:51:12,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:51:13,639 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:51:13,640 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-27 19:51:13,641 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 19:51:13,641 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1284 [2020-10-27 19:51:13,641 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:51:13,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 19:51:13,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:51:13,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-27 19:51:13,642 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:51:13,794 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:51:13,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:51:13,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:51:13,801 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:51:13,801 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:51:13,802 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:51:13,802 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 19:51:13,802 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:51:13,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:51:13,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:51:13,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:51:13,803 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:51:13,809 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:51:13,809 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1830151239] [2020-10-27 19:51:13,809 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:51:13,810 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 19:51:13,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455207422] [2020-10-27 19:51:13,810 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 19:51:13,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:51:13,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 19:51:13,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-27 19:51:13,819 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand 8 states. [2020-10-27 19:51:14,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:51:14,215 INFO L93 Difference]: Finished difference Result 49 states and 61 transitions. [2020-10-27 19:51:14,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 19:51:14,215 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 22 [2020-10-27 19:51:14,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:51:14,216 INFO L225 Difference]: With dead ends: 49 [2020-10-27 19:51:14,216 INFO L226 Difference]: Without dead ends: 40 [2020-10-27 19:51:14,217 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-27 19:51:14,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-27 19:51:14,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-10-27 19:51:14,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-27 19:51:14,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 49 transitions. [2020-10-27 19:51:14,232 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 49 transitions. Word has length 22 [2020-10-27 19:51:14,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:51:14,233 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 49 transitions. [2020-10-27 19:51:14,233 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 19:51:14,234 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 49 transitions. [2020-10-27 19:51:14,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-27 19:51:14,235 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:51:14,235 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:51:14,235 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 19:51:14,236 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:51:14,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:51:14,236 INFO L82 PathProgramCache]: Analyzing trace with hash -1489425582, now seen corresponding path program 1 times [2020-10-27 19:51:14,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:51:14,237 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1463158653] [2020-10-27 19:51:14,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:51:14,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:51:14,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:51:14,621 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:51:14,621 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-27 19:51:14,622 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:51:14,622 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 352 [2020-10-27 19:51:14,622 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:51:14,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 19:51:14,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:51:14,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 19:51:14,622 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:51:14,951 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:51:14,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:51:14,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:51:14,958 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:51:14,958 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:51:14,958 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:51:14,958 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 19:51:14,959 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:51:14,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:51:14,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:51:14,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:51:14,959 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:51:14,966 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:51:14,967 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1463158653] [2020-10-27 19:51:14,967 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:51:14,967 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 19:51:14,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115309718] [2020-10-27 19:51:14,968 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 19:51:14,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:51:14,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 19:51:14,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-10-27 19:51:14,969 INFO L87 Difference]: Start difference. First operand 40 states and 49 transitions. Second operand 9 states. [2020-10-27 19:51:15,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:51:15,486 INFO L93 Difference]: Finished difference Result 61 states and 75 transitions. [2020-10-27 19:51:15,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 19:51:15,487 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 22 [2020-10-27 19:51:15,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:51:15,488 INFO L225 Difference]: With dead ends: 61 [2020-10-27 19:51:15,488 INFO L226 Difference]: Without dead ends: 57 [2020-10-27 19:51:15,488 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2020-10-27 19:51:15,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-27 19:51:15,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 42. [2020-10-27 19:51:15,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-27 19:51:15,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 52 transitions. [2020-10-27 19:51:15,496 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 52 transitions. Word has length 22 [2020-10-27 19:51:15,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:51:15,496 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 52 transitions. [2020-10-27 19:51:15,496 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 19:51:15,496 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 52 transitions. [2020-10-27 19:51:15,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-27 19:51:15,497 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:51:15,497 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:51:15,497 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 19:51:15,498 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:51:15,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:51:15,498 INFO L82 PathProgramCache]: Analyzing trace with hash -1487578540, now seen corresponding path program 1 times [2020-10-27 19:51:15,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:51:15,498 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [385246611] [2020-10-27 19:51:15,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:51:15,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:51:15,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:51:15,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:51:16,192 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:51:16,192 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-27 19:51:16,192 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 19:51:16,192 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 671 [2020-10-27 19:51:16,192 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:51:16,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 19:51:16,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:51:16,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 19:51:16,193 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:51:16,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:51:16,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:51:16,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:51:16,412 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:51:16,413 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:51:16,413 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:51:16,413 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 19:51:16,413 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:51:16,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:51:16,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:51:16,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:51:16,414 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:51:16,422 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:51:16,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [385246611] [2020-10-27 19:51:16,423 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:51:16,423 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 19:51:16,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377673027] [2020-10-27 19:51:16,424 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 19:51:16,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:51:16,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 19:51:16,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-10-27 19:51:16,425 INFO L87 Difference]: Start difference. First operand 42 states and 52 transitions. Second operand 9 states. [2020-10-27 19:51:16,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:51:16,738 INFO L93 Difference]: Finished difference Result 54 states and 67 transitions. [2020-10-27 19:51:16,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 19:51:16,739 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 22 [2020-10-27 19:51:16,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:51:16,740 INFO L225 Difference]: With dead ends: 54 [2020-10-27 19:51:16,740 INFO L226 Difference]: Without dead ends: 45 [2020-10-27 19:51:16,741 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2020-10-27 19:51:16,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-27 19:51:16,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 40. [2020-10-27 19:51:16,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-27 19:51:16,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 49 transitions. [2020-10-27 19:51:16,755 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 49 transitions. Word has length 22 [2020-10-27 19:51:16,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:51:16,756 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 49 transitions. [2020-10-27 19:51:16,756 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 19:51:16,756 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 49 transitions. [2020-10-27 19:51:16,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-27 19:51:16,757 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:51:16,757 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:51:16,759 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 19:51:16,759 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:51:16,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:51:16,760 INFO L82 PathProgramCache]: Analyzing trace with hash 1288699790, now seen corresponding path program 2 times [2020-10-27 19:51:16,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:51:16,760 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1991881785] [2020-10-27 19:51:16,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:51:16,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:51:16,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:51:16,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:51:17,340 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:51:17,340 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-27 19:51:17,341 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 19:51:17,341 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 558 [2020-10-27 19:51:17,341 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:51:17,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 19:51:17,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:51:17,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 19:51:17,342 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:51:17,440 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:51:17,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:51:17,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:51:17,446 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:51:17,446 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:51:17,447 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:51:17,447 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 19:51:17,447 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:51:17,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:51:17,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:51:17,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:51:17,448 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:51:17,451 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-27 19:51:17,452 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1991881785] [2020-10-27 19:51:17,452 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 19:51:17,452 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 19:51:17,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800623697] [2020-10-27 19:51:17,453 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 19:51:17,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:51:17,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 19:51:17,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 19:51:17,454 INFO L87 Difference]: Start difference. First operand 40 states and 49 transitions. Second operand 6 states. [2020-10-27 19:51:17,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:51:17,623 INFO L93 Difference]: Finished difference Result 54 states and 66 transitions. [2020-10-27 19:51:17,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 19:51:17,624 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2020-10-27 19:51:17,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:51:17,625 INFO L225 Difference]: With dead ends: 54 [2020-10-27 19:51:17,625 INFO L226 Difference]: Without dead ends: 40 [2020-10-27 19:51:17,625 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-27 19:51:17,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-27 19:51:17,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-10-27 19:51:17,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-27 19:51:17,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 48 transitions. [2020-10-27 19:51:17,632 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 48 transitions. Word has length 22 [2020-10-27 19:51:17,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:51:17,632 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 48 transitions. [2020-10-27 19:51:17,632 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 19:51:17,632 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 48 transitions. [2020-10-27 19:51:17,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-27 19:51:17,633 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:51:17,633 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:51:17,633 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 19:51:17,634 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:51:17,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:51:17,634 INFO L82 PathProgramCache]: Analyzing trace with hash -1242981375, now seen corresponding path program 1 times [2020-10-27 19:51:17,634 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:51:17,635 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [694050308] [2020-10-27 19:51:17,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:51:17,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:51:17,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:51:18,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:51:18,880 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:51:18,880 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-27 19:51:18,881 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 19:51:18,881 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1218 [2020-10-27 19:51:18,881 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:51:18,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 19:51:18,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:51:18,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 19:51:18,883 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 19:51:19,162 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:51:19,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:51:19,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:51:19,169 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:51:19,169 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:51:19,169 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:51:19,169 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 19:51:19,169 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:51:19,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:51:19,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:51:19,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:51:19,171 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:51:19,181 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:51:19,181 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [694050308] [2020-10-27 19:51:19,181 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:51:19,181 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 19:51:19,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117779866] [2020-10-27 19:51:19,182 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 19:51:19,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:51:19,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 19:51:19,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-27 19:51:19,183 INFO L87 Difference]: Start difference. First operand 40 states and 48 transitions. Second operand 9 states. [2020-10-27 19:51:19,356 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 57 [2020-10-27 19:51:19,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:51:19,590 INFO L93 Difference]: Finished difference Result 54 states and 65 transitions. [2020-10-27 19:51:19,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 19:51:19,591 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 25 [2020-10-27 19:51:19,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:51:19,592 INFO L225 Difference]: With dead ends: 54 [2020-10-27 19:51:19,592 INFO L226 Difference]: Without dead ends: 45 [2020-10-27 19:51:19,593 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2020-10-27 19:51:19,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-27 19:51:19,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-10-27 19:51:19,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-27 19:51:19,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 53 transitions. [2020-10-27 19:51:19,600 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 53 transitions. Word has length 25 [2020-10-27 19:51:19,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:51:19,600 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 53 transitions. [2020-10-27 19:51:19,600 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 19:51:19,600 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 53 transitions. [2020-10-27 19:51:19,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-27 19:51:19,601 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:51:19,601 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:51:19,602 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 19:51:19,602 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:51:19,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:51:19,602 INFO L82 PathProgramCache]: Analyzing trace with hash 532025987, now seen corresponding path program 1 times [2020-10-27 19:51:19,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:51:19,603 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1339518296] [2020-10-27 19:51:19,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:51:19,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:51:19,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:51:20,336 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:51:20,337 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-27 19:51:20,337 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:51:20,337 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 696 [2020-10-27 19:51:20,337 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:51:20,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 19:51:20,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:51:20,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-27 19:51:20,338 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:51:20,717 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:51:20,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:51:20,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:51:20,726 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:51:20,727 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:51:20,727 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:51:20,727 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 19:51:20,727 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:51:20,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:51:20,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:51:20,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:51:20,728 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:51:20,742 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:51:20,742 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1339518296] [2020-10-27 19:51:20,743 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:51:20,743 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 19:51:20,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25925863] [2020-10-27 19:51:20,745 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 19:51:20,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:51:20,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 19:51:20,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-27 19:51:20,747 INFO L87 Difference]: Start difference. First operand 45 states and 53 transitions. Second operand 10 states. [2020-10-27 19:51:20,917 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 48 [2020-10-27 19:51:21,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:51:21,303 INFO L93 Difference]: Finished difference Result 66 states and 79 transitions. [2020-10-27 19:51:21,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 19:51:21,304 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 25 [2020-10-27 19:51:21,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:51:21,305 INFO L225 Difference]: With dead ends: 66 [2020-10-27 19:51:21,305 INFO L226 Difference]: Without dead ends: 62 [2020-10-27 19:51:21,306 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-10-27 19:51:21,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-27 19:51:21,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 47. [2020-10-27 19:51:21,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-27 19:51:21,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 56 transitions. [2020-10-27 19:51:21,320 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 56 transitions. Word has length 25 [2020-10-27 19:51:21,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:51:21,320 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 56 transitions. [2020-10-27 19:51:21,320 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 19:51:21,320 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 56 transitions. [2020-10-27 19:51:21,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-27 19:51:21,324 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:51:21,324 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:51:21,324 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 19:51:21,324 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:51:21,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:51:21,325 INFO L82 PathProgramCache]: Analyzing trace with hash 533873029, now seen corresponding path program 1 times [2020-10-27 19:51:21,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:51:21,326 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [198722717] [2020-10-27 19:51:21,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:51:21,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:51:21,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:51:21,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:51:22,802 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:51:22,803 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-27 19:51:22,803 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 19:51:22,803 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1436 [2020-10-27 19:51:22,803 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:51:22,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 19:51:22,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:51:22,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-27 19:51:22,804 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:51:23,020 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 41 [2020-10-27 19:51:23,328 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:51:23,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:51:23,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:51:23,336 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:51:23,336 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:51:23,336 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:51:23,336 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 19:51:23,336 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:51:23,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:51:23,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:51:23,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:51:23,337 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:51:23,346 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:51:23,348 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [198722717] [2020-10-27 19:51:23,348 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:51:23,348 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 19:51:23,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405412680] [2020-10-27 19:51:23,349 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 19:51:23,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:51:23,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 19:51:23,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-27 19:51:23,352 INFO L87 Difference]: Start difference. First operand 47 states and 56 transitions. Second operand 10 states. [2020-10-27 19:51:23,505 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 58 [2020-10-27 19:51:23,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:51:23,924 INFO L93 Difference]: Finished difference Result 63 states and 76 transitions. [2020-10-27 19:51:23,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 19:51:23,924 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 25 [2020-10-27 19:51:23,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:51:23,925 INFO L225 Difference]: With dead ends: 63 [2020-10-27 19:51:23,925 INFO L226 Difference]: Without dead ends: 54 [2020-10-27 19:51:23,926 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-27 19:51:23,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-27 19:51:23,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 40. [2020-10-27 19:51:23,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-27 19:51:23,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 48 transitions. [2020-10-27 19:51:23,935 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 48 transitions. Word has length 25 [2020-10-27 19:51:23,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:51:23,935 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 48 transitions. [2020-10-27 19:51:23,935 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 19:51:23,935 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 48 transitions. [2020-10-27 19:51:23,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-27 19:51:23,936 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:51:23,936 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:51:23,936 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 19:51:23,937 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:51:23,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:51:23,937 INFO L82 PathProgramCache]: Analyzing trace with hash -984815937, now seen corresponding path program 2 times [2020-10-27 19:51:23,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:51:23,937 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1595060306] [2020-10-27 19:51:23,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:51:23,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:51:24,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:51:24,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:51:24,802 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:51:24,803 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-27 19:51:24,803 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 19:51:24,803 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 826 [2020-10-27 19:51:24,803 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:51:24,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 19:51:24,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:51:24,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-27 19:51:24,803 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:51:25,191 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:51:25,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:51:25,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:51:25,196 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:51:25,196 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:51:25,196 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:51:25,196 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:51:25,196 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:51:25,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:51:25,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:51:25,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:51:25,197 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:51:25,207 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:51:25,207 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1595060306] [2020-10-27 19:51:25,207 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:51:25,207 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 19:51:25,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720563173] [2020-10-27 19:51:25,208 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 19:51:25,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:51:25,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 19:51:25,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-27 19:51:25,209 INFO L87 Difference]: Start difference. First operand 40 states and 48 transitions. Second operand 10 states. [2020-10-27 19:51:25,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:51:25,708 INFO L93 Difference]: Finished difference Result 56 states and 68 transitions. [2020-10-27 19:51:25,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 19:51:25,709 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 25 [2020-10-27 19:51:25,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:51:25,710 INFO L225 Difference]: With dead ends: 56 [2020-10-27 19:51:25,710 INFO L226 Difference]: Without dead ends: 52 [2020-10-27 19:51:25,711 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-27 19:51:25,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-27 19:51:25,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 47. [2020-10-27 19:51:25,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-27 19:51:25,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 57 transitions. [2020-10-27 19:51:25,718 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 57 transitions. Word has length 25 [2020-10-27 19:51:25,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:51:25,718 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 57 transitions. [2020-10-27 19:51:25,718 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 19:51:25,718 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 57 transitions. [2020-10-27 19:51:25,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-27 19:51:25,719 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:51:25,719 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:51:25,719 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 19:51:25,720 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:51:25,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:51:25,720 INFO L82 PathProgramCache]: Analyzing trace with hash -982968895, now seen corresponding path program 2 times [2020-10-27 19:51:25,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:51:25,721 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1022598677] [2020-10-27 19:51:25,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:51:25,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:51:25,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:51:25,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:51:26,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:51:27,057 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:51:27,058 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-27 19:51:27,058 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 19:51:27,058 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1304 [2020-10-27 19:51:27,058 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:51:27,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 19:51:27,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:51:27,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-27 19:51:27,059 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:51:27,237 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:51:27,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:51:27,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:51:27,250 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:51:27,251 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:51:27,251 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:51:27,251 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 19:51:27,251 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:51:27,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:51:27,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:51:27,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:51:27,252 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:51:27,257 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-27 19:51:27,258 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1022598677] [2020-10-27 19:51:27,258 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:51:27,258 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 19:51:27,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014226526] [2020-10-27 19:51:27,259 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 19:51:27,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:51:27,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 19:51:27,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-27 19:51:27,273 INFO L87 Difference]: Start difference. First operand 47 states and 57 transitions. Second operand 7 states. [2020-10-27 19:51:27,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:51:27,551 INFO L93 Difference]: Finished difference Result 75 states and 93 transitions. [2020-10-27 19:51:27,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 19:51:27,556 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2020-10-27 19:51:27,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:51:27,557 INFO L225 Difference]: With dead ends: 75 [2020-10-27 19:51:27,557 INFO L226 Difference]: Without dead ends: 53 [2020-10-27 19:51:27,558 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-10-27 19:51:27,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-27 19:51:27,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 50. [2020-10-27 19:51:27,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-27 19:51:27,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 62 transitions. [2020-10-27 19:51:27,567 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 62 transitions. Word has length 25 [2020-10-27 19:51:27,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:51:27,567 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 62 transitions. [2020-10-27 19:51:27,567 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 19:51:27,567 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 62 transitions. [2020-10-27 19:51:27,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-27 19:51:27,569 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:51:27,569 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:51:27,569 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 19:51:27,569 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:51:27,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:51:27,570 INFO L82 PathProgramCache]: Analyzing trace with hash 940445199, now seen corresponding path program 3 times [2020-10-27 19:51:27,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:51:27,570 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [884506500] [2020-10-27 19:51:27,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:51:27,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:51:27,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:51:28,290 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:51:28,291 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-27 19:51:28,291 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:51:28,291 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 691 [2020-10-27 19:51:28,291 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:51:28,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 19:51:28,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:51:28,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-27 19:51:28,292 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:51:28,942 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:51:28,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:51:28,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:51:28,948 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:51:28,949 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:51:28,949 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:51:28,949 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 19:51:28,949 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:51:28,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:51:28,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:51:28,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:51:28,950 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:51:28,964 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:51:28,965 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [884506500] [2020-10-27 19:51:28,965 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:51:28,965 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 19:51:28,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322666596] [2020-10-27 19:51:28,966 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 19:51:28,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:51:28,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 19:51:28,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-10-27 19:51:28,970 INFO L87 Difference]: Start difference. First operand 50 states and 62 transitions. Second operand 11 states. [2020-10-27 19:51:29,136 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 56 [2020-10-27 19:51:29,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:51:29,802 INFO L93 Difference]: Finished difference Result 79 states and 98 transitions. [2020-10-27 19:51:29,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 19:51:29,802 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 27 [2020-10-27 19:51:29,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:51:29,803 INFO L225 Difference]: With dead ends: 79 [2020-10-27 19:51:29,803 INFO L226 Difference]: Without dead ends: 75 [2020-10-27 19:51:29,804 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-10-27 19:51:29,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-27 19:51:29,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 72. [2020-10-27 19:51:29,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-27 19:51:29,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 90 transitions. [2020-10-27 19:51:29,823 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 90 transitions. Word has length 27 [2020-10-27 19:51:29,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:51:29,825 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 90 transitions. [2020-10-27 19:51:29,825 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 19:51:29,825 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 90 transitions. [2020-10-27 19:51:29,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-27 19:51:29,826 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:51:29,826 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:51:29,827 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-27 19:51:29,827 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:51:29,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:51:29,827 INFO L82 PathProgramCache]: Analyzing trace with hash 942292241, now seen corresponding path program 2 times [2020-10-27 19:51:29,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:51:29,828 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1759743718] [2020-10-27 19:51:29,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:51:29,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:51:29,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:51:30,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:51:31,404 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:51:31,404 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-27 19:51:31,404 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 19:51:31,405 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1545 [2020-10-27 19:51:31,405 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:51:31,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 19:51:31,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:51:31,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-27 19:51:31,406 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:51:31,945 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:51:31,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:51:31,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:51:31,950 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:51:31,951 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:51:31,951 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:51:31,951 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:51:31,951 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:51:31,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:51:31,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:51:31,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:51:31,952 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:51:31,963 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:51:31,967 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1759743718] [2020-10-27 19:51:31,967 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:51:31,968 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 19:51:31,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635380156] [2020-10-27 19:51:31,970 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 19:51:31,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:51:31,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 19:51:31,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-10-27 19:51:31,973 INFO L87 Difference]: Start difference. First operand 72 states and 90 transitions. Second operand 11 states. [2020-10-27 19:51:32,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:51:32,760 INFO L93 Difference]: Finished difference Result 114 states and 149 transitions. [2020-10-27 19:51:32,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 19:51:32,760 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 27 [2020-10-27 19:51:32,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:51:32,761 INFO L225 Difference]: With dead ends: 114 [2020-10-27 19:51:32,761 INFO L226 Difference]: Without dead ends: 93 [2020-10-27 19:51:32,762 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2020-10-27 19:51:32,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-27 19:51:32,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 84. [2020-10-27 19:51:32,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-27 19:51:32,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 104 transitions. [2020-10-27 19:51:32,772 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 104 transitions. Word has length 27 [2020-10-27 19:51:32,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:51:32,773 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 104 transitions. [2020-10-27 19:51:32,773 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 19:51:32,773 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 104 transitions. [2020-10-27 19:51:32,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-27 19:51:32,774 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:51:32,774 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:51:32,774 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-27 19:51:32,774 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:51:32,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:51:32,775 INFO L82 PathProgramCache]: Analyzing trace with hash 344265968, now seen corresponding path program 3 times [2020-10-27 19:51:32,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:51:32,775 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [245783512] [2020-10-27 19:51:32,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:51:32,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:51:32,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:51:33,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:51:33,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:51:34,639 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:51:34,640 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-27 19:51:34,640 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 19:51:34,640 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1818 [2020-10-27 19:51:34,640 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:51:34,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 19:51:34,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:51:34,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-27 19:51:34,641 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:51:35,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:51:35,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:51:35,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:51:35,045 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:51:35,045 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:51:35,045 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:51:35,045 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 19:51:35,045 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:51:35,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:51:35,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:51:35,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:51:35,046 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:51:35,061 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-27 19:51:35,061 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [245783512] [2020-10-27 19:51:35,061 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:51:35,061 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 19:51:35,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123206816] [2020-10-27 19:51:35,062 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 19:51:35,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:51:35,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 19:51:35,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-10-27 19:51:35,063 INFO L87 Difference]: Start difference. First operand 84 states and 104 transitions. Second operand 10 states. [2020-10-27 19:51:35,213 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 61 [2020-10-27 19:51:35,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:51:35,517 INFO L93 Difference]: Finished difference Result 96 states and 119 transitions. [2020-10-27 19:51:35,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 19:51:35,518 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 28 [2020-10-27 19:51:35,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:51:35,519 INFO L225 Difference]: With dead ends: 96 [2020-10-27 19:51:35,519 INFO L226 Difference]: Without dead ends: 87 [2020-10-27 19:51:35,519 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2020-10-27 19:51:35,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-27 19:51:35,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 82. [2020-10-27 19:51:35,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-27 19:51:35,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 101 transitions. [2020-10-27 19:51:35,529 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 101 transitions. Word has length 28 [2020-10-27 19:51:35,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:51:35,529 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 101 transitions. [2020-10-27 19:51:35,529 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 19:51:35,529 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 101 transitions. [2020-10-27 19:51:35,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-27 19:51:35,530 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:51:35,530 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:51:35,530 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-27 19:51:35,531 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:51:35,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:51:35,531 INFO L82 PathProgramCache]: Analyzing trace with hash 807861630, now seen corresponding path program 3 times [2020-10-27 19:51:35,531 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:51:35,531 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [658843715] [2020-10-27 19:51:35,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:51:35,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:51:35,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:51:36,768 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:51:36,768 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-27 19:51:36,769 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:51:36,769 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1184 [2020-10-27 19:51:36,769 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:51:36,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 19:51:36,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:51:36,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-27 19:51:36,770 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:51:37,044 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 44 [2020-10-27 19:51:37,278 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 51 [2020-10-27 19:51:37,662 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:51:37,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:51:37,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:51:37,668 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:51:37,668 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:51:37,668 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:51:37,668 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 19:51:37,668 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:51:37,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:51:37,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:51:37,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:51:37,669 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:51:37,684 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:51:37,685 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [658843715] [2020-10-27 19:51:37,685 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:51:37,685 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 19:51:37,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942197067] [2020-10-27 19:51:37,685 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 19:51:37,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:51:37,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 19:51:37,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2020-10-27 19:51:37,686 INFO L87 Difference]: Start difference. First operand 82 states and 101 transitions. Second operand 12 states. [2020-10-27 19:51:37,945 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 67 [2020-10-27 19:51:38,239 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 66 [2020-10-27 19:51:38,418 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 58 [2020-10-27 19:51:38,626 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 59 [2020-10-27 19:51:38,956 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 50 [2020-10-27 19:51:39,210 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 59 [2020-10-27 19:51:39,393 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 51 [2020-10-27 19:51:40,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:51:40,001 INFO L93 Difference]: Finished difference Result 105 states and 129 transitions. [2020-10-27 19:51:40,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-27 19:51:40,001 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 30 [2020-10-27 19:51:40,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:51:40,002 INFO L225 Difference]: With dead ends: 105 [2020-10-27 19:51:40,002 INFO L226 Difference]: Without dead ends: 101 [2020-10-27 19:51:40,003 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=174, Invalid=582, Unknown=0, NotChecked=0, Total=756 [2020-10-27 19:51:40,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-27 19:51:40,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 94. [2020-10-27 19:51:40,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-27 19:51:40,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 116 transitions. [2020-10-27 19:51:40,013 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 116 transitions. Word has length 30 [2020-10-27 19:51:40,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:51:40,014 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 116 transitions. [2020-10-27 19:51:40,014 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 19:51:40,014 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 116 transitions. [2020-10-27 19:51:40,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-27 19:51:40,014 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:51:40,015 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:51:40,015 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-27 19:51:40,015 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:51:40,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:51:40,015 INFO L82 PathProgramCache]: Analyzing trace with hash 809708672, now seen corresponding path program 4 times [2020-10-27 19:51:40,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:51:40,016 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [492021630] [2020-10-27 19:51:40,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:51:40,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:51:40,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:51:40,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:51:41,729 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:51:41,729 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-27 19:51:41,730 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 19:51:41,730 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1664 [2020-10-27 19:51:41,730 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:51:41,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 19:51:41,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:51:41,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-27 19:51:41,730 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:51:42,047 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 40 [2020-10-27 19:51:42,163 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 53 [2020-10-27 19:51:42,288 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 55 [2020-10-27 19:51:42,667 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:51:42,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:51:42,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:51:42,673 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:51:42,673 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:51:42,673 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:51:42,673 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 19:51:42,674 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:51:42,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:51:42,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:51:42,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:51:42,674 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:51:42,685 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:51:42,685 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [492021630] [2020-10-27 19:51:42,685 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:51:42,685 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 19:51:42,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292179259] [2020-10-27 19:51:42,686 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 19:51:42,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:51:42,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 19:51:42,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-10-27 19:51:42,687 INFO L87 Difference]: Start difference. First operand 94 states and 116 transitions. Second operand 12 states. [2020-10-27 19:51:42,951 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 67 [2020-10-27 19:51:43,327 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 73 [2020-10-27 19:51:43,543 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 60 [2020-10-27 19:51:44,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:51:44,284 INFO L93 Difference]: Finished difference Result 118 states and 146 transitions. [2020-10-27 19:51:44,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 19:51:44,285 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 30 [2020-10-27 19:51:44,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:51:44,286 INFO L225 Difference]: With dead ends: 118 [2020-10-27 19:51:44,286 INFO L226 Difference]: Without dead ends: 109 [2020-10-27 19:51:44,287 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=114, Invalid=392, Unknown=0, NotChecked=0, Total=506 [2020-10-27 19:51:44,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-27 19:51:44,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 94. [2020-10-27 19:51:44,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-27 19:51:44,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 116 transitions. [2020-10-27 19:51:44,297 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 116 transitions. Word has length 30 [2020-10-27 19:51:44,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:51:44,297 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 116 transitions. [2020-10-27 19:51:44,297 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 19:51:44,297 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 116 transitions. [2020-10-27 19:51:44,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-27 19:51:44,298 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:51:44,298 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:51:44,298 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-27 19:51:44,298 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:51:44,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:51:44,299 INFO L82 PathProgramCache]: Analyzing trace with hash -1712098304, now seen corresponding path program 4 times [2020-10-27 19:51:44,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:51:44,299 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [418084415] [2020-10-27 19:51:44,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:51:44,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:51:44,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:51:44,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:51:45,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:51:46,631 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:51:46,632 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-27 19:51:46,632 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 19:51:46,632 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2259 [2020-10-27 19:51:46,632 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:51:46,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 19:51:46,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:51:46,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-27 19:51:46,633 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:51:47,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:51:47,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:51:47,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:51:47,315 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:51:47,315 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:51:47,315 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:51:47,316 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 19:51:47,316 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:51:47,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:51:47,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:51:47,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:51:47,317 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:51:47,331 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:51:47,331 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [418084415] [2020-10-27 19:51:47,332 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:51:47,332 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 19:51:47,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692445726] [2020-10-27 19:51:47,332 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 19:51:47,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:51:47,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 19:51:47,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2020-10-27 19:51:47,333 INFO L87 Difference]: Start difference. First operand 94 states and 116 transitions. Second operand 12 states. [2020-10-27 19:51:47,676 WARN L193 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 80 [2020-10-27 19:51:48,135 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 81 [2020-10-27 19:51:48,324 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 61 [2020-10-27 19:51:49,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:51:49,411 INFO L93 Difference]: Finished difference Result 121 states and 149 transitions. [2020-10-27 19:51:49,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 19:51:49,413 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 30 [2020-10-27 19:51:49,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:51:49,414 INFO L225 Difference]: With dead ends: 121 [2020-10-27 19:51:49,414 INFO L226 Difference]: Without dead ends: 117 [2020-10-27 19:51:49,414 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=123, Invalid=477, Unknown=0, NotChecked=0, Total=600 [2020-10-27 19:51:49,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-27 19:51:49,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 94. [2020-10-27 19:51:49,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-27 19:51:49,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 116 transitions. [2020-10-27 19:51:49,423 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 116 transitions. Word has length 30 [2020-10-27 19:51:49,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:51:49,424 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 116 transitions. [2020-10-27 19:51:49,424 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 19:51:49,424 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 116 transitions. [2020-10-27 19:51:49,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-27 19:51:49,424 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:51:49,425 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:51:49,425 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-27 19:51:49,425 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:51:49,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:51:49,425 INFO L82 PathProgramCache]: Analyzing trace with hash -1710251262, now seen corresponding path program 5 times [2020-10-27 19:51:49,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:51:49,426 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [158339107] [2020-10-27 19:51:49,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:51:49,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:51:49,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:51:49,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:51:50,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:51:50,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:51:50,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:51:52,001 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:51:52,001 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-27 19:51:52,001 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 19:51:52,001 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2531 [2020-10-27 19:51:52,002 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:51:52,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 19:51:52,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:51:52,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-27 19:51:52,002 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:51:52,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:51:52,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:51:52,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:51:52,435 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:51:52,435 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:51:52,435 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:51:52,435 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:51:52,436 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:51:52,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:51:52,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:51:52,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:51:52,436 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:51:52,446 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:51:52,447 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [158339107] [2020-10-27 19:51:52,447 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:51:52,447 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 19:51:52,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223814636] [2020-10-27 19:51:52,451 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 19:51:52,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:51:52,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 19:51:52,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-27 19:51:52,452 INFO L87 Difference]: Start difference. First operand 94 states and 116 transitions. Second operand 12 states. [2020-10-27 19:51:52,678 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 73 [2020-10-27 19:51:52,939 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 73 [2020-10-27 19:51:53,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:51:53,440 INFO L93 Difference]: Finished difference Result 118 states and 146 transitions. [2020-10-27 19:51:53,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 19:51:53,441 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 30 [2020-10-27 19:51:53,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:51:53,442 INFO L225 Difference]: With dead ends: 118 [2020-10-27 19:51:53,442 INFO L226 Difference]: Without dead ends: 109 [2020-10-27 19:51:53,443 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=109, Invalid=311, Unknown=0, NotChecked=0, Total=420 [2020-10-27 19:51:53,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-27 19:51:53,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 94. [2020-10-27 19:51:53,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-27 19:51:53,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 116 transitions. [2020-10-27 19:51:53,455 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 116 transitions. Word has length 30 [2020-10-27 19:51:53,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:51:53,455 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 116 transitions. [2020-10-27 19:51:53,455 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 19:51:53,455 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 116 transitions. [2020-10-27 19:51:53,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-27 19:51:53,456 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:51:53,456 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:51:53,456 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-27 19:51:53,456 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:51:53,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:51:53,457 INFO L82 PathProgramCache]: Analyzing trace with hash -176531086, now seen corresponding path program 4 times [2020-10-27 19:51:53,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:51:53,457 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [440981588] [2020-10-27 19:51:53,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:51:53,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:51:53,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:51:53,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:51:55,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:51:55,886 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:51:55,887 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-27 19:51:55,887 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 19:51:55,887 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2391 [2020-10-27 19:51:55,887 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:51:55,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 19:51:55,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:51:55,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-27 19:51:55,888 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:51:56,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:51:56,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:51:56,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:51:56,380 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:51:56,380 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:51:56,380 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:51:56,380 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 19:51:56,380 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:51:56,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:51:56,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:51:56,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:51:56,381 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:51:56,394 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:51:56,394 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [440981588] [2020-10-27 19:51:56,395 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:51:56,395 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 19:51:56,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061952913] [2020-10-27 19:51:56,396 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 19:51:56,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:51:56,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 19:51:56,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-27 19:51:56,397 INFO L87 Difference]: Start difference. First operand 94 states and 116 transitions. Second operand 12 states. [2020-10-27 19:51:57,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:51:57,198 INFO L93 Difference]: Finished difference Result 118 states and 144 transitions. [2020-10-27 19:51:57,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 19:51:57,201 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 32 [2020-10-27 19:51:57,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:51:57,202 INFO L225 Difference]: With dead ends: 118 [2020-10-27 19:51:57,202 INFO L226 Difference]: Without dead ends: 114 [2020-10-27 19:51:57,203 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2020-10-27 19:51:57,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-27 19:51:57,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 104. [2020-10-27 19:51:57,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-27 19:51:57,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 128 transitions. [2020-10-27 19:51:57,215 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 128 transitions. Word has length 32 [2020-10-27 19:51:57,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:51:57,215 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 128 transitions. [2020-10-27 19:51:57,216 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 19:51:57,216 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 128 transitions. [2020-10-27 19:51:57,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-27 19:51:57,216 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:51:57,216 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:51:57,217 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-27 19:51:57,217 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:51:57,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:51:57,217 INFO L82 PathProgramCache]: Analyzing trace with hash 83481394, now seen corresponding path program 3 times [2020-10-27 19:51:57,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:51:57,218 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [839785953] [2020-10-27 19:51:57,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:51:57,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:51:57,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:51:57,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:51:58,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:51:59,574 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:51:59,574 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-27 19:51:59,574 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 19:51:59,575 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2322 [2020-10-27 19:51:59,575 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:51:59,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 19:51:59,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:51:59,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 19:51:59,575 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:51:59,815 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-10-27 19:52:00,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:52:00,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:52:00,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:52:00,183 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:52:00,184 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:52:00,184 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:52:00,184 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 19:52:00,184 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:52:00,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:52:00,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:52:00,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:52:00,185 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:52:00,194 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 18 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-27 19:52:00,195 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [839785953] [2020-10-27 19:52:00,195 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:52:00,195 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 19:52:00,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304767547] [2020-10-27 19:52:00,196 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 19:52:00,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:52:00,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 19:52:00,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-10-27 19:52:00,196 INFO L87 Difference]: Start difference. First operand 104 states and 128 transitions. Second operand 10 states. [2020-10-27 19:52:00,375 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 58 [2020-10-27 19:52:00,694 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 60 [2020-10-27 19:52:00,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:52:00,901 INFO L93 Difference]: Finished difference Result 113 states and 139 transitions. [2020-10-27 19:52:00,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 19:52:00,901 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 32 [2020-10-27 19:52:00,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:52:00,903 INFO L225 Difference]: With dead ends: 113 [2020-10-27 19:52:00,903 INFO L226 Difference]: Without dead ends: 90 [2020-10-27 19:52:00,904 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2020-10-27 19:52:00,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-27 19:52:00,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2020-10-27 19:52:00,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-27 19:52:00,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 106 transitions. [2020-10-27 19:52:00,914 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 106 transitions. Word has length 32 [2020-10-27 19:52:00,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:52:00,914 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 106 transitions. [2020-10-27 19:52:00,915 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 19:52:00,915 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 106 transitions. [2020-10-27 19:52:00,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-27 19:52:00,915 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:52:00,915 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:52:00,915 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-27 19:52:00,916 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:52:00,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:52:00,916 INFO L82 PathProgramCache]: Analyzing trace with hash 534156531, now seen corresponding path program 5 times [2020-10-27 19:52:00,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:52:00,917 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [185609265] [2020-10-27 19:52:00,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:52:00,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:52:00,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:52:01,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:52:02,269 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:52:02,269 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-27 19:52:02,269 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 19:52:02,269 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1319 [2020-10-27 19:52:02,269 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:52:02,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 19:52:02,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:52:02,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-27 19:52:02,270 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:52:02,986 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:52:02,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:52:02,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:52:02,992 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:52:02,992 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:52:02,992 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:52:02,992 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 19:52:02,993 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:52:02,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:52:02,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:52:02,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:52:02,993 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:52:03,005 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:52:03,006 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [185609265] [2020-10-27 19:52:03,006 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:52:03,006 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 19:52:03,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788965156] [2020-10-27 19:52:03,007 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 19:52:03,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:52:03,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 19:52:03,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-10-27 19:52:03,008 INFO L87 Difference]: Start difference. First operand 90 states and 106 transitions. Second operand 13 states. [2020-10-27 19:52:03,426 WARN L193 SmtUtils]: Spent 364.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 84 [2020-10-27 19:52:03,939 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 82 [2020-10-27 19:52:04,116 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 59 [2020-10-27 19:52:04,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:52:04,656 INFO L93 Difference]: Finished difference Result 106 states and 126 transitions. [2020-10-27 19:52:04,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 19:52:04,657 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 33 [2020-10-27 19:52:04,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:52:04,658 INFO L225 Difference]: With dead ends: 106 [2020-10-27 19:52:04,658 INFO L226 Difference]: Without dead ends: 102 [2020-10-27 19:52:04,659 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=114, Invalid=392, Unknown=0, NotChecked=0, Total=506 [2020-10-27 19:52:04,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-27 19:52:04,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 95. [2020-10-27 19:52:04,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-27 19:52:04,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 112 transitions. [2020-10-27 19:52:04,669 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 112 transitions. Word has length 33 [2020-10-27 19:52:04,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:52:04,669 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 112 transitions. [2020-10-27 19:52:04,670 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 19:52:04,670 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 112 transitions. [2020-10-27 19:52:04,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-27 19:52:04,670 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:52:04,670 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:52:04,671 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-27 19:52:04,671 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:52:04,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:52:04,671 INFO L82 PathProgramCache]: Analyzing trace with hash 536003573, now seen corresponding path program 6 times [2020-10-27 19:52:04,671 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:52:04,672 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [97826857] [2020-10-27 19:52:04,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:52:04,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:52:04,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:52:04,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:52:05,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:52:06,418 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:52:06,419 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-27 19:52:06,419 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 19:52:06,419 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1713 [2020-10-27 19:52:06,419 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:52:06,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 19:52:06,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:52:06,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-27 19:52:06,419 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:52:07,255 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:52:07,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:52:07,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:52:07,259 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:52:07,260 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:52:07,260 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:52:07,260 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:52:07,260 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:52:07,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:52:07,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:52:07,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:52:07,260 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:52:07,275 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:52:07,275 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [97826857] [2020-10-27 19:52:07,275 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:52:07,275 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 19:52:07,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285149596] [2020-10-27 19:52:07,276 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 19:52:07,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:52:07,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 19:52:07,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2020-10-27 19:52:07,277 INFO L87 Difference]: Start difference. First operand 95 states and 112 transitions. Second operand 13 states. [2020-10-27 19:52:07,608 WARN L193 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 77 [2020-10-27 19:52:08,027 WARN L193 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 74 [2020-10-27 19:52:08,206 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 59 [2020-10-27 19:52:08,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:52:08,951 INFO L93 Difference]: Finished difference Result 109 states and 130 transitions. [2020-10-27 19:52:08,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 19:52:08,952 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 33 [2020-10-27 19:52:08,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:52:08,953 INFO L225 Difference]: With dead ends: 109 [2020-10-27 19:52:08,953 INFO L226 Difference]: Without dead ends: 100 [2020-10-27 19:52:08,953 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=118, Invalid=388, Unknown=0, NotChecked=0, Total=506 [2020-10-27 19:52:08,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-27 19:52:08,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 95. [2020-10-27 19:52:08,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-27 19:52:08,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 112 transitions. [2020-10-27 19:52:08,964 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 112 transitions. Word has length 33 [2020-10-27 19:52:08,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:52:08,964 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 112 transitions. [2020-10-27 19:52:08,964 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 19:52:08,964 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 112 transitions. [2020-10-27 19:52:08,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-27 19:52:08,965 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:52:08,965 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:52:08,965 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-27 19:52:08,965 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:52:08,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:52:08,966 INFO L82 PathProgramCache]: Analyzing trace with hash -1985803403, now seen corresponding path program 6 times [2020-10-27 19:52:08,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:52:08,966 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1030202503] [2020-10-27 19:52:08,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:52:08,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:52:09,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:52:09,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:52:10,104 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:52:10,105 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-27 19:52:10,105 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 19:52:10,105 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1107 [2020-10-27 19:52:10,105 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:52:10,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 19:52:10,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:52:10,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-27 19:52:10,105 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:52:10,337 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 39 [2020-10-27 19:52:10,458 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 43 [2020-10-27 19:52:10,701 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 60 [2020-10-27 19:52:11,059 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:52:11,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:52:11,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:52:11,066 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:52:11,066 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:52:11,066 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:52:11,066 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 19:52:11,066 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:52:11,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:52:11,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:52:11,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:52:11,067 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:52:11,079 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:52:11,079 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1030202503] [2020-10-27 19:52:11,079 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:52:11,079 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 19:52:11,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783068286] [2020-10-27 19:52:11,080 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 19:52:11,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:52:11,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 19:52:11,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-10-27 19:52:11,081 INFO L87 Difference]: Start difference. First operand 95 states and 112 transitions. Second operand 13 states. [2020-10-27 19:52:11,526 WARN L193 SmtUtils]: Spent 394.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 84 [2020-10-27 19:52:12,169 WARN L193 SmtUtils]: Spent 325.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 85 [2020-10-27 19:52:12,365 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 61 [2020-10-27 19:52:13,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:52:13,171 INFO L93 Difference]: Finished difference Result 106 states and 126 transitions. [2020-10-27 19:52:13,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 19:52:13,172 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 33 [2020-10-27 19:52:13,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:52:13,173 INFO L225 Difference]: With dead ends: 106 [2020-10-27 19:52:13,173 INFO L226 Difference]: Without dead ends: 102 [2020-10-27 19:52:13,173 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=128, Invalid=424, Unknown=0, NotChecked=0, Total=552 [2020-10-27 19:52:13,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-27 19:52:13,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 95. [2020-10-27 19:52:13,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-27 19:52:13,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 112 transitions. [2020-10-27 19:52:13,184 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 112 transitions. Word has length 33 [2020-10-27 19:52:13,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:52:13,184 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 112 transitions. [2020-10-27 19:52:13,184 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 19:52:13,185 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 112 transitions. [2020-10-27 19:52:13,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-27 19:52:13,185 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:52:13,185 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:52:13,186 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-27 19:52:13,186 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:52:13,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:52:13,186 INFO L82 PathProgramCache]: Analyzing trace with hash -1983956361, now seen corresponding path program 7 times [2020-10-27 19:52:13,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:52:13,186 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1745455220] [2020-10-27 19:52:13,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:52:13,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:52:13,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:52:13,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:52:14,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:52:15,000 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:52:15,001 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-27 19:52:15,001 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 19:52:15,001 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1786 [2020-10-27 19:52:15,001 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:52:15,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 19:52:15,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:52:15,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-27 19:52:15,002 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:52:15,301 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 46 [2020-10-27 19:52:15,478 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 42 [2020-10-27 19:52:16,053 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:52:16,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:52:16,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:52:16,058 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:52:16,059 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:52:16,059 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:52:16,059 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:52:16,059 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:52:16,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:52:16,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:52:16,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:52:16,060 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:52:16,077 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:52:16,078 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1745455220] [2020-10-27 19:52:16,078 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:52:16,078 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 19:52:16,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990179729] [2020-10-27 19:52:16,079 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 19:52:16,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:52:16,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 19:52:16,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2020-10-27 19:52:16,080 INFO L87 Difference]: Start difference. First operand 95 states and 112 transitions. Second operand 13 states. [2020-10-27 19:52:16,389 WARN L193 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 76 [2020-10-27 19:52:16,831 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 78 [2020-10-27 19:52:16,998 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 52 [2020-10-27 19:52:17,142 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 53 [2020-10-27 19:52:17,855 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2020-10-27 19:52:18,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:52:18,290 INFO L93 Difference]: Finished difference Result 126 states and 153 transitions. [2020-10-27 19:52:18,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 19:52:18,291 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 33 [2020-10-27 19:52:18,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:52:18,291 INFO L225 Difference]: With dead ends: 126 [2020-10-27 19:52:18,292 INFO L226 Difference]: Without dead ends: 117 [2020-10-27 19:52:18,292 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=161, Invalid=541, Unknown=0, NotChecked=0, Total=702 [2020-10-27 19:52:18,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-27 19:52:18,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 101. [2020-10-27 19:52:18,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-27 19:52:18,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 121 transitions. [2020-10-27 19:52:18,303 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 121 transitions. Word has length 33 [2020-10-27 19:52:18,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:52:18,303 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 121 transitions. [2020-10-27 19:52:18,304 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 19:52:18,304 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 121 transitions. [2020-10-27 19:52:18,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-27 19:52:18,304 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:52:18,304 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:52:18,304 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-27 19:52:18,305 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:52:18,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:52:18,305 INFO L82 PathProgramCache]: Analyzing trace with hash 794169011, now seen corresponding path program 8 times [2020-10-27 19:52:18,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:52:18,305 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [783548788] [2020-10-27 19:52:18,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:52:18,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:52:18,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:52:18,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:52:18,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:52:19,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:52:20,327 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:52:20,328 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-27 19:52:20,328 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 19:52:20,328 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1992 [2020-10-27 19:52:20,328 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:52:20,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 19:52:20,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:52:20,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 19:52:20,328 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:52:20,619 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:52:20,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:52:20,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:52:20,624 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:52:20,624 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:52:20,624 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:52:20,624 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 19:52:20,624 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:52:20,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:52:20,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:52:20,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:52:20,625 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:52:20,633 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-27 19:52:20,633 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [783548788] [2020-10-27 19:52:20,633 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:52:20,633 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 19:52:20,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213240637] [2020-10-27 19:52:20,634 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 19:52:20,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:52:20,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 19:52:20,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-10-27 19:52:20,635 INFO L87 Difference]: Start difference. First operand 101 states and 121 transitions. Second operand 8 states. [2020-10-27 19:52:20,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:52:20,835 INFO L93 Difference]: Finished difference Result 118 states and 141 transitions. [2020-10-27 19:52:20,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 19:52:20,836 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 33 [2020-10-27 19:52:20,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:52:20,837 INFO L225 Difference]: With dead ends: 118 [2020-10-27 19:52:20,837 INFO L226 Difference]: Without dead ends: 84 [2020-10-27 19:52:20,838 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-10-27 19:52:20,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-27 19:52:20,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 78. [2020-10-27 19:52:20,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-27 19:52:20,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 91 transitions. [2020-10-27 19:52:20,848 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 91 transitions. Word has length 33 [2020-10-27 19:52:20,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:52:20,848 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 91 transitions. [2020-10-27 19:52:20,848 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 19:52:20,848 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 91 transitions. [2020-10-27 19:52:20,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-27 19:52:20,849 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:52:20,849 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:52:20,849 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-27 19:52:20,849 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:52:20,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:52:20,850 INFO L82 PathProgramCache]: Analyzing trace with hash -536299677, now seen corresponding path program 7 times [2020-10-27 19:52:20,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:52:20,850 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [627473771] [2020-10-27 19:52:20,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:52:20,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:52:20,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:52:22,133 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:52:22,134 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-27 19:52:22,134 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:52:22,134 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1230 [2020-10-27 19:52:22,134 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:52:22,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 19:52:22,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:52:22,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-27 19:52:22,134 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:52:22,327 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 39 [2020-10-27 19:52:22,503 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 49 [2020-10-27 19:52:22,749 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 51 [2020-10-27 19:52:22,886 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 50 [2020-10-27 19:52:23,029 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 57 [2020-10-27 19:52:23,478 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:52:23,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:52:23,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:52:23,484 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:52:23,485 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:52:23,485 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:52:23,485 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 19:52:23,485 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:52:23,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:52:23,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:52:23,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:52:23,485 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:52:23,500 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:52:23,501 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [627473771] [2020-10-27 19:52:23,501 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:52:23,501 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 19:52:23,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468121146] [2020-10-27 19:52:23,502 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 19:52:23,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:52:23,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 19:52:23,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2020-10-27 19:52:23,502 INFO L87 Difference]: Start difference. First operand 78 states and 91 transitions. Second operand 14 states. [2020-10-27 19:52:23,834 WARN L193 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 71 [2020-10-27 19:52:24,207 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 70 [2020-10-27 19:52:24,404 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 57 [2020-10-27 19:52:24,634 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 58 [2020-10-27 19:52:24,878 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 50 [2020-10-27 19:52:25,173 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 51 [2020-10-27 19:52:25,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:52:25,703 INFO L93 Difference]: Finished difference Result 97 states and 116 transitions. [2020-10-27 19:52:25,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 19:52:25,704 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 35 [2020-10-27 19:52:25,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:52:25,705 INFO L225 Difference]: With dead ends: 97 [2020-10-27 19:52:25,706 INFO L226 Difference]: Without dead ends: 93 [2020-10-27 19:52:25,707 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=168, Invalid=482, Unknown=0, NotChecked=0, Total=650 [2020-10-27 19:52:25,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-27 19:52:25,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 73. [2020-10-27 19:52:25,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-27 19:52:25,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 87 transitions. [2020-10-27 19:52:25,721 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 87 transitions. Word has length 35 [2020-10-27 19:52:25,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:52:25,722 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 87 transitions. [2020-10-27 19:52:25,722 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 19:52:25,722 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 87 transitions. [2020-10-27 19:52:25,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-27 19:52:25,723 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:52:25,723 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:52:25,723 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-27 19:52:25,724 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:52:25,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:52:25,725 INFO L82 PathProgramCache]: Analyzing trace with hash -534452635, now seen corresponding path program 9 times [2020-10-27 19:52:25,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:52:25,725 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [660713919] [2020-10-27 19:52:25,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:52:25,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:52:25,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:52:26,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:52:28,099 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:52:28,099 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-27 19:52:28,099 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 19:52:28,099 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2305 [2020-10-27 19:52:28,099 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:52:28,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 19:52:28,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:52:28,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 19:52:28,100 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:52:28,311 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 40 [2020-10-27 19:52:28,506 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 51 [2020-10-27 19:52:28,732 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 54 [2020-10-27 19:52:28,879 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 52 [2020-10-27 19:52:29,384 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:52:29,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:52:29,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:52:29,390 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:52:29,390 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:52:29,390 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:52:29,390 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:52:29,390 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:52:29,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:52:29,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:52:29,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:52:29,391 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:52:29,407 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 3 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:52:29,407 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [660713919] [2020-10-27 19:52:29,407 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:52:29,407 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 19:52:29,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051608535] [2020-10-27 19:52:29,408 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 19:52:29,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:52:29,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 19:52:29,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2020-10-27 19:52:29,408 INFO L87 Difference]: Start difference. First operand 73 states and 87 transitions. Second operand 14 states. [2020-10-27 19:52:29,741 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 68 [2020-10-27 19:52:30,163 WARN L193 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 76 [2020-10-27 19:52:30,379 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 50 [2020-10-27 19:52:30,565 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 51 [2020-10-27 19:52:30,787 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2020-10-27 19:52:30,939 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 54 [2020-10-27 19:52:31,223 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 53 [2020-10-27 19:52:31,361 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 49 [2020-10-27 19:52:31,592 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 47 [2020-10-27 19:52:31,750 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 48 [2020-10-27 19:52:32,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:52:32,073 INFO L93 Difference]: Finished difference Result 98 states and 119 transitions. [2020-10-27 19:52:32,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-27 19:52:32,074 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 35 [2020-10-27 19:52:32,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:52:32,075 INFO L225 Difference]: With dead ends: 98 [2020-10-27 19:52:32,075 INFO L226 Difference]: Without dead ends: 89 [2020-10-27 19:52:32,076 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=183, Invalid=629, Unknown=0, NotChecked=0, Total=812 [2020-10-27 19:52:32,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-27 19:52:32,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 82. [2020-10-27 19:52:32,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-27 19:52:32,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 97 transitions. [2020-10-27 19:52:32,086 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 97 transitions. Word has length 35 [2020-10-27 19:52:32,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:52:32,086 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 97 transitions. [2020-10-27 19:52:32,086 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 19:52:32,086 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 97 transitions. [2020-10-27 19:52:32,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-27 19:52:32,087 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:52:32,087 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:52:32,087 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-27 19:52:32,087 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:52:32,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:52:32,088 INFO L82 PathProgramCache]: Analyzing trace with hash 1238707685, now seen corresponding path program 8 times [2020-10-27 19:52:32,088 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:52:32,088 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1114644393] [2020-10-27 19:52:32,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:52:32,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:52:32,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:52:33,443 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:52:33,443 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-27 19:52:33,443 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:52:33,444 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1300 [2020-10-27 19:52:33,444 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:52:33,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 19:52:33,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:52:33,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-27 19:52:33,444 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:52:33,781 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 52 [2020-10-27 19:52:33,933 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 52 [2020-10-27 19:52:34,069 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 54 [2020-10-27 19:52:34,551 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:52:34,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:52:34,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:52:34,557 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:52:34,557 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:52:34,557 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:52:34,557 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 19:52:34,557 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:52:34,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:52:34,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:52:34,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:52:34,558 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:52:34,579 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:52:34,579 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1114644393] [2020-10-27 19:52:34,579 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:52:34,580 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 19:52:34,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883174238] [2020-10-27 19:52:34,580 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 19:52:34,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:52:34,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 19:52:34,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2020-10-27 19:52:34,581 INFO L87 Difference]: Start difference. First operand 82 states and 97 transitions. Second operand 14 states. [2020-10-27 19:52:34,869 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 68 [2020-10-27 19:52:35,210 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 69 [2020-10-27 19:52:35,417 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 58 [2020-10-27 19:52:35,649 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 59 [2020-10-27 19:52:35,828 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 53 [2020-10-27 19:52:36,173 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 53 [2020-10-27 19:52:36,308 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 62 [2020-10-27 19:52:36,517 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 54 [2020-10-27 19:52:37,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:52:37,065 INFO L93 Difference]: Finished difference Result 93 states and 111 transitions. [2020-10-27 19:52:37,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 19:52:37,065 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 35 [2020-10-27 19:52:37,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:52:37,066 INFO L225 Difference]: With dead ends: 93 [2020-10-27 19:52:37,067 INFO L226 Difference]: Without dead ends: 89 [2020-10-27 19:52:37,067 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=203, Invalid=553, Unknown=0, NotChecked=0, Total=756 [2020-10-27 19:52:37,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-27 19:52:37,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 82. [2020-10-27 19:52:37,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-27 19:52:37,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 97 transitions. [2020-10-27 19:52:37,078 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 97 transitions. Word has length 35 [2020-10-27 19:52:37,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:52:37,078 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 97 transitions. [2020-10-27 19:52:37,079 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 19:52:37,079 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 97 transitions. [2020-10-27 19:52:37,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-27 19:52:37,079 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:52:37,079 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:52:37,080 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-27 19:52:37,080 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:52:37,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:52:37,080 INFO L82 PathProgramCache]: Analyzing trace with hash 1240554727, now seen corresponding path program 10 times [2020-10-27 19:52:37,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:52:37,081 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2127726328] [2020-10-27 19:52:37,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:52:37,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:52:37,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:52:37,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:52:39,821 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:52:39,822 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-27 19:52:39,822 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 19:52:39,822 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2681 [2020-10-27 19:52:39,822 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:52:39,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 19:52:39,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:52:39,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 19:52:39,822 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:52:40,192 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 46 [2020-10-27 19:52:40,892 WARN L193 SmtUtils]: Spent 667.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 74 [2020-10-27 19:52:41,437 WARN L193 SmtUtils]: Spent 521.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 65 [2020-10-27 19:52:41,886 WARN L193 SmtUtils]: Spent 412.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 80 [2020-10-27 19:52:42,181 WARN L193 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 64 [2020-10-27 19:52:42,378 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 54 [2020-10-27 19:52:42,859 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:52:42,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:52:42,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:52:42,865 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:52:42,866 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:52:42,866 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:52:42,866 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:52:42,866 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:52:42,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:52:42,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:52:42,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:52:42,866 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:52:42,884 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 3 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:52:42,884 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2127726328] [2020-10-27 19:52:42,885 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:52:42,885 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 19:52:42,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288516977] [2020-10-27 19:52:42,885 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 19:52:42,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:52:42,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 19:52:42,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-10-27 19:52:42,886 INFO L87 Difference]: Start difference. First operand 82 states and 97 transitions. Second operand 15 states. [2020-10-27 19:52:43,329 WARN L193 SmtUtils]: Spent 369.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 67 [2020-10-27 19:52:43,851 WARN L193 SmtUtils]: Spent 311.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 69 [2020-10-27 19:52:44,289 WARN L193 SmtUtils]: Spent 396.00 ms on a formula simplification. DAG size of input: 195 DAG size of output: 69 [2020-10-27 19:52:44,626 WARN L193 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 63 [2020-10-27 19:52:44,946 WARN L193 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 64 [2020-10-27 19:52:45,457 WARN L193 SmtUtils]: Spent 410.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 74 [2020-10-27 19:52:45,920 WARN L193 SmtUtils]: Spent 387.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 80 [2020-10-27 19:52:46,255 WARN L193 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 65 [2020-10-27 19:52:46,642 WARN L193 SmtUtils]: Spent 342.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 93 [2020-10-27 19:52:47,077 WARN L193 SmtUtils]: Spent 368.00 ms on a formula simplification. DAG size of input: 150 DAG size of output: 50 [2020-10-27 19:52:47,442 WARN L193 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 92 [2020-10-27 19:52:47,866 WARN L193 SmtUtils]: Spent 373.00 ms on a formula simplification. DAG size of input: 151 DAG size of output: 51 [2020-10-27 19:52:48,268 WARN L193 SmtUtils]: Spent 337.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 94 [2020-10-27 19:52:48,597 WARN L193 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 88 [2020-10-27 19:52:49,035 WARN L193 SmtUtils]: Spent 390.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 52 [2020-10-27 19:52:49,363 WARN L193 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 77 [2020-10-27 19:52:49,704 WARN L193 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 76 [2020-10-27 19:52:50,033 WARN L193 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 78 [2020-10-27 19:52:50,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:52:50,615 INFO L93 Difference]: Finished difference Result 96 states and 115 transitions. [2020-10-27 19:52:50,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-27 19:52:50,617 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 35 [2020-10-27 19:52:50,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:52:50,618 INFO L225 Difference]: With dead ends: 96 [2020-10-27 19:52:50,618 INFO L226 Difference]: Without dead ends: 54 [2020-10-27 19:52:50,619 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=357, Invalid=1049, Unknown=0, NotChecked=0, Total=1406 [2020-10-27 19:52:50,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-27 19:52:50,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 49. [2020-10-27 19:52:50,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-27 19:52:50,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 58 transitions. [2020-10-27 19:52:50,626 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 58 transitions. Word has length 35 [2020-10-27 19:52:50,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:52:50,627 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 58 transitions. [2020-10-27 19:52:50,627 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 19:52:50,627 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 58 transitions. [2020-10-27 19:52:50,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-27 19:52:50,627 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:52:50,628 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:52:50,628 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-27 19:52:50,628 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:52:50,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:52:50,628 INFO L82 PathProgramCache]: Analyzing trace with hash -276287197, now seen corresponding path program 11 times [2020-10-27 19:52:50,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:52:50,629 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [865502421] [2020-10-27 19:52:50,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:52:50,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:52:50,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:52:51,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:52:51,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:52:54,402 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:52:54,403 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-27 19:52:54,403 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 19:52:54,403 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3730 [2020-10-27 19:52:54,403 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:52:54,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 19:52:54,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:52:54,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-27 19:52:54,403 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:52:54,679 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 42 [2020-10-27 19:52:54,812 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 51 [2020-10-27 19:52:55,025 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 57 [2020-10-27 19:52:55,216 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 55 [2020-10-27 19:52:55,367 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 56 [2020-10-27 19:52:55,756 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:52:55,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:52:55,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:52:55,762 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:52:55,762 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:52:55,762 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:52:55,762 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:52:55,762 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:52:55,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:52:55,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:52:55,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:52:55,763 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:52:55,778 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:52:55,778 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [865502421] [2020-10-27 19:52:55,779 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:52:55,779 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 19:52:55,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624761393] [2020-10-27 19:52:55,779 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 19:52:55,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:52:55,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 19:52:55,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2020-10-27 19:52:55,780 INFO L87 Difference]: Start difference. First operand 49 states and 58 transitions. Second operand 14 states. [2020-10-27 19:52:56,132 WARN L193 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 67 [2020-10-27 19:52:56,573 WARN L193 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 83 [2020-10-27 19:52:56,863 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 66 [2020-10-27 19:52:57,059 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 56 [2020-10-27 19:52:57,245 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 55 [2020-10-27 19:52:57,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:52:57,796 INFO L93 Difference]: Finished difference Result 65 states and 78 transitions. [2020-10-27 19:52:57,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 19:52:57,797 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 35 [2020-10-27 19:52:57,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:52:57,798 INFO L225 Difference]: With dead ends: 65 [2020-10-27 19:52:57,798 INFO L226 Difference]: Without dead ends: 56 [2020-10-27 19:52:57,799 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=133, Invalid=419, Unknown=0, NotChecked=0, Total=552 [2020-10-27 19:52:57,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-27 19:52:57,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 49. [2020-10-27 19:52:57,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-27 19:52:57,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 58 transitions. [2020-10-27 19:52:57,808 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 58 transitions. Word has length 35 [2020-10-27 19:52:57,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:52:57,809 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 58 transitions. [2020-10-27 19:52:57,809 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 19:52:57,809 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 58 transitions. [2020-10-27 19:52:57,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-27 19:52:57,809 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:52:57,810 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:52:57,810 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-27 19:52:57,810 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:52:57,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:52:57,814 INFO L82 PathProgramCache]: Analyzing trace with hash 1498720165, now seen corresponding path program 12 times [2020-10-27 19:52:57,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:52:57,814 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [22926537] [2020-10-27 19:52:57,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:52:57,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:52:57,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:52:58,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:52:58,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:52:59,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:52:59,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:53:00,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:53:02,893 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:53:02,893 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-27 19:53:02,893 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 19:53:02,893 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-27 19:53:02,893 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:53:02,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 19:53:02,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:53:02,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 19:53:02,894 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:53:03,091 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 42 [2020-10-27 19:53:03,367 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 50 [2020-10-27 19:53:03,711 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:53:03,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:53:03,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:53:03,716 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:53:03,717 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:53:03,717 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:53:03,717 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:53:03,717 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:53:03,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:53:03,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:53:03,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:53:03,718 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:53:03,728 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 3 proven. 25 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-27 19:53:03,728 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [22926537] [2020-10-27 19:53:03,728 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:53:03,728 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 19:53:03,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684043128] [2020-10-27 19:53:03,729 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 19:53:03,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:53:03,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 19:53:03,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2020-10-27 19:53:03,730 INFO L87 Difference]: Start difference. First operand 49 states and 58 transitions. Second operand 13 states. [2020-10-27 19:53:03,975 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 68 [2020-10-27 19:53:04,298 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 68 [2020-10-27 19:53:04,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:53:04,794 INFO L93 Difference]: Finished difference Result 64 states and 78 transitions. [2020-10-27 19:53:04,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 19:53:04,796 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 35 [2020-10-27 19:53:04,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:53:04,797 INFO L225 Difference]: With dead ends: 64 [2020-10-27 19:53:04,797 INFO L226 Difference]: Without dead ends: 55 [2020-10-27 19:53:04,797 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2020-10-27 19:53:04,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-27 19:53:04,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 52. [2020-10-27 19:53:04,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-27 19:53:04,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 61 transitions. [2020-10-27 19:53:04,804 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 61 transitions. Word has length 35 [2020-10-27 19:53:04,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:53:04,804 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 61 transitions. [2020-10-27 19:53:04,804 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 19:53:04,804 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 61 transitions. [2020-10-27 19:53:04,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-27 19:53:04,804 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:53:04,805 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:53:04,805 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-27 19:53:04,805 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:53:04,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:53:04,805 INFO L82 PathProgramCache]: Analyzing trace with hash 739796126, now seen corresponding path program 9 times [2020-10-27 19:53:04,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:53:04,806 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1983010571] [2020-10-27 19:53:04,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:53:04,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:53:04,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:53:05,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:53:07,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:53:09,474 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:53:09,474 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-27 19:53:09,474 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 19:53:09,474 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4593 [2020-10-27 19:53:09,474 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:53:09,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 19:53:09,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:53:09,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-27 19:53:09,475 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:53:09,715 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 40 [2020-10-27 19:53:09,831 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 45 [2020-10-27 19:53:09,959 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 46 [2020-10-27 19:53:10,111 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 46 [2020-10-27 19:53:10,271 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 54 [2020-10-27 19:53:10,407 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 51 [2020-10-27 19:53:10,877 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:53:10,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:53:10,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:53:10,883 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:53:10,883 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:53:10,883 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:53:10,883 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:53:10,884 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:53:10,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:53:10,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:53:10,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:53:10,884 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:53:10,910 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 12 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:53:10,911 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1983010571] [2020-10-27 19:53:10,911 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:53:10,911 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 19:53:10,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954812362] [2020-10-27 19:53:10,912 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 19:53:10,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:53:10,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 19:53:10,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2020-10-27 19:53:10,913 INFO L87 Difference]: Start difference. First operand 52 states and 61 transitions. Second operand 15 states. [2020-10-27 19:53:11,282 WARN L193 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 74 [2020-10-27 19:53:11,793 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 79 [2020-10-27 19:53:12,126 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 52 [2020-10-27 19:53:12,288 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 52 [2020-10-27 19:53:12,473 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 54 [2020-10-27 19:53:12,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:53:12,978 INFO L93 Difference]: Finished difference Result 66 states and 78 transitions. [2020-10-27 19:53:12,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 19:53:12,979 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 40 [2020-10-27 19:53:12,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:53:12,979 INFO L225 Difference]: With dead ends: 66 [2020-10-27 19:53:12,980 INFO L226 Difference]: Without dead ends: 57 [2020-10-27 19:53:12,980 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2020-10-27 19:53:12,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-27 19:53:12,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-10-27 19:53:12,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-27 19:53:12,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 66 transitions. [2020-10-27 19:53:12,988 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 66 transitions. Word has length 40 [2020-10-27 19:53:12,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:53:12,989 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 66 transitions. [2020-10-27 19:53:12,989 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 19:53:12,989 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 66 transitions. [2020-10-27 19:53:12,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-27 19:53:12,990 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:53:12,990 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:53:12,990 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-27 19:53:12,990 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:53:12,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:53:12,991 INFO L82 PathProgramCache]: Analyzing trace with hash -1780163808, now seen corresponding path program 10 times [2020-10-27 19:53:12,991 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:53:12,991 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [998124186] [2020-10-27 19:53:12,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:53:13,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:53:13,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:53:15,007 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:53:15,008 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-27 19:53:15,008 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:53:15,008 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1908 [2020-10-27 19:53:15,008 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:53:15,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 19:53:15,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:53:15,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-27 19:53:15,008 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:53:15,274 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 40 [2020-10-27 19:53:15,387 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 45 [2020-10-27 19:53:15,559 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 49 [2020-10-27 19:53:15,720 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 49 [2020-10-27 19:53:15,916 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 53 [2020-10-27 19:53:16,066 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 48 [2020-10-27 19:53:16,211 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 53 [2020-10-27 19:53:16,695 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:53:16,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:53:16,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:53:16,701 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:53:16,701 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:53:16,701 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:53:16,701 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 19:53:16,701 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:53:16,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:53:16,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:53:16,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:53:16,702 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:53:16,722 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:53:16,722 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [998124186] [2020-10-27 19:53:16,722 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:53:16,722 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 19:53:16,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088063500] [2020-10-27 19:53:16,723 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 19:53:16,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:53:16,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 19:53:16,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2020-10-27 19:53:16,724 INFO L87 Difference]: Start difference. First operand 57 states and 66 transitions. Second operand 16 states. [2020-10-27 19:53:17,061 WARN L193 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 60 [2020-10-27 19:53:17,458 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 61 [2020-10-27 19:53:18,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:53:18,343 INFO L93 Difference]: Finished difference Result 73 states and 86 transitions. [2020-10-27 19:53:18,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 19:53:18,344 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 40 [2020-10-27 19:53:18,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:53:18,345 INFO L225 Difference]: With dead ends: 73 [2020-10-27 19:53:18,345 INFO L226 Difference]: Without dead ends: 69 [2020-10-27 19:53:18,346 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=92, Invalid=370, Unknown=0, NotChecked=0, Total=462 [2020-10-27 19:53:18,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-27 19:53:18,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 64. [2020-10-27 19:53:18,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-27 19:53:18,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 75 transitions. [2020-10-27 19:53:18,356 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 75 transitions. Word has length 40 [2020-10-27 19:53:18,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:53:18,356 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 75 transitions. [2020-10-27 19:53:18,356 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 19:53:18,356 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 75 transitions. [2020-10-27 19:53:18,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-27 19:53:18,357 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:53:18,357 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:53:18,357 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-27 19:53:18,357 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:53:18,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:53:18,358 INFO L82 PathProgramCache]: Analyzing trace with hash -1778316766, now seen corresponding path program 13 times [2020-10-27 19:53:18,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:53:18,358 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1799102254] [2020-10-27 19:53:18,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:53:18,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:53:18,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:53:19,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:53:21,584 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:53:21,584 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-27 19:53:21,584 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 19:53:21,584 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3146 [2020-10-27 19:53:21,584 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:53:21,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 19:53:21,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:53:21,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-27 19:53:21,585 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:53:21,814 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 39 [2020-10-27 19:53:21,969 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 44 [2020-10-27 19:53:22,155 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 46 [2020-10-27 19:53:22,340 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 46 [2020-10-27 19:53:22,517 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 53 [2020-10-27 19:53:22,770 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 52 [2020-10-27 19:53:23,186 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:53:23,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:53:23,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:53:23,191 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:53:23,191 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:53:23,191 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:53:23,191 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:53:23,191 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:53:23,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:53:23,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:53:23,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:53:23,192 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:53:23,219 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:53:23,220 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1799102254] [2020-10-27 19:53:23,220 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:53:23,220 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 19:53:23,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291847303] [2020-10-27 19:53:23,220 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 19:53:23,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:53:23,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 19:53:23,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2020-10-27 19:53:23,221 INFO L87 Difference]: Start difference. First operand 64 states and 75 transitions. Second operand 16 states. [2020-10-27 19:53:23,582 WARN L193 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 67 [2020-10-27 19:53:24,002 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 74 [2020-10-27 19:53:24,264 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 53 [2020-10-27 19:53:24,429 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 57 [2020-10-27 19:53:24,593 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 56 [2020-10-27 19:53:25,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:53:25,206 INFO L93 Difference]: Finished difference Result 78 states and 93 transitions. [2020-10-27 19:53:25,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 19:53:25,207 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 40 [2020-10-27 19:53:25,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:53:25,209 INFO L225 Difference]: With dead ends: 78 [2020-10-27 19:53:25,209 INFO L226 Difference]: Without dead ends: 69 [2020-10-27 19:53:25,210 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=92, Invalid=508, Unknown=0, NotChecked=0, Total=600 [2020-10-27 19:53:25,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-27 19:53:25,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 64. [2020-10-27 19:53:25,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-27 19:53:25,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 75 transitions. [2020-10-27 19:53:25,217 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 75 transitions. Word has length 40 [2020-10-27 19:53:25,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:53:25,218 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 75 transitions. [2020-10-27 19:53:25,218 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 19:53:25,218 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 75 transitions. [2020-10-27 19:53:25,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-27 19:53:25,218 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:53:25,218 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:53:25,218 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-27 19:53:25,218 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:53:25,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:53:25,219 INFO L82 PathProgramCache]: Analyzing trace with hash 997961564, now seen corresponding path program 11 times [2020-10-27 19:53:25,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:53:25,219 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [121677435] [2020-10-27 19:53:25,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:53:25,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:53:25,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:53:26,995 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:53:26,995 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-27 19:53:26,995 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:53:26,995 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1696 [2020-10-27 19:53:26,995 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:53:26,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 19:53:26,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:53:26,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-27 19:53:26,996 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:53:27,282 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 44 [2020-10-27 19:53:27,442 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 50 [2020-10-27 19:53:27,682 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 56 [2020-10-27 19:53:27,882 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 55 [2020-10-27 19:53:28,062 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 57 [2020-10-27 19:53:28,222 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 50 [2020-10-27 19:53:28,790 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:53:28,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:53:28,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:53:28,796 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:53:28,796 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:53:28,796 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:53:28,796 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:53:28,796 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:53:28,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:53:28,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:53:28,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:53:28,797 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:53:28,816 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:53:28,817 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [121677435] [2020-10-27 19:53:28,817 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:53:28,817 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 19:53:28,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654023577] [2020-10-27 19:53:28,817 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 19:53:28,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:53:28,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 19:53:28,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2020-10-27 19:53:28,818 INFO L87 Difference]: Start difference. First operand 64 states and 75 transitions. Second operand 16 states. [2020-10-27 19:53:29,145 WARN L193 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 65 [2020-10-27 19:53:29,510 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 65 [2020-10-27 19:53:29,781 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 60 [2020-10-27 19:53:29,964 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 61 [2020-10-27 19:53:30,159 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 62 [2020-10-27 19:53:31,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:53:31,332 INFO L93 Difference]: Finished difference Result 90 states and 107 transitions. [2020-10-27 19:53:31,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-27 19:53:31,333 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 40 [2020-10-27 19:53:31,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:53:31,334 INFO L225 Difference]: With dead ends: 90 [2020-10-27 19:53:31,334 INFO L226 Difference]: Without dead ends: 86 [2020-10-27 19:53:31,335 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=168, Invalid=762, Unknown=0, NotChecked=0, Total=930 [2020-10-27 19:53:31,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-27 19:53:31,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 74. [2020-10-27 19:53:31,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-27 19:53:31,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 87 transitions. [2020-10-27 19:53:31,342 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 87 transitions. Word has length 40 [2020-10-27 19:53:31,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:53:31,342 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 87 transitions. [2020-10-27 19:53:31,342 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 19:53:31,342 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 87 transitions. [2020-10-27 19:53:31,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-27 19:53:31,342 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:53:31,343 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:53:31,343 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-27 19:53:31,343 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:53:31,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:53:31,343 INFO L82 PathProgramCache]: Analyzing trace with hash 999808606, now seen corresponding path program 14 times [2020-10-27 19:53:31,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:53:31,343 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [303332075] [2020-10-27 19:53:31,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:53:31,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:53:31,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:53:32,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:53:33,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:53:34,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:53:36,416 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:53:36,416 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-27 19:53:36,416 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 19:53:36,416 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-27 19:53:36,416 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:53:36,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 19:53:36,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:53:36,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-27 19:53:36,417 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:53:36,718 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 40 [2020-10-27 19:53:36,882 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 45 [2020-10-27 19:53:37,194 WARN L193 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 53 [2020-10-27 19:53:37,399 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 54 [2020-10-27 19:53:37,642 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 58 [2020-10-27 19:53:37,840 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 53 [2020-10-27 19:53:38,015 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 55 [2020-10-27 19:53:38,287 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 49 [2020-10-27 19:53:38,442 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 47 [2020-10-27 19:53:38,737 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:53:38,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:53:38,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:53:38,742 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:53:38,742 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:53:38,742 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:53:38,742 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:53:38,742 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:53:38,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:53:38,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:53:38,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:53:38,743 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:53:38,766 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 4 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:53:38,766 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [303332075] [2020-10-27 19:53:38,767 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:53:38,767 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-27 19:53:38,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682497127] [2020-10-27 19:53:38,767 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-27 19:53:38,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:53:38,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-27 19:53:38,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2020-10-27 19:53:38,768 INFO L87 Difference]: Start difference. First operand 74 states and 87 transitions. Second operand 17 states. [2020-10-27 19:53:39,133 WARN L193 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 60 [2020-10-27 19:53:39,542 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 66 [2020-10-27 19:53:39,867 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 68 [2020-10-27 19:53:40,054 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 48 [2020-10-27 19:53:40,246 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 52 [2020-10-27 19:53:40,460 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 51 [2020-10-27 19:53:40,925 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 51 [2020-10-27 19:53:41,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:53:41,219 INFO L93 Difference]: Finished difference Result 88 states and 105 transitions. [2020-10-27 19:53:41,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 19:53:41,220 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 40 [2020-10-27 19:53:41,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:53:41,221 INFO L225 Difference]: With dead ends: 88 [2020-10-27 19:53:41,222 INFO L226 Difference]: Without dead ends: 79 [2020-10-27 19:53:41,222 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=111, Invalid=539, Unknown=0, NotChecked=0, Total=650 [2020-10-27 19:53:41,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-27 19:53:41,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 74. [2020-10-27 19:53:41,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-27 19:53:41,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 87 transitions. [2020-10-27 19:53:41,230 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 87 transitions. Word has length 40 [2020-10-27 19:53:41,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:53:41,230 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 87 transitions. [2020-10-27 19:53:41,230 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-27 19:53:41,230 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 87 transitions. [2020-10-27 19:53:41,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-27 19:53:41,231 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:53:41,231 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:53:41,231 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-27 19:53:41,231 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:53:41,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:53:41,231 INFO L82 PathProgramCache]: Analyzing trace with hash -1520151328, now seen corresponding path program 15 times [2020-10-27 19:53:41,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:53:41,232 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1054407041] [2020-10-27 19:53:41,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:53:41,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:53:41,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:53:42,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:53:43,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:53:44,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:53:44,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:53:45,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:53:45,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:53:46,301 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:53:46,301 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-27 19:53:46,301 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 19:53:46,302 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-27 19:53:46,302 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:53:46,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 19:53:46,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:53:46,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-27 19:53:46,302 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:53:46,602 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 44 [2020-10-27 19:53:46,734 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 52 [2020-10-27 19:53:46,894 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 54 [2020-10-27 19:53:47,031 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 51 [2020-10-27 19:53:47,175 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 57 [2020-10-27 19:53:47,692 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:53:47,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:53:47,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:53:47,696 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:53:47,696 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:53:47,696 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:53:47,697 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:53:47,697 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:53:47,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:53:47,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:53:47,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:53:47,697 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:53:47,716 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 12 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:53:47,716 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1054407041] [2020-10-27 19:53:47,716 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:53:47,717 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 19:53:47,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590314672] [2020-10-27 19:53:47,717 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 19:53:47,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:53:47,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 19:53:47,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2020-10-27 19:53:47,718 INFO L87 Difference]: Start difference. First operand 74 states and 87 transitions. Second operand 15 states. [2020-10-27 19:53:48,083 WARN L193 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 70 [2020-10-27 19:53:48,432 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 72 [2020-10-27 19:53:48,722 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 74 [2020-10-27 19:53:48,918 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 58 [2020-10-27 19:53:49,091 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 64 [2020-10-27 19:53:49,290 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2020-10-27 19:53:49,455 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 54 [2020-10-27 19:53:49,633 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 56 [2020-10-27 19:53:49,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:53:49,962 INFO L93 Difference]: Finished difference Result 86 states and 101 transitions. [2020-10-27 19:53:49,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 19:53:49,966 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 40 [2020-10-27 19:53:49,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:53:49,967 INFO L225 Difference]: With dead ends: 86 [2020-10-27 19:53:49,967 INFO L226 Difference]: Without dead ends: 52 [2020-10-27 19:53:49,968 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=148, Invalid=502, Unknown=0, NotChecked=0, Total=650 [2020-10-27 19:53:49,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-27 19:53:49,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2020-10-27 19:53:49,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-27 19:53:49,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 58 transitions. [2020-10-27 19:53:49,975 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 58 transitions. Word has length 40 [2020-10-27 19:53:49,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:53:49,975 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 58 transitions. [2020-10-27 19:53:49,975 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 19:53:49,975 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 58 transitions. [2020-10-27 19:53:49,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-27 19:53:49,976 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:53:49,976 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:53:49,976 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-27 19:53:49,976 INFO L429 AbstractCegarLoop]: === Iteration 43 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:53:49,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:53:49,977 INFO L82 PathProgramCache]: Analyzing trace with hash -1143075071, now seen corresponding path program 12 times [2020-10-27 19:53:49,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:53:49,977 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1894483193] [2020-10-27 19:53:49,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:53:50,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:53:50,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:53:51,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:53:55,136 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:53:55,136 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-27 19:53:55,136 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 19:53:55,136 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-27 19:53:55,137 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:53:55,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 19:53:55,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:53:55,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-27 19:53:55,137 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:53:55,513 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 39 [2020-10-27 19:53:55,671 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 50 [2020-10-27 19:53:55,862 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 47 [2020-10-27 19:53:56,064 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 47 [2020-10-27 19:53:56,235 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 58 [2020-10-27 19:53:56,397 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 52 [2020-10-27 19:53:56,596 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 58 [2020-10-27 19:53:56,747 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 50 [2020-10-27 19:53:56,910 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 54 [2020-10-27 19:53:57,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:53:57,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:53:57,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:53:57,276 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:53:57,276 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:53:57,276 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:53:57,277 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:53:57,277 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:53:57,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:53:57,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:53:57,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:53:57,277 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:53:57,304 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 15 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:53:57,304 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1894483193] [2020-10-27 19:53:57,304 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:53:57,304 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-27 19:53:57,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201357244] [2020-10-27 19:53:57,305 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-27 19:53:57,305 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:53:57,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-27 19:53:57,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2020-10-27 19:53:57,305 INFO L87 Difference]: Start difference. First operand 52 states and 58 transitions. Second operand 17 states. [2020-10-27 19:53:57,749 WARN L193 SmtUtils]: Spent 311.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 78 [2020-10-27 19:53:58,358 WARN L193 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 85 [2020-10-27 19:53:58,736 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 55 [2020-10-27 19:53:58,943 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 63 [2020-10-27 19:53:59,176 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 65 [2020-10-27 19:53:59,469 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 56 [2020-10-27 19:53:59,675 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 61 [2020-10-27 19:53:59,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:53:59,963 INFO L93 Difference]: Finished difference Result 66 states and 75 transitions. [2020-10-27 19:53:59,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 19:53:59,964 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 45 [2020-10-27 19:53:59,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:53:59,965 INFO L225 Difference]: With dead ends: 66 [2020-10-27 19:53:59,965 INFO L226 Difference]: Without dead ends: 57 [2020-10-27 19:53:59,966 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=112, Invalid=590, Unknown=0, NotChecked=0, Total=702 [2020-10-27 19:53:59,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-27 19:53:59,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-10-27 19:53:59,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-27 19:53:59,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 63 transitions. [2020-10-27 19:53:59,975 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 63 transitions. Word has length 45 [2020-10-27 19:53:59,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:53:59,975 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 63 transitions. [2020-10-27 19:53:59,975 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-27 19:53:59,975 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 63 transitions. [2020-10-27 19:53:59,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-27 19:53:59,976 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:53:59,976 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:53:59,976 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-27 19:53:59,976 INFO L429 AbstractCegarLoop]: === Iteration 44 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:53:59,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:53:59,977 INFO L82 PathProgramCache]: Analyzing trace with hash 631932291, now seen corresponding path program 13 times [2020-10-27 19:53:59,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:53:59,977 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [840656404] [2020-10-27 19:53:59,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:54:00,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:54:00,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:54:03,165 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:54:03,165 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-27 19:54:03,165 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:54:03,165 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3110 [2020-10-27 19:54:03,165 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:54:03,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 19:54:03,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:54:03,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-27 19:54:03,166 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:54:03,469 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 38 [2020-10-27 19:54:03,680 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 50 [2020-10-27 19:54:03,925 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 53 [2020-10-27 19:54:04,100 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 54 [2020-10-27 19:54:04,424 WARN L193 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 62 [2020-10-27 19:54:04,646 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 56 [2020-10-27 19:54:04,935 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 63 [2020-10-27 19:54:05,136 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 57 [2020-10-27 19:54:05,356 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 54 [2020-10-27 19:54:05,910 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:54:05,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:54:05,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:54:05,916 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:54:05,917 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:54:05,917 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:54:05,917 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 19:54:05,917 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:54:05,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:54:05,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:54:05,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:54:05,917 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:54:05,948 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:54:05,948 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [840656404] [2020-10-27 19:54:05,949 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:54:05,949 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-27 19:54:05,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90843343] [2020-10-27 19:54:05,949 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-27 19:54:05,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:54:05,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-27 19:54:05,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2020-10-27 19:54:05,950 INFO L87 Difference]: Start difference. First operand 57 states and 63 transitions. Second operand 18 states. [2020-10-27 19:54:06,403 WARN L193 SmtUtils]: Spent 388.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 60 [2020-10-27 19:54:06,947 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 62 [2020-10-27 19:54:07,814 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 60 [2020-10-27 19:54:08,006 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 61 [2020-10-27 19:54:08,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:54:08,660 INFO L93 Difference]: Finished difference Result 68 states and 77 transitions. [2020-10-27 19:54:08,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-27 19:54:08,662 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 45 [2020-10-27 19:54:08,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:54:08,663 INFO L225 Difference]: With dead ends: 68 [2020-10-27 19:54:08,663 INFO L226 Difference]: Without dead ends: 64 [2020-10-27 19:54:08,664 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=168, Invalid=702, Unknown=0, NotChecked=0, Total=870 [2020-10-27 19:54:08,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-27 19:54:08,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 59. [2020-10-27 19:54:08,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-27 19:54:08,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 66 transitions. [2020-10-27 19:54:08,671 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 66 transitions. Word has length 45 [2020-10-27 19:54:08,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:54:08,671 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 66 transitions. [2020-10-27 19:54:08,671 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-27 19:54:08,672 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 66 transitions. [2020-10-27 19:54:08,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-27 19:54:08,672 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:54:08,672 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:54:08,672 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-27 19:54:08,673 INFO L429 AbstractCegarLoop]: === Iteration 45 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:54:08,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:54:08,673 INFO L82 PathProgramCache]: Analyzing trace with hash 633779333, now seen corresponding path program 16 times [2020-10-27 19:54:08,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:54:08,673 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [956115186] [2020-10-27 19:54:08,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:54:08,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:54:08,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:54:09,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:54:13,579 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:54:13,579 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-27 19:54:13,580 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 19:54:13,580 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4826 [2020-10-27 19:54:13,580 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:54:13,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 19:54:13,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:54:13,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-27 19:54:13,580 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:54:13,959 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 39 [2020-10-27 19:54:14,098 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 46 [2020-10-27 19:54:14,345 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 56 [2020-10-27 19:54:14,555 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 54 [2020-10-27 19:54:14,730 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 56 [2020-10-27 19:54:14,891 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 51 [2020-10-27 19:54:15,105 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 58 [2020-10-27 19:54:15,279 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 53 [2020-10-27 19:54:15,422 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 51 [2020-10-27 19:54:15,981 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:54:15,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:54:15,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:54:15,987 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:54:15,987 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:54:15,987 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:54:15,988 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 19:54:15,988 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:54:15,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:54:15,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:54:15,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:54:15,988 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:54:16,017 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 5 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:54:16,017 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [956115186] [2020-10-27 19:54:16,017 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:54:16,017 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-27 19:54:16,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378332107] [2020-10-27 19:54:16,018 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-27 19:54:16,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:54:16,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-27 19:54:16,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2020-10-27 19:54:16,018 INFO L87 Difference]: Start difference. First operand 59 states and 66 transitions. Second operand 18 states. [2020-10-27 19:54:16,454 WARN L193 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 63 [2020-10-27 19:54:17,070 WARN L193 SmtUtils]: Spent 343.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 70 [2020-10-27 19:54:17,390 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 58 [2020-10-27 19:54:17,586 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 60 [2020-10-27 19:54:17,779 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 59 [2020-10-27 19:54:18,197 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 55 [2020-10-27 19:54:18,398 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 54 [2020-10-27 19:54:18,594 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 59 [2020-10-27 19:54:19,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:54:19,177 INFO L93 Difference]: Finished difference Result 71 states and 81 transitions. [2020-10-27 19:54:19,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-27 19:54:19,179 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 45 [2020-10-27 19:54:19,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:54:19,180 INFO L225 Difference]: With dead ends: 71 [2020-10-27 19:54:19,180 INFO L226 Difference]: Without dead ends: 62 [2020-10-27 19:54:19,181 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=181, Invalid=811, Unknown=0, NotChecked=0, Total=992 [2020-10-27 19:54:19,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-27 19:54:19,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 57. [2020-10-27 19:54:19,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-27 19:54:19,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 63 transitions. [2020-10-27 19:54:19,189 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 63 transitions. Word has length 45 [2020-10-27 19:54:19,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:54:19,189 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 63 transitions. [2020-10-27 19:54:19,189 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-27 19:54:19,189 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 63 transitions. [2020-10-27 19:54:19,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-27 19:54:19,189 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:54:19,189 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:54:19,190 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-27 19:54:19,190 INFO L429 AbstractCegarLoop]: === Iteration 46 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:54:19,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:54:19,190 INFO L82 PathProgramCache]: Analyzing trace with hash 1305378885, now seen corresponding path program 14 times [2020-10-27 19:54:19,190 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:54:19,190 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [119689262] [2020-10-27 19:54:19,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:54:19,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:54:19,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:54:20,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:54:23,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:54:24,805 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:54:24,805 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-27 19:54:24,805 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 19:54:24,806 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5506 [2020-10-27 19:54:24,806 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:54:24,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 19:54:24,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:54:24,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-27 19:54:24,806 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:54:25,179 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 43 [2020-10-27 19:54:25,354 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 58 [2020-10-27 19:54:25,549 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 52 [2020-10-27 19:54:25,742 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 57 [2020-10-27 19:54:25,933 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 59 [2020-10-27 19:54:26,139 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 52 [2020-10-27 19:54:26,329 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 60 [2020-10-27 19:54:26,482 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 54 [2020-10-27 19:54:26,643 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 57 [2020-10-27 19:54:27,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:54:27,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:54:27,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:54:27,236 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:54:27,236 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:54:27,236 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:54:27,236 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:54:27,236 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:54:27,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:54:27,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:54:27,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:54:27,237 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:54:27,267 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:54:27,267 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [119689262] [2020-10-27 19:54:27,267 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:54:27,267 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-27 19:54:27,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454616477] [2020-10-27 19:54:27,267 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-27 19:54:27,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:54:27,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-27 19:54:27,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2020-10-27 19:54:27,268 INFO L87 Difference]: Start difference. First operand 57 states and 63 transitions. Second operand 18 states. [2020-10-27 19:54:27,770 WARN L193 SmtUtils]: Spent 406.00 ms on a formula simplification. DAG size of input: 154 DAG size of output: 78 [2020-10-27 19:54:28,388 WARN L193 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 78 [2020-10-27 19:54:28,711 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 60 [2020-10-27 19:54:28,897 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 61 [2020-10-27 19:54:29,092 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 62 [2020-10-27 19:54:29,337 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 56 [2020-10-27 19:54:29,525 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 56 [2020-10-27 19:54:29,715 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 57 [2020-10-27 19:54:29,945 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 50 [2020-10-27 19:54:30,172 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 59 [2020-10-27 19:54:30,392 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 60 [2020-10-27 19:54:30,669 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 59 [2020-10-27 19:54:31,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:54:31,236 INFO L93 Difference]: Finished difference Result 73 states and 83 transitions. [2020-10-27 19:54:31,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-27 19:54:31,238 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 45 [2020-10-27 19:54:31,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:54:31,239 INFO L225 Difference]: With dead ends: 73 [2020-10-27 19:54:31,239 INFO L226 Difference]: Without dead ends: 69 [2020-10-27 19:54:31,240 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=229, Invalid=961, Unknown=0, NotChecked=0, Total=1190 [2020-10-27 19:54:31,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-27 19:54:31,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 64. [2020-10-27 19:54:31,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-27 19:54:31,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 72 transitions. [2020-10-27 19:54:31,249 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 72 transitions. Word has length 45 [2020-10-27 19:54:31,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:54:31,249 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 72 transitions. [2020-10-27 19:54:31,250 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-27 19:54:31,250 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 72 transitions. [2020-10-27 19:54:31,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-27 19:54:31,250 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:54:31,250 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:54:31,251 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-27 19:54:31,251 INFO L429 AbstractCegarLoop]: === Iteration 47 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:54:31,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:54:31,251 INFO L82 PathProgramCache]: Analyzing trace with hash 1307225927, now seen corresponding path program 17 times [2020-10-27 19:54:31,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:54:31,251 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1440435187] [2020-10-27 19:54:31,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:54:31,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:54:31,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:54:32,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:54:34,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking...