/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=SHALLOWEST --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/Problem12_label02.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-26 22:46:47,564 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-26 22:46:47,568 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-26 22:46:47,626 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-26 22:46:47,627 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-26 22:46:47,634 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-26 22:46:47,637 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-26 22:46:47,643 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-26 22:46:47,648 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-26 22:46:47,654 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-26 22:46:47,656 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-26 22:46:47,657 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-26 22:46:47,658 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-26 22:46:47,661 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-26 22:46:47,664 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-26 22:46:47,666 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-26 22:46:47,668 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-26 22:46:47,671 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-26 22:46:47,684 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-26 22:46:47,687 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-26 22:46:47,688 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-26 22:46:47,690 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-26 22:46:47,691 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-26 22:46:47,692 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-26 22:46:47,695 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-26 22:46:47,695 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-26 22:46:47,696 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-26 22:46:47,697 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-26 22:46:47,697 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-26 22:46:47,699 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-26 22:46:47,699 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-26 22:46:47,700 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-26 22:46:47,701 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-26 22:46:47,702 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-26 22:46:47,703 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-26 22:46:47,703 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-26 22:46:47,704 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-26 22:46:47,704 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-26 22:46:47,704 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-26 22:46:47,705 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-26 22:46:47,706 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-26 22:46:47,707 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 [2020-10-26 22:46:47,733 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-26 22:46:47,733 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-26 22:46:47,735 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-26 22:46:47,735 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-26 22:46:47,735 INFO L138 SettingsManager]: * Use SBE=true [2020-10-26 22:46:47,735 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-26 22:46:47,736 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-26 22:46:47,736 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-26 22:46:47,736 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-26 22:46:47,736 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-26 22:46:47,736 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-26 22:46:47,737 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-26 22:46:47,737 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-26 22:46:47,737 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-26 22:46:47,737 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-26 22:46:47,737 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-26 22:46:47,738 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-26 22:46:47,738 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-26 22:46:47,738 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-26 22:46:47,738 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-26 22:46:47,738 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-26 22:46:47,739 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 22:46:47,739 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-26 22:46:47,739 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-26 22:46:47,739 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-26 22:46:47,739 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-26 22:46:47,740 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-26 22:46:47,740 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-26 22:46:47,740 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-26 22:46:47,740 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-26 22:46:48,192 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-26 22:46:48,248 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-26 22:46:48,252 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-26 22:46:48,253 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-26 22:46:48,254 INFO L275 PluginConnector]: CDTParser initialized [2020-10-26 22:46:48,255 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem12_label02.c [2020-10-26 22:46:48,347 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f945bd330/d012f399ada34089bfc3b73870682d3e/FLAG22744740c [2020-10-26 22:46:49,365 INFO L306 CDTParser]: Found 1 translation units. [2020-10-26 22:46:49,366 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem12_label02.c [2020-10-26 22:46:49,405 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f945bd330/d012f399ada34089bfc3b73870682d3e/FLAG22744740c [2020-10-26 22:46:49,830 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f945bd330/d012f399ada34089bfc3b73870682d3e [2020-10-26 22:46:49,833 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-26 22:46:49,840 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-26 22:46:49,842 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-26 22:46:49,842 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-26 22:46:49,846 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-26 22:46:49,847 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 10:46:49" (1/1) ... [2020-10-26 22:46:49,850 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4024b2fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:46:49, skipping insertion in model container [2020-10-26 22:46:49,851 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 10:46:49" (1/1) ... [2020-10-26 22:46:49,859 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-26 22:46:49,977 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-26 22:46:51,352 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 22:46:51,372 INFO L203 MainTranslator]: Completed pre-run [2020-10-26 22:46:52,048 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 22:46:52,087 INFO L208 MainTranslator]: Completed translation [2020-10-26 22:46:52,087 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:46:52 WrapperNode [2020-10-26 22:46:52,087 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-26 22:46:52,089 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-26 22:46:52,089 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-26 22:46:52,090 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-26 22:46:52,105 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:46:52" (1/1) ... [2020-10-26 22:46:52,107 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:46:52" (1/1) ... [2020-10-26 22:46:52,171 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:46:52" (1/1) ... [2020-10-26 22:46:52,171 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:46:52" (1/1) ... [2020-10-26 22:46:52,319 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:46:52" (1/1) ... [2020-10-26 22:46:52,361 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:46:52" (1/1) ... [2020-10-26 22:46:52,468 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:46:52" (1/1) ... [2020-10-26 22:46:52,509 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-26 22:46:52,511 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-26 22:46:52,511 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-26 22:46:52,511 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-26 22:46:52,512 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:46:52" (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 [2020-10-26 22:46:52,603 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-26 22:46:52,603 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-26 22:46:52,603 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-26 22:46:52,603 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-26 22:46:52,603 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-26 22:46:52,603 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-26 22:46:52,604 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-26 22:46:52,604 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-26 22:46:52,604 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-26 22:46:52,604 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-26 22:46:52,604 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-26 22:46:52,604 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-26 22:46:52,605 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-26 22:46:52,605 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-26 22:46:52,605 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-26 22:46:52,605 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-26 22:46:52,605 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-26 22:46:52,605 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-26 22:46:52,606 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-26 22:46:52,606 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-26 22:46:52,606 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-26 22:46:52,606 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-26 22:46:52,606 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-26 22:46:52,606 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-26 22:46:52,607 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-26 22:46:58,116 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-26 22:46:58,117 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-26 22:46:58,120 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 10:46:58 BoogieIcfgContainer [2020-10-26 22:46:58,121 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-26 22:46:58,123 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-26 22:46:58,123 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-26 22:46:58,127 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-26 22:46:58,129 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 10:46:49" (1/3) ... [2020-10-26 22:46:58,130 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fce5fea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 10:46:58, skipping insertion in model container [2020-10-26 22:46:58,130 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:46:52" (2/3) ... [2020-10-26 22:46:58,131 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fce5fea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 10:46:58, skipping insertion in model container [2020-10-26 22:46:58,131 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 10:46:58" (3/3) ... [2020-10-26 22:46:58,133 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem12_label02.c [2020-10-26 22:46:58,147 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-26 22:46:58,153 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-26 22:46:58,169 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-26 22:46:58,206 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-26 22:46:58,207 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-26 22:46:58,207 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-26 22:46:58,207 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-26 22:46:58,207 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-26 22:46:58,207 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-26 22:46:58,208 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-26 22:46:58,208 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-26 22:46:58,248 INFO L276 IsEmpty]: Start isEmpty. Operand 843 states. [2020-10-26 22:46:58,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-26 22:46:58,263 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:46:58,264 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] [2020-10-26 22:46:58,265 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:46:58,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:46:58,272 INFO L82 PathProgramCache]: Analyzing trace with hash 1563638020, now seen corresponding path program 1 times [2020-10-26 22:46:58,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:46:58,284 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1393143778] [2020-10-26 22:46:58,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:46:58,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:46:58,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:46:59,217 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:46:59,218 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-26 22:46:59,218 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:46:59,218 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 620 [2020-10-26 22:46:59,220 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:46:59,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 22:46:59,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 22:46:59,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-26 22:46:59,221 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-26 22:46:59,424 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:46:59,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:46:59,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:46:59,490 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:46:59,490 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:46:59,490 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:46:59,491 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 41 [2020-10-26 22:46:59,491 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:46:59,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:46:59,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:46:59,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 22:46:59,492 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 22:46:59,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 22:46:59,554 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1393143778] [2020-10-26 22:46:59,556 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 22:46:59,556 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-26 22:46:59,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277213260] [2020-10-26 22:46:59,562 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-26 22:46:59,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:46:59,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-26 22:46:59,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-26 22:46:59,582 INFO L87 Difference]: Start difference. First operand 843 states. Second operand 5 states. [2020-10-26 22:47:16,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:47:16,209 INFO L93 Difference]: Finished difference Result 3258 states and 6300 transitions. [2020-10-26 22:47:16,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-26 22:47:16,211 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 69 [2020-10-26 22:47:16,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:47:16,249 INFO L225 Difference]: With dead ends: 3258 [2020-10-26 22:47:16,250 INFO L226 Difference]: Without dead ends: 2347 [2020-10-26 22:47:16,263 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-26 22:47:16,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2347 states. [2020-10-26 22:47:16,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2347 to 2332. [2020-10-26 22:47:16,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2332 states. [2020-10-26 22:47:16,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2332 states to 2332 states and 3788 transitions. [2020-10-26 22:47:16,451 INFO L78 Accepts]: Start accepts. Automaton has 2332 states and 3788 transitions. Word has length 69 [2020-10-26 22:47:16,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:47:16,451 INFO L481 AbstractCegarLoop]: Abstraction has 2332 states and 3788 transitions. [2020-10-26 22:47:16,452 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-26 22:47:16,452 INFO L276 IsEmpty]: Start isEmpty. Operand 2332 states and 3788 transitions. [2020-10-26 22:47:16,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2020-10-26 22:47:16,459 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:47:16,459 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-26 22:47:16,460 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-26 22:47:16,460 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:47:16,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:47:16,461 INFO L82 PathProgramCache]: Analyzing trace with hash -2055415739, now seen corresponding path program 1 times [2020-10-26 22:47:16,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:47:16,462 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1590693261] [2020-10-26 22:47:16,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:47:16,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:47:16,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:47:16,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:47:16,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:47:17,977 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:47:17,978 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 156 [2020-10-26 22:47:17,978 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 22:47:17,979 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1466 [2020-10-26 22:47:17,980 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:47:17,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 22:47:17,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 22:47:17,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 147 [2020-10-26 22:47:17,983 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-26 22:47:18,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:47:18,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:47:18,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:47:18,225 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:47:18,226 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:47:18,226 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:47:18,226 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 39 [2020-10-26 22:47:18,227 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:47:18,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:47:18,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:47:18,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 22:47:18,228 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 22:47:18,256 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:47:18,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:47:18,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:47:18,411 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:47:18,412 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-26 22:47:18,412 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:47:18,412 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 131 [2020-10-26 22:47:18,413 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:47:18,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:47:18,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:47:18,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-26 22:47:18,414 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 22:47:18,553 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-26 22:47:18,553 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1590693261] [2020-10-26 22:47:18,553 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:47:18,554 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-26 22:47:18,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656679235] [2020-10-26 22:47:18,556 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-26 22:47:18,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:47:18,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-26 22:47:18,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-26 22:47:18,561 INFO L87 Difference]: Start difference. First operand 2332 states and 3788 transitions. Second operand 6 states. [2020-10-26 22:47:31,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:47:31,964 INFO L93 Difference]: Finished difference Result 7034 states and 11521 transitions. [2020-10-26 22:47:31,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-26 22:47:31,966 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 144 [2020-10-26 22:47:31,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:47:32,006 INFO L225 Difference]: With dead ends: 7034 [2020-10-26 22:47:32,007 INFO L226 Difference]: Without dead ends: 4708 [2020-10-26 22:47:32,015 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-26 22:47:32,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4708 states. [2020-10-26 22:47:32,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4708 to 4690. [2020-10-26 22:47:32,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4690 states. [2020-10-26 22:47:32,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4690 states to 4690 states and 6705 transitions. [2020-10-26 22:47:32,179 INFO L78 Accepts]: Start accepts. Automaton has 4690 states and 6705 transitions. Word has length 144 [2020-10-26 22:47:32,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:47:32,180 INFO L481 AbstractCegarLoop]: Abstraction has 4690 states and 6705 transitions. [2020-10-26 22:47:32,180 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-26 22:47:32,180 INFO L276 IsEmpty]: Start isEmpty. Operand 4690 states and 6705 transitions. [2020-10-26 22:47:32,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-10-26 22:47:32,183 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:47:32,183 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-26 22:47:32,184 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-26 22:47:32,184 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:47:32,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:47:32,184 INFO L82 PathProgramCache]: Analyzing trace with hash 1705722957, now seen corresponding path program 1 times [2020-10-26 22:47:32,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:47:32,185 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [273603285] [2020-10-26 22:47:32,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:47:32,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:47:32,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:47:32,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:47:33,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:47:33,572 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:47:33,572 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 160 [2020-10-26 22:47:33,573 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 22:47:33,573 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1342 [2020-10-26 22:47:33,573 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:47:33,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 22:47:33,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 22:47:33,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 85 [2020-10-26 22:47:33,574 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:47:33,719 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:47:33,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:47:33,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:47:33,747 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:47:33,747 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:47:33,747 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:47:33,748 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-26 22:47:33,748 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:47:33,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:47:33,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:47:33,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 22:47:33,749 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:47:33,776 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:47:33,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:47:33,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:47:33,993 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:47:33,994 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-26 22:47:33,994 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:47:33,994 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 186 [2020-10-26 22:47:33,994 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:47:33,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:47:33,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:47:33,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-26 22:47:33,995 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:47:34,088 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 22:47:34,090 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [273603285] [2020-10-26 22:47:34,091 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 22:47:34,091 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-26 22:47:34,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913655713] [2020-10-26 22:47:34,093 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 22:47:34,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:47:34,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 22:47:34,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 22:47:34,095 INFO L87 Difference]: Start difference. First operand 4690 states and 6705 transitions. Second operand 7 states. [2020-10-26 22:47:51,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:47:51,188 INFO L93 Difference]: Finished difference Result 14324 states and 20938 transitions. [2020-10-26 22:47:51,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 22:47:51,189 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 148 [2020-10-26 22:47:51,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:47:51,248 INFO L225 Difference]: With dead ends: 14324 [2020-10-26 22:47:51,248 INFO L226 Difference]: Without dead ends: 9640 [2020-10-26 22:47:51,262 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-10-26 22:47:51,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9640 states. [2020-10-26 22:47:51,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9640 to 9511. [2020-10-26 22:47:51,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9511 states. [2020-10-26 22:47:51,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9511 states to 9511 states and 12921 transitions. [2020-10-26 22:47:51,598 INFO L78 Accepts]: Start accepts. Automaton has 9511 states and 12921 transitions. Word has length 148 [2020-10-26 22:47:51,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:47:51,600 INFO L481 AbstractCegarLoop]: Abstraction has 9511 states and 12921 transitions. [2020-10-26 22:47:51,600 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 22:47:51,600 INFO L276 IsEmpty]: Start isEmpty. Operand 9511 states and 12921 transitions. [2020-10-26 22:47:51,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2020-10-26 22:47:51,609 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:47:51,614 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-26 22:47:51,615 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-26 22:47:51,615 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:47:51,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:47:51,615 INFO L82 PathProgramCache]: Analyzing trace with hash -2049158511, now seen corresponding path program 1 times [2020-10-26 22:47:51,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:47:51,616 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1174697902] [2020-10-26 22:47:51,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:47:51,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:47:51,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:47:52,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:47:53,100 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:47:53,107 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 194 [2020-10-26 22:47:53,107 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 22:47:53,108 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1424 [2020-10-26 22:47:53,108 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:47:53,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 22:47:53,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 22:47:53,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 119 [2020-10-26 22:47:53,108 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:47:53,239 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:47:53,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:47:53,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:47:53,262 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:47:53,263 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:47:53,263 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:47:53,263 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-26 22:47:53,263 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:47:53,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:47:53,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:47:53,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 22:47:53,264 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:47:53,291 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:47:53,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:47:53,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:47:53,518 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:47:53,518 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-10-26 22:47:53,518 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:47:53,518 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 198 [2020-10-26 22:47:53,519 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:47:53,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:47:53,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:47:53,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 114 [2020-10-26 22:47:53,521 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-26 22:47:53,654 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 22:47:53,655 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1174697902] [2020-10-26 22:47:53,655 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 22:47:53,655 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-26 22:47:53,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102392175] [2020-10-26 22:47:53,657 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 22:47:53,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:47:53,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 22:47:53,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 22:47:53,668 INFO L87 Difference]: Start difference. First operand 9511 states and 12921 transitions. Second operand 7 states. [2020-10-26 22:48:09,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:48:09,477 INFO L93 Difference]: Finished difference Result 21082 states and 30453 transitions. [2020-10-26 22:48:09,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 22:48:09,478 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 182 [2020-10-26 22:48:09,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:48:09,532 INFO L225 Difference]: With dead ends: 21082 [2020-10-26 22:48:09,532 INFO L226 Difference]: Without dead ends: 11577 [2020-10-26 22:48:09,558 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-26 22:48:09,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11577 states. [2020-10-26 22:48:09,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11577 to 9702. [2020-10-26 22:48:09,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9702 states. [2020-10-26 22:48:10,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9702 states to 9702 states and 13103 transitions. [2020-10-26 22:48:10,004 INFO L78 Accepts]: Start accepts. Automaton has 9702 states and 13103 transitions. Word has length 182 [2020-10-26 22:48:10,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:48:10,005 INFO L481 AbstractCegarLoop]: Abstraction has 9702 states and 13103 transitions. [2020-10-26 22:48:10,005 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 22:48:10,005 INFO L276 IsEmpty]: Start isEmpty. Operand 9702 states and 13103 transitions. [2020-10-26 22:48:10,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2020-10-26 22:48:10,008 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:48:10,008 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-26 22:48:10,009 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-26 22:48:10,009 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:48:10,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:48:10,009 INFO L82 PathProgramCache]: Analyzing trace with hash 1002509261, now seen corresponding path program 1 times [2020-10-26 22:48:10,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:48:10,010 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [866077595] [2020-10-26 22:48:10,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:48:10,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:48:10,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:48:10,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:48:12,146 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:48:12,146 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 229 [2020-10-26 22:48:12,147 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 22:48:12,147 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2080 [2020-10-26 22:48:12,147 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:48:12,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 22:48:12,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 22:48:12,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 154 [2020-10-26 22:48:12,148 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:48:12,292 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:48:12,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:48:12,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:48:12,315 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:48:12,315 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:48:12,315 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:48:12,315 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-26 22:48:12,316 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:48:12,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:48:12,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:48:12,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 22:48:12,316 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:48:12,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:48:12,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:48:12,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:48:12,662 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:48:12,662 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 149 [2020-10-26 22:48:12,662 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:48:12,662 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 258 [2020-10-26 22:48:12,662 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:48:12,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:48:12,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:48:12,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 149 [2020-10-26 22:48:12,663 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:48:13,269 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 22:48:13,270 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [866077595] [2020-10-26 22:48:13,270 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 22:48:13,270 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-26 22:48:13,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879501844] [2020-10-26 22:48:13,271 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 22:48:13,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:48:13,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 22:48:13,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-26 22:48:13,272 INFO L87 Difference]: Start difference. First operand 9702 states and 13103 transitions. Second operand 8 states. [2020-10-26 22:48:35,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:48:35,244 INFO L93 Difference]: Finished difference Result 26277 states and 35928 transitions. [2020-10-26 22:48:35,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-26 22:48:35,246 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 217 [2020-10-26 22:48:35,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:48:35,307 INFO L225 Difference]: With dead ends: 26277 [2020-10-26 22:48:35,308 INFO L226 Difference]: Without dead ends: 17348 [2020-10-26 22:48:35,330 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2020-10-26 22:48:35,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17348 states. [2020-10-26 22:48:35,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17348 to 16368. [2020-10-26 22:48:35,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16368 states. [2020-10-26 22:48:35,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16368 states to 16368 states and 20903 transitions. [2020-10-26 22:48:35,769 INFO L78 Accepts]: Start accepts. Automaton has 16368 states and 20903 transitions. Word has length 217 [2020-10-26 22:48:35,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:48:35,770 INFO L481 AbstractCegarLoop]: Abstraction has 16368 states and 20903 transitions. [2020-10-26 22:48:35,770 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 22:48:35,770 INFO L276 IsEmpty]: Start isEmpty. Operand 16368 states and 20903 transitions. [2020-10-26 22:48:35,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 290 [2020-10-26 22:48:35,778 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:48:35,779 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-10-26 22:48:35,780 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-26 22:48:35,780 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:48:35,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:48:35,781 INFO L82 PathProgramCache]: Analyzing trace with hash 1086329944, now seen corresponding path program 1 times [2020-10-26 22:48:35,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:48:35,781 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1129000913] [2020-10-26 22:48:35,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:48:35,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:48:35,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:48:36,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:48:36,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:48:38,055 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:48:38,055 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 303 [2020-10-26 22:48:38,056 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 22:48:38,056 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2168 [2020-10-26 22:48:38,056 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:48:38,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:48:38,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 155 [2020-10-26 22:48:38,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-26 22:48:38,056 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:48:38,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:48:38,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:48:38,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:48:38,215 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:48:38,216 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:48:38,216 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:48:38,216 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-26 22:48:38,216 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:48:38,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:48:38,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:48:38,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:48:38,217 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:48:38,247 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:48:38,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:48:38,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:48:38,430 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:48:38,431 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 146 [2020-10-26 22:48:38,431 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:48:38,431 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 146 [2020-10-26 22:48:38,431 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:48:38,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:48:38,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:48:38,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 140 [2020-10-26 22:48:38,432 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:48:38,497 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2020-10-26 22:48:38,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:48:38,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:48:38,619 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:48:38,619 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-26 22:48:38,619 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:48:38,619 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 101 [2020-10-26 22:48:38,620 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:48:38,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:48:38,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:48:38,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-26 22:48:38,620 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:48:38,835 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 194 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 22:48:38,836 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1129000913] [2020-10-26 22:48:38,837 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:48:38,837 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 22:48:38,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574636714] [2020-10-26 22:48:38,838 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 22:48:38,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:48:38,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 22:48:38,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 22:48:38,839 INFO L87 Difference]: Start difference. First operand 16368 states and 20903 transitions. Second operand 7 states. [2020-10-26 22:49:02,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:49:02,441 INFO L93 Difference]: Finished difference Result 40291 states and 54911 transitions. [2020-10-26 22:49:02,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 22:49:02,445 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 289 [2020-10-26 22:49:02,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:49:02,543 INFO L225 Difference]: With dead ends: 40291 [2020-10-26 22:49:02,544 INFO L226 Difference]: Without dead ends: 25465 [2020-10-26 22:49:02,583 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-26 22:49:02,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25465 states. [2020-10-26 22:49:03,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25465 to 25308. [2020-10-26 22:49:03,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25308 states. [2020-10-26 22:49:03,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25308 states to 25308 states and 34194 transitions. [2020-10-26 22:49:03,395 INFO L78 Accepts]: Start accepts. Automaton has 25308 states and 34194 transitions. Word has length 289 [2020-10-26 22:49:03,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:49:03,396 INFO L481 AbstractCegarLoop]: Abstraction has 25308 states and 34194 transitions. [2020-10-26 22:49:03,396 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 22:49:03,396 INFO L276 IsEmpty]: Start isEmpty. Operand 25308 states and 34194 transitions. [2020-10-26 22:49:03,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 293 [2020-10-26 22:49:03,402 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:49:03,403 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-10-26 22:49:03,403 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-26 22:49:03,403 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:49:03,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:49:03,404 INFO L82 PathProgramCache]: Analyzing trace with hash 814643342, now seen corresponding path program 1 times [2020-10-26 22:49:03,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:49:03,404 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [16985342] [2020-10-26 22:49:03,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:49:03,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:49:03,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:49:03,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:49:04,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:49:04,857 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:49:04,858 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 306 [2020-10-26 22:49:04,858 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 22:49:04,858 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1387 [2020-10-26 22:49:04,858 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:49:04,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:49:04,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 85 [2020-10-26 22:49:04,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-26 22:49:04,859 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:49:05,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:49:05,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:49:05,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:49:05,060 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:49:05,060 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:49:05,061 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:49:05,061 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-26 22:49:05,061 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:49:05,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:49:05,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:49:05,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:49:05,062 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:49:05,093 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:49:05,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:49:05,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:49:05,165 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:49:05,165 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-26 22:49:05,165 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:49:05,165 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 58 [2020-10-26 22:49:05,166 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:49:05,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:49:05,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:49:05,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-26 22:49:05,166 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:49:05,192 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-10-26 22:49:05,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:49:05,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:49:05,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:49:05,767 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:49:05,768 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 149 [2020-10-26 22:49:05,768 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 22:49:05,768 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 529 [2020-10-26 22:49:05,768 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:49:05,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:49:05,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:49:05,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 149 [2020-10-26 22:49:05,769 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:49:06,862 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 194 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 22:49:06,863 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [16985342] [2020-10-26 22:49:06,863 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:49:06,863 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-26 22:49:06,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900557614] [2020-10-26 22:49:06,864 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-26 22:49:06,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:49:06,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-26 22:49:06,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-26 22:49:06,865 INFO L87 Difference]: Start difference. First operand 25308 states and 34194 transitions. Second operand 6 states. [2020-10-26 22:49:07,245 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2020-10-26 22:49:07,711 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2020-10-26 22:49:23,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:49:23,078 INFO L93 Difference]: Finished difference Result 49331 states and 67403 transitions. [2020-10-26 22:49:23,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-26 22:49:23,081 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 292 [2020-10-26 22:49:23,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:49:23,162 INFO L225 Difference]: With dead ends: 49331 [2020-10-26 22:49:23,162 INFO L226 Difference]: Without dead ends: 24473 [2020-10-26 22:49:23,210 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-10-26 22:49:23,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24473 states. [2020-10-26 22:49:23,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24473 to 23635. [2020-10-26 22:49:23,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23635 states. [2020-10-26 22:49:23,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23635 states to 23635 states and 31188 transitions. [2020-10-26 22:49:23,844 INFO L78 Accepts]: Start accepts. Automaton has 23635 states and 31188 transitions. Word has length 292 [2020-10-26 22:49:23,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:49:23,844 INFO L481 AbstractCegarLoop]: Abstraction has 23635 states and 31188 transitions. [2020-10-26 22:49:23,844 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-26 22:49:23,844 INFO L276 IsEmpty]: Start isEmpty. Operand 23635 states and 31188 transitions. [2020-10-26 22:49:23,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 304 [2020-10-26 22:49:23,850 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:49:23,850 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-26 22:49:23,851 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-26 22:49:23,851 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:49:23,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:49:23,852 INFO L82 PathProgramCache]: Analyzing trace with hash 1279519028, now seen corresponding path program 1 times [2020-10-26 22:49:23,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:49:23,853 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [982277983] [2020-10-26 22:49:23,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:49:23,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:49:23,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:49:24,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:49:25,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:49:25,556 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:49:25,557 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 317 [2020-10-26 22:49:25,557 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 22:49:25,557 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1638 [2020-10-26 22:49:25,557 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:49:25,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 22:49:25,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 155 [2020-10-26 22:49:25,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 158 [2020-10-26 22:49:25,558 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:49:25,767 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-26 22:49:25,769 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:49:25,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:49:25,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:49:25,778 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:49:25,778 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:49:25,778 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:49:25,778 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 22:49:25,779 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:49:25,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:49:25,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:49:25,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:49:25,779 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:49:25,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:49:25,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:49:25,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:49:25,992 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:49:25,994 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 146 [2020-10-26 22:49:25,994 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:49:25,995 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 138 [2020-10-26 22:49:25,995 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:49:25,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:49:25,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:49:25,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 140 [2020-10-26 22:49:25,996 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:49:26,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2020-10-26 22:49:26,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:49:26,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:49:26,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:49:26,213 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:49:26,214 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-26 22:49:26,214 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 22:49:26,214 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 135 [2020-10-26 22:49:26,214 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:49:26,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:49:26,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:49:26,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 90 [2020-10-26 22:49:26,215 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:49:26,404 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 145 proven. 61 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-26 22:49:26,405 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [982277983] [2020-10-26 22:49:26,405 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:49:26,405 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-26 22:49:26,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892383275] [2020-10-26 22:49:26,406 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 22:49:26,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:49:26,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 22:49:26,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-26 22:49:26,408 INFO L87 Difference]: Start difference. First operand 23635 states and 31188 transitions. Second operand 8 states. [2020-10-26 22:49:26,572 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2020-10-26 22:49:30,641 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-26 22:49:57,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:49:57,939 INFO L93 Difference]: Finished difference Result 91064 states and 128859 transitions. [2020-10-26 22:49:57,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-26 22:49:57,941 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 303 [2020-10-26 22:49:57,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:49:58,218 INFO L225 Difference]: With dead ends: 91064 [2020-10-26 22:49:58,218 INFO L226 Difference]: Without dead ends: 67435 [2020-10-26 22:49:58,275 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2020-10-26 22:49:58,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67435 states. [2020-10-26 22:50:00,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67435 to 64291. [2020-10-26 22:50:00,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64291 states. [2020-10-26 22:50:01,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64291 states to 64291 states and 90034 transitions. [2020-10-26 22:50:01,144 INFO L78 Accepts]: Start accepts. Automaton has 64291 states and 90034 transitions. Word has length 303 [2020-10-26 22:50:01,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:50:01,144 INFO L481 AbstractCegarLoop]: Abstraction has 64291 states and 90034 transitions. [2020-10-26 22:50:01,145 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 22:50:01,145 INFO L276 IsEmpty]: Start isEmpty. Operand 64291 states and 90034 transitions. [2020-10-26 22:50:01,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 308 [2020-10-26 22:50:01,152 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:50:01,153 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-26 22:50:01,153 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-26 22:50:01,153 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:50:01,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:50:01,154 INFO L82 PathProgramCache]: Analyzing trace with hash 1650980396, now seen corresponding path program 1 times [2020-10-26 22:50:01,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:50:01,159 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1136237782] [2020-10-26 22:50:01,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:50:01,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:50:01,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:50:01,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:50:03,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:50:04,337 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:50:04,340 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 321 [2020-10-26 22:50:04,340 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 22:50:04,341 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3072 [2020-10-26 22:50:04,341 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:50:04,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 22:50:04,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 159 [2020-10-26 22:50:04,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 158 [2020-10-26 22:50:04,341 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:50:04,576 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-26 22:50:04,578 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:50:04,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:50:04,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:50:04,588 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:50:04,589 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:50:04,589 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:50:04,589 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 22:50:04,589 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:50:04,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:50:04,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:50:04,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:50:04,590 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:50:04,636 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:50:04,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:50:04,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:50:04,845 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:50:04,846 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 150 [2020-10-26 22:50:04,847 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:50:04,847 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 171 [2020-10-26 22:50:04,847 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:50:04,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:50:04,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:50:04,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 144 [2020-10-26 22:50:04,848 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:50:04,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2020-10-26 22:50:04,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:50:04,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:50:04,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:50:05,101 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:50:05,101 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-26 22:50:05,101 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 22:50:05,102 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 167 [2020-10-26 22:50:05,102 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:50:05,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:50:05,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:50:05,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 90 [2020-10-26 22:50:05,102 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:50:05,311 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 145 proven. 61 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-26 22:50:05,312 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1136237782] [2020-10-26 22:50:05,312 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:50:05,312 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 22:50:05,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933925804] [2020-10-26 22:50:05,313 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 22:50:05,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:50:05,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 22:50:05,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 22:50:05,315 INFO L87 Difference]: Start difference. First operand 64291 states and 90034 transitions. Second operand 7 states. [2020-10-26 22:50:06,754 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-26 22:50:11,920 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-26 22:50:32,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:50:32,801 INFO L93 Difference]: Finished difference Result 153440 states and 221320 transitions. [2020-10-26 22:50:32,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 22:50:32,804 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 307 [2020-10-26 22:50:32,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:50:33,344 INFO L225 Difference]: With dead ends: 153440 [2020-10-26 22:50:33,345 INFO L226 Difference]: Without dead ends: 89155 [2020-10-26 22:50:33,577 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-26 22:50:33,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89155 states.