/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_label10.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 21:39:03,627 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 21:39:03,631 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 21:39:03,659 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 21:39:03,659 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 21:39:03,660 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 21:39:03,662 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 21:39:03,664 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 21:39:03,666 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 21:39:03,666 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 21:39:03,668 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 21:39:03,669 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 21:39:03,669 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 21:39:03,670 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 21:39:03,672 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 21:39:03,673 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 21:39:03,674 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 21:39:03,675 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 21:39:03,677 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 21:39:03,680 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 21:39:03,681 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 21:39:03,683 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 21:39:03,684 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 21:39:03,685 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 21:39:03,688 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 21:39:03,688 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 21:39:03,688 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 21:39:03,690 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 21:39:03,690 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 21:39:03,691 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 21:39:03,691 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 21:39:03,692 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 21:39:03,693 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 21:39:03,694 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 21:39:03,695 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 21:39:03,696 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 21:39:03,696 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 21:39:03,697 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 21:39:03,697 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 21:39:03,698 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 21:39:03,699 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 21:39:03,700 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 21:39:03,734 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 21:39:03,734 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 21:39:03,736 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 21:39:03,737 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 21:39:03,737 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 21:39:03,737 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 21:39:03,737 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 21:39:03,738 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 21:39:03,738 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 21:39:03,738 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 21:39:03,739 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 21:39:03,739 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 21:39:03,739 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 21:39:03,740 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 21:39:03,740 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 21:39:03,740 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 21:39:03,741 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 21:39:03,741 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 21:39:03,741 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 21:39:03,741 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 21:39:03,742 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 21:39:03,742 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 21:39:03,742 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 21:39:03,742 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 21:39:03,742 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 21:39:03,743 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 21:39:03,743 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 21:39:03,743 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 21:39:03,743 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 21:39:03,743 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 21:39:04,179 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 21:39:04,197 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 21:39:04,201 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 21:39:04,203 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 21:39:04,203 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 21:39:04,204 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem01_label10.c [2020-09-24 21:39:04,296 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1454a9466/eefabbc34d8b471793d76d883ce0a0a6/FLAGc7d3a8d66 [2020-09-24 21:39:04,929 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 21:39:04,929 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem01_label10.c [2020-09-24 21:39:04,945 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1454a9466/eefabbc34d8b471793d76d883ce0a0a6/FLAGc7d3a8d66 [2020-09-24 21:39:05,157 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1454a9466/eefabbc34d8b471793d76d883ce0a0a6 [2020-09-24 21:39:05,169 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 21:39:05,174 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 21:39:05,175 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 21:39:05,175 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 21:39:05,179 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 21:39:05,180 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 09:39:05" (1/1) ... [2020-09-24 21:39:05,184 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 09:39:05, skipping insertion in model container [2020-09-24 21:39:05,184 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 09:39:05" (1/1) ... [2020-09-24 21:39:05,193 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 21:39:05,256 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 21:39:05,703 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 21:39:05,709 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 21:39:05,918 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 21:39:05,940 INFO L208 MainTranslator]: Completed translation [2020-09-24 21:39:05,941 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:39:05 WrapperNode [2020-09-24 21:39:05,941 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 21:39:05,942 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 21:39:05,942 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 21:39:05,942 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 21:39:05,959 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:39:05" (1/1) ... [2020-09-24 21:39:05,960 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:39:05" (1/1) ... [2020-09-24 21:39:05,996 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:39:05" (1/1) ... [2020-09-24 21:39:05,997 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:39:05" (1/1) ... [2020-09-24 21:39:06,069 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:39:05" (1/1) ... [2020-09-24 21:39:06,095 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:39:05" (1/1) ... [2020-09-24 21:39:06,100 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:39:05" (1/1) ... [2020-09-24 21:39:06,106 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 21:39:06,107 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 21:39:06,107 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 21:39:06,107 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 21:39:06,109 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:39:05" (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 21:39:06,194 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 21:39:06,195 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 21:39:06,195 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-09-24 21:39:06,195 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 21:39:06,195 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-09-24 21:39:06,196 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 21:39:06,196 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-24 21:39:06,196 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-09-24 21:39:06,196 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 21:39:06,196 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 21:39:06,197 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 21:39:07,664 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 21:39:07,665 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-24 21:39:07,674 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 09:39:07 BoogieIcfgContainer [2020-09-24 21:39:07,674 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 21:39:07,675 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 21:39:07,675 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 21:39:07,679 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 21:39:07,680 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 09:39:05" (1/3) ... [2020-09-24 21:39:07,681 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 09:39:07, skipping insertion in model container [2020-09-24 21:39:07,681 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:39:05" (2/3) ... [2020-09-24 21:39:07,681 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 09:39:07, skipping insertion in model container [2020-09-24 21:39:07,681 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 09:39:07" (3/3) ... [2020-09-24 21:39:07,684 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem01_label10.c [2020-09-24 21:39:07,695 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 21:39:07,707 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 21:39:07,729 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 21:39:07,762 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 21:39:07,763 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 21:39:07,763 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 21:39:07,763 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 21:39:07,763 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 21:39:07,763 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 21:39:07,763 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 21:39:07,764 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 21:39:07,796 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states. [2020-09-24 21:39:07,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-09-24 21:39:07,823 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:39:07,824 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] [2020-09-24 21:39:07,825 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:39:07,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:39:07,833 INFO L82 PathProgramCache]: Analyzing trace with hash 346455735, now seen corresponding path program 1 times [2020-09-24 21:39:07,844 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:39:07,844 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1036488076] [2020-09-24 21:39:07,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:39:08,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:39:08,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:08,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:09,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:09,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:11,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:13,118 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:39:13,118 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 147 [2020-09-24 21:39:13,119 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-24 21:39:13,119 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5027 [2020-09-24 21:39:13,122 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:39:13,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-09-24 21:39:13,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-24 21:39:13,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 79 [2020-09-24 21:39:13,123 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-24 21:39:13,963 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 45 [2020-09-24 21:39:14,189 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 42 [2020-09-24 21:39:14,354 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 38 [2020-09-24 21:39:14,496 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 35 [2020-09-24 21:39:14,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:39:14,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:39:14,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:14,901 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:39:14,902 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-24 21:39:14,902 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:39:14,902 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 114 [2020-09-24 21:39:14,903 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:39:14,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-24 21:39:14,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:39:14,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-09-24 21:39:14,904 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:39:15,367 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 21:39:15,368 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1036488076] [2020-09-24 21:39:15,370 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 21:39:15,371 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2020-09-24 21:39:15,372 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054403987] [2020-09-24 21:39:15,383 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-24 21:39:15,383 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:39:15,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-24 21:39:15,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2020-09-24 21:39:15,406 INFO L87 Difference]: Start difference. First operand 525 states. Second operand 19 states. [2020-09-24 21:39:15,836 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 94 [2020-09-24 21:39:16,065 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 94 [2020-09-24 21:39:16,392 WARN L193 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 114 [2020-09-24 21:39:16,772 WARN L193 SmtUtils]: Spent 321.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 111 [2020-09-24 21:39:17,078 WARN L193 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 108 [2020-09-24 21:39:17,609 WARN L193 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 105 [2020-09-24 21:39:18,583 WARN L193 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 102 [2020-09-24 21:39:19,083 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 97 [2020-09-24 21:39:22,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:39:22,398 INFO L93 Difference]: Finished difference Result 1700 states and 2421 transitions. [2020-09-24 21:39:22,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-24 21:39:22,401 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 138 [2020-09-24 21:39:22,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:39:22,431 INFO L225 Difference]: With dead ends: 1700 [2020-09-24 21:39:22,432 INFO L226 Difference]: Without dead ends: 1101 [2020-09-24 21:39:22,445 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=311, Invalid=681, Unknown=0, NotChecked=0, Total=992 [2020-09-24 21:39:22,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1101 states. [2020-09-24 21:39:22,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1101 to 985. [2020-09-24 21:39:22,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 985 states. [2020-09-24 21:39:22,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 985 states to 985 states and 1147 transitions. [2020-09-24 21:39:22,604 INFO L78 Accepts]: Start accepts. Automaton has 985 states and 1147 transitions. Word has length 138 [2020-09-24 21:39:22,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:39:22,605 INFO L479 AbstractCegarLoop]: Abstraction has 985 states and 1147 transitions. [2020-09-24 21:39:22,605 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-24 21:39:22,606 INFO L276 IsEmpty]: Start isEmpty. Operand 985 states and 1147 transitions. [2020-09-24 21:39:22,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2020-09-24 21:39:22,621 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:39:22,622 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-09-24 21:39:22,622 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 21:39:22,622 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:39:22,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:39:22,628 INFO L82 PathProgramCache]: Analyzing trace with hash 1568655138, now seen corresponding path program 1 times [2020-09-24 21:39:22,628 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:39:22,629 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1367284272] [2020-09-24 21:39:22,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:39:22,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:39:22,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:22,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:22,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:23,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:25,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:25,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:26,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:27,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:27,687 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:39:27,688 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 189 [2020-09-24 21:39:27,688 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-24 21:39:27,688 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-09-24 21:39:27,689 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:39:27,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-09-24 21:39:27,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-24 21:39:27,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 125 [2020-09-24 21:39:27,690 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:39:28,187 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:39:28,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:39:28,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:28,237 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:39:28,237 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-24 21:39:28,237 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:39:28,238 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 43 [2020-09-24 21:39:28,238 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:39:28,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 21:39:28,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:39:28,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-09-24 21:39:28,239 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:39:28,333 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-09-24 21:39:28,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:39:28,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:28,382 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:39:28,382 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-24 21:39:28,382 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:39:28,382 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 44 [2020-09-24 21:39:28,383 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:39:28,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 21:39:28,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-24 21:39:28,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-09-24 21:39:28,383 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:39:28,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-09-24 21:39:28,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:39:28,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:28,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:28,542 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:39:28,542 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-09-24 21:39:28,543 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:39:28,543 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 69 [2020-09-24 21:39:28,543 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:39:28,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 21:39:28,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-24 21:39:28,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-24 21:39:28,544 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:39:28,876 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 25 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-24 21:39:28,876 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1367284272] [2020-09-24 21:39:28,877 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:39:28,877 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-09-24 21:39:28,877 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457830471] [2020-09-24 21:39:28,880 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-24 21:39:28,880 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:39:28,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-24 21:39:28,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2020-09-24 21:39:28,881 INFO L87 Difference]: Start difference. First operand 985 states and 1147 transitions. Second operand 23 states. [2020-09-24 21:39:29,473 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 69 [2020-09-24 21:39:31,921 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 83 [2020-09-24 21:39:32,203 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 83 [2020-09-24 21:39:32,885 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 81 [2020-09-24 21:39:33,220 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 81 [2020-09-24 21:39:33,426 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 79 [2020-09-24 21:39:33,853 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 79 [2020-09-24 21:39:34,085 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 82 [2020-09-24 21:39:34,411 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 90 [2020-09-24 21:39:35,132 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 89 [2020-09-24 21:39:35,921 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 77 [2020-09-24 21:39:36,244 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 88 [2020-09-24 21:39:36,457 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 77 [2020-09-24 21:39:37,118 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2020-09-24 21:39:37,267 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 74 [2020-09-24 21:39:37,545 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 74 [2020-09-24 21:39:37,826 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 86 [2020-09-24 21:39:38,693 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 84 [2020-09-24 21:39:40,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:39:40,303 INFO L93 Difference]: Finished difference Result 3511 states and 4496 transitions. [2020-09-24 21:39:40,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-09-24 21:39:40,304 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 176 [2020-09-24 21:39:40,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:39:40,331 INFO L225 Difference]: With dead ends: 3511 [2020-09-24 21:39:40,331 INFO L226 Difference]: Without dead ends: 2614 [2020-09-24 21:39:40,340 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 833 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=842, Invalid=2464, Unknown=0, NotChecked=0, Total=3306 [2020-09-24 21:39:40,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2614 states. [2020-09-24 21:39:40,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2614 to 2187. [2020-09-24 21:39:40,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2187 states. [2020-09-24 21:39:40,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2187 states to 2187 states and 2650 transitions. [2020-09-24 21:39:40,451 INFO L78 Accepts]: Start accepts. Automaton has 2187 states and 2650 transitions. Word has length 176 [2020-09-24 21:39:40,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:39:40,452 INFO L479 AbstractCegarLoop]: Abstraction has 2187 states and 2650 transitions. [2020-09-24 21:39:40,452 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-24 21:39:40,452 INFO L276 IsEmpty]: Start isEmpty. Operand 2187 states and 2650 transitions. [2020-09-24 21:39:40,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2020-09-24 21:39:40,463 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:39:40,463 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:39:40,463 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 21:39:40,463 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:39:40,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:39:40,464 INFO L82 PathProgramCache]: Analyzing trace with hash 381395248, now seen corresponding path program 1 times [2020-09-24 21:39:40,464 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:39:40,464 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2041015371] [2020-09-24 21:39:40,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:39:40,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:39:40,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:40,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:40,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:40,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:42,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:42,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:43,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:45,525 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:39:45,525 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 193 [2020-09-24 21:39:45,525 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-24 21:39:45,526 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5027 [2020-09-24 21:39:45,526 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:39:45,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-24 21:39:45,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-09-24 21:39:45,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-09-24 21:39:45,527 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:39:45,604 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:39:45,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:39:45,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:45,634 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:39:45,635 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-24 21:39:45,635 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:39:45,635 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-09-24 21:39:45,636 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:39:45,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 21:39:45,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:39:45,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-24 21:39:45,640 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-24 21:39:45,668 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-09-24 21:39:45,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:39:45,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:45,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:45,715 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:39:45,715 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-09-24 21:39:45,716 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:39:45,716 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 43 [2020-09-24 21:39:45,716 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:39:45,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 21:39:45,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-24 21:39:45,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-24 21:39:45,725 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 8 [2020-09-24 21:39:45,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-09-24 21:39:45,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:39:45,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:45,788 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:39:45,788 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-09-24 21:39:45,788 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:39:45,788 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 42 [2020-09-24 21:39:45,789 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:39:45,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 21:39:45,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-24 21:39:45,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-24 21:39:45,789 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:39:45,858 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 29 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-09-24 21:39:45,858 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2041015371] [2020-09-24 21:39:45,859 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:39:45,859 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-24 21:39:45,859 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454798788] [2020-09-24 21:39:45,860 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-24 21:39:45,861 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:39:45,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-24 21:39:45,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-09-24 21:39:45,862 INFO L87 Difference]: Start difference. First operand 2187 states and 2650 transitions. Second operand 7 states. [2020-09-24 21:39:48,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:39:48,369 INFO L93 Difference]: Finished difference Result 5529 states and 7072 transitions. [2020-09-24 21:39:48,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-24 21:39:48,369 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 180 [2020-09-24 21:39:48,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:39:48,390 INFO L225 Difference]: With dead ends: 5529 [2020-09-24 21:39:48,391 INFO L226 Difference]: Without dead ends: 3430 [2020-09-24 21:39:48,401 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-09-24 21:39:48,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3430 states. [2020-09-24 21:39:48,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3430 to 3314. [2020-09-24 21:39:48,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3314 states. [2020-09-24 21:39:48,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3314 states to 3314 states and 4083 transitions. [2020-09-24 21:39:48,510 INFO L78 Accepts]: Start accepts. Automaton has 3314 states and 4083 transitions. Word has length 180 [2020-09-24 21:39:48,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:39:48,513 INFO L479 AbstractCegarLoop]: Abstraction has 3314 states and 4083 transitions. [2020-09-24 21:39:48,513 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-24 21:39:48,513 INFO L276 IsEmpty]: Start isEmpty. Operand 3314 states and 4083 transitions. [2020-09-24 21:39:48,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2020-09-24 21:39:48,529 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:39:48,529 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:39:48,529 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 21:39:48,530 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:39:48,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:39:48,530 INFO L82 PathProgramCache]: Analyzing trace with hash -88854963, now seen corresponding path program 1 times [2020-09-24 21:39:48,530 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:39:48,531 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1709276157] [2020-09-24 21:39:48,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:39:48,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:39:48,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:48,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:49,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:49,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:49,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:52,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:52,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:53,581 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:39:53,582 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 203 [2020-09-24 21:39:53,582 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-24 21:39:53,582 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-09-24 21:39:53,582 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:39:53,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-09-24 21:39:53,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-09-24 21:39:53,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 144 [2020-09-24 21:39:53,583 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:39:53,757 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:39:53,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:39:53,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:53,791 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:39:53,791 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-24 21:39:53,792 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:39:53,792 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-09-24 21:39:53,792 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:39:53,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 21:39:53,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:39:53,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-09-24 21:39:53,793 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:39:53,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-09-24 21:39:53,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:39:53,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:53,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:53,871 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:39:53,871 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-09-24 21:39:53,871 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:39:53,872 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 44 [2020-09-24 21:39:53,872 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:39:53,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 21:39:53,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:39:53,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-24 21:39:53,873 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:39:53,889 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-09-24 21:39:53,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:39:53,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:53,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:54,041 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:39:54,041 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-24 21:39:54,041 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:39:54,041 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 145 [2020-09-24 21:39:54,042 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:39:54,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-24 21:39:54,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-24 21:39:54,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-09-24 21:39:54,042 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:39:54,412 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 29 [2020-09-24 21:39:54,648 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 45 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-24 21:39:54,649 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1709276157] [2020-09-24 21:39:54,649 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:39:54,649 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-24 21:39:54,649 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783834784] [2020-09-24 21:39:54,650 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-24 21:39:54,650 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:39:54,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-24 21:39:54,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-09-24 21:39:54,651 INFO L87 Difference]: Start difference. First operand 3314 states and 4083 transitions. Second operand 13 states.