/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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --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/eca-rers2012/Problem06_label44.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 11:06:00,231 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 11:06:00,234 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 11:06:00,272 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 11:06:00,273 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 11:06:00,274 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 11:06:00,279 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 11:06:00,283 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 11:06:00,288 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 11:06:00,291 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 11:06:00,293 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 11:06:00,296 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 11:06:00,297 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 11:06:00,302 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 11:06:00,304 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 11:06:00,308 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 11:06:00,309 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 11:06:00,311 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 11:06:00,318 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 11:06:00,322 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 11:06:00,328 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 11:06:00,330 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 11:06:00,332 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 11:06:00,334 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 11:06:00,344 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 11:06:00,345 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 11:06:00,345 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 11:06:00,348 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 11:06:00,349 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 11:06:00,350 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 11:06:00,351 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 11:06:00,352 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 11:06:00,354 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 11:06:00,355 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 11:06:00,357 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 11:06:00,357 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 11:06:00,358 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 11:06:00,358 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 11:06:00,359 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 11:06:00,360 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 11:06:00,361 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 11:06:00,362 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 [2020-10-28 11:06:00,429 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 11:06:00,430 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 11:06:00,433 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 11:06:00,434 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 11:06:00,434 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 11:06:00,434 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 11:06:00,435 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 11:06:00,435 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 11:06:00,435 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 11:06:00,435 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 11:06:00,436 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 11:06:00,436 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 11:06:00,437 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 11:06:00,437 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 11:06:00,437 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 11:06:00,437 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 11:06:00,437 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 11:06:00,438 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 11:06:00,438 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 11:06:00,438 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 11:06:00,438 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 11:06:00,439 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 11:06:00,439 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 11:06:00,439 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 11:06:00,439 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 11:06:00,439 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 11:06:00,439 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 11:06:00,440 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 11:06:00,440 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 11:06:00,440 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 11:06:00,861 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 11:06:00,899 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 11:06:00,902 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 11:06:00,904 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 11:06:00,904 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 11:06:00,905 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem06_label44.c [2020-10-28 11:06:01,007 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1596e27dc/f79de3b790cf43f4b247783e54f197b6/FLAG6e4552b47 [2020-10-28 11:06:02,157 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 11:06:02,158 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem06_label44.c [2020-10-28 11:06:02,240 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1596e27dc/f79de3b790cf43f4b247783e54f197b6/FLAG6e4552b47 [2020-10-28 11:06:02,486 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1596e27dc/f79de3b790cf43f4b247783e54f197b6 [2020-10-28 11:06:02,491 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 11:06:02,498 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 11:06:02,503 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 11:06:02,503 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 11:06:02,507 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 11:06:02,507 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 11:06:02" (1/1) ... [2020-10-28 11:06:02,512 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1e81f713 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:06:02, skipping insertion in model container [2020-10-28 11:06:02,512 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 11:06:02" (1/1) ... [2020-10-28 11:06:02,521 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 11:06:02,763 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 11:06:04,827 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 11:06:04,839 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 11:06:05,952 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 11:06:06,011 INFO L208 MainTranslator]: Completed translation [2020-10-28 11:06:06,012 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:06:06 WrapperNode [2020-10-28 11:06:06,012 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 11:06:06,013 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 11:06:06,014 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 11:06:06,014 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 11:06:06,027 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:06:06" (1/1) ... [2020-10-28 11:06:06,027 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:06:06" (1/1) ... [2020-10-28 11:06:06,114 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:06:06" (1/1) ... [2020-10-28 11:06:06,115 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:06:06" (1/1) ... [2020-10-28 11:06:06,433 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:06:06" (1/1) ... [2020-10-28 11:06:06,476 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:06:06" (1/1) ... [2020-10-28 11:06:06,526 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:06:06" (1/1) ... [2020-10-28 11:06:06,597 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 11:06:06,599 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 11:06:06,599 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 11:06:06,599 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 11:06:06,600 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:06:06" (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 [2020-10-28 11:06:06,678 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 11:06:06,678 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 11:06:06,679 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 11:06:06,679 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-28 11:06:06,679 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-28 11:06:06,679 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-28 11:06:06,680 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-28 11:06:06,680 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2020-10-28 11:06:06,680 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 11:06:06,680 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-28 11:06:06,681 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-28 11:06:06,681 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-28 11:06:06,681 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-28 11:06:06,681 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2020-10-28 11:06:06,682 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 11:06:06,682 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 11:06:06,683 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 11:06:06,683 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 11:06:06,683 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-28 11:06:06,683 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-28 11:06:06,683 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 11:06:06,684 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 11:06:06,684 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 11:06:06,684 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 11:06:06,684 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 11:06:06,684 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 11:06:06,684 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 11:06:14,384 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 11:06:14,385 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-28 11:06:14,391 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 11:06:14 BoogieIcfgContainer [2020-10-28 11:06:14,392 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 11:06:14,393 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 11:06:14,393 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 11:06:14,402 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 11:06:14,402 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 11:06:02" (1/3) ... [2020-10-28 11:06:14,403 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@591151f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 11:06:14, skipping insertion in model container [2020-10-28 11:06:14,403 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:06:06" (2/3) ... [2020-10-28 11:06:14,403 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@591151f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 11:06:14, skipping insertion in model container [2020-10-28 11:06:14,403 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 11:06:14" (3/3) ... [2020-10-28 11:06:14,406 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem06_label44.c [2020-10-28 11:06:14,418 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 11:06:14,425 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 11:06:14,439 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 11:06:14,487 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 11:06:14,487 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 11:06:14,487 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 11:06:14,487 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 11:06:14,488 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 11:06:14,488 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 11:06:14,488 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 11:06:14,488 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 11:06:14,538 INFO L276 IsEmpty]: Start isEmpty. Operand 1319 states. [2020-10-28 11:06:14,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 949 [2020-10-28 11:06:14,615 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 11:06:14,617 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 11:06:14,618 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 11:06:14,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 11:06:14,628 INFO L82 PathProgramCache]: Analyzing trace with hash -522665704, now seen corresponding path program 1 times [2020-10-28 11:06:14,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 11:06:14,638 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2064003465] [2020-10-28 11:06:14,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 11:06:15,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 11:06:16,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:06:17,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:06:20,880 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 11:06:20,881 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 966 [2020-10-28 11:06:20,881 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 11:06:20,881 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5055 [2020-10-28 11:06:20,885 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 11:06:20,885 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 11:06:20,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 11:06:20,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 11:06:20,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 957 [2020-10-28 11:06:20,886 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-28 11:06:22,341 WARN L193 SmtUtils]: Spent 263.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 11:06:22,348 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 11:06:22,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 11:06:22,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:06:22,418 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 11:06:22,419 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 11:06:22,419 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 11:06:22,419 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 37 [2020-10-28 11:06:22,420 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 11:06:22,420 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 11:06:22,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 11:06:22,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 11:06:22,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 11:06:22,421 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 11:06:24,287 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 11:06:24,288 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2064003465] [2020-10-28 11:06:24,291 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 11:06:24,292 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-28 11:06:24,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17866221] [2020-10-28 11:06:24,303 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 11:06:24,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 11:06:24,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 11:06:24,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 11:06:24,328 INFO L87 Difference]: Start difference. First operand 1319 states. Second operand 4 states. [2020-10-28 11:06:24,654 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-28 11:06:41,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 11:06:41,406 INFO L93 Difference]: Finished difference Result 3770 states and 7012 transitions. [2020-10-28 11:06:41,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 11:06:41,408 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 948 [2020-10-28 11:06:41,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 11:06:41,458 INFO L225 Difference]: With dead ends: 3770 [2020-10-28 11:06:41,459 INFO L226 Difference]: Without dead ends: 2387 [2020-10-28 11:06:41,469 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 11:06:41,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2387 states. [2020-10-28 11:06:41,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2387 to 2374. [2020-10-28 11:06:41,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2374 states. [2020-10-28 11:06:41,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2374 states to 2374 states and 3972 transitions. [2020-10-28 11:06:41,661 INFO L78 Accepts]: Start accepts. Automaton has 2374 states and 3972 transitions. Word has length 948 [2020-10-28 11:06:41,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 11:06:41,663 INFO L481 AbstractCegarLoop]: Abstraction has 2374 states and 3972 transitions. [2020-10-28 11:06:41,663 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 11:06:41,664 INFO L276 IsEmpty]: Start isEmpty. Operand 2374 states and 3972 transitions. [2020-10-28 11:06:41,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 961 [2020-10-28 11:06:41,709 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 11:06:41,710 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 11:06:41,710 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 11:06:41,710 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 11:06:41,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 11:06:41,712 INFO L82 PathProgramCache]: Analyzing trace with hash 524155985, now seen corresponding path program 1 times [2020-10-28 11:06:41,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 11:06:41,712 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1922264835] [2020-10-28 11:06:41,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 11:06:41,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 11:06:41,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:06:43,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:06:47,036 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 11:06:47,036 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 980 [2020-10-28 11:06:47,037 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 11:06:47,037 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5180 [2020-10-28 11:06:47,037 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 11:06:47,037 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 11:06:47,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 11:06:47,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 11:06:47,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-28 11:06:47,038 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 11:06:47,505 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 11:06:47,507 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 11:06:47,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 11:06:47,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:06:47,549 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 11:06:47,550 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 11:06:47,550 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 11:06:47,550 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 32 [2020-10-28 11:06:47,550 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 11:06:47,551 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 11:06:47,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 11:06:47,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 11:06:47,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 11:06:47,551 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 11:06:47,659 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 11:06:47,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 11:06:47,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:06:47,718 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 11:06:47,718 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-10-28 11:06:47,718 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 11:06:47,719 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 45 [2020-10-28 11:06:47,719 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 11:06:47,719 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 11:06:47,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 11:06:47,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 11:06:47,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-28 11:06:47,720 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 11:06:48,223 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 11:06:48,224 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1922264835] [2020-10-28 11:06:48,224 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 11:06:48,224 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 11:06:48,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778103362] [2020-10-28 11:06:48,227 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 11:06:48,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 11:06:48,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 11:06:48,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 11:06:48,229 INFO L87 Difference]: Start difference. First operand 2374 states and 3972 transitions. Second operand 7 states. [2020-10-28 11:06:48,500 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-28 11:06:49,559 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-28 11:07:08,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 11:07:08,429 INFO L93 Difference]: Finished difference Result 5946 states and 9786 transitions. [2020-10-28 11:07:08,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 11:07:08,430 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 960 [2020-10-28 11:07:08,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 11:07:08,457 INFO L225 Difference]: With dead ends: 5946 [2020-10-28 11:07:08,457 INFO L226 Difference]: Without dead ends: 3578 [2020-10-28 11:07:08,464 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-28 11:07:08,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3578 states. [2020-10-28 11:07:08,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3578 to 3487. [2020-10-28 11:07:08,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3487 states. [2020-10-28 11:07:08,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3487 states to 3487 states and 5481 transitions. [2020-10-28 11:07:08,593 INFO L78 Accepts]: Start accepts. Automaton has 3487 states and 5481 transitions. Word has length 960 [2020-10-28 11:07:08,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 11:07:08,594 INFO L481 AbstractCegarLoop]: Abstraction has 3487 states and 5481 transitions. [2020-10-28 11:07:08,594 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 11:07:08,594 INFO L276 IsEmpty]: Start isEmpty. Operand 3487 states and 5481 transitions. [2020-10-28 11:07:08,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 965 [2020-10-28 11:07:08,611 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 11:07:08,612 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 11:07:08,613 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 11:07:08,613 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 11:07:08,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 11:07:08,614 INFO L82 PathProgramCache]: Analyzing trace with hash -484909175, now seen corresponding path program 1 times [2020-10-28 11:07:08,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 11:07:08,616 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1422127557] [2020-10-28 11:07:08,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 11:07:08,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 11:07:08,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:07:10,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:07:13,993 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 11:07:13,993 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 984 [2020-10-28 11:07:13,993 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 11:07:13,993 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5266 [2020-10-28 11:07:13,993 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 11:07:13,995 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 11:07:13,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 11:07:13,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 11:07:13,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-28 11:07:13,996 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 11:07:14,453 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 11:07:14,454 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 11:07:14,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 11:07:14,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:07:14,487 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 11:07:14,488 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 11:07:14,488 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 11:07:14,488 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-28 11:07:14,488 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 11:07:14,488 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 11:07:14,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 11:07:14,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 11:07:14,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 11:07:14,489 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 11:07:14,602 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 11:07:14,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 11:07:14,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:07:14,661 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 11:07:14,661 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-10-28 11:07:14,661 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 11:07:14,661 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 49 [2020-10-28 11:07:14,661 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 11:07:14,662 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 11:07:14,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 11:07:14,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 11:07:14,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-28 11:07:14,662 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 11:07:15,488 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 11:07:15,488 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1422127557] [2020-10-28 11:07:15,488 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 11:07:15,488 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 11:07:15,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046292327] [2020-10-28 11:07:15,490 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 11:07:15,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 11:07:15,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 11:07:15,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 11:07:15,491 INFO L87 Difference]: Start difference. First operand 3487 states and 5481 transitions. Second operand 7 states. [2020-10-28 11:07:15,747 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-28 11:07:16,434 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-28 11:07:38,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 11:07:38,299 INFO L93 Difference]: Finished difference Result 10470 states and 16840 transitions. [2020-10-28 11:07:38,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 11:07:38,300 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 964 [2020-10-28 11:07:38,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 11:07:38,348 INFO L225 Difference]: With dead ends: 10470 [2020-10-28 11:07:38,349 INFO L226 Difference]: Without dead ends: 6989 [2020-10-28 11:07:38,360 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-10-28 11:07:38,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6989 states. [2020-10-28 11:07:38,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6989 to 6787. [2020-10-28 11:07:38,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6787 states. [2020-10-28 11:07:38,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6787 states to 6787 states and 10749 transitions. [2020-10-28 11:07:38,639 INFO L78 Accepts]: Start accepts. Automaton has 6787 states and 10749 transitions. Word has length 964 [2020-10-28 11:07:38,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 11:07:38,641 INFO L481 AbstractCegarLoop]: Abstraction has 6787 states and 10749 transitions. [2020-10-28 11:07:38,641 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 11:07:38,642 INFO L276 IsEmpty]: Start isEmpty. Operand 6787 states and 10749 transitions. [2020-10-28 11:07:38,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 969 [2020-10-28 11:07:38,702 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 11:07:38,703 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 11:07:38,704 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 11:07:38,704 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 11:07:38,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 11:07:38,705 INFO L82 PathProgramCache]: Analyzing trace with hash -906527022, now seen corresponding path program 1 times [2020-10-28 11:07:38,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 11:07:38,705 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1572075442] [2020-10-28 11:07:38,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 11:07:38,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 11:07:38,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:07:39,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:07:44,052 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 11:07:44,052 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 990 [2020-10-28 11:07:44,052 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 11:07:44,052 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5226 [2020-10-28 11:07:44,052 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 11:07:44,053 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 11:07:44,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 11:07:44,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-28 11:07:44,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-28 11:07:44,053 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 11:07:44,420 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 11:07:44,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 11:07:44,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 11:07:44,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:07:44,436 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 11:07:44,437 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 11:07:44,437 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 11:07:44,437 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 11:07:44,437 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 11:07:44,437 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 11:07:44,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 11:07:44,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 11:07:44,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 11:07:44,438 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 11:07:44,543 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 11:07:44,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 11:07:44,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:07:44,560 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 11:07:44,561 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 11:07:44,561 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 11:07:44,561 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 11:07:44,561 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 11:07:44,561 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 11:07:44,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 11:07:44,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 11:07:44,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-28 11:07:44,562 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 11:07:44,567 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-10-28 11:07:44,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 11:07:44,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:07:44,623 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 11:07:44,623 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-10-28 11:07:44,623 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 11:07:44,624 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 46 [2020-10-28 11:07:44,624 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 11:07:44,624 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 11:07:44,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 11:07:44,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 11:07:44,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-28 11:07:44,625 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 11:07:45,161 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 19 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 11:07:45,161 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1572075442] [2020-10-28 11:07:45,161 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 11:07:45,162 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 11:07:45,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639305812] [2020-10-28 11:07:45,163 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 11:07:45,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 11:07:45,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 11:07:45,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 11:07:45,164 INFO L87 Difference]: Start difference. First operand 6787 states and 10749 transitions. Second operand 7 states. [2020-10-28 11:07:45,516 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-28 11:07:46,003 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-28 11:08:17,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 11:08:17,471 INFO L93 Difference]: Finished difference Result 27133 states and 47425 transitions. [2020-10-28 11:08:17,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 11:08:17,472 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 968 [2020-10-28 11:08:17,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 11:08:17,583 INFO L225 Difference]: With dead ends: 27133 [2020-10-28 11:08:17,583 INFO L226 Difference]: Without dead ends: 20352 [2020-10-28 11:08:17,607 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-28 11:08:17,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20352 states. [2020-10-28 11:08:18,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20352 to 20165. [2020-10-28 11:08:18,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20165 states. [2020-10-28 11:08:18,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20165 states to 20165 states and 31673 transitions. [2020-10-28 11:08:18,315 INFO L78 Accepts]: Start accepts. Automaton has 20165 states and 31673 transitions. Word has length 968 [2020-10-28 11:08:18,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 11:08:18,316 INFO L481 AbstractCegarLoop]: Abstraction has 20165 states and 31673 transitions. [2020-10-28 11:08:18,316 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 11:08:18,316 INFO L276 IsEmpty]: Start isEmpty. Operand 20165 states and 31673 transitions. [2020-10-28 11:08:18,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 986 [2020-10-28 11:08:18,409 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 11:08:18,410 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 11:08:18,410 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 11:08:18,410 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 11:08:18,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 11:08:18,411 INFO L82 PathProgramCache]: Analyzing trace with hash -279630709, now seen corresponding path program 1 times [2020-10-28 11:08:18,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 11:08:18,412 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [897077017] [2020-10-28 11:08:18,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 11:08:18,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 11:08:18,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:08:18,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:08:23,647 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 11:08:23,648 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1007 [2020-10-28 11:08:23,648 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 11:08:23,648 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5098 [2020-10-28 11:08:23,648 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 11:08:23,648 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 11:08:23,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 11:08:23,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 11:08:23,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-28 11:08:23,648 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 11:08:24,083 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 11:08:24,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 11:08:24,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 11:08:24,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:08:24,114 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 11:08:24,115 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 11:08:24,115 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 11:08:24,115 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-28 11:08:24,115 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 11:08:24,115 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 11:08:24,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 11:08:24,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 11:08:24,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 11:08:24,116 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 11:08:24,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 11:08:24,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 11:08:24,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:08:24,311 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 11:08:24,311 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-28 11:08:24,311 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 11:08:24,311 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 71 [2020-10-28 11:08:24,312 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 11:08:24,312 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 11:08:24,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 11:08:24,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 11:08:24,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-28 11:08:24,312 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 11:08:24,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-10-28 11:08:24,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 11:08:24,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:08:24,379 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 11:08:24,379 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-10-28 11:08:24,379 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 11:08:24,379 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 11:08:24,379 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 11:08:24,379 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 11:08:24,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 11:08:24,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-28 11:08:24,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 11:08:24,380 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 11:08:24,862 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 31 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-28 11:08:24,862 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [897077017] [2020-10-28 11:08:24,862 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 11:08:24,862 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 11:08:24,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867512122] [2020-10-28 11:08:24,864 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 11:08:24,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 11:08:24,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 11:08:24,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 11:08:24,865 INFO L87 Difference]: Start difference. First operand 20165 states and 31673 transitions. Second operand 7 states. [2020-10-28 11:08:25,163 WARN L193 SmtUtils]: Spent 260.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-28 11:08:27,028 WARN L193 SmtUtils]: Spent 265.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-28 11:08:48,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 11:08:48,852 INFO L93 Difference]: Finished difference Result 60012 states and 102243 transitions. [2020-10-28 11:08:48,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 11:08:48,853 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 985 [2020-10-28 11:08:48,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 11:08:49,034 INFO L225 Difference]: With dead ends: 60012 [2020-10-28 11:08:49,034 INFO L226 Difference]: Without dead ends: 39853 [2020-10-28 11:08:49,123 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-28 11:08:49,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39853 states. [2020-10-28 11:08:50,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39853 to 39177. [2020-10-28 11:08:50,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39177 states. [2020-10-28 11:08:50,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39177 states to 39177 states and 60499 transitions. [2020-10-28 11:08:50,752 INFO L78 Accepts]: Start accepts. Automaton has 39177 states and 60499 transitions. Word has length 985 [2020-10-28 11:08:50,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 11:08:50,752 INFO L481 AbstractCegarLoop]: Abstraction has 39177 states and 60499 transitions. [2020-10-28 11:08:50,753 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 11:08:50,753 INFO L276 IsEmpty]: Start isEmpty. Operand 39177 states and 60499 transitions. [2020-10-28 11:08:50,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 999 [2020-10-28 11:08:50,956 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 11:08:50,957 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 11:08:50,957 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 11:08:50,957 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 11:08:50,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 11:08:50,958 INFO L82 PathProgramCache]: Analyzing trace with hash 1001539705, now seen corresponding path program 1 times [2020-10-28 11:08:50,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 11:08:50,959 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [492007288] [2020-10-28 11:08:50,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 11:08:51,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 11:08:51,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:08:51,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:08:52,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:08:55,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:08:56,397 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 11:08:56,397 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1022 [2020-10-28 11:08:56,397 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 11:08:56,397 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5136 [2020-10-28 11:08:56,397 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 11:08:56,397 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 11:08:56,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 11:08:56,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-28 11:08:56,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-28 11:08:56,398 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 11:08:56,846 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 11:08:56,847 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 11:08:56,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 11:08:56,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:08:56,860 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 11:08:56,860 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 11:08:56,860 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 11:08:56,860 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 11:08:56,860 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 11:08:56,860 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 11:08:56,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 11:08:56,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 11:08:56,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 11:08:56,861 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 11:08:56,982 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-10-28 11:08:56,983 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 11:08:57,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 11:08:57,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:08:57,027 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 11:08:57,027 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-10-28 11:08:57,027 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 11:08:57,027 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-28 11:08:57,028 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 11:08:57,028 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 11:08:57,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 11:08:57,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 11:08:57,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-28 11:08:57,028 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 11:08:57,033 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-10-28 11:08:57,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 11:08:57,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:08:57,122 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 11:08:57,122 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-28 11:08:57,122 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 11:08:57,122 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 76 [2020-10-28 11:08:57,123 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 11:08:57,123 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 11:08:57,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 11:08:57,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 11:08:57,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-28 11:08:57,123 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 11:08:57,150 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-10-28 11:08:57,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 11:08:57,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:08:57,188 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 11:08:57,188 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-10-28 11:08:57,188 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 11:08:57,188 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 30 [2020-10-28 11:08:57,188 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 11:08:57,189 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 11:08:57,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 11:08:57,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 11:08:57,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-28 11:08:57,189 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 11:08:57,867 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 60 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-28 11:08:57,867 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [492007288] [2020-10-28 11:08:57,867 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 11:08:57,868 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 11:08:57,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064436876] [2020-10-28 11:08:57,869 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 11:08:57,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 11:08:57,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 11:08:57,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-28 11:08:57,870 INFO L87 Difference]: Start difference. First operand 39177 states and 60499 transitions. Second operand 8 states. [2020-10-28 11:08:58,274 WARN L193 SmtUtils]: Spent 266.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-28 11:08:59,133 WARN L193 SmtUtils]: Spent 259.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-10-28 11:09:36,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 11:09:36,674 INFO L93 Difference]: Finished difference Result 132013 states and 251018 transitions. [2020-10-28 11:09:36,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 11:09:36,675 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 998 [2020-10-28 11:09:36,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 11:09:37,329 INFO L225 Difference]: With dead ends: 132013 [2020-10-28 11:09:37,329 INFO L226 Difference]: Without dead ends: 97992 [2020-10-28 11:09:37,454 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2020-10-28 11:09:37,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97992 states. [2020-10-28 11:09:41,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97992 to 97396. [2020-10-28 11:09:41,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97396 states. [2020-10-28 11:09:42,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97396 states to 97396 states and 166874 transitions. [2020-10-28 11:09:42,399 INFO L78 Accepts]: Start accepts. Automaton has 97396 states and 166874 transitions. Word has length 998 [2020-10-28 11:09:42,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 11:09:42,411 INFO L481 AbstractCegarLoop]: Abstraction has 97396 states and 166874 transitions. [2020-10-28 11:09:42,411 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 11:09:42,412 INFO L276 IsEmpty]: Start isEmpty. Operand 97396 states and 166874 transitions. [2020-10-28 11:09:43,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1004 [2020-10-28 11:09:43,326 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 11:09:43,327 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 11:09:43,327 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 11:09:43,327 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 11:09:43,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 11:09:43,328 INFO L82 PathProgramCache]: Analyzing trace with hash 474846641, now seen corresponding path program 1 times [2020-10-28 11:09:43,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 11:09:43,330 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [812397782] [2020-10-28 11:09:43,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 11:09:43,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 11:09:43,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking...