/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --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 SingleStatement --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=LOWLEXORDER --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem10_label52.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 21:46:08,486 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 21:46:08,490 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 21:46:08,517 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 21:46:08,518 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 21:46:08,519 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 21:46:08,521 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 21:46:08,523 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 21:46:08,524 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 21:46:08,525 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 21:46:08,527 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 21:46:08,528 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 21:46:08,528 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 21:46:08,529 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 21:46:08,531 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 21:46:08,532 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 21:46:08,533 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 21:46:08,534 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 21:46:08,536 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 21:46:08,538 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 21:46:08,539 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 21:46:08,541 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 21:46:08,546 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 21:46:08,548 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 21:46:08,551 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 21:46:08,551 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 21:46:08,555 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 21:46:08,556 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 21:46:08,559 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 21:46:08,560 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 21:46:08,560 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 21:46:08,561 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 21:46:08,563 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 21:46:08,564 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 21:46:08,567 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 21:46:08,567 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 21:46:08,568 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 21:46:08,568 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 21:46:08,568 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 21:46:08,570 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 21:46:08,572 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 21:46:08,573 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 [2020-09-24 21:46:08,634 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 21:46:08,637 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 21:46:08,638 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 21:46:08,639 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 21:46:08,639 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 21:46:08,639 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 21:46:08,639 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 21:46:08,639 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 21:46:08,640 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 21:46:08,640 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 21:46:08,640 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 21:46:08,640 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 21:46:08,640 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 21:46:08,641 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 21:46:08,641 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 21:46:08,641 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 21:46:08,641 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 21:46:08,641 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 21:46:08,642 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 21:46:08,642 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 21:46:08,642 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 21:46:08,642 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 21:46:08,642 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 21:46:08,643 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 21:46:08,643 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 21:46:08,643 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 21:46:08,643 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 21:46:08,643 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 21:46:08,644 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 21:46:08,644 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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 -> SingleStatement 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=LOWLEXORDER;log-additional-information=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=LOWLEXORDER;log-additional-information=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=LOWLEXORDER;log-additional-information=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=LOWLEXORDER;log-additional-information=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=LOWLEXORDER;log-additional-information=true; [2020-09-24 21:46:09,105 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 21:46:09,125 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 21:46:09,130 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 21:46:09,133 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 21:46:09,133 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 21:46:09,135 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem10_label52.c [2020-09-24 21:46:09,224 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/04848dc17/dc10538ffb4c4ae596b434fb6d4d2f9d/FLAGa27e2fc6d [2020-09-24 21:46:09,850 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 21:46:09,853 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem10_label52.c [2020-09-24 21:46:09,871 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/04848dc17/dc10538ffb4c4ae596b434fb6d4d2f9d/FLAGa27e2fc6d [2020-09-24 21:46:10,094 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/04848dc17/dc10538ffb4c4ae596b434fb6d4d2f9d [2020-09-24 21:46:10,111 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 21:46:10,117 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 21:46:10,119 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 21:46:10,119 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 21:46:10,124 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 21:46:10,125 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 09:46:10" (1/1) ... [2020-09-24 21:46:10,130 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f58caab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:46:10, skipping insertion in model container [2020-09-24 21:46:10,130 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 09:46:10" (1/1) ... [2020-09-24 21:46:10,141 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 21:46:10,194 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 21:46:10,721 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 21:46:10,728 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 21:46:10,948 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 21:46:10,968 INFO L208 MainTranslator]: Completed translation [2020-09-24 21:46:10,968 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:46:10 WrapperNode [2020-09-24 21:46:10,968 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 21:46:10,969 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 21:46:10,970 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 21:46:10,970 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 21:46:10,988 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:46:10" (1/1) ... [2020-09-24 21:46:10,989 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:46:10" (1/1) ... [2020-09-24 21:46:11,009 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:46:10" (1/1) ... [2020-09-24 21:46:11,009 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:46:10" (1/1) ... [2020-09-24 21:46:11,048 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:46:10" (1/1) ... [2020-09-24 21:46:11,068 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:46:10" (1/1) ... [2020-09-24 21:46:11,075 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:46:10" (1/1) ... [2020-09-24 21:46:11,085 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 21:46:11,085 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 21:46:11,085 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 21:46:11,086 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 21:46:11,087 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:46:10" (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 [2020-09-24 21:46:11,181 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 21:46:11,181 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 21:46:11,181 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-09-24 21:46:11,181 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 21:46:11,181 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-09-24 21:46:11,182 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 21:46:11,182 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-24 21:46:11,182 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-09-24 21:46:11,182 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 21:46:11,182 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 21:46:11,183 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 21:46:12,703 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 21:46:12,704 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-24 21:46:12,712 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 09:46:12 BoogieIcfgContainer [2020-09-24 21:46:12,713 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 21:46:12,714 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 21:46:12,714 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 21:46:12,719 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 21:46:12,720 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 09:46:10" (1/3) ... [2020-09-24 21:46:12,721 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@218dff6b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 09:46:12, skipping insertion in model container [2020-09-24 21:46:12,721 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:46:10" (2/3) ... [2020-09-24 21:46:12,721 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@218dff6b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 09:46:12, skipping insertion in model container [2020-09-24 21:46:12,722 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 09:46:12" (3/3) ... [2020-09-24 21:46:12,724 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem10_label52.c [2020-09-24 21:46:12,738 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 21:46:12,751 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 21:46:12,775 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 21:46:12,810 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 21:46:12,810 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 21:46:12,811 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 21:46:12,811 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 21:46:12,811 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 21:46:12,811 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 21:46:12,811 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 21:46:12,811 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 21:46:12,842 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states. [2020-09-24 21:46:12,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-09-24 21:46:12,854 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:46:12,855 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] [2020-09-24 21:46:12,856 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:46:12,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:46:12,864 INFO L82 PathProgramCache]: Analyzing trace with hash 963589103, now seen corresponding path program 1 times [2020-09-24 21:46:12,875 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:46:12,876 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [302305946] [2020-09-24 21:46:12,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:46:13,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:46:13,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:46:13,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:46:13,829 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:46:13,830 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-09-24 21:46:13,830 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:46:13,830 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 751 [2020-09-24 21:46:13,833 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:46:13,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 21:46:13,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-24 21:46:13,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-09-24 21:46:13,835 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-24 21:46:13,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:46:13,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:46:13,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:46:13,993 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:46:13,994 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-09-24 21:46:13,994 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:46:13,994 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-09-24 21:46:13,994 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:46:13,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 21:46:13,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:46:13,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-24 21:46:13,995 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:46:14,025 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:46:14,026 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [302305946] [2020-09-24 21:46:14,028 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 21:46:14,029 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-24 21:46:14,030 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900719861] [2020-09-24 21:46:14,037 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-24 21:46:14,037 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:46:14,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-24 21:46:14,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 21:46:14,059 INFO L87 Difference]: Start difference. First operand 456 states. Second operand 4 states. [2020-09-24 21:46:16,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:46:16,015 INFO L93 Difference]: Finished difference Result 1069 states and 1495 transitions. [2020-09-24 21:46:16,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-24 21:46:16,019 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 60 [2020-09-24 21:46:16,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:46:16,042 INFO L225 Difference]: With dead ends: 1069 [2020-09-24 21:46:16,042 INFO L226 Difference]: Without dead ends: 555 [2020-09-24 21:46:16,056 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-24 21:46:16,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 555 states. [2020-09-24 21:46:16,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 555 to 543. [2020-09-24 21:46:16,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 543 states. [2020-09-24 21:46:16,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 543 states to 543 states and 670 transitions. [2020-09-24 21:46:16,155 INFO L78 Accepts]: Start accepts. Automaton has 543 states and 670 transitions. Word has length 60 [2020-09-24 21:46:16,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:46:16,156 INFO L479 AbstractCegarLoop]: Abstraction has 543 states and 670 transitions. [2020-09-24 21:46:16,156 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-24 21:46:16,156 INFO L276 IsEmpty]: Start isEmpty. Operand 543 states and 670 transitions. [2020-09-24 21:46:16,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2020-09-24 21:46:16,165 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:46:16,165 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:46:16,165 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 21:46:16,166 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:46:16,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:46:16,166 INFO L82 PathProgramCache]: Analyzing trace with hash 495482008, now seen corresponding path program 1 times [2020-09-24 21:46:16,166 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:46:16,167 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [6825241] [2020-09-24 21:46:16,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:46:16,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:46:16,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:46:16,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:46:16,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:46:16,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:46:17,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:46:17,914 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:46:17,915 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 151 [2020-09-24 21:46:17,915 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-24 21:46:17,915 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1706 [2020-09-24 21:46:17,915 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:46:17,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 21:46:17,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 21:46:17,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 86 [2020-09-24 21:46:17,917 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:46:17,996 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:46:18,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:46:18,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:46:18,024 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:46:18,025 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-09-24 21:46:18,025 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:46:18,026 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-09-24 21:46:18,030 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:46:18,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 21:46:18,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:46:18,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-24 21:46:18,031 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:46:18,053 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-09-24 21:46:18,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:46:18,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:46:18,210 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:46:18,212 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-09-24 21:46:18,212 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:46:18,212 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 133 [2020-09-24 21:46:18,212 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:46:18,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 21:46:18,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-24 21:46:18,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-09-24 21:46:18,223 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 10 [2020-09-24 21:46:18,322 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:46:18,323 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [6825241] [2020-09-24 21:46:18,324 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 21:46:18,324 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-09-24 21:46:18,324 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084414918] [2020-09-24 21:46:18,326 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-24 21:46:18,327 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:46:18,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-24 21:46:18,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-09-24 21:46:18,328 INFO L87 Difference]: Start difference. First operand 543 states and 670 transitions. Second operand 7 states. [2020-09-24 21:46:20,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:46:20,768 INFO L93 Difference]: Finished difference Result 1503 states and 1930 transitions. [2020-09-24 21:46:20,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-24 21:46:20,769 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 140 [2020-09-24 21:46:20,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:46:20,778 INFO L225 Difference]: With dead ends: 1503 [2020-09-24 21:46:20,778 INFO L226 Difference]: Without dead ends: 975 [2020-09-24 21:46:20,783 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-09-24 21:46:20,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 975 states. [2020-09-24 21:46:20,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 975 to 892. [2020-09-24 21:46:20,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 892 states. [2020-09-24 21:46:20,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 892 states to 892 states and 1129 transitions. [2020-09-24 21:46:20,841 INFO L78 Accepts]: Start accepts. Automaton has 892 states and 1129 transitions. Word has length 140 [2020-09-24 21:46:20,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:46:20,842 INFO L479 AbstractCegarLoop]: Abstraction has 892 states and 1129 transitions. [2020-09-24 21:46:20,842 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-24 21:46:20,842 INFO L276 IsEmpty]: Start isEmpty. Operand 892 states and 1129 transitions. [2020-09-24 21:46:20,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-09-24 21:46:20,850 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:46:20,850 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:46:20,851 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 21:46:20,851 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:46:20,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:46:20,851 INFO L82 PathProgramCache]: Analyzing trace with hash -273743075, now seen corresponding path program 1 times [2020-09-24 21:46:20,852 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:46:20,852 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [549310163] [2020-09-24 21:46:20,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:46:20,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:46:20,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:46:21,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:46:21,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:46:21,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:46:22,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:46:22,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:46:23,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:46:24,831 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:46:24,832 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 160 [2020-09-24 21:46:24,832 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-24 21:46:24,832 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3932 [2020-09-24 21:46:24,833 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:46:24,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-09-24 21:46:24,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 21:46:24,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 128 [2020-09-24 21:46:24,834 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:46:24,981 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:46:24,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:46:24,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:46:25,026 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:46:25,027 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-09-24 21:46:25,027 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:46:25,027 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 41 [2020-09-24 21:46:25,028 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:46:25,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 21:46:25,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:46:25,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-09-24 21:46:25,032 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-24 21:46:25,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-09-24 21:46:25,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:46:25,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:46:25,417 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:46:25,417 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-09-24 21:46:25,417 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:46:25,417 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 320 [2020-09-24 21:46:25,418 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:46:25,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-24 21:46:25,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-24 21:46:25,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 84 [2020-09-24 21:46:25,419 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:46:25,614 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 27 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:46:25,614 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [549310163] [2020-09-24 21:46:25,615 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:46:25,615 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-09-24 21:46:25,615 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285580967] [2020-09-24 21:46:25,618 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-24 21:46:25,618 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:46:25,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-24 21:46:25,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-09-24 21:46:25,620 INFO L87 Difference]: Start difference. First operand 892 states and 1129 transitions. Second operand 12 states. [2020-09-24 21:46:29,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:46:29,535 INFO L93 Difference]: Finished difference Result 2762 states and 3746 transitions. [2020-09-24 21:46:29,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-24 21:46:29,541 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 149 [2020-09-24 21:46:29,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:46:29,568 INFO L225 Difference]: With dead ends: 2762 [2020-09-24 21:46:29,569 INFO L226 Difference]: Without dead ends: 1842 [2020-09-24 21:46:29,577 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=112, Invalid=308, Unknown=0, NotChecked=0, Total=420 [2020-09-24 21:46:29,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1842 states. [2020-09-24 21:46:29,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1842 to 1440. [2020-09-24 21:46:29,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1440 states. [2020-09-24 21:46:29,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1440 states to 1440 states and 1887 transitions. [2020-09-24 21:46:29,708 INFO L78 Accepts]: Start accepts. Automaton has 1440 states and 1887 transitions. Word has length 149 [2020-09-24 21:46:29,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:46:29,709 INFO L479 AbstractCegarLoop]: Abstraction has 1440 states and 1887 transitions. [2020-09-24 21:46:29,709 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-24 21:46:29,709 INFO L276 IsEmpty]: Start isEmpty. Operand 1440 states and 1887 transitions. [2020-09-24 21:46:29,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2020-09-24 21:46:29,724 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:46:29,724 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:46:29,724 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 21:46:29,724 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:46:29,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:46:29,729 INFO L82 PathProgramCache]: Analyzing trace with hash 1025965989, now seen corresponding path program 1 times [2020-09-24 21:46:29,729 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:46:29,730 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [490537349] [2020-09-24 21:46:29,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:46:29,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:46:29,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:46:30,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:46:30,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:46:30,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:46:30,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:46:32,172 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:46:32,173 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 162 [2020-09-24 21:46:32,173 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-24 21:46:32,173 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2410 [2020-09-24 21:46:32,173 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:46:32,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-24 21:46:32,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 21:46:32,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 150 [2020-09-24 21:46:32,174 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:46:32,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:46:32,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:46:32,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:46:32,271 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:46:32,272 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-09-24 21:46:32,272 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:46:32,272 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-09-24 21:46:32,273 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:46:32,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 21:46:32,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:46:32,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-24 21:46:32,274 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:46:32,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-09-24 21:46:32,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:46:32,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:46:32,433 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:46:32,433 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-09-24 21:46:32,433 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:46:32,434 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 130 [2020-09-24 21:46:32,434 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:46:32,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 21:46:32,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-24 21:46:32,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 86 [2020-09-24 21:46:32,435 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:46:32,529 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:46:32,529 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [490537349] [2020-09-24 21:46:32,529 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:46:32,530 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-24 21:46:32,530 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869181659] [2020-09-24 21:46:32,531 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-24 21:46:32,531 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:46:32,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-24 21:46:32,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-24 21:46:32,532 INFO L87 Difference]: Start difference. First operand 1440 states and 1887 transitions. Second operand 8 states. [2020-09-24 21:46:35,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:46:35,938 INFO L93 Difference]: Finished difference Result 4129 states and 5600 transitions. [2020-09-24 21:46:35,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-24 21:46:35,939 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 151 [2020-09-24 21:46:35,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:46:35,959 INFO L225 Difference]: With dead ends: 4129 [2020-09-24 21:46:35,960 INFO L226 Difference]: Without dead ends: 2854 [2020-09-24 21:46:35,967 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-09-24 21:46:35,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2854 states. [2020-09-24 21:46:36,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2854 to 2726. [2020-09-24 21:46:36,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2726 states. [2020-09-24 21:46:36,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2726 states to 2726 states and 3538 transitions. [2020-09-24 21:46:36,077 INFO L78 Accepts]: Start accepts. Automaton has 2726 states and 3538 transitions. Word has length 151 [2020-09-24 21:46:36,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:46:36,079 INFO L479 AbstractCegarLoop]: Abstraction has 2726 states and 3538 transitions. [2020-09-24 21:46:36,079 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-24 21:46:36,080 INFO L276 IsEmpty]: Start isEmpty. Operand 2726 states and 3538 transitions. [2020-09-24 21:46:36,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2020-09-24 21:46:36,087 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:46:36,087 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:46:36,087 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-24 21:46:36,087 INFO L427 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:46:36,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:46:36,088 INFO L82 PathProgramCache]: Analyzing trace with hash -1713924049, now seen corresponding path program 1 times [2020-09-24 21:46:36,088 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:46:36,088 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1389117867] [2020-09-24 21:46:36,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:46:36,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:46:36,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:46:36,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:46:36,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:46:38,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:46:38,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:46:38,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:46:39,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:46:41,144 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:46:41,145 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 179 [2020-09-24 21:46:41,145 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-24 21:46:41,145 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-09-24 21:46:41,146 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:46:41,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-09-24 21:46:41,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 21:46:41,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 141 [2020-09-24 21:46:41,146 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:46:41,273 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:46:41,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:46:41,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:46:41,303 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:46:41,303 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-09-24 21:46:41,304 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:46:41,304 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-09-24 21:46:41,305 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:46:41,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 21:46:41,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:46:41,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-09-24 21:46:41,306 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:46:41,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-09-24 21:46:41,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:46:41,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:46:41,653 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:46:41,653 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-09-24 21:46:41,654 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:46:41,654 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 288 [2020-09-24 21:46:41,654 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:46:41,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-24 21:46:41,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-24 21:46:41,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 103 [2020-09-24 21:46:41,656 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:46:41,994 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 26 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:46:41,994 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1389117867] [2020-09-24 21:46:41,995 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:46:41,995 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-09-24 21:46:41,995 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160217986] [2020-09-24 21:46:41,996 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-24 21:46:41,999 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:46:41,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-24 21:46:41,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2020-09-24 21:46:42,000 INFO L87 Difference]: Start difference. First operand 2726 states and 3538 transitions. Second operand 12 states. [2020-09-24 21:46:44,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:46:44,480 INFO L93 Difference]: Finished difference Result 5392 states and 7112 transitions. [2020-09-24 21:46:44,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-24 21:46:44,480 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 168 [2020-09-24 21:46:44,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:46:44,499 INFO L225 Difference]: With dead ends: 5392 [2020-09-24 21:46:44,499 INFO L226 Difference]: Without dead ends: 2809 [2020-09-24 21:46:44,508 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2020-09-24 21:46:44,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2809 states. [2020-09-24 21:46:44,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2809 to 2750. [2020-09-24 21:46:44,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2750 states. [2020-09-24 21:46:44,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2750 states to 2750 states and 3608 transitions. [2020-09-24 21:46:44,617 INFO L78 Accepts]: Start accepts. Automaton has 2750 states and 3608 transitions. Word has length 168 [2020-09-24 21:46:44,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:46:44,618 INFO L479 AbstractCegarLoop]: Abstraction has 2750 states and 3608 transitions. [2020-09-24 21:46:44,619 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-24 21:46:44,619 INFO L276 IsEmpty]: Start isEmpty. Operand 2750 states and 3608 transitions. [2020-09-24 21:46:44,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2020-09-24 21:46:44,623 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:46:44,624 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:46:44,624 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-24 21:46:44,624 INFO L427 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:46:44,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:46:44,625 INFO L82 PathProgramCache]: Analyzing trace with hash 2123062271, now seen corresponding path program 1 times [2020-09-24 21:46:44,625 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:46:44,625 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1435700758] [2020-09-24 21:46:44,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:46:44,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:46:44,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:46:44,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:46:44,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:46:47,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:46:47,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:46:49,317 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:46:49,318 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 193 [2020-09-24 21:46:49,318 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-24 21:46:49,318 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4654 [2020-09-24 21:46:49,318 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:46:49,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 21:46:49,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-24 21:46:49,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 124 [2020-09-24 21:46:49,319 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:46:49,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:46:49,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:46:49,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:46:49,390 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:46:49,390 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-09-24 21:46:49,391 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:46:49,391 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-09-24 21:46:49,391 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:46:49,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 21:46:49,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:46:49,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-24 21:46:49,392 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:46:49,406 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-09-24 21:46:49,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:46:49,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:46:49,665 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:46:49,665 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 118 [2020-09-24 21:46:49,666 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:46:49,666 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 235 [2020-09-24 21:46:49,667 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:46:49,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 21:46:49,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-24 21:46:49,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 117 [2020-09-24 21:46:49,668 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:46:49,858 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:46:49,858 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1435700758] [2020-09-24 21:46:49,861 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 21:46:49,861 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-09-24 21:46:49,862 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222720261] [2020-09-24 21:46:49,863 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-24 21:46:49,863 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:46:49,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-24 21:46:49,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-09-24 21:46:49,864 INFO L87 Difference]: Start difference. First operand 2750 states and 3608 transitions. Second operand 7 states. [2020-09-24 21:46:52,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:46:52,311 INFO L93 Difference]: Finished difference Result 6805 states and 9376 transitions. [2020-09-24 21:46:52,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-24 21:46:52,312 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 182 [2020-09-24 21:46:52,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:46:52,336 INFO L225 Difference]: With dead ends: 6805 [2020-09-24 21:46:52,336 INFO L226 Difference]: Without dead ends: 4220 [2020-09-24 21:46:52,348 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-09-24 21:46:52,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4220 states. [2020-09-24 21:46:52,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4220 to 3998. [2020-09-24 21:46:52,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3998 states. [2020-09-24 21:46:52,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3998 states to 3998 states and 5132 transitions. [2020-09-24 21:46:52,471 INFO L78 Accepts]: Start accepts. Automaton has 3998 states and 5132 transitions. Word has length 182 [2020-09-24 21:46:52,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:46:52,471 INFO L479 AbstractCegarLoop]: Abstraction has 3998 states and 5132 transitions. [2020-09-24 21:46:52,472 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-24 21:46:52,472 INFO L276 IsEmpty]: Start isEmpty. Operand 3998 states and 5132 transitions. [2020-09-24 21:46:52,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2020-09-24 21:46:52,476 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:46:52,476 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, 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] [2020-09-24 21:46:52,477 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-24 21:46:52,477 INFO L427 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:46:52,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:46:52,477 INFO L82 PathProgramCache]: Analyzing trace with hash -1717334707, now seen corresponding path program 1 times [2020-09-24 21:46:52,478 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:46:52,478 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [465398608] [2020-09-24 21:46:52,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:46:52,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:46:52,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:46:52,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:46:52,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:46:53,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:46:53,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:46:54,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:46:57,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:46:57,540 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:46:57,541 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 241 [2020-09-24 21:46:57,541 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-24 21:46:57,541 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5025 [2020-09-24 21:46:57,541 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:46:57,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-24 21:46:57,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 21:46:57,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 174 [2020-09-24 21:46:57,542 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:46:57,610 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:46:57,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:46:57,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:46:57,627 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:46:57,628 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-09-24 21:46:57,628 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:46:57,628 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-09-24 21:46:57,628 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:46:57,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 21:46:57,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:46:57,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-24 21:46:57,629 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:46:57,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-09-24 21:46:57,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:46:57,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:46:57,754 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:46:57,754 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-09-24 21:46:57,754 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:46:57,755 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 95 [2020-09-24 21:46:57,755 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:46:57,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 21:46:57,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-24 21:46:57,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-09-24 21:46:57,756 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:46:57,846 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2020-09-24 21:46:57,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:46:57,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:46:57,966 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:46:57,967 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-09-24 21:46:57,967 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:46:57,967 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 104 [2020-09-24 21:46:57,967 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:46:57,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 21:46:57,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-24 21:46:57,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 84 [2020-09-24 21:46:57,968 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0