/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/Problem01_label36.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 21:39:44,057 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 21:39:44,061 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 21:39:44,087 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 21:39:44,088 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 21:39:44,089 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 21:39:44,090 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 21:39:44,092 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 21:39:44,094 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 21:39:44,095 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 21:39:44,096 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 21:39:44,098 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 21:39:44,098 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 21:39:44,099 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 21:39:44,103 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 21:39:44,105 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 21:39:44,108 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 21:39:44,111 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 21:39:44,113 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 21:39:44,117 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 21:39:44,120 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 21:39:44,123 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 21:39:44,125 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 21:39:44,126 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 21:39:44,131 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 21:39:44,131 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 21:39:44,131 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 21:39:44,135 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 21:39:44,136 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 21:39:44,137 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 21:39:44,137 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 21:39:44,138 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 21:39:44,139 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 21:39:44,139 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 21:39:44,141 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 21:39:44,141 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 21:39:44,142 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 21:39:44,142 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 21:39:44,142 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 21:39:44,143 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 21:39:44,145 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 21:39:44,146 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 21:39:44,206 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 21:39:44,207 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 21:39:44,210 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 21:39:44,210 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 21:39:44,210 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 21:39:44,210 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 21:39:44,210 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 21:39:44,211 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 21:39:44,212 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 21:39:44,212 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 21:39:44,212 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 21:39:44,212 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 21:39:44,212 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 21:39:44,213 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 21:39:44,213 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 21:39:44,213 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 21:39:44,213 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 21:39:44,213 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 21:39:44,214 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 21:39:44,215 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 21:39:44,215 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 21:39:44,215 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 21:39:44,215 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 21:39:44,216 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 21:39:44,216 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 21:39:44,216 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 21:39:44,217 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 21:39:44,217 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 21:39:44,217 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 21:39:44,217 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 21:39:44,700 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 21:39:44,729 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 21:39:44,734 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 21:39:44,737 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 21:39:44,737 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 21:39:44,739 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem01_label36.c [2020-09-24 21:39:44,833 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5fcbf4ec3/d7324c97bf4a491f8e231b63cbeb340d/FLAGa8dd03e87 [2020-09-24 21:39:45,517 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 21:39:45,518 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem01_label36.c [2020-09-24 21:39:45,532 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5fcbf4ec3/d7324c97bf4a491f8e231b63cbeb340d/FLAGa8dd03e87 [2020-09-24 21:39:45,704 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5fcbf4ec3/d7324c97bf4a491f8e231b63cbeb340d [2020-09-24 21:39:45,721 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 21:39:45,727 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 21:39:45,730 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 21:39:45,731 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 21:39:45,735 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 21:39:45,736 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 09:39:45" (1/1) ... [2020-09-24 21:39:45,741 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6251f5ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:39:45, skipping insertion in model container [2020-09-24 21:39:45,742 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 09:39:45" (1/1) ... [2020-09-24 21:39:45,752 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 21:39:45,820 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 21:39:46,326 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 21:39:46,335 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 21:39:46,552 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 21:39:46,572 INFO L208 MainTranslator]: Completed translation [2020-09-24 21:39:46,573 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:39:46 WrapperNode [2020-09-24 21:39:46,573 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 21:39:46,574 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 21:39:46,574 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 21:39:46,574 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 21:39:46,589 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:39:46" (1/1) ... [2020-09-24 21:39:46,590 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:39:46" (1/1) ... [2020-09-24 21:39:46,610 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:39:46" (1/1) ... [2020-09-24 21:39:46,610 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:39:46" (1/1) ... [2020-09-24 21:39:46,657 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:39:46" (1/1) ... [2020-09-24 21:39:46,672 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:39:46" (1/1) ... [2020-09-24 21:39:46,678 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:39:46" (1/1) ... [2020-09-24 21:39:46,685 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 21:39:46,686 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 21:39:46,686 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 21:39:46,686 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 21:39:46,687 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:39:46" (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 21:39:46,765 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 21:39:46,766 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 21:39:46,766 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-09-24 21:39:46,766 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 21:39:46,766 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-09-24 21:39:46,766 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 21:39:46,766 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-24 21:39:46,766 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-09-24 21:39:46,767 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 21:39:46,767 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 21:39:46,767 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 21:39:48,122 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 21:39:48,123 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-24 21:39:48,132 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 09:39:48 BoogieIcfgContainer [2020-09-24 21:39:48,132 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 21:39:48,133 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 21:39:48,133 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 21:39:48,137 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 21:39:48,138 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 09:39:45" (1/3) ... [2020-09-24 21:39:48,139 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f7e11e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 09:39:48, skipping insertion in model container [2020-09-24 21:39:48,139 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:39:46" (2/3) ... [2020-09-24 21:39:48,140 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f7e11e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 09:39:48, skipping insertion in model container [2020-09-24 21:39:48,140 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 09:39:48" (3/3) ... [2020-09-24 21:39:48,142 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem01_label36.c [2020-09-24 21:39:48,154 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 21:39:48,165 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 21:39:48,188 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 21:39:48,223 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 21:39:48,223 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 21:39:48,223 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 21:39:48,223 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 21:39:48,223 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 21:39:48,224 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 21:39:48,224 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 21:39:48,224 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 21:39:48,257 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states. [2020-09-24 21:39:48,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-09-24 21:39:48,277 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:39:48,279 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:39:48,279 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:39:48,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:39:48,286 INFO L82 PathProgramCache]: Analyzing trace with hash -888076393, now seen corresponding path program 1 times [2020-09-24 21:39:48,295 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:39:48,295 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [79838605] [2020-09-24 21:39:48,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:39:48,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:39:48,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:48,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:49,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:50,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:51,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:53,567 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:39:53,567 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 139 [2020-09-24 21:39:53,567 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-24 21:39:53,567 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-09-24 21:39:53,571 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:39:53,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-09-24 21:39:53,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-24 21:39:53,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 79 [2020-09-24 21:39:53,572 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-24 21:39:54,467 WARN L193 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 45 [2020-09-24 21:39:54,660 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 42 [2020-09-24 21:39:54,837 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 38 [2020-09-24 21:39:54,998 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 35 [2020-09-24 21:39:55,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:39:55,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:39:55,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:55,379 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:39:55,380 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-24 21:39:55,380 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:39:55,380 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 105 [2020-09-24 21:39:55,382 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:39:55,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-24 21:39:55,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:39:55,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-09-24 21:39:55,383 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:39:55,778 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 21:39:55,779 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [79838605] [2020-09-24 21:39:55,782 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 21:39:55,783 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2020-09-24 21:39:55,784 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959499889] [2020-09-24 21:39:55,792 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-24 21:39:55,793 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:39:55,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-24 21:39:55,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2020-09-24 21:39:55,815 INFO L87 Difference]: Start difference. First operand 525 states. Second operand 19 states. [2020-09-24 21:39:56,294 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 82 [2020-09-24 21:39:56,484 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 82 [2020-09-24 21:39:56,776 WARN L193 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 102 [2020-09-24 21:39:57,102 WARN L193 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 99 [2020-09-24 21:39:57,476 WARN L193 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 96 [2020-09-24 21:39:58,025 WARN L193 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 93 [2020-09-24 21:39:58,975 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 90 [2020-09-24 21:39:59,535 WARN L193 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 85 [2020-09-24 21:40:01,219 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 78 [2020-09-24 21:40:03,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:40:03,785 INFO L93 Difference]: Finished difference Result 1701 states and 2422 transitions. [2020-09-24 21:40:03,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-24 21:40:03,787 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 130 [2020-09-24 21:40:03,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:40:03,831 INFO L225 Difference]: With dead ends: 1701 [2020-09-24 21:40:03,831 INFO L226 Difference]: Without dead ends: 1103 [2020-09-24 21:40:03,847 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=327, Invalid=795, Unknown=0, NotChecked=0, Total=1122 [2020-09-24 21:40:03,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1103 states. [2020-09-24 21:40:03,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1103 to 985. [2020-09-24 21:40:03,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 985 states. [2020-09-24 21:40:03,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 985 states to 985 states and 1150 transitions. [2020-09-24 21:40:03,994 INFO L78 Accepts]: Start accepts. Automaton has 985 states and 1150 transitions. Word has length 130 [2020-09-24 21:40:03,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:40:03,995 INFO L479 AbstractCegarLoop]: Abstraction has 985 states and 1150 transitions. [2020-09-24 21:40:03,995 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-24 21:40:03,995 INFO L276 IsEmpty]: Start isEmpty. Operand 985 states and 1150 transitions. [2020-09-24 21:40:04,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2020-09-24 21:40:04,019 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:40:04,019 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:40:04,019 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 21:40:04,021 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:40:04,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:40:04,021 INFO L82 PathProgramCache]: Analyzing trace with hash -471343500, now seen corresponding path program 1 times [2020-09-24 21:40:04,022 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:40:04,022 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2145088544] [2020-09-24 21:40:04,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:40:04,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:40:04,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:04,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:04,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:05,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:06,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:07,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:08,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:09,099 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:40:09,099 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 158 [2020-09-24 21:40:09,100 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-24 21:40:09,100 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-09-24 21:40:09,100 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:40:09,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-09-24 21:40:09,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-24 21:40:09,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 104 [2020-09-24 21:40:09,101 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:40:09,830 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 47 [2020-09-24 21:40:10,010 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 47 [2020-09-24 21:40:10,250 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 52 [2020-09-24 21:40:10,498 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 49 [2020-09-24 21:40:10,737 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 45 [2020-09-24 21:40:10,959 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 41 [2020-09-24 21:40:11,139 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 35 [2020-09-24 21:40:11,196 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:40:11,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:40:11,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:11,273 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:40:11,273 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-24 21:40:11,273 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:40:11,273 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 69 [2020-09-24 21:40:11,274 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:40:11,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 21:40:11,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:40:11,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-09-24 21:40:11,274 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:40:11,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-09-24 21:40:11,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:40:11,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:11,451 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:40:11,452 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-24 21:40:11,452 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:40:11,452 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 57 [2020-09-24 21:40:11,453 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:40:11,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 21:40:11,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-24 21:40:11,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-09-24 21:40:11,454 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:40:11,879 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:40:11,879 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2145088544] [2020-09-24 21:40:11,880 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:40:11,880 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-09-24 21:40:11,880 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888620800] [2020-09-24 21:40:11,882 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-24 21:40:11,883 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:40:11,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-24 21:40:11,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=327, Unknown=0, NotChecked=0, Total=420 [2020-09-24 21:40:11,883 INFO L87 Difference]: Start difference. First operand 985 states and 1150 transitions. Second operand 21 states. [2020-09-24 21:40:12,762 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 50 [2020-09-24 21:40:13,092 WARN L193 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 98 [2020-09-24 21:40:13,518 WARN L193 SmtUtils]: Spent 388.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 118 [2020-09-24 21:40:13,936 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 69 [2020-09-24 21:40:14,902 WARN L193 SmtUtils]: Spent 436.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 114 [2020-09-24 21:40:15,282 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 67 [2020-09-24 21:40:15,782 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 68 [2020-09-24 21:40:16,248 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 66 [2020-09-24 21:40:17,182 WARN L193 SmtUtils]: Spent 383.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 111 [2020-09-24 21:40:17,787 WARN L193 SmtUtils]: Spent 321.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 96 [2020-09-24 21:40:18,372 WARN L193 SmtUtils]: Spent 375.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 108 [2020-09-24 21:40:18,913 WARN L193 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 93 [2020-09-24 21:40:19,414 WARN L193 SmtUtils]: Spent 347.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 105 [2020-09-24 21:40:19,849 WARN L193 SmtUtils]: Spent 336.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 100 [2020-09-24 21:40:20,126 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 73 [2020-09-24 21:40:20,514 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 89 [2020-09-24 21:40:20,839 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 85 [2020-09-24 21:40:21,195 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 78 [2020-09-24 21:40:22,325 WARN L193 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 95 [2020-09-24 21:40:22,844 WARN L193 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 92 [2020-09-24 21:40:23,312 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 88 [2020-09-24 21:40:23,610 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 84 [2020-09-24 21:40:23,907 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 77 [2020-09-24 21:40:24,330 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 69 [2020-09-24 21:40:25,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:40:25,314 INFO L93 Difference]: Finished difference Result 2267 states and 2663 transitions. [2020-09-24 21:40:25,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-09-24 21:40:25,318 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 147 [2020-09-24 21:40:25,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:40:25,336 INFO L225 Difference]: With dead ends: 2267 [2020-09-24 21:40:25,336 INFO L226 Difference]: Without dead ends: 1370 [2020-09-24 21:40:25,345 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 893 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=854, Invalid=2338, Unknown=0, NotChecked=0, Total=3192 [2020-09-24 21:40:25,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1370 states. [2020-09-24 21:40:25,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1370 to 1212. [2020-09-24 21:40:25,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1212 states. [2020-09-24 21:40:25,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1212 states to 1212 states and 1411 transitions. [2020-09-24 21:40:25,431 INFO L78 Accepts]: Start accepts. Automaton has 1212 states and 1411 transitions. Word has length 147 [2020-09-24 21:40:25,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:40:25,435 INFO L479 AbstractCegarLoop]: Abstraction has 1212 states and 1411 transitions. [2020-09-24 21:40:25,435 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-24 21:40:25,435 INFO L276 IsEmpty]: Start isEmpty. Operand 1212 states and 1411 transitions. [2020-09-24 21:40:25,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2020-09-24 21:40:25,442 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:40:25,443 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:40:25,443 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 21:40:25,443 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:40:25,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:40:25,444 INFO L82 PathProgramCache]: Analyzing trace with hash 2092263846, now seen corresponding path program 1 times [2020-09-24 21:40:25,445 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:40:25,445 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1598339737] [2020-09-24 21:40:25,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:40:25,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:40:25,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:25,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:25,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:26,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:26,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:27,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:27,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:29,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:29,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:29,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:30,501 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:40:30,501 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 162 [2020-09-24 21:40:30,501 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-09-24 21:40:30,501 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-09-24 21:40:30,502 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:40:30,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-09-24 21:40:30,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-24 21:40:30,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 138 [2020-09-24 21:40:30,502 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:40:30,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:40:30,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:40:30,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:30,769 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:40:30,771 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-24 21:40:30,776 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:40:30,776 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 65 [2020-09-24 21:40:30,777 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:40:30,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 21:40:30,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:40:30,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-09-24 21:40:30,778 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:40:30,860 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-09-24 21:40:30,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:40:30,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:30,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:31,007 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:40:31,007 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-09-24 21:40:31,007 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:40:31,008 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 141 [2020-09-24 21:40:31,019 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:40:31,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-24 21:40:31,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-24 21:40:31,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-24 21:40:31,022 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-24 21:40:31,353 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:40:31,353 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1598339737] [2020-09-24 21:40:31,354 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:40:31,354 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-24 21:40:31,355 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287216358] [2020-09-24 21:40:31,356 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-24 21:40:31,356 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:40:31,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-24 21:40:31,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2020-09-24 21:40:31,357 INFO L87 Difference]: Start difference. First operand 1212 states and 1411 transitions. Second operand 13 states. [2020-09-24 21:40:37,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:40:37,837 INFO L93 Difference]: Finished difference Result 3252 states and 3978 transitions. [2020-09-24 21:40:37,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-24 21:40:37,839 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 151 [2020-09-24 21:40:37,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:40:37,856 INFO L225 Difference]: With dead ends: 3252 [2020-09-24 21:40:37,856 INFO L226 Difference]: Without dead ends: 2009 [2020-09-24 21:40:37,863 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=307, Invalid=749, Unknown=0, NotChecked=0, Total=1056 [2020-09-24 21:40:37,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2009 states. [2020-09-24 21:40:37,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2009 to 1648. [2020-09-24 21:40:37,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1648 states. [2020-09-24 21:40:37,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1648 states to 1648 states and 1888 transitions. [2020-09-24 21:40:37,928 INFO L78 Accepts]: Start accepts. Automaton has 1648 states and 1888 transitions. Word has length 151 [2020-09-24 21:40:37,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:40:37,929 INFO L479 AbstractCegarLoop]: Abstraction has 1648 states and 1888 transitions. [2020-09-24 21:40:37,929 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-24 21:40:37,929 INFO L276 IsEmpty]: Start isEmpty. Operand 1648 states and 1888 transitions. [2020-09-24 21:40:37,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2020-09-24 21:40:37,934 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:40:37,934 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:40:37,935 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 21:40:37,935 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:40:37,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:40:37,936 INFO L82 PathProgramCache]: Analyzing trace with hash -2002946746, now seen corresponding path program 1 times [2020-09-24 21:40:37,936 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:40:37,936 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [228794850] [2020-09-24 21:40:37,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:40:37,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:40:38,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:38,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking...