/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_label54.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 21:40:32,612 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 21:40:32,617 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 21:40:32,662 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 21:40:32,663 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 21:40:32,670 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 21:40:32,672 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 21:40:32,676 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 21:40:32,678 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 21:40:32,679 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 21:40:32,681 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 21:40:32,682 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 21:40:32,683 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 21:40:32,684 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 21:40:32,685 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 21:40:32,686 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 21:40:32,687 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 21:40:32,688 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 21:40:32,689 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 21:40:32,691 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 21:40:32,693 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 21:40:32,694 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 21:40:32,695 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 21:40:32,696 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 21:40:32,698 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 21:40:32,698 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 21:40:32,698 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 21:40:32,699 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 21:40:32,700 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 21:40:32,701 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 21:40:32,701 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 21:40:32,702 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 21:40:32,703 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 21:40:32,705 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 21:40:32,706 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 21:40:32,706 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 21:40:32,707 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 21:40:32,707 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 21:40:32,708 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 21:40:32,709 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 21:40:32,710 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 21:40:32,711 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 21:40:32,736 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 21:40:32,737 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 21:40:32,738 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 21:40:32,738 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 21:40:32,739 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 21:40:32,739 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 21:40:32,739 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 21:40:32,739 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 21:40:32,739 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 21:40:32,740 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 21:40:32,740 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 21:40:32,740 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 21:40:32,740 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 21:40:32,740 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 21:40:32,741 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 21:40:32,741 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 21:40:32,741 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 21:40:32,741 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 21:40:32,741 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 21:40:32,742 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 21:40:32,742 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 21:40:32,742 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 21:40:32,742 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 21:40:32,742 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 21:40:32,743 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 21:40:32,743 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 21:40:32,743 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 21:40:32,743 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 21:40:32,743 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 21:40:32,744 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 21:40:33,187 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 21:40:33,210 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 21:40:33,216 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 21:40:33,218 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 21:40:33,219 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 21:40:33,220 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem01_label54.c [2020-09-24 21:40:33,300 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/23820dc9e/b82015d19c95486fad9dbe48f0655ec9/FLAGb1c5cc7f4 [2020-09-24 21:40:33,894 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 21:40:33,895 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem01_label54.c [2020-09-24 21:40:33,912 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/23820dc9e/b82015d19c95486fad9dbe48f0655ec9/FLAGb1c5cc7f4 [2020-09-24 21:40:34,116 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/23820dc9e/b82015d19c95486fad9dbe48f0655ec9 [2020-09-24 21:40:34,132 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 21:40:34,138 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 21:40:34,139 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 21:40:34,139 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 21:40:34,144 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 21:40:34,145 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 09:40:34" (1/1) ... [2020-09-24 21:40:34,149 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6d72532b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:40:34, skipping insertion in model container [2020-09-24 21:40:34,150 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 09:40:34" (1/1) ... [2020-09-24 21:40:34,159 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 21:40:34,212 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 21:40:34,680 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 21:40:34,688 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 21:40:34,905 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 21:40:34,925 INFO L208 MainTranslator]: Completed translation [2020-09-24 21:40:34,926 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:40:34 WrapperNode [2020-09-24 21:40:34,926 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 21:40:34,927 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 21:40:34,927 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 21:40:34,927 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 21:40:34,943 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:40:34" (1/1) ... [2020-09-24 21:40:34,944 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:40:34" (1/1) ... [2020-09-24 21:40:34,962 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:40:34" (1/1) ... [2020-09-24 21:40:34,963 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:40:34" (1/1) ... [2020-09-24 21:40:35,007 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:40:34" (1/1) ... [2020-09-24 21:40:35,024 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:40:34" (1/1) ... [2020-09-24 21:40:35,029 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:40:34" (1/1) ... [2020-09-24 21:40:35,036 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 21:40:35,037 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 21:40:35,037 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 21:40:35,037 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 21:40:35,039 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:40:34" (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 21:40:35,122 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 21:40:35,123 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 21:40:35,123 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-09-24 21:40:35,123 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 21:40:35,123 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-09-24 21:40:35,124 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 21:40:35,124 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-24 21:40:35,124 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-09-24 21:40:35,124 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 21:40:35,124 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 21:40:35,125 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 21:40:36,434 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 21:40:36,434 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-24 21:40:36,451 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 09:40:36 BoogieIcfgContainer [2020-09-24 21:40:36,451 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 21:40:36,456 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 21:40:36,456 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 21:40:36,463 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 21:40:36,463 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 09:40:34" (1/3) ... [2020-09-24 21:40:36,464 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33478af7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 09:40:36, skipping insertion in model container [2020-09-24 21:40:36,465 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:40:34" (2/3) ... [2020-09-24 21:40:36,466 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33478af7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 09:40:36, skipping insertion in model container [2020-09-24 21:40:36,466 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 09:40:36" (3/3) ... [2020-09-24 21:40:36,469 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem01_label54.c [2020-09-24 21:40:36,484 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 21:40:36,502 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 21:40:36,528 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 21:40:36,569 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 21:40:36,570 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 21:40:36,570 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 21:40:36,570 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 21:40:36,570 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 21:40:36,571 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 21:40:36,571 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 21:40:36,571 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 21:40:36,612 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states. [2020-09-24 21:40:36,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2020-09-24 21:40:36,652 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:40:36,654 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:40:36,654 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:40:36,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:40:36,663 INFO L82 PathProgramCache]: Analyzing trace with hash -1970187929, now seen corresponding path program 1 times [2020-09-24 21:40:36,676 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:40:36,676 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1036488076] [2020-09-24 21:40:36,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:40:36,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:40:37,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:37,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:37,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:38,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:40,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:41,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:41,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:41,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:42,020 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:40:42,020 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 159 [2020-09-24 21:40:42,020 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-24 21:40:42,021 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5049 [2020-09-24 21:40:42,024 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:40:42,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-09-24 21:40:42,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-24 21:40:42,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 79 [2020-09-24 21:40:42,025 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-24 21:40:42,860 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 44 [2020-09-24 21:40:43,035 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 42 [2020-09-24 21:40:43,242 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 38 [2020-09-24 21:40:43,392 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 35 [2020-09-24 21:40:43,522 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 34 [2020-09-24 21:40:43,661 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 30 [2020-09-24 21:40:43,721 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:40:43,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:40:43,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:43,814 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:40:43,814 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-24 21:40:43,815 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:40:43,815 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 85 [2020-09-24 21:40:43,815 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:40:43,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-24 21:40:43,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:40:43,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-09-24 21:40:43,816 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:40:44,176 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 21:40:44,177 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1036488076] [2020-09-24 21:40:44,180 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 21:40:44,180 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2020-09-24 21:40:44,181 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410236016] [2020-09-24 21:40:44,188 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-24 21:40:44,189 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:40:44,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-24 21:40:44,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2020-09-24 21:40:44,212 INFO L87 Difference]: Start difference. First operand 525 states. Second operand 18 states. [2020-09-24 21:40:44,789 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2020-09-24 21:40:44,957 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 114 [2020-09-24 21:40:45,286 WARN L193 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 111 [2020-09-24 21:40:45,604 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 108 [2020-09-24 21:40:46,185 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 105 [2020-09-24 21:40:47,359 WARN L193 SmtUtils]: Spent 312.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 102 [2020-09-24 21:40:47,986 WARN L193 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 97 [2020-09-24 21:40:49,172 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 84 [2020-09-24 21:40:50,230 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 78 [2020-09-24 21:40:53,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:40:53,012 INFO L93 Difference]: Finished difference Result 1701 states and 2422 transitions. [2020-09-24 21:40:53,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-24 21:40:53,014 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 150 [2020-09-24 21:40:53,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:40:53,042 INFO L225 Difference]: With dead ends: 1701 [2020-09-24 21:40:53,042 INFO L226 Difference]: Without dead ends: 1103 [2020-09-24 21:40:53,055 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=348, Invalid=842, Unknown=0, NotChecked=0, Total=1190 [2020-09-24 21:40:53,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1103 states. [2020-09-24 21:40:53,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1103 to 985. [2020-09-24 21:40:53,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 985 states. [2020-09-24 21:40:53,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 985 states to 985 states and 1149 transitions. [2020-09-24 21:40:53,233 INFO L78 Accepts]: Start accepts. Automaton has 985 states and 1149 transitions. Word has length 150 [2020-09-24 21:40:53,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:40:53,234 INFO L479 AbstractCegarLoop]: Abstraction has 985 states and 1149 transitions. [2020-09-24 21:40:53,234 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-24 21:40:53,234 INFO L276 IsEmpty]: Start isEmpty. Operand 985 states and 1149 transitions. [2020-09-24 21:40:53,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2020-09-24 21:40:53,242 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:40:53,242 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:40:53,243 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 21:40:53,243 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:40:53,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:40:53,243 INFO L82 PathProgramCache]: Analyzing trace with hash -1716709436, now seen corresponding path program 1 times [2020-09-24 21:40:53,244 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:40:53,244 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2064659427] [2020-09-24 21:40:53,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:40:53,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:40:53,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:53,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:53,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:54,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:56,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:56,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:57,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:58,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:58,454 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:40:58,456 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 178 [2020-09-24 21:40:58,456 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-24 21:40:58,456 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5145 [2020-09-24 21:40:58,458 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:40:58,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-09-24 21:40:58,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-24 21:40:58,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 104 [2020-09-24 21:40:58,472 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 15 [2020-09-24 21:40:59,247 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 38 [2020-09-24 21:40:59,499 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 34 [2020-09-24 21:40:59,765 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 29 [2020-09-24 21:40:59,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:40:59,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:40:59,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:59,929 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:40:59,929 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-24 21:40:59,929 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:40:59,930 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 71 [2020-09-24 21:40:59,930 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:40:59,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 21:40:59,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:40:59,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-09-24 21:40:59,931 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:41:00,051 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-09-24 21:41:00,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:41:00,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:00,115 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:41:00,115 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-24 21:41:00,115 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:41:00,116 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 58 [2020-09-24 21:41:00,116 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:41:00,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 21:41:00,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-24 21:41:00,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-09-24 21:41:00,117 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:41:00,377 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 21:41:00,378 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2064659427] [2020-09-24 21:41:00,378 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:41:00,379 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-09-24 21:41:00,379 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40113588] [2020-09-24 21:41:00,381 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-24 21:41:00,381 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:41:00,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-24 21:41:00,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=327, Unknown=0, NotChecked=0, Total=420 [2020-09-24 21:41:00,382 INFO L87 Difference]: Start difference. First operand 985 states and 1149 transitions. Second operand 21 states. [2020-09-24 21:41:01,158 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2020-09-24 21:41:01,312 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 92 [2020-09-24 21:41:02,215 WARN L193 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 90 [2020-09-24 21:41:04,300 WARN L193 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 89 [2020-09-24 21:41:05,213 WARN L193 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 88 [2020-09-24 21:41:06,039 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2020-09-24 21:41:06,394 WARN L193 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 85 [2020-09-24 21:41:08,512 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 83 [2020-09-24 21:41:09,051 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 81 [2020-09-24 21:41:09,502 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 79 [2020-09-24 21:41:09,766 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 77 [2020-09-24 21:41:10,019 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 74 [2020-09-24 21:41:11,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:41:11,775 INFO L93 Difference]: Finished difference Result 2272 states and 2665 transitions. [2020-09-24 21:41:11,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-09-24 21:41:11,776 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 167 [2020-09-24 21:41:11,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:41:11,792 INFO L225 Difference]: With dead ends: 2272 [2020-09-24 21:41:11,792 INFO L226 Difference]: Without dead ends: 1375 [2020-09-24 21:41:11,799 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 734 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=744, Invalid=1908, Unknown=0, NotChecked=0, Total=2652 [2020-09-24 21:41:11,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1375 states. [2020-09-24 21:41:11,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1375 to 1226. [2020-09-24 21:41:11,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1226 states. [2020-09-24 21:41:11,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1226 states to 1226 states and 1424 transitions. [2020-09-24 21:41:11,868 INFO L78 Accepts]: Start accepts. Automaton has 1226 states and 1424 transitions. Word has length 167 [2020-09-24 21:41:11,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:41:11,872 INFO L479 AbstractCegarLoop]: Abstraction has 1226 states and 1424 transitions. [2020-09-24 21:41:11,872 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-24 21:41:11,872 INFO L276 IsEmpty]: Start isEmpty. Operand 1226 states and 1424 transitions. [2020-09-24 21:41:11,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2020-09-24 21:41:11,880 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:41:11,881 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:41:11,881 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 21:41:11,882 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:41:11,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:41:11,882 INFO L82 PathProgramCache]: Analyzing trace with hash 1294407158, now seen corresponding path program 1 times [2020-09-24 21:41:11,882 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:41:11,883 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1215947987] [2020-09-24 21:41:11,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:41:11,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:41:11,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:12,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:12,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:12,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:13,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:15,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:16,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:16,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:16,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:16,948 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:41:16,948 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 182 [2020-09-24 21:41:16,948 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-09-24 21:41:16,948 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-09-24 21:41:16,949 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:41:16,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-09-24 21:41:16,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-24 21:41:16,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 138 [2020-09-24 21:41:16,950 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:41:17,432 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:41:17,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:41:17,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:17,510 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:41:17,511 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-24 21:41:17,511 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:41:17,513 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 68 [2020-09-24 21:41:17,513 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:41:17,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 21:41:17,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:41:17,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-09-24 21:41:17,515 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:41:17,608 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-09-24 21:41:17,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:41:17,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:17,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:17,725 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:41:17,726 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-09-24 21:41:17,726 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:41:17,727 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 111 [2020-09-24 21:41:17,727 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:41:17,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-24 21:41:17,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-24 21:41:17,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-24 21:41:17,729 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:41:18,300 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 21:41:18,300 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1215947987] [2020-09-24 21:41:18,301 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:41:18,301 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-24 21:41:18,302 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842148593] [2020-09-24 21:41:18,303 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-24 21:41:18,306 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:41:18,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-24 21:41:18,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2020-09-24 21:41:18,308 INFO L87 Difference]: Start difference. First operand 1226 states and 1424 transitions. Second operand 13 states. [2020-09-24 21:41:19,220 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 75 [2020-09-24 21:41:19,602 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 70 [2020-09-24 21:41:20,204 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 70 [2020-09-24 21:41:20,379 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 64 [2020-09-24 21:41:20,654 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 73 [2020-09-24 21:41:22,092 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 69 [2020-09-24 21:41:25,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:41:25,483 INFO L93 Difference]: Finished difference Result 3270 states and 3993 transitions. [2020-09-24 21:41:25,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-24 21:41:25,484 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 171 [2020-09-24 21:41:25,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:41:25,494 INFO L225 Difference]: With dead ends: 3270 [2020-09-24 21:41:25,494 INFO L226 Difference]: Without dead ends: 1872 [2020-09-24 21:41:25,500 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=307, Invalid=749, Unknown=0, NotChecked=0, Total=1056 [2020-09-24 21:41:25,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1872 states. [2020-09-24 21:41:25,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1872 to 1523. [2020-09-24 21:41:25,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1523 states. [2020-09-24 21:41:25,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1523 states to 1523 states and 1757 transitions. [2020-09-24 21:41:25,550 INFO L78 Accepts]: Start accepts. Automaton has 1523 states and 1757 transitions. Word has length 171 [2020-09-24 21:41:25,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:41:25,550 INFO L479 AbstractCegarLoop]: Abstraction has 1523 states and 1757 transitions. [2020-09-24 21:41:25,550 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-24 21:41:25,551 INFO L276 IsEmpty]: Start isEmpty. Operand 1523 states and 1757 transitions. [2020-09-24 21:41:25,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2020-09-24 21:41:25,556 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:41:25,556 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:41:25,556 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 21:41:25,557 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:41:25,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:41:25,557 INFO L82 PathProgramCache]: Analyzing trace with hash 1585870184, now seen corresponding path program 1 times [2020-09-24 21:41:25,557 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:41:25,558 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [893840593] [2020-09-24 21:41:25,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:41:25,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:41:25,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:25,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking...